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                         wfDebugLog(
 473                                 'GlobalTitleFail',
 474                                 __METHOD__ . ' called by ' . wfGetAllCallers( 5 ) . ' with no title set.'
 475                         );
 476                         global $wgTitle;
 477                         return $wgTitle;
 478                 } else {
 479                         return $this->mContextTitle;
 480                 }
 481         }
 482
 483         /**
 484          * Check if the edit page is using OOUI controls
 485          * @return bool Always true
 486          * @deprecated since 1.30
 487          */
 488         public function isOouiEnabled() {
 489                 return true;
 490         }
 491
 492         /**
 493          * Returns if the given content model is editable.
 494          *
 495          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 496          * @return bool
 497          * @throws MWException If $modelId has no known handler
 498          */
 499         public function isSupportedContentModel( $modelId ) {
 500                 return $this->enableApiEditOverride === true ||
 501                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 502         }
 503
 504         /**
 505          * Allow editing of content that supports API direct editing, but not general
 506          * direct editing. Set to false by default.
 507          *
 508          * @param bool $enableOverride
 509          */
 510         public function setApiEditOverride( $enableOverride ) {
 511                 $this->enableApiEditOverride = $enableOverride;
 512         }
 513
 514         /**
 515          * @deprecated since 1.29, call edit directly
 516          */
 517         public function submit() {
 518                 wfDeprecated( __METHOD__, '1.29' );
 519                 $this->edit();
 520         }
 521
 522         /**
 523          * This is the function that gets called for "action=edit". It
 524          * sets up various member variables, then passes execution to
 525          * another function, usually showEditForm()
 526          *
 527          * The edit form is self-submitting, so that when things like
 528          * preview and edit conflicts occur, we get the same form back
 529          * with the extra stuff added.  Only when the final submission
 530          * is made and all is well do we actually save and redirect to
 531          * the newly-edited page.
 532          */
 533         public function edit() {
 534                 // Allow extensions to modify/prevent this form or submission
 535                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 536                         return;
 537                 }
 538
 539                 wfDebug( __METHOD__ . ": enter\n" );
 540
 541                 $request = $this->context->getRequest();
 542                 // If they used redlink=1 and the page exists, redirect to the main article
 543                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 544                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 545                         return;
 546                 }
 547
 548                 $this->importFormData( $request );
 549                 $this->firsttime = false;
 550
 551                 if ( wfReadOnly() && $this->save ) {
 552                         // Force preview
 553                         $this->save = false;
 554                         $this->preview = true;
 555                 }
 556
 557                 if ( $this->save ) {
 558                         $this->formtype = 'save';
 559                 } elseif ( $this->preview ) {
 560                         $this->formtype = 'preview';
 561                 } elseif ( $this->diff ) {
 562                         $this->formtype = 'diff';
 563                 } else { # First time through
 564                         $this->firsttime = true;
 565                         if ( $this->previewOnOpen() ) {
 566                                 $this->formtype = 'preview';
 567                         } else {
 568                                 $this->formtype = 'initial';
 569                         }
 570                 }
 571
 572                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 573                 if ( $permErrors ) {
 574                         wfDebug( __METHOD__ . ": User can't edit\n" );
 575                         // Auto-block user's IP if the account was "hard" blocked
 576                         if ( !wfReadOnly() ) {
 577                                 DeferredUpdates::addCallableUpdate( function () {
 578                                         $this->context->getUser()->spreadAnyEditBlock();
 579                                 } );
 580                         }
 581                         $this->displayPermissionsError( $permErrors );
 582
 583                         return;
 584                 }
 585
 586                 $revision = $this->mArticle->getRevisionFetched();
 587                 // Disallow editing revisions with content models different from the current one
 588                 // Undo edits being an exception in order to allow reverting content model changes.
 589                 if ( $revision
 590                         && $revision->getContentModel() !== $this->contentModel
 591                 ) {
 592                         $prevRev = null;
 593                         if ( $this->undidRev ) {
 594                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 595                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 596                         }
 597                         if ( !$this->undidRev
 598                                 || !$prevRev
 599                                 || $prevRev->getContentModel() !== $this->contentModel
 600                         ) {
 601                                 $this->displayViewSourcePage(
 602                                         $this->getContentObject(),
 603                                         $this->context->msg(
 604                                                 'contentmodelediterror',
 605                                                 $revision->getContentModel(),
 606                                                 $this->contentModel
 607                                         )->plain()
 608                                 );
 609                                 return;
 610                         }
 611                 }
 612
 613                 $this->isConflict = false;
 614                 // css / js subpages of user pages get a special treatment
 615                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 616                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 617                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 618                 // @todo FIXME: Silly assignment.
 619                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 620
 621                 # Show applicable editing introductions
 622                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 623                         $this->showIntro();
 624                 }
 625
 626                 # Attempt submission here.  This will check for edit conflicts,
 627                 # and redundantly check for locked database, blocked IPs, etc.
 628                 # that edit() already checked just in case someone tries to sneak
 629                 # in the back door with a hand-edited submission URL.
 630
 631                 if ( 'save' == $this->formtype ) {
 632                         $resultDetails = null;
 633                         $status = $this->attemptSave( $resultDetails );
 634                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 635                                 return;
 636                         }
 637                 }
 638
 639                 # First time through: get contents, set time for conflict
 640                 # checking, etc.
 641                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 642                         if ( $this->initialiseForm() === false ) {
 643                                 $this->noSuchSectionPage();
 644                                 return;
 645                         }
 646
 647                         if ( !$this->mTitle->getArticleID() ) {
 648                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 649                         } else {
 650                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 651                         }
 652
 653                 }
 654
 655                 $this->showEditForm();
 656         }
 657
 658         /**
 659          * @param string $rigor Same format as Title::getUserPermissionErrors()
 660          * @return array
 661          */
 662         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 663                 $user = $this->context->getUser();
 664                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 665                 # Can this title be created?
 666                 if ( !$this->mTitle->exists() ) {
 667                         $permErrors = array_merge(
 668                                 $permErrors,
 669                                 wfArrayDiff2(
 670                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 671                                         $permErrors
 672                                 )
 673                         );
 674                 }
 675                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 676                 $remove = [];
 677                 foreach ( $permErrors as $error ) {
 678                         if ( ( $this->preview || $this->diff )
 679                                 && (
 680                                         $error[0] == 'blockedtext' ||
 681                                         $error[0] == 'autoblockedtext' ||
 682                                         $error[0] == 'systemblockedtext'
 683                                 )
 684                         ) {
 685                                 $remove[] = $error;
 686                         }
 687                 }
 688                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 689
 690                 return $permErrors;
 691         }
 692
 693         /**
 694          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 695          * but with the following differences:
 696          * - If redlink=1, the user will be redirected to the page
 697          * - If there is content to display or the error occurs while either saving,
 698          *   previewing or showing the difference, it will be a
 699          *   "View source for ..." page displaying the source code after the error message.
 700          *
 701          * @since 1.19
 702          * @param array $permErrors Array of permissions errors, as returned by
 703          *    Title::getUserPermissionsErrors().
 704          * @throws PermissionsError
 705          */
 706         protected function displayPermissionsError( array $permErrors ) {
 707                 $out = $this->context->getOutput();
 708                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 709                         // The edit page was reached via a red link.
 710                         // Redirect to the article page and let them click the edit tab if
 711                         // they really want a permission error.
 712                         $out->redirect( $this->mTitle->getFullURL() );
 713                         return;
 714                 }
 715
 716                 $content = $this->getContentObject();
 717
 718                 # Use the normal message if there's nothing to display
 719                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 720                         $action = $this->mTitle->exists() ? 'edit' :
 721                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 722                         throw new PermissionsError( $action, $permErrors );
 723                 }
 724
 725                 $this->displayViewSourcePage(
 726                         $content,
 727                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 728                 );
 729         }
 730
 731         /**
 732          * Display a read-only View Source page
 733          * @param Content $content content object
 734          * @param string $errorMessage additional wikitext error message to display
 735          */
 736         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 737                 $out = $this->context->getOutput();
 738                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 739
 740                 $out->setRobotPolicy( 'noindex,nofollow' );
 741                 $out->setPageTitle( $this->context->msg(
 742                         'viewsource-title',
 743                         $this->getContextTitle()->getPrefixedText()
 744                 ) );
 745                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 746                 $out->addHTML( $this->editFormPageTop );
 747                 $out->addHTML( $this->editFormTextTop );
 748
 749                 if ( $errorMessage !== '' ) {
 750                         $out->addWikiText( $errorMessage );
 751                         $out->addHTML( "<hr />\n" );
 752                 }
 753
 754                 # If the user made changes, preserve them when showing the markup
 755                 # (This happens when a user is blocked during edit, for instance)
 756                 if ( !$this->firsttime ) {
 757                         $text = $this->textbox1;
 758                         $out->addWikiMsg( 'viewyourtext' );
 759                 } else {
 760                         try {
 761                                 $text = $this->toEditText( $content );
 762                         } catch ( MWException $e ) {
 763                                 # Serialize using the default format if the content model is not supported
 764                                 # (e.g. for an old revision with a different model)
 765                                 $text = $content->serialize();
 766                         }
 767                         $out->addWikiMsg( 'viewsourcetext' );
 768                 }
 769
 770                 $out->addHTML( $this->editFormTextBeforeContent );
 771                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 772                 $out->addHTML( $this->editFormTextAfterContent );
 773
 774                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 775
 776                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 777
 778                 $out->addHTML( $this->editFormTextBottom );
 779                 if ( $this->mTitle->exists() ) {
 780                         $out->returnToMain( null, $this->mTitle );
 781                 }
 782         }
 783
 784         /**
 785          * Should we show a preview when the edit form is first shown?
 786          *
 787          * @return bool
 788          */
 789         protected function previewOnOpen() {
 790                 global $wgPreviewOnOpenNamespaces;
 791                 $request = $this->context->getRequest();
 792                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 793                         // Explicit override from request
 794                         return true;
 795                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 796                         // Explicit override from request
 797                         return false;
 798                 } elseif ( $this->section == 'new' ) {
 799                         // Nothing *to* preview for new sections
 800                         return false;
 801                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 802                         && $this->context->getUser()->getOption( 'previewonfirst' )
 803                 ) {
 804                         // Standard preference behavior
 805                         return true;
 806                 } elseif ( !$this->mTitle->exists()
 807                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 808                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 809                 ) {
 810                         // Categories are special
 811                         return true;
 812                 } else {
 813                         return false;
 814                 }
 815         }
 816
 817         /**
 818          * Checks whether the user entered a skin name in uppercase,
 819          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 820          *
 821          * @return bool
 822          */
 823         protected function isWrongCaseCssJsPage() {
 824                 if ( $this->mTitle->isCssJsSubpage() ) {
 825                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 826                         $skins = array_merge(
 827                                 array_keys( Skin::getSkinNames() ),
 828                                 [ 'common' ]
 829                         );
 830                         return !in_array( $name, $skins )
 831                                 && in_array( strtolower( $name ), $skins );
 832                 } else {
 833                         return false;
 834                 }
 835         }
 836
 837         /**
 838          * Returns whether section editing is supported for the current page.
 839          * Subclasses may override this to replace the default behavior, which is
 840          * to check ContentHandler::supportsSections.
 841          *
 842          * @return bool True if this edit page supports sections, false otherwise.
 843          */
 844         protected function isSectionEditSupported() {
 845                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 846                 return $contentHandler->supportsSections();
 847         }
 848
 849         /**
 850          * This function collects the form data and uses it to populate various member variables.
 851          * @param WebRequest &$request
 852          * @throws ErrorPageError
 853          */
 854         public function importFormData( &$request ) {
 855                 # Section edit can come from either the form or a link
 856                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 857
 858                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 859                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 860                 }
 861
 862                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 863
 864                 if ( $request->wasPosted() ) {
 865                         # These fields need to be checked for encoding.
 866                         # Also remove trailing whitespace, but don't remove _initial_
 867                         # whitespace from the text boxes. This may be significant formatting.
 868                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 869                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 870                                 // Skip this if wpTextbox2 has input, it indicates that we came
 871                                 // from a conflict page with raw page text, not a custom form
 872                                 // modified by subclasses
 873                                 $textbox1 = $this->importContentFormData( $request );
 874                                 if ( $textbox1 !== null ) {
 875                                         $this->textbox1 = $textbox1;
 876                                 }
 877                         }
 878
 879                         $this->summary = $request->getText( 'wpSummary' );
 880
 881                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 882                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 883                         # section titles.
 884                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 885
 886                         # Treat sectiontitle the same way as summary.
 887                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 888                         # currently doing double duty as both edit summary and section title. Right now this
 889                         # is just to allow API edits to work around this limitation, but this should be
 890                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 891                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 892                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 893
 894                         $this->edittime = $request->getVal( 'wpEdittime' );
 895                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 896                         $this->starttime = $request->getVal( 'wpStarttime' );
 897
 898                         $undidRev = $request->getInt( 'wpUndidRevision' );
 899                         if ( $undidRev ) {
 900                                 $this->undidRev = $undidRev;
 901                         }
 902
 903                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 904
 905                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 906                                 // wpTextbox1 field is missing, possibly due to being "too big"
 907                                 // according to some filter rules such as Suhosin's setting for
 908                                 // suhosin.request.max_value_length (d'oh)
 909                                 $this->incompleteForm = true;
 910                         } else {
 911                                 // If we receive the last parameter of the request, we can fairly
 912                                 // claim the POST request has not been truncated.
 913
 914                                 // TODO: softened the check for cutover.  Once we determine
 915                                 // that it is safe, we should complete the transition by
 916                                 // removing the "edittime" clause.
 917                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 918                                         && is_null( $this->edittime ) );
 919                         }
 920                         if ( $this->incompleteForm ) {
 921                                 # If the form is incomplete, force to preview.
 922                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 923                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 924                                 $this->preview = true;
 925                         } else {
 926                                 $this->preview = $request->getCheck( 'wpPreview' );
 927                                 $this->diff = $request->getCheck( 'wpDiff' );
 928
 929                                 // Remember whether a save was requested, so we can indicate
 930                                 // if we forced preview due to session failure.
 931                                 $this->mTriedSave = !$this->preview;
 932
 933                                 if ( $this->tokenOk( $request ) ) {
 934                                         # Some browsers will not report any submit button
 935                                         # if the user hits enter in the comment box.
 936                                         # The unmarked state will be assumed to be a save,
 937                                         # if the form seems otherwise complete.
 938                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 939                                 } elseif ( $this->diff ) {
 940                                         # Failed token check, but only requested "Show Changes".
 941                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 942                                 } else {
 943                                         # Page might be a hack attempt posted from
 944                                         # an external site. Preview instead of saving.
 945                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 946                                         $this->preview = true;
 947                                 }
 948                         }
 949                         $this->save = !$this->preview && !$this->diff;
 950                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 951                                 $this->edittime = null;
 952                         }
 953
 954                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 955                                 $this->starttime = null;
 956                         }
 957
 958                         $this->recreate = $request->getCheck( 'wpRecreate' );
 959
 960                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 961                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 962
 963                         $user = $this->context->getUser();
 964                         # Don't force edit summaries when a user is editing their own user or talk page
 965                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 966                                 && $this->mTitle->getText() == $user->getName()
 967                         ) {
 968                                 $this->allowBlankSummary = true;
 969                         } else {
 970                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 971                                         || !$user->getOption( 'forceeditsummary' );
 972                         }
 973
 974                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 975
 976                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 977                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 978
 979                         $changeTags = $request->getVal( 'wpChangeTags' );
 980                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 981                                 $this->changeTags = [];
 982                         } else {
 983                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 984                                         $changeTags ) ) );
 985                         }
 986                 } else {
 987                         # Not a posted form? Start with nothing.
 988                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 989                         $this->textbox1 = '';
 990                         $this->summary = '';
 991                         $this->sectiontitle = '';
 992                         $this->edittime = '';
 993                         $this->editRevId = null;
 994                         $this->starttime = wfTimestampNow();
 995                         $this->edit = false;
 996                         $this->preview = false;
 997                         $this->save = false;
 998                         $this->diff = false;
 999                         $this->minoredit = false;
1000                         // Watch may be overridden by request parameters
1001                         $this->watchthis = $request->getBool( 'watchthis', false );
1002                         $this->recreate = false;
1003
1004                         // When creating a new section, we can preload a section title by passing it as the
1005                         // preloadtitle parameter in the URL (T15100)
1006                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1007                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1008                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1009                                 $this->summary = $request->getVal( 'preloadtitle' );
1010                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1011                                 $this->summary = $request->getText( 'summary' );
1012                                 if ( $this->summary !== '' ) {
1013                                         $this->hasPresetSummary = true;
1014                                 }
1015                         }
1016
1017                         if ( $request->getVal( 'minor' ) ) {
1018                                 $this->minoredit = true;
1019                         }
1020                 }
1021
1022                 $this->oldid = $request->getInt( 'oldid' );
1023                 $this->parentRevId = $request->getInt( 'parentRevId' );
1024
1025                 $this->bot = $request->getBool( 'bot', true );
1026                 $this->nosummary = $request->getBool( 'nosummary' );
1027
1028                 // May be overridden by revision.
