includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\Logger\LoggerFactory;
  24 use MediaWiki\MediaWikiServices;
  25 use Wikimedia\ScopedCallback;
  26
  27 /**
  28  * The edit page/HTML interface (split from Article)
  29  * The actual database and text munging is still in Article,
  30  * but it should get easier to call those from alternate
  31  * interfaces.
  32  *
  33  * EditPage cares about two distinct titles:
  34  * $this->mContextTitle is the page that forms submit to, links point to,
  35  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  36  * page in the database that is actually being edited. These are
  37  * usually the same, but they are now allowed to be different.
  38  *
  39  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  40  * headaches, which may be fatal.
  41  */
  42 class EditPage {
  43         /**
  44          * Status: Article successfully updated
  45          */
  46         const AS_SUCCESS_UPDATE = 200;
  47
  48         /**
  49          * Status: Article successfully created
  50          */
  51         const AS_SUCCESS_NEW_ARTICLE = 201;
  52
  53         /**
  54          * Status: Article update aborted by a hook function
  55          */
  56         const AS_HOOK_ERROR = 210;
  57
  58         /**
  59          * Status: A hook function returned an error
  60          */
  61         const AS_HOOK_ERROR_EXPECTED = 212;
  62
  63         /**
  64          * Status: User is blocked from editing this page
  65          */
  66         const AS_BLOCKED_PAGE_FOR_USER = 215;
  67
  68         /**
  69          * Status: Content too big (> $wgMaxArticleSize)
  70          */
  71         const AS_CONTENT_TOO_BIG = 216;
  72
  73         /**
  74          * Status: this anonymous user is not allowed to edit this page
  75          */
  76         const AS_READ_ONLY_PAGE_ANON = 218;
  77
  78         /**
  79          * Status: this logged in user is not allowed to edit this page
  80          */
  81         const AS_READ_ONLY_PAGE_LOGGED = 219;
  82
  83         /**
  84          * Status: wiki is in readonly mode (wfReadOnly() == true)
  85          */
  86         const AS_READ_ONLY_PAGE = 220;
  87
  88         /**
  89          * Status: rate limiter for action 'edit' was tripped
  90          */
  91         const AS_RATE_LIMITED = 221;
  92
  93         /**
  94          * Status: article was deleted while editing and param wpRecreate == false or form
  95          * was not posted
  96          */
  97         const AS_ARTICLE_WAS_DELETED = 222;
  98
  99         /**
 100          * Status: user tried to create this page, but is not allowed to do that
 101          * ( Title->userCan('create') == false )
 102          */
 103         const AS_NO_CREATE_PERMISSION = 223;
 104
 105         /**
 106          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 107          */
 108         const AS_BLANK_ARTICLE = 224;
 109
 110         /**
 111          * Status: (non-resolvable) edit conflict
 112          */
 113         const AS_CONFLICT_DETECTED = 225;
 114
 115         /**
 116          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 117          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 118          */
 119         const AS_SUMMARY_NEEDED = 226;
 120
 121         /**
 122          * Status: user tried to create a new section without content
 123          */
 124         const AS_TEXTBOX_EMPTY = 228;
 125
 126         /**
 127          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 128          */
 129         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 130
 131         /**
 132          * Status: WikiPage::doEdit() was unsuccessful
 133          */
 134         const AS_END = 231;
 135
 136         /**
 137          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 138          */
 139         const AS_SPAM_ERROR = 232;
 140
 141         /**
 142          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 143          */
 144         const AS_IMAGE_REDIRECT_ANON = 233;
 145
 146         /**
 147          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 148          */
 149         const AS_IMAGE_REDIRECT_LOGGED = 234;
 150
 151         /**
 152          * Status: user tried to modify the content model, but is not allowed to do that
 153          * ( User::isAllowed('editcontentmodel') == false )
 154          */
 155         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 156
 157         /**
 158          * Status: user tried to create self-redirect (redirect to the same article) and
 159          * wpIgnoreSelfRedirect == false
 160          */
 161         const AS_SELF_REDIRECT = 236;
 162
 163         /**
 164          * Status: an error relating to change tagging. Look at the message key for
 165          * more details
 166          */
 167         const AS_CHANGE_TAG_ERROR = 237;
 168
 169         /**
 170          * Status: can't parse content
 171          */
 172         const AS_PARSE_ERROR = 240;
 173
 174         /**
 175          * Status: when changing the content model is disallowed due to
 176          * $wgContentHandlerUseDB being false
 177          */
 178         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 179
 180         /**
 181          * HTML id and name for the beginning of the edit form.
 182          */
 183         const EDITFORM_ID = 'editform';
 184
 185         /**
 186          * Prefix of key for cookie used to pass post-edit state.
 187          * The revision id edited is added after this
 188          */
 189         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 190
 191         /**
 192          * Duration of PostEdit cookie, in seconds.
 193          * The cookie will be removed instantly if the JavaScript runs.
 194          *
 195          * Otherwise, though, we don't want the cookies to accumulate.
 196          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 197          * limit of only 20 cookies per domain. This still applies at least to some
 198          * versions of IE without full updates:
 199          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 200          *
 201          * A value of 20 minutes should be enough to take into account slow loads and minor
 202          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 203          */
 204         const POST_EDIT_COOKIE_DURATION = 1200;
 205
 206         /** @var Article */
 207         public $mArticle;
 208         /** @var WikiPage */
 209         private $page;
 210
 211         /** @var Title */
 212         public $mTitle;
 213
 214         /** @var null|Title */
 215         private $mContextTitle = null;
 216
 217         /** @var string */
 218         public $action = 'submit';
 219
 220         /** @var bool */
 221         public $isConflict = false;
 222
 223         /** @var bool */
 224         public $isCssJsSubpage = false;
 225
 226         /** @var bool */
 227         public $isCssSubpage = false;
 228
 229         /** @var bool */
 230         public $isJsSubpage = false;
 231
 232         /** @var bool */
 233         public $isWrongCaseCssJsPage = false;
 234
 235         /** @var bool New page or new section */
 236         public $isNew = false;
 237
 238         /** @var bool */
 239         public $deletedSinceEdit;
 240
 241         /** @var string */
 242         public $formtype;
 243
 244         /** @var bool */
 245         public $firsttime;
 246
 247         /** @var bool|stdClass */
 248         public $lastDelete;
 249
 250         /** @var bool */
 251         public $mTokenOk = false;
 252
 253         /** @var bool */
 254         public $mTokenOkExceptSuffix = false;
 255
 256         /** @var bool */
 257         public $mTriedSave = false;
 258
 259         /** @var bool */
 260         public $incompleteForm = false;
 261
 262         /** @var bool */
 263         public $tooBig = false;
 264
 265         /** @var bool */
 266         public $missingComment = false;
 267
 268         /** @var bool */
 269         public $missingSummary = false;
 270
 271         /** @var bool */
 272         public $allowBlankSummary = false;
 273
 274         /** @var bool */
 275         protected $blankArticle = false;
 276
 277         /** @var bool */
 278         protected $allowBlankArticle = false;
 279
 280         /** @var bool */
 281         protected $selfRedirect = false;
 282
 283         /** @var bool */
 284         protected $allowSelfRedirect = false;
 285
 286         /** @var string */
 287         public $autoSumm = '';
 288
 289         /** @var string */
 290         public $hookError = '';
 291
 292         /** @var ParserOutput */
 293         public $mParserOutput;
 294
 295         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 296         public $hasPresetSummary = false;
 297
 298         /** @var Revision|bool */
 299         public $mBaseRevision = false;
 300
 301         /** @var bool */
 302         public $mShowSummaryField = true;
 303
 304         # Form values
 305
 306         /** @var bool */
 307         public $save = false;
 308
 309         /** @var bool */
 310         public $preview = false;
 311
 312         /** @var bool */
 313         public $diff = false;
 314
 315         /** @var bool */
 316         public $minoredit = false;
 317
 318         /** @var bool */
 319         public $watchthis = false;
 320
 321         /** @var bool */
 322         public $recreate = false;
 323
 324         /** @var string */
 325         public $textbox1 = '';
 326
 327         /** @var string */
 328         public $textbox2 = '';
 329
 330         /** @var string */
 331         public $summary = '';
 332
 333         /** @var bool */
 334         public $nosummary = false;
 335
 336         /** @var string */
 337         public $edittime = '';
 338
 339         /** @var int */
 340         private $editRevId = null;
 341
 342         /** @var string */
 343         public $section = '';
 344
 345         /** @var string */
 346         public $sectiontitle = '';
 347
 348         /** @var string */
 349         public $starttime = '';
 350
 351         /** @var int */
 352         public $oldid = 0;
 353
 354         /** @var int */
 355         public $parentRevId = 0;
 356
 357         /** @var string */
 358         public $editintro = '';
 359
 360         /** @var null */
 361         public $scrolltop = null;
 362
 363         /** @var bool */
 364         public $bot = true;
 365
 366         /** @var string */
 367         public $contentModel;
 368
 369         /** @var null|string */
 370         public $contentFormat = null;
 371
 372         /** @var null|array */
 373         private $changeTags = null;
 374
 375         # Placeholders for text injection by hooks (must be HTML)
 376         # extensions should take care to _append_ to the present value
 377
 378         /** @var string Before even the preview */
 379         public $editFormPageTop = '';
 380         public $editFormTextTop = '';
 381         public $editFormTextBeforeContent = '';
 382         public $editFormTextAfterWarn = '';
 383         public $editFormTextAfterTools = '';
 384         public $editFormTextBottom = '';
 385         public $editFormTextAfterContent = '';
 386         public $previewTextAfterContent = '';
 387         public $mPreloadContent = null;
 388
 389         /* $didSave should be set to true whenever an article was successfully altered. */
 390         public $didSave = false;
 391         public $undidRev = 0;
 392
 393         public $suppressIntro = false;
 394
 395         /** @var bool */
 396         protected $edit;
 397
 398         /** @var bool|int */
 399         protected $contentLength = false;
 400
 401         /**
 402          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 403          */
 404         private $enableApiEditOverride = false;
 405
 406         /**
 407          * @var IContextSource
 408          */
 409         protected $context;
 410
 411         /**
 412          * @var bool Whether an old revision is edited
 413          */
 414         private $isOldRev = false;
 415
 416         /**
 417          * @param Article $article
 418          */
 419         public function __construct( Article $article ) {
 420                 $this->mArticle = $article;
 421                 $this->page = $article->getPage(); // model object
 422                 $this->mTitle = $article->getTitle();
 423                 $this->context = $article->getContext();
 424
 425                 $this->contentModel = $this->mTitle->getContentModel();
 426
 427                 $handler = ContentHandler::getForModelID( $this->contentModel );
 428                 $this->contentFormat = $handler->getDefaultFormat();
 429         }
 430
 431         /**
 432          * @return Article
 433          */
 434         public function getArticle() {
 435                 return $this->mArticle;
 436         }
 437
 438         /**
 439          * @since 1.28
 440          * @return IContextSource
 441          */
 442         public function getContext() {
 443                 return $this->context;
 444         }
 445
 446         /**
 447          * @since 1.19
 448          * @return Title
 449          */
 450         public function getTitle() {
 451                 return $this->mTitle;
 452         }
 453
 454         /**
 455          * Set the context Title object
 456          *
 457          * @param Title|null $title Title object or null
 458          */
 459         public function setContextTitle( $title ) {
 460                 $this->mContextTitle = $title;
 461         }
 462
 463         /**
 464          * Get the context title object.
 465          * If not set, $wgTitle will be returned. This behavior might change in
 466          * the future to return $this->mTitle instead.
 467          *
 468          * @return Title
 469          */
 470         public function getContextTitle() {
 471                 if ( is_null( $this->mContextTitle ) ) {
 472                         global $wgTitle;
 473                         return $wgTitle;
 474                 } else {
 475                         return $this->mContextTitle;
 476                 }
 477         }
 478
 479         /**
 480          * Check if the edit page is using OOUI controls
 481          * @return bool Always true
 482          * @deprecated since 1.30
 483          */
 484         public function isOouiEnabled() {
 485                 return true;
 486         }
 487
 488         /**
 489          * Returns if the given content model is editable.
 490          *
 491          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 492          * @return bool
 493          * @throws MWException If $modelId has no known handler
 494          */
 495         public function isSupportedContentModel( $modelId ) {
 496                 return $this->enableApiEditOverride === true ||
 497                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 498         }
 499
 500         /**
 501          * Allow editing of content that supports API direct editing, but not general
 502          * direct editing. Set to false by default.
 503          *
 504          * @param bool $enableOverride
 505          */
 506         public function setApiEditOverride( $enableOverride ) {
 507                 $this->enableApiEditOverride = $enableOverride;
 508         }
 509
 510         /**
 511          * @deprecated since 1.29, call edit directly
 512          */
 513         public function submit() {
 514                 wfDeprecated( __METHOD__, '1.29' );
 515                 $this->edit();
 516         }
 517
 518         /**
 519          * This is the function that gets called for "action=edit". It
 520          * sets up various member variables, then passes execution to
 521          * another function, usually showEditForm()
 522          *
 523          * The edit form is self-submitting, so that when things like
 524          * preview and edit conflicts occur, we get the same form back
 525          * with the extra stuff added.  Only when the final submission
 526          * is made and all is well do we actually save and redirect to
 527          * the newly-edited page.
 528          */
 529         public function edit() {
 530                 global $wgRequest;
 531                 // Allow extensions to modify/prevent this form or submission
 532                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 533                         return;
 534                 }
 535
 536                 wfDebug( __METHOD__ . ": enter\n" );
 537
 538                 // If they used redlink=1 and the page exists, redirect to the main article
 539                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 540                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 541                         return;
 542                 }
 543
 544                 $this->importFormData( $wgRequest );
 545                 $this->firsttime = false;
 546
 547                 if ( wfReadOnly() && $this->save ) {
 548                         // Force preview
 549                         $this->save = false;
 550                         $this->preview = true;
 551                 }
 552
 553                 if ( $this->save ) {
 554                         $this->formtype = 'save';
 555                 } elseif ( $this->preview ) {
 556                         $this->formtype = 'preview';
 557                 } elseif ( $this->diff ) {
 558                         $this->formtype = 'diff';
 559                 } else { # First time through
 560                         $this->firsttime = true;
 561                         if ( $this->previewOnOpen() ) {
 562                                 $this->formtype = 'preview';
 563                         } else {
 564                                 $this->formtype = 'initial';
 565                         }
 566                 }
 567
 568                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 569                 if ( $permErrors ) {
 570                         wfDebug( __METHOD__ . ": User can't edit\n" );
 571                         // Auto-block user's IP if the account was "hard" blocked
 572                         if ( !wfReadOnly() ) {
 573                                 DeferredUpdates::addCallableUpdate( function () {
 574                                         $this->context->getUser()->spreadAnyEditBlock();
 575                                 } );
 576                         }
 577                         $this->displayPermissionsError( $permErrors );
 578
 579                         return;
 580                 }
 581
 582                 $revision = $this->mArticle->getRevisionFetched();
 583                 // Disallow editing revisions with content models different from the current one
 584                 // Undo edits being an exception in order to allow reverting content model changes.
 585                 if ( $revision
 586                         && $revision->getContentModel() !== $this->contentModel
 587                 ) {
 588                         $prevRev = null;
 589                         if ( $this->undidRev ) {
 590                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 591                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 592                         }
 593                         if ( !$this->undidRev
 594                                 || !$prevRev
 595                                 || $prevRev->getContentModel() !== $this->contentModel
 596                         ) {
 597                                 $this->displayViewSourcePage(
 598                                         $this->getContentObject(),
 599                                         $this->context->msg(
 600                                                 'contentmodelediterror',
 601                                                 $revision->getContentModel(),
 602                                                 $this->contentModel
 603                                         )->plain()
 604                                 );
 605                                 return;
 606                         }
 607                 }
 608
 609                 $this->isConflict = false;
 610                 // css / js subpages of user pages get a special treatment
 611                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 612                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 613                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 614                 // @todo FIXME: Silly assignment.
 615                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 616
 617                 # Show applicable editing introductions
 618                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 619                         $this->showIntro();
 620                 }
 621
 622                 # Attempt submission here.  This will check for edit conflicts,
 623                 # and redundantly check for locked database, blocked IPs, etc.
 624                 # that edit() already checked just in case someone tries to sneak
 625                 # in the back door with a hand-edited submission URL.
 626
 627                 if ( 'save' == $this->formtype ) {
 628                         $resultDetails = null;
 629                         $status = $this->attemptSave( $resultDetails );
 630                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 631                                 return;
 632                         }
 633                 }
 634
 635                 # First time through: get contents, set time for conflict
 636                 # checking, etc.
 637                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 638                         if ( $this->initialiseForm() === false ) {
 639                                 $this->noSuchSectionPage();
 640                                 return;
 641                         }
 642
 643                         if ( !$this->mTitle->getArticleID() ) {
 644                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 645                         } else {
 646                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 647                         }
 648
 649                 }
 650
 651                 $this->showEditForm();
 652         }
 653
 654         /**
 655          * @param string $rigor Same format as Title::getUserPermissionErrors()
 656          * @return array
 657          */
 658         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 659                 $user = $this->context->getUser();
 660                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 661                 # Can this title be created?
 662                 if ( !$this->mTitle->exists() ) {
 663                         $permErrors = array_merge(
 664                                 $permErrors,
 665                                 wfArrayDiff2(
 666                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 667                                         $permErrors
 668                                 )
 669                         );
 670                 }
 671                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 672                 $remove = [];
 673                 foreach ( $permErrors as $error ) {
 674                         if ( ( $this->preview || $this->diff )
 675                                 && (
 676                                         $error[0] == 'blockedtext' ||
 677                                         $error[0] == 'autoblockedtext' ||
 678                                         $error[0] == 'systemblockedtext'
 679                                 )
 680                         ) {
 681                                 $remove[] = $error;
 682                         }
 683                 }
 684                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 685
 686                 return $permErrors;
 687         }
 688
 689         /**
 690          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 691          * but with the following differences:
 692          * - If redlink=1, the user will be redirected to the page
 693          * - If there is content to display or the error occurs while either saving,
 694          *   previewing or showing the difference, it will be a
 695          *   "View source for ..." page displaying the source code after the error message.
