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\EditPage\TextboxBuilder;
  24 use MediaWiki\EditPage\TextConflictHelper;
  25 use MediaWiki\Logger\LoggerFactory;
  26 use MediaWiki\MediaWikiServices;
  27 use Wikimedia\ScopedCallback;
  28
  29 /**
  30  * The edit page/HTML interface (split from Article)
  31  * The actual database and text munging is still in Article,
  32  * but it should get easier to call those from alternate
  33  * interfaces.
  34  *
  35  * EditPage cares about two distinct titles:
  36  * $this->mContextTitle is the page that forms submit to, links point to,
  37  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  38  * page in the database that is actually being edited. These are
  39  * usually the same, but they are now allowed to be different.
  40  *
  41  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  42  * headaches, which may be fatal.
  43  */
  44 class EditPage {
  45         /**
  46          * Used for Unicode support checks
  47          */
  48         const UNICODE_CHECK = 'ℳ𝒲♥𝓊𝓃𝒾𝒸ℴ𝒹ℯ';
  49
  50         /**
  51          * Status: Article successfully updated
  52          */
  53         const AS_SUCCESS_UPDATE = 200;
  54
  55         /**
  56          * Status: Article successfully created
  57          */
  58         const AS_SUCCESS_NEW_ARTICLE = 201;
  59
  60         /**
  61          * Status: Article update aborted by a hook function
  62          */
  63         const AS_HOOK_ERROR = 210;
  64
  65         /**
  66          * Status: A hook function returned an error
  67          */
  68         const AS_HOOK_ERROR_EXPECTED = 212;
  69
  70         /**
  71          * Status: User is blocked from editing this page
  72          */
  73         const AS_BLOCKED_PAGE_FOR_USER = 215;
  74
  75         /**
  76          * Status: Content too big (> $wgMaxArticleSize)
  77          */
  78         const AS_CONTENT_TOO_BIG = 216;
  79
  80         /**
  81          * Status: this anonymous user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_ANON = 218;
  84
  85         /**
  86          * Status: this logged in user is not allowed to edit this page
  87          */
  88         const AS_READ_ONLY_PAGE_LOGGED = 219;
  89
  90         /**
  91          * Status: wiki is in readonly mode (wfReadOnly() == true)
  92          */
  93         const AS_READ_ONLY_PAGE = 220;
  94
  95         /**
  96          * Status: rate limiter for action 'edit' was tripped
  97          */
  98         const AS_RATE_LIMITED = 221;
  99
 100         /**
 101          * Status: article was deleted while editing and param wpRecreate == false or form
 102          * was not posted
 103          */
 104         const AS_ARTICLE_WAS_DELETED = 222;
 105
 106         /**
 107          * Status: user tried to create this page, but is not allowed to do that
 108          * ( Title->userCan('create') == false )
 109          */
 110         const AS_NO_CREATE_PERMISSION = 223;
 111
 112         /**
 113          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 114          */
 115         const AS_BLANK_ARTICLE = 224;
 116
 117         /**
 118          * Status: (non-resolvable) edit conflict
 119          */
 120         const AS_CONFLICT_DETECTED = 225;
 121
 122         /**
 123          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 124          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 125          */
 126         const AS_SUMMARY_NEEDED = 226;
 127
 128         /**
 129          * Status: user tried to create a new section without content
 130          */
 131         const AS_TEXTBOX_EMPTY = 228;
 132
 133         /**
 134          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 135          */
 136         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessful
 140          */
 141         const AS_END = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED = 234;
 157
 158         /**
 159          * Status: user tried to modify the content model, but is not allowed to do that
 160          * ( User::isAllowed('editcontentmodel') == false )
 161          */
 162         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 163
 164         /**
 165          * Status: user tried to create self-redirect (redirect to the same article) and
 166          * wpIgnoreSelfRedirect == false
 167          */
 168         const AS_SELF_REDIRECT = 236;
 169
 170         /**
 171          * Status: an error relating to change tagging. Look at the message key for
 172          * more details
 173          */
 174         const AS_CHANGE_TAG_ERROR = 237;
 175
 176         /**
 177          * Status: can't parse content
 178          */
 179         const AS_PARSE_ERROR = 240;
 180
 181         /**
 182          * Status: when changing the content model is disallowed due to
 183          * $wgContentHandlerUseDB being false
 184          */
 185         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 186
 187         /**
 188          * Status: edit rejected because browser doesn't support Unicode.
 189          */
 190         const AS_UNICODE_NOT_SUPPORTED = 242;
 191
 192         /**
 193          * HTML id and name for the beginning of the edit form.
 194          */
 195         const EDITFORM_ID = 'editform';
 196
 197         /**
 198          * Prefix of key for cookie used to pass post-edit state.
 199          * The revision id edited is added after this
 200          */
 201         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 202
 203         /**
 204          * Duration of PostEdit cookie, in seconds.
 205          * The cookie will be removed instantly if the JavaScript runs.
 206          *
 207          * Otherwise, though, we don't want the cookies to accumulate.
 208          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 209          * limit of only 20 cookies per domain. This still applies at least to some
 210          * versions of IE without full updates:
 211          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 212          *
 213          * A value of 20 minutes should be enough to take into account slow loads and minor
 214          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 215          */
 216         const POST_EDIT_COOKIE_DURATION = 1200;
 217
 218         /**
 219          * @deprecated for public usage since 1.30 use EditPage::getArticle()
 220          * @var Article
 221          */
 222         public $mArticle;
 223         /** @var WikiPage */
 224         private $page;
 225
 226         /**
 227          * @deprecated for public usage since 1.30 use EditPage::getTitle()
 228          * @var Title
 229          */
 230         public $mTitle;
 231
 232         /** @var null|Title */
 233         private $mContextTitle = null;
 234
 235         /** @var string */
 236         public $action = 'submit';
 237
 238         /** @var bool */
 239         public $isConflict = false;
 240
 241         /**
 242          * @deprecated since 1.30 use Title::isCssJsSubpage()
 243          * @var bool
 244          */
 245         public $isCssJsSubpage = false;
 246
 247         /**
 248          * @deprecated since 1.30 use Title::isCssSubpage()
 249          * @var bool
 250          */
 251         public $isCssSubpage = false;
 252
 253         /**
 254          * @deprecated since 1.30 use Title::isJsSubpage()
 255          * @var bool
 256          */
 257         public $isJsSubpage = false;
 258
 259         /**
 260          * @deprecated since 1.30
 261          * @var bool
 262          */
 263         public $isWrongCaseCssJsPage = false;
 264
 265         /** @var bool New page or new section */
 266         public $isNew = false;
 267
 268         /** @var bool */
 269         public $deletedSinceEdit;
 270
 271         /** @var string */
 272         public $formtype;
 273
 274         /** @var bool */
 275         public $firsttime;
 276
 277         /** @var bool|stdClass */
 278         public $lastDelete;
 279
 280         /** @var bool */
 281         public $mTokenOk = false;
 282
 283         /** @var bool */
 284         public $mTokenOkExceptSuffix = false;
 285
 286         /** @var bool */
 287         public $mTriedSave = false;
 288
 289         /** @var bool */
 290         public $incompleteForm = false;
 291
 292         /** @var bool */
 293         public $tooBig = false;
 294
 295         /** @var bool */
 296         public $missingComment = false;
 297
 298         /** @var bool */
 299         public $missingSummary = false;
 300
 301         /** @var bool */
 302         public $allowBlankSummary = false;
 303
 304         /** @var bool */
 305         protected $blankArticle = false;
 306
 307         /** @var bool */
 308         protected $allowBlankArticle = false;
 309
 310         /** @var bool */
 311         protected $selfRedirect = false;
 312
 313         /** @var bool */
 314         protected $allowSelfRedirect = false;
 315
 316         /** @var string */
 317         public $autoSumm = '';
 318
 319         /** @var string */
 320         public $hookError = '';
 321
 322         /** @var ParserOutput */
 323         public $mParserOutput;
 324
 325         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 326         public $hasPresetSummary = false;
 327
 328         /** @var Revision|bool */
 329         public $mBaseRevision = false;
 330
 331         /** @var bool */
 332         public $mShowSummaryField = true;
 333
 334         # Form values
 335
 336         /** @var bool */
 337         public $save = false;
 338
 339         /** @var bool */
 340         public $preview = false;
 341
 342         /** @var bool */
 343         public $diff = false;
 344
 345         /** @var bool */
 346         public $minoredit = false;
 347
 348         /** @var bool */
 349         public $watchthis = false;
 350
 351         /** @var bool */
 352         public $recreate = false;
 353
 354         /** @var string */
 355         public $textbox1 = '';
 356
 357         /** @var string */
 358         public $textbox2 = '';
 359
 360         /** @var string */
 361         public $summary = '';
 362
 363         /** @var bool */
 364         public $nosummary = false;
 365
 366         /** @var string */
 367         public $edittime = '';
 368
 369         /** @var int */
 370         private $editRevId = null;
 371
 372         /** @var string */
 373         public $section = '';
 374
 375         /** @var string */
 376         public $sectiontitle = '';
 377
 378         /** @var string */
 379         public $starttime = '';
 380
 381         /** @var int */
 382         public $oldid = 0;
 383
 384         /** @var int */
 385         public $parentRevId = 0;
 386
 387         /** @var string */
 388         public $editintro = '';
 389
 390         /** @var null */
 391         public $scrolltop = null;
 392
 393         /** @var bool */
 394         public $bot = true;
 395
 396         /** @var string */
 397         public $contentModel;
 398
 399         /** @var null|string */
 400         public $contentFormat = null;
 401
 402         /** @var null|array */
 403         private $changeTags = null;
 404
 405         # Placeholders for text injection by hooks (must be HTML)
 406         # extensions should take care to _append_ to the present value
 407
 408         /** @var string Before even the preview */
 409         public $editFormPageTop = '';
 410         public $editFormTextTop = '';
 411         public $editFormTextBeforeContent = '';
 412         public $editFormTextAfterWarn = '';
 413         public $editFormTextAfterTools = '';
 414         public $editFormTextBottom = '';
 415         public $editFormTextAfterContent = '';
 416         public $previewTextAfterContent = '';
 417         public $mPreloadContent = null;
 418
 419         /* $didSave should be set to true whenever an article was successfully altered. */
 420         public $didSave = false;
 421         public $undidRev = 0;
 422
 423         public $suppressIntro = false;
 424
 425         /** @var bool */
 426         protected $edit;
 427
 428         /** @var bool|int */
 429         protected $contentLength = false;
 430
 431         /**
 432          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 433          */
 434         private $enableApiEditOverride = false;
 435
 436         /**
 437          * @var IContextSource
 438          */
 439         protected $context;
 440
 441         /**
 442          * @var bool Whether an old revision is edited
 443          */
 444         private $isOldRev = false;
 445
 446         /**
 447          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 448          */
 449         private $unicodeCheck;
 450
 451         /**
 452          * Factory function to create an edit conflict helper
 453          *
 454          * @var callable
 455          */
 456         private $editConflictHelperFactory;
 457
 458         /**
 459          * @var TextConflictHelper|null
 460          */
 461         private $editConflictHelper;
 462
 463         /**
 464          * @param Article $article
 465          */
 466         public function __construct( Article $article ) {
 467                 $this->mArticle = $article;
 468                 $this->page = $article->getPage(); // model object
 469                 $this->mTitle = $article->getTitle();
 470                 $this->context = $article->getContext();
 471
 472                 $this->contentModel = $this->mTitle->getContentModel();
 473
 474                 $handler = ContentHandler::getForModelID( $this->contentModel );
 475                 $this->contentFormat = $handler->getDefaultFormat();
 476                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 477         }
 478
 479         /**
 480          * @return Article
 481          */
 482         public function getArticle() {
 483                 return $this->mArticle;
 484         }
 485
 486         /**
 487          * @since 1.28
 488          * @return IContextSource
 489          */
 490         public function getContext() {
 491                 return $this->context;
 492         }
 493
 494         /**
 495          * @since 1.19
 496          * @return Title
 497          */
 498         public function getTitle() {
 499                 return $this->mTitle;
 500         }
 501
 502         /**
 503          * Set the context Title object
 504          *
 505          * @param Title|null $title Title object or null
 506          */
 507         public function setContextTitle( $title ) {
 508                 $this->mContextTitle = $title;
 509         }
 510
 511         /**
 512          * Get the context title object.
 513          * If not set, $wgTitle will be returned. This behavior might change in
 514          * the future to return $this->mTitle instead.
 515          *
 516          * @return Title
 517          */
 518         public function getContextTitle() {
 519                 if ( is_null( $this->mContextTitle ) ) {
 520                         wfDebugLog(
 521                                 'GlobalTitleFail',
 522                                 __METHOD__ . ' called by ' . wfGetAllCallers( 5 ) . ' with no title set.'
 523                         );
 524                         global $wgTitle;
 525                         return $wgTitle;
 526                 } else {
 527                         return $this->mContextTitle;
 528                 }
 529         }
 530
 531         /**
 532          * Check if the edit page is using OOUI controls
 533          * @return bool Always true
 534          * @deprecated since 1.30
 535          */
 536         public function isOouiEnabled() {
 537                 wfDeprecated( __METHOD__, '1.30' );
 538                 return true;
 539         }
 540
 541         /**
 542          * Returns if the given content model is editable.
 543          *
 544          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 545          * @return bool
 546          * @throws MWException If $modelId has no known handler
 547          */
 548         public function isSupportedContentModel( $modelId ) {
 549                 return $this->enableApiEditOverride === true ||
 550                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 551         }
 552
 553         /**
 554          * Allow editing of content that supports API direct editing, but not general
 555          * direct editing. Set to false by default.
 556          *
 557          * @param bool $enableOverride
 558          */
 559         public function setApiEditOverride( $enableOverride ) {
 560                 $this->enableApiEditOverride = $enableOverride;
 561         }
 562
 563         /**
 564          * @deprecated since 1.29, call edit directly
 565          */
 566         public function submit() {
 567                 wfDeprecated( __METHOD__, '1.29' );
 568                 $this->edit();
 569         }
 570
 571         /**
 572          * This is the function that gets called for "action=edit". It
 573          * sets up various member variables, then passes execution to
 574          * another function, usually showEditForm()
 575          *
 576          * The edit form is self-submitting, so that when things like
 577          * preview and edit conflicts occur, we get the same form back
 578          * with the extra stuff added.  Only when the final submission
 579          * is made and all is well do we actually save and redirect to
 580          * the newly-edited page.
 581          */
 582         public function edit() {
 583                 // Allow extensions to modify/prevent this form or submission
 584                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 585                         return;
 586                 }
 587
 588                 wfDebug( __METHOD__ . ": enter\n" );
 589
 590                 $request = $this->context->getRequest();
 591                 // If they used redlink=1 and the page exists, redirect to the main article
 592                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 593                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 594                         return;
 595                 }
 596
 597                 $this->importFormData( $request );
 598                 $this->firsttime = false;
 599
 600                 if ( wfReadOnly() && $this->save ) {
 601                         // Force preview
 602                         $this->save = false;
 603                         $this->preview = true;
 604                 }
 605
 606                 if ( $this->save ) {
 607                         $this->formtype = 'save';
 608                 } elseif ( $this->preview ) {
 609                         $this->formtype = 'preview';
 610                 } elseif ( $this->diff ) {
 611                         $this->formtype = 'diff';
 612                 } else { # First time through
 613                         $this->firsttime = true;
 614                         if ( $this->previewOnOpen() ) {
 615                                 $this->formtype = 'preview';
 616                         } else {
 617                                 $this->formtype = 'initial';
 618                         }
 619                 }
 620
 621                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 622                 if ( $permErrors ) {
 623                         wfDebug( __METHOD__ . ": User can't edit\n" );
 624                         // Auto-block user's IP if the account was "hard" blocked
 625                         if ( !wfReadOnly() ) {
 626                                 DeferredUpdates::addCallableUpdate( function () {
 627                                         $this->context->getUser()->spreadAnyEditBlock();
 628                                 } );
 629                         }
 630                         $this->displayPermissionsError( $permErrors );
 631
 632                         return;
 633                 }
 634
 635                 $revision = $this->mArticle->getRevisionFetched();
 636                 // Disallow editing revisions with content models different from the current one
 637                 // Undo edits being an exception in order to allow reverting content model changes.
 638                 if ( $revision
 639                         && $revision->getContentModel() !== $this->contentModel
 640                 ) {
 641                         $prevRev = null;
 642                         if ( $this->undidRev ) {
 643                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 644                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 645                         }
 646                         if ( !$this->undidRev
 647                                 || !$prevRev
 648                                 || $prevRev->getContentModel() !== $this->contentModel
 649                         ) {
 650                                 $this->displayViewSourcePage(
 651                                         $this->getContentObject(),
 652                                         $this->context->msg(
 653                                                 'contentmodelediterror',
 654                                                 $revision->getContentModel(),
 655                                                 $this->contentModel
 656                                         )->plain()
 657                                 );
 658                                 return;
 659                         }
 660                 }
 661
 662                 $this->isConflict = false;
 663                 // css / js subpages of user pages get a special treatment
 664                 // The following member variables are deprecated since 1.30,
 665                 // the functions should be used instead.
 666                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 667                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 668                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 669                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 670
 671                 # Show applicable editing introductions
 672                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 673                         $this->showIntro();
 674                 }
 675
 676                 # Attempt submission here.  This will check for edit conflicts,
 677                 # and redundantly check for locked database, blocked IPs, etc.
 678                 # that edit() already checked just in case someone tries to sneak
 679                 # in the back door with a hand-edited submission URL.
