includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\Logger\LoggerFactory;
  24 use MediaWiki\MediaWikiServices;
  25 use Wikimedia\ScopedCallback;
  26
  27 /**
  28  * The edit page/HTML interface (split from Article)
  29  * The actual database and text munging is still in Article,
  30  * but it should get easier to call those from alternate
  31  * interfaces.
  32  *
  33  * EditPage cares about two distinct titles:
  34  * $this->mContextTitle is the page that forms submit to, links point to,
  35  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  36  * page in the database that is actually being edited. These are
  37  * usually the same, but they are now allowed to be different.
  38  *
  39  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  40  * headaches, which may be fatal.
  41  */
  42 class EditPage {
  43         /**
  44          * Status: Article successfully updated
  45          */
  46         const AS_SUCCESS_UPDATE = 200;
  47
  48         /**
  49          * Status: Article successfully created
  50          */
  51         const AS_SUCCESS_NEW_ARTICLE = 201;
  52
  53         /**
  54          * Status: Article update aborted by a hook function
  55          */
  56         const AS_HOOK_ERROR = 210;
  57
  58         /**
  59          * Status: A hook function returned an error
  60          */
  61         const AS_HOOK_ERROR_EXPECTED = 212;
  62
  63         /**
  64          * Status: User is blocked from editing this page
  65          */
  66         const AS_BLOCKED_PAGE_FOR_USER = 215;
  67
  68         /**
  69          * Status: Content too big (> $wgMaxArticleSize)
  70          */
  71         const AS_CONTENT_TOO_BIG = 216;
  72
  73         /**
  74          * Status: this anonymous user is not allowed to edit this page
  75          */
  76         const AS_READ_ONLY_PAGE_ANON = 218;
  77
  78         /**
  79          * Status: this logged in user is not allowed to edit this page
  80          */
  81         const AS_READ_ONLY_PAGE_LOGGED = 219;
  82
  83         /**
  84          * Status: wiki is in readonly mode (wfReadOnly() == true)
  85          */
  86         const AS_READ_ONLY_PAGE = 220;
  87
  88         /**
  89          * Status: rate limiter for action 'edit' was tripped
  90          */
  91         const AS_RATE_LIMITED = 221;
  92
  93         /**
  94          * Status: article was deleted while editing and param wpRecreate == false or form
  95          * was not posted
  96          */
  97         const AS_ARTICLE_WAS_DELETED = 222;
  98
  99         /**
 100          * Status: user tried to create this page, but is not allowed to do that
 101          * ( Title->userCan('create') == false )
 102          */
 103         const AS_NO_CREATE_PERMISSION = 223;
 104
 105         /**
 106          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 107          */
 108         const AS_BLANK_ARTICLE = 224;
 109
 110         /**
 111          * Status: (non-resolvable) edit conflict
 112          */
 113         const AS_CONFLICT_DETECTED = 225;
 114
 115         /**
 116          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 117          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 118          */
 119         const AS_SUMMARY_NEEDED = 226;
 120
 121         /**
 122          * Status: user tried to create a new section without content
 123          */
 124         const AS_TEXTBOX_EMPTY = 228;
 125
 126         /**
 127          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 128          */
 129         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 130
 131         /**
 132          * Status: WikiPage::doEdit() was unsuccessful
 133          */
 134         const AS_END = 231;
 135
 136         /**
 137          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 138          */
 139         const AS_SPAM_ERROR = 232;
 140
 141         /**
 142          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 143          */
 144         const AS_IMAGE_REDIRECT_ANON = 233;
 145
 146         /**
 147          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 148          */
 149         const AS_IMAGE_REDIRECT_LOGGED = 234;
 150
 151         /**
 152          * Status: user tried to modify the content model, but is not allowed to do that
 153          * ( User::isAllowed('editcontentmodel') == false )
 154          */
 155         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 156
 157         /**
 158          * Status: user tried to create self-redirect (redirect to the same article) and
 159          * wpIgnoreSelfRedirect == false
 160          */
 161         const AS_SELF_REDIRECT = 236;
 162
 163         /**
 164          * Status: an error relating to change tagging. Look at the message key for
 165          * more details
 166          */
 167         const AS_CHANGE_TAG_ERROR = 237;
 168
 169         /**
 170          * Status: can't parse content
 171          */
 172         const AS_PARSE_ERROR = 240;
 173
 174         /**
 175          * Status: when changing the content model is disallowed due to
 176          * $wgContentHandlerUseDB being false
 177          */
 178         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 179
 180         /**
 181          * HTML id and name for the beginning of the edit form.
 182          */
 183         const EDITFORM_ID = 'editform';
 184
 185         /**
 186          * Prefix of key for cookie used to pass post-edit state.
 187          * The revision id edited is added after this
 188          */
 189         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 190
 191         /**
 192          * Duration of PostEdit cookie, in seconds.
 193          * The cookie will be removed instantly if the JavaScript runs.
 194          *
 195          * Otherwise, though, we don't want the cookies to accumulate.
 196          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 197          * limit of only 20 cookies per domain. This still applies at least to some
 198          * versions of IE without full updates:
 199          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 200          *
 201          * A value of 20 minutes should be enough to take into account slow loads and minor
 202          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 203          */
 204         const POST_EDIT_COOKIE_DURATION = 1200;
 205
 206         /** @var Article */
 207         public $mArticle;
 208         /** @var WikiPage */
 209         private $page;
 210
 211         /** @var Title */
 212         public $mTitle;
 213
 214         /** @var null|Title */
 215         private $mContextTitle = null;
 216
 217         /** @var string */
 218         public $action = 'submit';
 219
 220         /** @var bool */
 221         public $isConflict = false;
 222
 223         /** @var bool */
 224         public $isCssJsSubpage = false;
 225
 226         /** @var bool */
 227         public $isCssSubpage = false;
 228
 229         /** @var bool */
 230         public $isJsSubpage = false;
 231
 232         /** @var bool */
 233         public $isWrongCaseCssJsPage = false;
 234
 235         /** @var bool New page or new section */
 236         public $isNew = false;
 237
 238         /** @var bool */
 239         public $deletedSinceEdit;
 240
 241         /** @var string */
 242         public $formtype;
 243
 244         /** @var bool */
 245         public $firsttime;
 246
 247         /** @var bool|stdClass */
 248         public $lastDelete;
 249
 250         /** @var bool */
 251         public $mTokenOk = false;
 252
 253         /** @var bool */
 254         public $mTokenOkExceptSuffix = false;
 255
 256         /** @var bool */
 257         public $mTriedSave = false;
 258
 259         /** @var bool */
 260         public $incompleteForm = false;
 261
 262         /** @var bool */
 263         public $tooBig = false;
 264
 265         /** @var bool */
 266         public $missingComment = false;
 267
 268         /** @var bool */
 269         public $missingSummary = false;
 270
 271         /** @var bool */
 272         public $allowBlankSummary = false;
 273
 274         /** @var bool */
 275         protected $blankArticle = false;
 276
 277         /** @var bool */
 278         protected $allowBlankArticle = false;
 279
 280         /** @var bool */
 281         protected $selfRedirect = false;
 282
 283         /** @var bool */
 284         protected $allowSelfRedirect = false;
 285
 286         /** @var string */
 287         public $autoSumm = '';
 288
 289         /** @var string */
 290         public $hookError = '';
 291
 292         /** @var ParserOutput */
 293         public $mParserOutput;
 294
 295         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 296         public $hasPresetSummary = false;
 297
 298         /** @var Revision|bool */
 299         public $mBaseRevision = false;
 300
 301         /** @var bool */
 302         public $mShowSummaryField = true;
 303
 304         # Form values
 305
 306         /** @var bool */
 307         public $save = false;
 308
 309         /** @var bool */
 310         public $preview = false;
 311
 312         /** @var bool */
 313         public $diff = false;
 314
 315         /** @var bool */
 316         public $minoredit = false;
 317
 318         /** @var bool */
 319         public $watchthis = false;
 320
 321         /** @var bool */
 322         public $recreate = false;
 323
 324         /** @var string */
 325         public $textbox1 = '';
 326
 327         /** @var string */
 328         public $textbox2 = '';
 329
 330         /** @var string */
 331         public $summary = '';
 332
 333         /** @var bool */
 334         public $nosummary = false;
 335
 336         /** @var string */
 337         public $edittime = '';
 338
 339         /** @var int */
 340         private $editRevId = null;
 341
 342         /** @var string */
 343         public $section = '';
 344
 345         /** @var string */
 346         public $sectiontitle = '';
 347
 348         /** @var string */
 349         public $starttime = '';
 350
 351         /** @var int */
 352         public $oldid = 0;
 353
 354         /** @var int */
 355         public $parentRevId = 0;
 356
 357         /** @var string */
 358         public $editintro = '';
 359
 360         /** @var null */
 361         public $scrolltop = null;
 362
 363         /** @var bool */
 364         public $bot = true;
 365
 366         /** @var string */
 367         public $contentModel;
 368
 369         /** @var null|string */
 370         public $contentFormat = null;
 371
 372         /** @var null|array */
 373         private $changeTags = null;
 374
 375         # Placeholders for text injection by hooks (must be HTML)
 376         # extensions should take care to _append_ to the present value
 377
 378         /** @var string Before even the preview */
 379         public $editFormPageTop = '';
 380         public $editFormTextTop = '';
 381         public $editFormTextBeforeContent = '';
 382         public $editFormTextAfterWarn = '';
 383         public $editFormTextAfterTools = '';
 384         public $editFormTextBottom = '';
 385         public $editFormTextAfterContent = '';
 386         public $previewTextAfterContent = '';
 387         public $mPreloadContent = null;
 388
 389         /* $didSave should be set to true whenever an article was successfully altered. */
 390         public $didSave = false;
 391         public $undidRev = 0;
 392
 393         public $suppressIntro = false;
 394
 395         /** @var bool */
 396         protected $edit;
 397
 398         /** @var bool|int */
 399         protected $contentLength = false;
 400
 401         /**
 402          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 403          */
 404         private $enableApiEditOverride = false;
 405
 406         /**
 407          * @var IContextSource
 408          */
 409         protected $context;
 410
 411         /**
 412          * @var bool Whether an old revision is edited
 413          */
 414         private $isOldRev = false;
 415
 416         /**
 417          * @param Article $article
 418          */
 419         public function __construct( Article $article ) {
 420                 $this->mArticle = $article;
 421                 $this->page = $article->getPage(); // model object
 422                 $this->mTitle = $article->getTitle();
 423                 $this->context = $article->getContext();
 424
 425                 $this->contentModel = $this->mTitle->getContentModel();
 426
 427                 $handler = ContentHandler::getForModelID( $this->contentModel );
 428                 $this->contentFormat = $handler->getDefaultFormat();
 429         }
 430
 431         /**
 432          * @return Article
 433          */
 434         public function getArticle() {
 435                 return $this->mArticle;
 436         }
 437
 438         /**
 439          * @since 1.28
 440          * @return IContextSource
 441          */
 442         public function getContext() {
 443                 return $this->context;
 444         }
 445
 446         /**
 447          * @since 1.19
 448          * @return Title
 449          */
 450         public function getTitle() {
 451                 return $this->mTitle;
 452         }
 453
 454         /**
 455          * Set the context Title object
 456          *
 457          * @param Title|null $title Title object or null
 458          */
 459         public function setContextTitle( $title ) {
 460                 $this->mContextTitle = $title;
 461         }
 462
 463         /**
 464          * Get the context title object.
 465          * If not set, $wgTitle will be returned. This behavior might change in
 466          * the future to return $this->mTitle instead.
 467          *
 468          * @return Title
 469          */
 470         public function getContextTitle() {
 471                 if ( is_null( $this->mContextTitle ) ) {
 472                         global $wgTitle;
 473                         return $wgTitle;
 474                 } else {
 475                         return $this->mContextTitle;
 476                 }
 477         }
 478
 479         /**
 480          * Check if the edit page is using OOUI controls
 481          * @return bool Always true
 482          * @deprecated since 1.30
 483          */
 484         public function isOouiEnabled() {
 485                 return true;
 486         }
 487
 488         /**
 489          * Returns if the given content model is editable.
 490          *
 491          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 492          * @return bool
 493          * @throws MWException If $modelId has no known handler
 494          */
 495         public function isSupportedContentModel( $modelId ) {
 496                 return $this->enableApiEditOverride === true ||
 497                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 498         }
 499
 500         /**
 501          * Allow editing of content that supports API direct editing, but not general
 502          * direct editing. Set to false by default.
 503          *
 504          * @param bool $enableOverride
 505          */
 506         public function setApiEditOverride( $enableOverride ) {
 507                 $this->enableApiEditOverride = $enableOverride;
 508         }
 509
 510         /**
 511          * @deprecated since 1.29, call edit directly
 512          */
 513         public function submit() {
 514                 wfDeprecated( __METHOD__, '1.29' );
 515                 $this->edit();
 516         }
 517
 518         /**
 519          * This is the function that gets called for "action=edit". It
 520          * sets up various member variables, then passes execution to
 521          * another function, usually showEditForm()
 522          *
 523          * The edit form is self-submitting, so that when things like
 524          * preview and edit conflicts occur, we get the same form back
 525          * with the extra stuff added.  Only when the final submission
 526          * is made and all is well do we actually save and redirect to
 527          * the newly-edited page.
 528          */
 529         public function edit() {
 530                 // Allow extensions to modify/prevent this form or submission
 531                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 532                         return;
 533                 }
 534
 535                 wfDebug( __METHOD__ . ": enter\n" );
 536
 537                 $request = $this->context->getRequest();
 538                 // If they used redlink=1 and the page exists, redirect to the main article
 539                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 540                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 541                         return;
 542                 }
 543
 544                 $this->importFormData( $request );
 545                 $this->firsttime = false;
 546
 547                 if ( wfReadOnly() && $this->save ) {
 548                         // Force preview
 549                         $this->save = false;
 550                         $this->preview = true;
 551                 }
 552
 553                 if ( $this->save ) {
 554                         $this->formtype = 'save';
 555                 } elseif ( $this->preview ) {
 556                         $this->formtype = 'preview';
 557                 } elseif ( $this->diff ) {
 558                         $this->formtype = 'diff';
 559                 } else { # First time through
 560                         $this->firsttime = true;
 561                         if ( $this->previewOnOpen() ) {
 562                                 $this->formtype = 'preview';
 563                         } else {
 564                                 $this->formtype = 'initial';
 565                         }
 566                 }
 567
 568                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 569                 if ( $permErrors ) {
 570                         wfDebug( __METHOD__ . ": User can't edit\n" );
 571                         // Auto-block user's IP if the account was "hard" blocked
 572                         if ( !wfReadOnly() ) {
 573                                 DeferredUpdates::addCallableUpdate( function () {
 574                                         $this->context->getUser()->spreadAnyEditBlock();
 575                                 } );
 576                         }
 577                         $this->displayPermissionsError( $permErrors );
 578
 579                         return;
 580                 }
 581
 582                 $revision = $this->mArticle->getRevisionFetched();
 583                 // Disallow editing revisions with content models different from the current one
 584                 // Undo edits being an exception in order to allow reverting content model changes.
 585                 if ( $revision
 586                         && $revision->getContentModel() !== $this->contentModel
 587                 ) {
 588                         $prevRev = null;
 589                         if ( $this->undidRev ) {
 590                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 591                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 592                         }
 593                         if ( !$this->undidRev
 594                                 || !$prevRev
 595                                 || $prevRev->getContentModel() !== $this->contentModel
 596                         ) {
 597                                 $this->displayViewSourcePage(
 598                                         $this->getContentObject(),
 599                                         $this->context->msg(
 600                                                 'contentmodelediterror',
 601                                                 $revision->getContentModel(),
 602                                                 $this->contentModel
 603                                         )->plain()
 604                                 );
 605                                 return;
 606                         }
 607                 }
 608
 609                 $this->isConflict = false;
 610                 // css / js subpages of user pages get a special treatment
 611                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 612                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 613                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 614                 // @todo FIXME: Silly assignment.
 615                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 616
 617                 # Show applicable editing introductions
 618                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 619                         $this->showIntro();
 620                 }
 621
 622                 # Attempt submission here.  This will check for edit conflicts,
 623                 # and redundantly check for locked database, blocked IPs, etc.
 624                 # that edit() already checked just in case someone tries to sneak
 625                 # in the back door with a hand-edited submission URL.
 626
 627                 if ( 'save' == $this->formtype ) {
 628                         $resultDetails = null;
 629                         $status = $this->attemptSave( $resultDetails );
 630                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 631                                 return;
 632                         }
 633                 }
 634
 635                 # First time through: get contents, set time for conflict
 636                 # checking, etc.
 637                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 638                         if ( $this->initialiseForm() === false ) {
 639                                 $this->noSuchSectionPage();
 640                                 return;
 641                         }
 642
 643                         if ( !$this->mTitle->getArticleID() ) {
 644                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 645                         } else {
 646                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 647                         }
 648
 649                 }
 650
 651                 $this->showEditForm();
 652         }
 653
 654         /**
 655          * @param string $rigor Same format as Title::getUserPermissionErrors()
 656          * @return array
 657          */
 658         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 659                 $user = $this->context->getUser();
 660                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 661                 # Can this title be created?
 662                 if ( !$this->mTitle->exists() ) {
 663                         $permErrors = array_merge(
 664                                 $permErrors,
 665                                 wfArrayDiff2(
 666                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 667                                         $permErrors
 668                                 )
 669                         );
 670                 }
 671                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 672                 $remove = [];
 673                 foreach ( $permErrors as $error ) {
 674                         if ( ( $this->preview || $this->diff )
 675                                 && (
 676                                         $error[0] == 'blockedtext' ||
 677                                         $error[0] == 'autoblockedtext' ||
 678                                         $error[0] == 'systemblockedtext'
 679                                 )
 680                         ) {
 681                                 $remove[] = $error;
 682                         }
 683                 }
 684                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 685
 686                 return $permErrors;
 687         }
 688
 689         /**
 690          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 691          * but with the following differences:
 692          * - If redlink=1, the user will be redirected to the page
 693          * - If there is content to display or the error occurs while either saving,
 694          *   previewing or showing the difference, it will be a
 695          *   "View source for ..." page displaying the source code after the error message.