 696          *
 697          * @since 1.19
 698          * @param array $permErrors Array of permissions errors, as returned by
 699          *    Title::getUserPermissionsErrors().
 700          * @throws PermissionsError
 701          */
 702         protected function displayPermissionsError( array $permErrors ) {
 703                 global $wgRequest;
 704
 705                 $out = $this->context->getOutput();
 706                 if ( $wgRequest->getBool( 'redlink' ) ) {
 707                         // The edit page was reached via a red link.
 708                         // Redirect to the article page and let them click the edit tab if
 709                         // they really want a permission error.
 710                         $out->redirect( $this->mTitle->getFullURL() );
 711                         return;
 712                 }
 713
 714                 $content = $this->getContentObject();
 715
 716                 # Use the normal message if there's nothing to display
 717                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 718                         $action = $this->mTitle->exists() ? 'edit' :
 719                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 720                         throw new PermissionsError( $action, $permErrors );
 721                 }
 722
 723                 $this->displayViewSourcePage(
 724                         $content,
 725                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 726                 );
 727         }
 728
 729         /**
 730          * Display a read-only View Source page
 731          * @param Content $content content object
 732          * @param string $errorMessage additional wikitext error message to display
 733          */
 734         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 735                 $out = $this->context->getOutput();
 736                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 737
 738                 $out->setRobotPolicy( 'noindex,nofollow' );
 739                 $out->setPageTitle( $this->context->msg(
 740                         'viewsource-title',
 741                         $this->getContextTitle()->getPrefixedText()
 742                 ) );
 743                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 744                 $out->addHTML( $this->editFormPageTop );
 745                 $out->addHTML( $this->editFormTextTop );
 746
 747                 if ( $errorMessage !== '' ) {
 748                         $out->addWikiText( $errorMessage );
 749                         $out->addHTML( "<hr />\n" );
 750                 }
 751
 752                 # If the user made changes, preserve them when showing the markup
 753                 # (This happens when a user is blocked during edit, for instance)
 754                 if ( !$this->firsttime ) {
 755                         $text = $this->textbox1;
 756                         $out->addWikiMsg( 'viewyourtext' );
 757                 } else {
 758                         try {
 759                                 $text = $this->toEditText( $content );
 760                         } catch ( MWException $e ) {
 761                                 # Serialize using the default format if the content model is not supported
 762                                 # (e.g. for an old revision with a different model)
 763                                 $text = $content->serialize();
 764                         }
 765                         $out->addWikiMsg( 'viewsourcetext' );
 766                 }
 767
 768                 $out->addHTML( $this->editFormTextBeforeContent );
 769                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 770                 $out->addHTML( $this->editFormTextAfterContent );
 771
 772                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 773
 774                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 775
 776                 $out->addHTML( $this->editFormTextBottom );
 777                 if ( $this->mTitle->exists() ) {
 778                         $out->returnToMain( null, $this->mTitle );
 779                 }
 780         }
 781
 782         /**
 783          * Should we show a preview when the edit form is first shown?
 784          *
 785          * @return bool
 786          */
 787         protected function previewOnOpen() {
 788                 global $wgRequest, $wgPreviewOnOpenNamespaces;
 789                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 790                         // Explicit override from request
 791                         return true;
 792                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 793                         // Explicit override from request
 794                         return false;
 795                 } elseif ( $this->section == 'new' ) {
 796                         // Nothing *to* preview for new sections
 797                         return false;
 798                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 799                         && $this->context->getUser()->getOption( 'previewonfirst' )
 800                 ) {
 801                         // Standard preference behavior
 802                         return true;
 803                 } elseif ( !$this->mTitle->exists()
 804                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 805                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 806                 ) {
 807                         // Categories are special
 808                         return true;
 809                 } else {
 810                         return false;
 811                 }
 812         }
 813
 814         /**
 815          * Checks whether the user entered a skin name in uppercase,
 816          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 817          *
 818          * @return bool
 819          */
 820         protected function isWrongCaseCssJsPage() {
 821                 if ( $this->mTitle->isCssJsSubpage() ) {
 822                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 823                         $skins = array_merge(
 824                                 array_keys( Skin::getSkinNames() ),
 825                                 [ 'common' ]
 826                         );
 827                         return !in_array( $name, $skins )
 828                                 && in_array( strtolower( $name ), $skins );
 829                 } else {
 830                         return false;
 831                 }
 832         }
 833
 834         /**
 835          * Returns whether section editing is supported for the current page.
 836          * Subclasses may override this to replace the default behavior, which is
 837          * to check ContentHandler::supportsSections.
 838          *
 839          * @return bool True if this edit page supports sections, false otherwise.
 840          */
 841         protected function isSectionEditSupported() {
 842                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 843                 return $contentHandler->supportsSections();
 844         }
 845
 846         /**
 847          * This function collects the form data and uses it to populate various member variables.
 848          * @param WebRequest &$request
 849          * @throws ErrorPageError
 850          */
 851         public function importFormData( &$request ) {
 852                 # Section edit can come from either the form or a link
 853                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 854
 855                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 856                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 857                 }
 858
 859                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 860
 861                 if ( $request->wasPosted() ) {
 862                         # These fields need to be checked for encoding.
 863                         # Also remove trailing whitespace, but don't remove _initial_
 864                         # whitespace from the text boxes. This may be significant formatting.
 865                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 866                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 867                                 // Skip this if wpTextbox2 has input, it indicates that we came
 868                                 // from a conflict page with raw page text, not a custom form
 869                                 // modified by subclasses
 870                                 $textbox1 = $this->importContentFormData( $request );
 871                                 if ( $textbox1 !== null ) {
 872                                         $this->textbox1 = $textbox1;
 873                                 }
 874                         }
 875
 876                         $this->summary = $request->getText( 'wpSummary' );
 877
 878                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 879                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 880                         # section titles.
 881                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 882
 883                         # Treat sectiontitle the same way as summary.
 884                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 885                         # currently doing double duty as both edit summary and section title. Right now this
 886                         # is just to allow API edits to work around this limitation, but this should be
 887                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 888                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 889                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 890
 891                         $this->edittime = $request->getVal( 'wpEdittime' );
 892                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 893                         $this->starttime = $request->getVal( 'wpStarttime' );
 894
 895                         $undidRev = $request->getInt( 'wpUndidRevision' );
 896                         if ( $undidRev ) {
 897                                 $this->undidRev = $undidRev;
 898                         }
 899
 900                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 901
 902                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 903                                 // wpTextbox1 field is missing, possibly due to being "too big"
 904                                 // according to some filter rules such as Suhosin's setting for
 905                                 // suhosin.request.max_value_length (d'oh)
 906                                 $this->incompleteForm = true;
 907                         } else {
 908                                 // If we receive the last parameter of the request, we can fairly
 909                                 // claim the POST request has not been truncated.
 910
 911                                 // TODO: softened the check for cutover.  Once we determine
 912                                 // that it is safe, we should complete the transition by
 913                                 // removing the "edittime" clause.
 914                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 915                                         && is_null( $this->edittime ) );
 916                         }
 917                         if ( $this->incompleteForm ) {
 918                                 # If the form is incomplete, force to preview.
 919                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 920                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 921                                 $this->preview = true;
 922                         } else {
 923                                 $this->preview = $request->getCheck( 'wpPreview' );
 924                                 $this->diff = $request->getCheck( 'wpDiff' );
 925
 926                                 // Remember whether a save was requested, so we can indicate
 927                                 // if we forced preview due to session failure.
 928                                 $this->mTriedSave = !$this->preview;
 929
 930                                 if ( $this->tokenOk( $request ) ) {
 931                                         # Some browsers will not report any submit button
 932                                         # if the user hits enter in the comment box.
 933                                         # The unmarked state will be assumed to be a save,
 934                                         # if the form seems otherwise complete.
 935                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 936                                 } elseif ( $this->diff ) {
 937                                         # Failed token check, but only requested "Show Changes".
 938                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 939                                 } else {
 940                                         # Page might be a hack attempt posted from
 941                                         # an external site. Preview instead of saving.
 942                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 943                                         $this->preview = true;
 944                                 }
 945                         }
 946                         $this->save = !$this->preview && !$this->diff;
 947                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 948                                 $this->edittime = null;
 949                         }
 950
 951                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 952                                 $this->starttime = null;
 953                         }
 954
 955                         $this->recreate = $request->getCheck( 'wpRecreate' );
 956
 957                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 958                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 959
 960                         $user = $this->context->getUser();
 961                         # Don't force edit summaries when a user is editing their own user or talk page
 962                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 963                                 && $this->mTitle->getText() == $user->getName()
 964                         ) {
 965                                 $this->allowBlankSummary = true;
 966                         } else {
 967                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 968                                         || !$user->getOption( 'forceeditsummary' );
 969                         }
 970
 971                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 972
 973                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 974                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 975
 976                         $changeTags = $request->getVal( 'wpChangeTags' );
 977                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 978                                 $this->changeTags = [];
 979                         } else {
 980                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 981                                         $changeTags ) ) );
 982                         }
 983                 } else {
 984                         # Not a posted form? Start with nothing.
 985                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 986                         $this->textbox1 = '';
 987                         $this->summary = '';
 988                         $this->sectiontitle = '';
 989                         $this->edittime = '';
 990                         $this->editRevId = null;
 991                         $this->starttime = wfTimestampNow();
 992                         $this->edit = false;
 993                         $this->preview = false;
 994                         $this->save = false;
 995                         $this->diff = false;
 996                         $this->minoredit = false;
 997                         // Watch may be overridden by request parameters
 998                         $this->watchthis = $request->getBool( 'watchthis', false );
 999                         $this->recreate = false;
1000
1001                         // When creating a new section, we can preload a section title by passing it as the
1002                         // preloadtitle parameter in the URL (T15100)
1003                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1004                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1005                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1006                                 $this->summary = $request->getVal( 'preloadtitle' );
1007                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1008                                 $this->summary = $request->getText( 'summary' );
1009                                 if ( $this->summary !== '' ) {
1010                                         $this->hasPresetSummary = true;
1011                                 }
1012                         }
1013
1014                         if ( $request->getVal( 'minor' ) ) {
1015                                 $this->minoredit = true;
1016                         }
1017                 }
1018
1019                 $this->oldid = $request->getInt( 'oldid' );
1020                 $this->parentRevId = $request->getInt( 'parentRevId' );
1021
1022                 $this->bot = $request->getBool( 'bot', true );
1023                 $this->nosummary = $request->getBool( 'nosummary' );
1024
1025                 // May be overridden by revision.
1026                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1027                 // May be overridden by revision.
1028                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1029
1030                 try {
1031                         $handler = ContentHandler::getForModelID( $this->contentModel );
1032                 } catch ( MWUnknownContentModelException $e ) {
1033                         throw new ErrorPageError(
1034                                 'editpage-invalidcontentmodel-title',
1035                                 'editpage-invalidcontentmodel-text',
1036                                 [ wfEscapeWikiText( $this->contentModel ) ]
1037                         );
1038                 }
1039
1040                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1041                         throw new ErrorPageError(
1042                                 'editpage-notsupportedcontentformat-title',
1043                                 'editpage-notsupportedcontentformat-text',
1044                                 [
1045                                         wfEscapeWikiText( $this->contentFormat ),
1046                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1047                                 ]
1048                         );
1049                 }
1050
1051                 /**
1052                  * @todo Check if the desired model is allowed in this namespace, and if
1053                  *   a transition from the page's current model to the new model is
1054                  *   allowed.
1055                  */
1056
1057                 $this->editintro = $request->getText( 'editintro',
1058                         // Custom edit intro for new sections
1059                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1060
1061                 // Allow extensions to modify form data
1062                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1063         }
1064
1065         /**
1066          * Subpage overridable method for extracting the page content data from the
1067          * posted form to be placed in $this->textbox1, if using customized input
1068          * this method should be overridden and return the page text that will be used
1069          * for saving, preview parsing and so on...
1070          *
1071          * @param WebRequest &$request
1072          * @return string|null
1073          */
1074         protected function importContentFormData( &$request ) {
1075                 return; // Don't do anything, EditPage already extracted wpTextbox1
1076         }
1077
1078         /**
1079          * Initialise form fields in the object
1080          * Called on the first invocation, e.g. when a user clicks an edit link
1081          * @return bool If the requested section is valid
1082          */
1083         public function initialiseForm() {
1084                 $this->edittime = $this->page->getTimestamp();
1085                 $this->editRevId = $this->page->getLatest();
1086
1087                 $content = $this->getContentObject( false ); # TODO: track content object?!
1088                 if ( $content === false ) {
1089                         return false;
1090                 }
1091                 $this->textbox1 = $this->toEditText( $content );
1092
1093                 $user = $this->context->getUser();
1094                 // activate checkboxes if user wants them to be always active
1095                 # Sort out the "watch" checkbox
1096                 if ( $user->getOption( 'watchdefault' ) ) {
1097                         # Watch all edits
1098                         $this->watchthis = true;
1099                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1100                         # Watch creations
1101                         $this->watchthis = true;
1102                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1103                         # Already watched
1104                         $this->watchthis = true;
1105                 }
1106                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1107                         $this->minoredit = true;
1108                 }
1109                 if ( $this->textbox1 === false ) {
1110                         return false;
1111                 }
1112                 return true;
1113         }
1114
1115         /**
1116          * @param Content|null $def_content The default value to return
1117          *
1118          * @return Content|null Content on success, $def_content for invalid sections
1119          *
1120          * @since 1.21
1121          */
1122         protected function getContentObject( $def_content = null ) {
1123                 global $wgRequest, $wgContLang;
1124
1125                 $content = false;
1126
1127                 $user = $this->context->getUser();
1128                 // For message page not locally set, use the i18n message.
1129                 // For other non-existent articles, use preload text if any.
1130                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1131                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1132                                 # If this is a system message, get the default text.
1133                                 $msg = $this->mTitle->getDefaultMessageText();
1134
1135                                 $content = $this->toEditContent( $msg );
1136                         }
1137                         if ( $content === false ) {
1138                                 # If requested, preload some text.
1139                                 $preload = $wgRequest->getVal( 'preload',
1140                                         // Custom preload text for new sections
1141                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1142                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1143
1144                                 $content = $this->getPreloadedContent( $preload, $params );
1145                         }
1146                 // For existing pages, get text based on "undo" or section parameters.
1147                 } else {
1148                         if ( $this->section != '' ) {
1149                                 // Get section edit text (returns $def_text for invalid sections)
1150                                 $orig = $this->getOriginalContent( $user );
1151                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1152
1153                                 if ( !$content ) {
1154                                         $content = $def_content;
1155                                 }
1156                         } else {
1157                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1158                                 $undo = $wgRequest->getInt( 'undo' );
1159
1160                                 if ( $undo > 0 && $undoafter > 0 ) {
1161                                         $undorev = Revision::newFromId( $undo );
1162                                         $oldrev = Revision::newFromId( $undoafter );
1163
1164                                         # Sanity check, make sure it's the right page,
1165                                         # the revisions exist and they were not deleted.
1166                                         # Otherwise, $content will be left as-is.
1167                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1168                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1169                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1170                                         ) {
1171                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1172
1173                                                 if ( $content === false ) {
1174                                                         # Warn the user that something went wrong
1175                                                         $undoMsg = 'failure';
1176                                                 } else {
1177                                                         $oldContent = $this->page->getContent( Revision::RAW );
1178                                                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1179                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1180                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1181                                                                 // The undo may change content
1182                                                                 // model if its reverting the top
1183                                                                 // edit. This can result in
1184                                                                 // mismatched content model/format.
1185                                                                 $this->contentModel = $newContent->getModel();
1186                                                                 $this->contentFormat = $oldrev->getContentFormat();
1187                                                         }
1188
1189                                                         if ( $newContent->equals( $oldContent ) ) {
1190                                                                 # Tell the user that the undo results in no change,
1191                                                                 # i.e. the revisions were already undone.
1192                                                                 $undoMsg = 'nochange';
1193                                                                 $content = false;
1194                                                         } else {
1195                                                                 # Inform the user of our success and set an automatic edit summary
1196                                                                 $undoMsg = 'success';
1197
1198                                                                 # If we just undid one rev, use an autosummary
1199                                                                 $firstrev = $oldrev->getNext();
1200                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1201                                                                         $userText = $undorev->getUserText();
1202                                                                         if ( $userText === '' ) {
1203                                                                                 $undoSummary = $this->context->msg(
1204                                                                                         'undo-summary-username-hidden',
1205                                                                                         $undo
1206                                                                                 )->inContentLanguage()->text();
1207                                                                         } else {
1208                                                                                 $undoSummary = $this->context->msg(
1209                                                                                         'undo-summary',
1210                                                                                         $undo,
1211                                                                                         $userText
1212                                                                                 )->inContentLanguage()->text();
1213                                                                         }
1214                                                                         if ( $this->summary === '' ) {
1215                                                                                 $this->summary = $undoSummary;
1216                                                                         } else {
1217                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1218                                                                                         ->inContentLanguage()->text() . $this->summary;
1219                                                                         }
1220                                                                         $this->undidRev = $undo;
1221                                                                 }
1222                                                                 $this->formtype = 'diff';
1223                                                         }
1224                                                 }
1225                                         } else {
1226                                                 // Failed basic sanity checks.
1227                                                 // Older revisions may have been removed since the link
1228                                                 // was created, or we may simply have got bogus input.
1229                                                 $undoMsg = 'norev';
1230                                         }
1231
1232                                         $out = $this->context->getOutput();
1233                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1234                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1235                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1236                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1237                                 }
1238
1239                                 if ( $content === false ) {
1240                                         $content = $this->getOriginalContent( $user );
1241                                 }
1242                         }
1243                 }
1244
1245                 return $content;
1246         }
1247
1248         /**
1249          * Get the content of the wanted revision, without section extraction.
