includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\Logger\LoggerFactory;
  24 use MediaWiki\MediaWikiServices;
  25 use Wikimedia\ScopedCallback;
  26
  27 /**
  28  * The edit page/HTML interface (split from Article)
  29  * The actual database and text munging is still in Article,
  30  * but it should get easier to call those from alternate
  31  * interfaces.
  32  *
  33  * EditPage cares about two distinct titles:
  34  * $this->mContextTitle is the page that forms submit to, links point to,
  35  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  36  * page in the database that is actually being edited. These are
  37  * usually the same, but they are now allowed to be different.
  38  *
  39  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  40  * headaches, which may be fatal.
  41  */
  42 class EditPage {
  43         /**
  44          * Status: Article successfully updated
  45          */
  46         const AS_SUCCESS_UPDATE = 200;
  47
  48         /**
  49          * Status: Article successfully created
  50          */
  51         const AS_SUCCESS_NEW_ARTICLE = 201;
  52
  53         /**
  54          * Status: Article update aborted by a hook function
  55          */
  56         const AS_HOOK_ERROR = 210;
  57
  58         /**
  59          * Status: A hook function returned an error
  60          */
  61         const AS_HOOK_ERROR_EXPECTED = 212;
  62
  63         /**
  64          * Status: User is blocked from editing this page
  65          */
  66         const AS_BLOCKED_PAGE_FOR_USER = 215;
  67
  68         /**
  69          * Status: Content too big (> $wgMaxArticleSize)
  70          */
  71         const AS_CONTENT_TOO_BIG = 216;
  72
  73         /**
  74          * Status: this anonymous user is not allowed to edit this page
  75          */
  76         const AS_READ_ONLY_PAGE_ANON = 218;
  77
  78         /**
  79          * Status: this logged in user is not allowed to edit this page
  80          */
  81         const AS_READ_ONLY_PAGE_LOGGED = 219;
  82
  83         /**
  84          * Status: wiki is in readonly mode (wfReadOnly() == true)
  85          */
  86         const AS_READ_ONLY_PAGE = 220;
  87
  88         /**
  89          * Status: rate limiter for action 'edit' was tripped
  90          */
  91         const AS_RATE_LIMITED = 221;
  92
  93         /**
  94          * Status: article was deleted while editing and param wpRecreate == false or form
  95          * was not posted
  96          */
  97         const AS_ARTICLE_WAS_DELETED = 222;
  98
  99         /**
 100          * Status: user tried to create this page, but is not allowed to do that
 101          * ( Title->userCan('create') == false )
 102          */
 103         const AS_NO_CREATE_PERMISSION = 223;
 104
 105         /**
 106          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 107          */
 108         const AS_BLANK_ARTICLE = 224;
 109
 110         /**
 111          * Status: (non-resolvable) edit conflict
 112          */
 113         const AS_CONFLICT_DETECTED = 225;
 114
 115         /**
 116          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 117          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 118          */
 119         const AS_SUMMARY_NEEDED = 226;
 120
 121         /**
 122          * Status: user tried to create a new section without content
 123          */
 124         const AS_TEXTBOX_EMPTY = 228;
 125
 126         /**
 127          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 128          */
 129         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 130
 131         /**
 132          * Status: WikiPage::doEdit() was unsuccessful
 133          */
 134         const AS_END = 231;
 135
 136         /**
 137          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 138          */
 139         const AS_SPAM_ERROR = 232;
 140
 141         /**
 142          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 143          */
 144         const AS_IMAGE_REDIRECT_ANON = 233;
 145
 146         /**
 147          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 148          */
 149         const AS_IMAGE_REDIRECT_LOGGED = 234;
 150
 151         /**
 152          * Status: user tried to modify the content model, but is not allowed to do that
 153          * ( User::isAllowed('editcontentmodel') == false )
 154          */
 155         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 156
 157         /**
 158          * Status: user tried to create self-redirect (redirect to the same article) and
 159          * wpIgnoreSelfRedirect == false
 160          */
 161         const AS_SELF_REDIRECT = 236;
 162
 163         /**
 164          * Status: an error relating to change tagging. Look at the message key for
 165          * more details
 166          */
 167         const AS_CHANGE_TAG_ERROR = 237;
 168
 169         /**
 170          * Status: can't parse content
 171          */
 172         const AS_PARSE_ERROR = 240;
 173
 174         /**
 175          * Status: when changing the content model is disallowed due to
 176          * $wgContentHandlerUseDB being false
 177          */
 178         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 179
 180         /**
 181          * HTML id and name for the beginning of the edit form.
 182          */
 183         const EDITFORM_ID = 'editform';
 184
 185         /**
 186          * Prefix of key for cookie used to pass post-edit state.
 187          * The revision id edited is added after this
 188          */
 189         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 190
 191         /**
 192          * Duration of PostEdit cookie, in seconds.
 193          * The cookie will be removed instantly if the JavaScript runs.
 194          *
 195          * Otherwise, though, we don't want the cookies to accumulate.
 196          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 197          * limit of only 20 cookies per domain. This still applies at least to some
 198          * versions of IE without full updates:
 199          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 200          *
 201          * A value of 20 minutes should be enough to take into account slow loads and minor
 202          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 203          */
 204         const POST_EDIT_COOKIE_DURATION = 1200;
 205
 206         /** @var Article */
 207         public $mArticle;
 208         /** @var WikiPage */
 209         private $page;
 210
 211         /** @var Title */
 212         public $mTitle;
 213
 214         /** @var null|Title */
 215         private $mContextTitle = null;
 216
 217         /** @var string */
 218         public $action = 'submit';
 219
 220         /** @var bool */
 221         public $isConflict = false;
 222
 223         /** @var bool */
 224         public $isCssJsSubpage = false;
 225
 226         /** @var bool */
 227         public $isCssSubpage = false;
 228
 229         /** @var bool */
 230         public $isJsSubpage = false;
 231
 232         /** @var bool */
 233         public $isWrongCaseCssJsPage = false;
 234
 235         /** @var bool New page or new section */
 236         public $isNew = false;
 237
 238         /** @var bool */
 239         public $deletedSinceEdit;
 240
 241         /** @var string */
 242         public $formtype;
 243
 244         /** @var bool */
 245         public $firsttime;
 246
 247         /** @var bool|stdClass */
 248         public $lastDelete;
 249
 250         /** @var bool */
 251         public $mTokenOk = false;
 252
 253         /** @var bool */
 254         public $mTokenOkExceptSuffix = false;
 255
 256         /** @var bool */
 257         public $mTriedSave = false;
 258
 259         /** @var bool */
 260         public $incompleteForm = false;
 261
 262         /** @var bool */
 263         public $tooBig = false;
 264
 265         /** @var bool */
 266         public $missingComment = false;
 267
 268         /** @var bool */
 269         public $missingSummary = false;
 270
 271         /** @var bool */
 272         public $allowBlankSummary = false;
 273
 274         /** @var bool */
 275         protected $blankArticle = false;
 276
 277         /** @var bool */
 278         protected $allowBlankArticle = false;
 279
 280         /** @var bool */
 281         protected $selfRedirect = false;
 282
 283         /** @var bool */
 284         protected $allowSelfRedirect = false;
 285
 286         /** @var string */
 287         public $autoSumm = '';
 288
 289         /** @var string */
 290         public $hookError = '';
 291
 292         /** @var ParserOutput */
 293         public $mParserOutput;
 294
 295         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 296         public $hasPresetSummary = false;
 297
 298         /** @var Revision|bool */
 299         public $mBaseRevision = false;
 300
 301         /** @var bool */
 302         public $mShowSummaryField = true;
 303
 304         # Form values
 305
 306         /** @var bool */
 307         public $save = false;
 308
 309         /** @var bool */
 310         public $preview = false;
 311
 312         /** @var bool */
 313         public $diff = false;
 314
 315         /** @var bool */
 316         public $minoredit = false;
 317
 318         /** @var bool */