 696          *
 697          * @since 1.19
 698          * @param array $permErrors Array of permissions errors, as returned by
 699          *    Title::getUserPermissionsErrors().
 700          * @throws PermissionsError
 701          */
 702         protected function displayPermissionsError( array $permErrors ) {
 703                 $out = $this->context->getOutput();
 704                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 705                         // The edit page was reached via a red link.
 706                         // Redirect to the article page and let them click the edit tab if
 707                         // they really want a permission error.
 708                         $out->redirect( $this->mTitle->getFullURL() );
 709                         return;
 710                 }
 711
 712                 $content = $this->getContentObject();
 713
 714                 # Use the normal message if there's nothing to display
 715                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 716                         $action = $this->mTitle->exists() ? 'edit' :
 717                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 718                         throw new PermissionsError( $action, $permErrors );
 719                 }
 720
 721                 $this->displayViewSourcePage(
 722                         $content,
 723                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 724                 );
 725         }
 726
 727         /**
 728          * Display a read-only View Source page
 729          * @param Content $content content object
 730          * @param string $errorMessage additional wikitext error message to display
 731          */
 732         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 733                 $out = $this->context->getOutput();
 734                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 735
 736                 $out->setRobotPolicy( 'noindex,nofollow' );
 737                 $out->setPageTitle( $this->context->msg(
 738                         'viewsource-title',
 739                         $this->getContextTitle()->getPrefixedText()
 740                 ) );
 741                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 742                 $out->addHTML( $this->editFormPageTop );
 743                 $out->addHTML( $this->editFormTextTop );
 744
 745                 if ( $errorMessage !== '' ) {
 746                         $out->addWikiText( $errorMessage );
 747                         $out->addHTML( "<hr />\n" );
 748                 }
 749
 750                 # If the user made changes, preserve them when showing the markup
 751                 # (This happens when a user is blocked during edit, for instance)
 752                 if ( !$this->firsttime ) {
 753                         $text = $this->textbox1;
 754                         $out->addWikiMsg( 'viewyourtext' );
 755                 } else {
 756                         try {
 757                                 $text = $this->toEditText( $content );
 758                         } catch ( MWException $e ) {
 759                                 # Serialize using the default format if the content model is not supported
 760                                 # (e.g. for an old revision with a different model)
 761                                 $text = $content->serialize();
 762                         }
 763                         $out->addWikiMsg( 'viewsourcetext' );
 764                 }
 765
 766                 $out->addHTML( $this->editFormTextBeforeContent );
 767                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 768                 $out->addHTML( $this->editFormTextAfterContent );
 769
 770                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 771
 772                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 773
 774                 $out->addHTML( $this->editFormTextBottom );
 775                 if ( $this->mTitle->exists() ) {
 776                         $out->returnToMain( null, $this->mTitle );
 777                 }
 778         }
 779
 780         /**
 781          * Should we show a preview when the edit form is first shown?
 782          *
 783          * @return bool
 784          */
 785         protected function previewOnOpen() {
 786                 global $wgPreviewOnOpenNamespaces;
 787                 $request = $this->context->getRequest();
 788                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 789                         // Explicit override from request
 790                         return true;
 791                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 792                         // Explicit override from request
 793                         return false;
 794                 } elseif ( $this->section == 'new' ) {
 795                         // Nothing *to* preview for new sections
 796                         return false;
 797                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 798                         && $this->context->getUser()->getOption( 'previewonfirst' )
 799                 ) {
 800                         // Standard preference behavior
 801                         return true;
 802                 } elseif ( !$this->mTitle->exists()
 803                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 804                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 805                 ) {
 806                         // Categories are special
 807                         return true;
 808                 } else {
 809                         return false;
 810                 }
 811         }
 812
 813         /**
 814          * Checks whether the user entered a skin name in uppercase,
 815          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 816          *
 817          * @return bool
 818          */
 819         protected function isWrongCaseCssJsPage() {
 820                 if ( $this->mTitle->isCssJsSubpage() ) {
 821                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 822                         $skins = array_merge(
 823                                 array_keys( Skin::getSkinNames() ),
 824                                 [ 'common' ]
 825                         );
 826                         return !in_array( $name, $skins )
 827                                 && in_array( strtolower( $name ), $skins );
 828                 } else {
 829                         return false;
 830                 }
 831         }
 832
 833         /**
 834          * Returns whether section editing is supported for the current page.
 835          * Subclasses may override this to replace the default behavior, which is
 836          * to check ContentHandler::supportsSections.
 837          *
 838          * @return bool True if this edit page supports sections, false otherwise.
 839          */
 840         protected function isSectionEditSupported() {
 841                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 842                 return $contentHandler->supportsSections();
 843         }
 844
 845         /**
 846          * This function collects the form data and uses it to populate various member variables.
 847          * @param WebRequest &$request
 848          * @throws ErrorPageError
 849          */
 850         public function importFormData( &$request ) {
 851                 # Section edit can come from either the form or a link
 852                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 853
 854                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 855                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 856                 }
 857
 858                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 859
 860                 if ( $request->wasPosted() ) {
 861                         # These fields need to be checked for encoding.
 862                         # Also remove trailing whitespace, but don't remove _initial_
 863                         # whitespace from the text boxes. This may be significant formatting.
 864                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 865                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 866                                 // Skip this if wpTextbox2 has input, it indicates that we came
 867                                 // from a conflict page with raw page text, not a custom form
 868                                 // modified by subclasses
 869                                 $textbox1 = $this->importContentFormData( $request );
 870                                 if ( $textbox1 !== null ) {
 871                                         $this->textbox1 = $textbox1;
 872                                 }
 873                         }
 874
 875                         $this->summary = $request->getText( 'wpSummary' );
 876
 877                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 878                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 879                         # section titles.
 880                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 881
 882                         # Treat sectiontitle the same way as summary.
 883                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 884                         # currently doing double duty as both edit summary and section title. Right now this
 885                         # is just to allow API edits to work around this limitation, but this should be
 886                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 887                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 888                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 889
 890                         $this->edittime = $request->getVal( 'wpEdittime' );
 891                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 892                         $this->starttime = $request->getVal( 'wpStarttime' );
 893
 894                         $undidRev = $request->getInt( 'wpUndidRevision' );
 895                         if ( $undidRev ) {
 896                                 $this->undidRev = $undidRev;
 897                         }
 898
 899                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 900
 901                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 902                                 // wpTextbox1 field is missing, possibly due to being "too big"
 903                                 // according to some filter rules such as Suhosin's setting for
 904                                 // suhosin.request.max_value_length (d'oh)
 905                                 $this->incompleteForm = true;
 906                         } else {
 907                                 // If we receive the last parameter of the request, we can fairly
 908                                 // claim the POST request has not been truncated.
 909
 910                                 // TODO: softened the check for cutover.  Once we determine
 911                                 // that it is safe, we should complete the transition by
 912                                 // removing the "edittime" clause.
 913                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 914                                         && is_null( $this->edittime ) );
 915                         }
 916                         if ( $this->incompleteForm ) {
 917                                 # If the form is incomplete, force to preview.
 918                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 919                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 920                                 $this->preview = true;
 921                         } else {
 922                                 $this->preview = $request->getCheck( 'wpPreview' );
 923                                 $this->diff = $request->getCheck( 'wpDiff' );
 924
 925                                 // Remember whether a save was requested, so we can indicate
 926                                 // if we forced preview due to session failure.
 927                                 $this->mTriedSave = !$this->preview;
 928
 929                                 if ( $this->tokenOk( $request ) ) {
 930                                         # Some browsers will not report any submit button
 931                                         # if the user hits enter in the comment box.
 932                                         # The unmarked state will be assumed to be a save,
 933                                         # if the form seems otherwise complete.
 934                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 935                                 } elseif ( $this->diff ) {
 936                                         # Failed token check, but only requested "Show Changes".
 937                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 938                                 } else {
 939                                         # Page might be a hack attempt posted from
 940                                         # an external site. Preview instead of saving.
 941                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 942                                         $this->preview = true;
 943                                 }
 944                         }
 945                         $this->save = !$this->preview && !$this->diff;
 946                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 947                                 $this->edittime = null;
 948                         }
 949
 950                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 951                                 $this->starttime = null;
 952                         }
 953
 954                         $this->recreate = $request->getCheck( 'wpRecreate' );
 955
 956                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 957                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 958
 959                         $user = $this->context->getUser();
 960                         # Don't force edit summaries when a user is editing their own user or talk page
 961                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 962                                 && $this->mTitle->getText() == $user->getName()
 963                         ) {
 964                                 $this->allowBlankSummary = true;
 965                         } else {
 966                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 967                                         || !$user->getOption( 'forceeditsummary' );
 968                         }
 969
 970                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 971
 972                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 973                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 974
 975                         $changeTags = $request->getVal( 'wpChangeTags' );
 976                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 977                                 $this->changeTags = [];
 978                         } else {
 979                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 980                                         $changeTags ) ) );
 981                         }
 982                 } else {
 983                         # Not a posted form? Start with nothing.
 984                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 985                         $this->textbox1 = '';
 986                         $this->summary = '';
 987                         $this->sectiontitle = '';
 988                         $this->edittime = '';
 989                         $this->editRevId = null;
 990                         $this->starttime = wfTimestampNow();
 991                         $this->edit = false;
 992                         $this->preview = false;
 993                         $this->save = false;
 994                         $this->diff = false;
 995                         $this->minoredit = false;
 996                         // Watch may be overridden by request parameters
 997                         $this->watchthis = $request->getBool( 'watchthis', false );
 998                         $this->recreate = false;
 999
1000                         // When creating a new section, we can preload a section title by passing it as the
1001                         // preloadtitle parameter in the URL (T15100)
1002                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1003                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1004                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1005                                 $this->summary = $request->getVal( 'preloadtitle' );
1006                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1007                                 $this->summary = $request->getText( 'summary' );
1008                                 if ( $this->summary !== '' ) {
1009                                         $this->hasPresetSummary = true;
1010                                 }
1011                         }
1012
1013                         if ( $request->getVal( 'minor' ) ) {
1014                                 $this->minoredit = true;
1015                         }
1016                 }
1017
1018                 $this->oldid = $request->getInt( 'oldid' );
1019                 $this->parentRevId = $request->getInt( 'parentRevId' );
1020
1021                 $this->bot = $request->getBool( 'bot', true );
1022                 $this->nosummary = $request->getBool( 'nosummary' );
1023
1024                 // May be overridden by revision.
1025                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1026                 // May be overridden by revision.
1027                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1028
1029                 try {
1030                         $handler = ContentHandler::getForModelID( $this->contentModel );
1031                 } catch ( MWUnknownContentModelException $e ) {
1032                         throw new ErrorPageError(
1033                                 'editpage-invalidcontentmodel-title',
1034                                 'editpage-invalidcontentmodel-text',
1035                                 [ wfEscapeWikiText( $this->contentModel ) ]
1036                         );
1037                 }
1038
1039                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1040                         throw new ErrorPageError(
1041                                 'editpage-notsupportedcontentformat-title',
1042                                 'editpage-notsupportedcontentformat-text',
1043                                 [
1044                                         wfEscapeWikiText( $this->contentFormat ),
1045                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1046                                 ]
1047                         );
1048                 }
1049
1050                 /**
1051                  * @todo Check if the desired model is allowed in this namespace, and if
1052                  *   a transition from the page's current model to the new model is
1053                  *   allowed.
1054                  */
1055
1056                 $this->editintro = $request->getText( 'editintro',
1057                         // Custom edit intro for new sections
1058                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1059
1060                 // Allow extensions to modify form data
1061                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1062         }
1063
1064         /**
1065          * Subpage overridable method for extracting the page content data from the
1066          * posted form to be placed in $this->textbox1, if using customized input
1067          * this method should be overridden and return the page text that will be used
1068          * for saving, preview parsing and so on...
1069          *
1070          * @param WebRequest &$request
1071          * @return string|null
1072          */
1073         protected function importContentFormData( &$request ) {
1074                 return; // Don't do anything, EditPage already extracted wpTextbox1
1075         }
1076
1077         /**
1078          * Initialise form fields in the object
1079          * Called on the first invocation, e.g. when a user clicks an edit link
1080          * @return bool If the requested section is valid
1081          */
1082         public function initialiseForm() {
1083                 $this->edittime = $this->page->getTimestamp();
1084                 $this->editRevId = $this->page->getLatest();
1085
1086                 $content = $this->getContentObject( false ); # TODO: track content object?!
1087                 if ( $content === false ) {
1088                         return false;
1089                 }
1090                 $this->textbox1 = $this->toEditText( $content );
1091
1092                 $user = $this->context->getUser();
1093                 // activate checkboxes if user wants them to be always active
1094                 # Sort out the "watch" checkbox
1095                 if ( $user->getOption( 'watchdefault' ) ) {
1096                         # Watch all edits
1097                         $this->watchthis = true;
1098                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1099                         # Watch creations
1100                         $this->watchthis = true;
1101                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1102                         # Already watched
1103                         $this->watchthis = true;
1104                 }
1105                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1106                         $this->minoredit = true;
1107                 }
1108                 if ( $this->textbox1 === false ) {
1109                         return false;
1110                 }
1111                 return true;
1112         }
1113
1114         /**
1115          * @param Content|null $def_content The default value to return
1116          *
1117          * @return Content|null Content on success, $def_content for invalid sections
1118          *
1119          * @since 1.21
1120          */
1121         protected function getContentObject( $def_content = null ) {
1122                 global $wgContLang;
1123
1124                 $content = false;
1125
1126                 $user = $this->context->getUser();
1127                 $request = $this->context->getRequest();
1128                 // For message page not locally set, use the i18n message.
1129                 // For other non-existent articles, use preload text if any.
1130                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1131                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1132                                 # If this is a system message, get the default text.
1133                                 $msg = $this->mTitle->getDefaultMessageText();
1134
1135                                 $content = $this->toEditContent( $msg );
1136                         }
1137                         if ( $content === false ) {
1138                                 # If requested, preload some text.
1139                                 $preload = $request->getVal( 'preload',
1140                                         // Custom preload text for new sections
1141                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1142                                 $params = $request->getArray( 'preloadparams', [] );
1143
1144                                 $content = $this->getPreloadedContent( $preload, $params );
1145                         }
1146                 // For existing pages, get text based on "undo" or section parameters.
1147                 } else {
1148                         if ( $this->section != '' ) {
1149                                 // Get section edit text (returns $def_text for invalid sections)
1150                                 $orig = $this->getOriginalContent( $user );
1151                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1152
1153                                 if ( !$content ) {
1154                                         $content = $def_content;
1155                                 }
1156                         } else {
1157                                 $undoafter = $request->getInt( 'undoafter' );
1158                                 $undo = $request->getInt( 'undo' );
1159
1160                                 if ( $undo > 0 && $undoafter > 0 ) {
1161                                         $undorev = Revision::newFromId( $undo );
1162                                         $oldrev = Revision::newFromId( $undoafter );
1163
1164                                         # Sanity check, make sure it's the right page,
1165                                         # the revisions exist and they were not deleted.
1166                                         # Otherwise, $content will be left as-is.
1167                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1168                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1169                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1170                                         ) {
1171                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1172
1173                                                 if ( $content === false ) {
1174                                                         # Warn the user that something went wrong
1175                                                         $undoMsg = 'failure';
1176                                                 } else {
1177                                                         $oldContent = $this->page->getContent( Revision::RAW );
1178                                                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1179                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1180                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1181                                                                 // The undo may change content
1182                                                                 // model if its reverting the top
1183                                                                 // edit. This can result in
1184                                                                 // mismatched content model/format.
1185                                                                 $this->contentModel = $newContent->getModel();
1186                                                                 $this->contentFormat = $oldrev->getContentFormat();
1187                                                         }
1188
1189                                                         if ( $newContent->equals( $oldContent ) ) {
1190                                                                 # Tell the user that the undo results in no change,
1191                                                                 # i.e. the revisions were already undone.
1192                                                                 $undoMsg = 'nochange';
1193                                                                 $content = false;
1194                                                         } else {
1195                                                                 # Inform the user of our success and set an automatic edit summary
1196                                                                 $undoMsg = 'success';
1197
1198                                                                 # If we just undid one rev, use an autosummary
1199                                                                 $firstrev = $oldrev->getNext();
1200                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1201                                                                         $userText = $undorev->getUserText();
1202                                                                         if ( $userText === '' ) {
1203                                                                                 $undoSummary = $this->context->msg(
1204                                                                                         'undo-summary-username-hidden',
1205                                                                                         $undo
1206                                                                                 )->inContentLanguage()->text();
1207                                                                         } else {
1208                                                                                 $undoSummary = $this->context->msg(
1209                                                                                         'undo-summary',
1210                                                                                         $undo,
1211                                                                                         $userText
1212                                                                                 )->inContentLanguage()->text();
1213                                                                         }
1214                                                                         if ( $this->summary === '' ) {
1215                                                                                 $this->summary = $undoSummary;
1216                                                                         } else {
1217                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1218                                                                                         ->inContentLanguage()->text() . $this->summary;
1219                                                                         }
1220                                                                         $this->undidRev = $undo;
1221                                                                 }
1222                                                                 $this->formtype = 'diff';
1223                                                         }
1224                                                 }
1225                                         } else {
1226                                                 // Failed basic sanity checks.
1227                                                 // Older revisions may have been removed since the link
1228                                                 // was created, or we may simply have got bogus input.
1229                                                 $undoMsg = 'norev';
1230                                         }
1231
1232                                         $out = $this->context->getOutput();
1233                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1234                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1235                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1236                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1237                                 }
1238
1239                                 if ( $content === false ) {
1240                                         $content = $this->getOriginalContent( $user );
1241                                 }
1242                         }
1243                 }
1244
1245                 return $content;
1246         }
1247
1248         /**
1249          * Get the content of the wanted revision, without section extraction.