1250          *
1251          * The result of this function can be used to compare user's input with
1252          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1253          * to the original text of the edit.
1254          *
1255          * This differs from Article::getContent() that when a missing revision is
1256          * encountered the result will be null and not the
1257          * 'missing-revision' message.
1258          *
1259          * @since 1.19
1260          * @param User $user The user to get the revision for
1261          * @return Content|null
1262          */
1263         private function getOriginalContent( User $user ) {
1264                 if ( $this->section == 'new' ) {
1265                         return $this->getCurrentContent();
1266                 }
1267                 $revision = $this->mArticle->getRevisionFetched();
1268                 if ( $revision === null ) {
1269                         $handler = ContentHandler::getForModelID( $this->contentModel );
1270                         return $handler->makeEmptyContent();
1271                 }
1272                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1273                 return $content;
1274         }
1275
1276         /**
1277          * Get the edit's parent revision ID
1278          *
1279          * The "parent" revision is the ancestor that should be recorded in this
1280          * page's revision history.  It is either the revision ID of the in-memory
1281          * article content, or in the case of a 3-way merge in order to rebase
1282          * across a recoverable edit conflict, the ID of the newer revision to
1283          * which we have rebased this page.
1284          *
1285          * @since 1.27
1286          * @return int Revision ID
1287          */
1288         public function getParentRevId() {
1289                 if ( $this->parentRevId ) {
1290                         return $this->parentRevId;
1291                 } else {
1292                         return $this->mArticle->getRevIdFetched();
1293                 }
1294         }
1295
1296         /**
1297          * Get the current content of the page. This is basically similar to
1298          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1299          * content object is returned instead of null.
1300          *
1301          * @since 1.21
1302          * @return Content
1303          */
1304         protected function getCurrentContent() {
1305                 $rev = $this->page->getRevision();
1306                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1307
1308                 if ( $content === false || $content === null ) {
1309                         $handler = ContentHandler::getForModelID( $this->contentModel );
1310                         return $handler->makeEmptyContent();
1311                 } elseif ( !$this->undidRev ) {
1312                         // Content models should always be the same since we error
1313                         // out if they are different before this point (in ->edit()).
1314                         // The exception being, during an undo, the current revision might
1315                         // differ from the prior revision.
1316                         $logger = LoggerFactory::getInstance( 'editpage' );
1317                         if ( $this->contentModel !== $rev->getContentModel() ) {
1318                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1319                                         'prev' => $this->contentModel,
1320                                         'new' => $rev->getContentModel(),
1321                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1322                                         'method' => __METHOD__
1323                                 ] );
1324                                 $this->contentModel = $rev->getContentModel();
1325                         }
1326
1327                         // Given that the content models should match, the current selected
1328                         // format should be supported.
1329                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1330                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1331
1332                                         'prev' => $this->contentFormat,
1333                                         'new' => $rev->getContentFormat(),
1334                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1335                                         'method' => __METHOD__
1336                                 ] );
1337                                 $this->contentFormat = $rev->getContentFormat();
1338                         }
1339                 }
1340                 return $content;
1341         }
1342
1343         /**
1344          * Use this method before edit() to preload some content into the edit box
1345          *
1346          * @param Content $content
1347          *
1348          * @since 1.21
1349          */
1350         public function setPreloadedContent( Content $content ) {
1351                 $this->mPreloadContent = $content;
1352         }
1353
1354         /**
1355          * Get the contents to be preloaded into the box, either set by
1356          * an earlier setPreloadText() or by loading the given page.
1357          *
1358          * @param string $preload Representing the title to preload from.
1359          * @param array $params Parameters to use (interface-message style) in the preloaded text
1360          *
1361          * @return Content
1362          *
1363          * @since 1.21
1364          */
1365         protected function getPreloadedContent( $preload, $params = [] ) {
1366                 if ( !empty( $this->mPreloadContent ) ) {
1367                         return $this->mPreloadContent;
1368                 }
1369
1370                 $handler = ContentHandler::getForModelID( $this->contentModel );
1371
1372                 if ( $preload === '' ) {
1373                         return $handler->makeEmptyContent();
1374                 }
1375
1376                 $user = $this->context->getUser();
1377                 $title = Title::newFromText( $preload );
1378                 # Check for existence to avoid getting MediaWiki:Noarticletext
1379                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1380                         // TODO: somehow show a warning to the user!
1381                         return $handler->makeEmptyContent();
1382                 }
1383
1384                 $page = WikiPage::factory( $title );
1385                 if ( $page->isRedirect() ) {
1386                         $title = $page->getRedirectTarget();
1387                         # Same as before
1388                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1389                                 // TODO: somehow show a warning to the user!
1390                                 return $handler->makeEmptyContent();
1391                         }
1392                         $page = WikiPage::factory( $title );
1393                 }
1394
1395                 $parserOptions = ParserOptions::newFromUser( $user );
1396                 $content = $page->getContent( Revision::RAW );
1397
1398                 if ( !$content ) {
1399                         // TODO: somehow show a warning to the user!
1400                         return $handler->makeEmptyContent();
1401                 }
1402
1403                 if ( $content->getModel() !== $handler->getModelID() ) {
1404                         $converted = $content->convert( $handler->getModelID() );
1405
1406                         if ( !$converted ) {
1407                                 // TODO: somehow show a warning to the user!
1408                                 wfDebug( "Attempt to preload incompatible content: " .
1409                                         "can't convert " . $content->getModel() .
1410                                         " to " . $handler->getModelID() );
1411
1412                                 return $handler->makeEmptyContent();
1413                         }
1414
1415                         $content = $converted;
1416                 }
1417
1418                 return $content->preloadTransform( $title, $parserOptions, $params );
1419         }
1420
1421         /**
1422          * Make sure the form isn't faking a user's credentials.
1423          *
1424          * @param WebRequest &$request
1425          * @return bool
1426          * @private
1427          */
1428         public function tokenOk( &$request ) {
1429                 $token = $request->getVal( 'wpEditToken' );
1430                 $user = $this->context->getUser();
1431                 $this->mTokenOk = $user->matchEditToken( $token );
1432                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1433                 return $this->mTokenOk;
1434         }
1435
1436         /**
1437          * Sets post-edit cookie indicating the user just saved a particular revision.
1438          *
1439          * This uses a temporary cookie for each revision ID so separate saves will never
1440          * interfere with each other.
1441          *
1442          * Article::view deletes the cookie on server-side after the redirect and
1443          * converts the value to the global JavaScript variable wgPostEdit.
1444          *
1445          * If the variable were set on the server, it would be cached, which is unwanted
1446          * since the post-edit state should only apply to the load right after the save.
1447          *
1448          * @param int $statusValue The status value (to check for new article status)
1449          */
1450         protected function setPostEditCookie( $statusValue ) {
1451                 $revisionId = $this->page->getLatest();
1452                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1453
1454                 $val = 'saved';
1455                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1456                         $val = 'created';
1457                 } elseif ( $this->oldid ) {
1458                         $val = 'restored';
1459                 }
1460
1461                 $response = $this->context->getRequest()->response();
1462                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1463         }
1464
1465         /**
1466          * Attempt submission
1467          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1468          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1469          * @return Status The resulting status object.
1470          */
1471         public function attemptSave( &$resultDetails = false ) {
1472                 # Allow bots to exempt some edits from bot flagging
1473                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1474                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1475
1476                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1477
1478                 return $status;
1479         }
1480
1481         /**
1482          * Log when a page was successfully saved after the edit conflict view
1483          */
1484         private function incrementResolvedConflicts() {
1485                 global $wgRequest;
1486
1487                 if ( $wgRequest->getText( 'mode' ) !== 'conflict' ) {
1488                         return;
1489                 }
1490
1491                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
1492                 $stats->increment( 'edit.failures.conflict.resolved' );
1493         }
1494
1495         /**
1496          * Handle status, such as after attempt save
1497          *
1498          * @param Status $status
1499          * @param array|bool $resultDetails
1500          *
1501          * @throws ErrorPageError
1502          * @return bool False, if output is done, true if rest of the form should be displayed
1503          */
1504         private function handleStatus( Status $status, $resultDetails ) {
1505                 /**
1506                  * @todo FIXME: once the interface for internalAttemptSave() is made
1507                  *   nicer, this should use the message in $status
1508                  */
1509                 if ( $status->value == self::AS_SUCCESS_UPDATE
1510                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1511                 ) {
1512                         $this->incrementResolvedConflicts();
1513
1514                         $this->didSave = true;
1515                         if ( !$resultDetails['nullEdit'] ) {
1516                                 $this->setPostEditCookie( $status->value );
1517                         }
1518                 }
1519
1520                 $out = $this->context->getOutput();
1521
1522                 // "wpExtraQueryRedirect" is a hidden input to modify
1523                 // after save URL and is not used by actual edit form
1524                 $request = $this->context->getRequest();
1525                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1526
1527                 switch ( $status->value ) {
1528                         case self::AS_HOOK_ERROR_EXPECTED:
1529                         case self::AS_CONTENT_TOO_BIG:
1530                         case self::AS_ARTICLE_WAS_DELETED:
1531                         case self::AS_CONFLICT_DETECTED:
1532                         case self::AS_SUMMARY_NEEDED:
1533                         case self::AS_TEXTBOX_EMPTY:
1534                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1535                         case self::AS_END:
1536                         case self::AS_BLANK_ARTICLE:
1537                         case self::AS_SELF_REDIRECT:
1538                                 return true;
1539
1540                         case self::AS_HOOK_ERROR:
1541                                 return false;
1542
1543                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1544                         case self::AS_PARSE_ERROR:
1545                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1546                                 return true;
1547
1548                         case self::AS_SUCCESS_NEW_ARTICLE:
1549                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1550                                 if ( $extraQueryRedirect ) {
1551                                         if ( $query === '' ) {
1552                                                 $query = $extraQueryRedirect;
1553                                         } else {
1554                                                 $query = $query . '&' . $extraQueryRedirect;
1555                                         }
1556                                 }
1557                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1558                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1559                                 return false;
1560
1561                         case self::AS_SUCCESS_UPDATE:
1562                                 $extraQuery = '';
1563                                 $sectionanchor = $resultDetails['sectionanchor'];
1564
1565                                 // Give extensions a chance to modify URL query on update
1566                                 Hooks::run(
1567                                         'ArticleUpdateBeforeRedirect',
1568                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1569                                 );
1570
1571                                 if ( $resultDetails['redirect'] ) {
1572                                         if ( $extraQuery == '' ) {
1573                                                 $extraQuery = 'redirect=no';
1574                                         } else {
1575                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1576                                         }
1577                                 }
1578                                 if ( $extraQueryRedirect ) {
1579                                         if ( $extraQuery === '' ) {
1580                                                 $extraQuery = $extraQueryRedirect;
1581                                         } else {
1582                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1583                                         }
1584                                 }
1585
1586                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1587                                 return false;
1588
1589                         case self::AS_SPAM_ERROR:
1590                                 $this->spamPageWithContent( $resultDetails['spam'] );
1591                                 return false;
1592
1593                         case self::AS_BLOCKED_PAGE_FOR_USER:
1594                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1595
1596                         case self::AS_IMAGE_REDIRECT_ANON:
1597                         case self::AS_IMAGE_REDIRECT_LOGGED:
1598                                 throw new PermissionsError( 'upload' );
1599
1600                         case self::AS_READ_ONLY_PAGE_ANON:
1601                         case self::AS_READ_ONLY_PAGE_LOGGED:
1602                                 throw new PermissionsError( 'edit' );
1603
1604                         case self::AS_READ_ONLY_PAGE:
1605                                 throw new ReadOnlyError;
1606
1607                         case self::AS_RATE_LIMITED:
1608                                 throw new ThrottledError();
1609
1610                         case self::AS_NO_CREATE_PERMISSION:
1611                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1612                                 throw new PermissionsError( $permission );
1613
1614                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1615                                 throw new PermissionsError( 'editcontentmodel' );
1616
1617                         default:
1618                                 // We don't recognize $status->value. The only way that can happen
1619                                 // is if an extension hook aborted from inside ArticleSave.
1620                                 // Render the status object into $this->hookError
1621                                 // FIXME this sucks, we should just use the Status object throughout
1622                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1623                                         '</div>';
1624                                 return true;
1625                 }
1626         }
1627
1628         /**
1629          * Run hooks that can filter edits just before they get saved.
1630          *
1631          * @param Content $content The Content to filter.
1632          * @param Status $status For reporting the outcome to the caller
1633          * @param User $user The user performing the edit
1634          *
1635          * @return bool
1636          */
1637         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1638                 // Run old style post-section-merge edit filter
1639                 if ( $this->hookError != '' ) {
1640                         # ...or the hook could be expecting us to produce an error
1641                         $status->fatal( 'hookaborted' );
1642                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1643                         return false;
1644                 }
1645
1646                 // Run new style post-section-merge edit filter
1647                 if ( !Hooks::run( 'EditFilterMergedContent',
1648                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1649                                 $user, $this->minoredit ] )
1650                 ) {
1651                         # Error messages etc. could be handled within the hook...
1652                         if ( $status->isGood() ) {
1653                                 $status->fatal( 'hookaborted' );
1654                                 // Not setting $this->hookError here is a hack to allow the hook
1655                                 // to cause a return to the edit page without $this->hookError
1656                                 // being set. This is used by ConfirmEdit to display a captcha
1657                                 // without any error message cruft.
1658                         } else {
1659                                 $this->hookError = $status->getWikiText();
1660                         }
1661                         // Use the existing $status->value if the hook set it
1662                         if ( !$status->value ) {
1663                                 $status->value = self::AS_HOOK_ERROR;
1664                         }
1665                         return false;
1666                 } elseif ( !$status->isOK() ) {
1667                         # ...or the hook could be expecting us to produce an error
1668                         // FIXME this sucks, we should just use the Status object throughout
1669                         $this->hookError = $status->getWikiText();
1670                         $status->fatal( 'hookaborted' );
1671                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1672                         return false;
1673                 }
1674
1675                 return true;
1676         }
1677
1678         /**
1679          * Return the summary to be used for a new section.
1680          *
1681          * @param string $sectionanchor Set to the section anchor text
1682          * @return string
1683          */
1684         private function newSectionSummary( &$sectionanchor = null ) {
1685                 global $wgParser;
1686
1687                 if ( $this->sectiontitle !== '' ) {
1688                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1689                         // If no edit summary was specified, create one automatically from the section
1690                         // title and have it link to the new section. Otherwise, respect the summary as
1691                         // passed.
1692                         if ( $this->summary === '' ) {
1693                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1694                                 return $this->context->msg( 'newsectionsummary' )
1695                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1696                         }
1697                 } elseif ( $this->summary !== '' ) {
1698                         $sectionanchor = $this->guessSectionName( $this->summary );
1699                         # This is a new section, so create a link to the new section
1700                         # in the revision summary.
1701                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1702                         return $this->context->msg( 'newsectionsummary' )
1703                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1704                 }
1705                 return $this->summary;
1706         }
1707
1708         /**
1709          * Attempt submission (no UI)
1710          *
1711          * @param array &$result Array to add statuses to, currently with the
1712          *   possible keys:
1713          *   - spam (string): Spam string from content if any spam is detected by
1714          *     matchSpamRegex.
1715          *   - sectionanchor (string): Section anchor for a section save.
1716          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1717          *     false otherwise.
1718          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1719          *     revision is a redirect.
1720          * @param bool $bot True if edit is being made under the bot right.
1721          *
1722          * @return Status Status object, possibly with a message, but always with
1723          *   one of the AS_* constants in $status->value,
1724          *
1725          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1726          *   various error display idiosyncrasies. There are also lots of cases
1727          *   where error metadata is set in the object and retrieved later instead
1728          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1729          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1730          * time.
1731          */
1732         public function internalAttemptSave( &$result, $bot = false ) {
1733                 global $wgRequest, $wgMaxArticleSize;
1734                 global $wgContentHandlerUseDB;
1735
1736                 $status = Status::newGood();
1737                 $user = $this->context->getUser();
1738
1739                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1740                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1741                         $status->fatal( 'hookaborted' );
1742                         $status->value = self::AS_HOOK_ERROR;
1743                         return $status;
1744                 }
1745
1746                 $spam = $wgRequest->getText( 'wpAntispam' );
1747                 if ( $spam !== '' ) {
1748                         wfDebugLog(
1749                                 'SimpleAntiSpam',
1750                                 $user->getName() .
1751                                 ' editing "' .
1752                                 $this->mTitle->getPrefixedText() .
1753                                 '" submitted bogus field "' .
1754                                 $spam .
1755                                 '"'
1756                         );
1757                         $status->fatal( 'spamprotectionmatch', false );
1758                         $status->value = self::AS_SPAM_ERROR;
1759                         return $status;
1760                 }
1761
1762                 try {
1763                         # Construct Content object
1764                         $textbox_content = $this->toEditContent( $this->textbox1 );
1765                 } catch ( MWContentSerializationException $ex ) {
1766                         $status->fatal(
1767                                 'content-failed-to-parse',
1768                                 $this->contentModel,
1769                                 $this->contentFormat,
1770                                 $ex->getMessage()
1771                         );
1772                         $status->value = self::AS_PARSE_ERROR;
1773                         return $status;
1774                 }
1775
1776                 # Check image redirect
1777                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1778                         $textbox_content->isRedirect() &&
1779                         !$user->isAllowed( 'upload' )
1780                 ) {
1781                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1782                                 $status->setResult( false, $code );
1783
1784                                 return $status;
1785                 }
1786
1787                 # Check for spam
1788                 $match = self::matchSummarySpamRegex( $this->summary );
1789                 if ( $match === false && $this->section == 'new' ) {
1790                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1791                         # regular summaries, it is added to the actual wikitext.
1792                         if ( $this->sectiontitle !== '' ) {
1793                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1794                                 $match = self::matchSpamRegex( $this->sectiontitle );
1795                         } else {
1796                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1797                                 # is used with the 'summary' parameter.