 680
 681                 if ( 'save' == $this->formtype ) {
 682                         $resultDetails = null;
 683                         $status = $this->attemptSave( $resultDetails );
 684                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 685                                 return;
 686                         }
 687                 }
 688
 689                 # First time through: get contents, set time for conflict
 690                 # checking, etc.
 691                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 692                         if ( $this->initialiseForm() === false ) {
 693                                 $this->noSuchSectionPage();
 694                                 return;
 695                         }
 696
 697                         if ( !$this->mTitle->getArticleID() ) {
 698                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 699                         } else {
 700                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 701                         }
 702
 703                 }
 704
 705                 $this->showEditForm();
 706         }
 707
 708         /**
 709          * @param string $rigor Same format as Title::getUserPermissionErrors()
 710          * @return array
 711          */
 712         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 713                 $user = $this->context->getUser();
 714                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 715                 # Can this title be created?
 716                 if ( !$this->mTitle->exists() ) {
 717                         $permErrors = array_merge(
 718                                 $permErrors,
 719                                 wfArrayDiff2(
 720                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 721                                         $permErrors
 722                                 )
 723                         );
 724                 }
 725                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 726                 $remove = [];
 727                 foreach ( $permErrors as $error ) {
 728                         if ( ( $this->preview || $this->diff )
 729                                 && (
 730                                         $error[0] == 'blockedtext' ||
 731                                         $error[0] == 'autoblockedtext' ||
 732                                         $error[0] == 'systemblockedtext'
 733                                 )
 734                         ) {
 735                                 $remove[] = $error;
 736                         }
 737                 }
 738                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 739
 740                 return $permErrors;
 741         }
 742
 743         /**
 744          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 745          * but with the following differences:
 746          * - If redlink=1, the user will be redirected to the page
 747          * - If there is content to display or the error occurs while either saving,
 748          *   previewing or showing the difference, it will be a
 749          *   "View source for ..." page displaying the source code after the error message.
 750          *
 751          * @since 1.19
 752          * @param array $permErrors Array of permissions errors, as returned by
 753          *    Title::getUserPermissionsErrors().
 754          * @throws PermissionsError
 755          */
 756         protected function displayPermissionsError( array $permErrors ) {
 757                 $out = $this->context->getOutput();
 758                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 759                         // The edit page was reached via a red link.
 760                         // Redirect to the article page and let them click the edit tab if
 761                         // they really want a permission error.
 762                         $out->redirect( $this->mTitle->getFullURL() );
 763                         return;
 764                 }
 765
 766                 $content = $this->getContentObject();
 767
 768                 # Use the normal message if there's nothing to display
 769                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 770                         $action = $this->mTitle->exists() ? 'edit' :
 771                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 772                         throw new PermissionsError( $action, $permErrors );
 773                 }
 774
 775                 $this->displayViewSourcePage(
 776                         $content,
 777                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 778                 );
 779         }
 780
 781         /**
 782          * Display a read-only View Source page
 783          * @param Content $content
 784          * @param string $errorMessage additional wikitext error message to display
 785          */
 786         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 787                 $out = $this->context->getOutput();
 788                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 789
 790                 $out->setRobotPolicy( 'noindex,nofollow' );
 791                 $out->setPageTitle( $this->context->msg(
 792                         'viewsource-title',
 793                         $this->getContextTitle()->getPrefixedText()
 794                 ) );
 795                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 796                 $out->addHTML( $this->editFormPageTop );
 797                 $out->addHTML( $this->editFormTextTop );
 798
 799                 if ( $errorMessage !== '' ) {
 800                         $out->addWikiText( $errorMessage );
 801                         $out->addHTML( "<hr />\n" );
 802                 }
 803
 804                 # If the user made changes, preserve them when showing the markup
 805                 # (This happens when a user is blocked during edit, for instance)
 806                 if ( !$this->firsttime ) {
 807                         $text = $this->textbox1;
 808                         $out->addWikiMsg( 'viewyourtext' );
 809                 } else {
 810                         try {
 811                                 $text = $this->toEditText( $content );
 812                         } catch ( MWException $e ) {
 813                                 # Serialize using the default format if the content model is not supported
 814                                 # (e.g. for an old revision with a different model)
 815                                 $text = $content->serialize();
 816                         }
 817                         $out->addWikiMsg( 'viewsourcetext' );
 818                 }
 819
 820                 $out->addHTML( $this->editFormTextBeforeContent );
 821                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 822                 $out->addHTML( $this->editFormTextAfterContent );
 823
 824                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 825
 826                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 827
 828                 $out->addHTML( $this->editFormTextBottom );
 829                 if ( $this->mTitle->exists() ) {
 830                         $out->returnToMain( null, $this->mTitle );
 831                 }
 832         }
 833
 834         /**
 835          * Should we show a preview when the edit form is first shown?
 836          *
 837          * @return bool
 838          */
 839         protected function previewOnOpen() {
 840                 $config = $this->context->getConfig();
 841                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 842                 $request = $this->context->getRequest();
 843                 if ( $config->get( 'RawHtml' ) ) {
 844                         // If raw HTML is enabled, disable preview on open
 845                         // since it has to be posted with a token for
 846                         // security reasons
 847                         return false;
 848                 }
 849                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 850                         // Explicit override from request
 851                         return true;
 852                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 853                         // Explicit override from request
 854                         return false;
 855                 } elseif ( $this->section == 'new' ) {
 856                         // Nothing *to* preview for new sections
 857                         return false;
 858                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 859                         && $this->context->getUser()->getOption( 'previewonfirst' )
 860                 ) {
 861                         // Standard preference behavior
 862                         return true;
 863                 } elseif ( !$this->mTitle->exists()
 864                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 865                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 866                 ) {
 867                         // Categories are special
 868                         return true;
 869                 } else {
 870                         return false;
 871                 }
 872         }
 873
 874         /**
 875          * Checks whether the user entered a skin name in uppercase,
 876          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 877          *
 878          * @return bool
 879          */
 880         protected function isWrongCaseCssJsPage() {
 881                 if ( $this->mTitle->isCssJsSubpage() ) {
 882                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 883                         $skins = array_merge(
 884                                 array_keys( Skin::getSkinNames() ),
 885                                 [ 'common' ]
 886                         );
 887                         return !in_array( $name, $skins )
 888                                 && in_array( strtolower( $name ), $skins );
 889                 } else {
 890                         return false;
 891                 }
 892         }
 893
 894         /**
 895          * Returns whether section editing is supported for the current page.
 896          * Subclasses may override this to replace the default behavior, which is
 897          * to check ContentHandler::supportsSections.
 898          *
 899          * @return bool True if this edit page supports sections, false otherwise.
 900          */
 901         protected function isSectionEditSupported() {
 902                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 903                 return $contentHandler->supportsSections();
 904         }
 905
 906         /**
 907          * This function collects the form data and uses it to populate various member variables.
 908          * @param WebRequest &$request
 909          * @throws ErrorPageError
 910          */
 911         public function importFormData( &$request ) {
 912                 # Section edit can come from either the form or a link
 913                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 914
 915                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 916                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 917                 }
 918
 919                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 920
 921                 if ( $request->wasPosted() ) {
 922                         # These fields need to be checked for encoding.
 923                         # Also remove trailing whitespace, but don't remove _initial_
 924                         # whitespace from the text boxes. This may be significant formatting.
 925                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 926                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 927                                 // Skip this if wpTextbox2 has input, it indicates that we came
 928                                 // from a conflict page with raw page text, not a custom form
 929                                 // modified by subclasses
 930                                 $textbox1 = $this->importContentFormData( $request );
 931                                 if ( $textbox1 !== null ) {
 932                                         $this->textbox1 = $textbox1;
 933                                 }
 934                         }
 935
 936                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 937
 938                         $this->summary = $request->getText( 'wpSummary' );
 939
 940                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 941                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 942                         # section titles.
 943                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 944
 945                         # Treat sectiontitle the same way as summary.
 946                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 947                         # currently doing double duty as both edit summary and section title. Right now this
 948                         # is just to allow API edits to work around this limitation, but this should be
 949                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 950                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 951                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 952
 953                         $this->edittime = $request->getVal( 'wpEdittime' );
 954                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 955                         $this->starttime = $request->getVal( 'wpStarttime' );
 956
 957                         $undidRev = $request->getInt( 'wpUndidRevision' );
 958                         if ( $undidRev ) {
 959                                 $this->undidRev = $undidRev;
 960                         }
 961
 962                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 963
 964                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 965                                 // wpTextbox1 field is missing, possibly due to being "too big"
 966                                 // according to some filter rules such as Suhosin's setting for
 967                                 // suhosin.request.max_value_length (d'oh)
 968                                 $this->incompleteForm = true;
 969                         } else {
 970                                 // If we receive the last parameter of the request, we can fairly
 971                                 // claim the POST request has not been truncated.
 972
 973                                 // TODO: softened the check for cutover.  Once we determine
 974                                 // that it is safe, we should complete the transition by
 975                                 // removing the "edittime" clause.
 976                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 977                                         && is_null( $this->edittime ) );
 978                         }
 979                         if ( $this->incompleteForm ) {
 980                                 # If the form is incomplete, force to preview.
 981                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 982                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 983                                 $this->preview = true;
 984                         } else {
 985                                 $this->preview = $request->getCheck( 'wpPreview' );
 986                                 $this->diff = $request->getCheck( 'wpDiff' );
 987
 988                                 // Remember whether a save was requested, so we can indicate
 989                                 // if we forced preview due to session failure.
 990                                 $this->mTriedSave = !$this->preview;
 991
 992                                 if ( $this->tokenOk( $request ) ) {
 993                                         # Some browsers will not report any submit button
 994                                         # if the user hits enter in the comment box.
 995                                         # The unmarked state will be assumed to be a save,
 996                                         # if the form seems otherwise complete.
 997                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 998                                 } elseif ( $this->diff ) {
 999                                         # Failed token check, but only requested "Show Changes".
1000                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
1001                                 } else {
1002                                         # Page might be a hack attempt posted from
1003                                         # an external site. Preview instead of saving.
1004                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
1005                                         $this->preview = true;
1006                                 }
1007                         }
1008                         $this->save = !$this->preview && !$this->diff;
1009                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
1010                                 $this->edittime = null;
1011                         }
1012
1013                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
1014                                 $this->starttime = null;
1015                         }
1016
1017                         $this->recreate = $request->getCheck( 'wpRecreate' );
1018
1019                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
1020                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
1021
1022                         $user = $this->context->getUser();
1023                         # Don't force edit summaries when a user is editing their own user or talk page
1024                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
1025                                 && $this->mTitle->getText() == $user->getName()
1026                         ) {
1027                                 $this->allowBlankSummary = true;
1028                         } else {
1029                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
1030                                         || !$user->getOption( 'forceeditsummary' );
1031                         }
1032
1033                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1034
1035                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1036                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1037
1038                         $changeTags = $request->getVal( 'wpChangeTags' );
1039                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1040                                 $this->changeTags = [];
1041                         } else {
1042                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1043                                         $changeTags ) ) );
1044                         }
1045                 } else {
1046                         # Not a posted form? Start with nothing.
1047                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1048                         $this->textbox1 = '';
1049                         $this->summary = '';
1050                         $this->sectiontitle = '';
1051                         $this->edittime = '';
1052                         $this->editRevId = null;
1053                         $this->starttime = wfTimestampNow();
1054                         $this->edit = false;
1055                         $this->preview = false;
1056                         $this->save = false;
1057                         $this->diff = false;
1058                         $this->minoredit = false;
1059                         // Watch may be overridden by request parameters
1060                         $this->watchthis = $request->getBool( 'watchthis', false );
1061                         $this->recreate = false;
1062
1063                         // When creating a new section, we can preload a section title by passing it as the
1064                         // preloadtitle parameter in the URL (T15100)
1065                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1066                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1067                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1068                                 $this->summary = $request->getVal( 'preloadtitle' );
1069                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1070                                 $this->summary = $request->getText( 'summary' );
1071                                 if ( $this->summary !== '' ) {
1072                                         $this->hasPresetSummary = true;
1073                                 }
1074                         }
1075
1076                         if ( $request->getVal( 'minor' ) ) {
1077                                 $this->minoredit = true;
1078                         }
1079                 }
1080
1081                 $this->oldid = $request->getInt( 'oldid' );
1082                 $this->parentRevId = $request->getInt( 'parentRevId' );
1083
1084                 $this->bot = $request->getBool( 'bot', true );
1085                 $this->nosummary = $request->getBool( 'nosummary' );
1086
1087                 // May be overridden by revision.
1088                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1089                 // May be overridden by revision.
1090                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1091
1092                 try {
1093                         $handler = ContentHandler::getForModelID( $this->contentModel );
1094                 } catch ( MWUnknownContentModelException $e ) {
1095                         throw new ErrorPageError(
1096                                 'editpage-invalidcontentmodel-title',
1097                                 'editpage-invalidcontentmodel-text',
1098                                 [ wfEscapeWikiText( $this->contentModel ) ]
1099                         );
1100                 }
1101
1102                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1103                         throw new ErrorPageError(
1104                                 'editpage-notsupportedcontentformat-title',
1105                                 'editpage-notsupportedcontentformat-text',
1106                                 [
1107                                         wfEscapeWikiText( $this->contentFormat ),
1108                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1109                                 ]
1110                         );
1111                 }
1112
1113                 /**
1114                  * @todo Check if the desired model is allowed in this namespace, and if
1115                  *   a transition from the page's current model to the new model is
1116                  *   allowed.
1117                  */
1118
1119                 $this->editintro = $request->getText( 'editintro',
1120                         // Custom edit intro for new sections
1121                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1122
1123                 // Allow extensions to modify form data
1124                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1125         }
1126
1127         /**
1128          * Subpage overridable method for extracting the page content data from the
1129          * posted form to be placed in $this->textbox1, if using customized input
1130          * this method should be overridden and return the page text that will be used
1131          * for saving, preview parsing and so on...
1132          *
1133          * @param WebRequest &$request
1134          * @return string|null
1135          */
1136         protected function importContentFormData( &$request ) {
1137                 return; // Don't do anything, EditPage already extracted wpTextbox1
1138         }
1139
1140         /**
1141          * Initialise form fields in the object
1142          * Called on the first invocation, e.g. when a user clicks an edit link
1143          * @return bool If the requested section is valid
1144          */
1145         public function initialiseForm() {
1146                 $this->edittime = $this->page->getTimestamp();
1147                 $this->editRevId = $this->page->getLatest();
1148
1149                 $content = $this->getContentObject( false ); # TODO: track content object?!
1150                 if ( $content === false ) {
1151                         return false;
1152                 }
1153                 $this->textbox1 = $this->toEditText( $content );
1154
1155                 $user = $this->context->getUser();
1156                 // activate checkboxes if user wants them to be always active
1157                 # Sort out the "watch" checkbox
1158                 if ( $user->getOption( 'watchdefault' ) ) {
1159                         # Watch all edits
1160                         $this->watchthis = true;
1161                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1162                         # Watch creations
1163                         $this->watchthis = true;
1164                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1165                         # Already watched
1166                         $this->watchthis = true;
1167                 }
1168                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1169                         $this->minoredit = true;
1170                 }
1171                 if ( $this->textbox1 === false ) {
1172                         return false;
1173                 }
1174                 return true;
1175         }
1176
1177         /**
1178          * @param Content|null $def_content The default value to return
1179          *
1180          * @return Content|null Content on success, $def_content for invalid sections
1181          *
1182          * @since 1.21
1183          */
1184         protected function getContentObject( $def_content = null ) {
1185                 global $wgContLang;
1186
1187                 $content = false;
1188
1189                 $user = $this->context->getUser();
1190                 $request = $this->context->getRequest();
1191                 // For message page not locally set, use the i18n message.
1192                 // For other non-existent articles, use preload text if any.
1193                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1194                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1195                                 # If this is a system message, get the default text.
1196                                 $msg = $this->mTitle->getDefaultMessageText();
1197
1198                                 $content = $this->toEditContent( $msg );
1199                         }
1200                         if ( $content === false ) {
1201                                 # If requested, preload some text.
1202                                 $preload = $request->getVal( 'preload',
1203                                         // Custom preload text for new sections
1204                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1205                                 $params = $request->getArray( 'preloadparams', [] );
1206
1207                                 $content = $this->getPreloadedContent( $preload, $params );
1208                         }
1209                 // For existing pages, get text based on "undo" or section parameters.
1210                 } else {
1211                         if ( $this->section != '' ) {
1212                                 // Get section edit text (returns $def_text for invalid sections)
1213                                 $orig = $this->getOriginalContent( $user );
1214                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1215
1216                                 if ( !$content ) {
1217                                         $content = $def_content;
1218                                 }
1219                         } else {
1220                                 $undoafter = $request->getInt( 'undoafter' );
1221                                 $undo = $request->getInt( 'undo' );
1222
1223                                 if ( $undo > 0 && $undoafter > 0 ) {
1224                                         $undorev = Revision::newFromId( $undo );
1225                                         $oldrev = Revision::newFromId( $undoafter );
1226
1227                                         # Sanity check, make sure it's the right page,
1228                                         # the revisions exist and they were not deleted.
1229                                         # Otherwise, $content will be left as-is.
1230                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1231                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1232                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1233                                         ) {
1234                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1235
1236                                                 if ( $content === false ) {
1237                                                         # Warn the user that something went wrong
1238                                                         $undoMsg = 'failure';
1239                                                 } else {
1240                                                         $oldContent = $this->page->getContent( Revision::RAW );
1241                                                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1242                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1243                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1244                                                                 // The undo may change content
1245                                                                 // model if its reverting the top
1246                                                                 // edit. This can result in
1247                                                                 // mismatched content model/format.