1250          *
1251          * The result of this function can be used to compare user's input with
1252          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1253          * to the original text of the edit.
1254          *
1255          * This differs from Article::getContent() that when a missing revision is
1256          * encountered the result will be null and not the
1257          * 'missing-revision' message.
1258          *
1259          * @since 1.19
1260          * @param User $user The user to get the revision for
1261          * @return Content|null
1262          */
1263         private function getOriginalContent( User $user ) {
1264                 if ( $this->section == 'new' ) {
1265                         return $this->getCurrentContent();
1266                 }
1267                 $revision = $this->mArticle->getRevisionFetched();
1268                 if ( $revision === null ) {
1269                         $handler = ContentHandler::getForModelID( $this->contentModel );
1270                         return $handler->makeEmptyContent();
1271                 }
1272                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1273                 return $content;
1274         }
1275
1276         /**
1277          * Get the edit's parent revision ID
1278          *
1279          * The "parent" revision is the ancestor that should be recorded in this
1280          * page's revision history.  It is either the revision ID of the in-memory
1281          * article content, or in the case of a 3-way merge in order to rebase
1282          * across a recoverable edit conflict, the ID of the newer revision to
1283          * which we have rebased this page.
1284          *
1285          * @since 1.27
1286          * @return int Revision ID
1287          */
1288         public function getParentRevId() {
1289                 if ( $this->parentRevId ) {
1290                         return $this->parentRevId;
1291                 } else {
1292                         return $this->mArticle->getRevIdFetched();
1293                 }
1294         }
1295
1296         /**
1297          * Get the current content of the page. This is basically similar to
1298          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1299          * content object is returned instead of null.
1300          *
1301          * @since 1.21
1302          * @return Content
1303          */
1304         protected function getCurrentContent() {
1305                 $rev = $this->page->getRevision();
1306                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1307
1308                 if ( $content === false || $content === null ) {
1309                         $handler = ContentHandler::getForModelID( $this->contentModel );
1310                         return $handler->makeEmptyContent();
1311                 } elseif ( !$this->undidRev ) {
1312                         // Content models should always be the same since we error
1313                         // out if they are different before this point (in ->edit()).
1314                         // The exception being, during an undo, the current revision might
1315                         // differ from the prior revision.
1316                         $logger = LoggerFactory::getInstance( 'editpage' );
1317                         if ( $this->contentModel !== $rev->getContentModel() ) {
1318                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1319                                         'prev' => $this->contentModel,
1320                                         'new' => $rev->getContentModel(),
1321                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1322                                         'method' => __METHOD__
1323                                 ] );
1324                                 $this->contentModel = $rev->getContentModel();
1325                         }
1326
1327                         // Given that the content models should match, the current selected
1328                         // format should be supported.
1329                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1330                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1331
1332                                         'prev' => $this->contentFormat,
1333                                         'new' => $rev->getContentFormat(),
1334                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1335                                         'method' => __METHOD__
1336                                 ] );
1337                                 $this->contentFormat = $rev->getContentFormat();
1338                         }
1339                 }
1340                 return $content;
1341         }
1342
1343         /**
1344          * Use this method before edit() to preload some content into the edit box
1345          *
1346          * @param Content $content
1347          *
1348          * @since 1.21
1349          */
1350         public function setPreloadedContent( Content $content ) {
1351                 $this->mPreloadContent = $content;
1352         }
1353
1354         /**
1355          * Get the contents to be preloaded into the box, either set by
1356          * an earlier setPreloadText() or by loading the given page.
1357          *
1358          * @param string $preload Representing the title to preload from.
1359          * @param array $params Parameters to use (interface-message style) in the preloaded text
1360          *
1361          * @return Content
1362          *
1363          * @since 1.21
1364          */
1365         protected function getPreloadedContent( $preload, $params = [] ) {
1366                 if ( !empty( $this->mPreloadContent ) ) {
1367                         return $this->mPreloadContent;
1368                 }
1369
1370                 $handler = ContentHandler::getForModelID( $this->contentModel );
1371
1372                 if ( $preload === '' ) {
1373                         return $handler->makeEmptyContent();
1374                 }
1375
1376                 $user = $this->context->getUser();
1377                 $title = Title::newFromText( $preload );
1378                 # Check for existence to avoid getting MediaWiki:Noarticletext
1379                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1380                         // TODO: somehow show a warning to the user!
1381                         return $handler->makeEmptyContent();
1382                 }
1383
1384                 $page = WikiPage::factory( $title );
1385                 if ( $page->isRedirect() ) {
1386                         $title = $page->getRedirectTarget();
1387                         # Same as before
1388                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1389                                 // TODO: somehow show a warning to the user!
1390                                 return $handler->makeEmptyContent();
1391                         }
1392                         $page = WikiPage::factory( $title );
1393                 }
1394
1395                 $parserOptions = ParserOptions::newFromUser( $user );
1396                 $content = $page->getContent( Revision::RAW );
1397
1398                 if ( !$content ) {
1399                         // TODO: somehow show a warning to the user!
1400                         return $handler->makeEmptyContent();
1401                 }
1402
1403                 if ( $content->getModel() !== $handler->getModelID() ) {
1404                         $converted = $content->convert( $handler->getModelID() );
1405
1406                         if ( !$converted ) {
1407                                 // TODO: somehow show a warning to the user!
1408                                 wfDebug( "Attempt to preload incompatible content: " .
1409                                         "can't convert " . $content->getModel() .
1410                                         " to " . $handler->getModelID() );
1411
1412                                 return $handler->makeEmptyContent();
1413                         }
1414
1415                         $content = $converted;
1416                 }
1417
1418                 return $content->preloadTransform( $title, $parserOptions, $params );
1419         }
1420
1421         /**
1422          * Make sure the form isn't faking a user's credentials.
1423          *
1424          * @param WebRequest &$request
1425          * @return bool
1426          * @private
1427          */
1428         public function tokenOk( &$request ) {
1429                 $token = $request->getVal( 'wpEditToken' );
1430                 $user = $this->context->getUser();
1431                 $this->mTokenOk = $user->matchEditToken( $token );
1432                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1433                 return $this->mTokenOk;
1434         }
1435
1436         /**
1437          * Sets post-edit cookie indicating the user just saved a particular revision.
1438          *
1439          * This uses a temporary cookie for each revision ID so separate saves will never
1440          * interfere with each other.
1441          *
1442          * Article::view deletes the cookie on server-side after the redirect and
1443          * converts the value to the global JavaScript variable wgPostEdit.
1444          *
1445          * If the variable were set on the server, it would be cached, which is unwanted
1446          * since the post-edit state should only apply to the load right after the save.
1447          *
1448          * @param int $statusValue The status value (to check for new article status)
1449          */
1450         protected function setPostEditCookie( $statusValue ) {
1451                 $revisionId = $this->page->getLatest();
1452                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1453
1454                 $val = 'saved';
1455                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1456                         $val = 'created';
1457                 } elseif ( $this->oldid ) {
1458                         $val = 'restored';
1459                 }
1460
1461                 $response = $this->context->getRequest()->response();
1462                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1463         }
1464
1465         /**
1466          * Attempt submission
1467          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1468          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1469          * @return Status The resulting status object.
1470          */
1471         public function attemptSave( &$resultDetails = false ) {
1472                 # Allow bots to exempt some edits from bot flagging
1473                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1474                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1475
1476                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1477
1478                 return $status;
1479         }
1480
1481         /**
1482          * Log when a page was successfully saved after the edit conflict view
1483          */
1484         private function incrementResolvedConflicts() {
1485                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1486                         return;
1487                 }
1488
1489                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
1490                 $stats->increment( 'edit.failures.conflict.resolved' );
1491         }
1492
1493         /**
1494          * Handle status, such as after attempt save
1495          *
1496          * @param Status $status
1497          * @param array|bool $resultDetails
1498          *
1499          * @throws ErrorPageError
1500          * @return bool False, if output is done, true if rest of the form should be displayed
1501          */
1502         private function handleStatus( Status $status, $resultDetails ) {
1503                 /**
1504                  * @todo FIXME: once the interface for internalAttemptSave() is made
1505                  *   nicer, this should use the message in $status
1506                  */
1507                 if ( $status->value == self::AS_SUCCESS_UPDATE
1508                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1509                 ) {
1510                         $this->incrementResolvedConflicts();
1511
1512                         $this->didSave = true;
1513                         if ( !$resultDetails['nullEdit'] ) {
1514                                 $this->setPostEditCookie( $status->value );
1515                         }
1516                 }
1517
1518                 $out = $this->context->getOutput();
1519
1520                 // "wpExtraQueryRedirect" is a hidden input to modify
1521                 // after save URL and is not used by actual edit form
1522                 $request = $this->context->getRequest();
1523                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1524
1525                 switch ( $status->value ) {
1526                         case self::AS_HOOK_ERROR_EXPECTED:
1527                         case self::AS_CONTENT_TOO_BIG:
1528                         case self::AS_ARTICLE_WAS_DELETED:
1529                         case self::AS_CONFLICT_DETECTED:
1530                         case self::AS_SUMMARY_NEEDED:
1531                         case self::AS_TEXTBOX_EMPTY:
1532                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1533                         case self::AS_END:
1534                         case self::AS_BLANK_ARTICLE:
1535                         case self::AS_SELF_REDIRECT:
1536                                 return true;
1537
1538                         case self::AS_HOOK_ERROR:
1539                                 return false;
1540
1541                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1542                         case self::AS_PARSE_ERROR:
1543                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1544                                 return true;
1545
1546                         case self::AS_SUCCESS_NEW_ARTICLE:
1547                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1548                                 if ( $extraQueryRedirect ) {
1549                                         if ( $query === '' ) {
1550                                                 $query = $extraQueryRedirect;
1551                                         } else {
1552                                                 $query = $query . '&' . $extraQueryRedirect;
1553                                         }
1554                                 }
1555                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1556                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1557                                 return false;
1558
1559                         case self::AS_SUCCESS_UPDATE:
1560                                 $extraQuery = '';
1561                                 $sectionanchor = $resultDetails['sectionanchor'];
1562
1563                                 // Give extensions a chance to modify URL query on update
1564                                 Hooks::run(
1565                                         'ArticleUpdateBeforeRedirect',
1566                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1567                                 );
1568
1569                                 if ( $resultDetails['redirect'] ) {
1570                                         if ( $extraQuery == '' ) {
1571                                                 $extraQuery = 'redirect=no';
1572                                         } else {
1573                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1574                                         }
1575                                 }
1576                                 if ( $extraQueryRedirect ) {
1577                                         if ( $extraQuery === '' ) {
1578                                                 $extraQuery = $extraQueryRedirect;
1579                                         } else {
1580                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1581                                         }
1582                                 }
1583
1584                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1585                                 return false;
1586
1587                         case self::AS_SPAM_ERROR:
1588                                 $this->spamPageWithContent( $resultDetails['spam'] );
1589                                 return false;
1590
1591                         case self::AS_BLOCKED_PAGE_FOR_USER:
1592                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1593
1594                         case self::AS_IMAGE_REDIRECT_ANON:
1595                         case self::AS_IMAGE_REDIRECT_LOGGED:
1596                                 throw new PermissionsError( 'upload' );
1597
1598                         case self::AS_READ_ONLY_PAGE_ANON:
1599                         case self::AS_READ_ONLY_PAGE_LOGGED:
1600                                 throw new PermissionsError( 'edit' );
1601
1602                         case self::AS_READ_ONLY_PAGE:
1603                                 throw new ReadOnlyError;
1604
1605                         case self::AS_RATE_LIMITED:
1606                                 throw new ThrottledError();
1607
1608                         case self::AS_NO_CREATE_PERMISSION:
1609                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1610                                 throw new PermissionsError( $permission );
1611
1612                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1613                                 throw new PermissionsError( 'editcontentmodel' );
1614
1615                         default:
1616                                 // We don't recognize $status->value. The only way that can happen
1617                                 // is if an extension hook aborted from inside ArticleSave.
1618                                 // Render the status object into $this->hookError
1619                                 // FIXME this sucks, we should just use the Status object throughout
1620                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1621                                         '</div>';
1622                                 return true;
1623                 }
1624         }
1625
1626         /**
1627          * Run hooks that can filter edits just before they get saved.
1628          *
1629          * @param Content $content The Content to filter.
1630          * @param Status $status For reporting the outcome to the caller
1631          * @param User $user The user performing the edit
1632          *
1633          * @return bool
1634          */
1635         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1636                 // Run old style post-section-merge edit filter
1637                 if ( $this->hookError != '' ) {
1638                         # ...or the hook could be expecting us to produce an error
1639                         $status->fatal( 'hookaborted' );
1640                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1641                         return false;
1642                 }
1643
1644                 // Run new style post-section-merge edit filter
1645                 if ( !Hooks::run( 'EditFilterMergedContent',
1646                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1647                                 $user, $this->minoredit ] )
1648                 ) {
1649                         # Error messages etc. could be handled within the hook...
1650                         if ( $status->isGood() ) {
1651                                 $status->fatal( 'hookaborted' );
1652                                 // Not setting $this->hookError here is a hack to allow the hook
1653                                 // to cause a return to the edit page without $this->hookError
1654                                 // being set. This is used by ConfirmEdit to display a captcha
1655                                 // without any error message cruft.
1656                         } else {
1657                                 $this->hookError = $status->getWikiText();
1658                         }
1659                         // Use the existing $status->value if the hook set it
1660                         if ( !$status->value ) {
1661                                 $status->value = self::AS_HOOK_ERROR;
1662                         }
1663                         return false;
1664                 } elseif ( !$status->isOK() ) {
1665                         # ...or the hook could be expecting us to produce an error
1666                         // FIXME this sucks, we should just use the Status object throughout
1667                         $this->hookError = $status->getWikiText();
1668                         $status->fatal( 'hookaborted' );
1669                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1670                         return false;
1671                 }
1672
1673                 return true;
1674         }
1675
1676         /**
1677          * Return the summary to be used for a new section.
1678          *
1679          * @param string $sectionanchor Set to the section anchor text
1680          * @return string
1681          */
1682         private function newSectionSummary( &$sectionanchor = null ) {
1683                 global $wgParser;
1684
1685                 if ( $this->sectiontitle !== '' ) {
1686                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1687                         // If no edit summary was specified, create one automatically from the section
1688                         // title and have it link to the new section. Otherwise, respect the summary as
1689                         // passed.
1690                         if ( $this->summary === '' ) {
1691                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1692                                 return $this->context->msg( 'newsectionsummary' )
1693                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1694                         }
1695                 } elseif ( $this->summary !== '' ) {
1696                         $sectionanchor = $this->guessSectionName( $this->summary );
1697                         # This is a new section, so create a link to the new section
1698                         # in the revision summary.
1699                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1700                         return $this->context->msg( 'newsectionsummary' )
1701                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1702                 }
1703                 return $this->summary;
1704         }
1705
1706         /**
1707          * Attempt submission (no UI)
1708          *
1709          * @param array &$result Array to add statuses to, currently with the
1710          *   possible keys:
1711          *   - spam (string): Spam string from content if any spam is detected by
1712          *     matchSpamRegex.
1713          *   - sectionanchor (string): Section anchor for a section save.
1714          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1715          *     false otherwise.
1716          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1717          *     revision is a redirect.
1718          * @param bool $bot True if edit is being made under the bot right.
1719          *
1720          * @return Status Status object, possibly with a message, but always with
1721          *   one of the AS_* constants in $status->value,
1722          *
1723          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1724          *   various error display idiosyncrasies. There are also lots of cases
1725          *   where error metadata is set in the object and retrieved later instead
1726          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1727          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1728          * time.
1729          */
1730         public function internalAttemptSave( &$result, $bot = false ) {
1731                 global $wgMaxArticleSize;
1732                 global $wgContentHandlerUseDB;
1733
1734                 $status = Status::newGood();
1735                 $user = $this->context->getUser();
1736
1737                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1738                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1739                         $status->fatal( 'hookaborted' );
1740                         $status->value = self::AS_HOOK_ERROR;
1741                         return $status;
1742                 }
1743
1744                 $request = $this->context->getRequest();
1745                 $spam = $request->getText( 'wpAntispam' );
1746                 if ( $spam !== '' ) {
1747                         wfDebugLog(
1748                                 'SimpleAntiSpam',
1749                                 $user->getName() .
1750                                 ' editing "' .
1751                                 $this->mTitle->getPrefixedText() .
1752                                 '" submitted bogus field "' .
1753                                 $spam .
1754                                 '"'
1755                         );
1756                         $status->fatal( 'spamprotectionmatch', false );
1757                         $status->value = self::AS_SPAM_ERROR;
1758                         return $status;
1759                 }
1760
1761                 try {
1762                         # Construct Content object
1763                         $textbox_content = $this->toEditContent( $this->textbox1 );
1764                 } catch ( MWContentSerializationException $ex ) {
1765                         $status->fatal(
1766                                 'content-failed-to-parse',
1767                                 $this->contentModel,
1768                                 $this->contentFormat,
1769                                 $ex->getMessage()
1770                         );
1771                         $status->value = self::AS_PARSE_ERROR;
1772                         return $status;
1773                 }
1774
1775                 # Check image redirect
1776                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1777                         $textbox_content->isRedirect() &&
1778                         !$user->isAllowed( 'upload' )
1779                 ) {
1780                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1781                                 $status->setResult( false, $code );
1782
1783                                 return $status;
1784                 }
1785
1786                 # Check for spam
1787                 $match = self::matchSummarySpamRegex( $this->summary );
1788                 if ( $match === false && $this->section == 'new' ) {
1789                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1790                         # regular summaries, it is added to the actual wikitext.
1791                         if ( $this->sectiontitle !== '' ) {
1792                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1793                                 $match = self::matchSpamRegex( $this->sectiontitle );
1794                         } else {
1795                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1796                                 # is used with the 'summary' parameter.