1029                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1030                 // May be overridden by revision.
1031                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1032
1033                 try {
1034                         $handler = ContentHandler::getForModelID( $this->contentModel );
1035                 } catch ( MWUnknownContentModelException $e ) {
1036                         throw new ErrorPageError(
1037                                 'editpage-invalidcontentmodel-title',
1038                                 'editpage-invalidcontentmodel-text',
1039                                 [ wfEscapeWikiText( $this->contentModel ) ]
1040                         );
1041                 }
1042
1043                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1044                         throw new ErrorPageError(
1045                                 'editpage-notsupportedcontentformat-title',
1046                                 'editpage-notsupportedcontentformat-text',
1047                                 [
1048                                         wfEscapeWikiText( $this->contentFormat ),
1049                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1050                                 ]
1051                         );
1052                 }
1053
1054                 /**
1055                  * @todo Check if the desired model is allowed in this namespace, and if
1056                  *   a transition from the page's current model to the new model is
1057                  *   allowed.
1058                  */
1059
1060                 $this->editintro = $request->getText( 'editintro',
1061                         // Custom edit intro for new sections
1062                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1063
1064                 // Allow extensions to modify form data
1065                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1066         }
1067
1068         /**
1069          * Subpage overridable method for extracting the page content data from the
1070          * posted form to be placed in $this->textbox1, if using customized input
1071          * this method should be overridden and return the page text that will be used
1072          * for saving, preview parsing and so on...
1073          *
1074          * @param WebRequest &$request
1075          * @return string|null
1076          */
1077         protected function importContentFormData( &$request ) {
1078                 return; // Don't do anything, EditPage already extracted wpTextbox1
1079         }
1080
1081         /**
1082          * Initialise form fields in the object
1083          * Called on the first invocation, e.g. when a user clicks an edit link
1084          * @return bool If the requested section is valid
1085          */
1086         public function initialiseForm() {
1087                 $this->edittime = $this->page->getTimestamp();
1088                 $this->editRevId = $this->page->getLatest();
1089
1090                 $content = $this->getContentObject( false ); # TODO: track content object?!
1091                 if ( $content === false ) {
1092                         return false;
1093                 }
1094                 $this->textbox1 = $this->toEditText( $content );
1095
1096                 $user = $this->context->getUser();
1097                 // activate checkboxes if user wants them to be always active
1098                 # Sort out the "watch" checkbox
1099                 if ( $user->getOption( 'watchdefault' ) ) {
1100                         # Watch all edits
1101                         $this->watchthis = true;
1102                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1103                         # Watch creations
1104                         $this->watchthis = true;
1105                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1106                         # Already watched
1107                         $this->watchthis = true;
1108                 }
1109                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1110                         $this->minoredit = true;
1111                 }
1112                 if ( $this->textbox1 === false ) {
1113                         return false;
1114                 }
1115                 return true;
1116         }
1117
1118         /**
1119          * @param Content|null $def_content The default value to return
1120          *
1121          * @return Content|null Content on success, $def_content for invalid sections
1122          *
1123          * @since 1.21
1124          */
1125         protected function getContentObject( $def_content = null ) {
1126                 global $wgContLang;
1127
1128                 $content = false;
1129
1130                 $user = $this->context->getUser();
1131                 $request = $this->context->getRequest();
1132                 // For message page not locally set, use the i18n message.
1133                 // For other non-existent articles, use preload text if any.
1134                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1135                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1136                                 # If this is a system message, get the default text.
1137                                 $msg = $this->mTitle->getDefaultMessageText();
1138
1139                                 $content = $this->toEditContent( $msg );
1140                         }
1141                         if ( $content === false ) {
1142                                 # If requested, preload some text.
1143                                 $preload = $request->getVal( 'preload',
1144                                         // Custom preload text for new sections
1145                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1146                                 $params = $request->getArray( 'preloadparams', [] );
1147
1148                                 $content = $this->getPreloadedContent( $preload, $params );
1149                         }
1150                 // For existing pages, get text based on "undo" or section parameters.
1151                 } else {
1152                         if ( $this->section != '' ) {
1153                                 // Get section edit text (returns $def_text for invalid sections)
1154                                 $orig = $this->getOriginalContent( $user );
1155                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1156
1157                                 if ( !$content ) {
1158                                         $content = $def_content;
1159                                 }
1160                         } else {
1161                                 $undoafter = $request->getInt( 'undoafter' );
1162                                 $undo = $request->getInt( 'undo' );
1163
1164                                 if ( $undo > 0 && $undoafter > 0 ) {
1165                                         $undorev = Revision::newFromId( $undo );
1166                                         $oldrev = Revision::newFromId( $undoafter );
1167
1168                                         # Sanity check, make sure it's the right page,
1169                                         # the revisions exist and they were not deleted.
1170                                         # Otherwise, $content will be left as-is.
1171                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1172                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1173                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1174                                         ) {
1175                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1176
1177                                                 if ( $content === false ) {
1178                                                         # Warn the user that something went wrong
1179                                                         $undoMsg = 'failure';
1180                                                 } else {
1181                                                         $oldContent = $this->page->getContent( Revision::RAW );
1182                                                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1183                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1184                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1185                                                                 // The undo may change content
1186                                                                 // model if its reverting the top
1187                                                                 // edit. This can result in
1188                                                                 // mismatched content model/format.
1189                                                                 $this->contentModel = $newContent->getModel();
1190                                                                 $this->contentFormat = $oldrev->getContentFormat();
1191                                                         }
1192
1193                                                         if ( $newContent->equals( $oldContent ) ) {
1194                                                                 # Tell the user that the undo results in no change,
1195                                                                 # i.e. the revisions were already undone.
1196                                                                 $undoMsg = 'nochange';
1197                                                                 $content = false;
1198                                                         } else {
1199                                                                 # Inform the user of our success and set an automatic edit summary
1200                                                                 $undoMsg = 'success';
1201
1202                                                                 # If we just undid one rev, use an autosummary
1203                                                                 $firstrev = $oldrev->getNext();
1204                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1205                                                                         $userText = $undorev->getUserText();
1206                                                                         if ( $userText === '' ) {
1207                                                                                 $undoSummary = $this->context->msg(
1208                                                                                         'undo-summary-username-hidden',
1209                                                                                         $undo
1210                                                                                 )->inContentLanguage()->text();
1211                                                                         } else {
1212                                                                                 $undoSummary = $this->context->msg(
1213                                                                                         'undo-summary',
1214                                                                                         $undo,
1215                                                                                         $userText
1216                                                                                 )->inContentLanguage()->text();
1217                                                                         }
1218                                                                         if ( $this->summary === '' ) {
1219                                                                                 $this->summary = $undoSummary;
1220                                                                         } else {
1221                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1222                                                                                         ->inContentLanguage()->text() . $this->summary;
1223                                                                         }
1224                                                                         $this->undidRev = $undo;
1225                                                                 }
1226                                                                 $this->formtype = 'diff';
1227                                                         }
1228                                                 }
1229                                         } else {
1230                                                 // Failed basic sanity checks.
1231                                                 // Older revisions may have been removed since the link
1232                                                 // was created, or we may simply have got bogus input.
1233                                                 $undoMsg = 'norev';
1234                                         }
1235
1236                                         $out = $this->context->getOutput();
1237                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1238                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1239                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1240                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1241                                 }
1242
1243                                 if ( $content === false ) {
1244                                         $content = $this->getOriginalContent( $user );
1245                                 }
1246                         }
1247                 }
1248
1249                 return $content;
1250         }
1251
1252         /**
1253          * Get the content of the wanted revision, without section extraction.
1254          *
1255          * The result of this function can be used to compare user's input with
1256          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1257          * to the original text of the edit.
1258          *
1259          * This differs from Article::getContent() that when a missing revision is
1260          * encountered the result will be null and not the
1261          * 'missing-revision' message.
1262          *
1263          * @since 1.19
1264          * @param User $user The user to get the revision for
1265          * @return Content|null
1266          */
1267         private function getOriginalContent( User $user ) {
1268                 if ( $this->section == 'new' ) {
1269                         return $this->getCurrentContent();
1270                 }
1271                 $revision = $this->mArticle->getRevisionFetched();
1272                 if ( $revision === null ) {
1273                         $handler = ContentHandler::getForModelID( $this->contentModel );
1274                         return $handler->makeEmptyContent();
1275                 }
1276                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1277                 return $content;
1278         }
1279
1280         /**
1281          * Get the edit's parent revision ID
1282          *
1283          * The "parent" revision is the ancestor that should be recorded in this
1284          * page's revision history.  It is either the revision ID of the in-memory
1285          * article content, or in the case of a 3-way merge in order to rebase
1286          * across a recoverable edit conflict, the ID of the newer revision to
1287          * which we have rebased this page.
1288          *
1289          * @since 1.27
1290          * @return int Revision ID
1291          */
1292         public function getParentRevId() {
1293                 if ( $this->parentRevId ) {
1294                         return $this->parentRevId;
1295                 } else {
1296                         return $this->mArticle->getRevIdFetched();
1297                 }
1298         }
1299
1300         /**
1301          * Get the current content of the page. This is basically similar to
1302          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1303          * content object is returned instead of null.
1304          *
1305          * @since 1.21
1306          * @return Content
1307          */
1308         protected function getCurrentContent() {
1309                 $rev = $this->page->getRevision();
1310                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1311
1312                 if ( $content === false || $content === null ) {
1313                         $handler = ContentHandler::getForModelID( $this->contentModel );
1314                         return $handler->makeEmptyContent();
1315                 } elseif ( !$this->undidRev ) {
1316                         // Content models should always be the same since we error
1317                         // out if they are different before this point (in ->edit()).
1318                         // The exception being, during an undo, the current revision might
1319                         // differ from the prior revision.
1320                         $logger = LoggerFactory::getInstance( 'editpage' );
1321                         if ( $this->contentModel !== $rev->getContentModel() ) {
1322                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1323                                         'prev' => $this->contentModel,
1324                                         'new' => $rev->getContentModel(),
1325                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1326                                         'method' => __METHOD__
1327                                 ] );
1328                                 $this->contentModel = $rev->getContentModel();
1329                         }
1330
1331                         // Given that the content models should match, the current selected
1332                         // format should be supported.
1333                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1334                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1335
1336                                         'prev' => $this->contentFormat,
1337                                         'new' => $rev->getContentFormat(),
1338                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1339                                         'method' => __METHOD__
1340                                 ] );
1341                                 $this->contentFormat = $rev->getContentFormat();
1342                         }
1343                 }
1344                 return $content;
1345         }
1346
1347         /**
1348          * Use this method before edit() to preload some content into the edit box
1349          *
1350          * @param Content $content
1351          *
1352          * @since 1.21
1353          */
1354         public function setPreloadedContent( Content $content ) {
1355                 $this->mPreloadContent = $content;
1356         }
1357
1358         /**
1359          * Get the contents to be preloaded into the box, either set by
1360          * an earlier setPreloadText() or by loading the given page.
1361          *
1362          * @param string $preload Representing the title to preload from.
1363          * @param array $params Parameters to use (interface-message style) in the preloaded text
1364          *
1365          * @return Content
1366          *
1367          * @since 1.21
1368          */
1369         protected function getPreloadedContent( $preload, $params = [] ) {
1370                 if ( !empty( $this->mPreloadContent ) ) {
1371                         return $this->mPreloadContent;
1372                 }
1373
1374                 $handler = ContentHandler::getForModelID( $this->contentModel );
1375
1376                 if ( $preload === '' ) {
1377                         return $handler->makeEmptyContent();
1378                 }
1379
1380                 $user = $this->context->getUser();
1381                 $title = Title::newFromText( $preload );
1382                 # Check for existence to avoid getting MediaWiki:Noarticletext
1383                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1384                         // TODO: somehow show a warning to the user!
1385                         return $handler->makeEmptyContent();
1386                 }
1387
1388                 $page = WikiPage::factory( $title );
1389                 if ( $page->isRedirect() ) {
1390                         $title = $page->getRedirectTarget();
1391                         # Same as before
1392                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1393                                 // TODO: somehow show a warning to the user!
1394                                 return $handler->makeEmptyContent();
1395                         }
1396                         $page = WikiPage::factory( $title );
1397                 }
1398
1399                 $parserOptions = ParserOptions::newFromUser( $user );
1400                 $content = $page->getContent( Revision::RAW );
1401
1402                 if ( !$content ) {
1403                         // TODO: somehow show a warning to the user!
1404                         return $handler->makeEmptyContent();
1405                 }
1406
1407                 if ( $content->getModel() !== $handler->getModelID() ) {
1408                         $converted = $content->convert( $handler->getModelID() );
1409
1410                         if ( !$converted ) {
1411                                 // TODO: somehow show a warning to the user!
1412                                 wfDebug( "Attempt to preload incompatible content: " .
1413                                         "can't convert " . $content->getModel() .
1414                                         " to " . $handler->getModelID() );
1415
1416                                 return $handler->makeEmptyContent();
1417                         }
1418
1419                         $content = $converted;
1420                 }
1421
1422                 return $content->preloadTransform( $title, $parserOptions, $params );
1423         }
1424
1425         /**
1426          * Make sure the form isn't faking a user's credentials.
1427          *
1428          * @param WebRequest &$request
1429          * @return bool
1430          * @private
1431          */
1432         public function tokenOk( &$request ) {
1433                 $token = $request->getVal( 'wpEditToken' );
1434                 $user = $this->context->getUser();
1435                 $this->mTokenOk = $user->matchEditToken( $token );
1436                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1437                 return $this->mTokenOk;
1438         }
1439
1440         /**
1441          * Sets post-edit cookie indicating the user just saved a particular revision.
1442          *
1443          * This uses a temporary cookie for each revision ID so separate saves will never
1444          * interfere with each other.
1445          *
1446          * Article::view deletes the cookie on server-side after the redirect and
1447          * converts the value to the global JavaScript variable wgPostEdit.
1448          *
1449          * If the variable were set on the server, it would be cached, which is unwanted
1450          * since the post-edit state should only apply to the load right after the save.
1451          *
1452          * @param int $statusValue The status value (to check for new article status)
1453          */
1454         protected function setPostEditCookie( $statusValue ) {
1455                 $revisionId = $this->page->getLatest();
1456                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1457
1458                 $val = 'saved';
1459                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1460                         $val = 'created';
1461                 } elseif ( $this->oldid ) {
1462                         $val = 'restored';
1463                 }
1464
1465                 $response = $this->context->getRequest()->response();
1466                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1467         }
1468
1469         /**
1470          * Attempt submission
1471          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1472          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1473          * @return Status The resulting status object.