1248                                                                 $this->contentModel = $newContent->getModel();
1249                                                                 $this->contentFormat = $oldrev->getContentFormat();
1250                                                         }
1251
1252                                                         if ( $newContent->equals( $oldContent ) ) {
1253                                                                 # Tell the user that the undo results in no change,
1254                                                                 # i.e. the revisions were already undone.
1255                                                                 $undoMsg = 'nochange';
1256                                                                 $content = false;
1257                                                         } else {
1258                                                                 # Inform the user of our success and set an automatic edit summary
1259                                                                 $undoMsg = 'success';
1260
1261                                                                 # If we just undid one rev, use an autosummary
1262                                                                 $firstrev = $oldrev->getNext();
1263                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1264                                                                         $userText = $undorev->getUserText();
1265                                                                         if ( $userText === '' ) {
1266                                                                                 $undoSummary = $this->context->msg(
1267                                                                                         'undo-summary-username-hidden',
1268                                                                                         $undo
1269                                                                                 )->inContentLanguage()->text();
1270                                                                         } else {
1271                                                                                 $undoSummary = $this->context->msg(
1272                                                                                         'undo-summary',
1273                                                                                         $undo,
1274                                                                                         $userText
1275                                                                                 )->inContentLanguage()->text();
1276                                                                         }
1277                                                                         if ( $this->summary === '' ) {
1278                                                                                 $this->summary = $undoSummary;
1279                                                                         } else {
1280                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1281                                                                                         ->inContentLanguage()->text() . $this->summary;
1282                                                                         }
1283                                                                         $this->undidRev = $undo;
1284                                                                 }
1285                                                                 $this->formtype = 'diff';
1286                                                         }
1287                                                 }
1288                                         } else {
1289                                                 // Failed basic sanity checks.
1290                                                 // Older revisions may have been removed since the link
1291                                                 // was created, or we may simply have got bogus input.
1292                                                 $undoMsg = 'norev';
1293                                         }
1294
1295                                         $out = $this->context->getOutput();
1296                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1297                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1298                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1299                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1300                                 }
1301
1302                                 if ( $content === false ) {
1303                                         $content = $this->getOriginalContent( $user );
1304                                 }
1305                         }
1306                 }
1307
1308                 return $content;
1309         }
1310
1311         /**
1312          * Get the content of the wanted revision, without section extraction.
1313          *
1314          * The result of this function can be used to compare user's input with
1315          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1316          * to the original text of the edit.
1317          *
1318          * This differs from Article::getContent() that when a missing revision is
1319          * encountered the result will be null and not the
1320          * 'missing-revision' message.
1321          *
1322          * @since 1.19
1323          * @param User $user The user to get the revision for
1324          * @return Content|null
1325          */
1326         private function getOriginalContent( User $user ) {
1327                 if ( $this->section == 'new' ) {
1328                         return $this->getCurrentContent();
1329                 }
1330                 $revision = $this->mArticle->getRevisionFetched();
1331                 if ( $revision === null ) {
1332                         $handler = ContentHandler::getForModelID( $this->contentModel );
1333                         return $handler->makeEmptyContent();
1334                 }
1335                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1336                 return $content;
1337         }
1338
1339         /**
1340          * Get the edit's parent revision ID
1341          *
1342          * The "parent" revision is the ancestor that should be recorded in this
1343          * page's revision history.  It is either the revision ID of the in-memory
1344          * article content, or in the case of a 3-way merge in order to rebase
1345          * across a recoverable edit conflict, the ID of the newer revision to
1346          * which we have rebased this page.
1347          *
1348          * @since 1.27
1349          * @return int Revision ID
1350          */
1351         public function getParentRevId() {
1352                 if ( $this->parentRevId ) {
1353                         return $this->parentRevId;
1354                 } else {
1355                         return $this->mArticle->getRevIdFetched();
1356                 }
1357         }
1358
1359         /**
1360          * Get the current content of the page. This is basically similar to
1361          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1362          * content object is returned instead of null.
1363          *
1364          * @since 1.21
1365          * @return Content
1366          */
1367         protected function getCurrentContent() {
1368                 $rev = $this->page->getRevision();
1369                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1370
1371                 if ( $content === false || $content === null ) {
1372                         $handler = ContentHandler::getForModelID( $this->contentModel );
1373                         return $handler->makeEmptyContent();
1374                 } elseif ( !$this->undidRev ) {
1375                         // Content models should always be the same since we error
1376                         // out if they are different before this point (in ->edit()).
1377                         // The exception being, during an undo, the current revision might
1378                         // differ from the prior revision.
1379                         $logger = LoggerFactory::getInstance( 'editpage' );
1380                         if ( $this->contentModel !== $rev->getContentModel() ) {
1381                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1382                                         'prev' => $this->contentModel,
1383                                         'new' => $rev->getContentModel(),
1384                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1385                                         'method' => __METHOD__
1386                                 ] );
1387                                 $this->contentModel = $rev->getContentModel();
1388                         }
1389
1390                         // Given that the content models should match, the current selected
1391                         // format should be supported.
1392                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1393                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1394
1395                                         'prev' => $this->contentFormat,
1396                                         'new' => $rev->getContentFormat(),
1397                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1398                                         'method' => __METHOD__
1399                                 ] );
1400                                 $this->contentFormat = $rev->getContentFormat();
1401                         }
1402                 }
1403                 return $content;
1404         }
1405
1406         /**
1407          * Use this method before edit() to preload some content into the edit box
1408          *
1409          * @param Content $content
1410          *
1411          * @since 1.21
1412          */
1413         public function setPreloadedContent( Content $content ) {
1414                 $this->mPreloadContent = $content;
1415         }
1416
1417         /**
1418          * Get the contents to be preloaded into the box, either set by
1419          * an earlier setPreloadText() or by loading the given page.
1420          *
1421          * @param string $preload Representing the title to preload from.
1422          * @param array $params Parameters to use (interface-message style) in the preloaded text
1423          *
1424          * @return Content
1425          *
1426          * @since 1.21
1427          */
1428         protected function getPreloadedContent( $preload, $params = [] ) {
1429                 if ( !empty( $this->mPreloadContent ) ) {
1430                         return $this->mPreloadContent;
1431                 }
1432
1433                 $handler = ContentHandler::getForModelID( $this->contentModel );
1434
1435                 if ( $preload === '' ) {
1436                         return $handler->makeEmptyContent();
1437                 }
1438
1439                 $user = $this->context->getUser();
1440                 $title = Title::newFromText( $preload );
1441                 # Check for existence to avoid getting MediaWiki:Noarticletext
1442                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1443                         // TODO: somehow show a warning to the user!
1444                         return $handler->makeEmptyContent();
1445                 }
1446
1447                 $page = WikiPage::factory( $title );
1448                 if ( $page->isRedirect() ) {
1449                         $title = $page->getRedirectTarget();
1450                         # Same as before
1451                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1452                                 // TODO: somehow show a warning to the user!
1453                                 return $handler->makeEmptyContent();
1454                         }
1455                         $page = WikiPage::factory( $title );
1456                 }
1457
1458                 $parserOptions = ParserOptions::newFromUser( $user );
1459                 $content = $page->getContent( Revision::RAW );
1460
1461                 if ( !$content ) {
1462                         // TODO: somehow show a warning to the user!
1463                         return $handler->makeEmptyContent();
1464                 }
1465
1466                 if ( $content->getModel() !== $handler->getModelID() ) {
1467                         $converted = $content->convert( $handler->getModelID() );
1468
1469                         if ( !$converted ) {
1470                                 // TODO: somehow show a warning to the user!
1471                                 wfDebug( "Attempt to preload incompatible content: " .
1472                                         "can't convert " . $content->getModel() .
1473                                         " to " . $handler->getModelID() );
1474
1475                                 return $handler->makeEmptyContent();
1476                         }
1477
1478                         $content = $converted;
1479                 }
1480
1481                 return $content->preloadTransform( $title, $parserOptions, $params );
1482         }
1483
1484         /**
1485          * Make sure the form isn't faking a user's credentials.
1486          *
1487          * @param WebRequest &$request
1488          * @return bool
1489          * @private
1490          */
1491         public function tokenOk( &$request ) {
1492                 $token = $request->getVal( 'wpEditToken' );
1493                 $user = $this->context->getUser();
1494                 $this->mTokenOk = $user->matchEditToken( $token );
1495                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1496                 return $this->mTokenOk;
1497         }
1498
1499         /**
1500          * Sets post-edit cookie indicating the user just saved a particular revision.
1501          *
1502          * This uses a temporary cookie for each revision ID so separate saves will never
1503          * interfere with each other.
1504          *
1505          * Article::view deletes the cookie on server-side after the redirect and
1506          * converts the value to the global JavaScript variable wgPostEdit.
1507          *
1508          * If the variable were set on the server, it would be cached, which is unwanted
1509          * since the post-edit state should only apply to the load right after the save.
1510          *
1511          * @param int $statusValue The status value (to check for new article status)
1512          */
1513         protected function setPostEditCookie( $statusValue ) {
1514                 $revisionId = $this->page->getLatest();
1515                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1516
1517                 $val = 'saved';
1518                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1519                         $val = 'created';
1520                 } elseif ( $this->oldid ) {
1521                         $val = 'restored';
1522                 }
1523
1524                 $response = $this->context->getRequest()->response();
1525                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1526         }
1527
1528         /**
1529          * Attempt submission
1530          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1531          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1532          * @return Status The resulting status object.
1533          */
1534         public function attemptSave( &$resultDetails = false ) {
1535                 # Allow bots to exempt some edits from bot flagging
1536                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1537                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1538
1539                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1540
1541                 return $status;
1542         }
1543
1544         /**
1545          * Log when a page was successfully saved after the edit conflict view
1546          */
1547         private function incrementResolvedConflicts() {
1548                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1549                         return;
1550                 }
1551
1552                 $this->getEditConflictHelper()->incrementResolvedStats();
1553         }
1554
1555         /**
1556          * Handle status, such as after attempt save
1557          *
1558          * @param Status $status
1559          * @param array|bool $resultDetails
1560          *
1561          * @throws ErrorPageError
1562          * @return bool False, if output is done, true if rest of the form should be displayed
1563          */
1564         private function handleStatus( Status $status, $resultDetails ) {
1565                 /**
1566                  * @todo FIXME: once the interface for internalAttemptSave() is made
1567                  *   nicer, this should use the message in $status
1568                  */
1569                 if ( $status->value == self::AS_SUCCESS_UPDATE
1570                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1571                 ) {
1572                         $this->incrementResolvedConflicts();
1573
1574                         $this->didSave = true;
1575                         if ( !$resultDetails['nullEdit'] ) {
1576                                 $this->setPostEditCookie( $status->value );
1577                         }
1578                 }
1579
1580                 $out = $this->context->getOutput();
1581
1582                 // "wpExtraQueryRedirect" is a hidden input to modify
1583                 // after save URL and is not used by actual edit form
1584                 $request = $this->context->getRequest();
1585                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1586
1587                 switch ( $status->value ) {
1588                         case self::AS_HOOK_ERROR_EXPECTED:
1589                         case self::AS_CONTENT_TOO_BIG:
1590                         case self::AS_ARTICLE_WAS_DELETED:
1591                         case self::AS_CONFLICT_DETECTED:
1592                         case self::AS_SUMMARY_NEEDED:
1593                         case self::AS_TEXTBOX_EMPTY:
1594                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1595                         case self::AS_END:
1596                         case self::AS_BLANK_ARTICLE:
1597                         case self::AS_SELF_REDIRECT:
1598                                 return true;
1599
1600                         case self::AS_HOOK_ERROR:
1601                                 return false;
1602
1603                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1604                         case self::AS_PARSE_ERROR:
1605                         case self::AS_UNICODE_NOT_SUPPORTED:
1606                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1607                                 return true;
1608
1609                         case self::AS_SUCCESS_NEW_ARTICLE:
1610                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1611                                 if ( $extraQueryRedirect ) {
1612                                         if ( $query === '' ) {
1613                                                 $query = $extraQueryRedirect;
1614                                         } else {
1615                                                 $query = $query . '&' . $extraQueryRedirect;
1616                                         }
1617                                 }
1618                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1619                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1620                                 return false;
1621
1622                         case self::AS_SUCCESS_UPDATE:
1623                                 $extraQuery = '';
1624                                 $sectionanchor = $resultDetails['sectionanchor'];
1625
1626                                 // Give extensions a chance to modify URL query on update
1627                                 Hooks::run(
1628                                         'ArticleUpdateBeforeRedirect',
1629                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1630                                 );
1631
1632                                 if ( $resultDetails['redirect'] ) {
1633                                         if ( $extraQuery == '' ) {
1634                                                 $extraQuery = 'redirect=no';
1635                                         } else {
1636                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1637                                         }
1638                                 }
1639                                 if ( $extraQueryRedirect ) {
1640                                         if ( $extraQuery === '' ) {
1641                                                 $extraQuery = $extraQueryRedirect;
1642                                         } else {
1643                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1644                                         }
1645                                 }
1646
1647                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1648                                 return false;
1649
1650                         case self::AS_SPAM_ERROR:
1651                                 $this->spamPageWithContent( $resultDetails['spam'] );
1652                                 return false;
1653
1654                         case self::AS_BLOCKED_PAGE_FOR_USER:
1655                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1656
1657                         case self::AS_IMAGE_REDIRECT_ANON:
1658                         case self::AS_IMAGE_REDIRECT_LOGGED:
1659                                 throw new PermissionsError( 'upload' );
1660
1661                         case self::AS_READ_ONLY_PAGE_ANON:
1662                         case self::AS_READ_ONLY_PAGE_LOGGED:
1663                                 throw new PermissionsError( 'edit' );
1664
1665                         case self::AS_READ_ONLY_PAGE:
1666                                 throw new ReadOnlyError;
1667
1668                         case self::AS_RATE_LIMITED:
1669                                 throw new ThrottledError();
1670
1671                         case self::AS_NO_CREATE_PERMISSION:
1672                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1673                                 throw new PermissionsError( $permission );
1674
1675                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1676                                 throw new PermissionsError( 'editcontentmodel' );
1677
1678                         default:
1679                                 // We don't recognize $status->value. The only way that can happen
1680                                 // is if an extension hook aborted from inside ArticleSave.
1681                                 // Render the status object into $this->hookError
1682                                 // FIXME this sucks, we should just use the Status object throughout
1683                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1684                                         '</div>';
1685                                 return true;
1686                 }
1687         }
1688
1689         /**
1690          * Run hooks that can filter edits just before they get saved.
1691          *
1692          * @param Content $content The Content to filter.
1693          * @param Status $status For reporting the outcome to the caller
1694          * @param User $user The user performing the edit
1695          *
1696          * @return bool
1697          */
1698         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1699                 // Run old style post-section-merge edit filter
1700                 if ( $this->hookError != '' ) {
1701                         # ...or the hook could be expecting us to produce an error
1702                         $status->fatal( 'hookaborted' );
1703                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1704                         return false;
1705                 }
1706
1707                 // Run new style post-section-merge edit filter
1708                 if ( !Hooks::run( 'EditFilterMergedContent',
1709                                 [ $this->context, $content, $status, $this->summary,
1710                                 $user, $this->minoredit ] )
1711                 ) {
1712                         # Error messages etc. could be handled within the hook...
1713                         if ( $status->isGood() ) {
1714                                 $status->fatal( 'hookaborted' );
1715                                 // Not setting $this->hookError here is a hack to allow the hook
1716                                 // to cause a return to the edit page without $this->hookError
1717                                 // being set. This is used by ConfirmEdit to display a captcha
1718                                 // without any error message cruft.
1719                         } else {
1720                                 $this->hookError = $this->formatStatusErrors( $status );
1721                         }
1722                         // Use the existing $status->value if the hook set it
1723                         if ( !$status->value ) {
1724                                 $status->value = self::AS_HOOK_ERROR;
1725                         }
1726                         return false;
1727                 } elseif ( !$status->isOK() ) {
1728                         # ...or the hook could be expecting us to produce an error
1729                         // FIXME this sucks, we should just use the Status object throughout
1730                         $this->hookError = $this->formatStatusErrors( $status );
1731                         $status->fatal( 'hookaborted' );
1732                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1733                         return false;
1734                 }
1735
1736                 return true;
1737         }
1738
1739         /**
1740          * Wrap status errors in an errorbox for increased visiblity
1741          *
1742          * @param Status $status
1743          * @return string Wikitext
1744          */
1745         private function formatStatusErrors( Status $status ) {
1746                 $errmsg = $status->getWikiText(
1747                         'edit-error-short',
1748                         'edit-error-long',
1749                         $this->context->getLanguage()
1750                 );
1751                 return <<<ERROR
1752 <div class="errorbox">
1753 {$errmsg}
1754 </div>
1755 <br clear="all" />
1756 ERROR;
1757         }
1758
1759         /**
1760          * Return the summary to be used for a new section.
1761          *
1762          * @param string $sectionanchor Set to the section anchor text
1763          * @return string
1764          */
1765         private function newSectionSummary( &$sectionanchor = null ) {
1766                 global $wgParser;
1767
1768                 if ( $this->sectiontitle !== '' ) {
1769                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1770                         // If no edit summary was specified, create one automatically from the section
1771                         // title and have it link to the new section. Otherwise, respect the summary as
1772                         // passed.
1773                         if ( $this->summary === '' ) {
1774                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1775                                 return $this->context->msg( 'newsectionsummary' )
1776                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1777                         }
1778                 } elseif ( $this->summary !== '' ) {
1779                         $sectionanchor = $this->guessSectionName( $this->summary );
1780                         # This is a new section, so create a link to the new section
1781                         # in the revision summary.
