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 Whether an edit conflict needs to be resolved. Detected based on whether
 239          * $editRevId is different than the latest revision. When a conflict has successfully
 240          * been resolved by a 3-way-merge, this field is set to false.
 241          */
 242         public $isConflict = false;
 243
 244         /** @var bool New page or new section */
 245         public $isNew = false;
 246
 247         /** @var bool */
 248         public $deletedSinceEdit;
 249
 250         /** @var string */
 251         public $formtype;
 252
 253         /** @var bool
 254          * True the first time the edit form is rendered, false after re-rendering
 255          * with diff, save prompts, etc.
 256          */
 257         public $firsttime;
 258
 259         /** @var bool|stdClass */
 260         public $lastDelete;
 261
 262         /** @var bool */
 263         public $mTokenOk = false;
 264
 265         /** @var bool */
 266         public $mTokenOkExceptSuffix = false;
 267
 268         /** @var bool */
 269         public $mTriedSave = false;
 270
 271         /** @var bool */
 272         public $incompleteForm = false;
 273
 274         /** @var bool */
 275         public $tooBig = false;
 276
 277         /** @var bool */
 278         public $missingComment = false;
 279
 280         /** @var bool */
 281         public $missingSummary = false;
 282
 283         /** @var bool */
 284         public $allowBlankSummary = false;
 285
 286         /** @var bool */
 287         protected $blankArticle = false;
 288
 289         /** @var bool */
 290         protected $allowBlankArticle = false;
 291
 292         /** @var bool */
 293         protected $selfRedirect = false;
 294
 295         /** @var bool */
 296         protected $allowSelfRedirect = false;
 297
 298         /** @var string */
 299         public $autoSumm = '';
 300
 301         /** @var string */
 302         public $hookError = '';
 303
 304         /** @var ParserOutput */
 305         public $mParserOutput;
 306
 307         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 308         public $hasPresetSummary = false;
 309
 310         /** @var Revision|bool|null A revision object corresponding to $this->editRevId. */
 311         public $mBaseRevision = false;
 312
 313         /** @var bool */
 314         public $mShowSummaryField = true;
 315
 316         # Form values
 317
 318         /** @var bool */
 319         public $save = false;
 320
 321         /** @var bool */
 322         public $preview = false;
 323
 324         /** @var bool */
 325         public $diff = false;
 326
 327         /** @var bool */
 328         public $minoredit = false;
 329
 330         /** @var bool */
 331         public $watchthis = false;
 332
 333         /** @var bool */
 334         public $recreate = false;
 335
 336         /** @var string
 337          * Page content input field.
 338          */
 339         public $textbox1 = '';
 340
 341         /** @var string */
 342         public $textbox2 = '';
 343
 344         /** @var string */
 345         public $summary = '';
 346
 347         /** @var bool
 348          * If true, hide the summary field.
 349          */
 350         public $nosummary = false;
 351
 352         /** @var string
 353          * Timestamp of the latest revision of the page when editing was initiated
 354          * on the client.
 355          */
 356         public $edittime = '';
 357
 358         /** @var int Revision ID of the latest revision of the page when editing
 359          * was initiated on the client.  This is used to detect and resolve edit
 360          * conflicts.
 361          *
 362          * @note 0 if the page did not exist at that time.
 363          * @note When starting an edit from an old revision, this still records the current
 364          * revision at the time, not the one the edit is based on.
 365          *
 366          * @see $oldid
 367          * @see getBaseRevision()
 368          */
 369         private $editRevId = null;
 370
 371         /** @var string */
 372         public $section = '';
 373
 374         /** @var string */
 375         public $sectiontitle = '';
 376
 377         /** @var string
 378          * Timestamp from the first time the edit form was rendered.
 379          */
 380         public $starttime = '';
 381
 382         /** @var int Revision ID the edit is based on, or 0 if it's the current revision.
 383          * FIXME: This isn't used in conflict resolution--provide a better
 384          * justification or merge with parentRevId.
 385          * @see $editRevId
 386          */
 387         public $oldid = 0;
 388
 389         /** @var int Revision ID the edit is based on, adjusted when an edit conflict is resolved.
 390          * @see $editRevId
 391          * @see $oldid
 392          * @see getparentRevId()
 393          */
 394         public $parentRevId = 0;
 395
 396         /** @var string */
 397         public $editintro = '';
 398
 399         /** @var null */
 400         public $scrolltop = null;
 401
 402         /** @var bool */
 403         public $bot = true;
 404
 405         /** @var string */
 406         public $contentModel;
 407
 408         /** @var null|string */
 409         public $contentFormat = null;
 410
 411         /** @var null|array */
 412         private $changeTags = null;
 413
 414         # Placeholders for text injection by hooks (must be HTML)
 415         # extensions should take care to _append_ to the present value
 416
 417         /** @var string Before even the preview */
 418         public $editFormPageTop = '';
 419         public $editFormTextTop = '';
 420         public $editFormTextBeforeContent = '';
 421         public $editFormTextAfterWarn = '';
 422         public $editFormTextAfterTools = '';
 423         public $editFormTextBottom = '';
 424         public $editFormTextAfterContent = '';
 425         public $previewTextAfterContent = '';
 426         public $mPreloadContent = null;
 427
 428         /* $didSave should be set to true whenever an article was successfully altered. */
 429         public $didSave = false;
 430         public $undidRev = 0;
 431
 432         public $suppressIntro = false;
 433
 434         /** @var bool */
 435         protected $edit;
 436
 437         /** @var bool|int */
 438         protected $contentLength = false;
 439
 440         /**
 441          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 442          */
 443         private $enableApiEditOverride = false;
 444
 445         /**
 446          * @var IContextSource
 447          */
 448         protected $context;
 449
 450         /**
 451          * @var bool Whether an old revision is edited
 452          */
 453         private $isOldRev = false;
 454
 455         /**
 456          * @var string|null What the user submitted in the 'wpUnicodeCheck' field
 457          */
 458         private $unicodeCheck;
 459
 460         /**
 461          * Factory function to create an edit conflict helper
 462          *
 463          * @var callable
 464          */
 465         private $editConflictHelperFactory;
 466
 467         /**
 468          * @var TextConflictHelper|null
 469          */
 470         private $editConflictHelper;
 471
 472         /**
 473          * @param Article $article
 474          */
 475         public function __construct( Article $article ) {
 476                 $this->mArticle = $article;
 477                 $this->page = $article->getPage(); // model object
 478                 $this->mTitle = $article->getTitle();
 479                 $this->context = $article->getContext();
 480
 481                 $this->contentModel = $this->mTitle->getContentModel();
 482
 483                 $handler = ContentHandler::getForModelID( $this->contentModel );
 484                 $this->contentFormat = $handler->getDefaultFormat();
 485                 $this->editConflictHelperFactory = [ $this, 'newTextConflictHelper' ];
 486         }
 487
 488         /**
 489          * @return Article
 490          */
 491         public function getArticle() {
 492                 return $this->mArticle;
 493         }
 494
 495         /**
 496          * @since 1.28
 497          * @return IContextSource
 498          */
 499         public function getContext() {
 500                 return $this->context;
 501         }
 502
 503         /**
 504          * @since 1.19
 505          * @return Title
 506          */
 507         public function getTitle() {
 508                 return $this->mTitle;
 509         }
 510
 511         /**
 512          * Set the context Title object
 513          *
 514          * @param Title|null $title Title object or null
 515          */
 516         public function setContextTitle( $title ) {
 517                 $this->mContextTitle = $title;
 518         }
 519
 520         /**
 521          * Get the context title object.
 522          *
 523          * If not set, $wgTitle will be returned, but this is deprecated. This will
 524          * throw an exception.
 525          *
 526          * @return Title
 527          */
 528         public function getContextTitle() {
 529                 if ( is_null( $this->mContextTitle ) ) {
 530                         wfDeprecated( __METHOD__ . ' called with no title set', '1.32' );
 531                         global $wgTitle;
 532                         return $wgTitle;
 533                 } else {
 534                         return $this->mContextTitle;
 535                 }
 536         }
 537
 538         /**
 539          * Returns if the given content model is editable.
 540          *
 541          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 542          * @return bool
 543          * @throws MWException If $modelId has no known handler
 544          */
 545         public function isSupportedContentModel( $modelId ) {
 546                 return $this->enableApiEditOverride === true ||
 547                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 548         }
 549
 550         /**
 551          * Allow editing of content that supports API direct editing, but not general
 552          * direct editing. Set to false by default.
 553          *
 554          * @param bool $enableOverride
 555          */
 556         public function setApiEditOverride( $enableOverride ) {
 557                 $this->enableApiEditOverride = $enableOverride;
 558         }
 559
 560         /**
 561          * @deprecated since 1.29, call edit directly
 562          */
 563         public function submit() {
 564                 wfDeprecated( __METHOD__, '1.29' );
 565                 $this->edit();
 566         }
 567
 568         /**
 569          * This is the function that gets called for "action=edit". It
 570          * sets up various member variables, then passes execution to
 571          * another function, usually showEditForm()
 572          *
 573          * The edit form is self-submitting, so that when things like
 574          * preview and edit conflicts occur, we get the same form back
 575          * with the extra stuff added.  Only when the final submission
 576          * is made and all is well do we actually save and redirect to
 577          * the newly-edited page.
 578          */
 579         public function edit() {
 580                 // Allow extensions to modify/prevent this form or submission
 581                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 582                         return;
 583                 }
 584
 585                 wfDebug( __METHOD__ . ": enter\n" );
 586
 587                 $request = $this->context->getRequest();
 588                 // If they used redlink=1 and the page exists, redirect to the main article
 589                 if ( $request->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 590                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 591                         return;
 592                 }
 593
 594                 $this->importFormData( $request );
 595                 $this->firsttime = false;
 596
 597                 if ( wfReadOnly() && $this->save ) {
 598                         // Force preview
 599                         $this->save = false;
 600                         $this->preview = true;
 601                 }
 602
 603                 if ( $this->save ) {
 604                         $this->formtype = 'save';
 605                 } elseif ( $this->preview ) {
 606                         $this->formtype = 'preview';
 607                 } elseif ( $this->diff ) {
 608                         $this->formtype = 'diff';
 609                 } else { # First time through
 610                         $this->firsttime = true;
 611                         if ( $this->previewOnOpen() ) {
 612                                 $this->formtype = 'preview';
 613                         } else {
 614                                 $this->formtype = 'initial';
 615                         }
 616                 }
 617
 618                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 619                 if ( $permErrors ) {
 620                         wfDebug( __METHOD__ . ": User can't edit\n" );
 621
 622                         // track block with a cookie if it doesn't exists already
 623                         $this->context->getUser()->trackBlockWithCookie();
 624
 625                         // Auto-block user's IP if the account was "hard" blocked
 626                         if ( !wfReadOnly() ) {
 627                                 DeferredUpdates::addCallableUpdate( function () {
 628                                         $this->context->getUser()->spreadAnyEditBlock();
 629                                 } );
 630                         }
 631                         $this->displayPermissionsError( $permErrors );
 632
 633                         return;
 634                 }
 635
 636                 $revision = $this->mArticle->getRevisionFetched();
 637                 // Disallow editing revisions with content models different from the current one
 638                 // Undo edits being an exception in order to allow reverting content model changes.
 639                 if ( $revision
 640                         && $revision->getContentModel() !== $this->contentModel
 641                 ) {
 642                         $prevRev = null;
 643                         if ( $this->undidRev ) {
 644                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 645                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 646                         }
 647                         if ( !$this->undidRev
 648                                 || !$prevRev
 649                                 || $prevRev->getContentModel() !== $this->contentModel
 650                         ) {
 651                                 $this->displayViewSourcePage(
 652                                         $this->getContentObject(),
 653                                         $this->context->msg(
 654                                                 'contentmodelediterror',
 655                                                 $revision->getContentModel(),
 656                                                 $this->contentModel
 657                                         )->plain()
 658                                 );
 659                                 return;
 660                         }
 661                 }
 662
 663                 $this->isConflict = false;
 664
 665                 # Show applicable editing introductions
 666                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 667                         $this->showIntro();
 668                 }
 669
 670                 # Attempt submission here.  This will check for edit conflicts,
 671                 # and redundantly check for locked database, blocked IPs, etc.
 672                 # that edit() already checked just in case someone tries to sneak
 673                 # in the back door with a hand-edited submission URL.
 674
 675                 if ( 'save' == $this->formtype ) {
 676                         $resultDetails = null;
 677                         $status = $this->attemptSave( $resultDetails );
 678                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 679                                 return;
 680                         }
 681                 }
 682
 683                 # First time through: get contents, set time for conflict
 684                 # checking, etc.
 685                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 686                         if ( $this->initialiseForm() === false ) {
 687                                 $this->noSuchSectionPage();
 688                                 return;
 689                         }
 690
 691                         if ( !$this->mTitle->getArticleID() ) {
 692                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 693                         } else {
 694                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 695                         }
 696
 697                 }
 698
 699                 $this->showEditForm();
 700         }
 701
 702         /**
 703          * @param string $rigor Same format as Title::getUserPermissionErrors()
 704          * @return array
 705          */
 706         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 707                 $user = $this->context->getUser();
 708                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user, $rigor );
 709                 # Can this title be created?
 710                 if ( !$this->mTitle->exists() ) {
 711                         $permErrors = array_merge(
 712                                 $permErrors,
 713                                 wfArrayDiff2(
 714                                         $this->mTitle->getUserPermissionsErrors( 'create', $user, $rigor ),
 715                                         $permErrors
 716                                 )
 717                         );
 718                 }
 719                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 720                 $remove = [];
 721                 foreach ( $permErrors as $error ) {
 722                         if ( ( $this->preview || $this->diff )
 723                                 && (
 724                                         $error[0] == 'blockedtext' ||
 725                                         $error[0] == 'autoblockedtext' ||
 726                                         $error[0] == 'systemblockedtext'
 727                                 )
 728                         ) {
 729                                 $remove[] = $error;
 730                         }
 731                 }
 732                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 733
 734                 return $permErrors;
 735         }
 736
 737         /**
 738          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 739          * but with the following differences:
 740          * - If redlink=1, the user will be redirected to the page
 741          * - If there is content to display or the error occurs while either saving,
 742          *   previewing or showing the difference, it will be a
 743          *   "View source for ..." page displaying the source code after the error message.
 744          *
 745          * @since 1.19
 746          * @param array $permErrors Array of permissions errors, as returned by
 747          *    Title::getUserPermissionsErrors().
 748          * @throws PermissionsError
 749          */
 750         protected function displayPermissionsError( array $permErrors ) {
 751                 $out = $this->context->getOutput();
 752                 if ( $this->context->getRequest()->getBool( 'redlink' ) ) {
 753                         // The edit page was reached via a red link.
 754                         // Redirect to the article page and let them click the edit tab if
 755                         // they really want a permission error.
 756                         $out->redirect( $this->mTitle->getFullURL() );
 757                         return;
 758                 }
 759
 760                 $content = $this->getContentObject();
 761
 762                 # Use the normal message if there's nothing to display
 763                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 764                         $action = $this->mTitle->exists() ? 'edit' :
 765                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 766                         throw new PermissionsError( $action, $permErrors );
 767                 }
 768
 769                 $this->displayViewSourcePage(
 770                         $content,
 771                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 772                 );
 773         }
 774
 775         /**
 776          * Display a read-only View Source page
 777          * @param Content $content
 778          * @param string $errorMessage additional wikitext error message to display
 779          */
 780         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 781                 $out = $this->context->getOutput();
 782                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 783
 784                 $out->setRobotPolicy( 'noindex,nofollow' );
 785                 $out->setPageTitle( $this->context->msg(
 786                         'viewsource-title',
 787                         $this->getContextTitle()->getPrefixedText()
 788                 ) );
 789                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 790                 $out->addHTML( $this->editFormPageTop );
 791                 $out->addHTML( $this->editFormTextTop );
 792
 793                 if ( $errorMessage !== '' ) {
 794                         $out->addWikiText( $errorMessage );
 795                         $out->addHTML( "<hr />\n" );
 796                 }
 797
 798                 # If the user made changes, preserve them when showing the markup
 799                 # (This happens when a user is blocked during edit, for instance)
 800                 if ( !$this->firsttime ) {
 801                         $text = $this->textbox1;
 802                         $out->addWikiMsg( 'viewyourtext' );
 803                 } else {
 804                         try {
 805                                 $text = $this->toEditText( $content );
 806                         } catch ( MWException $e ) {
 807                                 # Serialize using the default format if the content model is not supported
 808                                 # (e.g. for an old revision with a different model)
 809                                 $text = $content->serialize();
 810                         }
 811                         $out->addWikiMsg( 'viewsourcetext' );
 812                 }
 813
 814                 $out->addHTML( $this->editFormTextBeforeContent );
 815                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 816                 $out->addHTML( $this->editFormTextAfterContent );
 817
 818                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 819
 820                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 821
 822                 $out->addHTML( $this->editFormTextBottom );
 823                 if ( $this->mTitle->exists() ) {
 824                         $out->returnToMain( null, $this->mTitle );
 825                 }
 826         }
 827
 828         /**
 829          * Should we show a preview when the edit form is first shown?