1474          */
1475         public function attemptSave( &$resultDetails = false ) {
1476                 # Allow bots to exempt some edits from bot flagging
1477                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1478                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1479
1480                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1481
1482                 return $status;
1483         }
1484
1485         /**
1486          * Log when a page was successfully saved after the edit conflict view
1487          */
1488         private function incrementResolvedConflicts() {
1489                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1490                         return;
1491                 }
1492
1493                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
1494                 $stats->increment( 'edit.failures.conflict.resolved' );
1495         }
1496
1497         /**
1498          * Handle status, such as after attempt save
1499          *
1500          * @param Status $status
1501          * @param array|bool $resultDetails
1502          *
1503          * @throws ErrorPageError
1504          * @return bool False, if output is done, true if rest of the form should be displayed
1505          */
1506         private function handleStatus( Status $status, $resultDetails ) {
1507                 /**
1508                  * @todo FIXME: once the interface for internalAttemptSave() is made
1509                  *   nicer, this should use the message in $status
1510                  */
1511                 if ( $status->value == self::AS_SUCCESS_UPDATE
1512                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1513                 ) {
1514                         $this->incrementResolvedConflicts();
1515
1516                         $this->didSave = true;
1517                         if ( !$resultDetails['nullEdit'] ) {
1518                                 $this->setPostEditCookie( $status->value );
1519                         }
1520                 }
1521
1522                 $out = $this->context->getOutput();
1523
1524                 // "wpExtraQueryRedirect" is a hidden input to modify
1525                 // after save URL and is not used by actual edit form
1526                 $request = $this->context->getRequest();
1527                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1528
1529                 switch ( $status->value ) {
1530                         case self::AS_HOOK_ERROR_EXPECTED:
1531                         case self::AS_CONTENT_TOO_BIG:
1532                         case self::AS_ARTICLE_WAS_DELETED:
1533                         case self::AS_CONFLICT_DETECTED:
1534                         case self::AS_SUMMARY_NEEDED:
1535                         case self::AS_TEXTBOX_EMPTY:
1536                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1537                         case self::AS_END:
1538                         case self::AS_BLANK_ARTICLE:
1539                         case self::AS_SELF_REDIRECT:
1540                                 return true;
1541
1542                         case self::AS_HOOK_ERROR:
1543                                 return false;
1544
1545                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1546                         case self::AS_PARSE_ERROR:
1547                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1548                                 return true;
1549
1550                         case self::AS_SUCCESS_NEW_ARTICLE:
1551                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1552                                 if ( $extraQueryRedirect ) {
1553                                         if ( $query === '' ) {
1554                                                 $query = $extraQueryRedirect;
1555                                         } else {
1556                                                 $query = $query . '&' . $extraQueryRedirect;
1557                                         }
1558                                 }
1559                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1560                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1561                                 return false;
1562
1563                         case self::AS_SUCCESS_UPDATE:
1564                                 $extraQuery = '';
1565                                 $sectionanchor = $resultDetails['sectionanchor'];
1566
1567                                 // Give extensions a chance to modify URL query on update
1568                                 Hooks::run(
1569                                         'ArticleUpdateBeforeRedirect',
1570                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1571                                 );
1572
1573                                 if ( $resultDetails['redirect'] ) {
1574                                         if ( $extraQuery == '' ) {
1575                                                 $extraQuery = 'redirect=no';
1576                                         } else {
1577                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1578                                         }
1579                                 }
1580                                 if ( $extraQueryRedirect ) {
1581                                         if ( $extraQuery === '' ) {
1582                                                 $extraQuery = $extraQueryRedirect;
1583                                         } else {
1584                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1585                                         }
1586                                 }
1587
1588                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1589                                 return false;
1590
1591                         case self::AS_SPAM_ERROR:
1592                                 $this->spamPageWithContent( $resultDetails['spam'] );
1593                                 return false;
1594
1595                         case self::AS_BLOCKED_PAGE_FOR_USER:
1596                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1597
1598                         case self::AS_IMAGE_REDIRECT_ANON:
1599                         case self::AS_IMAGE_REDIRECT_LOGGED:
1600                                 throw new PermissionsError( 'upload' );
1601
1602                         case self::AS_READ_ONLY_PAGE_ANON:
1603                         case self::AS_READ_ONLY_PAGE_LOGGED:
1604                                 throw new PermissionsError( 'edit' );
1605
1606                         case self::AS_READ_ONLY_PAGE:
1607                                 throw new ReadOnlyError;
1608
1609                         case self::AS_RATE_LIMITED:
1610                                 throw new ThrottledError();
1611
1612                         case self::AS_NO_CREATE_PERMISSION:
1613                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1614                                 throw new PermissionsError( $permission );
1615
1616                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1617                                 throw new PermissionsError( 'editcontentmodel' );
1618
1619                         default:
1620                                 // We don't recognize $status->value. The only way that can happen
1621                                 // is if an extension hook aborted from inside ArticleSave.
1622                                 // Render the status object into $this->hookError
1623                                 // FIXME this sucks, we should just use the Status object throughout
1624                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1625                                         '</div>';
1626                                 return true;
1627                 }
1628         }
1629
1630         /**
1631          * Run hooks that can filter edits just before they get saved.
1632          *
1633          * @param Content $content The Content to filter.
1634          * @param Status $status For reporting the outcome to the caller
1635          * @param User $user The user performing the edit
1636          *
1637          * @return bool
1638          */
1639         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1640                 // Run old style post-section-merge edit filter
1641                 if ( $this->hookError != '' ) {
1642                         # ...or the hook could be expecting us to produce an error
1643                         $status->fatal( 'hookaborted' );
1644                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1645                         return false;
1646                 }
1647
1648                 // Run new style post-section-merge edit filter
1649                 if ( !Hooks::run( 'EditFilterMergedContent',
1650                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1651                                 $user, $this->minoredit ] )
1652                 ) {
1653                         # Error messages etc. could be handled within the hook...
1654                         if ( $status->isGood() ) {
1655                                 $status->fatal( 'hookaborted' );
1656                                 // Not setting $this->hookError here is a hack to allow the hook
1657                                 // to cause a return to the edit page without $this->hookError
1658                                 // being set. This is used by ConfirmEdit to display a captcha
1659                                 // without any error message cruft.
1660                         } else {
1661                                 $this->hookError = $status->getWikiText();
1662                         }
1663                         // Use the existing $status->value if the hook set it
1664                         if ( !$status->value ) {
1665                                 $status->value = self::AS_HOOK_ERROR;
1666                         }
1667                         return false;
1668                 } elseif ( !$status->isOK() ) {
1669                         # ...or the hook could be expecting us to produce an error
1670                         // FIXME this sucks, we should just use the Status object throughout
1671                         $this->hookError = $status->getWikiText();
1672                         $status->fatal( 'hookaborted' );
1673                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1674                         return false;
1675                 }
1676
1677                 return true;
1678         }
1679
1680         /**
1681          * Return the summary to be used for a new section.
1682          *
1683          * @param string $sectionanchor Set to the section anchor text
1684          * @return string
1685          */
1686         private function newSectionSummary( &$sectionanchor = null ) {
1687                 global $wgParser;
1688
1689                 if ( $this->sectiontitle !== '' ) {
1690                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1691                         // If no edit summary was specified, create one automatically from the section
1692                         // title and have it link to the new section. Otherwise, respect the summary as
1693                         // passed.
1694                         if ( $this->summary === '' ) {
1695                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1696                                 return $this->context->msg( 'newsectionsummary' )
1697                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1698                         }
1699                 } elseif ( $this->summary !== '' ) {
1700                         $sectionanchor = $this->guessSectionName( $this->summary );
1701                         # This is a new section, so create a link to the new section
1702                         # in the revision summary.
1703                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1704                         return $this->context->msg( 'newsectionsummary' )
1705                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1706                 }
1707                 return $this->summary;
1708         }
1709
1710         /**
1711          * Attempt submission (no UI)
1712          *
1713          * @param array &$result Array to add statuses to, currently with the
1714          *   possible keys:
1715          *   - spam (string): Spam string from content if any spam is detected by
1716          *     matchSpamRegex.
1717          *   - sectionanchor (string): Section anchor for a section save.
1718          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1719          *     false otherwise.
1720          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1721          *     revision is a redirect.
1722          * @param bool $bot True if edit is being made under the bot right.
1723          *
1724          * @return Status Status object, possibly with a message, but always with
1725          *   one of the AS_* constants in $status->value,
1726          *
1727          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1728          *   various error display idiosyncrasies. There are also lots of cases
1729          *   where error metadata is set in the object and retrieved later instead
1730          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1731          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1732          * time.
1733          */
1734         public function internalAttemptSave( &$result, $bot = false ) {
1735                 global $wgMaxArticleSize;
1736                 global $wgContentHandlerUseDB;
1737
1738                 $status = Status::newGood();
1739                 $user = $this->context->getUser();
1740
1741                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1742                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1743                         $status->fatal( 'hookaborted' );
1744                         $status->value = self::AS_HOOK_ERROR;
1745                         return $status;
1746                 }
1747
1748                 $request = $this->context->getRequest();
1749                 $spam = $request->getText( 'wpAntispam' );
1750                 if ( $spam !== '' ) {
1751                         wfDebugLog(
1752                                 'SimpleAntiSpam',
1753                                 $user->getName() .
1754                                 ' editing "' .
1755                                 $this->mTitle->getPrefixedText() .
1756                                 '" submitted bogus field "' .
1757                                 $spam .
1758                                 '"'
1759                         );
1760                         $status->fatal( 'spamprotectionmatch', false );
1761                         $status->value = self::AS_SPAM_ERROR;
1762                         return $status;
1763                 }
1764
1765                 try {
1766                         # Construct Content object
1767                         $textbox_content = $this->toEditContent( $this->textbox1 );
1768                 } catch ( MWContentSerializationException $ex ) {
1769                         $status->fatal(
1770                                 'content-failed-to-parse',
1771                                 $this->contentModel,
1772                                 $this->contentFormat,
1773                                 $ex->getMessage()
1774                         );
1775                         $status->value = self::AS_PARSE_ERROR;
1776                         return $status;
1777                 }
1778
1779                 # Check image redirect
1780                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1781                         $textbox_content->isRedirect() &&
1782                         !$user->isAllowed( 'upload' )
1783                 ) {
1784                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1785                                 $status->setResult( false, $code );
1786
1787                                 return $status;
1788                 }
1789
1790                 # Check for spam
1791                 $match = self::matchSummarySpamRegex( $this->summary );
1792                 if ( $match === false && $this->section == 'new' ) {
1793                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1794                         # regular summaries, it is added to the actual wikitext.
1795                         if ( $this->sectiontitle !== '' ) {
1796                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1797                                 $match = self::matchSpamRegex( $this->sectiontitle );
1798                         } else {
1799                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1800                                 # is used with the 'summary' parameter.
1801                                 $match = self::matchSpamRegex( $this->summary );
1802                         }
1803                 }
1804                 if ( $match === false ) {
1805                         $match = self::matchSpamRegex( $this->textbox1 );
1806                 }
1807                 if ( $match !== false ) {
1808                         $result['spam'] = $match;
1809                         $ip = $request->getIP();
1810                         $pdbk = $this->mTitle->getPrefixedDBkey();
1811                         $match = str_replace( "\n", '', $match );
1812                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1813                         $status->fatal( 'spamprotectionmatch', $match );
1814                         $status->value = self::AS_SPAM_ERROR;
1815                         return $status;
1816                 }
1817                 if ( !Hooks::run(
1818                         'EditFilter',
1819                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1820                 ) {
1821                         # Error messages etc. could be handled within the hook...
1822                         $status->fatal( 'hookaborted' );
1823                         $status->value = self::AS_HOOK_ERROR;
1824                         return $status;
1825                 } elseif ( $this->hookError != '' ) {
1826                         # ...or the hook could be expecting us to produce an error
1827                         $status->fatal( 'hookaborted' );
1828                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1829                         return $status;
1830                 }
1831
1832                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1833                         // Auto-block user's IP if the account was "hard" blocked
1834                         if ( !wfReadOnly() ) {
1835                                 $user->spreadAnyEditBlock();
1836                         }
1837                         # Check block state against master, thus 'false'.
1838                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1839                         return $status;
1840                 }
1841
1842                 $this->contentLength = strlen( $this->textbox1 );
1843                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1844                         // Error will be displayed by showEditForm()
1845                         $this->tooBig = true;
1846                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1847                         return $status;
1848                 }
1849
1850                 if ( !$user->isAllowed( 'edit' ) ) {
1851                         if ( $user->isAnon() ) {
1852                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1853                                 return $status;
1854                         } else {
1855                                 $status->fatal( 'readonlytext' );
1856                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1857                                 return $status;
1858                         }
1859                 }
1860
1861                 $changingContentModel = false;
1862                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1863                         if ( !$wgContentHandlerUseDB ) {
1864                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1865                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1866                                 return $status;
1867                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1868                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1869                                 return $status;
1870                         }
1871                         // Make sure the user can edit the page under the new content model too
1872                         $titleWithNewContentModel = clone $this->mTitle;
1873                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1874                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1875                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1876                         ) {
1877                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1878                                 return $status;
1879                         }
1880
1881                         $changingContentModel = true;
1882                         $oldContentModel = $this->mTitle->getContentModel();
1883                 }
1884
1885                 if ( $this->changeTags ) {
1886                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1887                                 $this->changeTags, $user );
1888                         if ( !$changeTagsStatus->isOK() ) {
1889                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1890                                 return $changeTagsStatus;
1891                         }
1892                 }
1893
1894                 if ( wfReadOnly() ) {
1895                         $status->fatal( 'readonlytext' );
1896                         $status->value = self::AS_READ_ONLY_PAGE;
1897                         return $status;
1898                 }
1899                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1900                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1901                 ) {
1902                         $status->fatal( 'actionthrottledtext' );
1903                         $status->value = self::AS_RATE_LIMITED;
1904                         return $status;
1905                 }
1906
1907                 # If the article has been deleted while editing, don't save it without
1908                 # confirmation
1909                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1910                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1911                         return $status;
1912                 }
1913
1914                 # Load the page data from the master. If anything changes in the meantime,
1915                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1916                 $this->page->loadPageData( 'fromdbmaster' );
1917                 $new = !$this->page->exists();
1918
1919                 if ( $new ) {
1920                         // Late check for create permission, just in case *PARANOIA*
1921                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
1922                                 $status->fatal( 'nocreatetext' );
1923                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1924                                 wfDebug( __METHOD__ . ": no create permission\n" );
1925                                 return $status;
1926                         }
1927
1928                         // Don't save a new page if it's blank or if it's a MediaWiki:
1929                         // message with content equivalent to default (allow empty pages
1930                         // in this case to disable messages, see T52124)
1931                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1932                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1933                                 $defaultText = $defaultMessageText;
1934                         } else {
1935                                 $defaultText = '';
1936                         }
1937
1938                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1939                                 $this->blankArticle = true;
1940                                 $status->fatal( 'blankarticle' );
1941                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1942                                 return $status;
1943                         }
1944
1945                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
1946                                 return $status;
1947                         }
1948
1949                         $content = $textbox_content;
1950
1951                         $result['sectionanchor'] = '';
1952                         if ( $this->section == 'new' ) {
1953                                 if ( $this->sectiontitle !== '' ) {
1954                                         // Insert the section title above the content.
1955                                         $content = $content->addSectionHeader( $this->sectiontitle );
1956                                 } elseif ( $this->summary !== '' ) {
1957                                         // Insert the section title above the content.
1958                                         $content = $content->addSectionHeader( $this->summary );
1959                                 }
1960                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1961                         }
1962
1963                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1964
1965                 } else { # not $new
1966
1967                         # Article exists. Check for edit conflict.
1968
1969                         $this->page->clear(); # Force reload of dates, etc.
1970                         $timestamp = $this->page->getTimestamp();
1971                         $latest = $this->page->getLatest();
1972
1973                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1974
1975                         // Check editRevId if set, which handles same-second timestamp collisions
1976                         if ( $timestamp != $this->edittime
1977                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1978                         ) {
1979                                 $this->isConflict = true;
1980                                 if ( $this->section == 'new' ) {
1981                                         if ( $this->page->getUserText() == $user->getName() &&
1982                                                 $this->page->getComment() == $this->newSectionSummary()
1983                                         ) {
1984                                                 // Probably a duplicate submission of a new comment.
1985                                                 // This can happen when CDN resends a request after
1986                                                 // a timeout but the first one actually went through.
1987                                                 wfDebug( __METHOD__
1988                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1989                                         } else {
1990                                                 // New comment; suppress conflict.
1991                                                 $this->isConflict = false;
1992                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1993                                         }
1994                                 } elseif ( $this->section == ''
1995                                         && Revision::userWasLastToEdit(
1996                                                 DB_MASTER, $this->mTitle->getArticleID(),
1997                                                 $user->getId(), $this->edittime
1998                                         )
1999                                 ) {
2000                                         # Suppress edit conflict with self, except for section edits where merging is required.
2001                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2002                                         $this->isConflict = false;
2003                                 }
2004                         }
2005
2006                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2007                         if ( $this->sectiontitle !== '' ) {
2008                                 $sectionTitle = $this->sectiontitle;
2009                         } else {
2010                                 $sectionTitle = $this->summary;
2011                         }
2012
2013                         $content = null;
2014
2015                         if ( $this->isConflict ) {
2016                                 wfDebug( __METHOD__
2017                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2018                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2019                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2020                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2021                                 if ( $this->editRevId !== null ) {
2022                                         $content = $this->page->replaceSectionAtRev(
2023                                                 $this->section,
2024                                                 $textbox_content,
2025                                                 $sectionTitle,
2026                                                 $this->editRevId
2027                                         );
2028                                 } else {
2029                                         $content = $this->page->replaceSectionContent(
2030                                                 $this->section,
2031                                                 $textbox_content,
2032                                                 $sectionTitle,
2033                                                 $this->edittime
2034                                         );
2035                                 }
2036                         } else {
2037                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2038                                 $content = $this->page->replaceSectionContent(
2039                                         $this->section,
2040                                         $textbox_content,
2041                                         $sectionTitle
2042                                 );
2043                         }
2044
2045                         if ( is_null( $content ) ) {
2046                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2047                                 $this->isConflict = true;
2048                                 $content = $textbox_content; // do not try to merge here!