1782                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1783                         return $this->context->msg( 'newsectionsummary' )
1784                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1785                 }
1786                 return $this->summary;
1787         }
1788
1789         /**
1790          * Attempt submission (no UI)
1791          *
1792          * @param array &$result Array to add statuses to, currently with the
1793          *   possible keys:
1794          *   - spam (string): Spam string from content if any spam is detected by
1795          *     matchSpamRegex.
1796          *   - sectionanchor (string): Section anchor for a section save.
1797          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1798          *     false otherwise.
1799          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1800          *     revision is a redirect.
1801          * @param bool $bot True if edit is being made under the bot right.
1802          *
1803          * @return Status Status object, possibly with a message, but always with
1804          *   one of the AS_* constants in $status->value,
1805          *
1806          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1807          *   various error display idiosyncrasies. There are also lots of cases
1808          *   where error metadata is set in the object and retrieved later instead
1809          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1810          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1811          * time.
1812          */
1813         public function internalAttemptSave( &$result, $bot = false ) {
1814                 $status = Status::newGood();
1815                 $user = $this->context->getUser();
1816
1817                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1818                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1819                         $status->fatal( 'hookaborted' );
1820                         $status->value = self::AS_HOOK_ERROR;
1821                         return $status;
1822                 }
1823
1824                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1825                         $status->fatal( 'unicode-support-fail' );
1826                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1827                         return $status;
1828                 }
1829
1830                 $request = $this->context->getRequest();
1831                 $spam = $request->getText( 'wpAntispam' );
1832                 if ( $spam !== '' ) {
1833                         wfDebugLog(
1834                                 'SimpleAntiSpam',
1835                                 $user->getName() .
1836                                 ' editing "' .
1837                                 $this->mTitle->getPrefixedText() .
1838                                 '" submitted bogus field "' .
1839                                 $spam .
1840                                 '"'
1841                         );
1842                         $status->fatal( 'spamprotectionmatch', false );
1843                         $status->value = self::AS_SPAM_ERROR;
1844                         return $status;
1845                 }
1846
1847                 try {
1848                         # Construct Content object
1849                         $textbox_content = $this->toEditContent( $this->textbox1 );
1850                 } catch ( MWContentSerializationException $ex ) {
1851                         $status->fatal(
1852                                 'content-failed-to-parse',
1853                                 $this->contentModel,
1854                                 $this->contentFormat,
1855                                 $ex->getMessage()
1856                         );
1857                         $status->value = self::AS_PARSE_ERROR;
1858                         return $status;
1859                 }
1860
1861                 # Check image redirect
1862                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1863                         $textbox_content->isRedirect() &&
1864                         !$user->isAllowed( 'upload' )
1865                 ) {
1866                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1867                                 $status->setResult( false, $code );
1868
1869                                 return $status;
1870                 }
1871
1872                 # Check for spam
1873                 $match = self::matchSummarySpamRegex( $this->summary );
1874                 if ( $match === false && $this->section == 'new' ) {
1875                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1876                         # regular summaries, it is added to the actual wikitext.
1877                         if ( $this->sectiontitle !== '' ) {
1878                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1879                                 $match = self::matchSpamRegex( $this->sectiontitle );
1880                         } else {
1881                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1882                                 # is used with the 'summary' parameter.
1883                                 $match = self::matchSpamRegex( $this->summary );
1884                         }
1885                 }
1886                 if ( $match === false ) {
1887                         $match = self::matchSpamRegex( $this->textbox1 );
1888                 }
1889                 if ( $match !== false ) {
1890                         $result['spam'] = $match;
1891                         $ip = $request->getIP();
1892                         $pdbk = $this->mTitle->getPrefixedDBkey();
1893                         $match = str_replace( "\n", '', $match );
1894                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1895                         $status->fatal( 'spamprotectionmatch', $match );
1896                         $status->value = self::AS_SPAM_ERROR;
1897                         return $status;
1898                 }
1899                 if ( !Hooks::run(
1900                         'EditFilter',
1901                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1902                 ) {
1903                         # Error messages etc. could be handled within the hook...
1904                         $status->fatal( 'hookaborted' );
1905                         $status->value = self::AS_HOOK_ERROR;
1906                         return $status;
1907                 } elseif ( $this->hookError != '' ) {
1908                         # ...or the hook could be expecting us to produce an error
1909                         $status->fatal( 'hookaborted' );
1910                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1911                         return $status;
1912                 }
1913
1914                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1915                         // Auto-block user's IP if the account was "hard" blocked
1916                         if ( !wfReadOnly() ) {
1917                                 $user->spreadAnyEditBlock();
1918                         }
1919                         # Check block state against master, thus 'false'.
1920                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1921                         return $status;
1922                 }
1923
1924                 $this->contentLength = strlen( $this->textbox1 );
1925                 $config = $this->context->getConfig();
1926                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1927                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1928                         // Error will be displayed by showEditForm()
1929                         $this->tooBig = true;
1930                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1931                         return $status;
1932                 }
1933
1934                 if ( !$user->isAllowed( 'edit' ) ) {
1935                         if ( $user->isAnon() ) {
1936                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1937                                 return $status;
1938                         } else {
1939                                 $status->fatal( 'readonlytext' );
1940                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1941                                 return $status;
1942                         }
1943                 }
1944
1945                 $changingContentModel = false;
1946                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1947                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
1948                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1949                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1950                                 return $status;
1951                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1952                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1953                                 return $status;
1954                         }
1955                         // Make sure the user can edit the page under the new content model too
1956                         $titleWithNewContentModel = clone $this->mTitle;
1957                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1958                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1959                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1960                         ) {
1961                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1962                                 return $status;
1963                         }
1964
1965                         $changingContentModel = true;
1966                         $oldContentModel = $this->mTitle->getContentModel();
1967                 }
1968
1969                 if ( $this->changeTags ) {
1970                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1971                                 $this->changeTags, $user );
1972                         if ( !$changeTagsStatus->isOK() ) {
1973                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1974                                 return $changeTagsStatus;
1975                         }
1976                 }
1977
1978                 if ( wfReadOnly() ) {
1979                         $status->fatal( 'readonlytext' );
1980                         $status->value = self::AS_READ_ONLY_PAGE;
1981                         return $status;
1982                 }
1983                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1984                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1985                 ) {
1986                         $status->fatal( 'actionthrottledtext' );
1987                         $status->value = self::AS_RATE_LIMITED;
1988                         return $status;
1989                 }
1990
1991                 # If the article has been deleted while editing, don't save it without
1992                 # confirmation
1993                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1994                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1995                         return $status;
1996                 }
1997
1998                 # Load the page data from the master. If anything changes in the meantime,
1999                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
2000                 $this->page->loadPageData( 'fromdbmaster' );
2001                 $new = !$this->page->exists();
2002
2003                 if ( $new ) {
2004                         // Late check for create permission, just in case *PARANOIA*
2005                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
2006                                 $status->fatal( 'nocreatetext' );
2007                                 $status->value = self::AS_NO_CREATE_PERMISSION;
2008                                 wfDebug( __METHOD__ . ": no create permission\n" );
2009                                 return $status;
2010                         }
2011
2012                         // Don't save a new page if it's blank or if it's a MediaWiki:
2013                         // message with content equivalent to default (allow empty pages
2014                         // in this case to disable messages, see T52124)
2015                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
2016                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
2017                                 $defaultText = $defaultMessageText;
2018                         } else {
2019                                 $defaultText = '';
2020                         }
2021
2022                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
2023                                 $this->blankArticle = true;
2024                                 $status->fatal( 'blankarticle' );
2025                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
2026                                 return $status;
2027                         }
2028
2029                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
2030                                 return $status;
2031                         }
2032
2033                         $content = $textbox_content;
2034
2035                         $result['sectionanchor'] = '';
2036                         if ( $this->section == 'new' ) {
2037                                 if ( $this->sectiontitle !== '' ) {
2038                                         // Insert the section title above the content.
2039                                         $content = $content->addSectionHeader( $this->sectiontitle );
2040                                 } elseif ( $this->summary !== '' ) {
2041                                         // Insert the section title above the content.
2042                                         $content = $content->addSectionHeader( $this->summary );
2043                                 }
2044                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2045                         }
2046
2047                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2048
2049                 } else { # not $new
2050
2051                         # Article exists. Check for edit conflict.
2052
2053                         $this->page->clear(); # Force reload of dates, etc.
2054                         $timestamp = $this->page->getTimestamp();
2055                         $latest = $this->page->getLatest();
2056
2057                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2058
2059                         // Check editRevId if set, which handles same-second timestamp collisions
2060                         if ( $timestamp != $this->edittime
2061                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2062                         ) {
2063                                 $this->isConflict = true;
2064                                 if ( $this->section == 'new' ) {
2065                                         if ( $this->page->getUserText() == $user->getName() &&
2066                                                 $this->page->getComment() == $this->newSectionSummary()
2067                                         ) {
2068                                                 // Probably a duplicate submission of a new comment.
2069                                                 // This can happen when CDN resends a request after
2070                                                 // a timeout but the first one actually went through.
2071                                                 wfDebug( __METHOD__
2072                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2073                                         } else {
2074                                                 // New comment; suppress conflict.
2075                                                 $this->isConflict = false;
2076                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2077                                         }
2078                                 } elseif ( $this->section == ''
2079                                         && Revision::userWasLastToEdit(
2080                                                 DB_MASTER, $this->mTitle->getArticleID(),
2081                                                 $user->getId(), $this->edittime
2082                                         )
2083                                 ) {
2084                                         # Suppress edit conflict with self, except for section edits where merging is required.
2085                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2086                                         $this->isConflict = false;
2087                                 }
2088                         }
2089
2090                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2091                         if ( $this->sectiontitle !== '' ) {
2092                                 $sectionTitle = $this->sectiontitle;
2093                         } else {
2094                                 $sectionTitle = $this->summary;
2095                         }
2096
2097                         $content = null;
2098
2099                         if ( $this->isConflict ) {
2100                                 wfDebug( __METHOD__
2101                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2102                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2103                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2104                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2105                                 if ( $this->editRevId !== null ) {
2106                                         $content = $this->page->replaceSectionAtRev(
2107                                                 $this->section,
2108                                                 $textbox_content,
2109                                                 $sectionTitle,
2110                                                 $this->editRevId
2111                                         );
2112                                 } else {
2113                                         $content = $this->page->replaceSectionContent(
2114                                                 $this->section,
2115                                                 $textbox_content,
2116                                                 $sectionTitle,
2117                                                 $this->edittime
2118                                         );
2119                                 }
2120                         } else {
2121                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2122                                 $content = $this->page->replaceSectionContent(
2123                                         $this->section,
2124                                         $textbox_content,
2125                                         $sectionTitle
2126                                 );
2127                         }
2128
2129                         if ( is_null( $content ) ) {
2130                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2131                                 $this->isConflict = true;
2132                                 $content = $textbox_content; // do not try to merge here!
2133                         } elseif ( $this->isConflict ) {
2134                                 # Attempt merge
2135                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2136                                         // Successful merge! Maybe we should tell the user the good news?
2137                                         $this->isConflict = false;
2138                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2139                                 } else {
2140                                         $this->section = '';
2141                                         $this->textbox1 = ContentHandler::getContentText( $content );
2142                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2143                                 }
2144                         }
2145
2146                         if ( $this->isConflict ) {
2147                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2148                                 return $status;
2149                         }
2150
2151                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2152                                 return $status;
2153                         }
2154
2155                         if ( $this->section == 'new' ) {
2156                                 // Handle the user preference to force summaries here
2157                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2158                                         $this->missingSummary = true;
2159                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2160                                         $status->value = self::AS_SUMMARY_NEEDED;
2161                                         return $status;
2162                                 }
2163
2164                                 // Do not allow the user to post an empty comment
2165                                 if ( $this->textbox1 == '' ) {
2166                                         $this->missingComment = true;
2167                                         $status->fatal( 'missingcommenttext' );
2168                                         $status->value = self::AS_TEXTBOX_EMPTY;
2169                                         return $status;
2170                                 }
2171                         } elseif ( !$this->allowBlankSummary
2172                                 && !$content->equals( $this->getOriginalContent( $user ) )
2173                                 && !$content->isRedirect()
2174                                 && md5( $this->summary ) == $this->autoSumm
2175                         ) {
2176                                 $this->missingSummary = true;
2177                                 $status->fatal( 'missingsummary' );
2178                                 $status->value = self::AS_SUMMARY_NEEDED;
2179                                 return $status;
2180                         }
2181
2182                         # All's well
2183                         $sectionanchor = '';
2184                         if ( $this->section == 'new' ) {
2185                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2186                         } elseif ( $this->section != '' ) {
2187                                 # Try to get a section anchor from the section source, redirect
2188                                 # to edited section if header found.
2189                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2190                                 # for duplicate heading checking and maybe parsing.
2191                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2192                                 # We can't deal with anchors, includes, html etc in the header for now,
2193                                 # headline would need to be parsed to improve this.
2194                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2195                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2196                                 }
2197                         }
2198                         $result['sectionanchor'] = $sectionanchor;
2199
2200                         // Save errors may fall down to the edit form, but we've now
2201                         // merged the section into full text. Clear the section field
2202                         // so that later submission of conflict forms won't try to
2203                         // replace that into a duplicated mess.
2204                         $this->textbox1 = $this->toEditText( $content );
2205                         $this->section = '';
2206
2207                         $status->value = self::AS_SUCCESS_UPDATE;
2208                 }
2209
2210                 if ( !$this->allowSelfRedirect
2211                         && $content->isRedirect()
2212                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2213                 ) {
2214                         // If the page already redirects to itself, don't warn.
2215                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2216                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2217                                 $this->selfRedirect = true;
2218                                 $status->fatal( 'selfredirect' );
2219                                 $status->value = self::AS_SELF_REDIRECT;
2220                                 return $status;
2221                         }
2222                 }
2223
2224                 // Check for length errors again now that the section is merged in
2225                 $this->contentLength = strlen( $this->toEditText( $content ) );
2226                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2227                         $this->tooBig = true;
2228                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2229                         return $status;
2230                 }
2231
2232                 $flags = EDIT_AUTOSUMMARY |
2233                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2234                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2235                         ( $bot ? EDIT_FORCE_BOT : 0 );
2236
2237                 $doEditStatus = $this->page->doEditContent(
2238                         $content,
2239                         $this->summary,
2240                         $flags,
2241                         false,
2242                         $user,
2243                         $content->getDefaultFormat(),
2244                         $this->changeTags,
2245                         $this->undidRev
2246                 );
2247
2248                 if ( !$doEditStatus->isOK() ) {
2249                         // Failure from doEdit()
2250                         // Show the edit conflict page for certain recognized errors from doEdit(),
2251                         // but don't show it for errors from extension hooks
2252                         $errors = $doEditStatus->getErrorsArray();
2253                         if ( in_array( $errors[0][0],
2254                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2255                         ) {
2256                                 $this->isConflict = true;
2257                                 // Destroys data doEdit() put in $status->value but who cares
2258                                 $doEditStatus->value = self::AS_END;
2259                         }
2260                         return $doEditStatus;
2261                 }
2262
2263                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2264                 if ( $result['nullEdit'] ) {
2265                         // We don't know if it was a null edit until now, so increment here
2266                         $user->pingLimiter( 'linkpurge' );
2267                 }
2268                 $result['redirect'] = $content->isRedirect();
2269
2270                 $this->updateWatchlist();
2271
2272                 // If the content model changed, add a log entry
2273                 if ( $changingContentModel ) {
2274                         $this->addContentModelChangeLogEntry(
2275                                 $user,
2276                                 $new ? false : $oldContentModel,
2277                                 $this->contentModel,
2278                                 $this->summary
2279                         );
2280                 }
2281
2282                 return $status;
2283         }
2284
2285         /**
2286          * @param User $user
2287          * @param string|false $oldModel false if the page is being newly created
2288          * @param string $newModel
2289          * @param string $reason
2290          */
2291         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2292                 $new = $oldModel === false;
2293                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2294                 $log->setPerformer( $user );
2295                 $log->setTarget( $this->mTitle );
2296                 $log->setComment( $reason );
2297                 $log->setParameters( [
2298                         '4::oldmodel' => $oldModel,
2299                         '5::newmodel' => $newModel
2300                 ] );
2301                 $logid = $log->insert();
2302                 $log->publish( $logid );
2303         }
2304
2305         /**
2306          * Register the change of watch status
2307          */
2308         protected function updateWatchlist() {
2309                 $user = $this->context->getUser();
2310                 if ( !$user->isLoggedIn() ) {
2311                         return;
2312                 }
2313
2314                 $title = $this->mTitle;
2315                 $watch = $this->watchthis;
2316                 // Do this in its own transaction to reduce contention...
2317                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2318                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2319                                 return; // nothing to change
2320                         }
2321                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2322                 } );
2323         }
2324
2325         /**
2326          * Attempts to do 3-way merge of edit content with a base revision
2327          * and current content, in case of edit conflict, in whichever way appropriate
2328          * for the content type.
2329          *
2330          * @since 1.21
2331          *
2332          * @param Content $editContent
2333          *
2334          * @return bool
2335          */
2336         private function mergeChangesIntoContent( &$editContent ) {
2337                 $db = wfGetDB( DB_MASTER );
2338
2339                 // This is the revision the editor started from
2340                 $baseRevision = $this->getBaseRevision();
2341                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2342
2343                 if ( is_null( $baseContent ) ) {
2344                         return false;
2345                 }
2346
2347                 // The current state, we want to merge updates into it
2348                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2349                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2350
2351                 if ( is_null( $currentContent ) ) {
2352                         return false;
2353                 }
2354
2355                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2356
2357                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2358
2359                 if ( $result ) {
2360                         $editContent = $result;
2361                         // Update parentRevId to what we just merged.