 319         public $watchthis = false;
 320
 321         /** @var bool */
 322         public $recreate = false;
 323
 324         /** @var string */
 325         public $textbox1 = '';
 326
 327         /** @var string */
 328         public $textbox2 = '';
 329
 330         /** @var string */
 331         public $summary = '';
 332
 333         /** @var bool */
 334         public $nosummary = false;
 335
 336         /** @var string */
 337         public $edittime = '';
 338
 339         /** @var integer */
 340         private $editRevId = null;
 341
 342         /** @var string */
 343         public $section = '';
 344
 345         /** @var string */
 346         public $sectiontitle = '';
 347
 348         /** @var string */
 349         public $starttime = '';
 350
 351         /** @var int */
 352         public $oldid = 0;
 353
 354         /** @var int */
 355         public $parentRevId = 0;
 356
 357         /** @var string */
 358         public $editintro = '';
 359
 360         /** @var null */
 361         public $scrolltop = null;
 362
 363         /** @var bool */
 364         public $bot = true;
 365
 366         /** @var string */
 367         public $contentModel;
 368
 369         /** @var null|string */
 370         public $contentFormat = null;
 371
 372         /** @var null|array */
 373         private $changeTags = null;
 374
 375         # Placeholders for text injection by hooks (must be HTML)
 376         # extensions should take care to _append_ to the present value
 377
 378         /** @var string Before even the preview */
 379         public $editFormPageTop = '';
 380         public $editFormTextTop = '';
 381         public $editFormTextBeforeContent = '';
 382         public $editFormTextAfterWarn = '';
 383         public $editFormTextAfterTools = '';
 384         public $editFormTextBottom = '';
 385         public $editFormTextAfterContent = '';
 386         public $previewTextAfterContent = '';
 387         public $mPreloadContent = null;
 388
 389         /* $didSave should be set to true whenever an article was successfully altered. */
 390         public $didSave = false;
 391         public $undidRev = 0;
 392
 393         public $suppressIntro = false;
 394
 395         /** @var bool */
 396         protected $edit;
 397
 398         /** @var bool|int */
 399         protected $contentLength = false;
 400
 401         /**
 402          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 403          */
 404         private $enableApiEditOverride = false;
 405
 406         /**
 407          * @var IContextSource
 408          */
 409         protected $context;
 410
 411         /**
 412          * @var bool Whether an old revision is edited
 413          */
 414         private $isOldRev = false;
 415
 416         /**
 417          * @param Article $article
 418          */
 419         public function __construct( Article $article ) {
 420                 $this->mArticle = $article;
 421                 $this->page = $article->getPage(); // model object
 422                 $this->mTitle = $article->getTitle();
 423                 $this->context = $article->getContext();
 424
 425                 $this->contentModel = $this->mTitle->getContentModel();
 426
 427                 $handler = ContentHandler::getForModelID( $this->contentModel );
 428                 $this->contentFormat = $handler->getDefaultFormat();
 429         }
 430
 431         /**
 432          * @return Article
 433          */
 434         public function getArticle() {
 435                 return $this->mArticle;
 436         }
 437
 438         /**
 439          * @since 1.28
 440          * @return IContextSource
 441          */
 442         public function getContext() {
 443                 return $this->context;
 444         }
 445
 446         /**
 447          * @since 1.19
 448          * @return Title
 449          */
 450         public function getTitle() {
 451                 return $this->mTitle;
 452         }
 453
 454         /**
 455          * Set the context Title object
 456          *
 457          * @param Title|null $title Title object or null
 458          */
 459         public function setContextTitle( $title ) {
 460                 $this->mContextTitle = $title;
 461         }
 462
 463         /**
 464          * Get the context title object.
 465          * If not set, $wgTitle will be returned. This behavior might change in
 466          * the future to return $this->mTitle instead.
 467          *
 468          * @return Title
 469          */
 470         public function getContextTitle() {
 471                 if ( is_null( $this->mContextTitle ) ) {
 472                         global $wgTitle;
 473                         return $wgTitle;
 474                 } else {
 475                         return $this->mContextTitle;
 476                 }
 477         }
 478
 479         /**
 480          * Returns if the given content model is editable.
 481          *
 482          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 483          * @return bool
 484          * @throws MWException If $modelId has no known handler
 485          */
 486         public function isSupportedContentModel( $modelId ) {
 487                 return $this->enableApiEditOverride === true ||
 488                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 489         }
 490
 491         /**
 492          * Allow editing of content that supports API direct editing, but not general
 493          * direct editing. Set to false by default.
 494          *
 495          * @param bool $enableOverride
 496          */
 497         public function setApiEditOverride( $enableOverride ) {
 498                 $this->enableApiEditOverride = $enableOverride;
 499         }
 500
 501         /**
 502          * @deprecated since 1.29, call edit directly
 503          */
 504         public function submit() {
 505                 $this->edit();
 506         }
 507
 508         /**
 509          * This is the function that gets called for "action=edit". It
 510          * sets up various member variables, then passes execution to
 511          * another function, usually showEditForm()
 512          *
 513          * The edit form is self-submitting, so that when things like
 514          * preview and edit conflicts occur, we get the same form back
 515          * with the extra stuff added.  Only when the final submission
 516          * is made and all is well do we actually save and redirect to
 517          * the newly-edited page.
 518          */
 519         public function edit() {
 520                 global $wgOut, $wgRequest, $wgUser;
 521                 // Allow extensions to modify/prevent this form or submission
 522                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 523                         return;
 524                 }
 525
 526                 wfDebug( __METHOD__ . ": enter\n" );
 527
 528                 // If they used redlink=1 and the page exists, redirect to the main article
 529                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 530                         $wgOut->redirect( $this->mTitle->getFullURL() );
 531                         return;
 532                 }
 533
 534                 $this->importFormData( $wgRequest );
 535                 $this->firsttime = false;
 536
 537                 if ( wfReadOnly() && $this->save ) {
 538                         // Force preview
 539                         $this->save = false;
 540                         $this->preview = true;
 541                 }
 542
 543                 if ( $this->save ) {
 544                         $this->formtype = 'save';
 545                 } elseif ( $this->preview ) {
 546                         $this->formtype = 'preview';
 547                 } elseif ( $this->diff ) {
 548                         $this->formtype = 'diff';
 549                 } else { # First time through
 550                         $this->firsttime = true;
 551                         if ( $this->previewOnOpen() ) {
 552                                 $this->formtype = 'preview';
 553                         } else {
 554                                 $this->formtype = 'initial';
 555                         }
 556                 }
 557
 558                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 559                 if ( $permErrors ) {
 560                         wfDebug( __METHOD__ . ": User can't edit\n" );
 561                         // Auto-block user's IP if the account was "hard" blocked
 562                         if ( !wfReadOnly() ) {
 563                                 $user = $wgUser;
 564                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 565                                         $user->spreadAnyEditBlock();
 566                                 } );
 567                         }
 568                         $this->displayPermissionsError( $permErrors );
 569
 570                         return;
 571                 }
 572
 573                 $revision = $this->mArticle->getRevisionFetched();
 574                 // Disallow editing revisions with content models different from the current one
 575                 // Undo edits being an exception in order to allow reverting content model changes.