1798                                 $match = self::matchSpamRegex( $this->summary );
1799                         }
1800                 }
1801                 if ( $match === false ) {
1802                         $match = self::matchSpamRegex( $this->textbox1 );
1803                 }
1804                 if ( $match !== false ) {
1805                         $result['spam'] = $match;
1806                         $ip = $wgRequest->getIP();
1807                         $pdbk = $this->mTitle->getPrefixedDBkey();
1808                         $match = str_replace( "\n", '', $match );
1809                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1810                         $status->fatal( 'spamprotectionmatch', $match );
1811                         $status->value = self::AS_SPAM_ERROR;
1812                         return $status;
1813                 }
1814                 if ( !Hooks::run(
1815                         'EditFilter',
1816                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1817                 ) {
1818                         # Error messages etc. could be handled within the hook...
1819                         $status->fatal( 'hookaborted' );
1820                         $status->value = self::AS_HOOK_ERROR;
1821                         return $status;
1822                 } elseif ( $this->hookError != '' ) {
1823                         # ...or the hook could be expecting us to produce an error
1824                         $status->fatal( 'hookaborted' );
1825                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1826                         return $status;
1827                 }
1828
1829                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1830                         // Auto-block user's IP if the account was "hard" blocked
1831                         if ( !wfReadOnly() ) {
1832                                 $user->spreadAnyEditBlock();
1833                         }
1834                         # Check block state against master, thus 'false'.
1835                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1836                         return $status;
1837                 }
1838
1839                 $this->contentLength = strlen( $this->textbox1 );
1840                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1841                         // Error will be displayed by showEditForm()
1842                         $this->tooBig = true;
1843                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1844                         return $status;
1845                 }
1846
1847                 if ( !$user->isAllowed( 'edit' ) ) {
1848                         if ( $user->isAnon() ) {
1849                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1850                                 return $status;
1851                         } else {
1852                                 $status->fatal( 'readonlytext' );
1853                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1854                                 return $status;
1855                         }
1856                 }
1857
1858                 $changingContentModel = false;
1859                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1860                         if ( !$wgContentHandlerUseDB ) {
1861                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1862                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1863                                 return $status;
1864                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1865                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1866                                 return $status;
1867                         }
1868                         // Make sure the user can edit the page under the new content model too
1869                         $titleWithNewContentModel = clone $this->mTitle;
1870                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1871                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1872                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1873                         ) {
1874                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1875                                 return $status;
1876                         }
1877
1878                         $changingContentModel = true;
1879                         $oldContentModel = $this->mTitle->getContentModel();
1880                 }
1881
1882                 if ( $this->changeTags ) {
1883                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1884                                 $this->changeTags, $user );
1885                         if ( !$changeTagsStatus->isOK() ) {
1886                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1887                                 return $changeTagsStatus;
1888                         }
1889                 }
1890
1891                 if ( wfReadOnly() ) {
1892                         $status->fatal( 'readonlytext' );
1893                         $status->value = self::AS_READ_ONLY_PAGE;
1894                         return $status;
1895                 }
1896                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1897                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1898                 ) {
1899                         $status->fatal( 'actionthrottledtext' );
1900                         $status->value = self::AS_RATE_LIMITED;
1901                         return $status;
1902                 }
1903
1904                 # If the article has been deleted while editing, don't save it without
1905                 # confirmation
1906                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1907                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1908                         return $status;
1909                 }
1910
1911                 # Load the page data from the master. If anything changes in the meantime,
1912                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1913                 $this->page->loadPageData( 'fromdbmaster' );
1914                 $new = !$this->page->exists();
1915
1916                 if ( $new ) {
1917                         // Late check for create permission, just in case *PARANOIA*
1918                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
1919                                 $status->fatal( 'nocreatetext' );
1920                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1921                                 wfDebug( __METHOD__ . ": no create permission\n" );
1922                                 return $status;
1923                         }
1924
1925                         // Don't save a new page if it's blank or if it's a MediaWiki:
1926                         // message with content equivalent to default (allow empty pages
1927                         // in this case to disable messages, see T52124)
1928                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1929                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1930                                 $defaultText = $defaultMessageText;
1931                         } else {
1932                                 $defaultText = '';
1933                         }
1934
1935                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1936                                 $this->blankArticle = true;
1937                                 $status->fatal( 'blankarticle' );
1938                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1939                                 return $status;
1940                         }
1941
1942                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
1943                                 return $status;
1944                         }
1945
1946                         $content = $textbox_content;
1947
1948                         $result['sectionanchor'] = '';
1949                         if ( $this->section == 'new' ) {
1950                                 if ( $this->sectiontitle !== '' ) {
1951                                         // Insert the section title above the content.
1952                                         $content = $content->addSectionHeader( $this->sectiontitle );
1953                                 } elseif ( $this->summary !== '' ) {
1954                                         // Insert the section title above the content.
1955                                         $content = $content->addSectionHeader( $this->summary );
1956                                 }
1957                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1958                         }
1959
1960                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1961
1962                 } else { # not $new
1963
1964                         # Article exists. Check for edit conflict.
1965
1966                         $this->page->clear(); # Force reload of dates, etc.
1967                         $timestamp = $this->page->getTimestamp();
1968                         $latest = $this->page->getLatest();
1969
1970                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1971
1972                         // Check editRevId if set, which handles same-second timestamp collisions
1973                         if ( $timestamp != $this->edittime
1974                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1975                         ) {
1976                                 $this->isConflict = true;
1977                                 if ( $this->section == 'new' ) {
1978                                         if ( $this->page->getUserText() == $user->getName() &&
1979                                                 $this->page->getComment() == $this->newSectionSummary()
1980                                         ) {
1981                                                 // Probably a duplicate submission of a new comment.
1982                                                 // This can happen when CDN resends a request after
1983                                                 // a timeout but the first one actually went through.
1984                                                 wfDebug( __METHOD__
1985                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1986                                         } else {
1987                                                 // New comment; suppress conflict.
1988                                                 $this->isConflict = false;
1989                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1990                                         }
1991                                 } elseif ( $this->section == ''
1992                                         && Revision::userWasLastToEdit(
1993                                                 DB_MASTER, $this->mTitle->getArticleID(),
1994                                                 $user->getId(), $this->edittime
1995                                         )
1996                                 ) {
1997                                         # Suppress edit conflict with self, except for section edits where merging is required.
1998                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1999                                         $this->isConflict = false;
2000                                 }
2001                         }
2002
2003                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2004                         if ( $this->sectiontitle !== '' ) {
2005                                 $sectionTitle = $this->sectiontitle;
2006                         } else {
2007                                 $sectionTitle = $this->summary;
2008                         }
2009
2010                         $content = null;
2011
2012                         if ( $this->isConflict ) {
2013                                 wfDebug( __METHOD__
2014                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2015                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2016                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2017                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2018                                 if ( $this->editRevId !== null ) {
2019                                         $content = $this->page->replaceSectionAtRev(
2020                                                 $this->section,
2021                                                 $textbox_content,
2022                                                 $sectionTitle,
2023                                                 $this->editRevId
2024                                         );
2025                                 } else {
2026                                         $content = $this->page->replaceSectionContent(
2027                                                 $this->section,
2028                                                 $textbox_content,
2029                                                 $sectionTitle,
2030                                                 $this->edittime
2031                                         );
2032                                 }
2033                         } else {
2034                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2035                                 $content = $this->page->replaceSectionContent(
2036                                         $this->section,
2037                                         $textbox_content,
2038                                         $sectionTitle
2039                                 );
2040                         }
2041
2042                         if ( is_null( $content ) ) {
2043                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2044                                 $this->isConflict = true;
2045                                 $content = $textbox_content; // do not try to merge here!
2046                         } elseif ( $this->isConflict ) {
2047                                 # Attempt merge
2048                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2049                                         // Successful merge! Maybe we should tell the user the good news?
2050                                         $this->isConflict = false;
2051                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2052                                 } else {
2053                                         $this->section = '';
2054                                         $this->textbox1 = ContentHandler::getContentText( $content );
2055                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2056                                 }
2057                         }
2058
2059                         if ( $this->isConflict ) {
2060                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2061                                 return $status;
2062                         }
2063
2064                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2065                                 return $status;
2066                         }
2067
2068                         if ( $this->section == 'new' ) {
2069                                 // Handle the user preference to force summaries here
2070                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2071                                         $this->missingSummary = true;
2072                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2073                                         $status->value = self::AS_SUMMARY_NEEDED;
2074                                         return $status;
2075                                 }
2076
2077                                 // Do not allow the user to post an empty comment
2078                                 if ( $this->textbox1 == '' ) {
2079                                         $this->missingComment = true;
2080                                         $status->fatal( 'missingcommenttext' );
2081                                         $status->value = self::AS_TEXTBOX_EMPTY;
2082                                         return $status;
2083                                 }
2084                         } elseif ( !$this->allowBlankSummary
2085                                 && !$content->equals( $this->getOriginalContent( $user ) )
2086                                 && !$content->isRedirect()
2087                                 && md5( $this->summary ) == $this->autoSumm
2088                         ) {
2089                                 $this->missingSummary = true;
2090                                 $status->fatal( 'missingsummary' );
2091                                 $status->value = self::AS_SUMMARY_NEEDED;
2092                                 return $status;
2093                         }
2094
2095                         # All's well
2096                         $sectionanchor = '';
2097                         if ( $this->section == 'new' ) {
2098                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2099                         } elseif ( $this->section != '' ) {
2100                                 # Try to get a section anchor from the section source, redirect
2101                                 # to edited section if header found.
2102                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2103                                 # for duplicate heading checking and maybe parsing.
2104                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2105                                 # We can't deal with anchors, includes, html etc in the header for now,
2106                                 # headline would need to be parsed to improve this.
2107                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2108                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2109                                 }
2110                         }
2111                         $result['sectionanchor'] = $sectionanchor;
2112
2113                         // Save errors may fall down to the edit form, but we've now
2114                         // merged the section into full text. Clear the section field
2115                         // so that later submission of conflict forms won't try to
2116                         // replace that into a duplicated mess.
2117                         $this->textbox1 = $this->toEditText( $content );
2118                         $this->section = '';
2119
2120                         $status->value = self::AS_SUCCESS_UPDATE;
2121                 }
2122
2123                 if ( !$this->allowSelfRedirect
2124                         && $content->isRedirect()
2125                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2126                 ) {
2127                         // If the page already redirects to itself, don't warn.
2128                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2129                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2130                                 $this->selfRedirect = true;
2131                                 $status->fatal( 'selfredirect' );
2132                                 $status->value = self::AS_SELF_REDIRECT;
2133                                 return $status;
2134                         }
2135                 }
2136
2137                 // Check for length errors again now that the section is merged in
2138                 $this->contentLength = strlen( $this->toEditText( $content ) );
2139                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2140                         $this->tooBig = true;
2141                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2142                         return $status;
2143                 }
2144
2145                 $flags = EDIT_AUTOSUMMARY |
2146                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2147                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2148                         ( $bot ? EDIT_FORCE_BOT : 0 );
2149
2150                 $doEditStatus = $this->page->doEditContent(
2151                         $content,
2152                         $this->summary,
2153                         $flags,
2154                         false,
2155                         $user,
2156                         $content->getDefaultFormat(),
2157                         $this->changeTags,
2158                         $this->undidRev
2159                 );
2160
2161                 if ( !$doEditStatus->isOK() ) {
2162                         // Failure from doEdit()
2163                         // Show the edit conflict page for certain recognized errors from doEdit(),
2164                         // but don't show it for errors from extension hooks
2165                         $errors = $doEditStatus->getErrorsArray();
2166                         if ( in_array( $errors[0][0],
2167                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2168                         ) {
2169                                 $this->isConflict = true;
2170                                 // Destroys data doEdit() put in $status->value but who cares
2171                                 $doEditStatus->value = self::AS_END;
2172                         }
2173                         return $doEditStatus;
2174                 }
2175
2176                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2177                 if ( $result['nullEdit'] ) {
2178                         // We don't know if it was a null edit until now, so increment here
2179                         $user->pingLimiter( 'linkpurge' );
2180                 }
2181                 $result['redirect'] = $content->isRedirect();
2182
2183                 $this->updateWatchlist();
2184
2185                 // If the content model changed, add a log entry
2186                 if ( $changingContentModel ) {
2187                         $this->addContentModelChangeLogEntry(
2188                                 $user,
2189                                 $new ? false : $oldContentModel,
2190                                 $this->contentModel,
2191                                 $this->summary
2192                         );
2193                 }
2194
2195                 return $status;
2196         }
2197
2198         /**
2199          * @param User $user
2200          * @param string|false $oldModel false if the page is being newly created
2201          * @param string $newModel
2202          * @param string $reason
2203          */
2204         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2205                 $new = $oldModel === false;
2206                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2207                 $log->setPerformer( $user );
2208                 $log->setTarget( $this->mTitle );
2209                 $log->setComment( $reason );
2210                 $log->setParameters( [
2211                         '4::oldmodel' => $oldModel,
2212                         '5::newmodel' => $newModel
2213                 ] );
2214                 $logid = $log->insert();
2215                 $log->publish( $logid );
2216         }
2217
2218         /**
2219          * Register the change of watch status
2220          */
2221         protected function updateWatchlist() {
2222                 $user = $this->context->getUser();
2223                 if ( !$user->isLoggedIn() ) {
2224                         return;
2225                 }
2226
2227                 $title = $this->mTitle;
2228                 $watch = $this->watchthis;
2229                 // Do this in its own transaction to reduce contention...
2230                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2231                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2232                                 return; // nothing to change
2233                         }
2234                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2235                 } );
2236         }
2237
2238         /**
2239          * Attempts to do 3-way merge of edit content with a base revision
2240          * and current content, in case of edit conflict, in whichever way appropriate
2241          * for the content type.
2242          *
2243          * @since 1.21
2244          *
2245          * @param Content $editContent
2246          *
2247          * @return bool
2248          */
2249         private function mergeChangesIntoContent( &$editContent ) {
2250                 $db = wfGetDB( DB_MASTER );
2251
2252                 // This is the revision the editor started from
2253                 $baseRevision = $this->getBaseRevision();
2254                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2255
2256                 if ( is_null( $baseContent ) ) {
2257                         return false;
2258                 }
2259
2260                 // The current state, we want to merge updates into it
2261                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2262                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2263
2264                 if ( is_null( $currentContent ) ) {
2265                         return false;
2266                 }
2267
2268                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2269
2270                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2271
2272                 if ( $result ) {
2273                         $editContent = $result;
2274                         // Update parentRevId to what we just merged.
2275                         $this->parentRevId = $currentRevision->getId();
2276                         return true;
2277                 }
2278
2279                 return false;
2280         }
2281
2282         /**
2283          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2284          *        one might think of X as the "base revision", which is NOT what this returns.
2285          * @return Revision Current version when the edit was started
2286          */
2287         public function getBaseRevision() {
2288                 if ( !$this->mBaseRevision ) {
2289                         $db = wfGetDB( DB_MASTER );
2290                         $this->mBaseRevision = $this->editRevId
2291                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2292                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2293                 }
2294                 return $this->mBaseRevision;
2295         }
2296
2297         /**
2298          * Check given input text against $wgSpamRegex, and return the text of the first match.
2299          *
2300          * @param string $text
2301          *
2302          * @return string|bool Matching string or false
2303          */
2304         public static function matchSpamRegex( $text ) {
2305                 global $wgSpamRegex;
2306                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2307                 $regexes = (array)$wgSpamRegex;
2308                 return self::matchSpamRegexInternal( $text, $regexes );
2309         }
2310
2311         /**
2312          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2313          *
2314          * @param string $text
2315          *
2316          * @return string|bool Matching string or false
2317          */
2318         public static function matchSummarySpamRegex( $text ) {
2319                 global $wgSummarySpamRegex;
2320                 $regexes = (array)$wgSummarySpamRegex;
2321                 return self::matchSpamRegexInternal( $text, $regexes );
2322         }
2323
2324         /**
2325          * @param string $text
2326          * @param array $regexes
2327          * @return bool|string
2328          */
2329         protected static function matchSpamRegexInternal( $text, $regexes ) {
2330                 foreach ( $regexes as $regex ) {
2331                         $matches = [];
2332                         if ( preg_match( $regex, $text, $matches ) ) {
2333                                 return $matches[0];
2334                         }
2335                 }
2336                 return false;
2337         }
2338
2339         public function setHeaders() {
2340                 global $wgAjaxEditStash;
2341
2342                 $out = $this->context->getOutput();
2343
2344                 $out->addModules( 'mediawiki.action.edit' );
2345                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2346
2347                 $user = $this->context->getUser();
2348                 if ( $user->getOption( 'showtoolbar' ) ) {
2349                         // The addition of default buttons is handled by getEditToolbar() which
2350                         // has its own dependency on this module. The call here ensures the module
2351                         // is loaded in time (it has position "top") for other modules to register
2352                         // buttons (e.g. extensions, gadgets, user scripts).
2353                         $out->addModules( 'mediawiki.toolbar' );
2354                 }
2355
2356                 if ( $user->getOption( 'uselivepreview' ) ) {
2357                         $out->addModules( 'mediawiki.action.edit.preview' );
2358                 }
2359
2360                 if ( $user->getOption( 'useeditwarning' ) ) {
2361                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2362                 }
2363
2364                 # Enabled article-related sidebar, toplinks, etc.