2362                         $this->parentRevId = $currentRevision->getId();
2363                         return true;
2364                 }
2365
2366                 return false;
2367         }
2368
2369         /**
2370          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2371          *        one might think of X as the "base revision", which is NOT what this returns.
2372          * @return Revision Current version when the edit was started
2373          */
2374         public function getBaseRevision() {
2375                 if ( !$this->mBaseRevision ) {
2376                         $db = wfGetDB( DB_MASTER );
2377                         $this->mBaseRevision = $this->editRevId
2378                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2379                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2380                 }
2381                 return $this->mBaseRevision;
2382         }
2383
2384         /**
2385          * Check given input text against $wgSpamRegex, and return the text of the first match.
2386          *
2387          * @param string $text
2388          *
2389          * @return string|bool Matching string or false
2390          */
2391         public static function matchSpamRegex( $text ) {
2392                 global $wgSpamRegex;
2393                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2394                 $regexes = (array)$wgSpamRegex;
2395                 return self::matchSpamRegexInternal( $text, $regexes );
2396         }
2397
2398         /**
2399          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2400          *
2401          * @param string $text
2402          *
2403          * @return string|bool Matching string or false
2404          */
2405         public static function matchSummarySpamRegex( $text ) {
2406                 global $wgSummarySpamRegex;
2407                 $regexes = (array)$wgSummarySpamRegex;
2408                 return self::matchSpamRegexInternal( $text, $regexes );
2409         }
2410
2411         /**
2412          * @param string $text
2413          * @param array $regexes
2414          * @return bool|string
2415          */
2416         protected static function matchSpamRegexInternal( $text, $regexes ) {
2417                 foreach ( $regexes as $regex ) {
2418                         $matches = [];
2419                         if ( preg_match( $regex, $text, $matches ) ) {
2420                                 return $matches[0];
2421                         }
2422                 }
2423                 return false;
2424         }
2425
2426         public function setHeaders() {
2427                 $out = $this->context->getOutput();
2428
2429                 $out->addModules( 'mediawiki.action.edit' );
2430                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2431                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2432
2433                 $user = $this->context->getUser();
2434                 if ( $user->getOption( 'showtoolbar' ) ) {
2435                         // The addition of default buttons is handled by getEditToolbar() which
2436                         // has its own dependency on this module. The call here ensures the module
2437                         // is loaded in time (it has position "top") for other modules to register
2438                         // buttons (e.g. extensions, gadgets, user scripts).
2439                         $out->addModules( 'mediawiki.toolbar' );
2440                 }
2441
2442                 if ( $user->getOption( 'uselivepreview' ) ) {
2443                         $out->addModules( 'mediawiki.action.edit.preview' );
2444                 }
2445
2446                 if ( $user->getOption( 'useeditwarning' ) ) {
2447                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2448                 }
2449
2450                 # Enabled article-related sidebar, toplinks, etc.
2451                 $out->setArticleRelated( true );
2452
2453                 $contextTitle = $this->getContextTitle();
2454                 if ( $this->isConflict ) {
2455                         $msg = 'editconflict';
2456                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2457                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2458                 } else {
2459                         $msg = $contextTitle->exists()
2460                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2461                                         && $contextTitle->getDefaultMessageText() !== false
2462                                 )
2463                                 ? 'editing'
2464                                 : 'creating';
2465                 }
2466
2467                 # Use the title defined by DISPLAYTITLE magic word when present
2468                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2469                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2470                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2471                 if ( $displayTitle === false ) {
2472                         $displayTitle = $contextTitle->getPrefixedText();
2473                 }
2474                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2475                 # Transmit the name of the message to JavaScript for live preview
2476                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2477                 $out->addJsConfigVars( [
2478                         'wgEditMessage' => $msg,
2479                         'wgAjaxEditStash' => $this->context->getConfig()->get( 'AjaxEditStash' ),
2480                 ] );
2481         }
2482
2483         /**
2484          * Show all applicable editing introductions
2485          */
2486         protected function showIntro() {
2487                 if ( $this->suppressIntro ) {
2488                         return;
2489                 }
2490
2491                 $out = $this->context->getOutput();
2492                 $namespace = $this->mTitle->getNamespace();
2493
2494                 if ( $namespace == NS_MEDIAWIKI ) {
2495                         # Show a warning if editing an interface message
2496                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2497                         # If this is a default message (but not css or js),
2498                         # show a hint that it is translatable on translatewiki.net
2499                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2500                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2501                         ) {
2502                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2503                                 if ( $defaultMessageText !== false ) {
2504                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2505                                                 'translateinterface' );
2506                                 }
2507                         }
2508                 } elseif ( $namespace == NS_FILE ) {
2509                         # Show a hint to shared repo
2510                         $file = wfFindFile( $this->mTitle );
2511                         if ( $file && !$file->isLocal() ) {
2512                                 $descUrl = $file->getDescriptionUrl();
2513                                 # there must be a description url to show a hint to shared repo
2514                                 if ( $descUrl ) {
2515                                         if ( !$this->mTitle->exists() ) {
2516                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2517                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2518                                                 ] );
2519                                         } else {
2520                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2521                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2522                                                 ] );
2523                                         }
2524                                 }
2525                         }
2526                 }
2527
2528                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2529                 # Show log extract when the user is currently blocked
2530                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2531                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2532                         $user = User::newFromName( $username, false /* allow IP users */ );
2533                         $ip = User::isIP( $username );
2534                         $block = Block::newFromTarget( $user, $user );
2535                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2536                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2537                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2538                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2539                                 # Show log extract if the user is currently blocked
2540                                 LogEventsList::showLogExtract(
2541                                         $out,
2542                                         'block',
2543                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2544                                         '',
2545                                         [
2546                                                 'lim' => 1,
2547                                                 'showIfEmpty' => false,
2548                                                 'msgKey' => [
2549                                                         'blocked-notice-logextract',
2550                                                         $user->getName() # Support GENDER in notice
2551                                                 ]
2552                                         ]
2553                                 );
2554                         }
2555                 }
2556                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2557                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2558                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2559                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2560                         ) );
2561                         if ( $this->context->getUser()->isLoggedIn() ) {
2562                                 $out->wrapWikiMsg(
2563                                         // Suppress the external link icon, consider the help url an internal one
2564                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2565                                         [
2566                                                 'newarticletext',
2567                                                 $helpLink
2568                                         ]
2569                                 );
2570                         } else {
2571                                 $out->wrapWikiMsg(
2572                                         // Suppress the external link icon, consider the help url an internal one
2573                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2574                                         [
2575                                                 'newarticletextanon',
2576                                                 $helpLink
2577                                         ]
2578                                 );
2579                         }
2580                 }
2581                 # Give a notice if the user is editing a deleted/moved page...
2582                 if ( !$this->mTitle->exists() ) {
2583                         $dbr = wfGetDB( DB_REPLICA );
2584
2585                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2586                                 '',
2587                                 [
2588                                         'lim' => 10,
2589                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2590                                         'showIfEmpty' => false,
2591                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2592                                 ]
2593                         );
2594                 }
2595         }
2596
2597         /**
2598          * Attempt to show a custom editing introduction, if supplied
2599          *
2600          * @return bool
2601          */
2602         protected function showCustomIntro() {
2603                 if ( $this->editintro ) {
2604                         $title = Title::newFromText( $this->editintro );
2605                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2606                                 // Added using template syntax, to take <noinclude>'s into account.
2607                                 $this->context->getOutput()->addWikiTextTitleTidy(
2608                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2609                                         $this->mTitle
2610                                 );
2611                                 return true;
2612                         }
2613                 }
2614                 return false;
2615         }
2616
2617         /**
2618          * Gets an editable textual representation of $content.
2619          * The textual representation can be turned by into a Content object by the
2620          * toEditContent() method.
2621          *
2622          * If $content is null or false or a string, $content is returned unchanged.
2623          *
2624          * If the given Content object is not of a type that can be edited using
2625          * the text base EditPage, an exception will be raised. Set
2626          * $this->allowNonTextContent to true to allow editing of non-textual
2627          * content.
2628          *
2629          * @param Content|null|bool|string $content
2630          * @return string The editable text form of the content.
2631          *
2632          * @throws MWException If $content is not an instance of TextContent and
2633          *   $this->allowNonTextContent is not true.
2634          */
2635         protected function toEditText( $content ) {
2636                 if ( $content === null || $content === false || is_string( $content ) ) {
2637                         return $content;
2638                 }
2639
2640                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2641                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2642                 }
2643
2644                 return $content->serialize( $this->contentFormat );
2645         }
2646
2647         /**
2648          * Turns the given text into a Content object by unserializing it.
2649          *
2650          * If the resulting Content object is not of a type that can be edited using
2651          * the text base EditPage, an exception will be raised. Set
2652          * $this->allowNonTextContent to true to allow editing of non-textual
2653          * content.
2654          *
2655          * @param string|null|bool $text Text to unserialize
2656          * @return Content|bool|null The content object created from $text. If $text was false
2657          *   or null, false resp. null will be  returned instead.
2658          *
2659          * @throws MWException If unserializing the text results in a Content
2660          *   object that is not an instance of TextContent and
2661          *   $this->allowNonTextContent is not true.
2662          */
2663         protected function toEditContent( $text ) {
2664                 if ( $text === false || $text === null ) {
2665                         return $text;
2666                 }
2667
2668                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2669                         $this->contentModel, $this->contentFormat );
2670
2671                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2672                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2673                 }
2674
2675                 return $content;
2676         }
2677
2678         /**
2679          * Send the edit form and related headers to OutputPage
2680          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2681          *     during form output near the top, for captchas and the like.
2682          *
2683          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2684          * use the EditPage::showEditForm:fields hook instead.
2685          */
2686         public function showEditForm( $formCallback = null ) {
2687                 # need to parse the preview early so that we know which templates are used,
2688                 # otherwise users with "show preview after edit box" will get a blank list
2689                 # we parse this near the beginning so that setHeaders can do the title
2690                 # setting work instead of leaving it in getPreviewText
2691                 $previewOutput = '';
2692                 if ( $this->formtype == 'preview' ) {
2693                         $previewOutput = $this->getPreviewText();
2694                 }
2695
2696                 $out = $this->context->getOutput();
2697
2698                 // Avoid PHP 7.1 warning of passing $this by reference
2699                 $editPage = $this;
2700                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2701
2702                 $this->setHeaders();
2703
2704                 $this->addTalkPageText();
2705                 $this->addEditNotices();
2706
2707                 if ( !$this->isConflict &&
2708                         $this->section != '' &&
2709                         !$this->isSectionEditSupported() ) {
2710                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2711                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2712                         // Someone is welcome to try refactoring though
2713                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2714                         return;
2715                 }
2716
2717                 $this->showHeader();
2718
2719                 $out->addHTML( $this->editFormPageTop );
2720
2721                 $user = $this->context->getUser();
2722                 if ( $user->getOption( 'previewontop' ) ) {
2723                         $this->displayPreviewArea( $previewOutput, true );
2724                 }
2725
2726                 $out->addHTML( $this->editFormTextTop );
2727
2728                 $showToolbar = true;
2729                 if ( $this->wasDeletedSinceLastEdit() ) {
2730                         if ( $this->formtype == 'save' ) {
2731                                 // Hide the toolbar and edit area, user can click preview to get it back
2732                                 // Add an confirmation checkbox and explanation.
2733                                 $showToolbar = false;
2734                         } else {
2735                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2736                                         'deletedwhileediting' );
2737                         }
2738                 }
2739
2740                 // @todo add EditForm plugin interface and use it here!
2741                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2742                 $out->addHTML( Html::openElement(
2743                         'form',
2744                         [
2745                                 'class' => 'mw-editform',
2746                                 'id' => self::EDITFORM_ID,
2747                                 'name' => self::EDITFORM_ID,
2748                                 'method' => 'post',
2749                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2750                                 'enctype' => 'multipart/form-data'
2751                         ]
2752                 ) );
2753
2754                 if ( is_callable( $formCallback ) ) {
2755                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2756                         call_user_func_array( $formCallback, [ &$out ] );
2757                 }
2758
2759                 // Add a check for Unicode support
2760                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2761
2762                 // Add an empty field to trip up spambots
2763                 $out->addHTML(
2764                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2765                         . Html::rawElement(
2766                                 'label',
2767                                 [ 'for' => 'wpAntispam' ],
2768                                 $this->context->msg( 'simpleantispam-label' )->parse()
2769                         )
2770                         . Xml::element(
2771                                 'input',
2772                                 [
2773                                         'type' => 'text',
2774                                         'name' => 'wpAntispam',
2775                                         'id' => 'wpAntispam',
2776                                         'value' => ''
2777                                 ]
2778                         )
2779                         . Xml::closeElement( 'div' )
2780                 );
2781
2782                 // Avoid PHP 7.1 warning of passing $this by reference
2783                 $editPage = $this;
2784                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2785
2786                 // Put these up at the top to ensure they aren't lost on early form submission
2787                 $this->showFormBeforeText();
2788
2789                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2790                         $username = $this->lastDelete->user_name;
2791                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2792
2793                         // It is better to not parse the comment at all than to have templates expanded in the middle
2794                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2795                         $key = $comment === ''
2796                                 ? 'confirmrecreate-noreason'
2797                                 : 'confirmrecreate';
2798                         $out->addHTML(
2799                                 '<div class="mw-confirm-recreate">' .
2800                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2801                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2802                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2803                                 ) .
2804                                 '</div>'
2805                         );
2806                 }
2807
2808                 # When the summary is hidden, also hide them on preview/show changes
2809                 if ( $this->nosummary ) {
2810                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2811                 }
2812
2813                 # If a blank edit summary was previously provided, and the appropriate
2814                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2815                 # user being bounced back more than once in the event that a summary
2816                 # is not required.
2817                 # ####
2818                 # For a bit more sophisticated detection of blank summaries, hash the
2819                 # automatic one and pass that in the hidden field wpAutoSummary.
2820                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2821                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2822                 }
2823
2824                 if ( $this->undidRev ) {
2825                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2826                 }
2827
2828                 if ( $this->selfRedirect ) {
2829                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2830                 }
2831
2832                 if ( $this->hasPresetSummary ) {
2833                         // If a summary has been preset using &summary= we don't want to prompt for
2834                         // a different summary. Only prompt for a summary if the summary is blanked.
2835                         // (T19416)
2836                         $this->autoSumm = md5( '' );
2837                 }
2838
2839                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2840                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2841
2842                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2843                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2844
2845                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2846                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2847
2848                 $out->enableOOUI();
2849
2850                 if ( $this->section == 'new' ) {
2851                         $this->showSummaryInput( true, $this->summary );
2852                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2853                 }
2854
2855                 $out->addHTML( $this->editFormTextBeforeContent );
2856                 if ( $this->isConflict ) {
2857                         // In an edit conflict, we turn textbox2 into the user's text,
2858                         // and textbox1 into the stored version
2859                         $this->textbox2 = $this->textbox1;
2860
2861                         $content = $this->getCurrentContent();
2862                         $this->textbox1 = $this->toEditText( $content );
2863
2864                         $editConflictHelper = $this->getEditConflictHelper();
2865                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2866                         $editConflictHelper->setContentModel( $this->contentModel );
2867                         $editConflictHelper->setContentFormat( $this->contentFormat );
2868                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2869                 }
2870
2871                 if ( !$this->mTitle->isCssJsSubpage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2872                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2873                 }
2874
2875                 if ( $this->blankArticle ) {
2876                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2877                 }
2878
2879                 if ( $this->isConflict ) {
2880                         // In an edit conflict bypass the overridable content form method
2881                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2882                         // resolved between page source edits and custom ui edits using the
2883                         // custom edit ui.
2884                         $conflictTextBoxAttribs = [];
2885                         if ( $this->wasDeletedSinceLastEdit() ) {
2886                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2887                         } elseif ( $this->isOldRev ) {
2888                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2889                         }
2890
2891                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2892                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2893                 } else {
2894                         $this->showContentForm();
2895                 }
2896
2897                 $out->addHTML( $this->editFormTextAfterContent );
2898
2899                 $this->showStandardInputs();
2900
2901                 $this->showFormAfterText();
2902
2903                 $this->showTosSummary();
2904
2905                 $this->showEditTools();
2906
2907                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2908
2909                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2910
2911                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2912                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2913
2914                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2915                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2916
2917                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2918
2919                 if ( $this->isConflict ) {
2920                         try {
2921                                 $this->showConflict();
2922                         } catch ( MWContentSerializationException $ex ) {
2923                                 // this can't really happen, but be nice if it does.
2924                                 $msg = $this->context->msg(
2925                                         'content-failed-to-parse',
2926                                         $this->contentModel,
2927                                         $this->contentFormat,
2928                                         $ex->getMessage()
2929                                 );
2930                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2931                         }
2932                 }
2933
2934                 // Set a hidden field so JS knows what edit form mode we are in
2935                 if ( $this->isConflict ) {
2936                         $mode = 'conflict';
2937                 } elseif ( $this->preview ) {
2938                         $mode = 'preview';
2939                 } elseif ( $this->diff ) {
2940                         $mode = 'diff';
2941                 } else {
2942                         $mode = 'text';
2943                 }
2944                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2945
2946                 // Marker for detecting truncated form data.  This must be the last
2947                 // parameter sent in order to be of use, so do not move me.
2948                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2949                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2950
2951                 if ( !$user->getOption( 'previewontop' ) ) {
2952                         $this->displayPreviewArea( $previewOutput, false );
2953                 }
2954         }
2955
2956         /**
2957          * Wrapper around TemplatesOnThisPageFormatter to make
2958          * a "templates on this page" list.