 576                 if ( $revision
 577                         && $revision->getContentModel() !== $this->contentModel
 578                 ) {
 579                         $prevRev = null;
 580                         if ( $this->undidRev ) {
 581                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 582                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 583                         }
 584                         if ( !$this->undidRev
 585                                 || !$prevRev
 586                                 || $prevRev->getContentModel() !== $this->contentModel
 587                         ) {
 588                                 $this->displayViewSourcePage(
 589                                         $this->getContentObject(),
 590                                         $this->context->msg(
 591                                                 'contentmodelediterror',
 592                                                 $revision->getContentModel(),
 593                                                 $this->contentModel
 594                                         )->plain()
 595                                 );
 596                                 return;
 597                         }
 598                 }
 599
 600                 $this->isConflict = false;
 601                 // css / js subpages of user pages get a special treatment
 602                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 603                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 604                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 605                 // @todo FIXME: Silly assignment.
 606                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 607
 608                 # Show applicable editing introductions
 609                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 610                         $this->showIntro();
 611                 }
 612
 613                 # Attempt submission here.  This will check for edit conflicts,
 614                 # and redundantly check for locked database, blocked IPs, etc.
 615                 # that edit() already checked just in case someone tries to sneak
 616                 # in the back door with a hand-edited submission URL.
 617
 618                 if ( 'save' == $this->formtype ) {
 619                         $resultDetails = null;
 620                         $status = $this->attemptSave( $resultDetails );
 621                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 622                                 return;
 623                         }
 624                 }
 625
 626                 # First time through: get contents, set time for conflict
 627                 # checking, etc.
 628                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 629                         if ( $this->initialiseForm() === false ) {
 630                                 $this->noSuchSectionPage();
 631                                 return;
 632                         }
 633
 634                         if ( !$this->mTitle->getArticleID() ) {
 635                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 636                         } else {
 637                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 638                         }
 639
 640                 }
 641
 642                 $this->showEditForm();
 643         }
 644
 645         /**
 646          * @param string $rigor Same format as Title::getUserPermissionErrors()
 647          * @return array
 648          */
 649         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 650                 global $wgUser;
 651
 652                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 653                 # Can this title be created?
 654                 if ( !$this->mTitle->exists() ) {
 655                         $permErrors = array_merge(
 656                                 $permErrors,
 657                                 wfArrayDiff2(
 658                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 659                                         $permErrors
 660                                 )
 661                         );
 662                 }
 663                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 664                 $remove = [];
 665                 foreach ( $permErrors as $error ) {
 666                         if ( ( $this->preview || $this->diff )
 667                                 && (
 668                                         $error[0] == 'blockedtext' ||
 669                                         $error[0] == 'autoblockedtext' ||
 670                                         $error[0] == 'systemblockedtext'
 671                                 )
 672                         ) {
 673                                 $remove[] = $error;
 674                         }
 675                 }
 676                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 677
 678                 return $permErrors;
 679         }
 680
 681         /**
 682          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 683          * but with the following differences:
 684          * - If redlink=1, the user will be redirected to the page
 685          * - If there is content to display or the error occurs while either saving,
 686          *   previewing or showing the difference, it will be a
 687          *   "View source for ..." page displaying the source code after the error message.
 688          *
 689          * @since 1.19
 690          * @param array $permErrors Array of permissions errors, as returned by
 691          *    Title::getUserPermissionsErrors().
 692          * @throws PermissionsError
 693          */
 694         protected function displayPermissionsError( array $permErrors ) {
 695                 global $wgRequest, $wgOut;
 696
 697                 if ( $wgRequest->getBool( 'redlink' ) ) {
 698                         // The edit page was reached via a red link.
 699                         // Redirect to the article page and let them click the edit tab if
 700                         // they really want a permission error.
 701                         $wgOut->redirect( $this->mTitle->getFullURL() );
 702                         return;
 703                 }
 704
 705                 $content = $this->getContentObject();
 706
 707                 # Use the normal message if there's nothing to display
 708                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 709                         $action = $this->mTitle->exists() ? 'edit' :
 710                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 711                         throw new PermissionsError( $action, $permErrors );
 712                 }
 713
 714                 $this->displayViewSourcePage(
 715                         $content,
 716                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 717                 );
 718         }
 719
 720         /**
 721          * Display a read-only View Source page
 722          * @param Content $content content object
 723          * @param string $errorMessage additional wikitext error message to display
 724          */
 725         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 726                 global $wgOut;
 727
 728                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 729
 730                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 731                 $wgOut->setPageTitle( $this->context->msg(
 732                         'viewsource-title',
 733                         $this->getContextTitle()->getPrefixedText()
 734                 ) );
 735                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 736                 $wgOut->addHTML( $this->editFormPageTop );
 737                 $wgOut->addHTML( $this->editFormTextTop );
 738
 739                 if ( $errorMessage !== '' ) {
 740                         $wgOut->addWikiText( $errorMessage );
 741                         $wgOut->addHTML( "<hr />\n" );
 742                 }
 743
 744                 # If the user made changes, preserve them when showing the markup
 745                 # (This happens when a user is blocked during edit, for instance)
 746                 if ( !$this->firsttime ) {
 747                         $text = $this->textbox1;
 748                         $wgOut->addWikiMsg( 'viewyourtext' );
 749                 } else {
 750                         try {
 751                                 $text = $this->toEditText( $content );
 752                         } catch ( MWException $e ) {
 753                                 # Serialize using the default format if the content model is not supported
 754                                 # (e.g. for an old revision with a different model)
 755                                 $text = $content->serialize();
 756                         }
 757                         $wgOut->addWikiMsg( 'viewsourcetext' );
 758                 }
 759
 760                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 761                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 762                 $wgOut->addHTML( $this->editFormTextAfterContent );
 763
 764                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 765
 766                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 767
 768                 $wgOut->addHTML( $this->editFormTextBottom );
 769                 if ( $this->mTitle->exists() ) {
 770                         $wgOut->returnToMain( null, $this->mTitle );
 771                 }
 772         }
 773
 774         /**
 775          * Should we show a preview when the edit form is first shown?