1797                                 $match = self::matchSpamRegex( $this->summary );
1798                         }
1799                 }
1800                 if ( $match === false ) {
1801                         $match = self::matchSpamRegex( $this->textbox1 );
1802                 }
1803                 if ( $match !== false ) {
1804                         $result['spam'] = $match;
1805                         $ip = $request->getIP();
1806                         $pdbk = $this->mTitle->getPrefixedDBkey();
1807                         $match = str_replace( "\n", '', $match );
1808                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1809                         $status->fatal( 'spamprotectionmatch', $match );
1810                         $status->value = self::AS_SPAM_ERROR;
1811                         return $status;
1812                 }
1813                 if ( !Hooks::run(
1814                         'EditFilter',
1815                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1816                 ) {
1817                         # Error messages etc. could be handled within the hook...
1818                         $status->fatal( 'hookaborted' );
1819                         $status->value = self::AS_HOOK_ERROR;
1820                         return $status;
1821                 } elseif ( $this->hookError != '' ) {
1822                         # ...or the hook could be expecting us to produce an error
1823                         $status->fatal( 'hookaborted' );
1824                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1825                         return $status;
1826                 }
1827
1828                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1829                         // Auto-block user's IP if the account was "hard" blocked
1830                         if ( !wfReadOnly() ) {
1831                                 $user->spreadAnyEditBlock();
1832                         }
1833                         # Check block state against master, thus 'false'.
1834                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1835                         return $status;
1836                 }
1837
1838                 $this->contentLength = strlen( $this->textbox1 );
1839                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1840                         // Error will be displayed by showEditForm()
1841                         $this->tooBig = true;
1842                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1843                         return $status;
1844                 }
1845
1846                 if ( !$user->isAllowed( 'edit' ) ) {
1847                         if ( $user->isAnon() ) {
1848                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1849                                 return $status;
1850                         } else {
1851                                 $status->fatal( 'readonlytext' );
1852                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1853                                 return $status;
1854                         }
1855                 }
1856
1857                 $changingContentModel = false;
1858                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1859                         if ( !$wgContentHandlerUseDB ) {
1860                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1861                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1862                                 return $status;
1863                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1864                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1865                                 return $status;
1866                         }
1867                         // Make sure the user can edit the page under the new content model too
1868                         $titleWithNewContentModel = clone $this->mTitle;
1869                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1870                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1871                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1872                         ) {
1873                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1874                                 return $status;
1875                         }
1876
1877                         $changingContentModel = true;
1878                         $oldContentModel = $this->mTitle->getContentModel();
1879                 }
1880
1881                 if ( $this->changeTags ) {
1882                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1883                                 $this->changeTags, $user );
1884                         if ( !$changeTagsStatus->isOK() ) {
1885                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1886                                 return $changeTagsStatus;
1887                         }
1888                 }
1889
1890                 if ( wfReadOnly() ) {
1891                         $status->fatal( 'readonlytext' );
1892                         $status->value = self::AS_READ_ONLY_PAGE;
1893                         return $status;
1894                 }
1895                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1896                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1897                 ) {
1898                         $status->fatal( 'actionthrottledtext' );
1899                         $status->value = self::AS_RATE_LIMITED;
1900                         return $status;
1901                 }
1902
1903                 # If the article has been deleted while editing, don't save it without
1904                 # confirmation
1905                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1906                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1907                         return $status;
1908                 }
1909
1910                 # Load the page data from the master. If anything changes in the meantime,
1911                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1912                 $this->page->loadPageData( 'fromdbmaster' );
1913                 $new = !$this->page->exists();
1914
1915                 if ( $new ) {
1916                         // Late check for create permission, just in case *PARANOIA*
1917                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
1918                                 $status->fatal( 'nocreatetext' );
1919                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1920                                 wfDebug( __METHOD__ . ": no create permission\n" );
1921                                 return $status;
1922                         }
1923
1924                         // Don't save a new page if it's blank or if it's a MediaWiki:
1925                         // message with content equivalent to default (allow empty pages
1926                         // in this case to disable messages, see T52124)
1927                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1928                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1929                                 $defaultText = $defaultMessageText;
1930                         } else {
1931                                 $defaultText = '';
1932                         }
1933
1934                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1935                                 $this->blankArticle = true;
1936                                 $status->fatal( 'blankarticle' );
1937                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1938                                 return $status;
1939                         }
1940
1941                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
1942                                 return $status;
1943                         }
1944
1945                         $content = $textbox_content;
1946
1947                         $result['sectionanchor'] = '';
1948                         if ( $this->section == 'new' ) {
1949                                 if ( $this->sectiontitle !== '' ) {
1950                                         // Insert the section title above the content.
1951                                         $content = $content->addSectionHeader( $this->sectiontitle );
1952                                 } elseif ( $this->summary !== '' ) {
1953                                         // Insert the section title above the content.
1954                                         $content = $content->addSectionHeader( $this->summary );
1955                                 }
1956                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1957                         }
1958
1959                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1960
1961                 } else { # not $new
1962
1963                         # Article exists. Check for edit conflict.
1964
1965                         $this->page->clear(); # Force reload of dates, etc.
1966                         $timestamp = $this->page->getTimestamp();
1967                         $latest = $this->page->getLatest();
1968
1969                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1970
1971                         // Check editRevId if set, which handles same-second timestamp collisions
1972                         if ( $timestamp != $this->edittime
1973                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1974                         ) {
1975                                 $this->isConflict = true;
1976                                 if ( $this->section == 'new' ) {
1977                                         if ( $this->page->getUserText() == $user->getName() &&
1978                                                 $this->page->getComment() == $this->newSectionSummary()
1979                                         ) {
1980                                                 // Probably a duplicate submission of a new comment.
1981                                                 // This can happen when CDN resends a request after
1982                                                 // a timeout but the first one actually went through.
1983                                                 wfDebug( __METHOD__
1984                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1985                                         } else {
1986                                                 // New comment; suppress conflict.
1987                                                 $this->isConflict = false;
1988                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1989                                         }
1990                                 } elseif ( $this->section == ''
1991                                         && Revision::userWasLastToEdit(
1992                                                 DB_MASTER, $this->mTitle->getArticleID(),
1993                                                 $user->getId(), $this->edittime
1994                                         )
1995                                 ) {
1996                                         # Suppress edit conflict with self, except for section edits where merging is required.
1997                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1998                                         $this->isConflict = false;
1999                                 }
2000                         }
2001
2002                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2003                         if ( $this->sectiontitle !== '' ) {
2004                                 $sectionTitle = $this->sectiontitle;
2005                         } else {
2006                                 $sectionTitle = $this->summary;
2007                         }
2008
2009                         $content = null;
2010
2011                         if ( $this->isConflict ) {
2012                                 wfDebug( __METHOD__
2013                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2014                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2015                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2016                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2017                                 if ( $this->editRevId !== null ) {
2018                                         $content = $this->page->replaceSectionAtRev(
2019                                                 $this->section,
2020                                                 $textbox_content,
2021                                                 $sectionTitle,
2022                                                 $this->editRevId
2023                                         );
2024                                 } else {
2025                                         $content = $this->page->replaceSectionContent(
2026                                                 $this->section,
2027                                                 $textbox_content,
2028                                                 $sectionTitle,
2029                                                 $this->edittime
2030                                         );
2031                                 }
2032                         } else {
2033                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2034                                 $content = $this->page->replaceSectionContent(
2035                                         $this->section,
2036                                         $textbox_content,
2037                                         $sectionTitle
2038                                 );
2039                         }
2040
2041                         if ( is_null( $content ) ) {
2042                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2043                                 $this->isConflict = true;
2044                                 $content = $textbox_content; // do not try to merge here!
2045                         } elseif ( $this->isConflict ) {
2046                                 # Attempt merge
2047                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2048                                         // Successful merge! Maybe we should tell the user the good news?
2049                                         $this->isConflict = false;
2050                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2051                                 } else {
2052                                         $this->section = '';
2053                                         $this->textbox1 = ContentHandler::getContentText( $content );
2054                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2055                                 }
2056                         }
2057
2058                         if ( $this->isConflict ) {
2059                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2060                                 return $status;
2061                         }
2062
2063                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2064                                 return $status;
2065                         }
2066
2067                         if ( $this->section == 'new' ) {
2068                                 // Handle the user preference to force summaries here
2069                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2070                                         $this->missingSummary = true;
2071                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2072                                         $status->value = self::AS_SUMMARY_NEEDED;
2073                                         return $status;
2074                                 }
2075
2076                                 // Do not allow the user to post an empty comment
2077                                 if ( $this->textbox1 == '' ) {
2078                                         $this->missingComment = true;
2079                                         $status->fatal( 'missingcommenttext' );
2080                                         $status->value = self::AS_TEXTBOX_EMPTY;
2081                                         return $status;
2082                                 }
2083                         } elseif ( !$this->allowBlankSummary
2084                                 && !$content->equals( $this->getOriginalContent( $user ) )
2085                                 && !$content->isRedirect()
2086                                 && md5( $this->summary ) == $this->autoSumm
2087                         ) {
2088                                 $this->missingSummary = true;
2089                                 $status->fatal( 'missingsummary' );
2090                                 $status->value = self::AS_SUMMARY_NEEDED;
2091                                 return $status;
2092                         }
2093
2094                         # All's well
2095                         $sectionanchor = '';
2096                         if ( $this->section == 'new' ) {
2097                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2098                         } elseif ( $this->section != '' ) {
2099                                 # Try to get a section anchor from the section source, redirect
2100                                 # to edited section if header found.
2101                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2102                                 # for duplicate heading checking and maybe parsing.
2103                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2104                                 # We can't deal with anchors, includes, html etc in the header for now,
2105                                 # headline would need to be parsed to improve this.
2106                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2107                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2108                                 }
2109                         }
2110                         $result['sectionanchor'] = $sectionanchor;
2111
2112                         // Save errors may fall down to the edit form, but we've now
2113                         // merged the section into full text. Clear the section field
2114                         // so that later submission of conflict forms won't try to
2115                         // replace that into a duplicated mess.
2116                         $this->textbox1 = $this->toEditText( $content );
2117                         $this->section = '';
2118
2119                         $status->value = self::AS_SUCCESS_UPDATE;
2120                 }
2121
2122                 if ( !$this->allowSelfRedirect
2123                         && $content->isRedirect()
2124                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2125                 ) {
2126                         // If the page already redirects to itself, don't warn.
2127                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2128                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2129                                 $this->selfRedirect = true;
2130                                 $status->fatal( 'selfredirect' );
2131                                 $status->value = self::AS_SELF_REDIRECT;
2132                                 return $status;
2133                         }
2134                 }
2135
2136                 // Check for length errors again now that the section is merged in
2137                 $this->contentLength = strlen( $this->toEditText( $content ) );
2138                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2139                         $this->tooBig = true;
2140                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2141                         return $status;
2142                 }
2143
2144                 $flags = EDIT_AUTOSUMMARY |
2145                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2146                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2147                         ( $bot ? EDIT_FORCE_BOT : 0 );
2148
2149                 $doEditStatus = $this->page->doEditContent(
2150                         $content,
2151                         $this->summary,
2152                         $flags,
2153                         false,
2154                         $user,
2155                         $content->getDefaultFormat(),
2156                         $this->changeTags,
2157                         $this->undidRev
2158                 );
2159
2160                 if ( !$doEditStatus->isOK() ) {
2161                         // Failure from doEdit()
2162                         // Show the edit conflict page for certain recognized errors from doEdit(),
2163                         // but don't show it for errors from extension hooks
2164                         $errors = $doEditStatus->getErrorsArray();
2165                         if ( in_array( $errors[0][0],
2166                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2167                         ) {
2168                                 $this->isConflict = true;
2169                                 // Destroys data doEdit() put in $status->value but who cares
2170                                 $doEditStatus->value = self::AS_END;
2171                         }
2172                         return $doEditStatus;
2173                 }
2174
2175                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2176                 if ( $result['nullEdit'] ) {
2177                         // We don't know if it was a null edit until now, so increment here
2178                         $user->pingLimiter( 'linkpurge' );
2179                 }
2180                 $result['redirect'] = $content->isRedirect();
2181
2182                 $this->updateWatchlist();
2183
2184                 // If the content model changed, add a log entry
2185                 if ( $changingContentModel ) {
2186                         $this->addContentModelChangeLogEntry(
2187                                 $user,
2188                                 $new ? false : $oldContentModel,
2189                                 $this->contentModel,
2190                                 $this->summary
2191                         );
2192                 }
2193
2194                 return $status;
2195         }
2196
2197         /**
2198          * @param User $user
2199          * @param string|false $oldModel false if the page is being newly created
2200          * @param string $newModel
2201          * @param string $reason
2202          */
2203         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2204                 $new = $oldModel === false;
2205                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2206                 $log->setPerformer( $user );
2207                 $log->setTarget( $this->mTitle );
2208                 $log->setComment( $reason );
2209                 $log->setParameters( [
2210                         '4::oldmodel' => $oldModel,
2211                         '5::newmodel' => $newModel
2212                 ] );
2213                 $logid = $log->insert();
2214                 $log->publish( $logid );
2215         }
2216
2217         /**
2218          * Register the change of watch status
2219          */
2220         protected function updateWatchlist() {
2221                 $user = $this->context->getUser();
2222                 if ( !$user->isLoggedIn() ) {
2223                         return;
2224                 }
2225
2226                 $title = $this->mTitle;
2227                 $watch = $this->watchthis;
2228                 // Do this in its own transaction to reduce contention...
2229                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2230                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2231                                 return; // nothing to change
2232                         }
2233                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2234                 } );
2235         }
2236
2237         /**
2238          * Attempts to do 3-way merge of edit content with a base revision
2239          * and current content, in case of edit conflict, in whichever way appropriate
2240          * for the content type.
2241          *
2242          * @since 1.21
2243          *
2244          * @param Content $editContent
2245          *
2246          * @return bool
2247          */
2248         private function mergeChangesIntoContent( &$editContent ) {
2249                 $db = wfGetDB( DB_MASTER );
2250
2251                 // This is the revision the editor started from
2252                 $baseRevision = $this->getBaseRevision();
2253                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2254
2255                 if ( is_null( $baseContent ) ) {
2256                         return false;
2257                 }
2258
2259                 // The current state, we want to merge updates into it
2260                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2261                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2262
2263                 if ( is_null( $currentContent ) ) {
2264                         return false;
2265                 }
2266
2267                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2268
2269                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2270
2271                 if ( $result ) {
2272                         $editContent = $result;
2273                         // Update parentRevId to what we just merged.
2274                         $this->parentRevId = $currentRevision->getId();
2275                         return true;
2276                 }
2277
2278                 return false;
2279         }
2280
2281         /**
2282          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2283          *        one might think of X as the "base revision", which is NOT what this returns.
2284          * @return Revision Current version when the edit was started
2285          */
2286         public function getBaseRevision() {
2287                 if ( !$this->mBaseRevision ) {
2288                         $db = wfGetDB( DB_MASTER );
2289                         $this->mBaseRevision = $this->editRevId
2290                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2291                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2292                 }
2293                 return $this->mBaseRevision;
2294         }
2295
2296         /**
2297          * Check given input text against $wgSpamRegex, and return the text of the first match.
2298          *
2299          * @param string $text
2300          *
2301          * @return string|bool Matching string or false
2302          */
2303         public static function matchSpamRegex( $text ) {
2304                 global $wgSpamRegex;
2305                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2306                 $regexes = (array)$wgSpamRegex;
2307                 return self::matchSpamRegexInternal( $text, $regexes );
2308         }
2309
2310         /**
2311          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2312          *
2313          * @param string $text
2314          *
2315          * @return string|bool Matching string or false
2316          */
2317         public static function matchSummarySpamRegex( $text ) {
2318                 global $wgSummarySpamRegex;
2319                 $regexes = (array)$wgSummarySpamRegex;
2320                 return self::matchSpamRegexInternal( $text, $regexes );
2321         }
2322
2323         /**
2324          * @param string $text
2325          * @param array $regexes
2326          * @return bool|string
2327          */
2328         protected static function matchSpamRegexInternal( $text, $regexes ) {
2329                 foreach ( $regexes as $regex ) {
2330                         $matches = [];
2331                         if ( preg_match( $regex, $text, $matches ) ) {
2332                                 return $matches[0];
2333                         }
2334                 }
2335                 return false;
2336         }
2337
2338         public function setHeaders() {
2339                 global $wgAjaxEditStash;
2340
2341                 $out = $this->context->getOutput();
2342
2343                 $out->addModules( 'mediawiki.action.edit' );
2344                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2345
2346                 $user = $this->context->getUser();
2347                 if ( $user->getOption( 'showtoolbar' ) ) {
2348                         // The addition of default buttons is handled by getEditToolbar() which
2349                         // has its own dependency on this module. The call here ensures the module
2350                         // is loaded in time (it has position "top") for other modules to register
2351                         // buttons (e.g. extensions, gadgets, user scripts).
2352                         $out->addModules( 'mediawiki.toolbar' );
2353                 }
2354
2355                 if ( $user->getOption( 'uselivepreview' ) ) {
2356                         $out->addModules( 'mediawiki.action.edit.preview' );
2357                 }
2358
2359                 if ( $user->getOption( 'useeditwarning' ) ) {
2360                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2361                 }
2362
2363                 # Enabled article-related sidebar, toplinks, etc.