2365                 $out->setArticleRelated( true );
2366
2367                 $contextTitle = $this->getContextTitle();
2368                 if ( $this->isConflict ) {
2369                         $msg = 'editconflict';
2370                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2371                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2372                 } else {
2373                         $msg = $contextTitle->exists()
2374                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2375                                         && $contextTitle->getDefaultMessageText() !== false
2376                                 )
2377                                 ? 'editing'
2378                                 : 'creating';
2379                 }
2380
2381                 # Use the title defined by DISPLAYTITLE magic word when present
2382                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2383                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2384                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2385                 if ( $displayTitle === false ) {
2386                         $displayTitle = $contextTitle->getPrefixedText();
2387                 }
2388                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2389                 # Transmit the name of the message to JavaScript for live preview
2390                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2391                 $out->addJsConfigVars( [
2392                         'wgEditMessage' => $msg,
2393                         'wgAjaxEditStash' => $wgAjaxEditStash,
2394                 ] );
2395         }
2396
2397         /**
2398          * Show all applicable editing introductions
2399          */
2400         protected function showIntro() {
2401                 if ( $this->suppressIntro ) {
2402                         return;
2403                 }
2404
2405                 $out = $this->context->getOutput();
2406                 $namespace = $this->mTitle->getNamespace();
2407
2408                 if ( $namespace == NS_MEDIAWIKI ) {
2409                         # Show a warning if editing an interface message
2410                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2411                         # If this is a default message (but not css or js),
2412                         # show a hint that it is translatable on translatewiki.net
2413                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2414                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2415                         ) {
2416                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2417                                 if ( $defaultMessageText !== false ) {
2418                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2419                                                 'translateinterface' );
2420                                 }
2421                         }
2422                 } elseif ( $namespace == NS_FILE ) {
2423                         # Show a hint to shared repo
2424                         $file = wfFindFile( $this->mTitle );
2425                         if ( $file && !$file->isLocal() ) {
2426                                 $descUrl = $file->getDescriptionUrl();
2427                                 # there must be a description url to show a hint to shared repo
2428                                 if ( $descUrl ) {
2429                                         if ( !$this->mTitle->exists() ) {
2430                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2431                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2432                                                 ] );
2433                                         } else {
2434                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2435                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2436                                                 ] );
2437                                         }
2438                                 }
2439                         }
2440                 }
2441
2442                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2443                 # Show log extract when the user is currently blocked
2444                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2445                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2446                         $user = User::newFromName( $username, false /* allow IP users */ );
2447                         $ip = User::isIP( $username );
2448                         $block = Block::newFromTarget( $user, $user );
2449                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2450                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2451                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2452                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2453                                 # Show log extract if the user is currently blocked
2454                                 LogEventsList::showLogExtract(
2455                                         $out,
2456                                         'block',
2457                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2458                                         '',
2459                                         [
2460                                                 'lim' => 1,
2461                                                 'showIfEmpty' => false,
2462                                                 'msgKey' => [
2463                                                         'blocked-notice-logextract',
2464                                                         $user->getName() # Support GENDER in notice
2465                                                 ]
2466                                         ]
2467                                 );
2468                         }
2469                 }
2470                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2471                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2472                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2473                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2474                         ) );
2475                         if ( $this->context->getUser()->isLoggedIn() ) {
2476                                 $out->wrapWikiMsg(
2477                                         // Suppress the external link icon, consider the help url an internal one
2478                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2479                                         [
2480                                                 'newarticletext',
2481                                                 $helpLink
2482                                         ]
2483                                 );
2484                         } else {
2485                                 $out->wrapWikiMsg(
2486                                         // Suppress the external link icon, consider the help url an internal one
2487                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2488                                         [
2489                                                 'newarticletextanon',
2490                                                 $helpLink
2491                                         ]
2492                                 );
2493                         }
2494                 }
2495                 # Give a notice if the user is editing a deleted/moved page...
2496                 if ( !$this->mTitle->exists() ) {
2497                         $dbr = wfGetDB( DB_REPLICA );
2498
2499                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2500                                 '',
2501                                 [
2502                                         'lim' => 10,
2503                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2504                                         'showIfEmpty' => false,
2505                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2506                                 ]
2507                         );
2508                 }
2509         }
2510
2511         /**
2512          * Attempt to show a custom editing introduction, if supplied
2513          *
2514          * @return bool
2515          */
2516         protected function showCustomIntro() {
2517                 if ( $this->editintro ) {
2518                         $title = Title::newFromText( $this->editintro );
2519                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2520                                 // Added using template syntax, to take <noinclude>'s into account.
2521                                 $this->context->getOutput()->addWikiTextTitleTidy(
2522                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2523                                         $this->mTitle
2524                                 );
2525                                 return true;
2526                         }
2527                 }
2528                 return false;
2529         }
2530
2531         /**
2532          * Gets an editable textual representation of $content.
2533          * The textual representation can be turned by into a Content object by the
2534          * toEditContent() method.
2535          *
2536          * If $content is null or false or a string, $content is returned unchanged.
2537          *
2538          * If the given Content object is not of a type that can be edited using
2539          * the text base EditPage, an exception will be raised. Set
2540          * $this->allowNonTextContent to true to allow editing of non-textual
2541          * content.
2542          *
2543          * @param Content|null|bool|string $content
2544          * @return string The editable text form of the content.
2545          *
2546          * @throws MWException If $content is not an instance of TextContent and
2547          *   $this->allowNonTextContent is not true.
2548          */
2549         protected function toEditText( $content ) {
2550                 if ( $content === null || $content === false || is_string( $content ) ) {
2551                         return $content;
2552                 }
2553
2554                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2555                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2556                 }
2557
2558                 return $content->serialize( $this->contentFormat );
2559         }
2560
2561         /**
2562          * Turns the given text into a Content object by unserializing it.
2563          *
2564          * If the resulting Content object is not of a type that can be edited using
2565          * the text base EditPage, an exception will be raised. Set
2566          * $this->allowNonTextContent to true to allow editing of non-textual
2567          * content.
2568          *
2569          * @param string|null|bool $text Text to unserialize
2570          * @return Content|bool|null The content object created from $text. If $text was false
2571          *   or null, false resp. null will be  returned instead.
2572          *
2573          * @throws MWException If unserializing the text results in a Content
2574          *   object that is not an instance of TextContent and
2575          *   $this->allowNonTextContent is not true.
2576          */
2577         protected function toEditContent( $text ) {
2578                 if ( $text === false || $text === null ) {
2579                         return $text;
2580                 }
2581
2582                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2583                         $this->contentModel, $this->contentFormat );
2584
2585                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2586                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2587                 }
2588
2589                 return $content;
2590         }
2591
2592         /**
2593          * Send the edit form and related headers to OutputPage
2594          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2595          *     during form output near the top, for captchas and the like.
2596          *
2597          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2598          * use the EditPage::showEditForm:fields hook instead.
2599          */
2600         public function showEditForm( $formCallback = null ) {
2601                 # need to parse the preview early so that we know which templates are used,
2602                 # otherwise users with "show preview after edit box" will get a blank list
2603                 # we parse this near the beginning so that setHeaders can do the title
2604                 # setting work instead of leaving it in getPreviewText
2605                 $previewOutput = '';
2606                 if ( $this->formtype == 'preview' ) {
2607                         $previewOutput = $this->getPreviewText();
2608                 }
2609
2610                 $out = $this->context->getOutput();
2611
2612                 // Avoid PHP 7.1 warning of passing $this by reference
2613                 $editPage = $this;
2614                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2615
2616                 $this->setHeaders();
2617
2618                 $this->addTalkPageText();
2619                 $this->addEditNotices();
2620
2621                 if ( !$this->isConflict &&
2622                         $this->section != '' &&
2623                         !$this->isSectionEditSupported() ) {
2624                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2625                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2626                         // Someone is welcome to try refactoring though
2627                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2628                         return;
2629                 }
2630
2631                 $this->showHeader();
2632
2633                 $out->addHTML( $this->editFormPageTop );
2634
2635                 $user = $this->context->getUser();
2636                 if ( $user->getOption( 'previewontop' ) ) {
2637                         $this->displayPreviewArea( $previewOutput, true );
2638                 }
2639
2640                 $out->addHTML( $this->editFormTextTop );
2641
2642                 $showToolbar = true;
2643                 if ( $this->wasDeletedSinceLastEdit() ) {
2644                         if ( $this->formtype == 'save' ) {
2645                                 // Hide the toolbar and edit area, user can click preview to get it back
2646                                 // Add an confirmation checkbox and explanation.
2647                                 $showToolbar = false;
2648                         } else {
2649                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2650                                         'deletedwhileediting' );
2651                         }
2652                 }
2653
2654                 // @todo add EditForm plugin interface and use it here!
2655                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2656                 $out->addHTML( Html::openElement(
2657                         'form',
2658                         [
2659                                 'class' => 'mw-editform',
2660                                 'id' => self::EDITFORM_ID,
2661                                 'name' => self::EDITFORM_ID,
2662                                 'method' => 'post',
2663                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2664                                 'enctype' => 'multipart/form-data'
2665                         ]
2666                 ) );
2667
2668                 if ( is_callable( $formCallback ) ) {
2669                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2670                         call_user_func_array( $formCallback, [ &$out ] );
2671                 }
2672
2673                 // Add an empty field to trip up spambots
2674                 $out->addHTML(
2675                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2676                         . Html::rawElement(
2677                                 'label',
2678                                 [ 'for' => 'wpAntispam' ],
2679                                 $this->context->msg( 'simpleantispam-label' )->parse()
2680                         )
2681                         . Xml::element(
2682                                 'input',
2683                                 [
2684                                         'type' => 'text',
2685                                         'name' => 'wpAntispam',
2686                                         'id' => 'wpAntispam',
2687                                         'value' => ''
2688                                 ]
2689                         )
2690                         . Xml::closeElement( 'div' )
2691                 );
2692
2693                 // Avoid PHP 7.1 warning of passing $this by reference
2694                 $editPage = $this;
2695                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2696
2697                 // Put these up at the top to ensure they aren't lost on early form submission
2698                 $this->showFormBeforeText();
2699
2700                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2701                         $username = $this->lastDelete->user_name;
2702                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2703
2704                         // It is better to not parse the comment at all than to have templates expanded in the middle
2705                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2706                         $key = $comment === ''
2707                                 ? 'confirmrecreate-noreason'
2708                                 : 'confirmrecreate';
2709                         $out->addHTML(
2710                                 '<div class="mw-confirm-recreate">' .
2711                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2712                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2713                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2714                                 ) .
2715                                 '</div>'
2716                         );
2717                 }
2718
2719                 # When the summary is hidden, also hide them on preview/show changes
2720                 if ( $this->nosummary ) {
2721                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2722                 }
2723
2724                 # If a blank edit summary was previously provided, and the appropriate
2725                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2726                 # user being bounced back more than once in the event that a summary
2727                 # is not required.
2728                 # ####
2729                 # For a bit more sophisticated detection of blank summaries, hash the
2730                 # automatic one and pass that in the hidden field wpAutoSummary.
2731                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2732                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2733                 }
2734
2735                 if ( $this->undidRev ) {
2736                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2737                 }
2738
2739                 if ( $this->selfRedirect ) {
2740                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2741                 }
2742
2743                 if ( $this->hasPresetSummary ) {
2744                         // If a summary has been preset using &summary= we don't want to prompt for
2745                         // a different summary. Only prompt for a summary if the summary is blanked.
2746                         // (T19416)
2747                         $this->autoSumm = md5( '' );
2748                 }
2749
2750                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2751                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2752
2753                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2754                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2755
2756                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2757                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2758
2759                 $out->enableOOUI();
2760
2761                 if ( $this->section == 'new' ) {
2762                         $this->showSummaryInput( true, $this->summary );
2763                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2764                 }
2765
2766                 $out->addHTML( $this->editFormTextBeforeContent );
2767
2768                 if ( !$this->isCssJsSubpage && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2769                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2770                 }
2771
2772                 if ( $this->blankArticle ) {
2773                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2774                 }
2775
2776                 if ( $this->isConflict ) {
2777                         // In an edit conflict bypass the overridable content form method
2778                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2779                         // resolved between page source edits and custom ui edits using the
2780                         // custom edit ui.
2781                         $this->textbox2 = $this->textbox1;
2782
2783                         $content = $this->getCurrentContent();
2784                         $this->textbox1 = $this->toEditText( $content );
2785
2786                         $this->showTextbox1();
2787                 } else {
2788                         $this->showContentForm();
2789                 }
2790
2791                 $out->addHTML( $this->editFormTextAfterContent );
2792
2793                 $this->showStandardInputs();
2794
2795                 $this->showFormAfterText();
2796
2797                 $this->showTosSummary();
2798
2799                 $this->showEditTools();
2800
2801                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2802
2803                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2804
2805                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2806                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2807
2808                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2809                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2810
2811                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2812
2813                 if ( $this->isConflict ) {
2814                         try {
2815                                 $this->showConflict();
2816                         } catch ( MWContentSerializationException $ex ) {
2817                                 // this can't really happen, but be nice if it does.
2818                                 $msg = $this->context->msg(
2819                                         'content-failed-to-parse',
2820                                         $this->contentModel,
2821                                         $this->contentFormat,
2822                                         $ex->getMessage()
2823                                 );
2824                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2825                         }
2826                 }
2827
2828                 // Set a hidden field so JS knows what edit form mode we are in
2829                 if ( $this->isConflict ) {
2830                         $mode = 'conflict';
2831                 } elseif ( $this->preview ) {
2832                         $mode = 'preview';
2833                 } elseif ( $this->diff ) {
2834                         $mode = 'diff';
2835                 } else {
2836                         $mode = 'text';
2837                 }
2838                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2839
2840                 // Marker for detecting truncated form data.  This must be the last
2841                 // parameter sent in order to be of use, so do not move me.
2842                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2843                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2844
2845                 if ( !$user->getOption( 'previewontop' ) ) {
2846                         $this->displayPreviewArea( $previewOutput, false );
2847                 }
2848         }
2849
2850         /**
2851          * Wrapper around TemplatesOnThisPageFormatter to make
2852          * a "templates on this page" list.
2853          *
2854          * @param Title[] $templates
2855          * @return string HTML
2856          */
2857         public function makeTemplatesOnThisPageList( array $templates ) {
2858                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2859                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2860                 );
2861
2862                 // preview if preview, else section if section, else false
2863                 $type = false;
2864                 if ( $this->preview ) {
2865                         $type = 'preview';
2866                 } elseif ( $this->section != '' ) {
2867                         $type = 'section';
2868                 }
2869
2870                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2871                         $templateListFormatter->format( $templates, $type )
2872                 );
2873         }
2874
2875         /**
2876          * Extract the section title from current section text, if any.
2877          *
2878          * @param string $text
2879          * @return string|bool String or false
2880          */
2881         public static function extractSectionTitle( $text ) {
2882                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2883                 if ( !empty( $matches[2] ) ) {
2884                         global $wgParser;
2885                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2886                 } else {
2887                         return false;
2888                 }
2889         }
2890
2891         protected function showHeader() {
2892                 global $wgAllowUserCss, $wgAllowUserJs;
2893
2894                 $out = $this->context->getOutput();
2895                 $user = $this->context->getUser();
2896                 if ( $this->isConflict ) {
2897                         $this->addExplainConflictHeader( $out );
2898                         $this->editRevId = $this->page->getLatest();
2899                 } else {
2900                         if ( $this->section != '' && $this->section != 'new' ) {
2901                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2902                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2903                                         if ( $sectionTitle !== false ) {
2904                                                 $this->summary = "/* $sectionTitle */ ";
2905                                         }
2906                                 }
2907                         }
2908
2909                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
2910
2911                         if ( $this->missingComment ) {
2912                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2913                         }
2914
2915                         if ( $this->missingSummary && $this->section != 'new' ) {
2916                                 $out->wrapWikiMsg(
2917                                         "<div id='mw-missingsummary'>\n$1\n</div>",
2918                                         [ 'missingsummary', $buttonLabel ]
2919                                 );
2920                         }
2921
2922                         if ( $this->missingSummary && $this->section == 'new' ) {
2923                                 $out->wrapWikiMsg(
2924                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
2925                                         [ 'missingcommentheader', $buttonLabel ]
2926                                 );
2927                         }
2928
2929                         if ( $this->blankArticle ) {
2930                                 $out->wrapWikiMsg(
2931                                         "<div id='mw-blankarticle'>\n$1\n</div>",
2932                                         [ 'blankarticle', $buttonLabel ]
2933                                 );
2934                         }
2935
2936                         if ( $this->selfRedirect ) {
2937                                 $out->wrapWikiMsg(
2938                                         "<div id='mw-selfredirect'>\n$1\n</div>",
2939                                         [ 'selfredirect', $buttonLabel ]
2940                                 );
2941                         }
2942
2943                         if ( $this->hookError !== '' ) {
2944                                 $out->addWikiText( $this->hookError );
2945                         }
2946
2947                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2948                                 $out->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, $user ) ) {
2957                                                 $out->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                                                 $out->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                                                 $out->addWikiMsg( 'editingold' );
2971                                                 $this->isOldRev = true;
2972                                         }
2973                                 } elseif ( $this->mTitle->exists() ) {
2974                                         // Something went wrong
2975
2976                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2977                                                 [ 'missing-revision', $this->oldid ] );
2978                                 }
2979                         }
2980                 }
2981
2982                 if ( wfReadOnly() ) {
2983                         $out->wrapWikiMsg(
2984                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2985                                 [ 'readonlywarning', wfReadOnlyReason() ]
2986                         );
2987                 } elseif ( $user->isAnon() ) {
2988                         if ( $this->formtype != 'preview' ) {
2989                                 $out->wrapWikiMsg(
2990                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2991                                         [ 'anoneditwarning',
2992                                                 // Log-in link
2993                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2994                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2995                                                 ] ),
2996                                                 // Sign-up link
2997                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2998                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2999                                                 ] )
3000                                         ]
3001                                 );
3002                         } else {
3003                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3004                                         'anonpreviewwarning'
3005                                 );
3006                         }
3007                 } else {
3008                         if ( $this->isCssJsSubpage ) {
3009                                 # Check the skin exists
3010                                 if ( $this->isWrongCaseCssJsPage ) {
3011                                         $out->wrapWikiMsg(
3012                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3013                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3014                                         );
3015                                 }
3016                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3017                                         $out->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3018                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3019                                         );
3020                                         if ( $this->formtype !== 'preview' ) {
3021                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3022                                                         $out->wrapWikiMsg(
3023                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3024                                                                 [ 'usercssyoucanpreview' ]
3025                                                         );
3026                                                 }
3027
3028                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3029                                                         $out->wrapWikiMsg(
3030                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3031                                                                 [ 'userjsyoucanpreview' ]
3032                                                         );
3033                                                 }
3034                                         }
3035                                 }
3036                         }
3037                 }
3038
3039                 $this->addPageProtectionWarningHeaders();
3040
3041                 $this->addLongPageWarningHeader();
3042
3043                 # Add header copyright warning
3044                 $this->showHeaderCopyrightWarning();
3045         }
3046
3047         /**
3048          * Helper function for summary input functions, which returns the neccessary
3049          * attributes for the input.