 776          *
 777          * @return bool
 778          */
 779         protected function previewOnOpen() {
 780                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 781                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 782                         // Explicit override from request
 783                         return true;
 784                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 785                         // Explicit override from request
 786                         return false;
 787                 } elseif ( $this->section == 'new' ) {
 788                         // Nothing *to* preview for new sections
 789                         return false;
 790                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 791                         && $wgUser->getOption( 'previewonfirst' )
 792                 ) {
 793                         // Standard preference behavior
 794                         return true;
 795                 } elseif ( !$this->mTitle->exists()
 796                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 797                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 798                 ) {
 799                         // Categories are special
 800                         return true;
 801                 } else {
 802                         return false;
 803                 }
 804         }
 805
 806         /**
 807          * Checks whether the user entered a skin name in uppercase,
 808          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 809          *
 810          * @return bool
 811          */
 812         protected function isWrongCaseCssJsPage() {
 813                 if ( $this->mTitle->isCssJsSubpage() ) {
 814                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 815                         $skins = array_merge(
 816                                 array_keys( Skin::getSkinNames() ),
 817                                 [ 'common' ]
 818                         );
 819                         return !in_array( $name, $skins )
 820                                 && in_array( strtolower( $name ), $skins );
 821                 } else {
 822                         return false;
 823                 }
 824         }
 825
 826         /**
 827          * Returns whether section editing is supported for the current page.
 828          * Subclasses may override this to replace the default behavior, which is
 829          * to check ContentHandler::supportsSections.
 830          *
 831          * @return bool True if this edit page supports sections, false otherwise.
 832          */
 833         protected function isSectionEditSupported() {
 834                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 835                 return $contentHandler->supportsSections();
 836         }
 837
 838         /**
 839          * This function collects the form data and uses it to populate various member variables.
 840          * @param WebRequest $request
 841          * @throws ErrorPageError
 842          */
 843         public function importFormData( &$request ) {
 844                 global $wgContLang, $wgUser;
 845
 846                 # Section edit can come from either the form or a link
 847                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 848
 849                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 850                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 851                 }
 852
 853                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 854
 855                 if ( $request->wasPosted() ) {
 856                         # These fields need to be checked for encoding.
 857                         # Also remove trailing whitespace, but don't remove _initial_
 858                         # whitespace from the text boxes. This may be significant formatting.
 859                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 860                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 861                                 // Skip this if wpTextbox2 has input, it indicates that we came
 862                                 // from a conflict page with raw page text, not a custom form
 863                                 // modified by subclasses
 864                                 $textbox1 = $this->importContentFormData( $request );
 865                                 if ( $textbox1 !== null ) {
 866                                         $this->textbox1 = $textbox1;
 867                                 }
 868                         }
 869
 870                         # Truncate for whole multibyte characters
 871                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 872
 873                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 874                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 875                         # section titles.
 876                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 877
 878                         # Treat sectiontitle the same way as summary.
 879                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 880                         # currently doing double duty as both edit summary and section title. Right now this
 881                         # is just to allow API edits to work around this limitation, but this should be
 882                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 883                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 884                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 885
 886                         $this->edittime = $request->getVal( 'wpEdittime' );
 887                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 888                         $this->starttime = $request->getVal( 'wpStarttime' );
 889
 890                         $undidRev = $request->getInt( 'wpUndidRevision' );
 891                         if ( $undidRev ) {
 892                                 $this->undidRev = $undidRev;
 893                         }
 894
 895                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 896
 897                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 898                                 // wpTextbox1 field is missing, possibly due to being "too big"
 899                                 // according to some filter rules such as Suhosin's setting for
 900                                 // suhosin.request.max_value_length (d'oh)
 901                                 $this->incompleteForm = true;
 902                         } else {
 903                                 // If we receive the last parameter of the request, we can fairly
 904                                 // claim the POST request has not been truncated.
 905
 906                                 // TODO: softened the check for cutover.  Once we determine
 907                                 // that it is safe, we should complete the transition by
 908                                 // removing the "edittime" clause.
 909                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 910                                         && is_null( $this->edittime ) );
 911                         }
 912                         if ( $this->incompleteForm ) {
 913                                 # If the form is incomplete, force to preview.
 914                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 915                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 916                                 $this->preview = true;
 917                         } else {
 918                                 $this->preview = $request->getCheck( 'wpPreview' );
 919                                 $this->diff = $request->getCheck( 'wpDiff' );
 920
 921                                 // Remember whether a save was requested, so we can indicate
 922                                 // if we forced preview due to session failure.
 923                                 $this->mTriedSave = !$this->preview;
 924
 925                                 if ( $this->tokenOk( $request ) ) {
 926                                         # Some browsers will not report any submit button
 927                                         # if the user hits enter in the comment box.
 928                                         # The unmarked state will be assumed to be a save,
 929                                         # if the form seems otherwise complete.
 930                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 931                                 } elseif ( $this->diff ) {
 932                                         # Failed token check, but only requested "Show Changes".
 933                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 934                                 } else {
 935                                         # Page might be a hack attempt posted from
 936                                         # an external site. Preview instead of saving.
 937                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 938                                         $this->preview = true;
 939                                 }
 940                         }
 941                         $this->save = !$this->preview && !$this->diff;
 942                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 943                                 $this->edittime = null;
 944                         }
 945
 946                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 947                                 $this->starttime = null;
 948                         }
 949
 950                         $this->recreate = $request->getCheck( 'wpRecreate' );
 951
 952                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 953                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 954
 955                         # Don't force edit summaries when a user is editing their own user or talk page
 956                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 957                                 && $this->mTitle->getText() == $wgUser->getName()
 958                         ) {
 959                                 $this->allowBlankSummary = true;
 960                         } else {
 961                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 962                                         || !$wgUser->getOption( 'forceeditsummary' );
 963                         }
 964
 965                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 966
 967                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 968                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 969
 970                         $changeTags = $request->getVal( 'wpChangeTags' );
 971                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 972                                 $this->changeTags = [];
 973                         } else {
 974                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 975                                         $changeTags ) ) );
 976                         }
 977                 } else {
 978                         # Not a posted form? Start with nothing.
 979                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 980                         $this->textbox1 = '';
 981                         $this->summary = '';
 982                         $this->sectiontitle = '';
 983                         $this->edittime = '';
 984                         $this->editRevId = null;
 985                         $this->starttime = wfTimestampNow();
 986                         $this->edit = false;
 987                         $this->preview = false;
 988                         $this->save = false;
 989                         $this->diff = false;
 990                         $this->minoredit = false;
 991                         // Watch may be overridden by request parameters
 992                         $this->watchthis = $request->getBool( 'watchthis', false );
 993                         $this->recreate = false;
 994
 995                         // When creating a new section, we can preload a section title by passing it as the
 996                         // preloadtitle parameter in the URL (T15100)
 997                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 998                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 999                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1000                                 $this->summary = $request->getVal( 'preloadtitle' );
1001                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1002                                 $this->summary = $request->getText( 'summary' );
1003                                 if ( $this->summary !== '' ) {
1004                                         $this->hasPresetSummary = true;
1005                                 }
1006                         }
1007
1008                         if ( $request->getVal( 'minor' ) ) {
1009                                 $this->minoredit = true;
1010                         }
1011                 }
1012
1013                 $this->oldid = $request->getInt( 'oldid' );
1014                 $this->parentRevId = $request->getInt( 'parentRevId' );
1015
1016                 $this->bot = $request->getBool( 'bot', true );
1017                 $this->nosummary = $request->getBool( 'nosummary' );
1018
1019                 // May be overridden by revision.