2049                         } elseif ( $this->isConflict ) {
2050                                 # Attempt merge
2051                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2052                                         // Successful merge! Maybe we should tell the user the good news?
2053                                         $this->isConflict = false;
2054                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2055                                 } else {
2056                                         $this->section = '';
2057                                         $this->textbox1 = ContentHandler::getContentText( $content );
2058                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2059                                 }
2060                         }
2061
2062                         if ( $this->isConflict ) {
2063                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2064                                 return $status;
2065                         }
2066
2067                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2068                                 return $status;
2069                         }
2070
2071                         if ( $this->section == 'new' ) {
2072                                 // Handle the user preference to force summaries here
2073                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2074                                         $this->missingSummary = true;
2075                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2076                                         $status->value = self::AS_SUMMARY_NEEDED;
2077                                         return $status;
2078                                 }
2079
2080                                 // Do not allow the user to post an empty comment
2081                                 if ( $this->textbox1 == '' ) {
2082                                         $this->missingComment = true;
2083                                         $status->fatal( 'missingcommenttext' );
2084                                         $status->value = self::AS_TEXTBOX_EMPTY;
2085                                         return $status;
2086                                 }
2087                         } elseif ( !$this->allowBlankSummary
2088                                 && !$content->equals( $this->getOriginalContent( $user ) )
2089                                 && !$content->isRedirect()
2090                                 && md5( $this->summary ) == $this->autoSumm
2091                         ) {
2092                                 $this->missingSummary = true;
2093                                 $status->fatal( 'missingsummary' );
2094                                 $status->value = self::AS_SUMMARY_NEEDED;
2095                                 return $status;
2096                         }
2097
2098                         # All's well
2099                         $sectionanchor = '';
2100                         if ( $this->section == 'new' ) {
2101                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2102                         } elseif ( $this->section != '' ) {
2103                                 # Try to get a section anchor from the section source, redirect
2104                                 # to edited section if header found.
2105                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2106                                 # for duplicate heading checking and maybe parsing.
2107                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2108                                 # We can't deal with anchors, includes, html etc in the header for now,
2109                                 # headline would need to be parsed to improve this.
2110                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2111                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2112                                 }
2113                         }
2114                         $result['sectionanchor'] = $sectionanchor;
2115
2116                         // Save errors may fall down to the edit form, but we've now
2117                         // merged the section into full text. Clear the section field
2118                         // so that later submission of conflict forms won't try to
2119                         // replace that into a duplicated mess.
2120                         $this->textbox1 = $this->toEditText( $content );
2121                         $this->section = '';
2122
2123                         $status->value = self::AS_SUCCESS_UPDATE;
2124                 }
2125
2126                 if ( !$this->allowSelfRedirect
2127                         && $content->isRedirect()
2128                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2129                 ) {
2130                         // If the page already redirects to itself, don't warn.
2131                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2132                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2133                                 $this->selfRedirect = true;
2134                                 $status->fatal( 'selfredirect' );
2135                                 $status->value = self::AS_SELF_REDIRECT;
2136                                 return $status;
2137                         }
2138                 }
2139
2140                 // Check for length errors again now that the section is merged in
2141                 $this->contentLength = strlen( $this->toEditText( $content ) );
2142                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2143                         $this->tooBig = true;
2144                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2145                         return $status;
2146                 }
2147
2148                 $flags = EDIT_AUTOSUMMARY |
2149                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2150                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2151                         ( $bot ? EDIT_FORCE_BOT : 0 );
2152
2153                 $doEditStatus = $this->page->doEditContent(
2154                         $content,
2155                         $this->summary,
2156                         $flags,
2157                         false,
2158                         $user,
2159                         $content->getDefaultFormat(),
2160                         $this->changeTags,
2161                         $this->undidRev
2162                 );
2163
2164                 if ( !$doEditStatus->isOK() ) {
2165                         // Failure from doEdit()
2166                         // Show the edit conflict page for certain recognized errors from doEdit(),
2167                         // but don't show it for errors from extension hooks
2168                         $errors = $doEditStatus->getErrorsArray();
2169                         if ( in_array( $errors[0][0],
2170                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2171                         ) {
2172                                 $this->isConflict = true;
2173                                 // Destroys data doEdit() put in $status->value but who cares
2174                                 $doEditStatus->value = self::AS_END;
2175                         }
2176                         return $doEditStatus;
2177                 }
2178
2179                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2180                 if ( $result['nullEdit'] ) {
2181                         // We don't know if it was a null edit until now, so increment here
2182                         $user->pingLimiter( 'linkpurge' );
2183                 }
2184                 $result['redirect'] = $content->isRedirect();
2185
2186                 $this->updateWatchlist();
2187
2188                 // If the content model changed, add a log entry
2189                 if ( $changingContentModel ) {
2190                         $this->addContentModelChangeLogEntry(
2191                                 $user,
2192                                 $new ? false : $oldContentModel,
2193                                 $this->contentModel,
2194                                 $this->summary
2195                         );
2196                 }
2197
2198                 return $status;
2199         }
2200
2201         /**
2202          * @param User $user
2203          * @param string|false $oldModel false if the page is being newly created
2204          * @param string $newModel
2205          * @param string $reason
2206          */
2207         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2208                 $new = $oldModel === false;
2209                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2210                 $log->setPerformer( $user );
2211                 $log->setTarget( $this->mTitle );
2212                 $log->setComment( $reason );
2213                 $log->setParameters( [
2214                         '4::oldmodel' => $oldModel,
2215                         '5::newmodel' => $newModel
2216                 ] );
2217                 $logid = $log->insert();
2218                 $log->publish( $logid );
2219         }
2220
2221         /**
2222          * Register the change of watch status
2223          */
2224         protected function updateWatchlist() {
2225                 $user = $this->context->getUser();
2226                 if ( !$user->isLoggedIn() ) {
2227                         return;
2228                 }
2229
2230                 $title = $this->mTitle;
2231                 $watch = $this->watchthis;
2232                 // Do this in its own transaction to reduce contention...
2233                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2234                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2235                                 return; // nothing to change
2236                         }
2237                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2238                 } );
2239         }
2240
2241         /**
2242          * Attempts to do 3-way merge of edit content with a base revision
2243          * and current content, in case of edit conflict, in whichever way appropriate
2244          * for the content type.
2245          *
2246          * @since 1.21
2247          *
2248          * @param Content $editContent
2249          *
2250          * @return bool
2251          */
2252         private function mergeChangesIntoContent( &$editContent ) {
2253                 $db = wfGetDB( DB_MASTER );
2254
2255                 // This is the revision the editor started from
2256                 $baseRevision = $this->getBaseRevision();
2257                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2258
2259                 if ( is_null( $baseContent ) ) {
2260                         return false;
2261                 }
2262
2263                 // The current state, we want to merge updates into it
2264                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2265                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2266
2267                 if ( is_null( $currentContent ) ) {
2268                         return false;
2269                 }
2270
2271                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2272
2273                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2274
2275                 if ( $result ) {
2276                         $editContent = $result;
2277                         // Update parentRevId to what we just merged.
2278                         $this->parentRevId = $currentRevision->getId();
2279                         return true;
2280                 }
2281
2282                 return false;
2283         }
2284
2285         /**
2286          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2287          *        one might think of X as the "base revision", which is NOT what this returns.
2288          * @return Revision Current version when the edit was started
2289          */
2290         public function getBaseRevision() {
2291                 if ( !$this->mBaseRevision ) {
2292                         $db = wfGetDB( DB_MASTER );
2293                         $this->mBaseRevision = $this->editRevId
2294                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2295                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2296                 }
2297                 return $this->mBaseRevision;
2298         }
2299
2300         /**
2301          * Check given input text against $wgSpamRegex, and return the text of the first match.
2302          *
2303          * @param string $text
2304          *
2305          * @return string|bool Matching string or false
2306          */
2307         public static function matchSpamRegex( $text ) {
2308                 global $wgSpamRegex;
2309                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2310                 $regexes = (array)$wgSpamRegex;
2311                 return self::matchSpamRegexInternal( $text, $regexes );
2312         }
2313
2314         /**
2315          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2316          *
2317          * @param string $text
2318          *
2319          * @return string|bool Matching string or false
2320          */
2321         public static function matchSummarySpamRegex( $text ) {
2322                 global $wgSummarySpamRegex;
2323                 $regexes = (array)$wgSummarySpamRegex;
2324                 return self::matchSpamRegexInternal( $text, $regexes );
2325         }
2326
2327         /**
2328          * @param string $text
2329          * @param array $regexes
2330          * @return bool|string
2331          */
2332         protected static function matchSpamRegexInternal( $text, $regexes ) {
2333                 foreach ( $regexes as $regex ) {
2334                         $matches = [];
2335                         if ( preg_match( $regex, $text, $matches ) ) {
2336                                 return $matches[0];
2337                         }
2338                 }
2339                 return false;
2340         }
2341
2342         public function setHeaders() {
2343                 global $wgAjaxEditStash;
2344
2345                 $out = $this->context->getOutput();
2346
2347                 $out->addModules( 'mediawiki.action.edit' );
2348                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2349
2350                 $user = $this->context->getUser();
2351                 if ( $user->getOption( 'showtoolbar' ) ) {
2352                         // The addition of default buttons is handled by getEditToolbar() which
2353                         // has its own dependency on this module. The call here ensures the module
2354                         // is loaded in time (it has position "top") for other modules to register
2355                         // buttons (e.g. extensions, gadgets, user scripts).
2356                         $out->addModules( 'mediawiki.toolbar' );
2357                 }
2358
2359                 if ( $user->getOption( 'uselivepreview' ) ) {
2360                         $out->addModules( 'mediawiki.action.edit.preview' );
2361                 }
2362
2363                 if ( $user->getOption( 'useeditwarning' ) ) {
2364                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2365                 }
2366
2367                 # Enabled article-related sidebar, toplinks, etc.
2368                 $out->setArticleRelated( true );
2369
2370                 $contextTitle = $this->getContextTitle();
2371                 if ( $this->isConflict ) {
2372                         $msg = 'editconflict';
2373                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2374                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2375                 } else {
2376                         $msg = $contextTitle->exists()
2377                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2378                                         && $contextTitle->getDefaultMessageText() !== false
2379                                 )
2380                                 ? 'editing'
2381                                 : 'creating';
2382                 }
2383
2384                 # Use the title defined by DISPLAYTITLE magic word when present
2385                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2386                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2387                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2388                 if ( $displayTitle === false ) {
2389                         $displayTitle = $contextTitle->getPrefixedText();
2390                 }
2391                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2392                 # Transmit the name of the message to JavaScript for live preview
2393                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2394                 $out->addJsConfigVars( [
2395                         'wgEditMessage' => $msg,
2396                         'wgAjaxEditStash' => $wgAjaxEditStash,
2397                 ] );
2398         }
2399
2400         /**
2401          * Show all applicable editing introductions
2402          */
2403         protected function showIntro() {
2404                 if ( $this->suppressIntro ) {
2405                         return;
2406                 }
2407
2408                 $out = $this->context->getOutput();
2409                 $namespace = $this->mTitle->getNamespace();
2410
2411                 if ( $namespace == NS_MEDIAWIKI ) {
2412                         # Show a warning if editing an interface message
2413                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2414                         # If this is a default message (but not css or js),
2415                         # show a hint that it is translatable on translatewiki.net
2416                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2417                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2418                         ) {
2419                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2420                                 if ( $defaultMessageText !== false ) {
2421                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2422                                                 'translateinterface' );
2423                                 }
2424                         }
2425                 } elseif ( $namespace == NS_FILE ) {
2426                         # Show a hint to shared repo
2427                         $file = wfFindFile( $this->mTitle );
2428                         if ( $file && !$file->isLocal() ) {
2429                                 $descUrl = $file->getDescriptionUrl();
2430                                 # there must be a description url to show a hint to shared repo
2431                                 if ( $descUrl ) {
2432                                         if ( !$this->mTitle->exists() ) {
2433                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2434                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2435                                                 ] );
2436                                         } else {
2437                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2438                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2439                                                 ] );
2440                                         }
2441                                 }
2442                         }
2443                 }
2444
2445                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2446                 # Show log extract when the user is currently blocked
2447                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2448                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2449                         $user = User::newFromName( $username, false /* allow IP users */ );
2450                         $ip = User::isIP( $username );
2451                         $block = Block::newFromTarget( $user, $user );
2452                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2453                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2454                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2455                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2456                                 # Show log extract if the user is currently blocked
2457                                 LogEventsList::showLogExtract(
2458                                         $out,
2459                                         'block',
2460                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2461                                         '',
2462                                         [
2463                                                 'lim' => 1,
2464                                                 'showIfEmpty' => false,
2465                                                 'msgKey' => [
2466                                                         'blocked-notice-logextract',
2467                                                         $user->getName() # Support GENDER in notice
2468                                                 ]
2469                                         ]
2470                                 );
2471                         }
2472                 }
2473                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2474                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2475                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2476                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2477                         ) );
2478                         if ( $this->context->getUser()->isLoggedIn() ) {
2479                                 $out->wrapWikiMsg(
2480                                         // Suppress the external link icon, consider the help url an internal one
2481                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2482                                         [
2483                                                 'newarticletext',
2484                                                 $helpLink
2485                                         ]
2486                                 );
2487                         } else {
2488                                 $out->wrapWikiMsg(
2489                                         // Suppress the external link icon, consider the help url an internal one
2490                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2491                                         [
2492                                                 'newarticletextanon',
2493                                                 $helpLink
2494                                         ]
2495                                 );
2496                         }
2497                 }
2498                 # Give a notice if the user is editing a deleted/moved page...
2499                 if ( !$this->mTitle->exists() ) {
2500                         $dbr = wfGetDB( DB_REPLICA );
2501
2502                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2503                                 '',
2504                                 [
2505                                         'lim' => 10,
2506                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2507                                         'showIfEmpty' => false,
2508                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2509                                 ]
2510                         );
2511                 }
2512         }
2513
2514         /**
2515          * Attempt to show a custom editing introduction, if supplied
2516          *
2517          * @return bool
2518          */
2519         protected function showCustomIntro() {
2520                 if ( $this->editintro ) {
2521                         $title = Title::newFromText( $this->editintro );
2522                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2523                                 // Added using template syntax, to take <noinclude>'s into account.
2524                                 $this->context->getOutput()->addWikiTextTitleTidy(
2525                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2526                                         $this->mTitle
2527                                 );
2528                                 return true;
2529                         }
2530                 }
2531                 return false;
2532         }
2533
2534         /**
2535          * Gets an editable textual representation of $content.
2536          * The textual representation can be turned by into a Content object by the
2537          * toEditContent() method.
2538          *
2539          * If $content is null or false or a string, $content is returned unchanged.
2540          *
2541          * If the given Content object is not of a type that can be edited using
2542          * the text base EditPage, an exception will be raised. Set
2543          * $this->allowNonTextContent to true to allow editing of non-textual
2544          * content.
2545          *
2546          * @param Content|null|bool|string $content
2547          * @return string The editable text form of the content.
2548          *
2549          * @throws MWException If $content is not an instance of TextContent and
2550          *   $this->allowNonTextContent is not true.
2551          */
2552         protected function toEditText( $content ) {
2553                 if ( $content === null || $content === false || is_string( $content ) ) {
2554                         return $content;
2555                 }
2556
2557                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2558                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2559                 }
2560
2561                 return $content->serialize( $this->contentFormat );
2562         }
2563
2564         /**
2565          * Turns the given text into a Content object by unserializing it.
2566          *
2567          * If the resulting Content object is not of a type that can be edited using
2568          * the text base EditPage, an exception will be raised. Set
2569          * $this->allowNonTextContent to true to allow editing of non-textual
2570          * content.
2571          *
2572          * @param string|null|bool $text Text to unserialize
2573          * @return Content|bool|null The content object created from $text. If $text was false
2574          *   or null, false resp. null will be  returned instead.
2575          *
2576          * @throws MWException If unserializing the text results in a Content
2577          *   object that is not an instance of TextContent and
2578          *   $this->allowNonTextContent is not true.
2579          */
2580         protected function toEditContent( $text ) {
2581                 if ( $text === false || $text === null ) {
2582                         return $text;
2583                 }
2584
2585                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2586                         $this->contentModel, $this->contentFormat );
2587
2588                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2589                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2590                 }
2591
2592                 return $content;
2593         }
2594
2595         /**
2596          * Send the edit form and related headers to OutputPage
2597          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2598          *     during form output near the top, for captchas and the like.