 830          *
 831          * @return bool
 832          */
 833         protected function previewOnOpen() {
 834                 $config = $this->context->getConfig();
 835                 $previewOnOpenNamespaces = $config->get( 'PreviewOnOpenNamespaces' );
 836                 $request = $this->context->getRequest();
 837                 if ( $config->get( 'RawHtml' ) ) {
 838                         // If raw HTML is enabled, disable preview on open
 839                         // since it has to be posted with a token for
 840                         // security reasons
 841                         return false;
 842                 }
 843                 if ( $request->getVal( 'preview' ) == 'yes' ) {
 844                         // Explicit override from request
 845                         return true;
 846                 } elseif ( $request->getVal( 'preview' ) == 'no' ) {
 847                         // Explicit override from request
 848                         return false;
 849                 } elseif ( $this->section == 'new' ) {
 850                         // Nothing *to* preview for new sections
 851                         return false;
 852                 } elseif ( ( $request->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 853                         && $this->context->getUser()->getOption( 'previewonfirst' )
 854                 ) {
 855                         // Standard preference behavior
 856                         return true;
 857                 } elseif ( !$this->mTitle->exists()
 858                         && isset( $previewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 859                         && $previewOnOpenNamespaces[$this->mTitle->getNamespace()]
 860                 ) {
 861                         // Categories are special
 862                         return true;
 863                 } else {
 864                         return false;
 865                 }
 866         }
 867
 868         /**
 869          * Checks whether the user entered a skin name in uppercase,
 870          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 871          *
 872          * @return bool
 873          */
 874         protected function isWrongCaseUserConfigPage() {
 875                 if ( $this->mTitle->isUserConfigPage() ) {
 876                         $name = $this->mTitle->getSkinFromConfigSubpage();
 877                         $skins = array_merge(
 878                                 array_keys( Skin::getSkinNames() ),
 879                                 [ 'common' ]
 880                         );
 881                         return !in_array( $name, $skins )
 882                                 && in_array( strtolower( $name ), $skins );
 883                 } else {
 884                         return false;
 885                 }
 886         }
 887
 888         /**
 889          * Returns whether section editing is supported for the current page.
 890          * Subclasses may override this to replace the default behavior, which is
 891          * to check ContentHandler::supportsSections.
 892          *
 893          * @return bool True if this edit page supports sections, false otherwise.
 894          */
 895         protected function isSectionEditSupported() {
 896                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 897                 return $contentHandler->supportsSections();
 898         }
 899
 900         /**
 901          * This function collects the form data and uses it to populate various member variables.
 902          * @param WebRequest &$request
 903          * @throws ErrorPageError
 904          */
 905         public function importFormData( &$request ) {
 906                 # Section edit can come from either the form or a link
 907                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 908
 909                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 910                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 911                 }
 912
 913                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 914
 915                 if ( $request->wasPosted() ) {
 916                         # These fields need to be checked for encoding.
 917                         # Also remove trailing whitespace, but don't remove _initial_
 918                         # whitespace from the text boxes. This may be significant formatting.
 919                         $this->textbox1 = rtrim( $request->getText( 'wpTextbox1' ) );
 920                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 921                                 // Skip this if wpTextbox2 has input, it indicates that we came
 922                                 // from a conflict page with raw page text, not a custom form
 923                                 // modified by subclasses
 924                                 $textbox1 = $this->importContentFormData( $request );
 925                                 if ( $textbox1 !== null ) {
 926                                         $this->textbox1 = $textbox1;
 927                                 }
 928                         }
 929
 930                         $this->unicodeCheck = $request->getText( 'wpUnicodeCheck' );
 931
 932                         $this->summary = $request->getText( 'wpSummary' );
 933
 934                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 935                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 936                         # section titles.
 937                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 938
 939                         # Treat sectiontitle the same way as summary.
 940                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 941                         # currently doing double duty as both edit summary and section title. Right now this
 942                         # is just to allow API edits to work around this limitation, but this should be
 943                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 944                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 945                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 946
 947                         $this->edittime = $request->getVal( 'wpEdittime' );
 948                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 949                         $this->starttime = $request->getVal( 'wpStarttime' );
 950
 951                         $undidRev = $request->getInt( 'wpUndidRevision' );
 952                         if ( $undidRev ) {
 953                                 $this->undidRev = $undidRev;
 954                         }
 955
 956                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 957
 958                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 959                                 // wpTextbox1 field is missing, possibly due to being "too big"
 960                                 // according to some filter rules such as Suhosin's setting for
 961                                 // suhosin.request.max_value_length (d'oh)
 962                                 $this->incompleteForm = true;
 963                         } else {
 964                                 // If we receive the last parameter of the request, we can fairly
 965                                 // claim the POST request has not been truncated.
 966                                 $this->incompleteForm = !$request->getVal( 'wpUltimateParam' );
 967                         }
 968                         if ( $this->incompleteForm ) {
 969                                 # If the form is incomplete, force to preview.
 970                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 971                                 wfDebug( "POST DATA: " . var_export( $request->getPostValues(), true ) . "\n" );
 972                                 $this->preview = true;
 973                         } else {
 974                                 $this->preview = $request->getCheck( 'wpPreview' );
 975                                 $this->diff = $request->getCheck( 'wpDiff' );
 976
 977                                 // Remember whether a save was requested, so we can indicate
 978                                 // if we forced preview due to session failure.
 979                                 $this->mTriedSave = !$this->preview;
 980
 981                                 if ( $this->tokenOk( $request ) ) {
 982                                         # Some browsers will not report any submit button
 983                                         # if the user hits enter in the comment box.
 984                                         # The unmarked state will be assumed to be a save,
 985                                         # if the form seems otherwise complete.
 986                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 987                                 } elseif ( $this->diff ) {
 988                                         # Failed token check, but only requested "Show Changes".
 989                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 990                                 } else {
 991                                         # Page might be a hack attempt posted from
 992                                         # an external site. Preview instead of saving.
 993                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 994                                         $this->preview = true;
 995                                 }
 996                         }
 997                         $this->save = !$this->preview && !$this->diff;
 998                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 999                                 $this->edittime = null;
1000                         }
1001
1002                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
1003                                 $this->starttime = null;
1004                         }
1005
1006                         $this->recreate = $request->getCheck( 'wpRecreate' );
1007
1008                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
1009                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
1010
1011                         $user = $this->context->getUser();
1012                         # Don't force edit summaries when a user is editing their own user or talk page
1013                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
1014                                 && $this->mTitle->getText() == $user->getName()
1015                         ) {
1016                                 $this->allowBlankSummary = true;
1017                         } else {
1018                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
1019                                         || !$user->getOption( 'forceeditsummary' );
1020                         }
1021
1022                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
1023
1024                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
1025                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
1026
1027                         $changeTags = $request->getVal( 'wpChangeTags' );
1028                         if ( is_null( $changeTags ) || $changeTags === '' ) {
1029                                 $this->changeTags = [];
1030                         } else {
1031                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
1032                                         $changeTags ) ) );
1033                         }
1034                 } else {
1035                         # Not a posted form? Start with nothing.
1036                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
1037                         $this->textbox1 = '';
1038                         $this->summary = '';
1039                         $this->sectiontitle = '';
1040                         $this->edittime = '';
1041                         $this->editRevId = null;
1042                         $this->starttime = wfTimestampNow();
1043                         $this->edit = false;
1044                         $this->preview = false;
1045                         $this->save = false;
1046                         $this->diff = false;
1047                         $this->minoredit = false;
1048                         // Watch may be overridden by request parameters
1049                         $this->watchthis = $request->getBool( 'watchthis', false );
1050                         $this->recreate = false;
1051
1052                         // When creating a new section, we can preload a section title by passing it as the
1053                         // preloadtitle parameter in the URL (T15100)
1054                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1055                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1056                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1057                                 $this->summary = $request->getVal( 'preloadtitle' );
1058                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1059                                 $this->summary = $request->getText( 'summary' );
1060                                 if ( $this->summary !== '' ) {
1061                                         $this->hasPresetSummary = true;
1062                                 }
1063                         }
1064
1065                         if ( $request->getVal( 'minor' ) ) {
1066                                 $this->minoredit = true;
1067                         }
1068                 }
1069
1070                 $this->oldid = $request->getInt( 'oldid' );
1071                 $this->parentRevId = $request->getInt( 'parentRevId' );
1072
1073                 $this->bot = $request->getBool( 'bot', true );
1074                 $this->nosummary = $request->getBool( 'nosummary' );
1075
1076                 // May be overridden by revision.
1077                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1078                 // May be overridden by revision.
1079                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1080
1081                 try {
1082                         $handler = ContentHandler::getForModelID( $this->contentModel );
1083                 } catch ( MWUnknownContentModelException $e ) {
1084                         throw new ErrorPageError(
1085                                 'editpage-invalidcontentmodel-title',
1086                                 'editpage-invalidcontentmodel-text',
1087                                 [ wfEscapeWikiText( $this->contentModel ) ]
1088                         );
1089                 }
1090
1091                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1092                         throw new ErrorPageError(
1093                                 'editpage-notsupportedcontentformat-title',
1094                                 'editpage-notsupportedcontentformat-text',
1095                                 [
1096                                         wfEscapeWikiText( $this->contentFormat ),
1097                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1098                                 ]
1099                         );
1100                 }
1101
1102                 /**
1103                  * @todo Check if the desired model is allowed in this namespace, and if
1104                  *   a transition from the page's current model to the new model is
1105                  *   allowed.
1106                  */
1107
1108                 $this->editintro = $request->getText( 'editintro',
1109                         // Custom edit intro for new sections
1110                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1111
1112                 // Allow extensions to modify form data
1113                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1114         }
1115
1116         /**
1117          * Subpage overridable method for extracting the page content data from the
1118          * posted form to be placed in $this->textbox1, if using customized input
1119          * this method should be overridden and return the page text that will be used
1120          * for saving, preview parsing and so on...
1121          *
1122          * @param WebRequest &$request
1123          * @return string|null
1124          */
1125         protected function importContentFormData( &$request ) {
1126                 return; // Don't do anything, EditPage already extracted wpTextbox1
1127         }
1128
1129         /**
1130          * Initialise form fields in the object
1131          * Called on the first invocation, e.g. when a user clicks an edit link
1132          * @return bool If the requested section is valid
1133          */
1134         public function initialiseForm() {
1135                 $this->edittime = $this->page->getTimestamp();
1136                 $this->editRevId = $this->page->getLatest();
1137
1138                 $content = $this->getContentObject( false ); # TODO: track content object?!
1139                 if ( $content === false ) {
1140                         return false;
1141                 }
1142                 $this->textbox1 = $this->toEditText( $content );
1143
1144                 $user = $this->context->getUser();
1145                 // activate checkboxes if user wants them to be always active
1146                 # Sort out the "watch" checkbox
1147                 if ( $user->getOption( 'watchdefault' ) ) {
1148                         # Watch all edits
1149                         $this->watchthis = true;
1150                 } elseif ( $user->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1151                         # Watch creations
1152                         $this->watchthis = true;
1153                 } elseif ( $user->isWatched( $this->mTitle ) ) {
1154                         # Already watched
1155                         $this->watchthis = true;
1156                 }
1157                 if ( $user->getOption( 'minordefault' ) && !$this->isNew ) {
1158                         $this->minoredit = true;
1159                 }
1160                 if ( $this->textbox1 === false ) {
1161                         return false;
1162                 }
1163                 return true;
1164         }
1165
1166         /**
1167          * @param Content|null $def_content The default value to return
1168          *
1169          * @return Content|null Content on success, $def_content for invalid sections
1170          *
1171          * @since 1.21
1172          */
1173         protected function getContentObject( $def_content = null ) {
1174                 $content = false;
1175
1176                 $user = $this->context->getUser();
1177                 $request = $this->context->getRequest();
1178                 // For message page not locally set, use the i18n message.
1179                 // For other non-existent articles, use preload text if any.
1180                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1181                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1182                                 # If this is a system message, get the default text.
1183                                 $msg = $this->mTitle->getDefaultMessageText();
1184
1185                                 $content = $this->toEditContent( $msg );
1186                         }
1187                         if ( $content === false ) {
1188                                 # If requested, preload some text.
1189                                 $preload = $request->getVal( 'preload',
1190                                         // Custom preload text for new sections
1191                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1192                                 $params = $request->getArray( 'preloadparams', [] );
1193
1194                                 $content = $this->getPreloadedContent( $preload, $params );
1195                         }
1196                 // For existing pages, get text based on "undo" or section parameters.
1197                 } else {
1198                         if ( $this->section != '' ) {
1199                                 // Get section edit text (returns $def_text for invalid sections)
1200                                 $orig = $this->getOriginalContent( $user );
1201                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1202
1203                                 if ( !$content ) {
1204                                         $content = $def_content;
1205                                 }
1206                         } else {
1207                                 $undoafter = $request->getInt( 'undoafter' );
1208                                 $undo = $request->getInt( 'undo' );
1209
1210                                 if ( $undo > 0 && $undoafter > 0 ) {
1211                                         $undorev = Revision::newFromId( $undo );
1212                                         $oldrev = Revision::newFromId( $undoafter );
1213                                         $undoMsg = null;
1214
1215                                         # Sanity check, make sure it's the right page,
1216                                         # the revisions exist and they were not deleted.
1217                                         # Otherwise, $content will be left as-is.
1218                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1219                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1220                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1221                                         ) {
1222                                                 if ( WikiPage::hasDifferencesOutsideMainSlot( $undorev, $oldrev ) ) {
1223                                                         // Cannot yet undo edits that involve anything other the main slot.
1224                                                         $undoMsg = 'main-slot-only';
1225                                                 } else {
1226                                                         $content = $this->page->getUndoContent( $undorev, $oldrev );
1227
1228                                                         if ( $content === false ) {
1229                                                                 # Warn the user that something went wrong
1230                                                                 $undoMsg = 'failure';
1231                                                         }
1232                                                 }
1233
1234                                                 if ( $undoMsg === null ) {
1235                                                         $oldContent = $this->page->getContent( Revision::RAW );
1236                                                         $popts = ParserOptions::newFromUserAndLang(
1237                                                                 $user, MediaWikiServices::getInstance()->getContentLanguage() );
1238                                                         $newContent = $content->preSaveTransform( $this->mTitle, $user, $popts );
1239                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1240                                                                 // The undo may change content
1241                                                                 // model if its reverting the top
1242                                                                 // edit. This can result in
1243                                                                 // mismatched content model/format.
1244                                                                 $this->contentModel = $newContent->getModel();
1245                                                                 $this->contentFormat = $oldrev->getContentFormat();
1246                                                         }
1247
1248                                                         if ( $newContent->equals( $oldContent ) ) {
1249                                                                 # Tell the user that the undo results in no change,
1250                                                                 # i.e. the revisions were already undone.
1251                                                                 $undoMsg = 'nochange';
1252                                                                 $content = false;
1253                                                         } else {
1254                                                                 # Inform the user of our success and set an automatic edit summary
1255                                                                 $undoMsg = 'success';
1256
1257                                                                 # If we just undid one rev, use an autosummary
1258                                                                 $firstrev = $oldrev->getNext();
1259                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1260                                                                         $userText = $undorev->getUserText();
1261                                                                         if ( $userText === '' ) {
1262                                                                                 $undoSummary = $this->context->msg(
1263                                                                                         'undo-summary-username-hidden',
1264                                                                                         $undo
1265                                                                                 )->inContentLanguage()->text();
1266                                                                         } else {
1267                                                                                 $undoSummary = $this->context->msg(
1268                                                                                         'undo-summary',
1269                                                                                         $undo,
1270                                                                                         $userText
1271                                                                                 )->inContentLanguage()->text();
1272                                                                         }
1273                                                                         if ( $this->summary === '' ) {
1274                                                                                 $this->summary = $undoSummary;
1275                                                                         } else {
1276                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1277                                                                                         ->inContentLanguage()->text() . $this->summary;
1278                                                                         }
1279                                                                         $this->undidRev = $undo;
1280                                                                 }
1281                                                                 $this->formtype = 'diff';
1282                                                         }
1283                                                 }
1284                                         } else {
1285                                                 // Failed basic sanity checks.
1286                                                 // Older revisions may have been removed since the link
1287                                                 // was created, or we may simply have got bogus input.
1288                                                 $undoMsg = 'norev';
1289                                         }
1290
1291                                         $out = $this->context->getOutput();
1292                                         // Messages: undo-success, undo-failure, undo-main-slot-only, undo-norev,
1293                                         // undo-nochange.
1294                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1295                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1296                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1297                                 }
1298
1299                                 if ( $content === false ) {
1300                                         $content = $this->getOriginalContent( $user );
1301                                 }
1302                         }
1303                 }
1304
1305                 return $content;
1306         }
1307
1308         /**
1309          * Get the content of the wanted revision, without section extraction.
1310          *
1311          * The result of this function can be used to compare user's input with
1312          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1313          * to the original text of the edit.
1314          *
1315          * This differs from Article::getContent() that when a missing revision is
1316          * encountered the result will be null and not the
1317          * 'missing-revision' message.
1318          *
1319          * @since 1.19
1320          * @param User $user The user to get the revision for
1321          * @return Content|null
1322          */
1323         private function getOriginalContent( User $user ) {
1324                 if ( $this->section == 'new' ) {
1325                         return $this->getCurrentContent();
1326                 }
1327                 $revision = $this->mArticle->getRevisionFetched();
1328                 if ( $revision === null ) {
1329                         $handler = ContentHandler::getForModelID( $this->contentModel );
1330                         return $handler->makeEmptyContent();
1331                 }
1332                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1333                 return $content;
1334         }
1335
1336         /**
1337          * Get the edit's parent revision ID
1338          *
1339          * The "parent" revision is the ancestor that should be recorded in this
1340          * page's revision history.  It is either the revision ID of the in-memory
1341          * article content, or in the case of a 3-way merge in order to rebase
1342          * across a recoverable edit conflict, the ID of the newer revision to
1343          * which we have rebased this page.
1344          *
1345          * @since 1.27
1346          * @return int Revision ID
1347          */
1348         public function getParentRevId() {
1349                 if ( $this->parentRevId ) {
1350                         return $this->parentRevId;
1351                 } else {
1352                         return $this->mArticle->getRevIdFetched();
1353                 }
1354         }
1355
1356         /**
1357          * Get the current content of the page. This is basically similar to
1358          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1359          * content object is returned instead of null.