2959          *
2960          * @param Title[] $templates
2961          * @return string HTML
2962          */
2963         public function makeTemplatesOnThisPageList( array $templates ) {
2964                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2965                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2966                 );
2967
2968                 // preview if preview, else section if section, else false
2969                 $type = false;
2970                 if ( $this->preview ) {
2971                         $type = 'preview';
2972                 } elseif ( $this->section != '' ) {
2973                         $type = 'section';
2974                 }
2975
2976                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2977                         $templateListFormatter->format( $templates, $type )
2978                 );
2979         }
2980
2981         /**
2982          * Extract the section title from current section text, if any.
2983          *
2984          * @param string $text
2985          * @return string|bool String or false
2986          */
2987         public static function extractSectionTitle( $text ) {
2988                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2989                 if ( !empty( $matches[2] ) ) {
2990                         global $wgParser;
2991                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2992                 } else {
2993                         return false;
2994                 }
2995         }
2996
2997         protected function showHeader() {
2998                 $out = $this->context->getOutput();
2999                 $user = $this->context->getUser();
3000                 if ( $this->isConflict ) {
3001                         $this->addExplainConflictHeader( $out );
3002                         $this->editRevId = $this->page->getLatest();
3003                 } else {
3004                         if ( $this->section != '' && $this->section != 'new' ) {
3005                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
3006                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
3007                                         if ( $sectionTitle !== false ) {
3008                                                 $this->summary = "/* $sectionTitle */ ";
3009                                         }
3010                                 }
3011                         }
3012
3013                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
3014
3015                         if ( $this->missingComment ) {
3016                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
3017                         }
3018
3019                         if ( $this->missingSummary && $this->section != 'new' ) {
3020                                 $out->wrapWikiMsg(
3021                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3022                                         [ 'missingsummary', $buttonLabel ]
3023                                 );
3024                         }
3025
3026                         if ( $this->missingSummary && $this->section == 'new' ) {
3027                                 $out->wrapWikiMsg(
3028                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3029                                         [ 'missingcommentheader', $buttonLabel ]
3030                                 );
3031                         }
3032
3033                         if ( $this->blankArticle ) {
3034                                 $out->wrapWikiMsg(
3035                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3036                                         [ 'blankarticle', $buttonLabel ]
3037                                 );
3038                         }
3039
3040                         if ( $this->selfRedirect ) {
3041                                 $out->wrapWikiMsg(
3042                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3043                                         [ 'selfredirect', $buttonLabel ]
3044                                 );
3045                         }
3046
3047                         if ( $this->hookError !== '' ) {
3048                                 $out->addWikiText( $this->hookError );
3049                         }
3050
3051                         if ( $this->section != 'new' ) {
3052                                 $revision = $this->mArticle->getRevisionFetched();
3053                                 if ( $revision ) {
3054                                         // Let sysop know that this will make private content public if saved
3055
3056                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
3057                                                 $out->wrapWikiMsg(
3058                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3059                                                         'rev-deleted-text-permission'
3060                                                 );
3061                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
3062                                                 $out->wrapWikiMsg(
3063                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3064                                                         'rev-deleted-text-view'
3065                                                 );
3066                                         }
3067
3068                                         if ( !$revision->isCurrent() ) {
3069                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3070                                                 $out->addWikiMsg( 'editingold' );
3071                                                 $this->isOldRev = true;
3072                                         }
3073                                 } elseif ( $this->mTitle->exists() ) {
3074                                         // Something went wrong
3075
3076                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3077                                                 [ 'missing-revision', $this->oldid ] );
3078                                 }
3079                         }
3080                 }
3081
3082                 if ( wfReadOnly() ) {
3083                         $out->wrapWikiMsg(
3084                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3085                                 [ 'readonlywarning', wfReadOnlyReason() ]
3086                         );
3087                 } elseif ( $user->isAnon() ) {
3088                         if ( $this->formtype != 'preview' ) {
3089                                 $out->wrapWikiMsg(
3090                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3091                                         [ 'anoneditwarning',
3092                                                 // Log-in link
3093                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3094                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3095                                                 ] ),
3096                                                 // Sign-up link
3097                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3098                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3099                                                 ] )
3100                                         ]
3101                                 );
3102                         } else {
3103                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3104                                         'anonpreviewwarning'
3105                                 );
3106                         }
3107                 } else {
3108                         if ( $this->mTitle->isCssJsSubpage() ) {
3109                                 # Check the skin exists
3110                                 if ( $this->isWrongCaseCssJsPage() ) {
3111                                         $out->wrapWikiMsg(
3112                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3113                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3114                                         );
3115                                 }
3116                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3117                                         $isCssSubpage = $this->mTitle->isCssSubpage();
3118                                         $out->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3119                                                 $isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3120                                         );
3121                                         if ( $this->formtype !== 'preview' ) {
3122                                                 $config = $this->context->getConfig();
3123                                                 if ( $isCssSubpage && $config->get( 'AllowUserCss' ) ) {
3124                                                         $out->wrapWikiMsg(
3125                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3126                                                                 [ 'usercssyoucanpreview' ]
3127                                                         );
3128                                                 }
3129
3130                                                 if ( $this->mTitle->isJsSubpage() && $config->get( 'AllowUserJs' ) ) {
3131                                                         $out->wrapWikiMsg(
3132                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3133                                                                 [ 'userjsyoucanpreview' ]
3134                                                         );
3135                                                 }
3136                                         }
3137                                 }
3138                         }
3139                 }
3140
3141                 $this->addPageProtectionWarningHeaders();
3142
3143                 $this->addLongPageWarningHeader();
3144
3145                 # Add header copyright warning
3146                 $this->showHeaderCopyrightWarning();
3147         }
3148
3149         /**
3150          * Helper function for summary input functions, which returns the neccessary
3151          * attributes for the input.
3152          *
3153          * @param array|null $inputAttrs Array of attrs to use on the input
3154          * @return array
3155          */
3156         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3157                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3158                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3159                         'id' => 'wpSummary',
3160                         'name' => 'wpSummary',
3161                         'maxlength' => '200',
3162                         'tabindex' => 1,
3163                         'size' => 60,
3164                         'spellcheck' => 'true',
3165                 ];
3166         }
3167
3168         /**
3169          * Standard summary input and label (wgSummary), abstracted so EditPage
3170          * subclasses may reorganize the form.
3171          * Note that you do not need to worry about the label's for=, it will be
3172          * inferred by the id given to the input. You can remove them both by
3173          * passing [ 'id' => false ] to $userInputAttrs.
3174          *
3175          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3176          * @param string $summary The value of the summary input
3177          * @param string $labelText The html to place inside the label
3178          * @param array $inputAttrs Array of attrs to use on the input
3179          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3180          * @return array An array in the format [ $label, $input ]
3181          */
3182         public function getSummaryInput( $summary = "", $labelText = null,
3183                 $inputAttrs = null, $spanLabelAttrs = null
3184         ) {
3185                 wfDeprecated( __METHOD__, '1.30' );
3186                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3187                 $inputAttrs += Linker::tooltipAndAccesskeyAttribs( 'summary' );
3188
3189                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3190                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3191                         'id' => "wpSummaryLabel"
3192                 ];
3193
3194                 $label = null;
3195                 if ( $labelText ) {
3196                         $label = Xml::tags(
3197                                 'label',
3198                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3199                                 $labelText
3200                         );
3201                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3202                 }
3203
3204                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3205
3206                 return [ $label, $input ];
3207         }
3208
3209         /**
3210          * Builds a standard summary input with a label.
3211          *
3212          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3213          * @param string $summary The value of the summary input
3214          * @param string $labelText The html to place inside the label
3215          * @param array $inputAttrs Array of attrs to use on the input
3216          *
3217          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3218          */
3219         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3220                 wfDeprecated( __METHOD__, '1.30' );
3221                 return $this->getSummaryInputWidget( $summary, $labelText, $inputAttrs );
3222         }
3223
3224         /**
3225          * Builds a standard summary input with a label.
3226          *
3227          * @param string $summary The value of the summary input
3228          * @param string $labelText The html to place inside the label
3229          * @param array $inputAttrs Array of attrs to use on the input
3230          *
3231          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3232          */
3233         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3234                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3235                         $this->getSummaryInputAttributes( $inputAttrs )
3236                 );
3237                 $inputAttrs += [
3238                         'title' => Linker::titleAttrib( 'summary' ),
3239                         'accessKey' => Linker::accesskey( 'summary' ),
3240                 ];
3241
3242                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3243                 $inputAttrs['inputId'] = $inputAttrs['id'];
3244                 $inputAttrs['id'] = 'wpSummaryWidget';
3245
3246                 return new OOUI\FieldLayout(
3247                         new OOUI\TextInputWidget( [
3248                                 'value' => $summary,
3249                                 'infusable' => true,
3250                         ] + $inputAttrs ),
3251                         [
3252                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3253                                 'align' => 'top',
3254                                 'id' => 'wpSummaryLabel',
3255                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3256                         ]
3257                 );
3258         }
3259
3260         /**
3261          * @param bool $isSubjectPreview True if this is the section subject/title
3262          *   up top, or false if this is the comment summary
3263          *   down below the textarea
3264          * @param string $summary The text of the summary to display
3265          */
3266         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3267                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3268                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3269                 if ( $isSubjectPreview ) {
3270                         if ( $this->nosummary ) {
3271                                 return;
3272                         }
3273                 } else {
3274                         if ( !$this->mShowSummaryField ) {
3275                                 return;
3276                         }
3277                 }
3278
3279                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3280                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3281                                 $summary,
3282                                 $labelText,
3283                                 [ 'class' => $summaryClass ]
3284                         ) );
3285         }
3286
3287         /**
3288          * @param bool $isSubjectPreview True if this is the section subject/title
3289          *   up top, or false if this is the comment summary
3290          *   down below the textarea
3291          * @param string $summary The text of the summary to display
3292          * @return string
3293          */
3294         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3295                 // avoid spaces in preview, gets always trimmed on save
3296                 $summary = trim( $summary );
3297                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3298                         return "";
3299                 }
3300
3301                 global $wgParser;
3302
3303                 if ( $isSubjectPreview ) {
3304                         $summary = $this->context->msg( 'newsectionsummary' )
3305                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3306                                 ->inContentLanguage()->text();
3307                 }
3308
3309                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3310
3311                 $summary = $this->context->msg( $message )->parse()
3312                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3313                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3314         }
3315
3316         protected function showFormBeforeText() {
3317                 $out = $this->context->getOutput();
3318                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3319                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3320                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3321                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3322                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3323         }
3324
3325         protected function showFormAfterText() {
3326                 /**
3327                  * To make it harder for someone to slip a user a page
3328                  * which submits an edit form to the wiki without their
3329                  * knowledge, a random token is associated with the login
3330                  * session. If it's not passed back with the submission,
3331                  * we won't save the page, or render user JavaScript and
3332                  * CSS previews.
3333                  *
3334                  * For anon editors, who may not have a session, we just
3335                  * include the constant suffix to prevent editing from
3336                  * broken text-mangling proxies.
3337                  */
3338                 $this->context->getOutput()->addHTML(
3339                         "\n" .
3340                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3341                         "\n"
3342                 );
3343         }
3344
3345         /**
3346          * Subpage overridable method for printing the form for page content editing
3347          * By default this simply outputs wpTextbox1
3348          * Subclasses can override this to provide a custom UI for editing;
3349          * be it a form, or simply wpTextbox1 with a modified content that will be
3350          * reverse modified when extracted from the post data.
3351          * Note that this is basically the inverse for importContentFormData
3352          */
3353         protected function showContentForm() {
3354                 $this->showTextbox1();
3355         }
3356
3357         /**
3358          * Method to output wpTextbox1
3359          * The $textoverride method can be used by subclasses overriding showContentForm
3360          * to pass back to this method.
3361          *
3362          * @param array $customAttribs Array of html attributes to use in the textarea
3363          * @param string $textoverride Optional text to override $this->textarea1 with
3364          */
3365         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3366                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3367                         $attribs = [ 'style' => 'display:none;' ];
3368                 } else {
3369                         $builder = new TextboxBuilder();
3370                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3371
3372                         # Is an old revision being edited?
3373                         if ( $this->isOldRev ) {
3374                                 $classes[] = 'mw-textarea-oldrev';
3375                         }
3376
3377                         $attribs = [ 'tabindex' => 1 ];
3378
3379                         if ( is_array( $customAttribs ) ) {
3380                                 $attribs += $customAttribs;
3381                         }
3382
3383                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3384                 }
3385
3386                 $this->showTextbox(
3387                         $textoverride !== null ? $textoverride : $this->textbox1,
3388                         'wpTextbox1',
3389                         $attribs
3390                 );
3391         }
3392
3393         protected function showTextbox2() {
3394                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3395         }
3396
3397         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3398                 $builder = new TextboxBuilder();
3399                 $attribs = $builder->buildTextboxAttribs(
3400                         $name,
3401                         $customAttribs,
3402                         $this->context->getUser(),
3403                         $this->mTitle
3404                 );
3405
3406                 $this->context->getOutput()->addHTML(
3407                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3408                 );
3409         }
3410
3411         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3412                 $classes = [];
3413                 if ( $isOnTop ) {
3414                         $classes[] = 'ontop';
3415                 }
3416
3417                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3418
3419                 if ( $this->formtype != 'preview' ) {
3420                         $attribs['style'] = 'display: none;';
3421                 }
3422
3423                 $out = $this->context->getOutput();
3424                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3425
3426                 if ( $this->formtype == 'preview' ) {
3427                         $this->showPreview( $previewOutput );
3428                 } else {
3429                         // Empty content container for LivePreview
3430                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3431                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3432                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3433                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3434                 }
3435
3436                 $out->addHTML( '</div>' );
3437
3438                 if ( $this->formtype == 'diff' ) {
3439                         try {
3440                                 $this->showDiff();
3441                         } catch ( MWContentSerializationException $ex ) {
3442                                 $msg = $this->context->msg(
3443                                         'content-failed-to-parse',
3444                                         $this->contentModel,
3445                                         $this->contentFormat,
3446                                         $ex->getMessage()
3447                                 );
3448                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3449                         }
3450                 }
3451         }
3452
3453         /**
3454          * Append preview output to OutputPage.
3455          * Includes category rendering if this is a category page.
3456          *
3457          * @param string $text The HTML to be output for the preview.
3458          */
3459         protected function showPreview( $text ) {
3460                 if ( $this->mArticle instanceof CategoryPage ) {
3461                         $this->mArticle->openShowCategory();
3462                 }
3463                 # This hook seems slightly odd here, but makes things more
3464                 # consistent for extensions.
3465                 $out = $this->context->getOutput();
3466                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3467                 $out->addHTML( $text );
3468                 if ( $this->mArticle instanceof CategoryPage ) {
3469                         $this->mArticle->closeShowCategory();
3470                 }
3471         }
3472
3473         /**
3474          * Get a diff between the current contents of the edit box and the
3475          * version of the page we're editing from.
3476          *
3477          * If this is a section edit, we'll replace the section as for final
3478          * save and then make a comparison.
3479          */
3480         public function showDiff() {
3481                 global $wgContLang;
3482
3483                 $oldtitlemsg = 'currentrev';
3484                 # if message does not exist, show diff against the preloaded default
3485                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3486                         $oldtext = $this->mTitle->getDefaultMessageText();
3487                         if ( $oldtext !== false ) {
3488                                 $oldtitlemsg = 'defaultmessagetext';
3489                                 $oldContent = $this->toEditContent( $oldtext );
3490                         } else {
3491                                 $oldContent = null;
3492                         }
3493                 } else {
3494                         $oldContent = $this->getCurrentContent();
3495                 }
3496
3497                 $textboxContent = $this->toEditContent( $this->textbox1 );
3498                 if ( $this->editRevId !== null ) {
3499                         $newContent = $this->page->replaceSectionAtRev(
3500                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3501                         );
3502                 } else {
3503                         $newContent = $this->page->replaceSectionContent(
3504                                 $this->section, $textboxContent, $this->summary, $this->edittime
3505                         );
3506                 }
3507
3508                 if ( $newContent ) {
3509                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3510
3511                         $user = $this->context->getUser();
3512                         $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
3513                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3514                 }
3515
3516                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3517                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3518                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3519
3520                         if ( !$oldContent ) {
3521                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3522                         }
3523
3524                         if ( !$newContent ) {
3525                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3526                         }
3527
3528                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3529                         $de->setContent( $oldContent, $newContent );
3530
3531                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3532                         $de->showDiffStyle();
3533                 } else {
3534                         $difftext = '';
3535                 }
3536
3537                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3538         }
3539
3540         /**
3541          * Show the header copyright warning.
3542          */
3543         protected function showHeaderCopyrightWarning() {
3544                 $msg = 'editpage-head-copy-warn';
3545                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3546                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3547                                 'editpage-head-copy-warn' );
3548                 }
3549         }
3550
3551         /**
3552          * Give a chance for site and per-namespace customizations of
3553          * terms of service summary link that might exist separately
3554          * from the copyright notice.
3555          *
3556          * This will display between the save button and the edit tools,
3557          * so should remain short!
3558          */
3559         protected function showTosSummary() {
3560                 $msg = 'editpage-tos-summary';
3561                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3562                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3563                         $out = $this->context->getOutput();
3564                         $out->addHTML( '<div class="mw-tos-summary">' );
3565                         $out->addWikiMsg( $msg );
3566                         $out->addHTML( '</div>' );
3567                 }
3568         }
3569
3570         /**
3571          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3572          * characters not present on most keyboards for copying/pasting.