2599          *
2600          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2601          * use the EditPage::showEditForm:fields hook instead.
2602          */
2603         public function showEditForm( $formCallback = null ) {
2604                 # need to parse the preview early so that we know which templates are used,
2605                 # otherwise users with "show preview after edit box" will get a blank list
2606                 # we parse this near the beginning so that setHeaders can do the title
2607                 # setting work instead of leaving it in getPreviewText
2608                 $previewOutput = '';
2609                 if ( $this->formtype == 'preview' ) {
2610                         $previewOutput = $this->getPreviewText();
2611                 }
2612
2613                 $out = $this->context->getOutput();
2614
2615                 // Avoid PHP 7.1 warning of passing $this by reference
2616                 $editPage = $this;
2617                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2618
2619                 $this->setHeaders();
2620
2621                 $this->addTalkPageText();
2622                 $this->addEditNotices();
2623
2624                 if ( !$this->isConflict &&
2625                         $this->section != '' &&
2626                         !$this->isSectionEditSupported() ) {
2627                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2628                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2629                         // Someone is welcome to try refactoring though
2630                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2631                         return;
2632                 }
2633
2634                 $this->showHeader();
2635
2636                 $out->addHTML( $this->editFormPageTop );
2637
2638                 $user = $this->context->getUser();
2639                 if ( $user->getOption( 'previewontop' ) ) {
2640                         $this->displayPreviewArea( $previewOutput, true );
2641                 }
2642
2643                 $out->addHTML( $this->editFormTextTop );
2644
2645                 $showToolbar = true;
2646                 if ( $this->wasDeletedSinceLastEdit() ) {
2647                         if ( $this->formtype == 'save' ) {
2648                                 // Hide the toolbar and edit area, user can click preview to get it back
2649                                 // Add an confirmation checkbox and explanation.
2650                                 $showToolbar = false;
2651                         } else {
2652                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2653                                         'deletedwhileediting' );
2654                         }
2655                 }
2656
2657                 // @todo add EditForm plugin interface and use it here!
2658                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2659                 $out->addHTML( Html::openElement(
2660                         'form',
2661                         [
2662                                 'class' => 'mw-editform',
2663                                 'id' => self::EDITFORM_ID,
2664                                 'name' => self::EDITFORM_ID,
2665                                 'method' => 'post',
2666                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2667                                 'enctype' => 'multipart/form-data'
2668                         ]
2669                 ) );
2670
2671                 if ( is_callable( $formCallback ) ) {
2672                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2673                         call_user_func_array( $formCallback, [ &$out ] );
2674                 }
2675
2676                 // Add an empty field to trip up spambots
2677                 $out->addHTML(
2678                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2679                         . Html::rawElement(
2680                                 'label',
2681                                 [ 'for' => 'wpAntispam' ],
2682                                 $this->context->msg( 'simpleantispam-label' )->parse()
2683                         )
2684                         . Xml::element(
2685                                 'input',
2686                                 [
2687                                         'type' => 'text',
2688                                         'name' => 'wpAntispam',
2689                                         'id' => 'wpAntispam',
2690                                         'value' => ''
2691                                 ]
2692                         )
2693                         . Xml::closeElement( 'div' )
2694                 );
2695
2696                 // Avoid PHP 7.1 warning of passing $this by reference
2697                 $editPage = $this;
2698                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2699
2700                 // Put these up at the top to ensure they aren't lost on early form submission
2701                 $this->showFormBeforeText();
2702
2703                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2704                         $username = $this->lastDelete->user_name;
2705                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2706
2707                         // It is better to not parse the comment at all than to have templates expanded in the middle
2708                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2709                         $key = $comment === ''
2710                                 ? 'confirmrecreate-noreason'
2711                                 : 'confirmrecreate';
2712                         $out->addHTML(
2713                                 '<div class="mw-confirm-recreate">' .
2714                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2715                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2716                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2717                                 ) .
2718                                 '</div>'
2719                         );
2720                 }
2721
2722                 # When the summary is hidden, also hide them on preview/show changes
2723                 if ( $this->nosummary ) {
2724                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2725                 }
2726
2727                 # If a blank edit summary was previously provided, and the appropriate
2728                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2729                 # user being bounced back more than once in the event that a summary
2730                 # is not required.
2731                 # ####
2732                 # For a bit more sophisticated detection of blank summaries, hash the
2733                 # automatic one and pass that in the hidden field wpAutoSummary.
2734                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2735                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2736                 }
2737
2738                 if ( $this->undidRev ) {
2739                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2740                 }
2741
2742                 if ( $this->selfRedirect ) {
2743                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2744                 }
2745
2746                 if ( $this->hasPresetSummary ) {
2747                         // If a summary has been preset using &summary= we don't want to prompt for
2748                         // a different summary. Only prompt for a summary if the summary is blanked.
2749                         // (T19416)
2750                         $this->autoSumm = md5( '' );
2751                 }
2752
2753                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2754                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2755
2756                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2757                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2758
2759                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2760                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2761
2762                 $out->enableOOUI();
2763
2764                 if ( $this->section == 'new' ) {
2765                         $this->showSummaryInput( true, $this->summary );
2766                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2767                 }
2768
2769                 $out->addHTML( $this->editFormTextBeforeContent );
2770
2771                 if ( !$this->isCssJsSubpage && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2772                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2773                 }
2774
2775                 if ( $this->blankArticle ) {
2776                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2777                 }
2778
2779                 if ( $this->isConflict ) {
2780                         // In an edit conflict bypass the overridable content form method
2781                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2782                         // resolved between page source edits and custom ui edits using the
2783                         // custom edit ui.
2784                         $this->textbox2 = $this->textbox1;
2785
2786                         $content = $this->getCurrentContent();
2787                         $this->textbox1 = $this->toEditText( $content );
2788
2789                         $this->showTextbox1();
2790                 } else {
2791                         $this->showContentForm();
2792                 }
2793
2794                 $out->addHTML( $this->editFormTextAfterContent );
2795
2796                 $this->showStandardInputs();
2797
2798                 $this->showFormAfterText();
2799
2800                 $this->showTosSummary();
2801
2802                 $this->showEditTools();
2803
2804                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2805
2806                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2807
2808                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2809                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2810
2811                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2812                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2813
2814                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2815
2816                 if ( $this->isConflict ) {
2817                         try {
2818                                 $this->showConflict();
2819                         } catch ( MWContentSerializationException $ex ) {
2820                                 // this can't really happen, but be nice if it does.
2821                                 $msg = $this->context->msg(
2822                                         'content-failed-to-parse',
2823                                         $this->contentModel,
2824                                         $this->contentFormat,
2825                                         $ex->getMessage()
2826                                 );
2827                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2828                         }
2829                 }
2830
2831                 // Set a hidden field so JS knows what edit form mode we are in
2832                 if ( $this->isConflict ) {
2833                         $mode = 'conflict';
2834                 } elseif ( $this->preview ) {
2835                         $mode = 'preview';
2836                 } elseif ( $this->diff ) {
2837                         $mode = 'diff';
2838                 } else {
2839                         $mode = 'text';
2840                 }
2841                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2842
2843                 // Marker for detecting truncated form data.  This must be the last
2844                 // parameter sent in order to be of use, so do not move me.
2845                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2846                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2847
2848                 if ( !$user->getOption( 'previewontop' ) ) {
2849                         $this->displayPreviewArea( $previewOutput, false );
2850                 }
2851         }
2852
2853         /**
2854          * Wrapper around TemplatesOnThisPageFormatter to make
2855          * a "templates on this page" list.
2856          *
2857          * @param Title[] $templates
2858          * @return string HTML
2859          */
2860         public function makeTemplatesOnThisPageList( array $templates ) {
2861                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2862                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2863                 );
2864
2865                 // preview if preview, else section if section, else false
2866                 $type = false;
2867                 if ( $this->preview ) {
2868                         $type = 'preview';
2869                 } elseif ( $this->section != '' ) {
2870                         $type = 'section';
2871                 }
2872
2873                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2874                         $templateListFormatter->format( $templates, $type )
2875                 );
2876         }
2877
2878         /**
2879          * Extract the section title from current section text, if any.
2880          *
2881          * @param string $text
2882          * @return string|bool String or false
2883          */
2884         public static function extractSectionTitle( $text ) {
2885                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2886                 if ( !empty( $matches[2] ) ) {
2887                         global $wgParser;
2888                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2889                 } else {
2890                         return false;
2891                 }
2892         }
2893
2894         protected function showHeader() {
2895                 global $wgAllowUserCss, $wgAllowUserJs;
2896
2897                 $out = $this->context->getOutput();
2898                 $user = $this->context->getUser();
2899                 if ( $this->isConflict ) {
2900                         $this->addExplainConflictHeader( $out );
2901                         $this->editRevId = $this->page->getLatest();
2902                 } else {
2903                         if ( $this->section != '' && $this->section != 'new' ) {
2904                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2905                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2906                                         if ( $sectionTitle !== false ) {
2907                                                 $this->summary = "/* $sectionTitle */ ";
2908                                         }
2909                                 }
2910                         }
2911
2912                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
2913
2914                         if ( $this->missingComment ) {
2915                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2916                         }
2917
2918                         if ( $this->missingSummary && $this->section != 'new' ) {
2919                                 $out->wrapWikiMsg(
2920                                         "<div id='mw-missingsummary'>\n$1\n</div>",
2921                                         [ 'missingsummary', $buttonLabel ]
2922                                 );
2923                         }
2924
2925                         if ( $this->missingSummary && $this->section == 'new' ) {
2926                                 $out->wrapWikiMsg(
2927                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
2928                                         [ 'missingcommentheader', $buttonLabel ]
2929                                 );
2930                         }
2931
2932                         if ( $this->blankArticle ) {
2933                                 $out->wrapWikiMsg(
2934                                         "<div id='mw-blankarticle'>\n$1\n</div>",
2935                                         [ 'blankarticle', $buttonLabel ]
2936                                 );
2937                         }
2938
2939                         if ( $this->selfRedirect ) {
2940                                 $out->wrapWikiMsg(
2941                                         "<div id='mw-selfredirect'>\n$1\n</div>",
2942                                         [ 'selfredirect', $buttonLabel ]
2943                                 );
2944                         }
2945
2946                         if ( $this->hookError !== '' ) {
2947                                 $out->addWikiText( $this->hookError );
2948                         }
2949
2950                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2951                                 $out->addWikiMsg( 'nonunicodebrowser' );
2952                         }
2953
2954                         if ( $this->section != 'new' ) {
2955                                 $revision = $this->mArticle->getRevisionFetched();
2956                                 if ( $revision ) {
2957                                         // Let sysop know that this will make private content public if saved
2958
2959                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
2960                                                 $out->wrapWikiMsg(
2961                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2962                                                         'rev-deleted-text-permission'
2963                                                 );
2964                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2965                                                 $out->wrapWikiMsg(
2966                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2967                                                         'rev-deleted-text-view'
2968                                                 );
2969                                         }
2970
2971                                         if ( !$revision->isCurrent() ) {
2972                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2973                                                 $out->addWikiMsg( 'editingold' );
2974                                                 $this->isOldRev = true;
2975                                         }
2976                                 } elseif ( $this->mTitle->exists() ) {
2977                                         // Something went wrong
2978
2979                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2980                                                 [ 'missing-revision', $this->oldid ] );
2981                                 }
2982                         }
2983                 }
2984
2985                 if ( wfReadOnly() ) {
2986                         $out->wrapWikiMsg(
2987                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2988                                 [ 'readonlywarning', wfReadOnlyReason() ]
2989                         );
2990                 } elseif ( $user->isAnon() ) {
2991                         if ( $this->formtype != 'preview' ) {
2992                                 $out->wrapWikiMsg(
2993                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2994                                         [ 'anoneditwarning',
2995                                                 // Log-in link
2996                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2997                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2998                                                 ] ),
2999                                                 // Sign-up link
3000                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3001                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3002                                                 ] )
3003                                         ]
3004                                 );
3005                         } else {
3006                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3007                                         'anonpreviewwarning'
3008                                 );
3009                         }
3010                 } else {
3011                         if ( $this->isCssJsSubpage ) {
3012                                 # Check the skin exists
3013                                 if ( $this->isWrongCaseCssJsPage ) {
3014                                         $out->wrapWikiMsg(
3015                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3016                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3017                                         );
3018                                 }
3019                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3020                                         $out->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3021                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3022                                         );
3023                                         if ( $this->formtype !== 'preview' ) {
3024                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3025                                                         $out->wrapWikiMsg(
3026                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3027                                                                 [ 'usercssyoucanpreview' ]
3028                                                         );
3029                                                 }
3030
3031                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3032                                                         $out->wrapWikiMsg(
3033                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3034                                                                 [ 'userjsyoucanpreview' ]
3035                                                         );
3036                                                 }
3037                                         }
3038                                 }
3039                         }
3040                 }
3041
3042                 $this->addPageProtectionWarningHeaders();
3043
3044                 $this->addLongPageWarningHeader();
3045
3046                 # Add header copyright warning
3047                 $this->showHeaderCopyrightWarning();
3048         }
3049
3050         /**
3051          * Helper function for summary input functions, which returns the neccessary
3052          * attributes for the input.
3053          *
3054          * @param array|null $inputAttrs Array of attrs to use on the input
3055          * @return array
3056          */
3057         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3058                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3059                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3060                         'id' => 'wpSummary',
3061                         'name' => 'wpSummary',
3062                         'maxlength' => '200',
3063                         'tabindex' => 1,
3064                         'size' => 60,
3065                         'spellcheck' => 'true',
3066                 ];
3067         }
3068
3069         /**
3070          * Standard summary input and label (wgSummary), abstracted so EditPage
3071          * subclasses may reorganize the form.
3072          * Note that you do not need to worry about the label's for=, it will be
3073          * inferred by the id given to the input. You can remove them both by
3074          * passing [ 'id' => false ] to $userInputAttrs.
3075          *
3076          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3077          * @param string $summary The value of the summary input
3078          * @param string $labelText The html to place inside the label
3079          * @param array $inputAttrs Array of attrs to use on the input
3080          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3081          * @return array An array in the format [ $label, $input ]
3082          */
3083         public function getSummaryInput( $summary = "", $labelText = null,
3084                 $inputAttrs = null, $spanLabelAttrs = null
3085         ) {
3086                 wfDeprecated( __METHOD__, '1.30' );
3087                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3088                 $inputAttrs += Linker::tooltipAndAccesskeyAttribs( 'summary' );
3089
3090                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3091                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3092                         'id' => "wpSummaryLabel"
3093                 ];
3094
3095                 $label = null;
3096                 if ( $labelText ) {
3097                         $label = Xml::tags(
3098                                 'label',
3099                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3100                                 $labelText
3101                         );
3102                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3103                 }
3104
3105                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3106
3107                 return [ $label, $input ];
3108         }
3109
3110         /**
3111          * Builds a standard summary input with a label.
3112          *
3113          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3114          * @param string $summary The value of the summary input
3115          * @param string $labelText The html to place inside the label
3116          * @param array $inputAttrs Array of attrs to use on the input
3117          *
3118          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3119          */
3120         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3121                 wfDeprecated( __METHOD__, '1.30' );
3122                 $this->getSummaryInputWidget( $summary, $labelText, $inputAttrs );
3123         }
3124
3125         /**
3126          * Builds a standard summary input with a label.