1360          *
1361          * @since 1.21
1362          * @return Content
1363          */
1364         protected function getCurrentContent() {
1365                 $rev = $this->page->getRevision();
1366                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1367
1368                 if ( $content === false || $content === null ) {
1369                         $handler = ContentHandler::getForModelID( $this->contentModel );
1370                         return $handler->makeEmptyContent();
1371                 } elseif ( !$this->undidRev ) {
1372                         // Content models should always be the same since we error
1373                         // out if they are different before this point (in ->edit()).
1374                         // The exception being, during an undo, the current revision might
1375                         // differ from the prior revision.
1376                         $logger = LoggerFactory::getInstance( 'editpage' );
1377                         if ( $this->contentModel !== $rev->getContentModel() ) {
1378                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1379                                         'prev' => $this->contentModel,
1380                                         'new' => $rev->getContentModel(),
1381                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1382                                         'method' => __METHOD__
1383                                 ] );
1384                                 $this->contentModel = $rev->getContentModel();
1385                         }
1386
1387                         // Given that the content models should match, the current selected
1388                         // format should be supported.
1389                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1390                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1391
1392                                         'prev' => $this->contentFormat,
1393                                         'new' => $rev->getContentFormat(),
1394                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1395                                         'method' => __METHOD__
1396                                 ] );
1397                                 $this->contentFormat = $rev->getContentFormat();
1398                         }
1399                 }
1400                 return $content;
1401         }
1402
1403         /**
1404          * Use this method before edit() to preload some content into the edit box
1405          *
1406          * @param Content $content
1407          *
1408          * @since 1.21
1409          */
1410         public function setPreloadedContent( Content $content ) {
1411                 $this->mPreloadContent = $content;
1412         }
1413
1414         /**
1415          * Get the contents to be preloaded into the box, either set by
1416          * an earlier setPreloadText() or by loading the given page.
1417          *
1418          * @param string $preload Representing the title to preload from.
1419          * @param array $params Parameters to use (interface-message style) in the preloaded text
1420          *
1421          * @return Content
1422          *
1423          * @since 1.21
1424          */
1425         protected function getPreloadedContent( $preload, $params = [] ) {
1426                 if ( !empty( $this->mPreloadContent ) ) {
1427                         return $this->mPreloadContent;
1428                 }
1429
1430                 $handler = ContentHandler::getForModelID( $this->contentModel );
1431
1432                 if ( $preload === '' ) {
1433                         return $handler->makeEmptyContent();
1434                 }
1435
1436                 $user = $this->context->getUser();
1437                 $title = Title::newFromText( $preload );
1438                 # Check for existence to avoid getting MediaWiki:Noarticletext
1439                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1440                         // TODO: somehow show a warning to the user!
1441                         return $handler->makeEmptyContent();
1442                 }
1443
1444                 $page = WikiPage::factory( $title );
1445                 if ( $page->isRedirect() ) {
1446                         $title = $page->getRedirectTarget();
1447                         # Same as before
1448                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $user ) ) {
1449                                 // TODO: somehow show a warning to the user!
1450                                 return $handler->makeEmptyContent();
1451                         }
1452                         $page = WikiPage::factory( $title );
1453                 }
1454
1455                 $parserOptions = ParserOptions::newFromUser( $user );
1456                 $content = $page->getContent( Revision::RAW );
1457
1458                 if ( !$content ) {
1459                         // TODO: somehow show a warning to the user!
1460                         return $handler->makeEmptyContent();
1461                 }
1462
1463                 if ( $content->getModel() !== $handler->getModelID() ) {
1464                         $converted = $content->convert( $handler->getModelID() );
1465
1466                         if ( !$converted ) {
1467                                 // TODO: somehow show a warning to the user!
1468                                 wfDebug( "Attempt to preload incompatible content: " .
1469                                         "can't convert " . $content->getModel() .
1470                                         " to " . $handler->getModelID() );
1471
1472                                 return $handler->makeEmptyContent();
1473                         }
1474
1475                         $content = $converted;
1476                 }
1477
1478                 return $content->preloadTransform( $title, $parserOptions, $params );
1479         }
1480
1481         /**
1482          * Make sure the form isn't faking a user's credentials.
1483          *
1484          * @param WebRequest &$request
1485          * @return bool
1486          * @private
1487          */
1488         public function tokenOk( &$request ) {
1489                 $token = $request->getVal( 'wpEditToken' );
1490                 $user = $this->context->getUser();
1491                 $this->mTokenOk = $user->matchEditToken( $token );
1492                 $this->mTokenOkExceptSuffix = $user->matchEditTokenNoSuffix( $token );
1493                 return $this->mTokenOk;
1494         }
1495
1496         /**
1497          * Sets post-edit cookie indicating the user just saved a particular revision.
1498          *
1499          * This uses a temporary cookie for each revision ID so separate saves will never
1500          * interfere with each other.
1501          *
1502          * Article::view deletes the cookie on server-side after the redirect and
1503          * converts the value to the global JavaScript variable wgPostEdit.
1504          *
1505          * If the variable were set on the server, it would be cached, which is unwanted
1506          * since the post-edit state should only apply to the load right after the save.
1507          *
1508          * @param int $statusValue The status value (to check for new article status)
1509          */
1510         protected function setPostEditCookie( $statusValue ) {
1511                 $revisionId = $this->page->getLatest();
1512                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1513
1514                 $val = 'saved';
1515                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1516                         $val = 'created';
1517                 } elseif ( $this->oldid ) {
1518                         $val = 'restored';
1519                 }
1520
1521                 $response = $this->context->getRequest()->response();
1522                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1523         }
1524
1525         /**
1526          * Attempt submission
1527          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1528          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1529          * @return Status The resulting status object.
1530          */
1531         public function attemptSave( &$resultDetails = false ) {
1532                 // TODO: MCR: treat $this->minoredit like $this->bot and check isAllowed( 'minoredit' )!
1533                 // Also, add $this->autopatrol like $this->bot and check isAllowed( 'autopatrol' )!
1534                 // This is needed since PageUpdater no longer checks these rights!
1535
1536                 // Allow bots to exempt some edits from bot flagging
1537                 $bot = $this->context->getUser()->isAllowed( 'bot' ) && $this->bot;
1538                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1539
1540                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1541
1542                 return $status;
1543         }
1544
1545         /**
1546          * Log when a page was successfully saved after the edit conflict view
1547          */
1548         private function incrementResolvedConflicts() {
1549                 if ( $this->context->getRequest()->getText( 'mode' ) !== 'conflict' ) {
1550                         return;
1551                 }
1552
1553                 $this->getEditConflictHelper()->incrementResolvedStats();
1554         }
1555
1556         /**
1557          * Handle status, such as after attempt save
1558          *
1559          * @param Status $status
1560          * @param array|bool $resultDetails
1561          *
1562          * @throws ErrorPageError
1563          * @return bool False, if output is done, true if rest of the form should be displayed
1564          */
1565         private function handleStatus( Status $status, $resultDetails ) {
1566                 /**
1567                  * @todo FIXME: once the interface for internalAttemptSave() is made
1568                  *   nicer, this should use the message in $status
1569                  */
1570                 if ( $status->value == self::AS_SUCCESS_UPDATE
1571                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1572                 ) {
1573                         $this->incrementResolvedConflicts();
1574
1575                         $this->didSave = true;
1576                         if ( !$resultDetails['nullEdit'] ) {
1577                                 $this->setPostEditCookie( $status->value );
1578                         }
1579                 }
1580
1581                 $out = $this->context->getOutput();
1582
1583                 // "wpExtraQueryRedirect" is a hidden input to modify
1584                 // after save URL and is not used by actual edit form
1585                 $request = $this->context->getRequest();
1586                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1587
1588                 switch ( $status->value ) {
1589                         case self::AS_HOOK_ERROR_EXPECTED:
1590                         case self::AS_CONTENT_TOO_BIG:
1591                         case self::AS_ARTICLE_WAS_DELETED:
1592                         case self::AS_CONFLICT_DETECTED:
1593                         case self::AS_SUMMARY_NEEDED:
1594                         case self::AS_TEXTBOX_EMPTY:
1595                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1596                         case self::AS_END:
1597                         case self::AS_BLANK_ARTICLE:
1598                         case self::AS_SELF_REDIRECT:
1599                                 return true;
1600
1601                         case self::AS_HOOK_ERROR:
1602                                 return false;
1603
1604                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1605                         case self::AS_PARSE_ERROR:
1606                         case self::AS_UNICODE_NOT_SUPPORTED:
1607                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1608                                 return true;
1609
1610                         case self::AS_SUCCESS_NEW_ARTICLE:
1611                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1612                                 if ( $extraQueryRedirect ) {
1613                                         if ( $query === '' ) {
1614                                                 $query = $extraQueryRedirect;
1615                                         } else {
1616                                                 $query = $query . '&' . $extraQueryRedirect;
1617                                         }
1618                                 }
1619                                 $anchor = $resultDetails['sectionanchor'] ?? '';
1620                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1621                                 return false;
1622
1623                         case self::AS_SUCCESS_UPDATE:
1624                                 $extraQuery = '';
1625                                 $sectionanchor = $resultDetails['sectionanchor'];
1626
1627                                 // Give extensions a chance to modify URL query on update
1628                                 Hooks::run(
1629                                         'ArticleUpdateBeforeRedirect',
1630                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1631                                 );
1632
1633                                 if ( $resultDetails['redirect'] ) {
1634                                         if ( $extraQuery == '' ) {
1635                                                 $extraQuery = 'redirect=no';
1636                                         } else {
1637                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1638                                         }
1639                                 }
1640                                 if ( $extraQueryRedirect ) {
1641                                         if ( $extraQuery === '' ) {
1642                                                 $extraQuery = $extraQueryRedirect;
1643                                         } else {
1644                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1645                                         }
1646                                 }
1647
1648                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1649                                 return false;
1650
1651                         case self::AS_SPAM_ERROR:
1652                                 $this->spamPageWithContent( $resultDetails['spam'] );
1653                                 return false;
1654
1655                         case self::AS_BLOCKED_PAGE_FOR_USER:
1656                                 throw new UserBlockedError( $this->context->getUser()->getBlock() );
1657
1658                         case self::AS_IMAGE_REDIRECT_ANON:
1659                         case self::AS_IMAGE_REDIRECT_LOGGED:
1660                                 throw new PermissionsError( 'upload' );
1661
1662                         case self::AS_READ_ONLY_PAGE_ANON:
1663                         case self::AS_READ_ONLY_PAGE_LOGGED:
1664                                 throw new PermissionsError( 'edit' );
1665
1666                         case self::AS_READ_ONLY_PAGE:
1667                                 throw new ReadOnlyError;
1668
1669                         case self::AS_RATE_LIMITED:
1670                                 throw new ThrottledError();
1671
1672                         case self::AS_NO_CREATE_PERMISSION:
1673                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1674                                 throw new PermissionsError( $permission );
1675
1676                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1677                                 throw new PermissionsError( 'editcontentmodel' );
1678
1679                         default:
1680                                 // We don't recognize $status->value. The only way that can happen
1681                                 // is if an extension hook aborted from inside ArticleSave.
1682                                 // Render the status object into $this->hookError
1683                                 // FIXME this sucks, we should just use the Status object throughout
1684                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1685                                         '</div>';
1686                                 return true;
1687                 }
1688         }
1689
1690         /**
1691          * Run hooks that can filter edits just before they get saved.
1692          *
1693          * @param Content $content The Content to filter.
1694          * @param Status $status For reporting the outcome to the caller
1695          * @param User $user The user performing the edit
1696          *
1697          * @return bool
1698          */
1699         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1700                 // Run old style post-section-merge edit filter
1701                 if ( $this->hookError != '' ) {
1702                         # ...or the hook could be expecting us to produce an error
1703                         $status->fatal( 'hookaborted' );
1704                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1705                         return false;
1706                 }
1707
1708                 // Run new style post-section-merge edit filter
1709                 if ( !Hooks::run( 'EditFilterMergedContent',
1710                                 [ $this->context, $content, $status, $this->summary,
1711                                 $user, $this->minoredit ] )
1712                 ) {
1713                         # Error messages etc. could be handled within the hook...
1714                         if ( $status->isGood() ) {
1715                                 $status->fatal( 'hookaborted' );
1716                                 // Not setting $this->hookError here is a hack to allow the hook
1717                                 // to cause a return to the edit page without $this->hookError
1718                                 // being set. This is used by ConfirmEdit to display a captcha
1719                                 // without any error message cruft.
1720                         } else {
1721                                 $this->hookError = $this->formatStatusErrors( $status );
1722                         }
1723                         // Use the existing $status->value if the hook set it
1724                         if ( !$status->value ) {
1725                                 $status->value = self::AS_HOOK_ERROR;
1726                         }
1727                         return false;
1728                 } elseif ( !$status->isOK() ) {
1729                         # ...or the hook could be expecting us to produce an error
1730                         // FIXME this sucks, we should just use the Status object throughout
1731                         $this->hookError = $this->formatStatusErrors( $status );
1732                         $status->fatal( 'hookaborted' );
1733                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1734                         return false;
1735                 }
1736
1737                 return true;
1738         }
1739
1740         /**
1741          * Wrap status errors in an errorbox for increased visibility
1742          *
1743          * @param Status $status
1744          * @return string Wikitext
1745          */
1746         private function formatStatusErrors( Status $status ) {
1747                 $errmsg = $status->getWikiText(
1748                         'edit-error-short',
1749                         'edit-error-long',
1750                         $this->context->getLanguage()
1751                 );
1752                 return <<<ERROR
1753 <div class="errorbox">
1754 {$errmsg}
1755 </div>
1756 <br clear="all" />
1757 ERROR;
1758         }
1759
1760         /**
1761          * Return the summary to be used for a new section.
1762          *
1763          * @param string $sectionanchor Set to the section anchor text
1764          * @return string
1765          */
1766         private function newSectionSummary( &$sectionanchor = null ) {
1767                 global $wgParser;
1768
1769                 if ( $this->sectiontitle !== '' ) {
1770                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1771                         // If no edit summary was specified, create one automatically from the section
1772                         // title and have it link to the new section. Otherwise, respect the summary as
1773                         // passed.
1774                         if ( $this->summary === '' ) {
1775                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1776                                 return $this->context->msg( 'newsectionsummary' )
1777                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1778                         }
1779                 } elseif ( $this->summary !== '' ) {
1780                         $sectionanchor = $this->guessSectionName( $this->summary );
1781                         # This is a new section, so create a link to the new section
1782                         # in the revision summary.
1783                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1784                         return $this->context->msg( 'newsectionsummary' )
1785                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1786                 }
1787                 return $this->summary;
1788         }
1789
1790         /**
1791          * Attempt submission (no UI)
1792          *
1793          * @param array &$result Array to add statuses to, currently with the
1794          *   possible keys:
1795          *   - spam (string): Spam string from content if any spam is detected by
1796          *     matchSpamRegex.
1797          *   - sectionanchor (string): Section anchor for a section save.
1798          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1799          *     false otherwise.
1800          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1801          *     revision is a redirect.
1802          * @param bool $bot True if edit is being made under the bot right.
1803          *
1804          * @return Status Status object, possibly with a message, but always with
1805          *   one of the AS_* constants in $status->value,
1806          *
1807          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1808          *   various error display idiosyncrasies. There are also lots of cases
1809          *   where error metadata is set in the object and retrieved later instead
1810          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1811          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1812          * time.
1813          */
1814         public function internalAttemptSave( &$result, $bot = false ) {
1815                 $status = Status::newGood();
1816                 $user = $this->context->getUser();
1817
1818                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1819                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1820                         $status->fatal( 'hookaborted' );
1821                         $status->value = self::AS_HOOK_ERROR;
1822                         return $status;
1823                 }
1824
1825                 if ( $this->unicodeCheck !== self::UNICODE_CHECK ) {
1826                         $status->fatal( 'unicode-support-fail' );
1827                         $status->value = self::AS_UNICODE_NOT_SUPPORTED;
1828                         return $status;
1829                 }
1830
1831                 $request = $this->context->getRequest();
1832                 $spam = $request->getText( 'wpAntispam' );
1833                 if ( $spam !== '' ) {
1834                         wfDebugLog(
1835                                 'SimpleAntiSpam',
1836                                 $user->getName() .
1837                                 ' editing "' .
1838                                 $this->mTitle->getPrefixedText() .
1839                                 '" submitted bogus field "' .
1840                                 $spam .
1841                                 '"'
1842                         );
1843                         $status->fatal( 'spamprotectionmatch', false );
1844                         $status->value = self::AS_SPAM_ERROR;
1845                         return $status;
1846                 }
1847
1848                 try {
1849                         # Construct Content object
1850                         $textbox_content = $this->toEditContent( $this->textbox1 );
1851                 } catch ( MWContentSerializationException $ex ) {
1852                         $status->fatal(
1853                                 'content-failed-to-parse',
1854                                 $this->contentModel,
1855                                 $this->contentFormat,
1856                                 $ex->getMessage()
1857                         );
1858                         $status->value = self::AS_PARSE_ERROR;
1859                         return $status;
1860                 }
1861
1862                 # Check image redirect
1863                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1864                         $textbox_content->isRedirect() &&
1865                         !$user->isAllowed( 'upload' )
1866                 ) {
1867                                 $code = $user->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1868                                 $status->setResult( false, $code );
1869
1870                                 return $status;
1871                 }
1872
1873                 # Check for spam
1874                 $match = self::matchSummarySpamRegex( $this->summary );
1875                 if ( $match === false && $this->section == 'new' ) {
1876                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1877                         # regular summaries, it is added to the actual wikitext.