3573          */
3574         protected function showEditTools() {
3575                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3576                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3577                         '</div>' );
3578         }
3579
3580         /**
3581          * Get the copyright warning
3582          *
3583          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3584          * @return string
3585          */
3586         protected function getCopywarn() {
3587                 return self::getCopyrightWarning( $this->mTitle );
3588         }
3589
3590         /**
3591          * Get the copyright warning, by default returns wikitext
3592          *
3593          * @param Title $title
3594          * @param string $format Output format, valid values are any function of a Message object
3595          * @param Language|string|null $langcode Language code or Language object.
3596          * @return string
3597          */
3598         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3599                 global $wgRightsText;
3600                 if ( $wgRightsText ) {
3601                         $copywarnMsg = [ 'copyrightwarning',
3602                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3603                                 $wgRightsText ];
3604                 } else {
3605                         $copywarnMsg = [ 'copyrightwarning2',
3606                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3607                 }
3608                 // Allow for site and per-namespace customization of contribution/copyright notice.
3609                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3610
3611                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3612                 if ( $langcode ) {
3613                         $msg->inLanguage( $langcode );
3614                 }
3615                 return "<div id=\"editpage-copywarn\">\n" .
3616                         $msg->$format() . "\n</div>";
3617         }
3618
3619         /**
3620          * Get the Limit report for page previews
3621          *
3622          * @since 1.22
3623          * @param ParserOutput $output ParserOutput object from the parse
3624          * @return string HTML
3625          */
3626         public static function getPreviewLimitReport( $output ) {
3627                 global $wgLang;
3628
3629                 if ( !$output || !$output->getLimitReportData() ) {
3630                         return '';
3631                 }
3632
3633                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3634                         wfMessage( 'limitreport-title' )->parseAsBlock()
3635                 );
3636
3637                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3638                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3639
3640                 $limitReport .= Html::openElement( 'table', [
3641                         'class' => 'preview-limit-report wikitable'
3642                 ] ) .
3643                         Html::openElement( 'tbody' );
3644
3645                 foreach ( $output->getLimitReportData() as $key => $value ) {
3646                         if ( Hooks::run( 'ParserLimitReportFormat',
3647                                 [ $key, &$value, &$limitReport, true, true ]
3648                         ) ) {
3649                                 $keyMsg = wfMessage( $key );
3650                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3651                                 if ( !$valueMsg->exists() ) {
3652                                         $valueMsg = new RawMessage( '$1' );
3653                                 }
3654                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3655                                         $limitReport .= Html::openElement( 'tr' ) .
3656                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3657                                                 Html::rawElement( 'td', null,
3658                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3659                                                 ) .
3660                                                 Html::closeElement( 'tr' );
3661                                 }
3662                         }
3663                 }
3664
3665                 $limitReport .= Html::closeElement( 'tbody' ) .
3666                         Html::closeElement( 'table' ) .
3667                         Html::closeElement( 'div' );
3668
3669                 return $limitReport;
3670         }
3671
3672         protected function showStandardInputs( &$tabindex = 2 ) {
3673                 $out = $this->context->getOutput();
3674                 $out->addHTML( "<div class='editOptions'>\n" );
3675
3676                 if ( $this->section != 'new' ) {
3677                         $this->showSummaryInput( false, $this->summary );
3678                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3679                 }
3680
3681                 $checkboxes = $this->getCheckboxesWidget(
3682                         $tabindex,
3683                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3684                 );
3685                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3686
3687                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3688
3689                 // Show copyright warning.
3690                 $out->addWikiText( $this->getCopywarn() );
3691                 $out->addHTML( $this->editFormTextAfterWarn );
3692
3693                 $out->addHTML( "<div class='editButtons'>\n" );
3694                 $out->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3695
3696                 $cancel = $this->getCancelLink();
3697
3698                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3699                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3700                 $edithelp =
3701                         Html::linkButton(
3702                                 $this->context->msg( 'edithelp' )->text(),
3703                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3704                                 [ 'mw-ui-quiet' ]
3705                         ) .
3706                         $this->context->msg( 'word-separator' )->escaped() .
3707                         $this->context->msg( 'newwindow' )->parse();
3708
3709                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3710                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3711                 $out->addHTML( "</div><!-- editButtons -->\n" );
3712
3713                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3714
3715                 $out->addHTML( "</div><!-- editOptions -->\n" );
3716         }
3717
3718         /**
3719          * Show an edit conflict. textbox1 is already shown in showEditForm().
3720          * If you want to use another entry point to this function, be careful.
3721          */
3722         protected function showConflict() {
3723                 $out = $this->context->getOutput();
3724                 // Avoid PHP 7.1 warning of passing $this by reference
3725                 $editPage = $this;
3726                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3727                         $this->incrementConflictStats();
3728
3729                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3730                 }
3731         }
3732
3733         protected function incrementConflictStats() {
3734                 $this->getEditConflictHelper()->incrementConflictStats();
3735         }
3736
3737         /**
3738          * @return string
3739          */
3740         public function getCancelLink() {
3741                 $cancelParams = [];
3742                 if ( !$this->isConflict && $this->oldid > 0 ) {
3743                         $cancelParams['oldid'] = $this->oldid;
3744                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3745                         $cancelParams['redirect'] = 'no';
3746                 }
3747
3748                 return new OOUI\ButtonWidget( [
3749                         'id' => 'mw-editform-cancel',
3750                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3751                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3752                         'framed' => false,
3753                         'infusable' => true,
3754                         'flags' => 'destructive',
3755                 ] );
3756         }
3757
3758         /**
3759          * Returns the URL to use in the form's action attribute.
3760          * This is used by EditPage subclasses when simply customizing the action
3761          * variable in the constructor is not enough. This can be used when the
3762          * EditPage lives inside of a Special page rather than a custom page action.
3763          *
3764          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3765          * @return string
3766          */
3767         protected function getActionURL( Title $title ) {
3768                 return $title->getLocalURL( [ 'action' => $this->action ] );
3769         }
3770
3771         /**
3772          * Check if a page was deleted while the user was editing it, before submit.
3773          * Note that we rely on the logging table, which hasn't been always there,
3774          * but that doesn't matter, because this only applies to brand new
3775          * deletes.
3776          * @return bool
3777          */
3778         protected function wasDeletedSinceLastEdit() {
3779                 if ( $this->deletedSinceEdit !== null ) {
3780                         return $this->deletedSinceEdit;
3781                 }
3782
3783                 $this->deletedSinceEdit = false;
3784
3785                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3786                         $this->lastDelete = $this->getLastDelete();
3787                         if ( $this->lastDelete ) {
3788                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3789                                 if ( $deleteTime > $this->starttime ) {
3790                                         $this->deletedSinceEdit = true;
3791                                 }
3792                         }
3793                 }
3794
3795                 return $this->deletedSinceEdit;
3796         }
3797
3798         /**
3799          * @return bool|stdClass
3800          */
3801         protected function getLastDelete() {
3802                 $dbr = wfGetDB( DB_REPLICA );
3803                 $commentQuery = CommentStore::newKey( 'log_comment' )->getJoin();
3804                 $data = $dbr->selectRow(
3805                         [ 'logging', 'user' ] + $commentQuery['tables'],
3806                         [
3807                                 'log_type',
3808                                 'log_action',
3809                                 'log_timestamp',
3810                                 'log_user',
3811                                 'log_namespace',
3812                                 'log_title',
3813                                 'log_params',
3814                                 'log_deleted',
3815                                 'user_name'
3816                         ] + $commentQuery['fields'], [
3817                                 'log_namespace' => $this->mTitle->getNamespace(),
3818                                 'log_title' => $this->mTitle->getDBkey(),
3819                                 'log_type' => 'delete',
3820                                 'log_action' => 'delete',
3821                                 'user_id=log_user'
3822                         ],
3823                         __METHOD__,
3824                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3825                         [
3826                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3827                         ] + $commentQuery['joins']
3828                 );
3829                 // Quick paranoid permission checks...
3830                 if ( is_object( $data ) ) {
3831                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3832                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3833                         }
3834
3835                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3836                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3837                                 $data->log_comment_data = null;
3838                         }
3839                 }
3840
3841                 return $data;
3842         }
3843
3844         /**
3845          * Get the rendered text for previewing.
3846          * @throws MWException
3847          * @return string
3848          */
3849         public function getPreviewText() {
3850                 $out = $this->context->getOutput();
3851                 $config = $this->context->getConfig();
3852
3853                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3854                         // Could be an offsite preview attempt. This is very unsafe if
3855                         // HTML is enabled, as it could be an attack.
3856                         $parsedNote = '';
3857                         if ( $this->textbox1 !== '' ) {
3858                                 // Do not put big scary notice, if previewing the empty
3859                                 // string, which happens when you initially edit
3860                                 // a category page, due to automatic preview-on-open.
3861                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3862                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3863                                         true, /* interface */true );
3864                         }
3865                         $this->incrementEditFailureStats( 'session_loss' );
3866                         return $parsedNote;
3867                 }
3868
3869                 $note = '';
3870
3871                 try {
3872                         $content = $this->toEditContent( $this->textbox1 );
3873
3874                         $previewHTML = '';
3875                         if ( !Hooks::run(
3876                                 'AlternateEditPreview',
3877                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3878                         ) {
3879                                 return $previewHTML;
3880                         }
3881
3882                         # provide a anchor link to the editform
3883                         $continueEditing = '<span class="mw-continue-editing">' .
3884                                 '[[#' . self::EDITFORM_ID . '|' .
3885                                 $this->context->getLanguage()->getArrow() . ' ' .
3886                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3887                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3888                                 if ( $this->mTokenOkExceptSuffix ) {
3889                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3890                                         $this->incrementEditFailureStats( 'bad_token' );
3891                                 } else {
3892                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3893                                         $this->incrementEditFailureStats( 'session_loss' );
3894                                 }
3895                         } elseif ( $this->incompleteForm ) {
3896                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3897                                 if ( $this->mTriedSave ) {
3898                                         $this->incrementEditFailureStats( 'incomplete_form' );
3899                                 }
3900                         } else {
3901                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3902                         }
3903
3904                         # don't parse non-wikitext pages, show message about preview
3905                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3906                                 if ( $this->mTitle->isCssJsSubpage() ) {
3907                                         $level = 'user';
3908                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3909                                         $level = 'site';
3910                                 } else {
3911                                         $level = false;
3912                                 }
3913
3914                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3915                                         $format = 'css';
3916                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3917                                                 $format = false;
3918                                         }
3919                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3920                                         $format = 'js';
3921                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3922                                                 $format = false;
3923                                         }
3924                                 } else {
3925                                         $format = false;
3926                                 }
3927
3928                                 # Used messages to make sure grep find them:
3929                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3930                                 if ( $level && $format ) {
3931                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3932                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3933                                                 ' ' . $continueEditing . "</div>";
3934                                 }
3935                         }
3936
3937                         # If we're adding a comment, we need to show the
3938                         # summary as the headline
3939                         if ( $this->section === "new" && $this->summary !== "" ) {
3940                                 $content = $content->addSectionHeader( $this->summary );
3941                         }
3942
3943                         $hook_args = [ $this, &$content ];
3944                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3945
3946                         $parserResult = $this->doPreviewParse( $content );
3947                         $parserOutput = $parserResult['parserOutput'];
3948                         $previewHTML = $parserResult['html'];
3949                         $this->mParserOutput = $parserOutput;
3950                         $out->addParserOutputMetadata( $parserOutput );
3951
3952                         if ( count( $parserOutput->getWarnings() ) ) {
3953                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3954                         }
3955
3956                 } catch ( MWContentSerializationException $ex ) {
3957                         $m = $this->context->msg(
3958                                 'content-failed-to-parse',
3959                                 $this->contentModel,
3960                                 $this->contentFormat,
3961                                 $ex->getMessage()
3962                         );
3963                         $note .= "\n\n" . $m->parse();
3964                         $previewHTML = '';
3965                 }
3966
3967                 if ( $this->isConflict ) {
3968                         $conflict = '<h2 id="mw-previewconflict">'
3969                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3970                 } else {
3971                         $conflict = '<hr />';
3972                 }
3973
3974                 $previewhead = "<div class='previewnote'>\n" .
3975                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3976                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3977
3978                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3979                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3980                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3981                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3982
3983                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3984         }
3985
3986         private function incrementEditFailureStats( $failureType ) {
3987                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3988                 $stats->increment( 'edit.failures.' . $failureType );
3989         }
3990
3991         /**
3992          * Get parser options for a preview
3993          * @return ParserOptions
3994          */
3995         protected function getPreviewParserOptions() {
3996                 $parserOptions = $this->page->makeParserOptions( $this->context );
3997                 $parserOptions->setIsPreview( true );
3998                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3999                 $parserOptions->enableLimitReport();
4000                 return $parserOptions;
4001         }
4002
4003         /**
4004          * Parse the page for a preview. Subclasses may override this class, in order
4005          * to parse with different options, or to otherwise modify the preview HTML.
4006          *
4007          * @param Content $content The page content
4008          * @return array with keys:
4009          *   - parserOutput: The ParserOutput object
4010          *   - html: The HTML to be displayed
4011          */
4012         protected function doPreviewParse( Content $content ) {
4013                 $user = $this->context->getUser();
4014                 $parserOptions = $this->getPreviewParserOptions();
4015                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
4016                 $scopedCallback = $parserOptions->setupFakeRevision(
4017                         $this->mTitle, $pstContent, $user );
4018                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
4019                 ScopedCallback::consume( $scopedCallback );
4020                 $parserOutput->setEditSectionTokens( false ); // no section edit links
4021                 return [
4022                         'parserOutput' => $parserOutput,
4023                         'html' => $parserOutput->getText( [
4024                                 'enableSectionEditLinks' => false
4025                         ] )
4026                 ];
4027         }
4028
4029         /**
4030          * @return array
4031          */
4032         public function getTemplates() {
4033                 if ( $this->preview || $this->section != '' ) {
4034                         $templates = [];
4035                         if ( !isset( $this->mParserOutput ) ) {
4036                                 return $templates;
4037                         }
4038                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
4039                                 foreach ( array_keys( $template ) as $dbk ) {
4040                                         $templates[] = Title::makeTitle( $ns, $dbk );
4041                                 }
4042                         }
4043                         return $templates;
4044                 } else {
4045                         return $this->mTitle->getTemplateLinksFrom();
4046                 }
4047         }
4048
4049         /**
4050          * Shows a bulletin board style toolbar for common editing functions.
4051          * It can be disabled in the user preferences.
4052          *
4053          * @param Title $title Title object for the page being edited (optional)
4054          * @return string
4055          */
4056         public static function getEditToolbar( $title = null ) {
4057                 global $wgContLang, $wgOut;
4058                 global $wgEnableUploads, $wgForeignFileRepos;
4059
4060                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4061                 $showSignature = true;
4062                 if ( $title ) {
4063                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4064                 }
4065
4066                 /**
4067                  * $toolarray is an array of arrays each of which includes the
4068                  * opening tag, the closing tag, optionally a sample text that is
4069                  * inserted between the two when no selection is highlighted
4070                  * and.  The tip text is shown when the user moves the mouse
4071                  * over the button.
4072                  *
4073                  * Images are defined in ResourceLoaderEditToolbarModule.
4074                  */
4075                 $toolarray = [
4076                         [
4077                                 'id'     => 'mw-editbutton-bold',
4078                                 'open'   => '\'\'\'',
4079                                 'close'  => '\'\'\'',
4080                                 'sample' => wfMessage( 'bold_sample' )->text(),
4081                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4082                         ],
4083                         [
4084                                 'id'     => 'mw-editbutton-italic',
4085                                 'open'   => '\'\'',
4086                                 'close'  => '\'\'',
4087                                 'sample' => wfMessage( 'italic_sample' )->text(),
4088                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4089                         ],
4090                         [
4091                                 'id'     => 'mw-editbutton-link',
4092                                 'open'   => '[[',
4093                                 'close'  => ']]',
4094                                 'sample' => wfMessage( 'link_sample' )->text(),
4095                                 'tip'    => wfMessage( 'link_tip' )->text(),
4096                         ],
4097                         [
4098                                 'id'     => 'mw-editbutton-extlink',
4099                                 'open'   => '[',
4100                                 'close'  => ']',
4101                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4102                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4103                         ],
4104                         [
4105                                 'id'     => 'mw-editbutton-headline',
4106                                 'open'   => "\n== ",
4107                                 'close'  => " ==\n",
4108                                 'sample' => wfMessage( 'headline_sample' )->text(),
4109                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4110                         ],
4111                         $imagesAvailable ? [
4112                                 'id'     => 'mw-editbutton-image',
4113                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4114                                 'close'  => ']]',
4115                                 'sample' => wfMessage( 'image_sample' )->text(),
4116                                 'tip'    => wfMessage( 'image_tip' )->text(),
4117                         ] : false,
4118                         $imagesAvailable ? [
4119                                 'id'     => 'mw-editbutton-media',
4120                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4121                                 'close'  => ']]',
4122                                 'sample' => wfMessage( 'media_sample' )->text(),
4123                                 'tip'    => wfMessage( 'media_tip' )->text(),
4124                         ] : false,
4125                         [
4126                                 'id'     => 'mw-editbutton-nowiki',
4127                                 'open'   => "<nowiki>",
4128                                 'close'  => "</nowiki>",
4129                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4130                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4131                         ],
4132                         $showSignature ? [
4133                                 'id'     => 'mw-editbutton-signature',
4134                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4135                                 'close'  => '',
4136                                 'sample' => '',
4137                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4138                         ] : false,
4139                         [
4140                                 'id'     => 'mw-editbutton-hr',
4141                                 'open'   => "\n----\n",
4142                                 'close'  => '',
4143                                 'sample' => '',
4144                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4145                         ]
4146                 ];
4147
4148                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4149                 foreach ( $toolarray as $tool ) {
4150                         if ( !$tool ) {
4151                                 continue;
4152                         }
4153
4154                         $params = [
4155                                 // Images are defined in ResourceLoaderEditToolbarModule
4156                                 false,
4157                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4158                                 // Older browsers show a "speedtip" type message only for ALT.