3127          *
3128          * @param string $summary The value of the summary input
3129          * @param string $labelText The html to place inside the label
3130          * @param array $inputAttrs Array of attrs to use on the input
3131          *
3132          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3133          */
3134         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3135                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3136                         $this->getSummaryInputAttributes( $inputAttrs )
3137                 );
3138                 $inputAttrs += [
3139                         'title' => Linker::titleAttrib( 'summary' ),
3140                         'accessKey' => Linker::accesskey( 'summary' ),
3141                 ];
3142
3143                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3144                 $inputAttrs['inputId'] = $inputAttrs['id'];
3145                 $inputAttrs['id'] = 'wpSummaryWidget';
3146
3147                 return new OOUI\FieldLayout(
3148                         new OOUI\TextInputWidget( [
3149                                 'value' => $summary,
3150                                 'infusable' => true,
3151                         ] + $inputAttrs ),
3152                         [
3153                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3154                                 'align' => 'top',
3155                                 'id' => 'wpSummaryLabel',
3156                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3157                         ]
3158                 );
3159         }
3160
3161         /**
3162          * @param bool $isSubjectPreview True if this is the section subject/title
3163          *   up top, or false if this is the comment summary
3164          *   down below the textarea
3165          * @param string $summary The text of the summary to display
3166          */
3167         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3168                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3169                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3170                 if ( $isSubjectPreview ) {
3171                         if ( $this->nosummary ) {
3172                                 return;
3173                         }
3174                 } else {
3175                         if ( !$this->mShowSummaryField ) {
3176                                 return;
3177                         }
3178                 }
3179
3180                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3181                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3182                                 $summary,
3183                                 $labelText,
3184                                 [ 'class' => $summaryClass ]
3185                         ) );
3186         }
3187
3188         /**
3189          * @param bool $isSubjectPreview True if this is the section subject/title
3190          *   up top, or false if this is the comment summary
3191          *   down below the textarea
3192          * @param string $summary The text of the summary to display
3193          * @return string
3194          */
3195         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3196                 // avoid spaces in preview, gets always trimmed on save
3197                 $summary = trim( $summary );
3198                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3199                         return "";
3200                 }
3201
3202                 global $wgParser;
3203
3204                 if ( $isSubjectPreview ) {
3205                         $summary = $this->context->msg( 'newsectionsummary' )
3206                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3207                                 ->inContentLanguage()->text();
3208                 }
3209
3210                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3211
3212                 $summary = $this->context->msg( $message )->parse()
3213                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3214                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3215         }
3216
3217         protected function showFormBeforeText() {
3218                 $out = $this->context->getOutput();
3219                 $out->addHTML( Html::hidden( 'wpSection', htmlspecialchars( $this->section ) ) );
3220                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3221                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3222                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3223                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3224
3225                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3226                         $out->addHTML( Html::hidden( 'safemode', '1' ) );
3227                 }
3228         }
3229
3230         protected function showFormAfterText() {
3231                 /**
3232                  * To make it harder for someone to slip a user a page
3233                  * which submits an edit form to the wiki without their
3234                  * knowledge, a random token is associated with the login
3235                  * session. If it's not passed back with the submission,
3236                  * we won't save the page, or render user JavaScript and
3237                  * CSS previews.
3238                  *
3239                  * For anon editors, who may not have a session, we just
3240                  * include the constant suffix to prevent editing from
3241                  * broken text-mangling proxies.
3242                  */
3243                 $this->context->getOutput()->addHTML(
3244                         "\n" .
3245                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3246                         "\n"
3247                 );
3248         }
3249
3250         /**
3251          * Subpage overridable method for printing the form for page content editing
3252          * By default this simply outputs wpTextbox1
3253          * Subclasses can override this to provide a custom UI for editing;
3254          * be it a form, or simply wpTextbox1 with a modified content that will be
3255          * reverse modified when extracted from the post data.
3256          * Note that this is basically the inverse for importContentFormData
3257          */
3258         protected function showContentForm() {
3259                 $this->showTextbox1();
3260         }
3261
3262         /**
3263          * Method to output wpTextbox1
3264          * The $textoverride method can be used by subclasses overriding showContentForm
3265          * to pass back to this method.
3266          *
3267          * @param array $customAttribs Array of html attributes to use in the textarea
3268          * @param string $textoverride Optional text to override $this->textarea1 with
3269          */
3270         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3271                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3272                         $attribs = [ 'style' => 'display:none;' ];
3273                 } else {
3274                         $classes = []; // Textarea CSS
3275                         if ( $this->mTitle->isProtected( 'edit' ) &&
3276                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3277                         ) {
3278                                 # Is the title semi-protected?
3279                                 if ( $this->mTitle->isSemiProtected() ) {
3280                                         $classes[] = 'mw-textarea-sprotected';
3281                                 } else {
3282                                         # Then it must be protected based on static groups (regular)
3283                                         $classes[] = 'mw-textarea-protected';
3284                                 }
3285                                 # Is the title cascade-protected?
3286                                 if ( $this->mTitle->isCascadeProtected() ) {
3287                                         $classes[] = 'mw-textarea-cprotected';
3288                                 }
3289                         }
3290                         # Is an old revision being edited?
3291                         if ( $this->isOldRev ) {
3292                                 $classes[] = 'mw-textarea-oldrev';
3293                         }
3294
3295                         $attribs = [ 'tabindex' => 1 ];
3296
3297                         if ( is_array( $customAttribs ) ) {
3298                                 $attribs += $customAttribs;
3299                         }
3300
3301                         if ( count( $classes ) ) {
3302                                 if ( isset( $attribs['class'] ) ) {
3303                                         $classes[] = $attribs['class'];
3304                                 }
3305                                 $attribs['class'] = implode( ' ', $classes );
3306                         }
3307                 }
3308
3309                 $this->showTextbox(
3310                         $textoverride !== null ? $textoverride : $this->textbox1,
3311                         'wpTextbox1',
3312                         $attribs
3313                 );
3314         }
3315
3316         protected function showTextbox2() {
3317                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3318         }
3319
3320         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3321                 $wikitext = $this->safeUnicodeOutput( $text );
3322                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3323
3324                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $this->context->getUser() );
3325
3326                 $this->context->getOutput()->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3327         }
3328
3329         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3330                 $classes = [];
3331                 if ( $isOnTop ) {
3332                         $classes[] = 'ontop';
3333                 }
3334
3335                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3336
3337                 if ( $this->formtype != 'preview' ) {
3338                         $attribs['style'] = 'display: none;';
3339                 }
3340
3341                 $out = $this->context->getOutput();
3342                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3343
3344                 if ( $this->formtype == 'preview' ) {
3345                         $this->showPreview( $previewOutput );
3346                 } else {
3347                         // Empty content container for LivePreview
3348                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3349                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3350                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3351                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3352                 }
3353
3354                 $out->addHTML( '</div>' );
3355
3356                 if ( $this->formtype == 'diff' ) {
3357                         try {
3358                                 $this->showDiff();
3359                         } catch ( MWContentSerializationException $ex ) {
3360                                 $msg = $this->context->msg(
3361                                         'content-failed-to-parse',
3362                                         $this->contentModel,
3363                                         $this->contentFormat,
3364                                         $ex->getMessage()
3365                                 );
3366                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3367                         }
3368                 }
3369         }
3370
3371         /**
3372          * Append preview output to OutputPage.
3373          * Includes category rendering if this is a category page.
3374          *
3375          * @param string $text The HTML to be output for the preview.
3376          */
3377         protected function showPreview( $text ) {
3378                 if ( $this->mArticle instanceof CategoryPage ) {
3379                         $this->mArticle->openShowCategory();
3380                 }
3381                 # This hook seems slightly odd here, but makes things more
3382                 # consistent for extensions.
3383                 $out = $this->context->getOutput();
3384                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3385                 $out->addHTML( $text );
3386                 if ( $this->mArticle instanceof CategoryPage ) {
3387                         $this->mArticle->closeShowCategory();
3388                 }
3389         }
3390
3391         /**
3392          * Get a diff between the current contents of the edit box and the
3393          * version of the page we're editing from.
3394          *
3395          * If this is a section edit, we'll replace the section as for final
3396          * save and then make a comparison.
3397          */
3398         public function showDiff() {
3399                 global $wgContLang;
3400
3401                 $oldtitlemsg = 'currentrev';
3402                 # if message does not exist, show diff against the preloaded default
3403                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3404                         $oldtext = $this->mTitle->getDefaultMessageText();
3405                         if ( $oldtext !== false ) {
3406                                 $oldtitlemsg = 'defaultmessagetext';
3407                                 $oldContent = $this->toEditContent( $oldtext );
3408                         } else {
3409                                 $oldContent = null;
3410                         }
3411                 } else {
3412                         $oldContent = $this->getCurrentContent();
3413                 }
3414
3415                 $textboxContent = $this->toEditContent( $this->textbox1 );
3416                 if ( $this->editRevId !== null ) {
3417                         $newContent = $this->page->replaceSectionAtRev(
3418                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3419                         );
3420                 } else {
3421                         $newContent = $this->page->replaceSectionContent(
3422                                 $this->section, $textboxContent, $this->summary, $this->edittime
3423                         );
3424                 }
3425
3426                 if ( $newContent ) {
3427                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3428
3429                         $user = $this->context->getUser();
3430                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
3431                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3432                 }
3433
3434                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3435                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3436                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3437
3438                         if ( !$oldContent ) {
3439                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3440                         }
3441
3442                         if ( !$newContent ) {
3443                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3444                         }
3445
3446                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3447                         $de->setContent( $oldContent, $newContent );
3448
3449                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3450                         $de->showDiffStyle();
3451                 } else {
3452                         $difftext = '';
3453                 }
3454
3455                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3456         }
3457
3458         /**
3459          * Show the header copyright warning.
3460          */
3461         protected function showHeaderCopyrightWarning() {
3462                 $msg = 'editpage-head-copy-warn';
3463                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3464                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3465                                 'editpage-head-copy-warn' );
3466                 }
3467         }
3468
3469         /**
3470          * Give a chance for site and per-namespace customizations of
3471          * terms of service summary link that might exist separately
3472          * from the copyright notice.
3473          *
3474          * This will display between the save button and the edit tools,
3475          * so should remain short!
3476          */
3477         protected function showTosSummary() {
3478                 $msg = 'editpage-tos-summary';
3479                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3480                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3481                         $out = $this->context->getOutput();
3482                         $out->addHTML( '<div class="mw-tos-summary">' );
3483                         $out->addWikiMsg( $msg );
3484                         $out->addHTML( '</div>' );
3485                 }
3486         }
3487
3488         /**
3489          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3490          * characters not present on most keyboards for copying/pasting.
3491          */
3492         protected function showEditTools() {
3493                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3494                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3495                         '</div>' );
3496         }
3497
3498         /**
3499          * Get the copyright warning
3500          *
3501          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3502          * @return string
3503          */
3504         protected function getCopywarn() {
3505                 return self::getCopyrightWarning( $this->mTitle );
3506         }
3507
3508         /**
3509          * Get the copyright warning, by default returns wikitext
3510          *
3511          * @param Title $title
3512          * @param string $format Output format, valid values are any function of a Message object
3513          * @param Language|string|null $langcode Language code or Language object.
3514          * @return string
3515          */
3516         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3517                 global $wgRightsText;
3518                 if ( $wgRightsText ) {
3519                         $copywarnMsg = [ 'copyrightwarning',
3520                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3521                                 $wgRightsText ];
3522                 } else {
3523                         $copywarnMsg = [ 'copyrightwarning2',
3524                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3525                 }
3526                 // Allow for site and per-namespace customization of contribution/copyright notice.
3527                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3528
3529                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3530                 if ( $langcode ) {
3531                         $msg->inLanguage( $langcode );
3532                 }
3533                 return "<div id=\"editpage-copywarn\">\n" .
3534                         $msg->$format() . "\n</div>";
3535         }
3536
3537         /**
3538          * Get the Limit report for page previews
3539          *
3540          * @since 1.22
3541          * @param ParserOutput $output ParserOutput object from the parse
3542          * @return string HTML
3543          */
3544         public static function getPreviewLimitReport( $output ) {
3545                 if ( !$output || !$output->getLimitReportData() ) {
3546                         return '';
3547                 }
3548
3549                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3550                         wfMessage( 'limitreport-title' )->parseAsBlock()
3551                 );
3552
3553                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3554                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3555
3556                 $limitReport .= Html::openElement( 'table', [
3557                         'class' => 'preview-limit-report wikitable'
3558                 ] ) .
3559                         Html::openElement( 'tbody' );
3560
3561                 foreach ( $output->getLimitReportData() as $key => $value ) {
3562                         if ( Hooks::run( 'ParserLimitReportFormat',
3563                                 [ $key, &$value, &$limitReport, true, true ]
3564                         ) ) {
3565                                 $keyMsg = wfMessage( $key );
3566                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3567                                 if ( !$valueMsg->exists() ) {
3568                                         $valueMsg = new RawMessage( '$1' );
3569                                 }
3570                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3571                                         $limitReport .= Html::openElement( 'tr' ) .
3572                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3573                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3574                                                 Html::closeElement( 'tr' );
3575                                 }
3576                         }
3577                 }
3578
3579                 $limitReport .= Html::closeElement( 'tbody' ) .
3580                         Html::closeElement( 'table' ) .
3581                         Html::closeElement( 'div' );
3582
3583                 return $limitReport;
3584         }
3585
3586         protected function showStandardInputs( &$tabindex = 2 ) {
3587                 $out = $this->context->getOutput();
3588                 $out->addHTML( "<div class='editOptions'>\n" );
3589
3590                 if ( $this->section != 'new' ) {
3591                         $this->showSummaryInput( false, $this->summary );
3592                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3593                 }
3594
3595                 $checkboxes = $this->getCheckboxesWidget(
3596                         $tabindex,
3597                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3598                 );
3599                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3600
3601                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3602
3603                 // Show copyright warning.
3604                 $out->addWikiText( $this->getCopywarn() );
3605                 $out->addHTML( $this->editFormTextAfterWarn );
3606
3607                 $out->addHTML( "<div class='editButtons'>\n" );
3608                 $out->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3609
3610                 $cancel = $this->getCancelLink();
3611                 if ( $cancel !== '' ) {
3612                         $cancel .= Html::element( 'span',
3613                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3614                                 $this->context->msg( 'pipe-separator' )->text() );
3615                 }
3616
3617                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3618                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3619                 $edithelp =
3620                         Html::linkButton(
3621                                 $this->context->msg( 'edithelp' )->text(),
3622                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3623                                 [ 'mw-ui-quiet' ]
3624                         ) .
3625                         $this->context->msg( 'word-separator' )->escaped() .
3626                         $this->context->msg( 'newwindow' )->parse();
3627
3628                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3629                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3630                 $out->addHTML( "</div><!-- editButtons -->\n" );
3631
3632                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3633
3634                 $out->addHTML( "</div><!-- editOptions -->\n" );
3635         }
3636
3637         /**
3638          * Show an edit conflict. textbox1 is already shown in showEditForm().
3639          * If you want to use another entry point to this function, be careful.
3640          */
3641         protected function showConflict() {
3642                 $out = $this->context->getOutput();
3643                 // Avoid PHP 7.1 warning of passing $this by reference
3644                 $editPage = $this;
3645                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3646                         $this->incrementConflictStats();
3647
3648                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3649
3650                         $content1 = $this->toEditContent( $this->textbox1 );
3651                         $content2 = $this->toEditContent( $this->textbox2 );
3652
3653                         $handler = ContentHandler::getForModelID( $this->contentModel );
3654                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3655                         $de->setContent( $content2, $content1 );
3656                         $de->showDiff(
3657                                 $this->context->msg( 'yourtext' )->parse(),
3658                                 $this->context->msg( 'storedversion' )->text()
3659                         );
3660
3661                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3662                         $this->showTextbox2();
3663                 }
3664         }
3665
3666         protected function incrementConflictStats() {
3667                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3668                 $stats->increment( 'edit.failures.conflict' );
3669                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3670                 if (
3671                         $this->mTitle->getNamespace() >= NS_MAIN &&
3672                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3673                 ) {
3674                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3675                 }
3676         }
3677
3678         /**
3679          * @return string
3680          */
3681         public function getCancelLink() {
3682                 $cancelParams = [];
3683                 if ( !$this->isConflict && $this->oldid > 0 ) {
3684                         $cancelParams['oldid'] = $this->oldid;
3685                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3686                         $cancelParams['redirect'] = 'no';
3687                 }
3688
3689                 return new OOUI\ButtonWidget( [
3690                         'id' => 'mw-editform-cancel',
3691                         'href' => $this->getContextTitle()->getLinkUrl( $cancelParams ),
3692                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3693                         'framed' => false,
3694                         'infusable' => true,
3695                         'flags' => 'destructive',
3696                 ] );
3697         }
3698
3699         /**
3700          * Returns the URL to use in the form's action attribute.
3701          * This is used by EditPage subclasses when simply customizing the action
3702          * variable in the constructor is not enough. This can be used when the
3703          * EditPage lives inside of a Special page rather than a custom page action.
3704          *
3705          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3706          * @return string
3707          */
3708         protected function getActionURL( Title $title ) {
3709                 return $title->getLocalURL( [ 'action' => $this->action ] );
3710         }
3711
3712         /**
3713          * Check if a page was deleted while the user was editing it, before submit.
3714          * Note that we rely on the logging table, which hasn't been always there,
3715          * but that doesn't matter, because this only applies to brand new
3716          * deletes.