1878                         if ( $this->sectiontitle !== '' ) {
1879                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1880                                 $match = self::matchSpamRegex( $this->sectiontitle );
1881                         } else {
1882                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1883                                 # is used with the 'summary' parameter.
1884                                 $match = self::matchSpamRegex( $this->summary );
1885                         }
1886                 }
1887                 if ( $match === false ) {
1888                         $match = self::matchSpamRegex( $this->textbox1 );
1889                 }
1890                 if ( $match !== false ) {
1891                         $result['spam'] = $match;
1892                         $ip = $request->getIP();
1893                         $pdbk = $this->mTitle->getPrefixedDBkey();
1894                         $match = str_replace( "\n", '', $match );
1895                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1896                         $status->fatal( 'spamprotectionmatch', $match );
1897                         $status->value = self::AS_SPAM_ERROR;
1898                         return $status;
1899                 }
1900                 if ( !Hooks::run(
1901                         'EditFilter',
1902                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1903                 ) {
1904                         # Error messages etc. could be handled within the hook...
1905                         $status->fatal( 'hookaborted' );
1906                         $status->value = self::AS_HOOK_ERROR;
1907                         return $status;
1908                 } elseif ( $this->hookError != '' ) {
1909                         # ...or the hook could be expecting us to produce an error
1910                         $status->fatal( 'hookaborted' );
1911                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1912                         return $status;
1913                 }
1914
1915                 if ( $user->isBlockedFrom( $this->mTitle, false ) ) {
1916                         // Auto-block user's IP if the account was "hard" blocked
1917                         if ( !wfReadOnly() ) {
1918                                 $user->spreadAnyEditBlock();
1919                         }
1920                         # Check block state against master, thus 'false'.
1921                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1922                         return $status;
1923                 }
1924
1925                 $this->contentLength = strlen( $this->textbox1 );
1926                 $config = $this->context->getConfig();
1927                 $maxArticleSize = $config->get( 'MaxArticleSize' );
1928                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
1929                         // Error will be displayed by showEditForm()
1930                         $this->tooBig = true;
1931                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1932                         return $status;
1933                 }
1934
1935                 if ( !$user->isAllowed( 'edit' ) ) {
1936                         if ( $user->isAnon() ) {
1937                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1938                                 return $status;
1939                         } else {
1940                                 $status->fatal( 'readonlytext' );
1941                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1942                                 return $status;
1943                         }
1944                 }
1945
1946                 $changingContentModel = false;
1947                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1948                         if ( !$config->get( 'ContentHandlerUseDB' ) ) {
1949                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1950                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1951                                 return $status;
1952                         } elseif ( !$user->isAllowed( 'editcontentmodel' ) ) {
1953                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1954                                 return $status;
1955                         }
1956                         // Make sure the user can edit the page under the new content model too
1957                         $titleWithNewContentModel = clone $this->mTitle;
1958                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1959                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $user )
1960                                 || !$titleWithNewContentModel->userCan( 'edit', $user )
1961                         ) {
1962                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1963                                 return $status;
1964                         }
1965
1966                         $changingContentModel = true;
1967                         $oldContentModel = $this->mTitle->getContentModel();
1968                 }
1969
1970                 if ( $this->changeTags ) {
1971                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1972                                 $this->changeTags, $user );
1973                         if ( !$changeTagsStatus->isOK() ) {
1974                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1975                                 return $changeTagsStatus;
1976                         }
1977                 }
1978
1979                 if ( wfReadOnly() ) {
1980                         $status->fatal( 'readonlytext' );
1981                         $status->value = self::AS_READ_ONLY_PAGE;
1982                         return $status;
1983                 }
1984                 if ( $user->pingLimiter() || $user->pingLimiter( 'linkpurge', 0 )
1985                         || ( $changingContentModel && $user->pingLimiter( 'editcontentmodel' ) )
1986                 ) {
1987                         $status->fatal( 'actionthrottledtext' );
1988                         $status->value = self::AS_RATE_LIMITED;
1989                         return $status;
1990                 }
1991
1992                 # If the article has been deleted while editing, don't save it without
1993                 # confirmation
1994                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1995                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1996                         return $status;
1997                 }
1998
1999                 # Load the page data from the master. If anything changes in the meantime,
2000                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
2001                 $this->page->loadPageData( 'fromdbmaster' );
2002                 $new = !$this->page->exists();
2003
2004                 if ( $new ) {
2005                         // Late check for create permission, just in case *PARANOIA*
2006                         if ( !$this->mTitle->userCan( 'create', $user ) ) {
2007                                 $status->fatal( 'nocreatetext' );
2008                                 $status->value = self::AS_NO_CREATE_PERMISSION;
2009                                 wfDebug( __METHOD__ . ": no create permission\n" );
2010                                 return $status;
2011                         }
2012
2013                         // Don't save a new page if it's blank or if it's a MediaWiki:
2014                         // message with content equivalent to default (allow empty pages
2015                         // in this case to disable messages, see T52124)
2016                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
2017                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
2018                                 $defaultText = $defaultMessageText;
2019                         } else {
2020                                 $defaultText = '';
2021                         }
2022
2023                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
2024                                 $this->blankArticle = true;
2025                                 $status->fatal( 'blankarticle' );
2026                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
2027                                 return $status;
2028                         }
2029
2030                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $user ) ) {
2031                                 return $status;
2032                         }
2033
2034                         $content = $textbox_content;
2035
2036                         $result['sectionanchor'] = '';
2037                         if ( $this->section == 'new' ) {
2038                                 if ( $this->sectiontitle !== '' ) {
2039                                         // Insert the section title above the content.
2040                                         $content = $content->addSectionHeader( $this->sectiontitle );
2041                                 } elseif ( $this->summary !== '' ) {
2042                                         // Insert the section title above the content.
2043                                         $content = $content->addSectionHeader( $this->summary );
2044                                 }
2045                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
2046                         }
2047
2048                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
2049
2050                 } else { # not $new
2051
2052                         # Article exists. Check for edit conflict.
2053
2054                         $this->page->clear(); # Force reload of dates, etc.
2055                         $timestamp = $this->page->getTimestamp();
2056                         $latest = $this->page->getLatest();
2057
2058                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
2059
2060                         // An edit conflict is detected if the current revision is different from the
2061                         // revision that was current when editing was initiated on the client.
2062                         // This is checked based on the timestamp and revision ID.
2063                         // TODO: the timestamp based check can probably go away now.
2064                         if ( $timestamp != $this->edittime
2065                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
2066                         ) {
2067                                 $this->isConflict = true;
2068                                 if ( $this->section == 'new' ) {
2069                                         if ( $this->page->getUserText() == $user->getName() &&
2070                                                 $this->page->getComment() == $this->newSectionSummary()
2071                                         ) {
2072                                                 // Probably a duplicate submission of a new comment.
2073                                                 // This can happen when CDN resends a request after
2074                                                 // a timeout but the first one actually went through.
2075                                                 wfDebug( __METHOD__
2076                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
2077                                         } else {
2078                                                 // New comment; suppress conflict.
2079                                                 $this->isConflict = false;
2080                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
2081                                         }
2082                                 } elseif ( $this->section == ''
2083                                         && Revision::userWasLastToEdit(
2084                                                 DB_MASTER, $this->mTitle->getArticleID(),
2085                                                 $user->getId(), $this->edittime
2086                                         )
2087                                 ) {
2088                                         # Suppress edit conflict with self, except for section edits where merging is required.
2089                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2090                                         $this->isConflict = false;
2091                                 }
2092                         }
2093
2094                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2095                         if ( $this->sectiontitle !== '' ) {
2096                                 $sectionTitle = $this->sectiontitle;
2097                         } else {
2098                                 $sectionTitle = $this->summary;
2099                         }
2100
2101                         $content = null;
2102
2103                         if ( $this->isConflict ) {
2104                                 wfDebug( __METHOD__
2105                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2106                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2107                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2108                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2109                                 if ( $this->editRevId !== null ) {
2110                                         $content = $this->page->replaceSectionAtRev(
2111                                                 $this->section,
2112                                                 $textbox_content,
2113                                                 $sectionTitle,
2114                                                 $this->editRevId
2115                                         );
2116                                 } else {
2117                                         $content = $this->page->replaceSectionContent(
2118                                                 $this->section,
2119                                                 $textbox_content,
2120                                                 $sectionTitle,
2121                                                 $this->edittime
2122                                         );
2123                                 }
2124                         } else {
2125                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2126                                 $content = $this->page->replaceSectionContent(
2127                                         $this->section,
2128                                         $textbox_content,
2129                                         $sectionTitle
2130                                 );
2131                         }
2132
2133                         if ( is_null( $content ) ) {
2134                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2135                                 $this->isConflict = true;
2136                                 $content = $textbox_content; // do not try to merge here!
2137                         } elseif ( $this->isConflict ) {
2138                                 # Attempt merge
2139                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2140                                         // Successful merge! Maybe we should tell the user the good news?
2141                                         $this->isConflict = false;
2142                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2143                                 } else {
2144                                         $this->section = '';
2145                                         $this->textbox1 = ContentHandler::getContentText( $content );
2146                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2147                                 }
2148                         }
2149
2150                         if ( $this->isConflict ) {
2151                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2152                                 return $status;
2153                         }
2154
2155                         if ( !$this->runPostMergeFilters( $content, $status, $user ) ) {
2156                                 return $status;
2157                         }
2158
2159                         if ( $this->section == 'new' ) {
2160                                 // Handle the user preference to force summaries here
2161                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2162                                         $this->missingSummary = true;
2163                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2164                                         $status->value = self::AS_SUMMARY_NEEDED;
2165                                         return $status;
2166                                 }
2167
2168                                 // Do not allow the user to post an empty comment
2169                                 if ( $this->textbox1 == '' ) {
2170                                         $this->missingComment = true;
2171                                         $status->fatal( 'missingcommenttext' );
2172                                         $status->value = self::AS_TEXTBOX_EMPTY;
2173                                         return $status;
2174                                 }
2175                         } elseif ( !$this->allowBlankSummary
2176                                 && !$content->equals( $this->getOriginalContent( $user ) )
2177                                 && !$content->isRedirect()
2178                                 && md5( $this->summary ) == $this->autoSumm
2179                         ) {
2180                                 $this->missingSummary = true;
2181                                 $status->fatal( 'missingsummary' );
2182                                 $status->value = self::AS_SUMMARY_NEEDED;
2183                                 return $status;
2184                         }
2185
2186                         # All's well
2187                         $sectionanchor = '';
2188                         if ( $this->section == 'new' ) {
2189                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2190                         } elseif ( $this->section != '' ) {
2191                                 # Try to get a section anchor from the section source, redirect
2192                                 # to edited section if header found.
2193                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2194                                 # for duplicate heading checking and maybe parsing.
2195                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2196                                 # We can't deal with anchors, includes, html etc in the header for now,
2197                                 # headline would need to be parsed to improve this.
2198                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2199                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2200                                 }
2201                         }
2202                         $result['sectionanchor'] = $sectionanchor;
2203
2204                         // Save errors may fall down to the edit form, but we've now
2205                         // merged the section into full text. Clear the section field
2206                         // so that later submission of conflict forms won't try to
2207                         // replace that into a duplicated mess.
2208                         $this->textbox1 = $this->toEditText( $content );
2209                         $this->section = '';
2210
2211                         $status->value = self::AS_SUCCESS_UPDATE;
2212                 }
2213
2214                 if ( !$this->allowSelfRedirect
2215                         && $content->isRedirect()
2216                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2217                 ) {
2218                         // If the page already redirects to itself, don't warn.
2219                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2220                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2221                                 $this->selfRedirect = true;
2222                                 $status->fatal( 'selfredirect' );
2223                                 $status->value = self::AS_SELF_REDIRECT;
2224                                 return $status;
2225                         }
2226                 }
2227
2228                 // Check for length errors again now that the section is merged in
2229                 $this->contentLength = strlen( $this->toEditText( $content ) );
2230                 if ( $this->contentLength > $maxArticleSize * 1024 ) {
2231                         $this->tooBig = true;
2232                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2233                         return $status;
2234                 }
2235
2236                 $flags = EDIT_AUTOSUMMARY |
2237                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2238                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2239                         ( $bot ? EDIT_FORCE_BOT : 0 );
2240
2241                 $doEditStatus = $this->page->doEditContent(
2242                         $content,
2243                         $this->summary,
2244                         $flags,
2245                         false,
2246                         $user,
2247                         $content->getDefaultFormat(),
2248                         $this->changeTags,
2249                         $this->undidRev
2250                 );
2251
2252                 if ( !$doEditStatus->isOK() ) {
2253                         // Failure from doEdit()
2254                         // Show the edit conflict page for certain recognized errors from doEdit(),
2255                         // but don't show it for errors from extension hooks
2256                         $errors = $doEditStatus->getErrorsArray();
2257                         if ( in_array( $errors[0][0],
2258                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2259                         ) {
2260                                 $this->isConflict = true;
2261                                 // Destroys data doEdit() put in $status->value but who cares
2262                                 $doEditStatus->value = self::AS_END;
2263                         }
2264                         return $doEditStatus;
2265                 }
2266
2267                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2268                 if ( $result['nullEdit'] ) {
2269                         // We don't know if it was a null edit until now, so increment here
2270                         $user->pingLimiter( 'linkpurge' );
2271                 }
2272                 $result['redirect'] = $content->isRedirect();
2273
2274                 $this->updateWatchlist();
2275
2276                 // If the content model changed, add a log entry
2277                 if ( $changingContentModel ) {
2278                         $this->addContentModelChangeLogEntry(
2279                                 $user,
2280                                 $new ? false : $oldContentModel,
2281                                 $this->contentModel,
2282                                 $this->summary
2283                         );
2284                 }
2285
2286                 return $status;
2287         }
2288
2289         /**
2290          * @param User $user
2291          * @param string|false $oldModel false if the page is being newly created
2292          * @param string $newModel
2293          * @param string $reason
2294          */
2295         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2296                 $new = $oldModel === false;
2297                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2298                 $log->setPerformer( $user );
2299                 $log->setTarget( $this->mTitle );
2300                 $log->setComment( $reason );
2301                 $log->setParameters( [
2302                         '4::oldmodel' => $oldModel,
2303                         '5::newmodel' => $newModel
2304                 ] );
2305                 $logid = $log->insert();
2306                 $log->publish( $logid );
2307         }
2308
2309         /**
2310          * Register the change of watch status
2311          */
2312         protected function updateWatchlist() {
2313                 $user = $this->context->getUser();
2314                 if ( !$user->isLoggedIn() ) {
2315                         return;
2316                 }
2317
2318                 $title = $this->mTitle;
2319                 $watch = $this->watchthis;
2320                 // Do this in its own transaction to reduce contention...
2321                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2322                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2323                                 return; // nothing to change
2324                         }
2325                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2326                 } );
2327         }
2328
2329         /**
2330          * Attempts to do 3-way merge of edit content with a base revision
2331          * and current content, in case of edit conflict, in whichever way appropriate
2332          * for the content type.
2333          *
2334          * @since 1.21
2335          *
2336          * @param Content $editContent
2337          *
2338          * @return bool
2339          */
2340         private function mergeChangesIntoContent( &$editContent ) {
2341                 $db = wfGetDB( DB_MASTER );
2342
2343                 // This is the revision that was current at the time editing was initiated on the client,
2344                 // even if the edit was based on an old revision.
2345                 $baseRevision = $this->getBaseRevision();
2346                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2347
2348                 if ( is_null( $baseContent ) ) {
2349                         return false;
2350                 }
2351
2352                 // The current state, we want to merge updates into it
2353                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2354                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2355
2356                 if ( is_null( $currentContent ) ) {
2357                         return false;
2358                 }
2359
2360                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2361
2362                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2363
2364                 if ( $result ) {
2365                         $editContent = $result;
2366                         // Update parentRevId to what we just merged.
2367                         $this->parentRevId = $currentRevision->getId();
2368                         return true;
2369                 }
2370
2371                 return false;
2372         }
2373
2374         /**
2375          * Returns the revision that was current at the time editing was initiated on the client,
2376          * even if the edit was based on an old revision.
2377          *
2378          * @warning this method is very poorly named. If the user opened the form with ?oldid=X,
2379          *        one might think of X as the "base revision", which is NOT what this returns,
2380          *        see oldid for that. One might further assume that this corresponds to the $baseRevId
2381          *        parameter of WikiPage::doEditContent, which is not the case either.
2382          *        getExpectedParentRevision() would perhaps be a better name.
2383          *
2384          * @return Revision|null Current version when editing was initiated on the client
2385          */
2386         public function getBaseRevision() {
2387                 if ( !$this->mBaseRevision ) {
2388                         $db = wfGetDB( DB_MASTER );
2389                         $this->mBaseRevision = $this->editRevId
2390                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2391                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2392                 }
2393                 return $this->mBaseRevision;
2394         }
2395
2396         /**
2397          * Check given input text against $wgSpamRegex, and return the text of the first match.