1020                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1021                 // May be overridden by revision.
1022                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1023
1024                 try {
1025                         $handler = ContentHandler::getForModelID( $this->contentModel );
1026                 } catch ( MWUnknownContentModelException $e ) {
1027                         throw new ErrorPageError(
1028                                 'editpage-invalidcontentmodel-title',
1029                                 'editpage-invalidcontentmodel-text',
1030                                 [ wfEscapeWikiText( $this->contentModel ) ]
1031                         );
1032                 }
1033
1034                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1035                         throw new ErrorPageError(
1036                                 'editpage-notsupportedcontentformat-title',
1037                                 'editpage-notsupportedcontentformat-text',
1038                                 [
1039                                         wfEscapeWikiText( $this->contentFormat ),
1040                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1041                                 ]
1042                         );
1043                 }
1044
1045                 /**
1046                  * @todo Check if the desired model is allowed in this namespace, and if
1047                  *   a transition from the page's current model to the new model is
1048                  *   allowed.
1049                  */
1050
1051                 $this->editintro = $request->getText( 'editintro',
1052                         // Custom edit intro for new sections
1053                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1054
1055                 // Allow extensions to modify form data
1056                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1057         }
1058
1059         /**
1060          * Subpage overridable method for extracting the page content data from the
1061          * posted form to be placed in $this->textbox1, if using customized input
1062          * this method should be overridden and return the page text that will be used
1063          * for saving, preview parsing and so on...
1064          *
1065          * @param WebRequest $request
1066          * @return string|null
1067          */
1068         protected function importContentFormData( &$request ) {
1069                 return; // Don't do anything, EditPage already extracted wpTextbox1
1070         }
1071
1072         /**
1073          * Initialise form fields in the object
1074          * Called on the first invocation, e.g. when a user clicks an edit link
1075          * @return bool If the requested section is valid
1076          */
1077         public function initialiseForm() {
1078                 global $wgUser;
1079                 $this->edittime = $this->page->getTimestamp();
1080                 $this->editRevId = $this->page->getLatest();
1081
1082                 $content = $this->getContentObject( false ); # TODO: track content object?!
1083                 if ( $content === false ) {
1084                         return false;
1085                 }
1086                 $this->textbox1 = $this->toEditText( $content );
1087
1088                 // activate checkboxes if user wants them to be always active
1089                 # Sort out the "watch" checkbox
1090                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1091                         # Watch all edits
1092                         $this->watchthis = true;
1093                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1094                         # Watch creations
1095                         $this->watchthis = true;
1096                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1097                         # Already watched
1098                         $this->watchthis = true;
1099                 }
1100                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1101                         $this->minoredit = true;
1102                 }
1103                 if ( $this->textbox1 === false ) {
1104                         return false;
1105                 }
1106                 return true;
1107         }
1108
1109         /**
1110          * @param Content|null $def_content The default value to return
1111          *
1112          * @return Content|null Content on success, $def_content for invalid sections
1113          *
1114          * @since 1.21
1115          */
1116         protected function getContentObject( $def_content = null ) {
1117                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1118
1119                 $content = false;
1120
1121                 // For message page not locally set, use the i18n message.
1122                 // For other non-existent articles, use preload text if any.
1123                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1124                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1125                                 # If this is a system message, get the default text.
1126                                 $msg = $this->mTitle->getDefaultMessageText();
1127
1128                                 $content = $this->toEditContent( $msg );
1129                         }
1130                         if ( $content === false ) {
1131                                 # If requested, preload some text.
1132                                 $preload = $wgRequest->getVal( 'preload',
1133                                         // Custom preload text for new sections
1134                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1135                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1136
1137                                 $content = $this->getPreloadedContent( $preload, $params );
1138                         }
1139                 // For existing pages, get text based on "undo" or section parameters.
1140                 } else {
1141                         if ( $this->section != '' ) {
1142                                 // Get section edit text (returns $def_text for invalid sections)
1143                                 $orig = $this->getOriginalContent( $wgUser );
1144                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1145
1146                                 if ( !$content ) {
1147                                         $content = $def_content;
1148                                 }
1149                         } else {
1150                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1151                                 $undo = $wgRequest->getInt( 'undo' );
1152
1153                                 if ( $undo > 0 && $undoafter > 0 ) {
1154                                         $undorev = Revision::newFromId( $undo );
1155                                         $oldrev = Revision::newFromId( $undoafter );
1156
1157                                         # Sanity check, make sure it's the right page,
1158                                         # the revisions exist and they were not deleted.
1159                                         # Otherwise, $content will be left as-is.
1160                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1161                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1162                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1163                                         ) {
1164                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1165
1166                                                 if ( $content === false ) {
1167                                                         # Warn the user that something went wrong
1168                                                         $undoMsg = 'failure';
1169                                                 } else {
1170                                                         $oldContent = $this->page->getContent( Revision::RAW );
1171                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1172                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1173                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1174                                                                 // The undo may change content
1175                                                                 // model if its reverting the top
1176                                                                 // edit. This can result in
1177                                                                 // mismatched content model/format.
1178                                                                 $this->contentModel = $newContent->getModel();
1179                                                                 $this->contentFormat = $oldrev->getContentFormat();
1180                                                         }
1181
1182                                                         if ( $newContent->equals( $oldContent ) ) {
1183                                                                 # Tell the user that the undo results in no change,
1184                                                                 # i.e. the revisions were already undone.
1185                                                                 $undoMsg = 'nochange';
1186                                                                 $content = false;
1187                                                         } else {
1188                                                                 # Inform the user of our success and set an automatic edit summary
1189                                                                 $undoMsg = 'success';
1190
1191                                                                 # If we just undid one rev, use an autosummary
1192                                                                 $firstrev = $oldrev->getNext();
1193                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1194                                                                         $userText = $undorev->getUserText();
1195                                                                         if ( $userText === '' ) {
1196                                                                                 $undoSummary = $this->context->msg(
1197                                                                                         'undo-summary-username-hidden',
1198                                                                                         $undo
1199                                                                                 )->inContentLanguage()->text();
1200                                                                         } else {
1201                                                                                 $undoSummary = $this->context->msg(
1202                                                                                         'undo-summary',
1203                                                                                         $undo,
1204                                                                                         $userText
1205                                                                                 )->inContentLanguage()->text();
1206                                                                         }
1207                                                                         if ( $this->summary === '' ) {
1208                                                                                 $this->summary = $undoSummary;
1209                                                                         } else {
1210                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1211                                                                                         ->inContentLanguage()->text() . $this->summary;
1212                                                                         }
1213                                                                         $this->undidRev = $undo;
1214                                                                 }
1215                                                                 $this->formtype = 'diff';
1216                                                         }
1217                                                 }
1218                                         } else {
1219                                                 // Failed basic sanity checks.