3717          * @return bool
3718          */
3719         protected function wasDeletedSinceLastEdit() {
3720                 if ( $this->deletedSinceEdit !== null ) {
3721                         return $this->deletedSinceEdit;
3722                 }
3723
3724                 $this->deletedSinceEdit = false;
3725
3726                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3727                         $this->lastDelete = $this->getLastDelete();
3728                         if ( $this->lastDelete ) {
3729                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3730                                 if ( $deleteTime > $this->starttime ) {
3731                                         $this->deletedSinceEdit = true;
3732                                 }
3733                         }
3734                 }
3735
3736                 return $this->deletedSinceEdit;
3737         }
3738
3739         /**
3740          * @return bool|stdClass
3741          */
3742         protected function getLastDelete() {
3743                 $dbr = wfGetDB( DB_REPLICA );
3744                 $commentQuery = CommentStore::newKey( 'log_comment' )->getJoin();
3745                 $data = $dbr->selectRow(
3746                         [ 'logging', 'user' ] + $commentQuery['tables'],
3747                         [
3748                                 'log_type',
3749                                 'log_action',
3750                                 'log_timestamp',
3751                                 'log_user',
3752                                 'log_namespace',
3753                                 'log_title',
3754                                 'log_params',
3755                                 'log_deleted',
3756                                 'user_name'
3757                         ] + $commentQuery['fields'], [
3758                                 'log_namespace' => $this->mTitle->getNamespace(),
3759                                 'log_title' => $this->mTitle->getDBkey(),
3760                                 'log_type' => 'delete',
3761                                 'log_action' => 'delete',
3762                                 'user_id=log_user'
3763                         ],
3764                         __METHOD__,
3765                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3766                         [
3767                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3768                         ] + $commentQuery['joins']
3769                 );
3770                 // Quick paranoid permission checks...
3771                 if ( is_object( $data ) ) {
3772                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3773                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3774                         }
3775
3776                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3777                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3778                                 $data->log_comment_data = null;
3779                         }
3780                 }
3781
3782                 return $data;
3783         }
3784
3785         /**
3786          * Get the rendered text for previewing.
3787          * @throws MWException
3788          * @return string
3789          */
3790         public function getPreviewText() {
3791                 global $wgRawHtml;
3792                 global $wgAllowUserCss, $wgAllowUserJs;
3793
3794                 $out = $this->context->getOutput();
3795
3796                 if ( $wgRawHtml && !$this->mTokenOk ) {
3797                         // Could be an offsite preview attempt. This is very unsafe if
3798                         // HTML is enabled, as it could be an attack.
3799                         $parsedNote = '';
3800                         if ( $this->textbox1 !== '' ) {
3801                                 // Do not put big scary notice, if previewing the empty
3802                                 // string, which happens when you initially edit
3803                                 // a category page, due to automatic preview-on-open.
3804                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3805                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3806                                         true, /* interface */true );
3807                         }
3808                         $this->incrementEditFailureStats( 'session_loss' );
3809                         return $parsedNote;
3810                 }
3811
3812                 $note = '';
3813
3814                 try {
3815                         $content = $this->toEditContent( $this->textbox1 );
3816
3817                         $previewHTML = '';
3818                         if ( !Hooks::run(
3819                                 'AlternateEditPreview',
3820                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3821                         ) {
3822                                 return $previewHTML;
3823                         }
3824
3825                         # provide a anchor link to the editform
3826                         $continueEditing = '<span class="mw-continue-editing">' .
3827                                 '[[#' . self::EDITFORM_ID . '|' .
3828                                 $this->context->getLanguage()->getArrow() . ' ' .
3829                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3830                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3831                                 if ( $this->mTokenOkExceptSuffix ) {
3832                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3833                                         $this->incrementEditFailureStats( 'bad_token' );
3834                                 } else {
3835                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3836                                         $this->incrementEditFailureStats( 'session_loss' );
3837                                 }
3838                         } elseif ( $this->incompleteForm ) {
3839                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3840                                 if ( $this->mTriedSave ) {
3841                                         $this->incrementEditFailureStats( 'incomplete_form' );
3842                                 }
3843                         } else {
3844                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3845                         }
3846
3847                         # don't parse non-wikitext pages, show message about preview
3848                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3849                                 if ( $this->mTitle->isCssJsSubpage() ) {
3850                                         $level = 'user';
3851                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3852                                         $level = 'site';
3853                                 } else {
3854                                         $level = false;
3855                                 }
3856
3857                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3858                                         $format = 'css';
3859                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3860                                                 $format = false;
3861                                         }
3862                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3863                                         $format = 'js';
3864                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3865                                                 $format = false;
3866                                         }
3867                                 } else {
3868                                         $format = false;
3869                                 }
3870
3871                                 # Used messages to make sure grep find them:
3872                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3873                                 if ( $level && $format ) {
3874                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3875                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3876                                                 ' ' . $continueEditing . "</div>";
3877                                 }
3878                         }
3879
3880                         # If we're adding a comment, we need to show the
3881                         # summary as the headline
3882                         if ( $this->section === "new" && $this->summary !== "" ) {
3883                                 $content = $content->addSectionHeader( $this->summary );
3884                         }
3885
3886                         $hook_args = [ $this, &$content ];
3887                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3888
3889                         $parserResult = $this->doPreviewParse( $content );
3890                         $parserOutput = $parserResult['parserOutput'];
3891                         $previewHTML = $parserResult['html'];
3892                         $this->mParserOutput = $parserOutput;
3893                         $out->addParserOutputMetadata( $parserOutput );
3894
3895                         if ( count( $parserOutput->getWarnings() ) ) {
3896                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3897                         }
3898
3899                 } catch ( MWContentSerializationException $ex ) {
3900                         $m = $this->context->msg(
3901                                 'content-failed-to-parse',
3902                                 $this->contentModel,
3903                                 $this->contentFormat,
3904                                 $ex->getMessage()
3905                         );
3906                         $note .= "\n\n" . $m->parse();
3907                         $previewHTML = '';
3908                 }
3909
3910                 if ( $this->isConflict ) {
3911                         $conflict = '<h2 id="mw-previewconflict">'
3912                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3913                 } else {
3914                         $conflict = '<hr />';
3915                 }
3916
3917                 $previewhead = "<div class='previewnote'>\n" .
3918                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3919                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3920
3921                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3922                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3923                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3924                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3925
3926                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3927         }
3928
3929         private function incrementEditFailureStats( $failureType ) {
3930                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3931                 $stats->increment( 'edit.failures.' . $failureType );
3932         }
3933
3934         /**
3935          * Get parser options for a preview
3936          * @return ParserOptions
3937          */
3938         protected function getPreviewParserOptions() {
3939                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3940                 $parserOptions->setIsPreview( true );
3941                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3942                 $parserOptions->enableLimitReport();
3943                 return $parserOptions;
3944         }
3945
3946         /**
3947          * Parse the page for a preview. Subclasses may override this class, in order
3948          * to parse with different options, or to otherwise modify the preview HTML.
3949          *
3950          * @param Content $content The page content
3951          * @return array with keys:
3952          *   - parserOutput: The ParserOutput object
3953          *   - html: The HTML to be displayed
3954          */
3955         protected function doPreviewParse( Content $content ) {
3956                 $user = $this->context->getUser();
3957                 $parserOptions = $this->getPreviewParserOptions();
3958                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
3959                 $scopedCallback = $parserOptions->setupFakeRevision(
3960                         $this->mTitle, $pstContent, $user );
3961                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3962                 ScopedCallback::consume( $scopedCallback );
3963                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3964                 return [
3965                         'parserOutput' => $parserOutput,
3966                         'html' => $parserOutput->getText() ];
3967         }
3968
3969         /**
3970          * @return array
3971          */
3972         public function getTemplates() {
3973                 if ( $this->preview || $this->section != '' ) {
3974                         $templates = [];
3975                         if ( !isset( $this->mParserOutput ) ) {
3976                                 return $templates;
3977                         }
3978                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3979                                 foreach ( array_keys( $template ) as $dbk ) {
3980                                         $templates[] = Title::makeTitle( $ns, $dbk );
3981                                 }
3982                         }
3983                         return $templates;
3984                 } else {
3985                         return $this->mTitle->getTemplateLinksFrom();
3986                 }
3987         }
3988
3989         /**
3990          * Shows a bulletin board style toolbar for common editing functions.
3991          * It can be disabled in the user preferences.
3992          *
3993          * @param Title $title Title object for the page being edited (optional)
3994          * @return string
3995          */
3996         public static function getEditToolbar( $title = null ) {
3997                 global $wgContLang, $wgOut;
3998                 global $wgEnableUploads, $wgForeignFileRepos;
3999
4000                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4001                 $showSignature = true;
4002                 if ( $title ) {
4003                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4004                 }
4005
4006                 /**
4007                  * $toolarray is an array of arrays each of which includes the
4008                  * opening tag, the closing tag, optionally a sample text that is
4009                  * inserted between the two when no selection is highlighted
4010                  * and.  The tip text is shown when the user moves the mouse
4011                  * over the button.
4012                  *
4013                  * Images are defined in ResourceLoaderEditToolbarModule.
4014                  */
4015                 $toolarray = [
4016                         [
4017                                 'id'     => 'mw-editbutton-bold',
4018                                 'open'   => '\'\'\'',
4019                                 'close'  => '\'\'\'',
4020                                 'sample' => wfMessage( 'bold_sample' )->text(),
4021                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4022                         ],
4023                         [
4024                                 'id'     => 'mw-editbutton-italic',
4025                                 'open'   => '\'\'',
4026                                 'close'  => '\'\'',
4027                                 'sample' => wfMessage( 'italic_sample' )->text(),
4028                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4029                         ],
4030                         [
4031                                 'id'     => 'mw-editbutton-link',
4032                                 'open'   => '[[',
4033                                 'close'  => ']]',
4034                                 'sample' => wfMessage( 'link_sample' )->text(),
4035                                 'tip'    => wfMessage( 'link_tip' )->text(),
4036                         ],
4037                         [
4038                                 'id'     => 'mw-editbutton-extlink',
4039                                 'open'   => '[',
4040                                 'close'  => ']',
4041                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4042                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4043                         ],
4044                         [
4045                                 'id'     => 'mw-editbutton-headline',
4046                                 'open'   => "\n== ",
4047                                 'close'  => " ==\n",
4048                                 'sample' => wfMessage( 'headline_sample' )->text(),
4049                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4050                         ],
4051                         $imagesAvailable ? [
4052                                 'id'     => 'mw-editbutton-image',
4053                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4054                                 'close'  => ']]',
4055                                 'sample' => wfMessage( 'image_sample' )->text(),
4056                                 'tip'    => wfMessage( 'image_tip' )->text(),
4057                         ] : false,
4058                         $imagesAvailable ? [
4059                                 'id'     => 'mw-editbutton-media',
4060                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4061                                 'close'  => ']]',
4062                                 'sample' => wfMessage( 'media_sample' )->text(),
4063                                 'tip'    => wfMessage( 'media_tip' )->text(),
4064                         ] : false,
4065                         [
4066                                 'id'     => 'mw-editbutton-nowiki',
4067                                 'open'   => "<nowiki>",
4068                                 'close'  => "</nowiki>",
4069                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4070                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4071                         ],
4072                         $showSignature ? [
4073                                 'id'     => 'mw-editbutton-signature',
4074                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4075                                 'close'  => '',
4076                                 'sample' => '',
4077                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4078                         ] : false,
4079                         [
4080                                 'id'     => 'mw-editbutton-hr',
4081                                 'open'   => "\n----\n",
4082                                 'close'  => '',
4083                                 'sample' => '',
4084                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4085                         ]
4086                 ];
4087
4088                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4089                 foreach ( $toolarray as $tool ) {
4090                         if ( !$tool ) {
4091                                 continue;
4092                         }
4093
4094                         $params = [
4095                                 // Images are defined in ResourceLoaderEditToolbarModule
4096                                 false,
4097                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4098                                 // Older browsers show a "speedtip" type message only for ALT.
4099                                 // Ideally these should be different, realistically they
4100                                 // probably don't need to be.
4101                                 $tool['tip'],
4102                                 $tool['open'],
4103                                 $tool['close'],
4104                                 $tool['sample'],
4105                                 $tool['id'],
4106                         ];
4107
4108                         $script .= Xml::encodeJsCall(
4109                                 'mw.toolbar.addButton',
4110                                 $params,
4111                                 ResourceLoader::inDebugMode()
4112                         );
4113                 }
4114
4115                 $script .= '});';
4116
4117                 $toolbar = '<div id="toolbar"></div>';
4118
4119                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4120                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4121                         // been over-written by a hook caller
4122                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4123                 };
4124
4125                 return $toolbar;
4126         }
4127
4128         /**
4129          * Return an array of checkbox definitions.
4130          *
4131          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4132          *
4133          * Array values are associative arrays with the following keys:
4134          *  - 'label-message' (required): message for label text
4135          *  - 'id' (required): 'id' attribute for the `<input>`
4136          *  - 'default' (required): default checkedness (true or false)
4137          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4138          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4139          *    from messages like 'tooltip-foo', 'accesskey-foo'
4140          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4141          *  - 'legacy-name' (optional): short name for backwards-compatibility
4142          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4143          *   where bool indicates the checked status of the checkbox
4144          * @return array
4145          */
4146         public function getCheckboxesDefinition( $checked ) {
4147                 $checkboxes = [];
4148
4149                 $user = $this->context->getUser();
4150                 // don't show the minor edit checkbox if it's a new page or section
4151                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4152                         $checkboxes['wpMinoredit'] = [
4153                                 'id' => 'wpMinoredit',
4154                                 'label-message' => 'minoredit',
4155                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4156                                 'tooltip' => 'minoredit',
4157                                 'label-id' => 'mw-editpage-minoredit',
4158                                 'legacy-name' => 'minor',
4159                                 'default' => $checked['minor'],
4160                         ];
4161                 }
4162
4163                 if ( $user->isLoggedIn() ) {
4164                         $checkboxes['wpWatchthis'] = [
4165                                 'id' => 'wpWatchthis',
4166                                 'label-message' => 'watchthis',
4167                                 // Uses messages: tooltip-watch, accesskey-watch
4168                                 'tooltip' => 'watch',
4169                                 'label-id' => 'mw-editpage-watch',
4170                                 'legacy-name' => 'watch',
4171                                 'default' => $checked['watch'],
4172                         ];
4173                 }
4174
4175                 $editPage = $this;
4176                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4177
4178                 return $checkboxes;
4179         }
4180
4181         /**
4182          * Returns an array of html code of the following checkboxes old style:
4183          * minor and watch
4184          *
4185          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4186          * @param int &$tabindex Current tabindex
4187          * @param array $checked See getCheckboxesDefinition()
4188          * @return array
4189          */
4190         public function getCheckboxes( &$tabindex, $checked ) {
4191                 $checkboxes = [];
4192                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4193
4194                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4195                 if ( !$this->isNew ) {
4196                         $checkboxes['minor'] = '';
4197                 }
4198                 $checkboxes['watch'] = '';
4199
4200                 foreach ( $checkboxesDef as $name => $options ) {
4201                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4202                         $label = $this->context->msg( $options['label-message'] )->parse();
4203                         $attribs = [
4204                                 'tabindex' => ++$tabindex,
4205                                 'id' => $options['id'],
4206                         ];
4207                         $labelAttribs = [
4208                                 'for' => $options['id'],
4209                         ];
4210                         if ( isset( $options['tooltip'] ) ) {
4211                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4212                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4213                         }
4214                         if ( isset( $options['title-message'] ) ) {
4215                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4216                         }
4217                         if ( isset( $options['label-id'] ) ) {
4218                                 $labelAttribs['id'] = $options['label-id'];
4219                         }
4220                         $checkboxHtml =
4221                                 Xml::check( $name, $options['default'], $attribs ) .
4222                                 '&#160;' .
4223                                 Xml::tags( 'label', $labelAttribs, $label );
4224
4225                         $checkboxes[ $legacyName ] = $checkboxHtml;
4226                 }
4227
4228                 // Avoid PHP 7.1 warning of passing $this by reference
4229                 $editPage = $this;
4230                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4231                 return $checkboxes;
4232         }
4233
4234         /**
4235          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4236          * any other added by extensions.
4237          *
4238          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4239          * @param int &$tabindex Current tabindex
4240          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4241          *                 status of the checkbox
4242          *
4243          * @return array Associative array of string keys to OOUI\FieldLayout instances
4244          */
4245         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4246                 return $this->getCheckboxesWidget( $tabindex, $checked );
4247         }
4248
4249         /**
4250          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4251          * any other added by extensions.