2398          *
2399          * @param string $text
2400          *
2401          * @return string|bool Matching string or false
2402          */
2403         public static function matchSpamRegex( $text ) {
2404                 global $wgSpamRegex;
2405                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2406                 $regexes = (array)$wgSpamRegex;
2407                 return self::matchSpamRegexInternal( $text, $regexes );
2408         }
2409
2410         /**
2411          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2412          *
2413          * @param string $text
2414          *
2415          * @return string|bool Matching string or false
2416          */
2417         public static function matchSummarySpamRegex( $text ) {
2418                 global $wgSummarySpamRegex;
2419                 $regexes = (array)$wgSummarySpamRegex;
2420                 return self::matchSpamRegexInternal( $text, $regexes );
2421         }
2422
2423         /**
2424          * @param string $text
2425          * @param array $regexes
2426          * @return bool|string
2427          */
2428         protected static function matchSpamRegexInternal( $text, $regexes ) {
2429                 foreach ( $regexes as $regex ) {
2430                         $matches = [];
2431                         if ( preg_match( $regex, $text, $matches ) ) {
2432                                 return $matches[0];
2433                         }
2434                 }
2435                 return false;
2436         }
2437
2438         public function setHeaders() {
2439                 $out = $this->context->getOutput();
2440
2441                 $out->addModules( 'mediawiki.action.edit' );
2442                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2443                 $out->addModuleStyles( 'mediawiki.editfont.styles' );
2444
2445                 $user = $this->context->getUser();
2446                 if ( $user->getOption( 'showtoolbar' ) ) {
2447                         // The addition of default buttons is handled by getEditToolbar() which
2448                         // has its own dependency on this module. The call here ensures the module
2449                         // is loaded in time (it has position "top") for other modules to register
2450                         // buttons (e.g. extensions, gadgets, user scripts).
2451                         $out->addModules( 'mediawiki.toolbar' );
2452                 }
2453
2454                 if ( $user->getOption( 'uselivepreview' ) ) {
2455                         $out->addModules( 'mediawiki.action.edit.preview' );
2456                 }
2457
2458                 if ( $user->getOption( 'useeditwarning' ) ) {
2459                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2460                 }
2461
2462                 # Enabled article-related sidebar, toplinks, etc.
2463                 $out->setArticleRelated( true );
2464
2465                 $contextTitle = $this->getContextTitle();
2466                 if ( $this->isConflict ) {
2467                         $msg = 'editconflict';
2468                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2469                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2470                 } else {
2471                         $msg = $contextTitle->exists()
2472                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2473                                         && $contextTitle->getDefaultMessageText() !== false
2474                                 )
2475                                 ? 'editing'
2476                                 : 'creating';
2477                 }
2478
2479                 # Use the title defined by DISPLAYTITLE magic word when present
2480                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2481                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2482                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2483                 if ( $displayTitle === false ) {
2484                         $displayTitle = $contextTitle->getPrefixedText();
2485                 }
2486                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2487
2488                 $config = $this->context->getConfig();
2489
2490                 # Transmit the name of the message to JavaScript for live preview
2491                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2492                 $out->addJsConfigVars( [
2493                         'wgEditMessage' => $msg,
2494                         'wgAjaxEditStash' => $config->get( 'AjaxEditStash' ),
2495                 ] );
2496
2497                 // Add whether to use 'save' or 'publish' messages to JavaScript for post-edit, other
2498                 // editors, etc.
2499                 $out->addJsConfigVars(
2500                         'wgEditSubmitButtonLabelPublish',
2501                         $config->get( 'EditSubmitButtonLabelPublish' )
2502                 );
2503         }
2504
2505         /**
2506          * Show all applicable editing introductions
2507          */
2508         protected function showIntro() {
2509                 if ( $this->suppressIntro ) {
2510                         return;
2511                 }
2512
2513                 $out = $this->context->getOutput();
2514                 $namespace = $this->mTitle->getNamespace();
2515
2516                 if ( $namespace == NS_MEDIAWIKI ) {
2517                         # Show a warning if editing an interface message
2518                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2519                         # If this is a default message (but not css, json, or js),
2520                         # show a hint that it is translatable on translatewiki.net
2521                         if (
2522                                 !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2523                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JSON )
2524                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2525                         ) {
2526                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2527                                 if ( $defaultMessageText !== false ) {
2528                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2529                                                 'translateinterface' );
2530                                 }
2531                         }
2532                 } elseif ( $namespace == NS_FILE ) {
2533                         # Show a hint to shared repo
2534                         $file = wfFindFile( $this->mTitle );
2535                         if ( $file && !$file->isLocal() ) {
2536                                 $descUrl = $file->getDescriptionUrl();
2537                                 # there must be a description url to show a hint to shared repo
2538                                 if ( $descUrl ) {
2539                                         if ( !$this->mTitle->exists() ) {
2540                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2541                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2542                                                 ] );
2543                                         } else {
2544                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2545                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2546                                                 ] );
2547                                         }
2548                                 }
2549                         }
2550                 }
2551
2552                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2553                 # Show log extract when the user is currently blocked
2554                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2555                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2556                         $user = User::newFromName( $username, false /* allow IP users */ );
2557                         $ip = User::isIP( $username );
2558                         $block = Block::newFromTarget( $user, $user );
2559                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2560                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2561                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2562                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2563                                 # Show log extract if the user is currently blocked
2564                                 LogEventsList::showLogExtract(
2565                                         $out,
2566                                         'block',
2567                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2568                                         '',
2569                                         [
2570                                                 'lim' => 1,
2571                                                 'showIfEmpty' => false,
2572                                                 'msgKey' => [
2573                                                         'blocked-notice-logextract',
2574                                                         $user->getName() # Support GENDER in notice
2575                                                 ]
2576                                         ]
2577                                 );
2578                         }
2579                 }
2580                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2581                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2582                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2583                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2584                         ) );
2585                         if ( $this->context->getUser()->isLoggedIn() ) {
2586                                 $out->wrapWikiMsg(
2587                                         // Suppress the external link icon, consider the help url an internal one
2588                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2589                                         [
2590                                                 'newarticletext',
2591                                                 $helpLink
2592                                         ]
2593                                 );
2594                         } else {
2595                                 $out->wrapWikiMsg(
2596                                         // Suppress the external link icon, consider the help url an internal one
2597                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2598                                         [
2599                                                 'newarticletextanon',
2600                                                 $helpLink
2601                                         ]
2602                                 );
2603                         }
2604                 }
2605                 # Give a notice if the user is editing a deleted/moved page...
2606                 if ( !$this->mTitle->exists() ) {
2607                         $dbr = wfGetDB( DB_REPLICA );
2608
2609                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2610                                 '',
2611                                 [
2612                                         'lim' => 10,
2613                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2614                                         'showIfEmpty' => false,
2615                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2616                                 ]
2617                         );
2618                 }
2619         }
2620
2621         /**
2622          * Attempt to show a custom editing introduction, if supplied
2623          *
2624          * @return bool
2625          */
2626         protected function showCustomIntro() {
2627                 if ( $this->editintro ) {
2628                         $title = Title::newFromText( $this->editintro );
2629                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2630                                 // Added using template syntax, to take <noinclude>'s into account.
2631                                 $this->context->getOutput()->addWikiTextTitleTidy(
2632                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2633                                         $this->mTitle
2634                                 );
2635                                 return true;
2636                         }
2637                 }
2638                 return false;
2639         }
2640
2641         /**
2642          * Gets an editable textual representation of $content.
2643          * The textual representation can be turned by into a Content object by the
2644          * toEditContent() method.
2645          *
2646          * If $content is null or false or a string, $content is returned unchanged.
2647          *
2648          * If the given Content object is not of a type that can be edited using
2649          * the text base EditPage, an exception will be raised. Set
2650          * $this->allowNonTextContent to true to allow editing of non-textual
2651          * content.
2652          *
2653          * @param Content|null|bool|string $content
2654          * @return string The editable text form of the content.
2655          *
2656          * @throws MWException If $content is not an instance of TextContent and
2657          *   $this->allowNonTextContent is not true.
2658          */
2659         protected function toEditText( $content ) {
2660                 if ( $content === null || $content === false || is_string( $content ) ) {
2661                         return $content;
2662                 }
2663
2664                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2665                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2666                 }
2667
2668                 return $content->serialize( $this->contentFormat );
2669         }
2670
2671         /**
2672          * Turns the given text into a Content object by unserializing it.
2673          *
2674          * If the resulting Content object is not of a type that can be edited using
2675          * the text base EditPage, an exception will be raised. Set
2676          * $this->allowNonTextContent to true to allow editing of non-textual
2677          * content.
2678          *
2679          * @param string|null|bool $text Text to unserialize
2680          * @return Content|bool|null The content object created from $text. If $text was false
2681          *   or null, false resp. null will be  returned instead.
2682          *
2683          * @throws MWException If unserializing the text results in a Content
2684          *   object that is not an instance of TextContent and
2685          *   $this->allowNonTextContent is not true.
2686          */
2687         protected function toEditContent( $text ) {
2688                 if ( $text === false || $text === null ) {
2689                         return $text;
2690                 }
2691
2692                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2693                         $this->contentModel, $this->contentFormat );
2694
2695                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2696                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2697                 }
2698
2699                 return $content;
2700         }
2701
2702         /**
2703          * Send the edit form and related headers to OutputPage
2704          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2705          *     during form output near the top, for captchas and the like.
2706          *
2707          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2708          * use the EditPage::showEditForm:fields hook instead.
2709          */
2710         public function showEditForm( $formCallback = null ) {
2711                 # need to parse the preview early so that we know which templates are used,
2712                 # otherwise users with "show preview after edit box" will get a blank list
2713                 # we parse this near the beginning so that setHeaders can do the title
2714                 # setting work instead of leaving it in getPreviewText
2715                 $previewOutput = '';
2716                 if ( $this->formtype == 'preview' ) {
2717                         $previewOutput = $this->getPreviewText();
2718                 }
2719
2720                 $out = $this->context->getOutput();
2721
2722                 // Avoid PHP 7.1 warning of passing $this by reference
2723                 $editPage = $this;
2724                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2725
2726                 $this->setHeaders();
2727
2728                 $this->addTalkPageText();
2729                 $this->addEditNotices();
2730
2731                 if ( !$this->isConflict &&
2732                         $this->section != '' &&
2733                         !$this->isSectionEditSupported() ) {
2734                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2735                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2736                         // Someone is welcome to try refactoring though
2737                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2738                         return;
2739                 }
2740
2741                 $this->showHeader();
2742
2743                 $out->addHTML( $this->editFormPageTop );
2744
2745                 $user = $this->context->getUser();
2746                 if ( $user->getOption( 'previewontop' ) ) {
2747                         $this->displayPreviewArea( $previewOutput, true );
2748                 }
2749
2750                 $out->addHTML( $this->editFormTextTop );
2751
2752                 $showToolbar = true;
2753                 if ( $this->wasDeletedSinceLastEdit() ) {
2754                         if ( $this->formtype == 'save' ) {
2755                                 // Hide the toolbar and edit area, user can click preview to get it back
2756                                 // Add an confirmation checkbox and explanation.
2757                                 $showToolbar = false;
2758                         } else {
2759                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2760                                         'deletedwhileediting' );
2761                         }
2762                 }
2763
2764                 // @todo add EditForm plugin interface and use it here!
2765                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2766                 $out->addHTML( Html::openElement(
2767                         'form',
2768                         [
2769                                 'class' => 'mw-editform',
2770                                 'id' => self::EDITFORM_ID,
2771                                 'name' => self::EDITFORM_ID,
2772                                 'method' => 'post',
2773                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2774                                 'enctype' => 'multipart/form-data'
2775                         ]
2776                 ) );
2777
2778                 if ( is_callable( $formCallback ) ) {
2779                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2780                         call_user_func_array( $formCallback, [ &$out ] );
2781                 }
2782
2783                 // Add a check for Unicode support
2784                 $out->addHTML( Html::hidden( 'wpUnicodeCheck', self::UNICODE_CHECK ) );
2785
2786                 // Add an empty field to trip up spambots
2787                 $out->addHTML(
2788                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2789                         . Html::rawElement(
2790                                 'label',
2791                                 [ 'for' => 'wpAntispam' ],
2792                                 $this->context->msg( 'simpleantispam-label' )->parse()
2793                         )
2794                         . Xml::element(
2795                                 'input',
2796                                 [
2797                                         'type' => 'text',
2798                                         'name' => 'wpAntispam',
2799                                         'id' => 'wpAntispam',
2800                                         'value' => ''
2801                                 ]
2802                         )
2803                         . Xml::closeElement( 'div' )
2804                 );
2805
2806                 // Avoid PHP 7.1 warning of passing $this by reference
2807                 $editPage = $this;
2808                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2809
2810                 // Put these up at the top to ensure they aren't lost on early form submission
2811                 $this->showFormBeforeText();
2812
2813                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2814                         $username = $this->lastDelete->user_name;
2815                         $comment = CommentStore::getStore()
2816                                 ->getComment( 'log_comment', $this->lastDelete )->text;
2817
2818                         // It is better to not parse the comment at all than to have templates expanded in the middle
2819                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2820                         $key = $comment === ''
2821                                 ? 'confirmrecreate-noreason'
2822                                 : 'confirmrecreate';
2823                         $out->addHTML(
2824                                 '<div class="mw-confirm-recreate">' .
2825                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2826                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2827                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2828                                 ) .
2829                                 '</div>'
2830                         );
2831                 }
2832
2833                 # When the summary is hidden, also hide them on preview/show changes
2834                 if ( $this->nosummary ) {
2835                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2836                 }
2837
2838                 # If a blank edit summary was previously provided, and the appropriate
2839                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2840                 # user being bounced back more than once in the event that a summary
2841                 # is not required.
2842                 # ####
2843                 # For a bit more sophisticated detection of blank summaries, hash the
2844                 # automatic one and pass that in the hidden field wpAutoSummary.
2845                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2846                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2847                 }
2848
2849                 if ( $this->undidRev ) {
2850                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2851                 }
2852
2853                 if ( $this->selfRedirect ) {
2854                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2855                 }
2856
2857                 if ( $this->hasPresetSummary ) {
2858                         // If a summary has been preset using &summary= we don't want to prompt for
2859                         // a different summary. Only prompt for a summary if the summary is blanked.
2860                         // (T19416)
2861                         $this->autoSumm = md5( '' );
2862                 }
2863
2864                 $autosumm = $this->autoSumm ?: md5( $this->summary );
2865                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2866
2867                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2868                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2869
2870                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2871                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2872
2873                 $out->enableOOUI();
2874
2875                 if ( $this->section == 'new' ) {
2876                         $this->showSummaryInput( true, $this->summary );
2877                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2878                 }
2879
2880                 $out->addHTML( $this->editFormTextBeforeContent );
2881                 if ( $this->isConflict ) {
2882                         // In an edit conflict, we turn textbox2 into the user's text,
2883                         // and textbox1 into the stored version
2884                         $this->textbox2 = $this->textbox1;
2885
2886                         $content = $this->getCurrentContent();
2887                         $this->textbox1 = $this->toEditText( $content );
2888
2889                         $editConflictHelper = $this->getEditConflictHelper();
2890                         $editConflictHelper->setTextboxes( $this->textbox2, $this->textbox1 );
2891                         $editConflictHelper->setContentModel( $this->contentModel );
2892                         $editConflictHelper->setContentFormat( $this->contentFormat );
2893                         $out->addHTML( $editConflictHelper->getEditFormHtmlBeforeContent() );
2894                 }
2895
2896                 if ( !$this->mTitle->isUserConfigPage() && $showToolbar && $user->getOption( 'showtoolbar' ) ) {
2897                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2898                 }
2899
2900                 if ( $this->blankArticle ) {
2901                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2902                 }
2903
2904                 if ( $this->isConflict ) {
2905                         // In an edit conflict bypass the overridable content form method
2906                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2907                         // resolved between page source edits and custom ui edits using the
2908                         // custom edit ui.
2909                         $conflictTextBoxAttribs = [];
2910                         if ( $this->wasDeletedSinceLastEdit() ) {
2911                                 $conflictTextBoxAttribs['style'] = 'display:none;';
2912                         } elseif ( $this->isOldRev ) {
2913                                 $conflictTextBoxAttribs['class'] = 'mw-textarea-oldrev';
2914                         }
2915
2916                         $out->addHTML( $editConflictHelper->getEditConflictMainTextBox( $conflictTextBoxAttribs ) );
2917                         $out->addHTML( $editConflictHelper->getEditFormHtmlAfterContent() );
2918                 } else {
2919                         $this->showContentForm();
2920                 }
2921
2922                 $out->addHTML( $this->editFormTextAfterContent );
2923
2924                 $this->showStandardInputs();
2925
2926                 $this->showFormAfterText();
2927
2928                 $this->showTosSummary();
2929
2930                 $this->showEditTools();
2931
2932                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2933
2934                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2935
2936                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2937                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2938
2939                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2940                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2941
2942                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2943
2944                 if ( $this->isConflict ) {
2945                         try {
2946                                 $this->showConflict();
2947                         } catch ( MWContentSerializationException $ex ) {
2948                                 // this can't really happen, but be nice if it does.
2949                                 $msg = $this->context->msg(
2950                                         'content-failed-to-parse',
2951                                         $this->contentModel,
2952                                         $this->contentFormat,
2953                                         $ex->getMessage()
2954                                 );
2955                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2956                         }
2957                 }
2958
2959                 // Set a hidden field so JS knows what edit form mode we are in
2960                 if ( $this->isConflict ) {
2961                         $mode = 'conflict';
2962                 } elseif ( $this->preview ) {
2963                         $mode = 'preview';
2964                 } elseif ( $this->diff ) {
2965                         $mode = 'diff';
2966                 } else {
2967                         $mode = 'text';
2968                 }
2969                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2970
2971                 // Marker for detecting truncated form data.  This must be the last
2972                 // parameter sent in order to be of use, so do not move me.
2973                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2974                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2975
2976                 if ( !$user->getOption( 'previewontop' ) ) {
2977                         $this->displayPreviewArea( $previewOutput, false );
2978                 }
2979         }
2980
2981         /**
2982          * Wrapper around TemplatesOnThisPageFormatter to make
2983          * a "templates on this page" list.
2984          *
2985          * @param Title[] $templates
2986          * @return string HTML
2987          */
2988         public function makeTemplatesOnThisPageList( array $templates ) {
2989                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2990                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2991                 );
2992
2993                 // preview if preview, else section if section, else false
2994                 $type = false;
2995                 if ( $this->preview ) {
2996                         $type = 'preview';
2997                 } elseif ( $this->section != '' ) {
2998                         $type = 'section';
2999                 }
3000
3001                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
3002                         $templateListFormatter->format( $templates, $type )
3003                 );
3004         }
3005
3006         /**
3007          * Extract the section title from current section text, if any.