2364                 $out->setArticleRelated( true );
2365
2366                 $contextTitle = $this->getContextTitle();
2367                 if ( $this->isConflict ) {
2368                         $msg = 'editconflict';
2369                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2370                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2371                 } else {
2372                         $msg = $contextTitle->exists()
2373                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2374                                         && $contextTitle->getDefaultMessageText() !== false
2375                                 )
2376                                 ? 'editing'
2377                                 : 'creating';
2378                 }
2379
2380                 # Use the title defined by DISPLAYTITLE magic word when present
2381                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2382                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2383                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2384                 if ( $displayTitle === false ) {
2385                         $displayTitle = $contextTitle->getPrefixedText();
2386                 }
2387                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2388                 # Transmit the name of the message to JavaScript for live preview
2389                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2390                 $out->addJsConfigVars( [
2391                         'wgEditMessage' => $msg,
2392                         'wgAjaxEditStash' => $wgAjaxEditStash,
2393                 ] );
2394         }
2395
2396         /**
2397          * Show all applicable editing introductions
2398          */
2399         protected function showIntro() {
2400                 if ( $this->suppressIntro ) {
2401                         return;
2402                 }
2403
2404                 $out = $this->context->getOutput();
2405                 $namespace = $this->mTitle->getNamespace();
2406
2407                 if ( $namespace == NS_MEDIAWIKI ) {
2408                         # Show a warning if editing an interface message
2409                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2410                         # If this is a default message (but not css or js),
2411                         # show a hint that it is translatable on translatewiki.net
2412                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2413                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2414                         ) {
2415                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2416                                 if ( $defaultMessageText !== false ) {
2417                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2418                                                 'translateinterface' );
2419                                 }
2420                         }
2421                 } elseif ( $namespace == NS_FILE ) {
2422                         # Show a hint to shared repo
2423                         $file = wfFindFile( $this->mTitle );
2424                         if ( $file && !$file->isLocal() ) {
2425                                 $descUrl = $file->getDescriptionUrl();
2426                                 # there must be a description url to show a hint to shared repo
2427                                 if ( $descUrl ) {
2428                                         if ( !$this->mTitle->exists() ) {
2429                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2430                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2431                                                 ] );
2432                                         } else {
2433                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2434                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2435                                                 ] );
2436                                         }
2437                                 }
2438                         }
2439                 }
2440
2441                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2442                 # Show log extract when the user is currently blocked
2443                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2444                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2445                         $user = User::newFromName( $username, false /* allow IP users */ );
2446                         $ip = User::isIP( $username );
2447                         $block = Block::newFromTarget( $user, $user );
2448                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2449                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2450                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2451                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2452                                 # Show log extract if the user is currently blocked
2453                                 LogEventsList::showLogExtract(
2454                                         $out,
2455                                         'block',
2456                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2457                                         '',
2458                                         [
2459                                                 'lim' => 1,
2460                                                 'showIfEmpty' => false,
2461                                                 'msgKey' => [
2462                                                         'blocked-notice-logextract',
2463                                                         $user->getName() # Support GENDER in notice
2464                                                 ]
2465                                         ]
2466                                 );
2467                         }
2468                 }
2469                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2470                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2471                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2472                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2473                         ) );
2474                         if ( $this->context->getUser()->isLoggedIn() ) {
2475                                 $out->wrapWikiMsg(
2476                                         // Suppress the external link icon, consider the help url an internal one
2477                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2478                                         [
2479                                                 'newarticletext',
2480                                                 $helpLink
2481                                         ]
2482                                 );
2483                         } else {
2484                                 $out->wrapWikiMsg(
2485                                         // Suppress the external link icon, consider the help url an internal one
2486                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2487                                         [
2488                                                 'newarticletextanon',
2489                                                 $helpLink
2490                                         ]
2491                                 );
2492                         }
2493                 }
2494                 # Give a notice if the user is editing a deleted/moved page...
2495                 if ( !$this->mTitle->exists() ) {
2496                         $dbr = wfGetDB( DB_REPLICA );
2497
2498                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2499                                 '',
2500                                 [
2501                                         'lim' => 10,
2502                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2503                                         'showIfEmpty' => false,
2504                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2505                                 ]
2506                         );
2507                 }
2508         }
2509
2510         /**
2511          * Attempt to show a custom editing introduction, if supplied
2512          *
2513          * @return bool
2514          */
2515         protected function showCustomIntro() {
2516                 if ( $this->editintro ) {
2517                         $title = Title::newFromText( $this->editintro );
2518                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2519                                 // Added using template syntax, to take <noinclude>'s into account.
2520                                 $this->context->getOutput()->addWikiTextTitleTidy(
2521                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2522                                         $this->mTitle
2523                                 );
2524                                 return true;
2525                         }
2526                 }
2527                 return false;
2528         }
2529
2530         /**
2531          * Gets an editable textual representation of $content.
2532          * The textual representation can be turned by into a Content object by the
2533          * toEditContent() method.
2534          *
2535          * If $content is null or false or a string, $content is returned unchanged.
2536          *
2537          * If the given Content object is not of a type that can be edited using
2538          * the text base EditPage, an exception will be raised. Set
2539          * $this->allowNonTextContent to true to allow editing of non-textual
2540          * content.
2541          *
2542          * @param Content|null|bool|string $content
2543          * @return string The editable text form of the content.
2544          *
2545          * @throws MWException If $content is not an instance of TextContent and
2546          *   $this->allowNonTextContent is not true.
2547          */
2548         protected function toEditText( $content ) {
2549                 if ( $content === null || $content === false || is_string( $content ) ) {
2550                         return $content;
2551                 }
2552
2553                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2554                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2555                 }
2556
2557                 return $content->serialize( $this->contentFormat );
2558         }
2559
2560         /**
2561          * Turns the given text into a Content object by unserializing it.
2562          *
2563          * If the resulting Content object is not of a type that can be edited using
2564          * the text base EditPage, an exception will be raised. Set
2565          * $this->allowNonTextContent to true to allow editing of non-textual
2566          * content.
2567          *
2568          * @param string|null|bool $text Text to unserialize
2569          * @return Content|bool|null The content object created from $text. If $text was false
2570          *   or null, false resp. null will be  returned instead.
2571          *
2572          * @throws MWException If unserializing the text results in a Content
2573          *   object that is not an instance of TextContent and
2574          *   $this->allowNonTextContent is not true.
2575          */
2576         protected function toEditContent( $text ) {
2577                 if ( $text === false || $text === null ) {
2578                         return $text;
2579                 }
2580
2581                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2582                         $this->contentModel, $this->contentFormat );
2583
2584                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2585                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2586                 }
2587
2588                 return $content;
2589         }
2590
2591         /**
2592          * Send the edit form and related headers to OutputPage
2593          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2594          *     during form output near the top, for captchas and the like.
2595          *
2596          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2597          * use the EditPage::showEditForm:fields hook instead.
2598          */
2599         public function showEditForm( $formCallback = null ) {
2600                 # need to parse the preview early so that we know which templates are used,
2601                 # otherwise users with "show preview after edit box" will get a blank list
2602                 # we parse this near the beginning so that setHeaders can do the title
2603                 # setting work instead of leaving it in getPreviewText
2604                 $previewOutput = '';
2605                 if ( $this->formtype == 'preview' ) {
2606                         $previewOutput = $this->getPreviewText();
2607                 }
2608
2609                 $out = $this->context->getOutput();
2610
2611                 // Avoid PHP 7.1 warning of passing $this by reference
2612                 $editPage = $this;
2613                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2614
2615                 $this->setHeaders();
2616
2617                 $this->addTalkPageText();
2618                 $this->addEditNotices();
2619
2620                 if ( !$this->isConflict &&
2621                         $this->section != '' &&
2622                         !$this->isSectionEditSupported() ) {
2623                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2624                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2625                         // Someone is welcome to try refactoring though
2626                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2627                         return;
2628                 }
2629
2630                 $this->showHeader();
2631
2632                 $out->addHTML( $this->editFormPageTop );
2633
2634                 $user = $this->context->getUser();
2635                 if ( $user->getOption( 'previewontop' ) ) {
2636                         $this->displayPreviewArea( $previewOutput, true );
2637                 }
2638
2639                 $out->addHTML( $this->editFormTextTop );
2640
2641                 $showToolbar = true;
2642                 if ( $this->wasDeletedSinceLastEdit() ) {
2643                         if ( $this->formtype == 'save' ) {
2644                                 // Hide the toolbar and edit area, user can click preview to get it back
2645                                 // Add an confirmation checkbox and explanation.
2646                                 $showToolbar = false;
2647                         } else {
2648                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2649                                         'deletedwhileediting' );
2650                         }
2651                 }
2652
2653                 // @todo add EditForm plugin interface and use it here!
2654                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2655                 $out->addHTML( Html::openElement(
2656                         'form',
2657                         [
2658                                 'class' => 'mw-editform',
2659                                 'id' => self::EDITFORM_ID,
2660                                 'name' => self::EDITFORM_ID,
2661                                 'method' => 'post',
2662                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2663                                 'enctype' => 'multipart/form-data'
2664                         ]
2665                 ) );
2666
2667                 if ( is_callable( $formCallback ) ) {
2668                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2669                         call_user_func_array( $formCallback, [ &$out ] );
2670                 }
2671
2672                 // Add an empty field to trip up spambots
2673                 $out->addHTML(
2674                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2675                         . Html::rawElement(
2676                                 'label',
2677                                 [ 'for' => 'wpAntispam' ],
2678                                 $this->context->msg( 'simpleantispam-label' )->parse()
2679                         )
2680                         . Xml::element(
2681                                 'input',
2682                                 [
2683                                         'type' => 'text',
2684                                         'name' => 'wpAntispam',
2685                                         'id' => 'wpAntispam',
2686                                         'value' => ''
2687                                 ]
2688                         )
2689                         . Xml::closeElement( 'div' )
2690                 );
2691
2692                 // Avoid PHP 7.1 warning of passing $this by reference
2693                 $editPage = $this;
2694                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2695
2696                 // Put these up at the top to ensure they aren't lost on early form submission
2697                 $this->showFormBeforeText();
2698
2699                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2700                         $username = $this->lastDelete->user_name;
2701                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2702
2703                         // It is better to not parse the comment at all than to have templates expanded in the middle
2704                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2705                         $key = $comment === ''
2706                                 ? 'confirmrecreate-noreason'
2707                                 : 'confirmrecreate';
2708                         $out->addHTML(
2709                                 '<div class="mw-confirm-recreate">' .
2710                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2711                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2712                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2713                                 ) .
2714                                 '</div>'
2715                         );
2716                 }
2717
2718                 # When the summary is hidden, also hide them on preview/show changes
2719                 if ( $this->nosummary ) {
2720                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2721                 }
2722
2723                 # If a blank edit summary was previously provided, and the appropriate
2724                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2725                 # user being bounced back more than once in the event that a summary
2726                 # is not required.
2727                 # ####
2728                 # For a bit more sophisticated detection of blank summaries, hash the
2729                 # automatic one and pass that in the hidden field wpAutoSummary.
2730                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2731                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2732                 }
2733
2734                 if ( $this->undidRev ) {
2735                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2736                 }
2737
2738                 if ( $this->selfRedirect ) {
2739                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2740                 }
2741
2742                 if ( $this->hasPresetSummary ) {
2743                         // If a summary has been preset using &summary= we don't want to prompt for
2744                         // a different summary. Only prompt for a summary if the summary is blanked.
2745                         // (T19416)
2746                         $this->autoSumm = md5( '' );
2747                 }
2748
2749                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2750                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2751
2752                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2753                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2754
2755                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2756                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2757
2758                 $out->enableOOUI();
2759
2760                 if ( $this->section == 'new' ) {
2761                         $this->showSummaryInput( true, $this->summary );
2762                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2763                 }
2764
2765                 $out->addHTML( $this->editFormTextBeforeContent );
2766
2767                 if ( !$this->isCssJsSubpage && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2768                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2769                 }
2770
2771                 if ( $this->blankArticle ) {
2772                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2773                 }
2774
2775                 if ( $this->isConflict ) {
2776                         // In an edit conflict bypass the overridable content form method
2777                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2778                         // resolved between page source edits and custom ui edits using the
2779                         // custom edit ui.
2780                         $this->textbox2 = $this->textbox1;
2781
2782                         $content = $this->getCurrentContent();
2783                         $this->textbox1 = $this->toEditText( $content );
2784
2785                         $this->showTextbox1();
2786                 } else {
2787                         $this->showContentForm();
2788                 }
2789
2790                 $out->addHTML( $this->editFormTextAfterContent );
2791
2792                 $this->showStandardInputs();
2793
2794                 $this->showFormAfterText();
2795
2796                 $this->showTosSummary();
2797
2798                 $this->showEditTools();
2799
2800                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2801
2802                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2803
2804                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2805                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2806
2807                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2808                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2809
2810                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2811
2812                 if ( $this->isConflict ) {
2813                         try {
2814                                 $this->showConflict();
2815                         } catch ( MWContentSerializationException $ex ) {
2816                                 // this can't really happen, but be nice if it does.
2817                                 $msg = $this->context->msg(
2818                                         'content-failed-to-parse',
2819                                         $this->contentModel,
2820                                         $this->contentFormat,
2821                                         $ex->getMessage()
2822                                 );
2823                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2824                         }
2825                 }
2826
2827                 // Set a hidden field so JS knows what edit form mode we are in
2828                 if ( $this->isConflict ) {
2829                         $mode = 'conflict';
2830                 } elseif ( $this->preview ) {
2831                         $mode = 'preview';
2832                 } elseif ( $this->diff ) {
2833                         $mode = 'diff';
2834                 } else {
2835                         $mode = 'text';
2836                 }
2837                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2838
2839                 // Marker for detecting truncated form data.  This must be the last
2840                 // parameter sent in order to be of use, so do not move me.
2841                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2842                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2843
2844                 if ( !$user->getOption( 'previewontop' ) ) {
2845                         $this->displayPreviewArea( $previewOutput, false );
2846                 }
2847         }
2848
2849         /**
2850          * Wrapper around TemplatesOnThisPageFormatter to make
2851          * a "templates on this page" list.
2852          *
2853          * @param Title[] $templates
2854          * @return string HTML
2855          */
2856         public function makeTemplatesOnThisPageList( array $templates ) {
2857                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2858                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2859                 );
2860
2861                 // preview if preview, else section if section, else false
2862                 $type = false;
2863                 if ( $this->preview ) {
2864                         $type = 'preview';
2865                 } elseif ( $this->section != '' ) {
2866                         $type = 'section';
2867                 }
2868
2869                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2870                         $templateListFormatter->format( $templates, $type )
2871                 );
2872         }
2873
2874         /**
2875          * Extract the section title from current section text, if any.
2876          *
2877          * @param string $text
2878          * @return string|bool String or false
2879          */
2880         public static function extractSectionTitle( $text ) {
2881                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2882                 if ( !empty( $matches[2] ) ) {
2883                         global $wgParser;
2884                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2885                 } else {
2886                         return false;
2887                 }
2888         }
2889
2890         protected function showHeader() {
2891                 global $wgAllowUserCss, $wgAllowUserJs;
2892
2893                 $out = $this->context->getOutput();
2894                 $user = $this->context->getUser();
2895                 if ( $this->isConflict ) {
2896                         $this->addExplainConflictHeader( $out );
2897                         $this->editRevId = $this->page->getLatest();
2898                 } else {
2899                         if ( $this->section != '' && $this->section != 'new' ) {
2900                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2901                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2902                                         if ( $sectionTitle !== false ) {
2903                                                 $this->summary = "/* $sectionTitle */ ";
2904                                         }
2905                                 }
2906                         }
2907
2908                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
2909
2910                         if ( $this->missingComment ) {
2911                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2912                         }
2913
2914                         if ( $this->missingSummary && $this->section != 'new' ) {
2915                                 $out->wrapWikiMsg(
2916                                         "<div id='mw-missingsummary'>\n$1\n</div>",
2917                                         [ 'missingsummary', $buttonLabel ]
2918                                 );
2919                         }
2920
2921                         if ( $this->missingSummary && $this->section == 'new' ) {
2922                                 $out->wrapWikiMsg(
2923                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
2924                                         [ 'missingcommentheader', $buttonLabel ]
2925                                 );
2926                         }
2927
2928                         if ( $this->blankArticle ) {
2929                                 $out->wrapWikiMsg(
2930                                         "<div id='mw-blankarticle'>\n$1\n</div>",
2931                                         [ 'blankarticle', $buttonLabel ]
2932                                 );
2933                         }
2934
2935                         if ( $this->selfRedirect ) {
2936                                 $out->wrapWikiMsg(
2937                                         "<div id='mw-selfredirect'>\n$1\n</div>",
2938                                         [ 'selfredirect', $buttonLabel ]
2939                                 );
2940                         }
2941
2942                         if ( $this->hookError !== '' ) {
2943                                 $out->addWikiText( $this->hookError );
2944                         }
2945
2946                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2947                                 $out->addWikiMsg( 'nonunicodebrowser' );
2948                         }
2949
2950                         if ( $this->section != 'new' ) {
2951                                 $revision = $this->mArticle->getRevisionFetched();
2952                                 if ( $revision ) {
2953                                         // Let sysop know that this will make private content public if saved
2954
2955                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
2956                                                 $out->wrapWikiMsg(
2957                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2958                                                         'rev-deleted-text-permission'
2959                                                 );
2960                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2961                                                 $out->wrapWikiMsg(
2962                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2963                                                         'rev-deleted-text-view'
2964                                                 );
2965                                         }
2966
2967                                         if ( !$revision->isCurrent() ) {
2968                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2969                                                 $out->addWikiMsg( 'editingold' );
2970                                                 $this->isOldRev = true;
2971                                         }
2972                                 } elseif ( $this->mTitle->exists() ) {
2973                                         // Something went wrong
2974
2975                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2976                                                 [ 'missing-revision', $this->oldid ] );
2977                                 }
2978                         }
2979                 }
2980
2981                 if ( wfReadOnly() ) {
2982                         $out->wrapWikiMsg(
2983                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2984                                 [ 'readonlywarning', wfReadOnlyReason() ]
2985                         );
2986                 } elseif ( $user->isAnon() ) {
2987                         if ( $this->formtype != 'preview' ) {
2988                                 $out->wrapWikiMsg(
2989                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2990                                         [ 'anoneditwarning',
2991                                                 // Log-in link
2992                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2993                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2994                                                 ] ),
2995                                                 // Sign-up link
2996                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2997                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2998                                                 ] )
2999                                         ]
3000                                 );
3001                         } else {
3002                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3003                                         'anonpreviewwarning'
3004                                 );
3005                         }
3006                 } else {
3007                         if ( $this->isCssJsSubpage ) {
3008                                 # Check the skin exists
3009                                 if ( $this->isWrongCaseCssJsPage ) {
3010                                         $out->wrapWikiMsg(
3011                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3012                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3013                                         );
3014                                 }
3015                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3016                                         $out->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3017                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3018                                         );
3019                                         if ( $this->formtype !== 'preview' ) {
3020                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3021                                                         $out->wrapWikiMsg(
3022                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3023                                                                 [ 'usercssyoucanpreview' ]
3024                                                         );
3025                                                 }
3026
3027                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3028                                                         $out->wrapWikiMsg(
3029                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3030                                                                 [ 'userjsyoucanpreview' ]
3031                                                         );
3032                                                 }
3033                                         }
3034                                 }
3035                         }
3036                 }
3037
3038                 $this->addPageProtectionWarningHeaders();
3039
3040                 $this->addLongPageWarningHeader();
3041
3042                 # Add header copyright warning
3043                 $this->showHeaderCopyrightWarning();
3044         }
3045
3046         /**
3047          * Helper function for summary input functions, which returns the neccessary
3048          * attributes for the input.