1220                                                 // Older revisions may have been removed since the link
1221                                                 // was created, or we may simply have got bogus input.
1222                                                 $undoMsg = 'norev';
1223                                         }
1224
1225                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1226                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1227                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1228                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1229                                 }
1230
1231                                 if ( $content === false ) {
1232                                         $content = $this->getOriginalContent( $wgUser );
1233                                 }
1234                         }
1235                 }
1236
1237                 return $content;
1238         }
1239
1240         /**
1241          * Get the content of the wanted revision, without section extraction.
1242          *
1243          * The result of this function can be used to compare user's input with
1244          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1245          * to the original text of the edit.
1246          *
1247          * This differs from Article::getContent() that when a missing revision is
1248          * encountered the result will be null and not the
1249          * 'missing-revision' message.
1250          *
1251          * @since 1.19
1252          * @param User $user The user to get the revision for
1253          * @return Content|null
1254          */
1255         private function getOriginalContent( User $user ) {
1256                 if ( $this->section == 'new' ) {
1257                         return $this->getCurrentContent();
1258                 }
1259                 $revision = $this->mArticle->getRevisionFetched();
1260                 if ( $revision === null ) {
1261                         $handler = ContentHandler::getForModelID( $this->contentModel );
1262                         return $handler->makeEmptyContent();
1263                 }
1264                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1265                 return $content;
1266         }
1267
1268         /**
1269          * Get the edit's parent revision ID
1270          *
1271          * The "parent" revision is the ancestor that should be recorded in this
1272          * page's revision history.  It is either the revision ID of the in-memory
1273          * article content, or in the case of a 3-way merge in order to rebase
1274          * across a recoverable edit conflict, the ID of the newer revision to
1275          * which we have rebased this page.
1276          *
1277          * @since 1.27
1278          * @return int Revision ID
1279          */
1280         public function getParentRevId() {
1281                 if ( $this->parentRevId ) {
1282                         return $this->parentRevId;
1283                 } else {
1284                         return $this->mArticle->getRevIdFetched();
1285                 }
1286         }
1287
1288         /**
1289          * Get the current content of the page. This is basically similar to
1290          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1291          * content object is returned instead of null.
1292          *
1293          * @since 1.21
1294          * @return Content
1295          */
1296         protected function getCurrentContent() {
1297                 $rev = $this->page->getRevision();
1298                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1299
1300                 if ( $content === false || $content === null ) {
1301                         $handler = ContentHandler::getForModelID( $this->contentModel );
1302                         return $handler->makeEmptyContent();
1303                 } elseif ( !$this->undidRev ) {
1304                         // Content models should always be the same since we error
1305                         // out if they are different before this point (in ->edit()).
1306                         // The exception being, during an undo, the current revision might
1307                         // differ from the prior revision.
1308                         $logger = LoggerFactory::getInstance( 'editpage' );
1309                         if ( $this->contentModel !== $rev->getContentModel() ) {
1310                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1311                                         'prev' => $this->contentModel,
1312                                         'new' => $rev->getContentModel(),
1313                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1314                                         'method' => __METHOD__
1315                                 ] );
1316                                 $this->contentModel = $rev->getContentModel();
1317                         }
1318
1319                         // Given that the content models should match, the current selected
1320                         // format should be supported.
1321                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1322                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1323
1324                                         'prev' => $this->contentFormat,
1325                                         'new' => $rev->getContentFormat(),
1326                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1327                                         'method' => __METHOD__
1328                                 ] );
1329                                 $this->contentFormat = $rev->getContentFormat();
1330                         }
1331                 }
1332                 return $content;
1333         }
1334
1335         /**
1336          * Use this method before edit() to preload some content into the edit box
1337          *
1338          * @param Content $content
1339          *
1340          * @since 1.21
1341          */
1342         public function setPreloadedContent( Content $content ) {
1343                 $this->mPreloadContent = $content;
1344         }
1345
1346         /**
1347          * Get the contents to be preloaded into the box, either set by
1348          * an earlier setPreloadText() or by loading the given page.
1349          *
1350          * @param string $preload Representing the title to preload from.
1351          * @param array $params Parameters to use (interface-message style) in the preloaded text
1352          *
1353          * @return Content
1354          *
1355          * @since 1.21
1356          */
1357         protected function getPreloadedContent( $preload, $params = [] ) {
1358                 global $wgUser;
1359
1360                 if ( !empty( $this->mPreloadContent ) ) {
1361                         return $this->mPreloadContent;
1362                 }
1363
1364                 $handler = ContentHandler::getForModelID( $this->contentModel );
1365
1366                 if ( $preload === '' ) {
1367                         return $handler->makeEmptyContent();
1368                 }
1369
1370                 $title = Title::newFromText( $preload );
1371                 # Check for existence to avoid getting MediaWiki:Noarticletext
1372                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1373                         // TODO: somehow show a warning to the user!
1374                         return $handler->makeEmptyContent();
1375                 }
1376
1377                 $page = WikiPage::factory( $title );
1378                 if ( $page->isRedirect() ) {
1379                         $title = $page->getRedirectTarget();
1380                         # Same as before
1381                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1382                                 // TODO: somehow show a warning to the user!
1383                                 return $handler->makeEmptyContent();
1384                         }
1385                         $page = WikiPage::factory( $title );
1386                 }
1387
1388                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1389                 $content = $page->getContent( Revision::RAW );
1390
1391                 if ( !$content ) {
1392                         // TODO: somehow show a warning to the user!
1393                         return $handler->makeEmptyContent();
1394                 }
1395
1396                 if ( $content->getModel() !== $handler->getModelID() ) {
1397                         $converted = $content->convert( $handler->getModelID() );
1398
1399                         if ( !$converted ) {
1400                                 // TODO: somehow show a warning to the user!
1401                                 wfDebug( "Attempt to preload incompatible content: " .
1402                                         "can't convert " . $content->getModel() .
1403                                         " to " . $handler->getModelID() );
1404
1405                                 return $handler->makeEmptyContent();
1406                         }
1407
1408                         $content = $converted;
1409                 }
1410
1411                 return $content->preloadTransform( $title, $parserOptions, $params );
1412         }
1413
1414         /**
1415          * Make sure the form isn't faking a user's credentials.
1416          *
1417          * @param WebRequest $request
1418          * @return bool
1419          * @private
1420          */
1421         public function tokenOk( &$request ) {
1422                 global $wgUser;
1423                 $token = $request->getVal( 'wpEditToken' );
1424                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1425                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1426                 return $this->mTokenOk;
1427         }
1428
1429         /**
1430          * Sets post-edit cookie indicating the user just saved a particular revision.
1431          *
1432          * This uses a temporary cookie for each revision ID so separate saves will never
1433          * interfere with each other.
1434          *
1435          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1436          * the redirect.  It must be clearable by JavaScript code, so it must not be
1437          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1438          * variable.
1439          *
1440          * If the variable were set on the server, it would be cached, which is unwanted
1441          * since the post-edit state should only apply to the load right after the save.