3008          *
3009          * @param string $text
3010          * @return string|bool String or false
3011          */
3012         public static function extractSectionTitle( $text ) {
3013                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
3014                 if ( !empty( $matches[2] ) ) {
3015                         global $wgParser;
3016                         return $wgParser->stripSectionName( trim( $matches[2] ) );
3017                 } else {
3018                         return false;
3019                 }
3020         }
3021
3022         protected function showHeader() {
3023                 $out = $this->context->getOutput();
3024                 $user = $this->context->getUser();
3025                 if ( $this->isConflict ) {
3026                         $this->addExplainConflictHeader( $out );
3027                         $this->editRevId = $this->page->getLatest();
3028                 } else {
3029                         if ( $this->section != '' && $this->section != 'new' ) {
3030                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
3031                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
3032                                         if ( $sectionTitle !== false ) {
3033                                                 $this->summary = "/* $sectionTitle */ ";
3034                                         }
3035                                 }
3036                         }
3037
3038                         $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
3039
3040                         if ( $this->missingComment ) {
3041                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
3042                         }
3043
3044                         if ( $this->missingSummary && $this->section != 'new' ) {
3045                                 $out->wrapWikiMsg(
3046                                         "<div id='mw-missingsummary'>\n$1\n</div>",
3047                                         [ 'missingsummary', $buttonLabel ]
3048                                 );
3049                         }
3050
3051                         if ( $this->missingSummary && $this->section == 'new' ) {
3052                                 $out->wrapWikiMsg(
3053                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
3054                                         [ 'missingcommentheader', $buttonLabel ]
3055                                 );
3056                         }
3057
3058                         if ( $this->blankArticle ) {
3059                                 $out->wrapWikiMsg(
3060                                         "<div id='mw-blankarticle'>\n$1\n</div>",
3061                                         [ 'blankarticle', $buttonLabel ]
3062                                 );
3063                         }
3064
3065                         if ( $this->selfRedirect ) {
3066                                 $out->wrapWikiMsg(
3067                                         "<div id='mw-selfredirect'>\n$1\n</div>",
3068                                         [ 'selfredirect', $buttonLabel ]
3069                                 );
3070                         }
3071
3072                         if ( $this->hookError !== '' ) {
3073                                 $out->addWikiText( $this->hookError );
3074                         }
3075
3076                         if ( $this->section != 'new' ) {
3077                                 $revision = $this->mArticle->getRevisionFetched();
3078                                 if ( $revision ) {
3079                                         // Let sysop know that this will make private content public if saved
3080
3081                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $user ) ) {
3082                                                 $out->wrapWikiMsg(
3083                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3084                                                         'rev-deleted-text-permission'
3085                                                 );
3086                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
3087                                                 $out->wrapWikiMsg(
3088                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
3089                                                         'rev-deleted-text-view'
3090                                                 );
3091                                         }
3092
3093                                         if ( !$revision->isCurrent() ) {
3094                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
3095                                                 $out->addWikiMsg( 'editingold' );
3096                                                 $this->isOldRev = true;
3097                                         }
3098                                 } elseif ( $this->mTitle->exists() ) {
3099                                         // Something went wrong
3100
3101                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
3102                                                 [ 'missing-revision', $this->oldid ] );
3103                                 }
3104                         }
3105                 }
3106
3107                 if ( wfReadOnly() ) {
3108                         $out->wrapWikiMsg(
3109                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
3110                                 [ 'readonlywarning', wfReadOnlyReason() ]
3111                         );
3112                 } elseif ( $user->isAnon() ) {
3113                         if ( $this->formtype != 'preview' ) {
3114                                 $out->wrapWikiMsg(
3115                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3116                                         [ 'anoneditwarning',
3117                                                 // Log-in link
3118                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3119                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3120                                                 ] ),
3121                                                 // Sign-up link
3122                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3123                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3124                                                 ] )
3125                                         ]
3126                                 );
3127                         } else {
3128                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3129                                         'anonpreviewwarning'
3130                                 );
3131                         }
3132                 } else {
3133                         if ( $this->mTitle->isUserConfigPage() ) {
3134                                 # Check the skin exists
3135                                 if ( $this->isWrongCaseUserConfigPage() ) {
3136                                         $out->wrapWikiMsg(
3137                                                 "<div class='error' id='mw-userinvalidconfigtitle'>\n$1\n</div>",
3138                                                 [ 'userinvalidconfigtitle', $this->mTitle->getSkinFromConfigSubpage() ]
3139                                         );
3140                                 }
3141                                 if ( $this->getTitle()->isSubpageOf( $user->getUserPage() ) ) {
3142                                         $isUserCssConfig = $this->mTitle->isUserCssConfigPage();
3143                                         $isUserJsonConfig = $this->mTitle->isUserJsonConfigPage();
3144                                         $isUserJsConfig = $this->mTitle->isUserJsConfigPage();
3145
3146                                         $warning = $isUserCssConfig
3147                                                 ? 'usercssispublic'
3148                                                 : ( $isUserJsonConfig ? 'userjsonispublic' : 'userjsispublic' );
3149
3150                                         $out->wrapWikiMsg( '<div class="mw-userconfigpublic">$1</div>', $warning );
3151
3152                                         if ( $this->formtype !== 'preview' ) {
3153                                                 $config = $this->context->getConfig();
3154                                                 if ( $isUserCssConfig && $config->get( 'AllowUserCss' ) ) {
3155                                                         $out->wrapWikiMsg(
3156                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3157                                                                 [ 'usercssyoucanpreview' ]
3158                                                         );
3159                                                 } elseif ( $isUserJsonConfig /* No comparable 'AllowUserJson' */ ) {
3160                                                         $out->wrapWikiMsg(
3161                                                                 "<div id='mw-userjsonyoucanpreview'>\n$1\n</div>",
3162                                                                 [ 'userjsonyoucanpreview' ]
3163                                                         );
3164                                                 } elseif ( $isUserJsConfig && $config->get( 'AllowUserJs' ) ) {
3165                                                         $out->wrapWikiMsg(
3166                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3167                                                                 [ 'userjsyoucanpreview' ]
3168                                                         );
3169                                                 }
3170                                         }
3171                                 }
3172                         }
3173                 }
3174
3175                 $this->addPageProtectionWarningHeaders();
3176
3177                 $this->addLongPageWarningHeader();
3178
3179                 # Add header copyright warning
3180                 $this->showHeaderCopyrightWarning();
3181         }
3182
3183         /**
3184          * Helper function for summary input functions, which returns the necessary
3185          * attributes for the input.
3186          *
3187          * @param array|null $inputAttrs Array of attrs to use on the input
3188          * @return array
3189          */
3190         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3191                 $conf = $this->context->getConfig();
3192                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
3193                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
3194                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
3195                 // Unicode codepoints (or 255 UTF-8 bytes for old schema).
3196                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3197                         'id' => 'wpSummary',
3198                         'name' => 'wpSummary',
3199                         'maxlength' => $oldCommentSchema ? 200 : CommentStore::COMMENT_CHARACTER_LIMIT,
3200                         'tabindex' => 1,
3201                         'size' => 60,
3202                         'spellcheck' => 'true',
3203                 ];
3204         }
3205
3206         /**
3207          * Builds a standard summary input with a label.
3208          *
3209          * @param string $summary The value of the summary input
3210          * @param string|null $labelText The html to place inside the label
3211          * @param array|null $inputAttrs Array of attrs to use on the input
3212          *
3213          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3214          */
3215         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3216                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3217                         $this->getSummaryInputAttributes( $inputAttrs )
3218                 );
3219                 $inputAttrs += [
3220                         'title' => Linker::titleAttrib( 'summary' ),
3221                         'accessKey' => Linker::accesskey( 'summary' ),
3222                 ];
3223
3224                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3225                 $inputAttrs['inputId'] = $inputAttrs['id'];
3226                 $inputAttrs['id'] = 'wpSummaryWidget';
3227
3228                 return new OOUI\FieldLayout(
3229                         new OOUI\TextInputWidget( [
3230                                 'value' => $summary,
3231                                 'infusable' => true,
3232                         ] + $inputAttrs ),
3233                         [
3234                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3235                                 'align' => 'top',
3236                                 'id' => 'wpSummaryLabel',
3237                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3238                         ]
3239                 );
3240         }
3241
3242         /**
3243          * @param bool $isSubjectPreview True if this is the section subject/title
3244          *   up top, or false if this is the comment summary
3245          *   down below the textarea
3246          * @param string $summary The text of the summary to display
3247          */
3248         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3249                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3250                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3251                 if ( $isSubjectPreview ) {
3252                         if ( $this->nosummary ) {
3253                                 return;
3254                         }
3255                 } else {
3256                         if ( !$this->mShowSummaryField ) {
3257                                 return;
3258                         }
3259                 }
3260
3261                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3262                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3263                                 $summary,
3264                                 $labelText,
3265                                 [ 'class' => $summaryClass ]
3266                         ) );
3267         }
3268
3269         /**
3270          * @param bool $isSubjectPreview True if this is the section subject/title
3271          *   up top, or false if this is the comment summary
3272          *   down below the textarea
3273          * @param string $summary The text of the summary to display
3274          * @return string
3275          */
3276         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3277                 // avoid spaces in preview, gets always trimmed on save
3278                 $summary = trim( $summary );
3279                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3280                         return "";
3281                 }
3282
3283                 global $wgParser;
3284
3285                 if ( $isSubjectPreview ) {
3286                         $summary = $this->context->msg( 'newsectionsummary' )
3287                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3288                                 ->inContentLanguage()->text();
3289                 }
3290
3291                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3292
3293                 $summary = $this->context->msg( $message )->parse()
3294                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3295                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3296         }
3297
3298         protected function showFormBeforeText() {
3299                 $out = $this->context->getOutput();
3300                 $out->addHTML( Html::hidden( 'wpSection', $this->section ) );
3301                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3302                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3303                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3304                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3305         }
3306
3307         protected function showFormAfterText() {
3308                 /**
3309                  * To make it harder for someone to slip a user a page
3310                  * which submits an edit form to the wiki without their
3311                  * knowledge, a random token is associated with the login
3312                  * session. If it's not passed back with the submission,
3313                  * we won't save the page, or render user JavaScript and
3314                  * CSS previews.
3315                  *
3316                  * For anon editors, who may not have a session, we just
3317                  * include the constant suffix to prevent editing from
3318                  * broken text-mangling proxies.
3319                  */
3320                 $this->context->getOutput()->addHTML(
3321                         "\n" .
3322                         Html::hidden( "wpEditToken", $this->context->getUser()->getEditToken() ) .
3323                         "\n"
3324                 );
3325         }
3326
3327         /**
3328          * Subpage overridable method for printing the form for page content editing
3329          * By default this simply outputs wpTextbox1
3330          * Subclasses can override this to provide a custom UI for editing;
3331          * be it a form, or simply wpTextbox1 with a modified content that will be
3332          * reverse modified when extracted from the post data.
3333          * Note that this is basically the inverse for importContentFormData
3334          */
3335         protected function showContentForm() {
3336                 $this->showTextbox1();
3337         }
3338
3339         /**
3340          * Method to output wpTextbox1
3341          * The $textoverride method can be used by subclasses overriding showContentForm
3342          * to pass back to this method.
3343          *
3344          * @param array|null $customAttribs Array of html attributes to use in the textarea
3345          * @param string|null $textoverride Optional text to override $this->textarea1 with
3346          */
3347         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3348                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3349                         $attribs = [ 'style' => 'display:none;' ];
3350                 } else {
3351                         $builder = new TextboxBuilder();
3352                         $classes = $builder->getTextboxProtectionCSSClasses( $this->getTitle() );
3353
3354                         # Is an old revision being edited?
3355                         if ( $this->isOldRev ) {
3356                                 $classes[] = 'mw-textarea-oldrev';
3357                         }
3358
3359                         $attribs = [ 'tabindex' => 1 ];
3360
3361                         if ( is_array( $customAttribs ) ) {
3362                                 $attribs += $customAttribs;
3363                         }
3364
3365                         $attribs = $builder->mergeClassesIntoAttributes( $classes, $attribs );
3366                 }
3367
3368                 $this->showTextbox(
3369                         $textoverride ?? $this->textbox1,
3370                         'wpTextbox1',
3371                         $attribs
3372                 );
3373         }
3374
3375         protected function showTextbox2() {
3376                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3377         }
3378
3379         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3380                 $builder = new TextboxBuilder();
3381                 $attribs = $builder->buildTextboxAttribs(
3382                         $name,
3383                         $customAttribs,
3384                         $this->context->getUser(),
3385                         $this->mTitle
3386                 );
3387
3388                 $this->context->getOutput()->addHTML(
3389                         Html::textarea( $name, $builder->addNewLineAtEnd( $text ), $attribs )
3390                 );
3391         }
3392
3393         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3394                 $classes = [];
3395                 if ( $isOnTop ) {
3396                         $classes[] = 'ontop';
3397                 }
3398
3399                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3400
3401                 if ( $this->formtype != 'preview' ) {
3402                         $attribs['style'] = 'display: none;';
3403                 }
3404
3405                 $out = $this->context->getOutput();
3406                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3407
3408                 if ( $this->formtype == 'preview' ) {
3409                         $this->showPreview( $previewOutput );
3410                 } else {
3411                         // Empty content container for LivePreview
3412                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3413                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3414                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3415                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3416                 }
3417
3418                 $out->addHTML( '</div>' );
3419
3420                 if ( $this->formtype == 'diff' ) {
3421                         try {
3422                                 $this->showDiff();
3423                         } catch ( MWContentSerializationException $ex ) {
3424                                 $msg = $this->context->msg(
3425                                         'content-failed-to-parse',
3426                                         $this->contentModel,
3427                                         $this->contentFormat,
3428                                         $ex->getMessage()
3429                                 );
3430                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3431                         }
3432                 }
3433         }
3434
3435         /**
3436          * Append preview output to OutputPage.
3437          * Includes category rendering if this is a category page.
3438          *
3439          * @param string $text The HTML to be output for the preview.
3440          */
3441         protected function showPreview( $text ) {
3442                 if ( $this->mArticle instanceof CategoryPage ) {
3443                         $this->mArticle->openShowCategory();
3444                 }
3445                 # This hook seems slightly odd here, but makes things more
3446                 # consistent for extensions.
3447                 $out = $this->context->getOutput();
3448                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3449                 $out->addHTML( $text );
3450                 if ( $this->mArticle instanceof CategoryPage ) {
3451                         $this->mArticle->closeShowCategory();
3452                 }
3453         }
3454
3455         /**
3456          * Get a diff between the current contents of the edit box and the
3457          * version of the page we're editing from.
3458          *
3459          * If this is a section edit, we'll replace the section as for final
3460          * save and then make a comparison.
3461          */
3462         public function showDiff() {
3463                 $oldtitlemsg = 'currentrev';
3464                 # if message does not exist, show diff against the preloaded default
3465                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3466                         $oldtext = $this->mTitle->getDefaultMessageText();
3467                         if ( $oldtext !== false ) {
3468                                 $oldtitlemsg = 'defaultmessagetext';
3469                                 $oldContent = $this->toEditContent( $oldtext );
3470                         } else {
3471                                 $oldContent = null;
3472                         }
3473                 } else {
3474                         $oldContent = $this->getCurrentContent();
3475                 }
3476
3477                 $textboxContent = $this->toEditContent( $this->textbox1 );
3478                 if ( $this->editRevId !== null ) {
3479                         $newContent = $this->page->replaceSectionAtRev(
3480                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3481                         );
3482                 } else {
3483                         $newContent = $this->page->replaceSectionContent(
3484                                 $this->section, $textboxContent, $this->summary, $this->edittime
3485                         );
3486                 }
3487
3488                 if ( $newContent ) {
3489                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3490
3491                         $user = $this->context->getUser();
3492                         $popts = ParserOptions::newFromUserAndLang( $user,
3493                                 MediaWikiServices::getInstance()->getContentLanguage() );
3494                         $newContent = $newContent->preSaveTransform( $this->mTitle, $user, $popts );
3495                 }
3496
3497                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3498                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3499                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3500
3501                         if ( !$oldContent ) {
3502                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3503                         }
3504
3505                         if ( !$newContent ) {
3506                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3507                         }
3508
3509                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->context );
3510                         $de->setContent( $oldContent, $newContent );
3511
3512                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3513                         $de->showDiffStyle();
3514                 } else {
3515                         $difftext = '';
3516                 }
3517
3518                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3519         }
3520
3521         /**
3522          * Show the header copyright warning.
3523          */
3524         protected function showHeaderCopyrightWarning() {
3525                 $msg = 'editpage-head-copy-warn';
3526                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3527                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3528                                 'editpage-head-copy-warn' );
3529                 }
3530         }
3531
3532         /**
3533          * Give a chance for site and per-namespace customizations of
3534          * terms of service summary link that might exist separately
3535          * from the copyright notice.
3536          *
3537          * This will display between the save button and the edit tools,
3538          * so should remain short!
3539          */
3540         protected function showTosSummary() {
3541                 $msg = 'editpage-tos-summary';
3542                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3543                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3544                         $out = $this->context->getOutput();
3545                         $out->addHTML( '<div class="mw-tos-summary">' );
3546                         $out->addWikiMsg( $msg );
3547                         $out->addHTML( '</div>' );
3548                 }
3549         }
3550
3551         /**
3552          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3553          * characters not present on most keyboards for copying/pasting.