3050          *
3051          * @param array|null $inputAttrs Array of attrs to use on the input
3052          * @return array
3053          */
3054         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3055                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3056                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3057                         'id' => 'wpSummary',
3058                         'name' => 'wpSummary',
3059                         'maxlength' => '200',
3060                         'tabindex' => 1,
3061                         'size' => 60,
3062                         'spellcheck' => 'true',
3063                 ];
3064         }
3065
3066         /**
3067          * Standard summary input and label (wgSummary), abstracted so EditPage
3068          * subclasses may reorganize the form.
3069          * Note that you do not need to worry about the label's for=, it will be
3070          * inferred by the id given to the input. You can remove them both by
3071          * passing [ 'id' => false ] to $userInputAttrs.
3072          *
3073          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3074          * @param string $summary The value of the summary input
3075          * @param string $labelText The html to place inside the label
3076          * @param array $inputAttrs Array of attrs to use on the input
3077          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3078          * @return array An array in the format [ $label, $input ]
3079          */
3080         public function getSummaryInput( $summary = "", $labelText = null,
3081                 $inputAttrs = null, $spanLabelAttrs = null
3082         ) {
3083                 wfDeprecated( __METHOD__, '1.30' );
3084                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3085                 $inputAttrs += Linker::tooltipAndAccesskeyAttribs( 'summary' );
3086
3087                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3088                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3089                         'id' => "wpSummaryLabel"
3090                 ];
3091
3092                 $label = null;
3093                 if ( $labelText ) {
3094                         $label = Xml::tags(
3095                                 'label',
3096                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3097                                 $labelText
3098                         );
3099                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3100                 }
3101
3102                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3103
3104                 return [ $label, $input ];
3105         }
3106
3107         /**
3108          * Builds a standard summary input with a label.
3109          *
3110          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3111          * @param string $summary The value of the summary input
3112          * @param string $labelText The html to place inside the label
3113          * @param array $inputAttrs Array of attrs to use on the input
3114          *
3115          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3116          */
3117         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3118                 wfDeprecated( __METHOD__, '1.30' );
3119                 $this->getSummaryInputWidget( $summary, $labelText, $inputAttrs );
3120         }
3121
3122         /**
3123          * Builds a standard summary input with a label.
3124          *
3125          * @param string $summary The value of the summary input
3126          * @param string $labelText The html to place inside the label
3127          * @param array $inputAttrs Array of attrs to use on the input
3128          *
3129          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3130          */
3131         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3132                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3133                         $this->getSummaryInputAttributes( $inputAttrs )
3134                 );
3135                 $inputAttrs += [
3136                         'title' => Linker::titleAttrib( 'summary' ),
3137                         'accessKey' => Linker::accesskey( 'summary' ),
3138                 ];
3139
3140                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3141                 $inputAttrs['inputId'] = $inputAttrs['id'];
3142                 $inputAttrs['id'] = 'wpSummaryWidget';
3143
3144                 return new OOUI\FieldLayout(
3145                         new OOUI\TextInputWidget( [
3146                                 'value' => $summary,
3147                                 'infusable' => true,
3148                         ] + $inputAttrs ),
3149                         [
3150                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3151                                 'align' => 'top',
3152                                 'id' => 'wpSummaryLabel',
3153                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3154                         ]
3155                 );
3156         }
3157
3158         /**
3159          * @param bool $isSubjectPreview True if this is the section subject/title
3160          *   up top, or false if this is the comment summary
3161          *   down below the textarea
3162          * @param string $summary The text of the summary to display
3163          */
3164         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3165                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3166                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3167                 if ( $isSubjectPreview ) {
3168                         if ( $this->nosummary ) {
3169                                 return;
3170                         }
3171                 } else {
3172                         if ( !$this->mShowSummaryField ) {
3173                                 return;
3174                         }
3175                 }
3176
3177                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3178                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3179                                 $summary,
3180                                 $labelText,
3181                                 [ 'class' => $summaryClass ]
3182                         ) );
3183         }
3184
3185         /**
3186          * @param bool $isSubjectPreview True if this is the section subject/title
3187          *   up top, or false if this is the comment summary
3188          *   down below the textarea
3189          * @param string $summary The text of the summary to display
3190          * @return string
3191          */
3192         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3193                 // avoid spaces in preview, gets always trimmed on save
3194                 $summary = trim( $summary );
3195                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3196                         return "";
3197                 }
3198
3199                 global $wgParser;
3200
3201                 if ( $isSubjectPreview ) {
3202                         $summary = $this->context->msg( 'newsectionsummary' )
3203                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3204                                 ->inContentLanguage()->text();
3205                 }
3206
3207                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3208
3209                 $summary = $this->context->msg( $message )->parse()
3210                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3211                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3212         }
3213
3214         protected function showFormBeforeText() {
3215                 $out = $this->context->getOutput();
3216                 $out->addHTML( Html::hidden( 'wpSection', htmlspecialchars( $this->section ) ) );
3217                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3218                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3219                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3220                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3221
3222                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3223                         $out->addHTML( Html::hidden( 'safemode', '1' ) );
3224                 }
3225         }
3226
3227         protected function showFormAfterText() {
3228                 /**
3229                  * To make it harder for someone to slip a user a page
3230                  * which submits an edit form to the wiki without their
3231                  * knowledge, a random token is associated with the login
3232                  * session. If it's not passed back with the submission,
3233                  * we won't save the page, or render user JavaScript and
3234                  * CSS previews.
3235                  *
3236                  * For anon editors, who may not have a session, we just
3237                  * include the constant suffix to prevent editing from
3238                  * broken text-mangling proxies.
3239                  */
3240                 $this->context->getOutput()->addHTML(
3241                         "\n" .
3242                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3243                         "\n"
3244                 );
3245         }
3246
3247         /**
3248          * Subpage overridable method for printing the form for page content editing
3249          * By default this simply outputs wpTextbox1
3250          * Subclasses can override this to provide a custom UI for editing;
3251          * be it a form, or simply wpTextbox1 with a modified content that will be
3252          * reverse modified when extracted from the post data.
3253          * Note that this is basically the inverse for importContentFormData
3254          */
3255         protected function showContentForm() {
3256                 $this->showTextbox1();
3257         }
3258
3259         /**
3260          * Method to output wpTextbox1
3261          * The $textoverride method can be used by subclasses overriding showContentForm
3262          * to pass back to this method.
3263          *
3264          * @param array $customAttribs Array of html attributes to use in the textarea
3265          * @param string $textoverride Optional text to override $this->textarea1 with
3266          */
3267         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3268                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3269                         $attribs = [ 'style' => 'display:none;' ];
3270                 } else {
3271                         $classes = []; // Textarea CSS
3272                         if ( $this->mTitle->isProtected( 'edit' ) &&
3273                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3274                         ) {
3275                                 # Is the title semi-protected?
3276                                 if ( $this->mTitle->isSemiProtected() ) {
3277                                         $classes[] = 'mw-textarea-sprotected';
3278                                 } else {
3279                                         # Then it must be protected based on static groups (regular)
3280                                         $classes[] = 'mw-textarea-protected';
3281                                 }
3282                                 # Is the title cascade-protected?
3283                                 if ( $this->mTitle->isCascadeProtected() ) {
3284                                         $classes[] = 'mw-textarea-cprotected';
3285                                 }
3286                         }
3287                         # Is an old revision being edited?
3288                         if ( $this->isOldRev ) {
3289                                 $classes[] = 'mw-textarea-oldrev';
3290                         }
3291
3292                         $attribs = [ 'tabindex' => 1 ];
3293
3294                         if ( is_array( $customAttribs ) ) {
3295                                 $attribs += $customAttribs;
3296                         }
3297
3298                         if ( count( $classes ) ) {
3299                                 if ( isset( $attribs['class'] ) ) {
3300                                         $classes[] = $attribs['class'];
3301                                 }
3302                                 $attribs['class'] = implode( ' ', $classes );
3303                         }
3304                 }
3305
3306                 $this->showTextbox(
3307                         $textoverride !== null ? $textoverride : $this->textbox1,
3308                         'wpTextbox1',
3309                         $attribs
3310                 );
3311         }
3312
3313         protected function showTextbox2() {
3314                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3315         }
3316
3317         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3318                 $wikitext = $this->safeUnicodeOutput( $text );
3319                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3320
3321                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $this->context->getUser() );
3322
3323                 $this->context->getOutput()->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3324         }
3325
3326         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3327                 $classes = [];
3328                 if ( $isOnTop ) {
3329                         $classes[] = 'ontop';
3330                 }
3331
3332                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3333
3334                 if ( $this->formtype != 'preview' ) {
3335                         $attribs['style'] = 'display: none;';
3336                 }
3337
3338                 $out = $this->context->getOutput();
3339                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3340
3341                 if ( $this->formtype == 'preview' ) {
3342                         $this->showPreview( $previewOutput );
3343                 } else {
3344                         // Empty content container for LivePreview
3345                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3346                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3347                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3348                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3349                 }
3350
3351                 $out->addHTML( '</div>' );
3352
3353                 if ( $this->formtype == 'diff' ) {
3354                         try {
3355                                 $this->showDiff();
3356                         } catch ( MWContentSerializationException $ex ) {
3357                                 $msg = $this->context->msg(
3358                                         'content-failed-to-parse',
3359                                         $this->contentModel,
3360                                         $this->contentFormat,
3361                                         $ex->getMessage()
3362                                 );
3363                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3364                         }
3365                 }
3366         }
3367
3368         /**
3369          * Append preview output to OutputPage.
3370          * Includes category rendering if this is a category page.
3371          *
3372          * @param string $text The HTML to be output for the preview.
3373          */
3374         protected function showPreview( $text ) {
3375                 if ( $this->mArticle instanceof CategoryPage ) {
3376                         $this->mArticle->openShowCategory();
3377                 }
3378                 # This hook seems slightly odd here, but makes things more
3379                 # consistent for extensions.
3380                 $out = $this->context->getOutput();
3381                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3382                 $out->addHTML( $text );
3383                 if ( $this->mArticle instanceof CategoryPage ) {
3384                         $this->mArticle->closeShowCategory();
3385                 }
3386         }
3387
3388         /**
3389          * Get a diff between the current contents of the edit box and the
3390          * version of the page we're editing from.
3391          *
3392          * If this is a section edit, we'll replace the section as for final
3393          * save and then make a comparison.
3394          */
3395         public function showDiff() {
3396                 global $wgContLang;
3397
3398                 $oldtitlemsg = 'currentrev';
3399                 # if message does not exist, show diff against the preloaded default
3400                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3401                         $oldtext = $this->mTitle->getDefaultMessageText();
3402                         if ( $oldtext !== false ) {
3403                                 $oldtitlemsg = 'defaultmessagetext';
3404                                 $oldContent = $this->toEditContent( $oldtext );
3405                         } else {
3406                                 $oldContent = null;
3407                         }
3408                 } else {
3409                         $oldContent = $this->getCurrentContent();
3410                 }
3411
3412                 $textboxContent = $this->toEditContent( $this->textbox1 );
3413                 if ( $this->editRevId !== null ) {
3414                         $newContent = $this->page->replaceSectionAtRev(
3415                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3416                         );
3417                 } else {
3418                         $newContent = $this->page->replaceSectionContent(
3419                                 $this->section, $textboxContent, $this->summary, $this->edittime
3420                         );
3421                 }
3422
3423                 if ( $newContent ) {
3424                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3425
3426                         $user = $this->context->getUser();
3427                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
3428                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3429                 }
3430
3431                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3432                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3433                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3434
3435                         if ( !$oldContent ) {
3436                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3437                         }
3438
3439                         if ( !$newContent ) {
3440                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3441                         }
3442
3443                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3444                         $de->setContent( $oldContent, $newContent );
3445
3446                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3447                         $de->showDiffStyle();
3448                 } else {
3449                         $difftext = '';
3450                 }
3451
3452                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3453         }
3454
3455         /**
3456          * Show the header copyright warning.
3457          */
3458         protected function showHeaderCopyrightWarning() {
3459                 $msg = 'editpage-head-copy-warn';
3460                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3461                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3462                                 'editpage-head-copy-warn' );
3463                 }
3464         }
3465
3466         /**
3467          * Give a chance for site and per-namespace customizations of
3468          * terms of service summary link that might exist separately
3469          * from the copyright notice.
3470          *
3471          * This will display between the save button and the edit tools,
3472          * so should remain short!
3473          */
3474         protected function showTosSummary() {
3475                 $msg = 'editpage-tos-summary';
3476                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3477                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3478                         $out = $this->context->getOutput();
3479                         $out->addHTML( '<div class="mw-tos-summary">' );
3480                         $out->addWikiMsg( $msg );
3481                         $out->addHTML( '</div>' );
3482                 }
3483         }
3484
3485         /**
3486          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3487          * characters not present on most keyboards for copying/pasting.
3488          */
3489         protected function showEditTools() {
3490                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3491                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3492                         '</div>' );
3493         }
3494
3495         /**
3496          * Get the copyright warning
3497          *
3498          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3499          * @return string
3500          */
3501         protected function getCopywarn() {
3502                 return self::getCopyrightWarning( $this->mTitle );
3503         }
3504
3505         /**
3506          * Get the copyright warning, by default returns wikitext
3507          *
3508          * @param Title $title
3509          * @param string $format Output format, valid values are any function of a Message object
3510          * @param Language|string|null $langcode Language code or Language object.
3511          * @return string
3512          */
3513         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3514                 global $wgRightsText;
3515                 if ( $wgRightsText ) {
3516                         $copywarnMsg = [ 'copyrightwarning',
3517                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3518                                 $wgRightsText ];
3519                 } else {
3520                         $copywarnMsg = [ 'copyrightwarning2',
3521                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3522                 }
3523                 // Allow for site and per-namespace customization of contribution/copyright notice.
3524                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3525
3526                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3527                 if ( $langcode ) {
3528                         $msg->inLanguage( $langcode );
3529                 }
3530                 return "<div id=\"editpage-copywarn\">\n" .
3531                         $msg->$format() . "\n</div>";
3532         }
3533
3534         /**
3535          * Get the Limit report for page previews
3536          *
3537          * @since 1.22
3538          * @param ParserOutput $output ParserOutput object from the parse
3539          * @return string HTML
3540          */
3541         public static function getPreviewLimitReport( $output ) {
3542                 if ( !$output || !$output->getLimitReportData() ) {
3543                         return '';
3544                 }
3545
3546                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3547                         wfMessage( 'limitreport-title' )->parseAsBlock()
3548                 );
3549
3550                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3551                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3552
3553                 $limitReport .= Html::openElement( 'table', [
3554                         'class' => 'preview-limit-report wikitable'
3555                 ] ) .
3556                         Html::openElement( 'tbody' );
3557
3558                 foreach ( $output->getLimitReportData() as $key => $value ) {
3559                         if ( Hooks::run( 'ParserLimitReportFormat',
3560                                 [ $key, &$value, &$limitReport, true, true ]
3561                         ) ) {
3562                                 $keyMsg = wfMessage( $key );
3563                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3564                                 if ( !$valueMsg->exists() ) {
3565                                         $valueMsg = new RawMessage( '$1' );
3566                                 }
3567                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3568                                         $limitReport .= Html::openElement( 'tr' ) .
3569                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3570                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3571                                                 Html::closeElement( 'tr' );
3572                                 }
3573                         }
3574                 }
3575
3576                 $limitReport .= Html::closeElement( 'tbody' ) .
3577                         Html::closeElement( 'table' ) .
3578                         Html::closeElement( 'div' );
3579
3580                 return $limitReport;
3581         }
3582
3583         protected function showStandardInputs( &$tabindex = 2 ) {
3584                 $out = $this->context->getOutput();
3585                 $out->addHTML( "<div class='editOptions'>\n" );
3586
3587                 if ( $this->section != 'new' ) {
3588                         $this->showSummaryInput( false, $this->summary );
3589                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3590                 }
3591
3592                 $checkboxes = $this->getCheckboxesWidget(
3593                         $tabindex,
3594                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3595                 );
3596                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3597
3598                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3599
3600                 // Show copyright warning.
3601                 $out->addWikiText( $this->getCopywarn() );
3602                 $out->addHTML( $this->editFormTextAfterWarn );
3603
3604                 $out->addHTML( "<div class='editButtons'>\n" );
3605                 $out->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3606
3607                 $cancel = $this->getCancelLink();
3608                 if ( $cancel !== '' ) {
3609                         $cancel .= Html::element( 'span',
3610                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3611                                 $this->context->msg( 'pipe-separator' )->text() );
3612                 }
3613
3614                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3615                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3616                 $edithelp =
3617                         Html::linkButton(
3618                                 $this->context->msg( 'edithelp' )->text(),
3619                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3620                                 [ 'mw-ui-quiet' ]
3621                         ) .
3622                         $this->context->msg( 'word-separator' )->escaped() .
3623                         $this->context->msg( 'newwindow' )->parse();
3624
3625                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3626                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3627                 $out->addHTML( "</div><!-- editButtons -->\n" );
3628
3629                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3630
3631                 $out->addHTML( "</div><!-- editOptions -->\n" );
3632         }
3633
3634         /**
3635          * Show an edit conflict. textbox1 is already shown in showEditForm().
3636          * If you want to use another entry point to this function, be careful.