1442          *
1443          * @param int $statusValue The status value (to check for new article status)
1444          */
1445         protected function setPostEditCookie( $statusValue ) {
1446                 $revisionId = $this->page->getLatest();
1447                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1448
1449                 $val = 'saved';
1450                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1451                         $val = 'created';
1452                 } elseif ( $this->oldid ) {
1453                         $val = 'restored';
1454                 }
1455
1456                 $response = RequestContext::getMain()->getRequest()->response();
1457                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, [
1458                         'httpOnly' => false,
1459                 ] );
1460         }
1461
1462         /**
1463          * Attempt submission
1464          * @param array|bool $resultDetails See docs for $result in internalAttemptSave
1465          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1466          * @return Status The resulting status object.
1467          */
1468         public function attemptSave( &$resultDetails = false ) {
1469                 global $wgUser;
1470
1471                 # Allow bots to exempt some edits from bot flagging
1472                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1473                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1474
1475                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1476
1477                 return $status;
1478         }
1479
1480         /**
1481          * Handle status, such as after attempt save
1482          *
1483          * @param Status $status
1484          * @param array|bool $resultDetails
1485          *
1486          * @throws ErrorPageError
1487          * @return bool False, if output is done, true if rest of the form should be displayed
1488          */
1489         private function handleStatus( Status $status, $resultDetails ) {
1490                 global $wgUser, $wgOut;
1491
1492                 /**
1493                  * @todo FIXME: once the interface for internalAttemptSave() is made
1494                  *   nicer, this should use the message in $status
1495                  */
1496                 if ( $status->value == self::AS_SUCCESS_UPDATE
1497                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1498                 ) {
1499                         $this->didSave = true;
1500                         if ( !$resultDetails['nullEdit'] ) {
1501                                 $this->setPostEditCookie( $status->value );
1502                         }
1503                 }
1504
1505                 // "wpExtraQueryRedirect" is a hidden input to modify
1506                 // after save URL and is not used by actual edit form
1507                 $request = RequestContext::getMain()->getRequest();
1508                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1509
1510                 switch ( $status->value ) {
1511                         case self::AS_HOOK_ERROR_EXPECTED:
1512                         case self::AS_CONTENT_TOO_BIG:
1513                         case self::AS_ARTICLE_WAS_DELETED:
1514                         case self::AS_CONFLICT_DETECTED:
1515                         case self::AS_SUMMARY_NEEDED:
1516                         case self::AS_TEXTBOX_EMPTY:
1517                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1518                         case self::AS_END:
1519                         case self::AS_BLANK_ARTICLE:
1520                         case self::AS_SELF_REDIRECT:
1521                                 return true;
1522
1523                         case self::AS_HOOK_ERROR:
1524                                 return false;
1525
1526                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1527                         case self::AS_PARSE_ERROR:
1528                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1529                                 return true;
1530
1531                         case self::AS_SUCCESS_NEW_ARTICLE:
1532                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1533                                 if ( $extraQueryRedirect ) {
1534                                         if ( $query === '' ) {
1535                                                 $query = $extraQueryRedirect;
1536                                         } else {
1537                                                 $query = $query . '&' . $extraQueryRedirect;
1538                                         }
1539                                 }
1540                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1541                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1542                                 return false;
1543
1544                         case self::AS_SUCCESS_UPDATE:
1545                                 $extraQuery = '';
1546                                 $sectionanchor = $resultDetails['sectionanchor'];
1547
1548                                 // Give extensions a chance to modify URL query on update
1549                                 Hooks::run(
1550                                         'ArticleUpdateBeforeRedirect',
1551                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1552                                 );
1553
1554                                 if ( $resultDetails['redirect'] ) {
1555                                         if ( $extraQuery == '' ) {
1556                                                 $extraQuery = 'redirect=no';
1557                                         } else {
1558                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1559                                         }
1560                                 }
1561                                 if ( $extraQueryRedirect ) {
1562                                         if ( $extraQuery === '' ) {
1563                                                 $extraQuery = $extraQueryRedirect;
1564                                         } else {
1565                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1566                                         }
1567                                 }
1568
1569                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1570                                 return false;
1571
1572                         case self::AS_SPAM_ERROR:
1573                                 $this->spamPageWithContent( $resultDetails['spam'] );
1574                                 return false;
1575
1576                         case self::AS_BLOCKED_PAGE_FOR_USER:
1577                                 throw new UserBlockedError( $wgUser->getBlock() );
1578
1579                         case self::AS_IMAGE_REDIRECT_ANON:
1580                         case self::AS_IMAGE_REDIRECT_LOGGED:
1581                                 throw new PermissionsError( 'upload' );
1582
1583                         case self::AS_READ_ONLY_PAGE_ANON:
1584                         case self::AS_READ_ONLY_PAGE_LOGGED:
1585                                 throw new PermissionsError( 'edit' );
1586
1587                         case self::AS_READ_ONLY_PAGE:
1588                                 throw new ReadOnlyError;
1589
1590                         case self::AS_RATE_LIMITED:
1591                                 throw new ThrottledError();
1592
1593                         case self::AS_NO_CREATE_PERMISSION:
1594                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1595                                 throw new PermissionsError( $permission );
1596
1597                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1598                                 throw new PermissionsError( 'editcontentmodel' );
1599
1600                         default:
1601                                 // We don't recognize $status->value. The only way that can happen
1602                                 // is if an extension hook aborted from inside ArticleSave.
1603                                 // Render the status object into $this->hookError
1604                                 // FIXME this sucks, we should just use the Status object throughout
1605                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1606                                         '</div>';
1607                                 return true;
1608                 }
1609         }
1610
1611         /**
1612          * Run hooks that can filter edits just before they get saved.
1613          *
1614          * @param Content $content The Content to filter.
1615          * @param Status $status For reporting the outcome to the caller
1616          * @param User $user The user performing the edit
1617          *
1618          * @return bool
1619          */
1620         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1621                 // Run old style post-section-merge edit filter
1622                 if ( $this->hookError != '' ) {
1623                         # ...or the hook could be expecting us to produce an error
1624                         $status->fatal( 'hookaborted' );
1625                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1626                         return false;
1627                 }
1628
1629                 // Run new style post-section-merge edit filter
1630                 if ( !Hooks::run( 'EditFilterMergedContent',
1631                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1632                                 $user, $this->minoredit ] )
1633                 ) {
1634                         # Error messages etc. could be handled within the hook...
1635                         if ( $status->isGood() ) {
1636                                 $status->fatal( 'hookaborted' );
1637                                 // Not setting $this->hookError here is a hack to allow the hook
1638                                 // to cause a return to the edit page without $this->hookError
1639                                 // being set. This is used by ConfirmEdit to display a captcha
1640                                 // without any error message cruft.
1641                         } else {
1642                                 $this->hookError = $status->getWikiText();
1643                         }
1644                         // Use the existing $status->value if the hook set it
1645                         if ( !$status->value ) {
1646                                 $status->value = self::AS_HOOK_ERROR;
1647                         }
1648                         return false;
1649                 } elseif ( !$status->isOK() ) {
1650                         # ...or the hook could be expecting us to produce an error
1651                         // FIXME this sucks, we should just use the Status object throughout
1652                         $this->hookError = $status->getWikiText();
1653                         $status->fatal( 'hookaborted' );
1654                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1655                         return false;
1656                 }
1657
1658                 return true;
1659         }
1660
1661         /**
1662          * Return the summary to be used for a new section.