3049          *
3050          * @param array|null $inputAttrs Array of attrs to use on the input
3051          * @return array
3052          */
3053         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3054                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3055                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3056                         'id' => 'wpSummary',
3057                         'name' => 'wpSummary',
3058                         'maxlength' => '200',
3059                         'tabindex' => 1,
3060                         'size' => 60,
3061                         'spellcheck' => 'true',
3062                 ];
3063         }
3064
3065         /**
3066          * Standard summary input and label (wgSummary), abstracted so EditPage
3067          * subclasses may reorganize the form.
3068          * Note that you do not need to worry about the label's for=, it will be
3069          * inferred by the id given to the input. You can remove them both by
3070          * passing [ 'id' => false ] to $userInputAttrs.
3071          *
3072          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3073          * @param string $summary The value of the summary input
3074          * @param string $labelText The html to place inside the label
3075          * @param array $inputAttrs Array of attrs to use on the input
3076          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3077          * @return array An array in the format [ $label, $input ]
3078          */
3079         public function getSummaryInput( $summary = "", $labelText = null,
3080                 $inputAttrs = null, $spanLabelAttrs = null
3081         ) {
3082                 wfDeprecated( __METHOD__, '1.30' );
3083                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3084                 $inputAttrs += Linker::tooltipAndAccesskeyAttribs( 'summary' );
3085
3086                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3087                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3088                         'id' => "wpSummaryLabel"
3089                 ];
3090
3091                 $label = null;
3092                 if ( $labelText ) {
3093                         $label = Xml::tags(
3094                                 'label',
3095                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3096                                 $labelText
3097                         );
3098                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3099                 }
3100
3101                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3102
3103                 return [ $label, $input ];
3104         }
3105
3106         /**
3107          * Builds a standard summary input with a label.
3108          *
3109          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3110          * @param string $summary The value of the summary input
3111          * @param string $labelText The html to place inside the label
3112          * @param array $inputAttrs Array of attrs to use on the input
3113          *
3114          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3115          */
3116         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3117                 wfDeprecated( __METHOD__, '1.30' );
3118                 $this->getSummaryInputWidget( $summary, $labelText, $inputAttrs );
3119         }
3120
3121         /**
3122          * Builds a standard summary input with a label.
3123          *
3124          * @param string $summary The value of the summary input
3125          * @param string $labelText The html to place inside the label
3126          * @param array $inputAttrs Array of attrs to use on the input
3127          *
3128          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3129          */
3130         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3131                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3132                         $this->getSummaryInputAttributes( $inputAttrs )
3133                 );
3134                 $inputAttrs += [
3135                         'title' => Linker::titleAttrib( 'summary' ),
3136                         'accessKey' => Linker::accesskey( 'summary' ),
3137                 ];
3138
3139                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3140                 $inputAttrs['inputId'] = $inputAttrs['id'];
3141                 $inputAttrs['id'] = 'wpSummaryWidget';
3142
3143                 return new OOUI\FieldLayout(
3144                         new OOUI\TextInputWidget( [
3145                                 'value' => $summary,
3146                                 'infusable' => true,
3147                         ] + $inputAttrs ),
3148                         [
3149                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3150                                 'align' => 'top',
3151                                 'id' => 'wpSummaryLabel',
3152                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3153                         ]
3154                 );
3155         }
3156
3157         /**
3158          * @param bool $isSubjectPreview True if this is the section subject/title
3159          *   up top, or false if this is the comment summary
3160          *   down below the textarea
3161          * @param string $summary The text of the summary to display
3162          */
3163         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3164                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3165                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3166                 if ( $isSubjectPreview ) {
3167                         if ( $this->nosummary ) {
3168                                 return;
3169                         }
3170                 } else {
3171                         if ( !$this->mShowSummaryField ) {
3172                                 return;
3173                         }
3174                 }
3175
3176                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3177                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3178                                 $summary,
3179                                 $labelText,
3180                                 [ 'class' => $summaryClass ]
3181                         ) );
3182         }
3183
3184         /**
3185          * @param bool $isSubjectPreview True if this is the section subject/title
3186          *   up top, or false if this is the comment summary
3187          *   down below the textarea
3188          * @param string $summary The text of the summary to display
3189          * @return string
3190          */
3191         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3192                 // avoid spaces in preview, gets always trimmed on save
3193                 $summary = trim( $summary );
3194                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3195                         return "";
3196                 }
3197
3198                 global $wgParser;
3199
3200                 if ( $isSubjectPreview ) {
3201                         $summary = $this->context->msg( 'newsectionsummary' )
3202                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3203                                 ->inContentLanguage()->text();
3204                 }
3205
3206                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3207
3208                 $summary = $this->context->msg( $message )->parse()
3209                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3210                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3211         }
3212
3213         protected function showFormBeforeText() {
3214                 $out = $this->context->getOutput();
3215                 $out->addHTML( Html::hidden( 'wpSection', htmlspecialchars( $this->section ) ) );
3216                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3217                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3218                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3219                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3220
3221                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3222                         $out->addHTML( Html::hidden( 'safemode', '1' ) );
3223                 }
3224         }
3225
3226         protected function showFormAfterText() {
3227                 /**
3228                  * To make it harder for someone to slip a user a page
3229                  * which submits an edit form to the wiki without their
3230                  * knowledge, a random token is associated with the login
3231                  * session. If it's not passed back with the submission,
3232                  * we won't save the page, or render user JavaScript and
3233                  * CSS previews.
3234                  *
3235                  * For anon editors, who may not have a session, we just
3236                  * include the constant suffix to prevent editing from
3237                  * broken text-mangling proxies.
3238                  */
3239                 $this->context->getOutput()->addHTML(
3240                         "\n" .
3241                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3242                         "\n"
3243                 );
3244         }
3245
3246         /**
3247          * Subpage overridable method for printing the form for page content editing
3248          * By default this simply outputs wpTextbox1
3249          * Subclasses can override this to provide a custom UI for editing;
3250          * be it a form, or simply wpTextbox1 with a modified content that will be
3251          * reverse modified when extracted from the post data.
3252          * Note that this is basically the inverse for importContentFormData
3253          */
3254         protected function showContentForm() {
3255                 $this->showTextbox1();
3256         }
3257
3258         /**
3259          * Method to output wpTextbox1
3260          * The $textoverride method can be used by subclasses overriding showContentForm
3261          * to pass back to this method.
3262          *
3263          * @param array $customAttribs Array of html attributes to use in the textarea
3264          * @param string $textoverride Optional text to override $this->textarea1 with
3265          */
3266         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3267                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3268                         $attribs = [ 'style' => 'display:none;' ];
3269                 } else {
3270                         $classes = []; // Textarea CSS
3271                         if ( $this->mTitle->isProtected( 'edit' ) &&
3272                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3273                         ) {
3274                                 # Is the title semi-protected?
3275                                 if ( $this->mTitle->isSemiProtected() ) {
3276                                         $classes[] = 'mw-textarea-sprotected';
3277                                 } else {
3278                                         # Then it must be protected based on static groups (regular)
3279                                         $classes[] = 'mw-textarea-protected';
3280                                 }
3281                                 # Is the title cascade-protected?
3282                                 if ( $this->mTitle->isCascadeProtected() ) {
3283                                         $classes[] = 'mw-textarea-cprotected';
3284                                 }
3285                         }
3286                         # Is an old revision being edited?
3287                         if ( $this->isOldRev ) {
3288                                 $classes[] = 'mw-textarea-oldrev';
3289                         }
3290
3291                         $attribs = [ 'tabindex' => 1 ];
3292
3293                         if ( is_array( $customAttribs ) ) {
3294                                 $attribs += $customAttribs;
3295                         }
3296
3297                         if ( count( $classes ) ) {
3298                                 if ( isset( $attribs['class'] ) ) {
3299                                         $classes[] = $attribs['class'];
3300                                 }
3301                                 $attribs['class'] = implode( ' ', $classes );
3302                         }
3303                 }
3304
3305                 $this->showTextbox(
3306                         $textoverride !== null ? $textoverride : $this->textbox1,
3307                         'wpTextbox1',
3308                         $attribs
3309                 );
3310         }
3311
3312         protected function showTextbox2() {
3313                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3314         }
3315
3316         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3317                 $wikitext = $this->safeUnicodeOutput( $text );
3318                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3319
3320                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $this->context->getUser() );
3321
3322                 $this->context->getOutput()->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3323         }
3324
3325         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3326                 $classes = [];
3327                 if ( $isOnTop ) {
3328                         $classes[] = 'ontop';
3329                 }
3330
3331                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3332
3333                 if ( $this->formtype != 'preview' ) {
3334                         $attribs['style'] = 'display: none;';
3335                 }
3336
3337                 $out = $this->context->getOutput();
3338                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3339
3340                 if ( $this->formtype == 'preview' ) {
3341                         $this->showPreview( $previewOutput );
3342                 } else {
3343                         // Empty content container for LivePreview
3344                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3345                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3346                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3347                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3348                 }
3349
3350                 $out->addHTML( '</div>' );
3351
3352                 if ( $this->formtype == 'diff' ) {
3353                         try {
3354                                 $this->showDiff();
3355                         } catch ( MWContentSerializationException $ex ) {
3356                                 $msg = $this->context->msg(
3357                                         'content-failed-to-parse',
3358                                         $this->contentModel,
3359                                         $this->contentFormat,
3360                                         $ex->getMessage()
3361                                 );
3362                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3363                         }
3364                 }
3365         }
3366
3367         /**
3368          * Append preview output to OutputPage.
3369          * Includes category rendering if this is a category page.
3370          *
3371          * @param string $text The HTML to be output for the preview.
3372          */
3373         protected function showPreview( $text ) {
3374                 if ( $this->mArticle instanceof CategoryPage ) {
3375                         $this->mArticle->openShowCategory();
3376                 }
3377                 # This hook seems slightly odd here, but makes things more
3378                 # consistent for extensions.
3379                 $out = $this->context->getOutput();
3380                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3381                 $out->addHTML( $text );
3382                 if ( $this->mArticle instanceof CategoryPage ) {
3383                         $this->mArticle->closeShowCategory();
3384                 }
3385         }
3386
3387         /**
3388          * Get a diff between the current contents of the edit box and the
3389          * version of the page we're editing from.
3390          *
3391          * If this is a section edit, we'll replace the section as for final
3392          * save and then make a comparison.
3393          */
3394         public function showDiff() {
3395                 global $wgContLang;
3396
3397                 $oldtitlemsg = 'currentrev';
3398                 # if message does not exist, show diff against the preloaded default
3399                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3400                         $oldtext = $this->mTitle->getDefaultMessageText();
3401                         if ( $oldtext !== false ) {
3402                                 $oldtitlemsg = 'defaultmessagetext';
3403                                 $oldContent = $this->toEditContent( $oldtext );
3404                         } else {
3405                                 $oldContent = null;
3406                         }
3407                 } else {
3408                         $oldContent = $this->getCurrentContent();
3409                 }
3410
3411                 $textboxContent = $this->toEditContent( $this->textbox1 );
3412                 if ( $this->editRevId !== null ) {
3413                         $newContent = $this->page->replaceSectionAtRev(
3414                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3415                         );
3416                 } else {
3417                         $newContent = $this->page->replaceSectionContent(
3418                                 $this->section, $textboxContent, $this->summary, $this->edittime
3419                         );
3420                 }
3421
3422                 if ( $newContent ) {
3423                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3424
3425                         $user = $this->context->getUser();
3426                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
3427                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3428                 }
3429
3430                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3431                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3432                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3433
3434                         if ( !$oldContent ) {
3435                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3436                         }
3437
3438                         if ( !$newContent ) {
3439                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3440                         }
3441
3442                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3443                         $de->setContent( $oldContent, $newContent );
3444
3445                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3446                         $de->showDiffStyle();
3447                 } else {
3448                         $difftext = '';
3449                 }
3450
3451                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3452         }
3453
3454         /**
3455          * Show the header copyright warning.
3456          */
3457         protected function showHeaderCopyrightWarning() {
3458                 $msg = 'editpage-head-copy-warn';
3459                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3460                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3461                                 'editpage-head-copy-warn' );
3462                 }
3463         }
3464
3465         /**
3466          * Give a chance for site and per-namespace customizations of
3467          * terms of service summary link that might exist separately
3468          * from the copyright notice.
3469          *
3470          * This will display between the save button and the edit tools,
3471          * so should remain short!
3472          */
3473         protected function showTosSummary() {
3474                 $msg = 'editpage-tos-summary';
3475                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3476                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3477                         $out = $this->context->getOutput();
3478                         $out->addHTML( '<div class="mw-tos-summary">' );
3479                         $out->addWikiMsg( $msg );
3480                         $out->addHTML( '</div>' );
3481                 }
3482         }
3483
3484         /**
3485          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3486          * characters not present on most keyboards for copying/pasting.
3487          */
3488         protected function showEditTools() {
3489                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3490                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3491                         '</div>' );
3492         }
3493
3494         /**
3495          * Get the copyright warning
3496          *
3497          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3498          * @return string
3499          */
3500         protected function getCopywarn() {
3501                 return self::getCopyrightWarning( $this->mTitle );
3502         }
3503
3504         /**
3505          * Get the copyright warning, by default returns wikitext
3506          *
3507          * @param Title $title
3508          * @param string $format Output format, valid values are any function of a Message object
3509          * @param Language|string|null $langcode Language code or Language object.
3510          * @return string
3511          */
3512         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3513                 global $wgRightsText;
3514                 if ( $wgRightsText ) {
3515                         $copywarnMsg = [ 'copyrightwarning',
3516                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3517                                 $wgRightsText ];
3518                 } else {
3519                         $copywarnMsg = [ 'copyrightwarning2',
3520                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3521                 }
3522                 // Allow for site and per-namespace customization of contribution/copyright notice.
3523                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3524
3525                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3526                 if ( $langcode ) {
3527                         $msg->inLanguage( $langcode );
3528                 }
3529                 return "<div id=\"editpage-copywarn\">\n" .
3530                         $msg->$format() . "\n</div>";
3531         }
3532
3533         /**
3534          * Get the Limit report for page previews
3535          *
3536          * @since 1.22
3537          * @param ParserOutput $output ParserOutput object from the parse
3538          * @return string HTML
3539          */
3540         public static function getPreviewLimitReport( $output ) {
3541                 if ( !$output || !$output->getLimitReportData() ) {
3542                         return '';
3543                 }
3544
3545                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3546                         wfMessage( 'limitreport-title' )->parseAsBlock()
3547                 );
3548
3549                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3550                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3551
3552                 $limitReport .= Html::openElement( 'table', [
3553                         'class' => 'preview-limit-report wikitable'
3554                 ] ) .
3555                         Html::openElement( 'tbody' );
3556
3557                 foreach ( $output->getLimitReportData() as $key => $value ) {
3558                         if ( Hooks::run( 'ParserLimitReportFormat',
3559                                 [ $key, &$value, &$limitReport, true, true ]
3560                         ) ) {
3561                                 $keyMsg = wfMessage( $key );
3562                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3563                                 if ( !$valueMsg->exists() ) {
3564                                         $valueMsg = new RawMessage( '$1' );
3565                                 }
3566                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3567                                         $limitReport .= Html::openElement( 'tr' ) .
3568                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3569                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3570                                                 Html::closeElement( 'tr' );
3571                                 }
3572                         }
3573                 }
3574
3575                 $limitReport .= Html::closeElement( 'tbody' ) .
3576                         Html::closeElement( 'table' ) .
3577                         Html::closeElement( 'div' );
3578
3579                 return $limitReport;
3580         }
3581
3582         protected function showStandardInputs( &$tabindex = 2 ) {
3583                 $out = $this->context->getOutput();
3584                 $out->addHTML( "<div class='editOptions'>\n" );
3585
3586                 if ( $this->section != 'new' ) {
3587                         $this->showSummaryInput( false, $this->summary );
3588                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3589                 }
3590
3591                 $checkboxes = $this->getCheckboxesWidget(
3592                         $tabindex,
3593                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3594                 );
3595                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3596
3597                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3598
3599                 // Show copyright warning.
3600                 $out->addWikiText( $this->getCopywarn() );
3601                 $out->addHTML( $this->editFormTextAfterWarn );
3602
3603                 $out->addHTML( "<div class='editButtons'>\n" );
3604                 $out->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3605
3606                 $cancel = $this->getCancelLink();
3607                 if ( $cancel !== '' ) {
3608                         $cancel .= Html::element( 'span',
3609                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3610                                 $this->context->msg( 'pipe-separator' )->text() );
3611                 }
3612
3613                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3614                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3615                 $edithelp =
3616                         Html::linkButton(
3617                                 $this->context->msg( 'edithelp' )->text(),
3618                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3619                                 [ 'mw-ui-quiet' ]
3620                         ) .
3621                         $this->context->msg( 'word-separator' )->escaped() .
3622                         $this->context->msg( 'newwindow' )->parse();
3623
3624                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3625                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3626                 $out->addHTML( "</div><!-- editButtons -->\n" );
3627
3628                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3629
3630                 $out->addHTML( "</div><!-- editOptions -->\n" );
3631         }
3632
3633         /**
3634          * Show an edit conflict. textbox1 is already shown in showEditForm().
