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