3637          */
3638         protected function showConflict() {
3639                 $out = $this->context->getOutput();
3640                 // Avoid PHP 7.1 warning of passing $this by reference
3641                 $editPage = $this;
3642                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3643                         $this->incrementConflictStats();
3644
3645                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3646
3647                         $content1 = $this->toEditContent( $this->textbox1 );
3648                         $content2 = $this->toEditContent( $this->textbox2 );
3649
3650                         $handler = ContentHandler::getForModelID( $this->contentModel );
3651                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3652                         $de->setContent( $content2, $content1 );
3653                         $de->showDiff(
3654                                 $this->context->msg( 'yourtext' )->parse(),
3655                                 $this->context->msg( 'storedversion' )->text()
3656                         );
3657
3658                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3659                         $this->showTextbox2();
3660                 }
3661         }
3662
3663         protected function incrementConflictStats() {
3664                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3665                 $stats->increment( 'edit.failures.conflict' );
3666                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3667                 if (
3668                         $this->mTitle->getNamespace() >= NS_MAIN &&
3669                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3670                 ) {
3671                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3672                 }
3673         }
3674
3675         /**
3676          * @return string
3677          */
3678         public function getCancelLink() {
3679                 $cancelParams = [];
3680                 if ( !$this->isConflict && $this->oldid > 0 ) {
3681                         $cancelParams['oldid'] = $this->oldid;
3682                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3683                         $cancelParams['redirect'] = 'no';
3684                 }
3685
3686                 return new OOUI\ButtonWidget( [
3687                         'id' => 'mw-editform-cancel',
3688                         'href' => $this->getContextTitle()->getLinkUrl( $cancelParams ),
3689                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3690                         'framed' => false,
3691                         'infusable' => true,
3692                         'flags' => 'destructive',
3693                 ] );
3694         }
3695
3696         /**
3697          * Returns the URL to use in the form's action attribute.
3698          * This is used by EditPage subclasses when simply customizing the action
3699          * variable in the constructor is not enough. This can be used when the
3700          * EditPage lives inside of a Special page rather than a custom page action.
3701          *
3702          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3703          * @return string
3704          */
3705         protected function getActionURL( Title $title ) {
3706                 return $title->getLocalURL( [ 'action' => $this->action ] );
3707         }
3708
3709         /**
3710          * Check if a page was deleted while the user was editing it, before submit.
3711          * Note that we rely on the logging table, which hasn't been always there,
3712          * but that doesn't matter, because this only applies to brand new
3713          * deletes.
3714          * @return bool
3715          */
3716         protected function wasDeletedSinceLastEdit() {
3717                 if ( $this->deletedSinceEdit !== null ) {
3718                         return $this->deletedSinceEdit;
3719                 }
3720
3721                 $this->deletedSinceEdit = false;
3722
3723                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3724                         $this->lastDelete = $this->getLastDelete();
3725                         if ( $this->lastDelete ) {
3726                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3727                                 if ( $deleteTime > $this->starttime ) {
3728                                         $this->deletedSinceEdit = true;
3729                                 }
3730                         }
3731                 }
3732
3733                 return $this->deletedSinceEdit;
3734         }
3735
3736         /**
3737          * @return bool|stdClass
3738          */
3739         protected function getLastDelete() {
3740                 $dbr = wfGetDB( DB_REPLICA );
3741                 $commentQuery = CommentStore::newKey( 'log_comment' )->getJoin();
3742                 $data = $dbr->selectRow(
3743                         [ 'logging', 'user' ] + $commentQuery['tables'],
3744                         [
3745                                 'log_type',
3746                                 'log_action',
3747                                 'log_timestamp',
3748                                 'log_user',
3749                                 'log_namespace',
3750                                 'log_title',
3751                                 'log_params',
3752                                 'log_deleted',
3753                                 'user_name'
3754                         ] + $commentQuery['fields'], [
3755                                 'log_namespace' => $this->mTitle->getNamespace(),
3756                                 'log_title' => $this->mTitle->getDBkey(),
3757                                 'log_type' => 'delete',
3758                                 'log_action' => 'delete',
3759                                 'user_id=log_user'
3760                         ],
3761                         __METHOD__,
3762                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3763                         [
3764                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3765                         ] + $commentQuery['joins']
3766                 );
3767                 // Quick paranoid permission checks...
3768                 if ( is_object( $data ) ) {
3769                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3770                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3771                         }
3772
3773                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3774                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3775                                 $data->log_comment_data = null;
3776                         }
3777                 }
3778
3779                 return $data;
3780         }
3781
3782         /**
3783          * Get the rendered text for previewing.
3784          * @throws MWException
3785          * @return string
3786          */
3787         public function getPreviewText() {
3788                 global $wgRawHtml;
3789                 global $wgAllowUserCss, $wgAllowUserJs;
3790
3791                 $out = $this->context->getOutput();
3792
3793                 if ( $wgRawHtml && !$this->mTokenOk ) {
3794                         // Could be an offsite preview attempt. This is very unsafe if
3795                         // HTML is enabled, as it could be an attack.
3796                         $parsedNote = '';
3797                         if ( $this->textbox1 !== '' ) {
3798                                 // Do not put big scary notice, if previewing the empty
3799                                 // string, which happens when you initially edit
3800                                 // a category page, due to automatic preview-on-open.
3801                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3802                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3803                                         true, /* interface */true );
3804                         }
3805                         $this->incrementEditFailureStats( 'session_loss' );
3806                         return $parsedNote;
3807                 }
3808
3809                 $note = '';
3810
3811                 try {
3812                         $content = $this->toEditContent( $this->textbox1 );
3813
3814                         $previewHTML = '';
3815                         if ( !Hooks::run(
3816                                 'AlternateEditPreview',
3817                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3818                         ) {
3819                                 return $previewHTML;
3820                         }
3821
3822                         # provide a anchor link to the editform
3823                         $continueEditing = '<span class="mw-continue-editing">' .
3824                                 '[[#' . self::EDITFORM_ID . '|' .
3825                                 $this->context->getLanguage()->getArrow() . ' ' .
3826                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3827                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3828                                 if ( $this->mTokenOkExceptSuffix ) {
3829                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3830                                         $this->incrementEditFailureStats( 'bad_token' );
3831                                 } else {
3832                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3833                                         $this->incrementEditFailureStats( 'session_loss' );
3834                                 }
3835                         } elseif ( $this->incompleteForm ) {
3836                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3837                                 if ( $this->mTriedSave ) {
3838                                         $this->incrementEditFailureStats( 'incomplete_form' );
3839                                 }
3840                         } else {
3841                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3842                         }
3843
3844                         # don't parse non-wikitext pages, show message about preview
3845                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3846                                 if ( $this->mTitle->isCssJsSubpage() ) {
3847                                         $level = 'user';
3848                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3849                                         $level = 'site';
3850                                 } else {
3851                                         $level = false;
3852                                 }
3853
3854                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3855                                         $format = 'css';
3856                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3857                                                 $format = false;
3858                                         }
3859                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3860                                         $format = 'js';
3861                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3862                                                 $format = false;
3863                                         }
3864                                 } else {
3865                                         $format = false;
3866                                 }
3867
3868                                 # Used messages to make sure grep find them:
3869                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3870                                 if ( $level && $format ) {
3871                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3872                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3873                                                 ' ' . $continueEditing . "</div>";
3874                                 }
3875                         }
3876
3877                         # If we're adding a comment, we need to show the
3878                         # summary as the headline
3879                         if ( $this->section === "new" && $this->summary !== "" ) {
3880                                 $content = $content->addSectionHeader( $this->summary );
3881                         }
3882
3883                         $hook_args = [ $this, &$content ];
3884                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3885
3886                         $parserResult = $this->doPreviewParse( $content );
3887                         $parserOutput = $parserResult['parserOutput'];
3888                         $previewHTML = $parserResult['html'];
3889                         $this->mParserOutput = $parserOutput;
3890                         $out->addParserOutputMetadata( $parserOutput );
3891
3892                         if ( count( $parserOutput->getWarnings() ) ) {
3893                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3894                         }
3895
3896                 } catch ( MWContentSerializationException $ex ) {
3897                         $m = $this->context->msg(
3898                                 'content-failed-to-parse',
3899                                 $this->contentModel,
3900                                 $this->contentFormat,
3901                                 $ex->getMessage()
3902                         );
3903                         $note .= "\n\n" . $m->parse();
3904                         $previewHTML = '';
3905                 }
3906
3907                 if ( $this->isConflict ) {
3908                         $conflict = '<h2 id="mw-previewconflict">'
3909                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3910                 } else {
3911                         $conflict = '<hr />';
3912                 }
3913
3914                 $previewhead = "<div class='previewnote'>\n" .
3915                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3916                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3917
3918                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3919                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3920                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3921                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3922
3923                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3924         }
3925
3926         private function incrementEditFailureStats( $failureType ) {
3927                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3928                 $stats->increment( 'edit.failures.' . $failureType );
3929         }
3930
3931         /**
3932          * Get parser options for a preview
3933          * @return ParserOptions
3934          */
3935         protected function getPreviewParserOptions() {
3936                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3937                 $parserOptions->setIsPreview( true );
3938                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3939                 $parserOptions->enableLimitReport();
3940                 return $parserOptions;
3941         }
3942
3943         /**
3944          * Parse the page for a preview. Subclasses may override this class, in order
3945          * to parse with different options, or to otherwise modify the preview HTML.
3946          *
3947          * @param Content $content The page content
3948          * @return array with keys:
3949          *   - parserOutput: The ParserOutput object
3950          *   - html: The HTML to be displayed
3951          */
3952         protected function doPreviewParse( Content $content ) {
3953                 $user = $this->context->getUser();
3954                 $parserOptions = $this->getPreviewParserOptions();
3955                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
3956                 $scopedCallback = $parserOptions->setupFakeRevision(
3957                         $this->mTitle, $pstContent, $user );
3958                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3959                 ScopedCallback::consume( $scopedCallback );
3960                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3961                 return [
3962                         'parserOutput' => $parserOutput,
3963                         'html' => $parserOutput->getText() ];
3964         }
3965
3966         /**
3967          * @return array
3968          */
3969         public function getTemplates() {
3970                 if ( $this->preview || $this->section != '' ) {
3971                         $templates = [];
3972                         if ( !isset( $this->mParserOutput ) ) {
3973                                 return $templates;
3974                         }
3975                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3976                                 foreach ( array_keys( $template ) as $dbk ) {
3977                                         $templates[] = Title::makeTitle( $ns, $dbk );
3978                                 }
3979                         }
3980                         return $templates;
3981                 } else {
3982                         return $this->mTitle->getTemplateLinksFrom();
3983                 }
3984         }
3985
3986         /**
3987          * Shows a bulletin board style toolbar for common editing functions.
3988          * It can be disabled in the user preferences.
3989          *
3990          * @param Title $title Title object for the page being edited (optional)
3991          * @return string
3992          */
3993         public static function getEditToolbar( $title = null ) {
3994                 global $wgContLang, $wgOut;
3995                 global $wgEnableUploads, $wgForeignFileRepos;
3996
3997                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3998                 $showSignature = true;
3999                 if ( $title ) {
4000                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4001                 }
4002
4003                 /**
4004                  * $toolarray is an array of arrays each of which includes the
4005                  * opening tag, the closing tag, optionally a sample text that is
4006                  * inserted between the two when no selection is highlighted
4007                  * and.  The tip text is shown when the user moves the mouse
4008                  * over the button.
4009                  *
4010                  * Images are defined in ResourceLoaderEditToolbarModule.
4011                  */
4012                 $toolarray = [
4013                         [
4014                                 'id'     => 'mw-editbutton-bold',
4015                                 'open'   => '\'\'\'',
4016                                 'close'  => '\'\'\'',
4017                                 'sample' => wfMessage( 'bold_sample' )->text(),
4018                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4019                         ],
4020                         [
4021                                 'id'     => 'mw-editbutton-italic',
4022                                 'open'   => '\'\'',
4023                                 'close'  => '\'\'',
4024                                 'sample' => wfMessage( 'italic_sample' )->text(),
4025                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4026                         ],
4027                         [
4028                                 'id'     => 'mw-editbutton-link',
4029                                 'open'   => '[[',
4030                                 'close'  => ']]',
4031                                 'sample' => wfMessage( 'link_sample' )->text(),
4032                                 'tip'    => wfMessage( 'link_tip' )->text(),
4033                         ],
4034                         [
4035                                 'id'     => 'mw-editbutton-extlink',
4036                                 'open'   => '[',
4037                                 'close'  => ']',
4038                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4039                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4040                         ],
4041                         [
4042                                 'id'     => 'mw-editbutton-headline',
4043                                 'open'   => "\n== ",
4044                                 'close'  => " ==\n",
4045                                 'sample' => wfMessage( 'headline_sample' )->text(),
4046                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4047                         ],
4048                         $imagesAvailable ? [
4049                                 'id'     => 'mw-editbutton-image',
4050                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4051                                 'close'  => ']]',
4052                                 'sample' => wfMessage( 'image_sample' )->text(),
4053                                 'tip'    => wfMessage( 'image_tip' )->text(),
4054                         ] : false,
4055                         $imagesAvailable ? [
4056                                 'id'     => 'mw-editbutton-media',
4057                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4058                                 'close'  => ']]',
4059                                 'sample' => wfMessage( 'media_sample' )->text(),
4060                                 'tip'    => wfMessage( 'media_tip' )->text(),
4061                         ] : false,
4062                         [
4063                                 'id'     => 'mw-editbutton-nowiki',
4064                                 'open'   => "<nowiki>",
4065                                 'close'  => "</nowiki>",
4066                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4067                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4068                         ],
4069                         $showSignature ? [
4070                                 'id'     => 'mw-editbutton-signature',
4071                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4072                                 'close'  => '',
4073                                 'sample' => '',
4074                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4075                         ] : false,
4076                         [
4077                                 'id'     => 'mw-editbutton-hr',
4078                                 'open'   => "\n----\n",
4079                                 'close'  => '',
4080                                 'sample' => '',
4081                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4082                         ]
4083                 ];
4084
4085                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4086                 foreach ( $toolarray as $tool ) {
4087                         if ( !$tool ) {
4088                                 continue;
4089                         }
4090
4091                         $params = [
4092                                 // Images are defined in ResourceLoaderEditToolbarModule
4093                                 false,
4094                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4095                                 // Older browsers show a "speedtip" type message only for ALT.
4096                                 // Ideally these should be different, realistically they
4097                                 // probably don't need to be.
4098                                 $tool['tip'],
4099                                 $tool['open'],
4100                                 $tool['close'],
4101                                 $tool['sample'],
4102                                 $tool['id'],
4103                         ];
4104
4105                         $script .= Xml::encodeJsCall(
4106                                 'mw.toolbar.addButton',
4107                                 $params,
4108                                 ResourceLoader::inDebugMode()
4109                         );
4110                 }
4111
4112                 $script .= '});';
4113
4114                 $toolbar = '<div id="toolbar"></div>';
4115
4116                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4117                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4118                         // been over-written by a hook caller
4119                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4120                 };
4121
4122                 return $toolbar;
4123         }
4124
4125         /**
4126          * Return an array of checkbox definitions.
4127          *
4128          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4129          *
4130          * Array values are associative arrays with the following keys:
4131          *  - 'label-message' (required): message for label text
4132          *  - 'id' (required): 'id' attribute for the `<input>`
4133          *  - 'default' (required): default checkedness (true or false)
4134          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4135          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4136          *    from messages like 'tooltip-foo', 'accesskey-foo'
4137          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4138          *  - 'legacy-name' (optional): short name for backwards-compatibility
4139          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4140          *   where bool indicates the checked status of the checkbox
4141          * @return array
4142          */
4143         public function getCheckboxesDefinition( $checked ) {
4144                 $checkboxes = [];
4145
4146                 $user = $this->context->getUser();
4147                 // don't show the minor edit checkbox if it's a new page or section
4148                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4149                         $checkboxes['wpMinoredit'] = [
4150                                 'id' => 'wpMinoredit',
4151                                 'label-message' => 'minoredit',
4152                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4153                                 'tooltip' => 'minoredit',
4154                                 'label-id' => 'mw-editpage-minoredit',
4155                                 'legacy-name' => 'minor',
4156                                 'default' => $checked['minor'],
4157                         ];
4158                 }
4159
4160                 if ( $user->isLoggedIn() ) {
4161                         $checkboxes['wpWatchthis'] = [
4162                                 'id' => 'wpWatchthis',
4163                                 'label-message' => 'watchthis',
4164                                 // Uses messages: tooltip-watch, accesskey-watch
4165                                 'tooltip' => 'watch',
4166                                 'label-id' => 'mw-editpage-watch',
4167                                 'legacy-name' => 'watch',
4168                                 'default' => $checked['watch'],
4169                         ];
4170                 }
4171
4172                 $editPage = $this;
4173                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4174
4175                 return $checkboxes;
4176         }
4177
4178         /**
4179          * Returns an array of html code of the following checkboxes old style:
4180          * minor and watch
4181          *
4182          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4183          * @param int &$tabindex Current tabindex
4184          * @param array $checked See getCheckboxesDefinition()
4185          * @return array
4186          */
4187         public function getCheckboxes( &$tabindex, $checked ) {
4188                 global $wgUseMediaWikiUIEverywhere;
4189
4190                 $checkboxes = [];
4191                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4192
4193                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4194                 if ( !$this->isNew ) {
4195                         $checkboxes['minor'] = '';
4196                 }
4197                 $checkboxes['watch'] = '';
4198
4199                 foreach ( $checkboxesDef as $name => $options ) {
4200                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4201                         $label = $this->context->msg( $options['label-message'] )->parse();
4202                         $attribs = [
4203                                 'tabindex' => ++$tabindex,
4204                                 'id' => $options['id'],
4205                         ];
4206                         $labelAttribs = [
4207                                 'for' => $options['id'],
4208                         ];
4209                         if ( isset( $options['tooltip'] ) ) {
4210                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4211                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4212                         }
4213                         if ( isset( $options['title-message'] ) ) {
4214                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4215                         }
4216                         if ( isset( $options['label-id'] ) ) {
4217                                 $labelAttribs['id'] = $options['label-id'];
4218                         }
4219                         $checkboxHtml =
4220                                 Xml::check( $name, $options['default'], $attribs ) .
4221                                 '&#160;' .