4159                                 // Ideally these should be different, realistically they
4160                                 // probably don't need to be.
4161                                 $tool['tip'],
4162                                 $tool['open'],
4163                                 $tool['close'],
4164                                 $tool['sample'],
4165                                 $tool['id'],
4166                         ];
4167
4168                         $script .= Xml::encodeJsCall(
4169                                 'mw.toolbar.addButton',
4170                                 $params,
4171                                 ResourceLoader::inDebugMode()
4172                         );
4173                 }
4174
4175                 $script .= '});';
4176
4177                 $toolbar = '<div id="toolbar"></div>';
4178
4179                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4180                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4181                         // been over-written by a hook caller
4182                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4183                 };
4184
4185                 return $toolbar;
4186         }
4187
4188         /**
4189          * Return an array of checkbox definitions.
4190          *
4191          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4192          *
4193          * Array values are associative arrays with the following keys:
4194          *  - 'label-message' (required): message for label text
4195          *  - 'id' (required): 'id' attribute for the `<input>`
4196          *  - 'default' (required): default checkedness (true or false)
4197          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4198          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4199          *    from messages like 'tooltip-foo', 'accesskey-foo'
4200          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4201          *  - 'legacy-name' (optional): short name for backwards-compatibility
4202          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4203          *   where bool indicates the checked status of the checkbox
4204          * @return array
4205          */
4206         public function getCheckboxesDefinition( $checked ) {
4207                 $checkboxes = [];
4208
4209                 $user = $this->context->getUser();
4210                 // don't show the minor edit checkbox if it's a new page or section
4211                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4212                         $checkboxes['wpMinoredit'] = [
4213                                 'id' => 'wpMinoredit',
4214                                 'label-message' => 'minoredit',
4215                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4216                                 'tooltip' => 'minoredit',
4217                                 'label-id' => 'mw-editpage-minoredit',
4218                                 'legacy-name' => 'minor',
4219                                 'default' => $checked['minor'],
4220                         ];
4221                 }
4222
4223                 if ( $user->isLoggedIn() ) {
4224                         $checkboxes['wpWatchthis'] = [
4225                                 'id' => 'wpWatchthis',
4226                                 'label-message' => 'watchthis',
4227                                 // Uses messages: tooltip-watch, accesskey-watch
4228                                 'tooltip' => 'watch',
4229                                 'label-id' => 'mw-editpage-watch',
4230                                 'legacy-name' => 'watch',
4231                                 'default' => $checked['watch'],
4232                         ];
4233                 }
4234
4235                 $editPage = $this;
4236                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4237
4238                 return $checkboxes;
4239         }
4240
4241         /**
4242          * Returns an array of html code of the following checkboxes old style:
4243          * minor and watch
4244          *
4245          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4246          * @param int &$tabindex Current tabindex
4247          * @param array $checked See getCheckboxesDefinition()
4248          * @return array
4249          */
4250         public function getCheckboxes( &$tabindex, $checked ) {
4251                 wfDeprecated( __METHOD__, '1.30' );
4252                 $checkboxes = [];
4253                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4254
4255                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4256                 if ( !$this->isNew ) {
4257                         $checkboxes['minor'] = '';
4258                 }
4259                 $checkboxes['watch'] = '';
4260
4261                 foreach ( $checkboxesDef as $name => $options ) {
4262                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4263                         $label = $this->context->msg( $options['label-message'] )->parse();
4264                         $attribs = [
4265                                 'tabindex' => ++$tabindex,
4266                                 'id' => $options['id'],
4267                         ];
4268                         $labelAttribs = [
4269                                 'for' => $options['id'],
4270                         ];
4271                         if ( isset( $options['tooltip'] ) ) {
4272                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4273                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4274                         }
4275                         if ( isset( $options['title-message'] ) ) {
4276                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4277                         }
4278                         if ( isset( $options['label-id'] ) ) {
4279                                 $labelAttribs['id'] = $options['label-id'];
4280                         }
4281                         $checkboxHtml =
4282                                 Xml::check( $name, $options['default'], $attribs ) .
4283                                 '&#160;' .
4284                                 Xml::tags( 'label', $labelAttribs, $label );
4285
4286                         $checkboxes[ $legacyName ] = $checkboxHtml;
4287                 }
4288
4289                 // Avoid PHP 7.1 warning of passing $this by reference
4290                 $editPage = $this;
4291                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4292                 return $checkboxes;
4293         }
4294
4295         /**
4296          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4297          * any other added by extensions.
4298          *
4299          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4300          * @param int &$tabindex Current tabindex
4301          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4302          *                 status of the checkbox
4303          *
4304          * @return array Associative array of string keys to OOUI\FieldLayout instances
4305          */
4306         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4307                 wfDeprecated( __METHOD__, '1.30' );
4308                 return $this->getCheckboxesWidget( $tabindex, $checked );
4309         }
4310
4311         /**
4312          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4313          * any other added by extensions.
4314          *
4315          * @param int &$tabindex Current tabindex
4316          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4317          *                 status of the checkbox
4318          *
4319          * @return array Associative array of string keys to OOUI\FieldLayout instances
4320          */
4321         public function getCheckboxesWidget( &$tabindex, $checked ) {
4322                 $checkboxes = [];
4323                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4324
4325                 foreach ( $checkboxesDef as $name => $options ) {
4326                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4327
4328                         $title = null;
4329                         $accesskey = null;
4330                         if ( isset( $options['tooltip'] ) ) {
4331                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4332                                 $title = Linker::titleAttrib( $options['tooltip'] );
4333                         }
4334                         if ( isset( $options['title-message'] ) ) {
4335                                 $title = $this->context->msg( $options['title-message'] )->text();
4336                         }
4337
4338                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4339                                 new OOUI\CheckboxInputWidget( [
4340                                         'tabIndex' => ++$tabindex,
4341                                         'accessKey' => $accesskey,
4342                                         'id' => $options['id'] . 'Widget',
4343                                         'inputId' => $options['id'],
4344                                         'name' => $name,
4345                                         'selected' => $options['default'],
4346                                         'infusable' => true,
4347                                 ] ),
4348                                 [
4349                                         'align' => 'inline',
4350                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4351                                         'title' => $title,
4352                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4353                                 ]
4354                         );
4355                 }
4356
4357                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4358                 // people have used it for the weirdest things completely unrelated to checkboxes...
4359                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4360                 $legacyCheckboxes = [];
4361                 if ( !$this->isNew ) {
4362                         $legacyCheckboxes['minor'] = '';
4363                 }
4364                 $legacyCheckboxes['watch'] = '';
4365                 // Copy new-style checkboxes into an old-style structure
4366                 foreach ( $checkboxes as $name => $oouiLayout ) {
4367                         $legacyCheckboxes[$name] = (string)$oouiLayout;
4368                 }
4369                 // Avoid PHP 7.1 warning of passing $this by reference
4370                 $ep = $this;
4371                 Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
4372                 // Copy back any additional old-style checkboxes into the new-style structure
4373                 foreach ( $legacyCheckboxes as $name => $html ) {
4374                         if ( $html && !isset( $checkboxes[$name] ) ) {
4375                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4376                         }
4377                 }
4378
4379                 return $checkboxes;
4380         }
4381
4382         /**
4383          * Get the message key of the label for the button to save the page
4384          *
4385          * @since 1.30
4386          * @return string
4387          */
4388         protected function getSubmitButtonLabel() {
4389                 $labelAsPublish =
4390                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4391
4392                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4393                 $newPage = !$this->mTitle->exists();
4394
4395                 if ( $labelAsPublish ) {
4396                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4397                 } else {
4398                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4399                 }
4400
4401                 return $buttonLabelKey;
4402         }
4403
4404         /**
4405          * Returns an array of html code of the following buttons:
4406          * save, diff and preview
4407          *
4408          * @param int &$tabindex Current tabindex
4409          *
4410          * @return array
4411          */
4412         public function getEditButtons( &$tabindex ) {
4413                 $buttons = [];
4414
4415                 $labelAsPublish =
4416                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4417
4418                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4419                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4420
4421                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4422                         'name' => 'wpSave',
4423                         'tabIndex' => ++$tabindex,
4424                         'id' => 'wpSaveWidget',
4425                         'inputId' => 'wpSave',
4426                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4427                         'useInputTag' => true,
4428                         'flags' => [ 'progressive', 'primary' ],
4429                         'label' => $buttonLabel,
4430                         'infusable' => true,
4431                         'type' => 'submit',
4432                         // Messages used: tooltip-save, tooltip-publish
4433                         'title' => Linker::titleAttrib( $buttonTooltip ),
4434                         // Messages used: accesskey-save, accesskey-publish
4435                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4436                 ] );
4437
4438                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4439                         'name' => 'wpPreview',
4440                         'tabIndex' => ++$tabindex,
4441                         'id' => 'wpPreviewWidget',
4442                         'inputId' => 'wpPreview',
4443                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4444                         'useInputTag' => true,
4445                         'label' => $this->context->msg( 'showpreview' )->text(),
4446                         'infusable' => true,
4447                         'type' => 'submit',
4448                         // Message used: tooltip-preview
4449                         'title' => Linker::titleAttrib( 'preview' ),
4450                         // Message used: accesskey-preview
4451                         'accessKey' => Linker::accesskey( 'preview' ),
4452                 ] );
4453
4454                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4455                         'name' => 'wpDiff',
4456                         'tabIndex' => ++$tabindex,
4457                         'id' => 'wpDiffWidget',
4458                         'inputId' => 'wpDiff',
4459                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4460                         'useInputTag' => true,
4461                         'label' => $this->context->msg( 'showdiff' )->text(),
4462                         'infusable' => true,
4463                         'type' => 'submit',
4464                         // Message used: tooltip-diff
4465                         'title' => Linker::titleAttrib( 'diff' ),
4466                         // Message used: accesskey-diff
4467                         'accessKey' => Linker::accesskey( 'diff' ),
4468                 ] );
4469
4470                 // Avoid PHP 7.1 warning of passing $this by reference
4471                 $editPage = $this;
4472                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4473
4474                 return $buttons;
4475         }
4476
4477         /**
4478          * Creates a basic error page which informs the user that
4479          * they have attempted to edit a nonexistent section.
4480          */
4481         public function noSuchSectionPage() {
4482                 $out = $this->context->getOutput();
4483                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4484
4485                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4486
4487                 // Avoid PHP 7.1 warning of passing $this by reference
4488                 $editPage = $this;
4489                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4490                 $out->addHTML( $res );
4491
4492                 $out->returnToMain( false, $this->mTitle );
4493         }
4494
4495         /**
4496          * Show "your edit contains spam" page with your diff and text
4497          *
4498          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4499          */
4500         public function spamPageWithContent( $match = false ) {
4501                 $this->textbox2 = $this->textbox1;
4502
4503                 if ( is_array( $match ) ) {
4504                         $match = $this->context->getLanguage()->listToText( $match );
4505                 }
4506                 $out = $this->context->getOutput();
4507                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4508
4509                 $out->addHTML( '<div id="spamprotected">' );
4510                 $out->addWikiMsg( 'spamprotectiontext' );
4511                 if ( $match ) {
4512                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4513                 }
4514                 $out->addHTML( '</div>' );
4515
4516                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4517                 $this->showDiff();
4518
4519                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4520                 $this->showTextbox2();
4521
4522                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4523         }
4524
4525         /**
4526          * Filter an input field through a Unicode de-armoring process if it
4527          * came from an old browser with known broken Unicode editing issues.
4528          *
4529          * @deprecated since 1.30, does nothing
4530          *
4531          * @param WebRequest $request
4532          * @param string $field
4533          * @return string
4534          */
4535         protected function safeUnicodeInput( $request, $field ) {
4536                 return rtrim( $request->getText( $field ) );
4537         }
4538
4539         /**
4540          * Filter an output field through a Unicode armoring process if it is
4541          * going to an old browser with known broken Unicode editing issues.
4542          *
4543          * @deprecated since 1.30, does nothing
4544          *
4545          * @param string $text
4546          * @return string
4547          */
4548         protected function safeUnicodeOutput( $text ) {
4549                 return $text;
4550         }
4551
4552         /**
4553          * @since 1.29
4554          */
4555         protected function addEditNotices() {
4556                 $out = $this->context->getOutput();
4557                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4558                 if ( count( $editNotices ) ) {
4559                         $out->addHTML( implode( "\n", $editNotices ) );
4560                 } else {
4561                         $msg = $this->context->msg( 'editnotice-notext' );
4562                         if ( !$msg->isDisabled() ) {
4563                                 $out->addHTML(
4564                                         '<div class="mw-editnotice-notext">'
4565                                         . $msg->parseAsBlock()
4566                                         . '</div>'
4567                                 );
4568                         }
4569                 }
4570         }
4571
4572         /**
4573          * @since 1.29
4574          */
4575         protected function addTalkPageText() {
4576                 if ( $this->mTitle->isTalkPage() ) {
4577                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4578                 }
4579         }
4580
4581         /**
4582          * @since 1.29
4583          */
4584         protected function addLongPageWarningHeader() {
4585                 if ( $this->contentLength === false ) {
4586                         $this->contentLength = strlen( $this->textbox1 );
4587                 }
4588
4589                 $out = $this->context->getOutput();
4590                 $lang = $this->context->getLanguage();
4591                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4592                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4593                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4594                                 [
4595                                         'longpageerror',
4596                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4597                                         $lang->formatNum( $maxArticleSize )
4598                                 ]
4599                         );
4600                 } else {
4601                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4602                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4603                                         [
4604                                                 'longpage-hint',
4605                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4606                                                 strlen( $this->textbox1 )
4607                                         ]
4608                                 );
4609                         }
4610                 }
4611         }
4612
4613         /**
4614          * @since 1.29
4615          */
4616         protected function addPageProtectionWarningHeaders() {
4617                 $out = $this->context->getOutput();
4618                 if ( $this->mTitle->isProtected( 'edit' ) &&
4619                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4620                 ) {
4621                         # Is the title semi-protected?
4622                         if ( $this->mTitle->isSemiProtected() ) {
4623                                 $noticeMsg = 'semiprotectedpagewarning';
4624                         } else {
4625                                 # Then it must be protected based on static groups (regular)
4626                                 $noticeMsg = 'protectedpagewarning';
4627                         }
4628                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4629                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4630                 }
4631                 if ( $this->mTitle->isCascadeProtected() ) {
4632                         # Is this page under cascading protection from some source pages?
4633                         /** @var Title[] $cascadeSources */
4634                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4635                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4636                         $cascadeSourcesCount = count( $cascadeSources );
4637                         if ( $cascadeSourcesCount > 0 ) {
4638                                 # Explain, and list the titles responsible
4639                                 foreach ( $cascadeSources as $page ) {
4640                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4641                                 }
4642                         }
4643                         $notice .= '</div>';
4644                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4645                 }
4646                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4647                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4648                                 [ 'lim' => 1,
4649                                         'showIfEmpty' => false,
4650                                         'msgKey' => [ 'titleprotectedwarning' ],
4651                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4652                 }
4653         }
4654
4655         /**
4656          * @param OutputPage $out
4657          * @since 1.29
4658          */
4659         protected function addExplainConflictHeader( OutputPage $out ) {
4660                 $out->addHTML(
4661                         $this->getEditConflictHelper()->getExplainHeader()
4662                 );
4663         }
4664
4665         /**
4666          * @param string $name
4667          * @param mixed[] $customAttribs
4668          * @param User $user
4669          * @return mixed[]
4670          * @since 1.29
4671          */
4672         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4673                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4674                         $name, $customAttribs, $user, $this->mTitle
4675                 );
4676         }
4677
4678         /**
4679          * @param string $wikitext
4680          * @return string
4681          * @since 1.29
4682          */
4683         protected function addNewLineAtEnd( $wikitext ) {
4684                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4685         }
4686
4687         /**
4688          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4689          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4690          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4691          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4692          * spread the new style links more efficiently.
4693          *
4694          * @param string $text
4695          * @return string
4696          */
4697         private function guessSectionName( $text ) {
4698                 global $wgParser;
4699
4700                 // Detect Microsoft browsers
4701                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4702                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4703                         // ...and redirect them to legacy encoding, if available
4704                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4705                 }
4706                 // Meanwhile, real browsers get real anchors
4707                 return $wgParser->guessSectionNameFromWikiText( $text );
4708         }
4709
4710         /**
4711          * Set a factory function to create an EditConflictHelper
4712          *
4713          * @param callable $factory Factory function
4714          * @since 1.31
4715          */
4716         public function setEditConflictHelperFactory( callable $factory ) {
4717                 $this->editConflictHelperFactory = $factory;
4718                 $this->editConflictHelper = null;
4719         }
4720
4721         /**
4722          * @return TextConflictHelper
4723          */
4724         private function getEditConflictHelper() {
4725                 if ( !$this->editConflictHelper ) {
4726                         $this->editConflictHelper = call_user_func(
4727                                 $this->editConflictHelperFactory,
4728                                 $this->getSubmitButtonLabel()
4729                         );
4730                 }
4731
4732                 return $this->editConflictHelper;
4733         }
4734
4735         /**
4736          * @param string $submitButtonLabel
4737          * @return TextConflictHelper
4738          */
4739         private function newTextConflictHelper( $submitButtonLabel ) {
4740                 return new TextConflictHelper(
4741                         $this->getTitle(),
4742                         $this->getContext()->getOutput(),
4743                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4744                         $submitButtonLabel
4745                 );
4746         }
4747 }