3635          * If you want to use another entry point to this function, be careful.
3636          */
3637         protected function showConflict() {
3638                 $out = $this->context->getOutput();
3639                 // Avoid PHP 7.1 warning of passing $this by reference
3640                 $editPage = $this;
3641                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3642                         $this->incrementConflictStats();
3643
3644                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3645
3646                         $content1 = $this->toEditContent( $this->textbox1 );
3647                         $content2 = $this->toEditContent( $this->textbox2 );
3648
3649                         $handler = ContentHandler::getForModelID( $this->contentModel );
3650                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3651                         $de->setContent( $content2, $content1 );
3652                         $de->showDiff(
3653                                 $this->context->msg( 'yourtext' )->parse(),
3654                                 $this->context->msg( 'storedversion' )->text()
3655                         );
3656
3657                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3658                         $this->showTextbox2();
3659                 }
3660         }
3661
3662         protected function incrementConflictStats() {
3663                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3664                 $stats->increment( 'edit.failures.conflict' );
3665                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3666                 if (
3667                         $this->mTitle->getNamespace() >= NS_MAIN &&
3668                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3669                 ) {
3670                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3671                 }
3672         }
3673
3674         /**
3675          * @return string
3676          */
3677         public function getCancelLink() {
3678                 $cancelParams = [];
3679                 if ( !$this->isConflict && $this->oldid > 0 ) {
3680                         $cancelParams['oldid'] = $this->oldid;
3681                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3682                         $cancelParams['redirect'] = 'no';
3683                 }
3684
3685                 return new OOUI\ButtonWidget( [
3686                         'id' => 'mw-editform-cancel',
3687                         'href' => $this->getContextTitle()->getLinkUrl( $cancelParams ),
3688                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3689                         'framed' => false,
3690                         'infusable' => true,
3691                         'flags' => 'destructive',
3692                 ] );
3693         }
3694
3695         /**
3696          * Returns the URL to use in the form's action attribute.
3697          * This is used by EditPage subclasses when simply customizing the action
3698          * variable in the constructor is not enough. This can be used when the
3699          * EditPage lives inside of a Special page rather than a custom page action.
3700          *
3701          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3702          * @return string
3703          */
3704         protected function getActionURL( Title $title ) {
3705                 return $title->getLocalURL( [ 'action' => $this->action ] );
3706         }
3707
3708         /**
3709          * Check if a page was deleted while the user was editing it, before submit.
3710          * Note that we rely on the logging table, which hasn't been always there,
3711          * but that doesn't matter, because this only applies to brand new
3712          * deletes.
3713          * @return bool
3714          */
3715         protected function wasDeletedSinceLastEdit() {
3716                 if ( $this->deletedSinceEdit !== null ) {
3717                         return $this->deletedSinceEdit;
3718                 }
3719
3720                 $this->deletedSinceEdit = false;
3721
3722                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3723                         $this->lastDelete = $this->getLastDelete();
3724                         if ( $this->lastDelete ) {
3725                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3726                                 if ( $deleteTime > $this->starttime ) {
3727                                         $this->deletedSinceEdit = true;
3728                                 }
3729                         }
3730                 }
3731
3732                 return $this->deletedSinceEdit;
3733         }
3734
3735         /**
3736          * @return bool|stdClass
3737          */
3738         protected function getLastDelete() {
3739                 $dbr = wfGetDB( DB_REPLICA );
3740                 $commentQuery = CommentStore::newKey( 'log_comment' )->getJoin();
3741                 $data = $dbr->selectRow(
3742                         [ 'logging', 'user' ] + $commentQuery['tables'],
3743                         [
3744                                 'log_type',
3745                                 'log_action',
3746                                 'log_timestamp',
3747                                 'log_user',
3748                                 'log_namespace',
3749                                 'log_title',
3750                                 'log_params',
3751                                 'log_deleted',
3752                                 'user_name'
3753                         ] + $commentQuery['fields'], [
3754                                 'log_namespace' => $this->mTitle->getNamespace(),
3755                                 'log_title' => $this->mTitle->getDBkey(),
3756                                 'log_type' => 'delete',
3757                                 'log_action' => 'delete',
3758                                 'user_id=log_user'
3759                         ],
3760                         __METHOD__,
3761                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3762                         [
3763                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3764                         ] + $commentQuery['joins']
3765                 );
3766                 // Quick paranoid permission checks...
3767                 if ( is_object( $data ) ) {
3768                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3769                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3770                         }
3771
3772                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3773                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3774                                 $data->log_comment_data = null;
3775                         }
3776                 }
3777
3778                 return $data;
3779         }
3780
3781         /**
3782          * Get the rendered text for previewing.
3783          * @throws MWException
3784          * @return string
3785          */
3786         public function getPreviewText() {
3787                 global $wgRawHtml;
3788                 global $wgAllowUserCss, $wgAllowUserJs;
3789
3790                 $out = $this->context->getOutput();
3791
3792                 if ( $wgRawHtml && !$this->mTokenOk ) {
3793                         // Could be an offsite preview attempt. This is very unsafe if
3794                         // HTML is enabled, as it could be an attack.
3795                         $parsedNote = '';
3796                         if ( $this->textbox1 !== '' ) {
3797                                 // Do not put big scary notice, if previewing the empty
3798                                 // string, which happens when you initially edit
3799                                 // a category page, due to automatic preview-on-open.
3800                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3801                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3802                                         true, /* interface */true );
3803                         }
3804                         $this->incrementEditFailureStats( 'session_loss' );
3805                         return $parsedNote;
3806                 }
3807
3808                 $note = '';
3809
3810                 try {
3811                         $content = $this->toEditContent( $this->textbox1 );
3812
3813                         $previewHTML = '';
3814                         if ( !Hooks::run(
3815                                 'AlternateEditPreview',
3816                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3817                         ) {
3818                                 return $previewHTML;
3819                         }
3820
3821                         # provide a anchor link to the editform
3822                         $continueEditing = '<span class="mw-continue-editing">' .
3823                                 '[[#' . self::EDITFORM_ID . '|' .
3824                                 $this->context->getLanguage()->getArrow() . ' ' .
3825                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3826                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3827                                 if ( $this->mTokenOkExceptSuffix ) {
3828                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3829                                         $this->incrementEditFailureStats( 'bad_token' );
3830                                 } else {
3831                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3832                                         $this->incrementEditFailureStats( 'session_loss' );
3833                                 }
3834                         } elseif ( $this->incompleteForm ) {
3835                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3836                                 if ( $this->mTriedSave ) {
3837                                         $this->incrementEditFailureStats( 'incomplete_form' );
3838                                 }
3839                         } else {
3840                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3841                         }
3842
3843                         # don't parse non-wikitext pages, show message about preview
3844                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3845                                 if ( $this->mTitle->isCssJsSubpage() ) {
3846                                         $level = 'user';
3847                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3848                                         $level = 'site';
3849                                 } else {
3850                                         $level = false;
3851                                 }
3852
3853                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3854                                         $format = 'css';
3855                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3856                                                 $format = false;
3857                                         }
3858                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3859                                         $format = 'js';
3860                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3861                                                 $format = false;
3862                                         }
3863                                 } else {
3864                                         $format = false;
3865                                 }
3866
3867                                 # Used messages to make sure grep find them:
3868                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3869                                 if ( $level && $format ) {
3870                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3871                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3872                                                 ' ' . $continueEditing . "</div>";
3873                                 }
3874                         }
3875
3876                         # If we're adding a comment, we need to show the
3877                         # summary as the headline
3878                         if ( $this->section === "new" && $this->summary !== "" ) {
3879                                 $content = $content->addSectionHeader( $this->summary );
3880                         }
3881
3882                         $hook_args = [ $this, &$content ];
3883                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3884
3885                         $parserResult = $this->doPreviewParse( $content );
3886                         $parserOutput = $parserResult['parserOutput'];
3887                         $previewHTML = $parserResult['html'];
3888                         $this->mParserOutput = $parserOutput;
3889                         $out->addParserOutputMetadata( $parserOutput );
3890
3891                         if ( count( $parserOutput->getWarnings() ) ) {
3892                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3893                         }
3894
3895                 } catch ( MWContentSerializationException $ex ) {
3896                         $m = $this->context->msg(
3897                                 'content-failed-to-parse',
3898                                 $this->contentModel,
3899                                 $this->contentFormat,
3900                                 $ex->getMessage()
3901                         );
3902                         $note .= "\n\n" . $m->parse();
3903                         $previewHTML = '';
3904                 }
3905
3906                 if ( $this->isConflict ) {
3907                         $conflict = '<h2 id="mw-previewconflict">'
3908                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3909                 } else {
3910                         $conflict = '<hr />';
3911                 }
3912
3913                 $previewhead = "<div class='previewnote'>\n" .
3914                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3915                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3916
3917                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3918                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3919                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3920                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3921
3922                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3923         }
3924
3925         private function incrementEditFailureStats( $failureType ) {
3926                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3927                 $stats->increment( 'edit.failures.' . $failureType );
3928         }
3929
3930         /**
3931          * Get parser options for a preview
3932          * @return ParserOptions
3933          */
3934         protected function getPreviewParserOptions() {
3935                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3936                 $parserOptions->setIsPreview( true );
3937                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3938                 $parserOptions->enableLimitReport();
3939                 return $parserOptions;
3940         }
3941
3942         /**
3943          * Parse the page for a preview. Subclasses may override this class, in order
3944          * to parse with different options, or to otherwise modify the preview HTML.
3945          *
3946          * @param Content $content The page content
3947          * @return array with keys:
3948          *   - parserOutput: The ParserOutput object
3949          *   - html: The HTML to be displayed
3950          */
3951         protected function doPreviewParse( Content $content ) {
3952                 $user = $this->context->getUser();
3953                 $parserOptions = $this->getPreviewParserOptions();
3954                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
3955                 $scopedCallback = $parserOptions->setupFakeRevision(
3956                         $this->mTitle, $pstContent, $user );
3957                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3958                 ScopedCallback::consume( $scopedCallback );
3959                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3960                 return [
3961                         'parserOutput' => $parserOutput,
3962                         'html' => $parserOutput->getText() ];
3963         }
3964
3965         /**
3966          * @return array
3967          */
3968         public function getTemplates() {
3969                 if ( $this->preview || $this->section != '' ) {
3970                         $templates = [];
3971                         if ( !isset( $this->mParserOutput ) ) {
3972                                 return $templates;
3973                         }
3974                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3975                                 foreach ( array_keys( $template ) as $dbk ) {
3976                                         $templates[] = Title::makeTitle( $ns, $dbk );
3977                                 }
3978                         }
3979                         return $templates;
3980                 } else {
3981                         return $this->mTitle->getTemplateLinksFrom();
3982                 }
3983         }
3984
3985         /**
3986          * Shows a bulletin board style toolbar for common editing functions.
3987          * It can be disabled in the user preferences.
3988          *
3989          * @param Title $title Title object for the page being edited (optional)
3990          * @return string
3991          */
3992         public static function getEditToolbar( $title = null ) {
3993                 global $wgContLang, $wgOut;
3994                 global $wgEnableUploads, $wgForeignFileRepos;
3995
3996                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3997                 $showSignature = true;
3998                 if ( $title ) {
3999                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4000                 }
4001
4002                 /**
4003                  * $toolarray is an array of arrays each of which includes the
4004                  * opening tag, the closing tag, optionally a sample text that is
4005                  * inserted between the two when no selection is highlighted
4006                  * and.  The tip text is shown when the user moves the mouse
4007                  * over the button.
4008                  *
4009                  * Images are defined in ResourceLoaderEditToolbarModule.
4010                  */
4011                 $toolarray = [
4012                         [
4013                                 'id'     => 'mw-editbutton-bold',
4014                                 'open'   => '\'\'\'',
4015                                 'close'  => '\'\'\'',
4016                                 'sample' => wfMessage( 'bold_sample' )->text(),
4017                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4018                         ],
4019                         [
4020                                 'id'     => 'mw-editbutton-italic',
4021                                 'open'   => '\'\'',
4022                                 'close'  => '\'\'',
4023                                 'sample' => wfMessage( 'italic_sample' )->text(),
4024                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4025                         ],
4026                         [
4027                                 'id'     => 'mw-editbutton-link',
4028                                 'open'   => '[[',
4029                                 'close'  => ']]',
4030                                 'sample' => wfMessage( 'link_sample' )->text(),
4031                                 'tip'    => wfMessage( 'link_tip' )->text(),
4032                         ],
4033                         [
4034                                 'id'     => 'mw-editbutton-extlink',
4035                                 'open'   => '[',
4036                                 'close'  => ']',
4037                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4038                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4039                         ],
4040                         [
4041                                 'id'     => 'mw-editbutton-headline',
4042                                 'open'   => "\n== ",
4043                                 'close'  => " ==\n",
4044                                 'sample' => wfMessage( 'headline_sample' )->text(),
4045                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4046                         ],
4047                         $imagesAvailable ? [
4048                                 'id'     => 'mw-editbutton-image',
4049                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4050                                 'close'  => ']]',
4051                                 'sample' => wfMessage( 'image_sample' )->text(),
4052                                 'tip'    => wfMessage( 'image_tip' )->text(),
4053                         ] : false,
4054                         $imagesAvailable ? [
4055                                 'id'     => 'mw-editbutton-media',
4056                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4057                                 'close'  => ']]',
4058                                 'sample' => wfMessage( 'media_sample' )->text(),
4059                                 'tip'    => wfMessage( 'media_tip' )->text(),
4060                         ] : false,
4061                         [
4062                                 'id'     => 'mw-editbutton-nowiki',
4063                                 'open'   => "<nowiki>",
4064                                 'close'  => "</nowiki>",
4065                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4066                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4067                         ],
4068                         $showSignature ? [
4069                                 'id'     => 'mw-editbutton-signature',
4070                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4071                                 'close'  => '',
4072                                 'sample' => '',
4073                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4074                         ] : false,
4075                         [
4076                                 'id'     => 'mw-editbutton-hr',
4077                                 'open'   => "\n----\n",
4078                                 'close'  => '',
4079                                 'sample' => '',
4080                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4081                         ]
4082                 ];
4083
4084                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4085                 foreach ( $toolarray as $tool ) {
4086                         if ( !$tool ) {
4087                                 continue;
4088                         }
4089
4090                         $params = [
4091                                 // Images are defined in ResourceLoaderEditToolbarModule
4092                                 false,
4093                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4094                                 // Older browsers show a "speedtip" type message only for ALT.
4095                                 // Ideally these should be different, realistically they
4096                                 // probably don't need to be.
4097                                 $tool['tip'],
4098                                 $tool['open'],
4099                                 $tool['close'],
4100                                 $tool['sample'],
4101                                 $tool['id'],
4102                         ];
4103
4104                         $script .= Xml::encodeJsCall(
4105                                 'mw.toolbar.addButton',
4106                                 $params,
4107                                 ResourceLoader::inDebugMode()
4108                         );
4109                 }
4110
4111                 $script .= '});';
4112
4113                 $toolbar = '<div id="toolbar"></div>';
4114
4115                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4116                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4117                         // been over-written by a hook caller
4118                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4119                 };
4120
4121                 return $toolbar;
4122         }
4123
4124         /**
4125          * Return an array of checkbox definitions.
4126          *
4127          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4128          *
4129          * Array values are associative arrays with the following keys:
4130          *  - 'label-message' (required): message for label text
4131          *  - 'id' (required): 'id' attribute for the `<input>`
4132          *  - 'default' (required): default checkedness (true or false)
4133          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4134          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4135          *    from messages like 'tooltip-foo', 'accesskey-foo'
4136          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4137          *  - 'legacy-name' (optional): short name for backwards-compatibility
4138          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4139          *   where bool indicates the checked status of the checkbox
4140          * @return array
4141          */
4142         public function getCheckboxesDefinition( $checked ) {
4143                 $checkboxes = [];
4144
4145                 $user = $this->context->getUser();
4146                 // don't show the minor edit checkbox if it's a new page or section
4147                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4148                         $checkboxes['wpMinoredit'] = [
4149                                 'id' => 'wpMinoredit',
4150                                 'label-message' => 'minoredit',
4151                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4152                                 'tooltip' => 'minoredit',
4153                                 'label-id' => 'mw-editpage-minoredit',
4154                                 'legacy-name' => 'minor',
4155                                 'default' => $checked['minor'],
4156                         ];
4157                 }
4158
4159                 if ( $user->isLoggedIn() ) {
4160                         $checkboxes['wpWatchthis'] = [
4161                                 'id' => 'wpWatchthis',
4162                                 'label-message' => 'watchthis',
4163                                 // Uses messages: tooltip-watch, accesskey-watch
4164                                 'tooltip' => 'watch',
4165                                 'label-id' => 'mw-editpage-watch',
4166                                 'legacy-name' => 'watch',
4167                                 'default' => $checked['watch'],
4168                         ];
4169                 }
4170
4171                 $editPage = $this;
4172                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4173
4174                 return $checkboxes;
4175         }
4176
4177         /**
4178          * Returns an array of html code of the following checkboxes old style:
4179          * minor and watch
4180          *
4181          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4182          * @param int &$tabindex Current tabindex
4183          * @param array $checked See getCheckboxesDefinition()
4184          * @return array
4185          */
4186         public function getCheckboxes( &$tabindex, $checked ) {
4187                 $checkboxes = [];
4188                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4189
4190                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4191                 if ( !$this->isNew ) {
4192                         $checkboxes['minor'] = '';
4193                 }
4194                 $checkboxes['watch'] = '';
4195
4196                 foreach ( $checkboxesDef as $name => $options ) {
4197                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4198                         $label = $this->context->msg( $options['label-message'] )->parse();
4199                         $attribs = [
4200                                 'tabindex' => ++$tabindex,
4201                                 'id' => $options['id'],
4202                         ];
4203                         $labelAttribs = [
4204                                 'for' => $options['id'],
4205                         ];
4206                         if ( isset( $options['tooltip'] ) ) {
4207                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4208                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4209                         }
4210                         if ( isset( $options['title-message'] ) ) {
4211                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4212                         }
4213                         if ( isset( $options['label-id'] ) ) {
4214                                 $labelAttribs['id'] = $options['label-id'];
4215                         }
4216                         $checkboxHtml =
4217                                 Xml::check( $name, $options['default'], $attribs ) .
4218                                 '&#160;' .