4222                                 Xml::tags( 'label', $labelAttribs, $label );
4223
4224                         if ( $wgUseMediaWikiUIEverywhere ) {
4225                                 $checkboxHtml = Html::rawElement( 'div', [ 'class' => 'mw-ui-checkbox' ], $checkboxHtml );
4226                         }
4227
4228                         $checkboxes[ $legacyName ] = $checkboxHtml;
4229                 }
4230
4231                 // Avoid PHP 7.1 warning of passing $this by reference
4232                 $editPage = $this;
4233                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4234                 return $checkboxes;
4235         }
4236
4237         /**
4238          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4239          * any other added by extensions.
4240          *
4241          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4242          * @param int &$tabindex Current tabindex
4243          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4244          *                 status of the checkbox
4245          *
4246          * @return array Associative array of string keys to OOUI\FieldLayout instances
4247          */
4248         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4249                 return $this->getCheckboxesWidget( $tabindex, $checked );
4250         }
4251
4252         /**
4253          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4254          * any other added by extensions.
4255          *
4256          * @param int &$tabindex Current tabindex
4257          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4258          *                 status of the checkbox
4259          *
4260          * @return array Associative array of string keys to OOUI\FieldLayout instances
4261          */
4262         public function getCheckboxesWidget( &$tabindex, $checked ) {
4263                 $checkboxes = [];
4264                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4265
4266                 foreach ( $checkboxesDef as $name => $options ) {
4267                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4268
4269                         $title = null;
4270                         $accesskey = null;
4271                         if ( isset( $options['tooltip'] ) ) {
4272                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4273                                 $title = Linker::titleAttrib( $options['tooltip'] );
4274                         }
4275                         if ( isset( $options['title-message'] ) ) {
4276                                 $title = $this->context->msg( $options['title-message'] )->text();
4277                         }
4278
4279                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4280                                 new OOUI\CheckboxInputWidget( [
4281                                         'tabIndex' => ++$tabindex,
4282                                         'accessKey' => $accesskey,
4283                                         'id' => $options['id'] . 'Widget',
4284                                         'inputId' => $options['id'],
4285                                         'name' => $name,
4286                                         'selected' => $options['default'],
4287                                         'infusable' => true,
4288                                 ] ),
4289                                 [
4290                                         'align' => 'inline',
4291                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4292                                         'title' => $title,
4293                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4294                                 ]
4295                         );
4296                 }
4297
4298                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4299                 // people have used it for the weirdest things completely unrelated to checkboxes...
4300                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4301                 $legacyCheckboxes = [];
4302                 if ( !$this->isNew ) {
4303                         $legacyCheckboxes['minor'] = '';
4304                 }
4305                 $legacyCheckboxes['watch'] = '';
4306                 // Copy new-style checkboxes into an old-style structure
4307                 foreach ( $checkboxes as $name => $oouiLayout ) {
4308                         $legacyCheckboxes[$name] = (string)$oouiLayout;
4309                 }
4310                 // Avoid PHP 7.1 warning of passing $this by reference
4311                 $ep = $this;
4312                 Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
4313                 // Copy back any additional old-style checkboxes into the new-style structure
4314                 foreach ( $legacyCheckboxes as $name => $html ) {
4315                         if ( $html && !isset( $checkboxes[$name] ) ) {
4316                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4317                         }
4318                 }
4319
4320                 return $checkboxes;
4321         }
4322
4323         /**
4324          * Get the message key of the label for the button to save the page
4325          *
4326          * @return string
4327          */
4328         protected function getSubmitButtonLabel() {
4329                 $labelAsPublish =
4330                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4331
4332                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4333                 $newPage = !$this->mTitle->exists();
4334
4335                 if ( $labelAsPublish ) {
4336                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4337                 } else {
4338                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4339                 }
4340
4341                 return $buttonLabelKey;
4342         }
4343
4344         /**
4345          * Returns an array of html code of the following buttons:
4346          * save, diff and preview
4347          *
4348          * @param int &$tabindex Current tabindex
4349          *
4350          * @return array
4351          */
4352         public function getEditButtons( &$tabindex ) {
4353                 $buttons = [];
4354
4355                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4356
4357                 $attribs = [
4358                         'name' => 'wpSave',
4359                         'tabindex' => ++$tabindex,
4360                 ];
4361
4362                 $saveConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4363                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4364                         'id' => 'wpSaveWidget',
4365                         'inputId' => 'wpSave',
4366                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4367                         'useInputTag' => true,
4368                         'flags' => [ 'constructive', 'primary' ],
4369                         'label' => $buttonLabel,
4370                         'infusable' => true,
4371                         'type' => 'submit',
4372                         'title' => Linker::titleAttrib( 'save' ),
4373                         'accessKey' => Linker::accesskey( 'save' ),
4374                 ] + $saveConfig );
4375
4376                 $attribs = [
4377                         'name' => 'wpPreview',
4378                         'tabindex' => ++$tabindex,
4379                 ];
4380
4381                 $previewConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4382                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4383                         'id' => 'wpPreviewWidget',
4384                         'inputId' => 'wpPreview',
4385                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4386                         'useInputTag' => true,
4387                         'label' => $this->context->msg( 'showpreview' )->text(),
4388                         'infusable' => true,
4389                         'type' => 'submit',
4390                         'title' => Linker::titleAttrib( 'preview' ),
4391                         'accessKey' => Linker::accesskey( 'preview' ),
4392                 ] + $previewConfig );
4393
4394                 $attribs = [
4395                         'name' => 'wpDiff',
4396                         'tabindex' => ++$tabindex,
4397                 ];
4398
4399                 $diffConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4400                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4401                         'id' => 'wpDiffWidget',
4402                         'inputId' => 'wpDiff',
4403                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4404                         'useInputTag' => true,
4405                         'label' => $this->context->msg( 'showdiff' )->text(),
4406                         'infusable' => true,
4407                         'type' => 'submit',
4408                         'title' => Linker::titleAttrib( 'diff' ),
4409                         'accessKey' => Linker::accesskey( 'diff' ),
4410                 ] + $diffConfig );
4411
4412                 // Avoid PHP 7.1 warning of passing $this by reference
4413                 $editPage = $this;
4414                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4415
4416                 return $buttons;
4417         }
4418
4419         /**
4420          * Creates a basic error page which informs the user that
4421          * they have attempted to edit a nonexistent section.
4422          */
4423         public function noSuchSectionPage() {
4424                 $out = $this->context->getOutput();
4425                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4426
4427                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4428
4429                 // Avoid PHP 7.1 warning of passing $this by reference
4430                 $editPage = $this;
4431                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4432                 $out->addHTML( $res );
4433
4434                 $out->returnToMain( false, $this->mTitle );
4435         }
4436
4437         /**
4438          * Show "your edit contains spam" page with your diff and text
4439          *
4440          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4441          */
4442         public function spamPageWithContent( $match = false ) {
4443                 $this->textbox2 = $this->textbox1;
4444
4445                 if ( is_array( $match ) ) {
4446                         $match = $this->context->getLanguage()->listToText( $match );
4447                 }
4448                 $out = $this->context->getOutput();
4449                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4450
4451                 $out->addHTML( '<div id="spamprotected">' );
4452                 $out->addWikiMsg( 'spamprotectiontext' );
4453                 if ( $match ) {
4454                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4455                 }
4456                 $out->addHTML( '</div>' );
4457
4458                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4459                 $this->showDiff();
4460
4461                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4462                 $this->showTextbox2();
4463
4464                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4465         }
4466
4467         /**
4468          * Check if the browser is on a blacklist of user-agents known to
4469          * mangle UTF-8 data on form submission. Returns true if Unicode
4470          * should make it through, false if it's known to be a problem.
4471          * @return bool
4472          */
4473         private function checkUnicodeCompliantBrowser() {
4474                 global $wgBrowserBlackList, $wgRequest;
4475
4476                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4477                 if ( $currentbrowser === false ) {
4478                         // No User-Agent header sent? Trust it by default...
4479                         return true;
4480                 }
4481
4482                 foreach ( $wgBrowserBlackList as $browser ) {
4483                         if ( preg_match( $browser, $currentbrowser ) ) {
4484                                 return false;
4485                         }
4486                 }
4487                 return true;
4488         }
4489
4490         /**
4491          * Filter an input field through a Unicode de-armoring process if it
4492          * came from an old browser with known broken Unicode editing issues.
4493          *
4494          * @param WebRequest $request
4495          * @param string $field
4496          * @return string
4497          */
4498         protected function safeUnicodeInput( $request, $field ) {
4499                 $text = rtrim( $request->getText( $field ) );
4500                 return $request->getBool( 'safemode' )
4501                         ? $this->unmakeSafe( $text )
4502                         : $text;
4503         }
4504
4505         /**
4506          * Filter an output field through a Unicode armoring process if it is
4507          * going to an old browser with known broken Unicode editing issues.
4508          *
4509          * @param string $text
4510          * @return string
4511          */
4512         protected function safeUnicodeOutput( $text ) {
4513                 return $this->checkUnicodeCompliantBrowser()
4514                         ? $text
4515                         : $this->makeSafe( $text );
4516         }
4517
4518         /**
4519          * A number of web browsers are known to corrupt non-ASCII characters
4520          * in a UTF-8 text editing environment. To protect against this,
4521          * detected browsers will be served an armored version of the text,
4522          * with non-ASCII chars converted to numeric HTML character references.
4523          *
4524          * Preexisting such character references will have a 0 added to them
4525          * to ensure that round-trips do not alter the original data.
4526          *
4527          * @param string $invalue
4528          * @return string
4529          */
4530         private function makeSafe( $invalue ) {
4531                 // Armor existing references for reversibility.
4532                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4533
4534                 $bytesleft = 0;
4535                 $result = "";
4536                 $working = 0;
4537                 $valueLength = strlen( $invalue );
4538                 for ( $i = 0; $i < $valueLength; $i++ ) {
4539                         $bytevalue = ord( $invalue[$i] );
4540                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4541                                 $result .= chr( $bytevalue );
4542                                 $bytesleft = 0;
4543                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4544                                 $working = $working << 6;
4545                                 $working += ( $bytevalue & 0x3F );
4546                                 $bytesleft--;
4547                                 if ( $bytesleft <= 0 ) {
4548                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4549                                 }
4550                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4551                                 $working = $bytevalue & 0x1F;
4552                                 $bytesleft = 1;
4553                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4554                                 $working = $bytevalue & 0x0F;
4555                                 $bytesleft = 2;
4556                         } else { // 1111 0xxx
4557                                 $working = $bytevalue & 0x07;
4558                                 $bytesleft = 3;
4559                         }
4560                 }
4561                 return $result;
4562         }
4563
4564         /**
4565          * Reverse the previously applied transliteration of non-ASCII characters
4566          * back to UTF-8. Used to protect data from corruption by broken web browsers
4567          * as listed in $wgBrowserBlackList.
4568          *
4569          * @param string $invalue
4570          * @return string
4571          */
4572         private function unmakeSafe( $invalue ) {
4573                 $result = "";
4574                 $valueLength = strlen( $invalue );
4575                 for ( $i = 0; $i < $valueLength; $i++ ) {
4576                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4577                                 $i += 3;
4578                                 $hexstring = "";
4579                                 do {
4580                                         $hexstring .= $invalue[$i];
4581                                         $i++;
4582                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4583
4584                                 // Do some sanity checks. These aren't needed for reversibility,
4585                                 // but should help keep the breakage down if the editor
4586                                 // breaks one of the entities whilst editing.
4587                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4588                                         $codepoint = hexdec( $hexstring );
4589                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4590                                 } else {
4591                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4592                                 }
4593                         } else {
4594                                 $result .= substr( $invalue, $i, 1 );
4595                         }
4596                 }
4597                 // reverse the transform that we made for reversibility reasons.
4598                 return strtr( $result, [ "&#x0" => "&#x" ] );
4599         }
4600
4601         /**
4602          * @since 1.29
4603          */
4604         protected function addEditNotices() {
4605                 $out = $this->context->getOutput();
4606                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4607                 if ( count( $editNotices ) ) {
4608                         $out->addHTML( implode( "\n", $editNotices ) );
4609                 } else {
4610                         $msg = $this->context->msg( 'editnotice-notext' );
4611                         if ( !$msg->isDisabled() ) {
4612                                 $out->addHTML(
4613                                         '<div class="mw-editnotice-notext">'
4614                                         . $msg->parseAsBlock()
4615                                         . '</div>'
4616                                 );
4617                         }
4618                 }
4619         }
4620
4621         /**
4622          * @since 1.29
4623          */
4624         protected function addTalkPageText() {
4625                 if ( $this->mTitle->isTalkPage() ) {
4626                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4627                 }
4628         }
4629
4630         /**
4631          * @since 1.29
4632          */
4633         protected function addLongPageWarningHeader() {
4634                 global $wgMaxArticleSize;
4635
4636                 if ( $this->contentLength === false ) {
4637                         $this->contentLength = strlen( $this->textbox1 );
4638                 }
4639
4640                 $out = $this->context->getOutput();
4641                 $lang = $this->context->getLanguage();
4642                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4643                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4644                                 [
4645                                         'longpageerror',
4646                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4647                                         $lang->formatNum( $wgMaxArticleSize )
4648                                 ]
4649                         );
4650                 } else {
4651                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4652                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4653                                         [
4654                                                 'longpage-hint',
4655                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4656                                                 strlen( $this->textbox1 )
4657                                         ]
4658                                 );
4659                         }
4660                 }
4661         }
4662
4663         /**
4664          * @since 1.29
4665          */
4666         protected function addPageProtectionWarningHeaders() {
4667                 $out = $this->context->getOutput();
4668                 if ( $this->mTitle->isProtected( 'edit' ) &&
4669                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4670                 ) {
4671                         # Is the title semi-protected?
4672                         if ( $this->mTitle->isSemiProtected() ) {
4673                                 $noticeMsg = 'semiprotectedpagewarning';
4674                         } else {
4675                                 # Then it must be protected based on static groups (regular)
4676                                 $noticeMsg = 'protectedpagewarning';
4677                         }
4678                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4679                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4680                 }
4681                 if ( $this->mTitle->isCascadeProtected() ) {
4682                         # Is this page under cascading protection from some source pages?
4683                         /** @var Title[] $cascadeSources */
4684                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4685                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4686                         $cascadeSourcesCount = count( $cascadeSources );
4687                         if ( $cascadeSourcesCount > 0 ) {
4688                                 # Explain, and list the titles responsible
4689                                 foreach ( $cascadeSources as $page ) {
4690                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4691                                 }
4692                         }
4693                         $notice .= '</div>';
4694                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4695                 }
4696                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4697                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4698                                 [ 'lim' => 1,
4699                                         'showIfEmpty' => false,
4700                                         'msgKey' => [ 'titleprotectedwarning' ],
4701                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4702                 }
4703         }
4704
4705         /**
4706          * @param OutputPage $out
4707          * @since 1.29
4708          */
4709         protected function addExplainConflictHeader( OutputPage $out ) {
4710                 $out->wrapWikiMsg(
4711                         "<div class='mw-explainconflict'>\n$1\n</div>",
4712                         [ 'explainconflict', $this->context->msg( $this->getSubmitButtonLabel() )->text() ]
4713                 );
4714         }
4715
4716         /**
4717          * @param string $name
4718          * @param mixed[] $customAttribs
4719          * @param User $user
4720          * @return mixed[]
4721          * @since 1.29
4722          */
4723         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4724                 $attribs = $customAttribs + [
4725                                 'accesskey' => ',',
4726                                 'id' => $name,
4727                                 'cols' => 80,
4728                                 'rows' => 25,
4729                                 // Avoid PHP notices when appending preferences
4730                                 // (appending allows customAttribs['style'] to still work).
4731                                 'style' => ''
4732                         ];
4733
4734                 // The following classes can be used here:
4735                 // * mw-editfont-default
4736                 // * mw-editfont-monospace
4737                 // * mw-editfont-sans-serif
4738                 // * mw-editfont-serif
4739                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4740
4741                 if ( isset( $attribs['class'] ) ) {
4742                         if ( is_string( $attribs['class'] ) ) {
4743                                 $attribs['class'] .= ' ' . $class;
4744                         } elseif ( is_array( $attribs['class'] ) ) {
4745                                 $attribs['class'][] = $class;
4746                         }
4747                 } else {
4748                         $attribs['class'] = $class;
4749                 }
4750
4751                 $pageLang = $this->mTitle->getPageLanguage();
4752                 $attribs['lang'] = $pageLang->getHtmlCode();
4753                 $attribs['dir'] = $pageLang->getDir();
4754
4755                 return $attribs;
4756         }
4757
4758         /**
4759          * @param string $wikitext
4760          * @return string
4761          * @since 1.29
4762          */
4763         protected function addNewLineAtEnd( $wikitext ) {
4764                 if ( strval( $wikitext ) !== '' ) {
4765                         // Ensure there's a newline at the end, otherwise adding lines
4766                         // is awkward.
4767                         // But don't add a newline if the text is empty, or Firefox in XHTML
4768                         // mode will show an extra newline. A bit annoying.
4769                         $wikitext .= "\n";
4770                         return $wikitext;
4771                 }
4772                 return $wikitext;
4773         }
4774
4775         /**
4776          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4777          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4778          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4779          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4780          * spread the new style links more efficiently.
4781          *
4782          * @param string $text
4783          * @return string
4784          */
4785         private function guessSectionName( $text ) {
4786                 global $wgParser;
4787
4788                 // Detect Microsoft browsers
4789                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4790                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4791                         // ...and redirect them to legacy encoding, if available
4792                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4793                 }
4794                 // Meanwhile, real browsers get real anchors
4795                 return $wgParser->guessSectionNameFromWikiText( $text );
4796         }
4797 }