3554          */
3555         protected function showEditTools() {
3556                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3557                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3558                         '</div>' );
3559         }
3560
3561         /**
3562          * Get the copyright warning
3563          *
3564          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3565          * @return string
3566          */
3567         protected function getCopywarn() {
3568                 return self::getCopyrightWarning( $this->mTitle );
3569         }
3570
3571         /**
3572          * Get the copyright warning, by default returns wikitext
3573          *
3574          * @param Title $title
3575          * @param string $format Output format, valid values are any function of a Message object
3576          * @param Language|string|null $langcode Language code or Language object.
3577          * @return string
3578          */
3579         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3580                 global $wgRightsText;
3581                 if ( $wgRightsText ) {
3582                         $copywarnMsg = [ 'copyrightwarning',
3583                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3584                                 $wgRightsText ];
3585                 } else {
3586                         $copywarnMsg = [ 'copyrightwarning2',
3587                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3588                 }
3589                 // Allow for site and per-namespace customization of contribution/copyright notice.
3590                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3591
3592                 $msg = wfMessage( ...$copywarnMsg )->title( $title );
3593                 if ( $langcode ) {
3594                         $msg->inLanguage( $langcode );
3595                 }
3596                 return "<div id=\"editpage-copywarn\">\n" .
3597                         $msg->$format() . "\n</div>";
3598         }
3599
3600         /**
3601          * Get the Limit report for page previews
3602          *
3603          * @since 1.22
3604          * @param ParserOutput|null $output ParserOutput object from the parse
3605          * @return string HTML
3606          */
3607         public static function getPreviewLimitReport( ParserOutput $output = null ) {
3608                 global $wgLang;
3609
3610                 if ( !$output || !$output->getLimitReportData() ) {
3611                         return '';
3612                 }
3613
3614                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3615                         wfMessage( 'limitreport-title' )->parseAsBlock()
3616                 );
3617
3618                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3619                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3620
3621                 $limitReport .= Html::openElement( 'table', [
3622                         'class' => 'preview-limit-report wikitable'
3623                 ] ) .
3624                         Html::openElement( 'tbody' );
3625
3626                 foreach ( $output->getLimitReportData() as $key => $value ) {
3627                         if ( Hooks::run( 'ParserLimitReportFormat',
3628                                 [ $key, &$value, &$limitReport, true, true ]
3629                         ) ) {
3630                                 $keyMsg = wfMessage( $key );
3631                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3632                                 if ( !$valueMsg->exists() ) {
3633                                         $valueMsg = new RawMessage( '$1' );
3634                                 }
3635                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3636                                         $limitReport .= Html::openElement( 'tr' ) .
3637                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3638                                                 Html::rawElement( 'td', null,
3639                                                         $wgLang->formatNum( $valueMsg->params( $value )->parse() )
3640                                                 ) .
3641                                                 Html::closeElement( 'tr' );
3642                                 }
3643                         }
3644                 }
3645
3646                 $limitReport .= Html::closeElement( 'tbody' ) .
3647                         Html::closeElement( 'table' ) .
3648                         Html::closeElement( 'div' );
3649
3650                 return $limitReport;
3651         }
3652
3653         protected function showStandardInputs( &$tabindex = 2 ) {
3654                 $out = $this->context->getOutput();
3655                 $out->addHTML( "<div class='editOptions'>\n" );
3656
3657                 if ( $this->section != 'new' ) {
3658                         $this->showSummaryInput( false, $this->summary );
3659                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3660                 }
3661
3662                 $checkboxes = $this->getCheckboxesWidget(
3663                         $tabindex,
3664                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3665                 );
3666                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3667
3668                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3669
3670                 // Show copyright warning.
3671                 $out->addWikiText( $this->getCopywarn() );
3672                 $out->addHTML( $this->editFormTextAfterWarn );
3673
3674                 $out->addHTML( "<div class='editButtons'>\n" );
3675                 $out->addHTML( implode( "\n", $this->getEditButtons( $tabindex ) ) . "\n" );
3676
3677                 $cancel = $this->getCancelLink();
3678
3679                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3680                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3681                 $edithelp =
3682                         Html::linkButton(
3683                                 $this->context->msg( 'edithelp' )->text(),
3684                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3685                                 [ 'mw-ui-quiet' ]
3686                         ) .
3687                         $this->context->msg( 'word-separator' )->escaped() .
3688                         $this->context->msg( 'newwindow' )->parse();
3689
3690                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3691                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3692                 $out->addHTML( "</div><!-- editButtons -->\n" );
3693
3694                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3695
3696                 $out->addHTML( "</div><!-- editOptions -->\n" );
3697         }
3698
3699         /**
3700          * Show an edit conflict. textbox1 is already shown in showEditForm().
3701          * If you want to use another entry point to this function, be careful.
3702          */
3703         protected function showConflict() {
3704                 $out = $this->context->getOutput();
3705                 // Avoid PHP 7.1 warning of passing $this by reference
3706                 $editPage = $this;
3707                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3708                         $this->incrementConflictStats();
3709
3710                         $this->getEditConflictHelper()->showEditFormTextAfterFooters();
3711                 }
3712         }
3713
3714         protected function incrementConflictStats() {
3715                 $this->getEditConflictHelper()->incrementConflictStats();
3716         }
3717
3718         /**
3719          * @return string
3720          */
3721         public function getCancelLink() {
3722                 $cancelParams = [];
3723                 if ( !$this->isConflict && $this->oldid > 0 ) {
3724                         $cancelParams['oldid'] = $this->oldid;
3725                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3726                         $cancelParams['redirect'] = 'no';
3727                 }
3728
3729                 return new OOUI\ButtonWidget( [
3730                         'id' => 'mw-editform-cancel',
3731                         'href' => $this->getContextTitle()->getLinkURL( $cancelParams ),
3732                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3733                         'framed' => false,
3734                         'infusable' => true,
3735                         'flags' => 'destructive',
3736                 ] );
3737         }
3738
3739         /**
3740          * Returns the URL to use in the form's action attribute.
3741          * This is used by EditPage subclasses when simply customizing the action
3742          * variable in the constructor is not enough. This can be used when the
3743          * EditPage lives inside of a Special page rather than a custom page action.
3744          *
3745          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3746          * @return string
3747          */
3748         protected function getActionURL( Title $title ) {
3749                 return $title->getLocalURL( [ 'action' => $this->action ] );
3750         }
3751
3752         /**
3753          * Check if a page was deleted while the user was editing it, before submit.
3754          * Note that we rely on the logging table, which hasn't been always there,
3755          * but that doesn't matter, because this only applies to brand new
3756          * deletes.
3757          * @return bool
3758          */
3759         protected function wasDeletedSinceLastEdit() {
3760                 if ( $this->deletedSinceEdit !== null ) {
3761                         return $this->deletedSinceEdit;
3762                 }
3763
3764                 $this->deletedSinceEdit = false;
3765
3766                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3767                         $this->lastDelete = $this->getLastDelete();
3768                         if ( $this->lastDelete ) {
3769                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3770                                 if ( $deleteTime > $this->starttime ) {
3771                                         $this->deletedSinceEdit = true;
3772                                 }
3773                         }
3774                 }
3775
3776                 return $this->deletedSinceEdit;
3777         }
3778
3779         /**
3780          * Get the last log record of this page being deleted, if ever.  This is
3781          * used to detect whether a delete occured during editing.
3782          * @return bool|stdClass
3783          */
3784         protected function getLastDelete() {
3785                 $dbr = wfGetDB( DB_REPLICA );
3786                 $commentQuery = CommentStore::getStore()->getJoin( 'log_comment' );
3787                 $actorQuery = ActorMigration::newMigration()->getJoin( 'log_user' );
3788                 $data = $dbr->selectRow(
3789                         array_merge( [ 'logging' ], $commentQuery['tables'], $actorQuery['tables'], [ 'user' ] ),
3790                         [
3791                                 'log_type',
3792                                 'log_action',
3793                                 'log_timestamp',
3794                                 'log_namespace',
3795                                 'log_title',
3796                                 'log_params',
3797                                 'log_deleted',
3798                                 'user_name'
3799                         ] + $commentQuery['fields'] + $actorQuery['fields'],
3800                         [
3801                                 'log_namespace' => $this->mTitle->getNamespace(),
3802                                 'log_title' => $this->mTitle->getDBkey(),
3803                                 'log_type' => 'delete',
3804                                 'log_action' => 'delete',
3805                         ],
3806                         __METHOD__,
3807                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3808                         [
3809                                 'user' => [ 'JOIN', 'user_id=' . $actorQuery['fields']['log_user'] ],
3810                         ] + $commentQuery['joins'] + $actorQuery['joins']
3811                 );
3812                 // Quick paranoid permission checks...
3813                 if ( is_object( $data ) ) {
3814                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3815                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3816                         }
3817
3818                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3819                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3820                                 $data->log_comment_data = null;
3821                         }
3822                 }
3823
3824                 return $data;
3825         }
3826
3827         /**
3828          * Get the rendered text for previewing.
3829          * @throws MWException
3830          * @return string
3831          */
3832         public function getPreviewText() {
3833                 $out = $this->context->getOutput();
3834                 $config = $this->context->getConfig();
3835
3836                 if ( $config->get( 'RawHtml' ) && !$this->mTokenOk ) {
3837                         // Could be an offsite preview attempt. This is very unsafe if
3838                         // HTML is enabled, as it could be an attack.
3839                         $parsedNote = '';
3840                         if ( $this->textbox1 !== '' ) {
3841                                 // Do not put big scary notice, if previewing the empty
3842                                 // string, which happens when you initially edit
3843                                 // a category page, due to automatic preview-on-open.
3844                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3845                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3846                                         true, /* interface */true );
3847                         }
3848                         $this->incrementEditFailureStats( 'session_loss' );
3849                         return $parsedNote;
3850                 }
3851
3852                 $note = '';
3853
3854                 try {
3855                         $content = $this->toEditContent( $this->textbox1 );
3856
3857                         $previewHTML = '';
3858                         if ( !Hooks::run(
3859                                 'AlternateEditPreview',
3860                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3861                         ) {
3862                                 return $previewHTML;
3863                         }
3864
3865                         # provide a anchor link to the editform
3866                         $continueEditing = '<span class="mw-continue-editing">' .
3867                                 '[[#' . self::EDITFORM_ID . '|' .
3868                                 $this->context->getLanguage()->getArrow() . ' ' .
3869                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3870                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3871                                 if ( $this->mTokenOkExceptSuffix ) {
3872                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3873                                         $this->incrementEditFailureStats( 'bad_token' );
3874                                 } else {
3875                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3876                                         $this->incrementEditFailureStats( 'session_loss' );
3877                                 }
3878                         } elseif ( $this->incompleteForm ) {
3879                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3880                                 if ( $this->mTriedSave ) {
3881                                         $this->incrementEditFailureStats( 'incomplete_form' );
3882                                 }
3883                         } else {
3884                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3885                         }
3886
3887                         # don't parse non-wikitext pages, show message about preview
3888                         if ( $this->mTitle->isUserConfigPage() || $this->mTitle->isSiteConfigPage() ) {
3889                                 if ( $this->mTitle->isUserConfigPage() ) {
3890                                         $level = 'user';
3891                                 } elseif ( $this->mTitle->isSiteConfigPage() ) {
3892                                         $level = 'site';
3893                                 } else {
3894                                         $level = false;
3895                                 }
3896
3897                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3898                                         $format = 'css';
3899                                         if ( $level === 'user' && !$config->get( 'AllowUserCss' ) ) {
3900                                                 $format = false;
3901                                         }
3902                                 } elseif ( $content->getModel() == CONTENT_MODEL_JSON ) {
3903                                         $format = 'json';
3904                                         if ( $level === 'user' /* No comparable 'AllowUserJson' */ ) {
3905                                                 $format = false;
3906                                         }
3907                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3908                                         $format = 'js';
3909                                         if ( $level === 'user' && !$config->get( 'AllowUserJs' ) ) {
3910                                                 $format = false;
3911                                         }
3912                                 } else {
3913                                         $format = false;
3914                                 }
3915
3916                                 # Used messages to make sure grep find them:
3917                                 # Messages: usercsspreview, userjsonpreview, userjspreview,
3918                                 #   sitecsspreview, sitejsonpreview, sitejspreview
3919                                 if ( $level && $format ) {
3920                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3921                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3922                                                 ' ' . $continueEditing . "</div>";
3923                                 }
3924                         }
3925
3926                         # If we're adding a comment, we need to show the
3927                         # summary as the headline
3928                         if ( $this->section === "new" && $this->summary !== "" ) {
3929                                 $content = $content->addSectionHeader( $this->summary );
3930                         }
3931
3932                         $hook_args = [ $this, &$content ];
3933                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3934
3935                         $parserResult = $this->doPreviewParse( $content );
3936                         $parserOutput = $parserResult['parserOutput'];
3937                         $previewHTML = $parserResult['html'];
3938                         $this->mParserOutput = $parserOutput;
3939                         $out->addParserOutputMetadata( $parserOutput );
3940                         if ( $out->userCanPreview() ) {
3941                                 $out->addContentOverride( $this->getTitle(), $content );
3942                         }
3943
3944                         if ( count( $parserOutput->getWarnings() ) ) {
3945                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3946                         }
3947
3948                 } catch ( MWContentSerializationException $ex ) {
3949                         $m = $this->context->msg(
3950                                 'content-failed-to-parse',
3951                                 $this->contentModel,
3952                                 $this->contentFormat,
3953                                 $ex->getMessage()
3954                         );
3955                         $note .= "\n\n" . $m->parse();
3956                         $previewHTML = '';
3957                 }
3958
3959                 if ( $this->isConflict ) {
3960                         $conflict = '<h2 id="mw-previewconflict">'
3961                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3962                 } else {
3963                         $conflict = '<hr />';
3964                 }
3965
3966                 $previewhead = "<div class='previewnote'>\n" .
3967                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3968                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3969
3970                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3971                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3972                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3973                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3974
3975                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3976         }
3977
3978         private function incrementEditFailureStats( $failureType ) {
3979                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3980                 $stats->increment( 'edit.failures.' . $failureType );
3981         }
3982
3983         /**
3984          * Get parser options for a preview
3985          * @return ParserOptions
3986          */
3987         protected function getPreviewParserOptions() {
3988                 $parserOptions = $this->page->makeParserOptions( $this->context );
3989                 $parserOptions->setIsPreview( true );
3990                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3991                 $parserOptions->enableLimitReport();
3992                 return $parserOptions;
3993         }
3994
3995         /**
3996          * Parse the page for a preview. Subclasses may override this class, in order
3997          * to parse with different options, or to otherwise modify the preview HTML.
3998          *
3999          * @param Content $content The page content
4000          * @return array with keys:
4001          *   - parserOutput: The ParserOutput object
4002          *   - html: The HTML to be displayed
4003          */
4004         protected function doPreviewParse( Content $content ) {
4005                 $user = $this->context->getUser();
4006                 $parserOptions = $this->getPreviewParserOptions();
4007                 $pstContent = $content->preSaveTransform( $this->mTitle, $user, $parserOptions );
4008                 $scopedCallback = $parserOptions->setupFakeRevision(
4009                         $this->mTitle, $pstContent, $user );
4010                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
4011                 ScopedCallback::consume( $scopedCallback );
4012                 return [
4013                         'parserOutput' => $parserOutput,
4014                         'html' => $parserOutput->getText( [
4015                                 'enableSectionEditLinks' => false
4016                         ] )
4017                 ];
4018         }
4019
4020         /**
4021          * @return array
4022          */
4023         public function getTemplates() {
4024                 if ( $this->preview || $this->section != '' ) {
4025                         $templates = [];
4026                         if ( !isset( $this->mParserOutput ) ) {
4027                                 return $templates;
4028                         }
4029                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
4030                                 foreach ( array_keys( $template ) as $dbk ) {
4031                                         $templates[] = Title::makeTitle( $ns, $dbk );
4032                                 }
4033                         }
4034                         return $templates;
4035                 } else {
4036                         return $this->mTitle->getTemplateLinksFrom();
4037                 }
4038         }
4039
4040         /**
4041          * Shows a bulletin board style toolbar for common editing functions.
4042          * It can be disabled in the user preferences.
4043          *
4044          * @param Title|null $title Title object for the page being edited (optional)
4045          * @return string
4046          */
4047         public static function getEditToolbar( $title = null ) {
4048                 global $wgOut, $wgEnableUploads, $wgForeignFileRepos;
4049
4050                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4051                 $showSignature = true;
4052                 if ( $title ) {
4053                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4054                 }
4055
4056                 $contLang = MediaWikiServices::getInstance()->getContentLanguage();
4057
4058                 /**
4059                  * $toolarray is an array of arrays each of which includes the
4060                  * opening tag, the closing tag, optionally a sample text that is
4061                  * inserted between the two when no selection is highlighted
4062                  * and.  The tip text is shown when the user moves the mouse
4063                  * over the button.
4064                  *
4065                  * Images are defined in ResourceLoaderEditToolbarModule.