4219                                 Xml::tags( 'label', $labelAttribs, $label );
4220
4221                         $checkboxes[ $legacyName ] = $checkboxHtml;
4222                 }
4223
4224                 // Avoid PHP 7.1 warning of passing $this by reference
4225                 $editPage = $this;
4226                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4227                 return $checkboxes;
4228         }
4229
4230         /**
4231          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4232          * any other added by extensions.
4233          *
4234          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4235          * @param int &$tabindex Current tabindex
4236          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4237          *                 status of the checkbox
4238          *
4239          * @return array Associative array of string keys to OOUI\FieldLayout instances
4240          */
4241         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4242                 return $this->getCheckboxesWidget( $tabindex, $checked );
4243         }
4244
4245         /**
4246          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4247          * any other added by extensions.
4248          *
4249          * @param int &$tabindex Current tabindex
4250          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4251          *                 status of the checkbox
4252          *
4253          * @return array Associative array of string keys to OOUI\FieldLayout instances
4254          */
4255         public function getCheckboxesWidget( &$tabindex, $checked ) {
4256                 $checkboxes = [];
4257                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4258
4259                 foreach ( $checkboxesDef as $name => $options ) {
4260                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4261
4262                         $title = null;
4263                         $accesskey = null;
4264                         if ( isset( $options['tooltip'] ) ) {
4265                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4266                                 $title = Linker::titleAttrib( $options['tooltip'] );
4267                         }
4268                         if ( isset( $options['title-message'] ) ) {
4269                                 $title = $this->context->msg( $options['title-message'] )->text();
4270                         }
4271
4272                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4273                                 new OOUI\CheckboxInputWidget( [
4274                                         'tabIndex' => ++$tabindex,
4275                                         'accessKey' => $accesskey,
4276                                         'id' => $options['id'] . 'Widget',
4277                                         'inputId' => $options['id'],
4278                                         'name' => $name,
4279                                         'selected' => $options['default'],
4280                                         'infusable' => true,
4281                                 ] ),
4282                                 [
4283                                         'align' => 'inline',
4284                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4285                                         'title' => $title,
4286                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4287                                 ]
4288                         );
4289                 }
4290
4291                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4292                 // people have used it for the weirdest things completely unrelated to checkboxes...
4293                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4294                 $legacyCheckboxes = [];
4295                 if ( !$this->isNew ) {
4296                         $legacyCheckboxes['minor'] = '';
4297                 }
4298                 $legacyCheckboxes['watch'] = '';
4299                 // Copy new-style checkboxes into an old-style structure
4300                 foreach ( $checkboxes as $name => $oouiLayout ) {
4301                         $legacyCheckboxes[$name] = (string)$oouiLayout;
4302                 }
4303                 // Avoid PHP 7.1 warning of passing $this by reference
4304                 $ep = $this;
4305                 Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
4306                 // Copy back any additional old-style checkboxes into the new-style structure
4307                 foreach ( $legacyCheckboxes as $name => $html ) {
4308                         if ( $html && !isset( $checkboxes[$name] ) ) {
4309                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4310                         }
4311                 }
4312
4313                 return $checkboxes;
4314         }
4315
4316         /**
4317          * Get the message key of the label for the button to save the page
4318          *
4319          * @return string
4320          */
4321         protected function getSubmitButtonLabel() {
4322                 $labelAsPublish =
4323                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4324
4325                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4326                 $newPage = !$this->mTitle->exists();
4327
4328                 if ( $labelAsPublish ) {
4329                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4330                 } else {
4331                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4332                 }
4333
4334                 return $buttonLabelKey;
4335         }
4336
4337         /**
4338          * Returns an array of html code of the following buttons:
4339          * save, diff and preview
4340          *
4341          * @param int &$tabindex Current tabindex
4342          *
4343          * @return array
4344          */
4345         public function getEditButtons( &$tabindex ) {
4346                 $buttons = [];
4347
4348                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4349
4350                 $attribs = [
4351                         'name' => 'wpSave',
4352                         'tabindex' => ++$tabindex,
4353                 ];
4354
4355                 $saveConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4356                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4357                         'id' => 'wpSaveWidget',
4358                         'inputId' => 'wpSave',
4359                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4360                         'useInputTag' => true,
4361                         'flags' => [ 'constructive', 'primary' ],
4362                         'label' => $buttonLabel,
4363                         'infusable' => true,
4364                         'type' => 'submit',
4365                         'title' => Linker::titleAttrib( 'save' ),
4366                         'accessKey' => Linker::accesskey( 'save' ),
4367                 ] + $saveConfig );
4368
4369                 $attribs = [
4370                         'name' => 'wpPreview',
4371                         'tabindex' => ++$tabindex,
4372                 ];
4373
4374                 $previewConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4375                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4376                         'id' => 'wpPreviewWidget',
4377                         'inputId' => 'wpPreview',
4378                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4379                         'useInputTag' => true,
4380                         'label' => $this->context->msg( 'showpreview' )->text(),
4381                         'infusable' => true,
4382                         'type' => 'submit',
4383                         'title' => Linker::titleAttrib( 'preview' ),
4384                         'accessKey' => Linker::accesskey( 'preview' ),
4385                 ] + $previewConfig );
4386
4387                 $attribs = [
4388                         'name' => 'wpDiff',
4389                         'tabindex' => ++$tabindex,
4390                 ];
4391
4392                 $diffConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4393                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4394                         'id' => 'wpDiffWidget',
4395                         'inputId' => 'wpDiff',
4396                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4397                         'useInputTag' => true,
4398                         'label' => $this->context->msg( 'showdiff' )->text(),
4399                         'infusable' => true,
4400                         'type' => 'submit',
4401                         'title' => Linker::titleAttrib( 'diff' ),
4402                         'accessKey' => Linker::accesskey( 'diff' ),
4403                 ] + $diffConfig );
4404
4405                 // Avoid PHP 7.1 warning of passing $this by reference
4406                 $editPage = $this;
4407                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4408
4409                 return $buttons;
4410         }
4411
4412         /**
4413          * Creates a basic error page which informs the user that
4414          * they have attempted to edit a nonexistent section.
4415          */
4416         public function noSuchSectionPage() {
4417                 $out = $this->context->getOutput();
4418                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4419
4420                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4421
4422                 // Avoid PHP 7.1 warning of passing $this by reference
4423                 $editPage = $this;
4424                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4425                 $out->addHTML( $res );
4426
4427                 $out->returnToMain( false, $this->mTitle );
4428         }
4429
4430         /**
4431          * Show "your edit contains spam" page with your diff and text
4432          *
4433          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4434          */
4435         public function spamPageWithContent( $match = false ) {
4436                 $this->textbox2 = $this->textbox1;
4437
4438                 if ( is_array( $match ) ) {
4439                         $match = $this->context->getLanguage()->listToText( $match );
4440                 }
4441                 $out = $this->context->getOutput();
4442                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4443
4444                 $out->addHTML( '<div id="spamprotected">' );
4445                 $out->addWikiMsg( 'spamprotectiontext' );
4446                 if ( $match ) {
4447                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4448                 }
4449                 $out->addHTML( '</div>' );
4450
4451                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4452                 $this->showDiff();
4453
4454                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4455                 $this->showTextbox2();
4456
4457                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4458         }
4459
4460         /**
4461          * Check if the browser is on a blacklist of user-agents known to
4462          * mangle UTF-8 data on form submission. Returns true if Unicode
4463          * should make it through, false if it's known to be a problem.
4464          * @return bool
4465          */
4466         private function checkUnicodeCompliantBrowser() {
4467                 global $wgBrowserBlackList;
4468
4469                 $currentbrowser = $this->context->getRequest()->getHeader( 'User-Agent' );
4470                 if ( $currentbrowser === false ) {
4471                         // No User-Agent header sent? Trust it by default...
4472                         return true;
4473                 }
4474
4475                 foreach ( $wgBrowserBlackList as $browser ) {
4476                         if ( preg_match( $browser, $currentbrowser ) ) {
4477                                 return false;
4478                         }
4479                 }
4480                 return true;
4481         }
4482
4483         /**
4484          * Filter an input field through a Unicode de-armoring process if it
4485          * came from an old browser with known broken Unicode editing issues.
4486          *
4487          * @param WebRequest $request
4488          * @param string $field
4489          * @return string
4490          */
4491         protected function safeUnicodeInput( $request, $field ) {
4492                 $text = rtrim( $request->getText( $field ) );
4493                 return $request->getBool( 'safemode' )
4494                         ? $this->unmakeSafe( $text )
4495                         : $text;
4496         }
4497
4498         /**
4499          * Filter an output field through a Unicode armoring process if it is
4500          * going to an old browser with known broken Unicode editing issues.
4501          *
4502          * @param string $text
4503          * @return string
4504          */
4505         protected function safeUnicodeOutput( $text ) {
4506                 return $this->checkUnicodeCompliantBrowser()
4507                         ? $text
4508                         : $this->makeSafe( $text );
4509         }
4510
4511         /**
4512          * A number of web browsers are known to corrupt non-ASCII characters
4513          * in a UTF-8 text editing environment. To protect against this,
4514          * detected browsers will be served an armored version of the text,
4515          * with non-ASCII chars converted to numeric HTML character references.
4516          *
4517          * Preexisting such character references will have a 0 added to them
4518          * to ensure that round-trips do not alter the original data.
4519          *
4520          * @param string $invalue
4521          * @return string
4522          */
4523         private function makeSafe( $invalue ) {
4524                 // Armor existing references for reversibility.
4525                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4526
4527                 $bytesleft = 0;
4528                 $result = "";
4529                 $working = 0;
4530                 $valueLength = strlen( $invalue );
4531                 for ( $i = 0; $i < $valueLength; $i++ ) {
4532                         $bytevalue = ord( $invalue[$i] );
4533                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4534                                 $result .= chr( $bytevalue );
4535                                 $bytesleft = 0;
4536                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4537                                 $working = $working << 6;
4538                                 $working += ( $bytevalue & 0x3F );
4539                                 $bytesleft--;
4540                                 if ( $bytesleft <= 0 ) {
4541                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4542                                 }
4543                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4544                                 $working = $bytevalue & 0x1F;
4545                                 $bytesleft = 1;
4546                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4547                                 $working = $bytevalue & 0x0F;
4548                                 $bytesleft = 2;
4549                         } else { // 1111 0xxx
4550                                 $working = $bytevalue & 0x07;
4551                                 $bytesleft = 3;
4552                         }
4553                 }
4554                 return $result;
4555         }
4556
4557         /**
4558          * Reverse the previously applied transliteration of non-ASCII characters
4559          * back to UTF-8. Used to protect data from corruption by broken web browsers
4560          * as listed in $wgBrowserBlackList.
4561          *
4562          * @param string $invalue
4563          * @return string
4564          */
4565         private function unmakeSafe( $invalue ) {
4566                 $result = "";
4567                 $valueLength = strlen( $invalue );
4568                 for ( $i = 0; $i < $valueLength; $i++ ) {
4569                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4570                                 $i += 3;
4571                                 $hexstring = "";
4572                                 do {
4573                                         $hexstring .= $invalue[$i];
4574                                         $i++;
4575                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4576
4577                                 // Do some sanity checks. These aren't needed for reversibility,
4578                                 // but should help keep the breakage down if the editor
4579                                 // breaks one of the entities whilst editing.
4580                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4581                                         $codepoint = hexdec( $hexstring );
4582                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4583                                 } else {
4584                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4585                                 }
4586                         } else {
4587                                 $result .= substr( $invalue, $i, 1 );
4588                         }
4589                 }
4590                 // reverse the transform that we made for reversibility reasons.
4591                 return strtr( $result, [ "&#x0" => "&#x" ] );
4592         }
4593
4594         /**
4595          * @since 1.29
4596          */
4597         protected function addEditNotices() {
4598                 $out = $this->context->getOutput();
4599                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4600                 if ( count( $editNotices ) ) {
4601                         $out->addHTML( implode( "\n", $editNotices ) );
4602                 } else {
4603                         $msg = $this->context->msg( 'editnotice-notext' );
4604                         if ( !$msg->isDisabled() ) {
4605                                 $out->addHTML(
4606                                         '<div class="mw-editnotice-notext">'
4607                                         . $msg->parseAsBlock()
4608                                         . '</div>'
4609                                 );
4610                         }
4611                 }
4612         }
4613
4614         /**
4615          * @since 1.29
4616          */
4617         protected function addTalkPageText() {
4618                 if ( $this->mTitle->isTalkPage() ) {
4619                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4620                 }
4621         }
4622
4623         /**
4624          * @since 1.29
4625          */
4626         protected function addLongPageWarningHeader() {
4627                 global $wgMaxArticleSize;
4628
4629                 if ( $this->contentLength === false ) {
4630                         $this->contentLength = strlen( $this->textbox1 );
4631                 }
4632
4633                 $out = $this->context->getOutput();
4634                 $lang = $this->context->getLanguage();
4635                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4636                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4637                                 [
4638                                         'longpageerror',
4639                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4640                                         $lang->formatNum( $wgMaxArticleSize )
4641                                 ]
4642                         );
4643                 } else {
4644                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4645                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4646                                         [
4647                                                 'longpage-hint',
4648                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4649                                                 strlen( $this->textbox1 )
4650                                         ]
4651                                 );
4652                         }
4653                 }
4654         }
4655
4656         /**
4657          * @since 1.29
4658          */
4659         protected function addPageProtectionWarningHeaders() {
4660                 $out = $this->context->getOutput();
4661                 if ( $this->mTitle->isProtected( 'edit' ) &&
4662                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4663                 ) {
4664                         # Is the title semi-protected?
4665                         if ( $this->mTitle->isSemiProtected() ) {
4666                                 $noticeMsg = 'semiprotectedpagewarning';
4667                         } else {
4668                                 # Then it must be protected based on static groups (regular)
4669                                 $noticeMsg = 'protectedpagewarning';
4670                         }
4671                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4672                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4673                 }
4674                 if ( $this->mTitle->isCascadeProtected() ) {
4675                         # Is this page under cascading protection from some source pages?
4676                         /** @var Title[] $cascadeSources */
4677                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4678                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4679                         $cascadeSourcesCount = count( $cascadeSources );
4680                         if ( $cascadeSourcesCount > 0 ) {
4681                                 # Explain, and list the titles responsible
4682                                 foreach ( $cascadeSources as $page ) {
4683                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4684                                 }
4685                         }
4686                         $notice .= '</div>';
4687                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4688                 }
4689                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4690                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4691                                 [ 'lim' => 1,
4692                                         'showIfEmpty' => false,
4693                                         'msgKey' => [ 'titleprotectedwarning' ],
4694                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4695                 }
4696         }
4697
4698         /**
4699          * @param OutputPage $out
4700          * @since 1.29
4701          */
4702         protected function addExplainConflictHeader( OutputPage $out ) {
4703                 $out->wrapWikiMsg(
4704                         "<div class='mw-explainconflict'>\n$1\n</div>",
4705                         [ 'explainconflict', $this->context->msg( $this->getSubmitButtonLabel() )->text() ]
4706                 );
4707         }
4708
4709         /**
4710          * @param string $name
4711          * @param mixed[] $customAttribs
4712          * @param User $user
4713          * @return mixed[]
4714          * @since 1.29
4715          */
4716         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4717                 $attribs = $customAttribs + [
4718                                 'accesskey' => ',',
4719                                 'id' => $name,
4720                                 'cols' => 80,
4721                                 'rows' => 25,
4722                                 // Avoid PHP notices when appending preferences
4723                                 // (appending allows customAttribs['style'] to still work).
4724                                 'style' => ''
4725                         ];
4726
4727                 // The following classes can be used here:
4728                 // * mw-editfont-default
4729                 // * mw-editfont-monospace
4730                 // * mw-editfont-sans-serif
4731                 // * mw-editfont-serif
4732                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4733
4734                 if ( isset( $attribs['class'] ) ) {
4735                         if ( is_string( $attribs['class'] ) ) {
4736                                 $attribs['class'] .= ' ' . $class;
4737                         } elseif ( is_array( $attribs['class'] ) ) {
4738                                 $attribs['class'][] = $class;
4739                         }
4740                 } else {
4741                         $attribs['class'] = $class;
4742                 }
4743
4744                 $pageLang = $this->mTitle->getPageLanguage();
4745                 $attribs['lang'] = $pageLang->getHtmlCode();
4746                 $attribs['dir'] = $pageLang->getDir();
4747
4748                 return $attribs;
4749         }
4750
4751         /**
4752          * @param string $wikitext
4753          * @return string
4754          * @since 1.29
4755          */
4756         protected function addNewLineAtEnd( $wikitext ) {
4757                 if ( strval( $wikitext ) !== '' ) {
4758                         // Ensure there's a newline at the end, otherwise adding lines
4759                         // is awkward.
4760                         // But don't add a newline if the text is empty, or Firefox in XHTML
4761                         // mode will show an extra newline. A bit annoying.
4762                         $wikitext .= "\n";
4763                         return $wikitext;
4764                 }
4765                 return $wikitext;
4766         }
4767
4768         /**
4769          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4770          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4771          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4772          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4773          * spread the new style links more efficiently.
4774          *
4775          * @param string $text
4776          * @return string
4777          */
4778         private function guessSectionName( $text ) {
4779                 global $wgParser;
4780
4781                 // Detect Microsoft browsers
4782                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4783                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4784                         // ...and redirect them to legacy encoding, if available
4785                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4786                 }
4787                 // Meanwhile, real browsers get real anchors
4788                 return $wgParser->guessSectionNameFromWikiText( $text );
4789         }
4790 }