4252          *
4253          * @param int &$tabindex Current tabindex
4254          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4255          *                 status of the checkbox
4256          *
4257          * @return array Associative array of string keys to OOUI\FieldLayout instances
4258          */
4259         public function getCheckboxesWidget( &$tabindex, $checked ) {
4260                 $checkboxes = [];
4261                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4262
4263                 foreach ( $checkboxesDef as $name => $options ) {
4264                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4265
4266                         $title = null;
4267                         $accesskey = null;
4268                         if ( isset( $options['tooltip'] ) ) {
4269                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4270                                 $title = Linker::titleAttrib( $options['tooltip'] );
4271                         }
4272                         if ( isset( $options['title-message'] ) ) {
4273                                 $title = $this->context->msg( $options['title-message'] )->text();
4274                         }
4275
4276                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4277                                 new OOUI\CheckboxInputWidget( [
4278                                         'tabIndex' => ++$tabindex,
4279                                         'accessKey' => $accesskey,
4280                                         'id' => $options['id'] . 'Widget',
4281                                         'inputId' => $options['id'],
4282                                         'name' => $name,
4283                                         'selected' => $options['default'],
4284                                         'infusable' => true,
4285                                 ] ),
4286                                 [
4287                                         'align' => 'inline',
4288                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4289                                         'title' => $title,
4290                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4291                                 ]
4292                         );
4293                 }
4294
4295                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4296                 // people have used it for the weirdest things completely unrelated to checkboxes...
4297                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4298                 $legacyCheckboxes = [];
4299                 if ( !$this->isNew ) {
4300                         $legacyCheckboxes['minor'] = '';
4301                 }
4302                 $legacyCheckboxes['watch'] = '';
4303                 // Copy new-style checkboxes into an old-style structure
4304                 foreach ( $checkboxes as $name => $oouiLayout ) {
4305                         $legacyCheckboxes[$name] = (string)$oouiLayout;
4306                 }
4307                 // Avoid PHP 7.1 warning of passing $this by reference
4308                 $ep = $this;
4309                 Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
4310                 // Copy back any additional old-style checkboxes into the new-style structure
4311                 foreach ( $legacyCheckboxes as $name => $html ) {
4312                         if ( $html && !isset( $checkboxes[$name] ) ) {
4313                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4314                         }
4315                 }
4316
4317                 return $checkboxes;
4318         }
4319
4320         /**
4321          * Get the message key of the label for the button to save the page
4322          *
4323          * @return string
4324          */
4325         protected function getSubmitButtonLabel() {
4326                 $labelAsPublish =
4327                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4328
4329                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4330                 $newPage = !$this->mTitle->exists();
4331
4332                 if ( $labelAsPublish ) {
4333                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4334                 } else {
4335                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4336                 }
4337
4338                 return $buttonLabelKey;
4339         }
4340
4341         /**
4342          * Returns an array of html code of the following buttons:
4343          * save, diff and preview
4344          *
4345          * @param int &$tabindex Current tabindex
4346          *
4347          * @return array
4348          */
4349         public function getEditButtons( &$tabindex ) {
4350                 $buttons = [];
4351
4352                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4353
4354                 $attribs = [
4355                         'name' => 'wpSave',
4356                         'tabindex' => ++$tabindex,
4357                 ];
4358
4359                 $saveConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4360                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4361                         'id' => 'wpSaveWidget',
4362                         'inputId' => 'wpSave',
4363                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4364                         'useInputTag' => true,
4365                         'flags' => [ 'constructive', 'primary' ],
4366                         'label' => $buttonLabel,
4367                         'infusable' => true,
4368                         'type' => 'submit',
4369                         'title' => Linker::titleAttrib( 'save' ),
4370                         'accessKey' => Linker::accesskey( 'save' ),
4371                 ] + $saveConfig );
4372
4373                 $attribs = [
4374                         'name' => 'wpPreview',
4375                         'tabindex' => ++$tabindex,
4376                 ];
4377
4378                 $previewConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4379                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4380                         'id' => 'wpPreviewWidget',
4381                         'inputId' => 'wpPreview',
4382                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4383                         'useInputTag' => true,
4384                         'label' => $this->context->msg( 'showpreview' )->text(),
4385                         'infusable' => true,
4386                         'type' => 'submit',
4387                         'title' => Linker::titleAttrib( 'preview' ),
4388                         'accessKey' => Linker::accesskey( 'preview' ),
4389                 ] + $previewConfig );
4390
4391                 $attribs = [
4392                         'name' => 'wpDiff',
4393                         'tabindex' => ++$tabindex,
4394                 ];
4395
4396                 $diffConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4397                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4398                         'id' => 'wpDiffWidget',
4399                         'inputId' => 'wpDiff',
4400                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4401                         'useInputTag' => true,
4402                         'label' => $this->context->msg( 'showdiff' )->text(),
4403                         'infusable' => true,
4404                         'type' => 'submit',
4405                         'title' => Linker::titleAttrib( 'diff' ),
4406                         'accessKey' => Linker::accesskey( 'diff' ),
4407                 ] + $diffConfig );
4408
4409                 // Avoid PHP 7.1 warning of passing $this by reference
4410                 $editPage = $this;
4411                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4412
4413                 return $buttons;
4414         }
4415
4416         /**
4417          * Creates a basic error page which informs the user that
4418          * they have attempted to edit a nonexistent section.
4419          */
4420         public function noSuchSectionPage() {
4421                 $out = $this->context->getOutput();
4422                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4423
4424                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4425
4426                 // Avoid PHP 7.1 warning of passing $this by reference
4427                 $editPage = $this;
4428                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4429                 $out->addHTML( $res );
4430
4431                 $out->returnToMain( false, $this->mTitle );
4432         }
4433
4434         /**
4435          * Show "your edit contains spam" page with your diff and text
4436          *
4437          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4438          */
4439         public function spamPageWithContent( $match = false ) {
4440                 $this->textbox2 = $this->textbox1;
4441
4442                 if ( is_array( $match ) ) {
4443                         $match = $this->context->getLanguage()->listToText( $match );
4444                 }
4445                 $out = $this->context->getOutput();
4446                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4447
4448                 $out->addHTML( '<div id="spamprotected">' );
4449                 $out->addWikiMsg( 'spamprotectiontext' );
4450                 if ( $match ) {
4451                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4452                 }
4453                 $out->addHTML( '</div>' );
4454
4455                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4456                 $this->showDiff();
4457
4458                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4459                 $this->showTextbox2();
4460
4461                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4462         }
4463
4464         /**
4465          * Check if the browser is on a blacklist of user-agents known to
4466          * mangle UTF-8 data on form submission. Returns true if Unicode
4467          * should make it through, false if it's known to be a problem.
4468          * @return bool
4469          */
4470         private function checkUnicodeCompliantBrowser() {
4471                 global $wgBrowserBlackList;
4472
4473                 $currentbrowser = $this->context->getRequest()->getHeader( 'User-Agent' );
4474                 if ( $currentbrowser === false ) {
4475                         // No User-Agent header sent? Trust it by default...
4476                         return true;
4477                 }
4478
4479                 foreach ( $wgBrowserBlackList as $browser ) {
4480                         if ( preg_match( $browser, $currentbrowser ) ) {
4481                                 return false;
4482                         }
4483                 }
4484                 return true;
4485         }
4486
4487         /**
4488          * Filter an input field through a Unicode de-armoring process if it
4489          * came from an old browser with known broken Unicode editing issues.
4490          *
4491          * @param WebRequest $request
4492          * @param string $field
4493          * @return string
4494          */
4495         protected function safeUnicodeInput( $request, $field ) {
4496                 $text = rtrim( $request->getText( $field ) );
4497                 return $request->getBool( 'safemode' )
4498                         ? $this->unmakeSafe( $text )
4499                         : $text;
4500         }
4501
4502         /**
4503          * Filter an output field through a Unicode armoring process if it is
4504          * going to an old browser with known broken Unicode editing issues.
4505          *
4506          * @param string $text
4507          * @return string
4508          */
4509         protected function safeUnicodeOutput( $text ) {
4510                 return $this->checkUnicodeCompliantBrowser()
4511                         ? $text
4512                         : $this->makeSafe( $text );
4513         }
4514
4515         /**
4516          * A number of web browsers are known to corrupt non-ASCII characters
4517          * in a UTF-8 text editing environment. To protect against this,
4518          * detected browsers will be served an armored version of the text,
4519          * with non-ASCII chars converted to numeric HTML character references.
4520          *
4521          * Preexisting such character references will have a 0 added to them
4522          * to ensure that round-trips do not alter the original data.
4523          *
4524          * @param string $invalue
4525          * @return string
4526          */
4527         private function makeSafe( $invalue ) {
4528                 // Armor existing references for reversibility.
4529                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4530
4531                 $bytesleft = 0;
4532                 $result = "";
4533                 $working = 0;
4534                 $valueLength = strlen( $invalue );
4535                 for ( $i = 0; $i < $valueLength; $i++ ) {
4536                         $bytevalue = ord( $invalue[$i] );
4537                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4538                                 $result .= chr( $bytevalue );
4539                                 $bytesleft = 0;
4540                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4541                                 $working = $working << 6;
4542                                 $working += ( $bytevalue & 0x3F );
4543                                 $bytesleft--;
4544                                 if ( $bytesleft <= 0 ) {
4545                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4546                                 }
4547                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4548                                 $working = $bytevalue & 0x1F;
4549                                 $bytesleft = 1;
4550                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4551                                 $working = $bytevalue & 0x0F;
4552                                 $bytesleft = 2;
4553                         } else { // 1111 0xxx
4554                                 $working = $bytevalue & 0x07;
4555                                 $bytesleft = 3;
4556                         }
4557                 }
4558                 return $result;
4559         }
4560
4561         /**
4562          * Reverse the previously applied transliteration of non-ASCII characters
4563          * back to UTF-8. Used to protect data from corruption by broken web browsers
4564          * as listed in $wgBrowserBlackList.
4565          *
4566          * @param string $invalue
4567          * @return string
4568          */
4569         private function unmakeSafe( $invalue ) {
4570                 $result = "";
4571                 $valueLength = strlen( $invalue );
4572                 for ( $i = 0; $i < $valueLength; $i++ ) {
4573                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4574                                 $i += 3;
4575                                 $hexstring = "";
4576                                 do {
4577                                         $hexstring .= $invalue[$i];
4578                                         $i++;
4579                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4580
4581                                 // Do some sanity checks. These aren't needed for reversibility,
4582                                 // but should help keep the breakage down if the editor
4583                                 // breaks one of the entities whilst editing.
4584                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4585                                         $codepoint = hexdec( $hexstring );
4586                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4587                                 } else {
4588                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4589                                 }
4590                         } else {
4591                                 $result .= substr( $invalue, $i, 1 );
4592                         }
4593                 }
4594                 // reverse the transform that we made for reversibility reasons.
4595                 return strtr( $result, [ "&#x0" => "&#x" ] );
4596         }
4597
4598         /**
4599          * @since 1.29
4600          */
4601         protected function addEditNotices() {
4602                 $out = $this->context->getOutput();
4603                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4604                 if ( count( $editNotices ) ) {
4605                         $out->addHTML( implode( "\n", $editNotices ) );
4606                 } else {
4607                         $msg = $this->context->msg( 'editnotice-notext' );
4608                         if ( !$msg->isDisabled() ) {
4609                                 $out->addHTML(
4610                                         '<div class="mw-editnotice-notext">'
4611                                         . $msg->parseAsBlock()
4612                                         . '</div>'
4613                                 );
4614                         }
4615                 }
4616         }
4617
4618         /**
4619          * @since 1.29
4620          */
4621         protected function addTalkPageText() {
4622                 if ( $this->mTitle->isTalkPage() ) {
4623                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4624                 }
4625         }
4626
4627         /**
4628          * @since 1.29
4629          */
4630         protected function addLongPageWarningHeader() {
4631                 global $wgMaxArticleSize;
4632
4633                 if ( $this->contentLength === false ) {
4634                         $this->contentLength = strlen( $this->textbox1 );
4635                 }
4636
4637                 $out = $this->context->getOutput();
4638                 $lang = $this->context->getLanguage();
4639                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4640                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4641                                 [
4642                                         'longpageerror',
4643                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4644                                         $lang->formatNum( $wgMaxArticleSize )
4645                                 ]
4646                         );
4647                 } else {
4648                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4649                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4650                                         [
4651                                                 'longpage-hint',
4652                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4653                                                 strlen( $this->textbox1 )
4654                                         ]
4655                                 );
4656                         }
4657                 }
4658         }
4659
4660         /**
4661          * @since 1.29
4662          */
4663         protected function addPageProtectionWarningHeaders() {
4664                 $out = $this->context->getOutput();
4665                 if ( $this->mTitle->isProtected( 'edit' ) &&
4666                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4667                 ) {
4668                         # Is the title semi-protected?
4669                         if ( $this->mTitle->isSemiProtected() ) {
4670                                 $noticeMsg = 'semiprotectedpagewarning';
4671                         } else {
4672                                 # Then it must be protected based on static groups (regular)
4673                                 $noticeMsg = 'protectedpagewarning';
4674                         }
4675                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4676                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4677                 }
4678                 if ( $this->mTitle->isCascadeProtected() ) {
4679                         # Is this page under cascading protection from some source pages?
4680                         /** @var Title[] $cascadeSources */
4681                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4682                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4683                         $cascadeSourcesCount = count( $cascadeSources );
4684                         if ( $cascadeSourcesCount > 0 ) {
4685                                 # Explain, and list the titles responsible
4686                                 foreach ( $cascadeSources as $page ) {
4687                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4688                                 }
4689                         }
4690                         $notice .= '</div>';
4691                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4692                 }
4693                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4694                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4695                                 [ 'lim' => 1,
4696                                         'showIfEmpty' => false,
4697                                         'msgKey' => [ 'titleprotectedwarning' ],
4698                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4699                 }
4700         }
4701
4702         /**
4703          * @param OutputPage $out
4704          * @since 1.29
4705          */
4706         protected function addExplainConflictHeader( OutputPage $out ) {
4707                 $out->wrapWikiMsg(
4708                         "<div class='mw-explainconflict'>\n$1\n</div>",
4709                         [ 'explainconflict', $this->context->msg( $this->getSubmitButtonLabel() )->text() ]
4710                 );
4711         }
4712
4713         /**
4714          * @param string $name
4715          * @param mixed[] $customAttribs
4716          * @param User $user
4717          * @return mixed[]
4718          * @since 1.29
4719          */
4720         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4721                 $attribs = $customAttribs + [
4722                                 'accesskey' => ',',
4723                                 'id' => $name,
4724                                 'cols' => 80,
4725                                 'rows' => 25,
4726                                 // Avoid PHP notices when appending preferences
4727                                 // (appending allows customAttribs['style'] to still work).
4728                                 'style' => ''
4729                         ];
4730
4731                 // The following classes can be used here:
4732                 // * mw-editfont-default
4733                 // * mw-editfont-monospace
4734                 // * mw-editfont-sans-serif
4735                 // * mw-editfont-serif
4736                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4737
4738                 if ( isset( $attribs['class'] ) ) {
4739                         if ( is_string( $attribs['class'] ) ) {
4740                                 $attribs['class'] .= ' ' . $class;
4741                         } elseif ( is_array( $attribs['class'] ) ) {
4742                                 $attribs['class'][] = $class;
4743                         }
4744                 } else {
4745                         $attribs['class'] = $class;
4746                 }
4747
4748                 $pageLang = $this->mTitle->getPageLanguage();
4749                 $attribs['lang'] = $pageLang->getHtmlCode();
4750                 $attribs['dir'] = $pageLang->getDir();
4751
4752                 return $attribs;
4753         }
4754
4755         /**
4756          * @param string $wikitext
4757          * @return string
4758          * @since 1.29
4759          */
4760         protected function addNewLineAtEnd( $wikitext ) {
4761                 if ( strval( $wikitext ) !== '' ) {
4762                         // Ensure there's a newline at the end, otherwise adding lines
4763                         // is awkward.
4764                         // But don't add a newline if the text is empty, or Firefox in XHTML
4765                         // mode will show an extra newline. A bit annoying.
4766                         $wikitext .= "\n";
4767                         return $wikitext;
4768                 }
4769                 return $wikitext;
4770         }
4771
4772         /**
4773          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4774          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4775          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4776          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4777          * spread the new style links more efficiently.
4778          *
4779          * @param string $text
4780          * @return string
4781          */
4782         private function guessSectionName( $text ) {
4783                 global $wgParser;
4784
4785                 // Detect Microsoft browsers
4786                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4787                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4788                         // ...and redirect them to legacy encoding, if available
4789                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4790                 }
4791                 // Meanwhile, real browsers get real anchors
4792                 return $wgParser->guessSectionNameFromWikiText( $text );
4793         }
4794 }