4066                  */
4067                 $toolarray = [
4068                         [
4069                                 'id'     => 'mw-editbutton-bold',
4070                                 'open'   => '\'\'\'',
4071                                 'close'  => '\'\'\'',
4072                                 'sample' => wfMessage( 'bold_sample' )->text(),
4073                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4074                         ],
4075                         [
4076                                 'id'     => 'mw-editbutton-italic',
4077                                 'open'   => '\'\'',
4078                                 'close'  => '\'\'',
4079                                 'sample' => wfMessage( 'italic_sample' )->text(),
4080                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4081                         ],
4082                         [
4083                                 'id'     => 'mw-editbutton-link',
4084                                 'open'   => '[[',
4085                                 'close'  => ']]',
4086                                 'sample' => wfMessage( 'link_sample' )->text(),
4087                                 'tip'    => wfMessage( 'link_tip' )->text(),
4088                         ],
4089                         [
4090                                 'id'     => 'mw-editbutton-extlink',
4091                                 'open'   => '[',
4092                                 'close'  => ']',
4093                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4094                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4095                         ],
4096                         [
4097                                 'id'     => 'mw-editbutton-headline',
4098                                 'open'   => "\n== ",
4099                                 'close'  => " ==\n",
4100                                 'sample' => wfMessage( 'headline_sample' )->text(),
4101                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4102                         ],
4103                         $imagesAvailable ? [
4104                                 'id'     => 'mw-editbutton-image',
4105                                 'open'   => '[[' . $contLang->getNsText( NS_FILE ) . ':',
4106                                 'close'  => ']]',
4107                                 'sample' => wfMessage( 'image_sample' )->text(),
4108                                 'tip'    => wfMessage( 'image_tip' )->text(),
4109                         ] : false,
4110                         $imagesAvailable ? [
4111                                 'id'     => 'mw-editbutton-media',
4112                                 'open'   => '[[' . $contLang->getNsText( NS_MEDIA ) . ':',
4113                                 'close'  => ']]',
4114                                 'sample' => wfMessage( 'media_sample' )->text(),
4115                                 'tip'    => wfMessage( 'media_tip' )->text(),
4116                         ] : false,
4117                         [
4118                                 'id'     => 'mw-editbutton-nowiki',
4119                                 'open'   => "<nowiki>",
4120                                 'close'  => "</nowiki>",
4121                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4122                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4123                         ],
4124                         $showSignature ? [
4125                                 'id'     => 'mw-editbutton-signature',
4126                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4127                                 'close'  => '',
4128                                 'sample' => '',
4129                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4130                         ] : false,
4131                         [
4132                                 'id'     => 'mw-editbutton-hr',
4133                                 'open'   => "\n----\n",
4134                                 'close'  => '',
4135                                 'sample' => '',
4136                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4137                         ]
4138                 ];
4139
4140                 $script = '';
4141                 foreach ( $toolarray as $tool ) {
4142                         if ( !$tool ) {
4143                                 continue;
4144                         }
4145
4146                         $params = [
4147                                 // Images are defined in ResourceLoaderEditToolbarModule
4148                                 false,
4149                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4150                                 // Older browsers show a "speedtip" type message only for ALT.
4151                                 // Ideally these should be different, realistically they
4152                                 // probably don't need to be.
4153                                 $tool['tip'],
4154                                 $tool['open'],
4155                                 $tool['close'],
4156                                 $tool['sample'],
4157                                 $tool['id'],
4158                         ];
4159
4160                         $script .= Xml::encodeJsCall(
4161                                 'mw.toolbar.addButton',
4162                                 $params,
4163                                 ResourceLoader::inDebugMode()
4164                         );
4165                 }
4166
4167                 $toolbar = '<div id="toolbar"></div>';
4168
4169                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4170                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4171                         // been over-written by a hook caller
4172                         $nonce = $wgOut->getCSPNonce();
4173                         $wgOut->addScript( Html::inlineScript(
4174                                 ResourceLoader::makeInlineCodeWithModule( 'mediawiki.toolbar', $script ),
4175                                 $nonce
4176                         ) );
4177                 };
4178
4179                 return $toolbar;
4180         }
4181
4182         /**
4183          * Return an array of checkbox definitions.
4184          *
4185          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4186          *
4187          * Array values are associative arrays with the following keys:
4188          *  - 'label-message' (required): message for label text
4189          *  - 'id' (required): 'id' attribute for the `<input>`
4190          *  - 'default' (required): default checkedness (true or false)
4191          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4192          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4193          *    from messages like 'tooltip-foo', 'accesskey-foo'
4194          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4195          *  - 'legacy-name' (optional): short name for backwards-compatibility
4196          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4197          *   where bool indicates the checked status of the checkbox
4198          * @return array
4199          */
4200         public function getCheckboxesDefinition( $checked ) {
4201                 $checkboxes = [];
4202
4203                 $user = $this->context->getUser();
4204                 // don't show the minor edit checkbox if it's a new page or section
4205                 if ( !$this->isNew && $user->isAllowed( 'minoredit' ) ) {
4206                         $checkboxes['wpMinoredit'] = [
4207                                 'id' => 'wpMinoredit',
4208                                 'label-message' => 'minoredit',
4209                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4210                                 'tooltip' => 'minoredit',
4211                                 'label-id' => 'mw-editpage-minoredit',
4212                                 'legacy-name' => 'minor',
4213                                 'default' => $checked['minor'],
4214                         ];
4215                 }
4216
4217                 if ( $user->isLoggedIn() ) {
4218                         $checkboxes['wpWatchthis'] = [
4219                                 'id' => 'wpWatchthis',
4220                                 'label-message' => 'watchthis',
4221                                 // Uses messages: tooltip-watch, accesskey-watch
4222                                 'tooltip' => 'watch',
4223                                 'label-id' => 'mw-editpage-watch',
4224                                 'legacy-name' => 'watch',
4225                                 'default' => $checked['watch'],
4226                         ];
4227                 }
4228
4229                 $editPage = $this;
4230                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4231
4232                 return $checkboxes;
4233         }
4234
4235         /**
4236          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4237          * any other added by extensions.
4238          *
4239          * @param int &$tabindex Current tabindex
4240          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4241          *                 status of the checkbox
4242          *
4243          * @return array Associative array of string keys to OOUI\FieldLayout instances
4244          */
4245         public function getCheckboxesWidget( &$tabindex, $checked ) {
4246                 $checkboxes = [];
4247                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4248
4249                 foreach ( $checkboxesDef as $name => $options ) {
4250                         $legacyName = $options['legacy-name'] ?? $name;
4251
4252                         $title = null;
4253                         $accesskey = null;
4254                         if ( isset( $options['tooltip'] ) ) {
4255                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4256                                 $title = Linker::titleAttrib( $options['tooltip'] );
4257                         }
4258                         if ( isset( $options['title-message'] ) ) {
4259                                 $title = $this->context->msg( $options['title-message'] )->text();
4260                         }
4261
4262                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4263                                 new OOUI\CheckboxInputWidget( [
4264                                         'tabIndex' => ++$tabindex,
4265                                         'accessKey' => $accesskey,
4266                                         'id' => $options['id'] . 'Widget',
4267                                         'inputId' => $options['id'],
4268                                         'name' => $name,
4269                                         'selected' => $options['default'],
4270                                         'infusable' => true,
4271                                 ] ),
4272                                 [
4273                                         'align' => 'inline',
4274                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4275                                         'title' => $title,
4276                                         'id' => $options['label-id'] ?? null,
4277                                 ]
4278                         );
4279                 }
4280
4281                 return $checkboxes;
4282         }
4283
4284         /**
4285          * Get the message key of the label for the button to save the page
4286          *
4287          * @since 1.30
4288          * @return string
4289          */
4290         protected function getSubmitButtonLabel() {
4291                 $labelAsPublish =
4292                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4293
4294                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4295                 $newPage = !$this->mTitle->exists();
4296
4297                 if ( $labelAsPublish ) {
4298                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4299                 } else {
4300                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4301                 }
4302
4303                 return $buttonLabelKey;
4304         }
4305
4306         /**
4307          * Returns an array of html code of the following buttons:
4308          * save, diff and preview
4309          *
4310          * @param int &$tabindex Current tabindex
4311          *
4312          * @return array
4313          */
4314         public function getEditButtons( &$tabindex ) {
4315                 $buttons = [];
4316
4317                 $labelAsPublish =
4318                         $this->context->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4319
4320                 $buttonLabel = $this->context->msg( $this->getSubmitButtonLabel() )->text();
4321                 $buttonTooltip = $labelAsPublish ? 'publish' : 'save';
4322
4323                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4324                         'name' => 'wpSave',
4325                         'tabIndex' => ++$tabindex,
4326                         'id' => 'wpSaveWidget',
4327                         'inputId' => 'wpSave',
4328                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4329                         'useInputTag' => true,
4330                         'flags' => [ 'progressive', 'primary' ],
4331                         'label' => $buttonLabel,
4332                         'infusable' => true,
4333                         'type' => 'submit',
4334                         // Messages used: tooltip-save, tooltip-publish
4335                         'title' => Linker::titleAttrib( $buttonTooltip ),
4336                         // Messages used: accesskey-save, accesskey-publish
4337                         'accessKey' => Linker::accesskey( $buttonTooltip ),
4338                 ] );
4339
4340                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4341                         'name' => 'wpPreview',
4342                         'tabIndex' => ++$tabindex,
4343                         'id' => 'wpPreviewWidget',
4344                         'inputId' => 'wpPreview',
4345                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4346                         'useInputTag' => true,
4347                         'label' => $this->context->msg( 'showpreview' )->text(),
4348                         'infusable' => true,
4349                         'type' => 'submit',
4350                         // Message used: tooltip-preview
4351                         'title' => Linker::titleAttrib( 'preview' ),
4352                         // Message used: accesskey-preview
4353                         'accessKey' => Linker::accesskey( 'preview' ),
4354                 ] );
4355
4356                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4357                         'name' => 'wpDiff',
4358                         'tabIndex' => ++$tabindex,
4359                         'id' => 'wpDiffWidget',
4360                         'inputId' => 'wpDiff',
4361                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4362                         'useInputTag' => true,
4363                         'label' => $this->context->msg( 'showdiff' )->text(),
4364                         'infusable' => true,
4365                         'type' => 'submit',
4366                         // Message used: tooltip-diff
4367                         'title' => Linker::titleAttrib( 'diff' ),
4368                         // Message used: accesskey-diff
4369                         'accessKey' => Linker::accesskey( 'diff' ),
4370                 ] );
4371
4372                 // Avoid PHP 7.1 warning of passing $this by reference
4373                 $editPage = $this;
4374                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4375
4376                 return $buttons;
4377         }
4378
4379         /**
4380          * Creates a basic error page which informs the user that
4381          * they have attempted to edit a nonexistent section.
4382          */
4383         public function noSuchSectionPage() {
4384                 $out = $this->context->getOutput();
4385                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4386
4387                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4388
4389                 // Avoid PHP 7.1 warning of passing $this by reference
4390                 $editPage = $this;
4391                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4392                 $out->addHTML( $res );
4393
4394                 $out->returnToMain( false, $this->mTitle );
4395         }
4396
4397         /**
4398          * Show "your edit contains spam" page with your diff and text
4399          *
4400          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4401          */
4402         public function spamPageWithContent( $match = false ) {
4403                 $this->textbox2 = $this->textbox1;
4404
4405                 if ( is_array( $match ) ) {
4406                         $match = $this->context->getLanguage()->listToText( $match );
4407                 }
4408                 $out = $this->context->getOutput();
4409                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4410
4411                 $out->addHTML( '<div id="spamprotected">' );
4412                 $out->addWikiMsg( 'spamprotectiontext' );
4413                 if ( $match ) {
4414                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4415                 }
4416                 $out->addHTML( '</div>' );
4417
4418                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4419                 $this->showDiff();
4420
4421                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4422                 $this->showTextbox2();
4423
4424                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4425         }
4426
4427         /**
4428          * Filter an input field through a Unicode de-armoring process if it
4429          * came from an old browser with known broken Unicode editing issues.
4430          *
4431          * @deprecated since 1.30, does nothing
4432          *
4433          * @param WebRequest $request
4434          * @param string $field
4435          * @return string
4436          */
4437         protected function safeUnicodeInput( $request, $field ) {
4438                 return rtrim( $request->getText( $field ) );
4439         }
4440
4441         /**
4442          * Filter an output field through a Unicode armoring process if it is
4443          * going to an old browser with known broken Unicode editing issues.
4444          *
4445          * @deprecated since 1.30, does nothing
4446          *
4447          * @param string $text
4448          * @return string
4449          */
4450         protected function safeUnicodeOutput( $text ) {
4451                 return $text;
4452         }
4453
4454         /**
4455          * @since 1.29
4456          */
4457         protected function addEditNotices() {
4458                 $out = $this->context->getOutput();
4459                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4460                 if ( count( $editNotices ) ) {
4461                         $out->addHTML( implode( "\n", $editNotices ) );
4462                 } else {
4463                         $msg = $this->context->msg( 'editnotice-notext' );
4464                         if ( !$msg->isDisabled() ) {
4465                                 $out->addHTML(
4466                                         '<div class="mw-editnotice-notext">'
4467                                         . $msg->parseAsBlock()
4468                                         . '</div>'
4469                                 );
4470                         }
4471                 }
4472         }
4473
4474         /**
4475          * @since 1.29
4476          */
4477         protected function addTalkPageText() {
4478                 if ( $this->mTitle->isTalkPage() ) {
4479                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4480                 }
4481         }
4482
4483         /**
4484          * @since 1.29
4485          */
4486         protected function addLongPageWarningHeader() {
4487                 if ( $this->contentLength === false ) {
4488                         $this->contentLength = strlen( $this->textbox1 );
4489                 }
4490
4491                 $out = $this->context->getOutput();
4492                 $lang = $this->context->getLanguage();
4493                 $maxArticleSize = $this->context->getConfig()->get( 'MaxArticleSize' );
4494                 if ( $this->tooBig || $this->contentLength > $maxArticleSize * 1024 ) {
4495                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4496                                 [
4497                                         'longpageerror',
4498                                         $lang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4499                                         $lang->formatNum( $maxArticleSize )
4500                                 ]
4501                         );
4502                 } else {
4503                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4504                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4505                                         [
4506                                                 'longpage-hint',
4507                                                 $lang->formatSize( strlen( $this->textbox1 ) ),
4508                                                 strlen( $this->textbox1 )
4509                                         ]
4510                                 );
4511                         }
4512                 }
4513         }
4514
4515         /**
4516          * @since 1.29
4517          */
4518         protected function addPageProtectionWarningHeaders() {
4519                 $out = $this->context->getOutput();
4520                 if ( $this->mTitle->isProtected( 'edit' ) &&
4521                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4522                 ) {
4523                         # Is the title semi-protected?
4524                         if ( $this->mTitle->isSemiProtected() ) {
4525                                 $noticeMsg = 'semiprotectedpagewarning';
4526                         } else {
4527                                 # Then it must be protected based on static groups (regular)
4528                                 $noticeMsg = 'protectedpagewarning';
4529                         }
4530                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4531                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4532                 }
4533                 if ( $this->mTitle->isCascadeProtected() ) {
4534                         # Is this page under cascading protection from some source pages?
4535                         /** @var Title[] $cascadeSources */
4536                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4537                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4538                         $cascadeSourcesCount = count( $cascadeSources );
4539                         if ( $cascadeSourcesCount > 0 ) {
4540                                 # Explain, and list the titles responsible
4541                                 foreach ( $cascadeSources as $page ) {
4542                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4543                                 }
4544                         }
4545                         $notice .= '</div>';
4546                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4547                 }
4548                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4549                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4550                                 [ 'lim' => 1,
4551                                         'showIfEmpty' => false,
4552                                         'msgKey' => [ 'titleprotectedwarning' ],
4553                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4554                 }
4555         }
4556
4557         /**
4558          * @param OutputPage $out
4559          * @since 1.29
4560          */
4561         protected function addExplainConflictHeader( OutputPage $out ) {
4562                 $out->addHTML(
4563                         $this->getEditConflictHelper()->getExplainHeader()
4564                 );
4565         }
4566
4567         /**
4568          * @param string $name
4569          * @param mixed[] $customAttribs
4570          * @param User $user
4571          * @return mixed[]
4572          * @since 1.29
4573          */
4574         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4575                 return ( new TextboxBuilder() )->buildTextboxAttribs(
4576                         $name, $customAttribs, $user, $this->mTitle
4577                 );
4578         }
4579
4580         /**
4581          * @param string $wikitext
4582          * @return string
4583          * @since 1.29
4584          */
4585         protected function addNewLineAtEnd( $wikitext ) {
4586                 return ( new TextboxBuilder() )->addNewLineAtEnd( $wikitext );
4587         }
4588
4589         /**
4590          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4591          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4592          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4593          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4594          * spread the new style links more efficiently.
4595          *
4596          * @param string $text
4597          * @return string
4598          */
4599         private function guessSectionName( $text ) {
4600                 global $wgParser;
4601
4602                 // Detect Microsoft browsers
4603                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4604                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4605                         // ...and redirect them to legacy encoding, if available
4606                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4607                 }
4608                 // Meanwhile, real browsers get real anchors
4609                 return $wgParser->guessSectionNameFromWikiText( $text );
4610         }
4611
4612         /**
4613          * Set a factory function to create an EditConflictHelper
4614          *
4615          * @param callable $factory Factory function
4616          * @since 1.31
4617          */
4618         public function setEditConflictHelperFactory( callable $factory ) {
4619                 $this->editConflictHelperFactory = $factory;
4620                 $this->editConflictHelper = null;
4621         }
4622
4623         /**
4624          * @return TextConflictHelper
4625          */
4626         private function getEditConflictHelper() {
4627                 if ( !$this->editConflictHelper ) {
4628                         $this->editConflictHelper = call_user_func(
4629                                 $this->editConflictHelperFactory,
4630                                 $this->getSubmitButtonLabel()
4631                         );
4632                 }
4633
4634                 return $this->editConflictHelper;
4635         }
4636
4637         /**
4638          * @param string $submitButtonLabel
4639          * @return TextConflictHelper
4640          */
4641         private function newTextConflictHelper( $submitButtonLabel ) {
4642                 return new TextConflictHelper(
4643                         $this->getTitle(),
4644                         $this->getContext()->getOutput(),
4645                         MediaWikiServices::getInstance()->getStatsdDataFactory(),
4646                         $submitButtonLabel
4647                 );
4648         }
4649 }