1663          *
1664          * @param string $sectionanchor Set to the section anchor text
1665          * @return string
1666          */
1667         private function newSectionSummary( &$sectionanchor = null ) {
1668                 global $wgParser;
1669
1670                 if ( $this->sectiontitle !== '' ) {
1671                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1672                         // If no edit summary was specified, create one automatically from the section
1673                         // title and have it link to the new section. Otherwise, respect the summary as
1674                         // passed.
1675                         if ( $this->summary === '' ) {
1676                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1677                                 return $this->context->msg( 'newsectionsummary' )
1678                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1679                         }
1680                 } elseif ( $this->summary !== '' ) {
1681                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1682                         # This is a new section, so create a link to the new section
1683                         # in the revision summary.
1684                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1685                         return $this->context->msg( 'newsectionsummary' )
1686                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1687                 }
1688                 return $this->summary;
1689         }
1690
1691         /**
1692          * Attempt submission (no UI)
1693          *
1694          * @param array $result Array to add statuses to, currently with the
1695          *   possible keys:
1696          *   - spam (string): Spam string from content if any spam is detected by
1697          *     matchSpamRegex.
1698          *   - sectionanchor (string): Section anchor for a section save.
1699          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1700          *     false otherwise.
1701          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1702          *     revision is a redirect.
1703          * @param bool $bot True if edit is being made under the bot right.
1704          *
1705          * @return Status Status object, possibly with a message, but always with
1706          *   one of the AS_* constants in $status->value,
1707          *
1708          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1709          *   various error display idiosyncrasies. There are also lots of cases
1710          *   where error metadata is set in the object and retrieved later instead
1711          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1712          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1713          * time.
1714          */
1715         public function internalAttemptSave( &$result, $bot = false ) {
1716                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1717                 global $wgContentHandlerUseDB;
1718
1719                 $status = Status::newGood();
1720
1721                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1722                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1723                         $status->fatal( 'hookaborted' );
1724                         $status->value = self::AS_HOOK_ERROR;
1725                         return $status;
1726                 }
1727
1728                 $spam = $wgRequest->getText( 'wpAntispam' );
1729                 if ( $spam !== '' ) {
1730                         wfDebugLog(
1731                                 'SimpleAntiSpam',
1732                                 $wgUser->getName() .
1733                                 ' editing "' .
1734                                 $this->mTitle->getPrefixedText() .
1735                                 '" submitted bogus field "' .
1736                                 $spam .
1737                                 '"'
1738                         );
1739                         $status->fatal( 'spamprotectionmatch', false );
1740                         $status->value = self::AS_SPAM_ERROR;
1741                         return $status;
1742                 }
1743
1744                 try {
1745                         # Construct Content object
1746                         $textbox_content = $this->toEditContent( $this->textbox1 );
1747                 } catch ( MWContentSerializationException $ex ) {
1748                         $status->fatal(
1749                                 'content-failed-to-parse',
1750                                 $this->contentModel,
1751                                 $this->contentFormat,
1752                                 $ex->getMessage()
1753                         );
1754                         $status->value = self::AS_PARSE_ERROR;
1755                         return $status;
1756                 }
1757
1758                 # Check image redirect
1759                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1760                         $textbox_content->isRedirect() &&
1761                         !$wgUser->isAllowed( 'upload' )
1762                 ) {
1763                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1764                                 $status->setResult( false, $code );
1765
1766                                 return $status;
1767                 }
1768
1769                 # Check for spam
1770                 $match = self::matchSummarySpamRegex( $this->summary );
1771                 if ( $match === false && $this->section == 'new' ) {
1772                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1773                         # regular summaries, it is added to the actual wikitext.
1774                         if ( $this->sectiontitle !== '' ) {
1775                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1776                                 $match = self::matchSpamRegex( $this->sectiontitle );
1777                         } else {
1778                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1779                                 # is used with the 'summary' parameter.
1780                                 $match = self::matchSpamRegex( $this->summary );
1781                         }
1782                 }
1783                 if ( $match === false ) {
1784                         $match = self::matchSpamRegex( $this->textbox1 );
1785                 }
1786                 if ( $match !== false ) {
1787                         $result['spam'] = $match;
1788                         $ip = $wgRequest->getIP();
1789                         $pdbk = $this->mTitle->getPrefixedDBkey();
1790                         $match = str_replace( "\n", '', $match );
1791                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1792                         $status->fatal( 'spamprotectionmatch', $match );
1793                         $status->value = self::AS_SPAM_ERROR;
1794                         return $status;
1795                 }
1796                 if ( !Hooks::run(
1797                         'EditFilter',
1798                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1799                 ) {
1800                         # Error messages etc. could be handled within the hook...
1801                         $status->fatal( 'hookaborted' );
1802                         $status->value = self::AS_HOOK_ERROR;
1803                         return $status;
1804                 } elseif ( $this->hookError != '' ) {
1805                         # ...or the hook could be expecting us to produce an error
1806                         $status->fatal( 'hookaborted' );
1807                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1808                         return $status;
1809                 }
1810
1811                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1812                         // Auto-block user's IP if the account was "hard" blocked
1813                         if ( !wfReadOnly() ) {
1814                                 $wgUser->spreadAnyEditBlock();
1815                         }
1816                         # Check block state against master, thus 'false'.
1817                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1818                         return $status;
1819                 }
1820
1821                 $this->contentLength = strlen( $this->textbox1 );
1822                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1823                         // Error will be displayed by showEditForm()
1824                         $this->tooBig = true;
1825                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1826                         return $status;
1827                 }
1828
1829                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1830                         if ( $wgUser->isAnon() ) {
1831                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1832                                 return $status;
1833                         } else {
1834                                 $status->fatal( 'readonlytext' );
1835                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1836                                 return $status;
1837                         }
1838                 }
1839
1840                 $changingContentModel = false;
1841                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1842                         if ( !$wgContentHandlerUseDB ) {
1843                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1844                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1845                                 return $status;
1846                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1847                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1848                                 return $status;
1849                         }
1850                         // Make sure the user can edit the page under the new content model too
1851                         $titleWithNewContentModel = clone $this->mTitle;
1852                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1853                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1854                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1855                         ) {
1856                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1857                                 return $status;
1858                         }
1859
1860                         $changingContentModel = true;
1861                         $oldContentModel = $this->mTitle->getContentModel();
1862                 }
1863
1864                 if ( $this->changeTags ) {
1865                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1866                                 $this->changeTags, $wgUser );
1867                         if ( !$changeTagsStatus->isOK() ) {
1868                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1869                                 return $changeTagsStatus;
1870                         }
1871                 }
1872
1873                 if ( wfReadOnly() ) {
1874                         $status->fatal( 'readonlytext' );
1875                         $status->value = self::AS_READ_ONLY_PAGE;
1876                         return $status;
1877                 }
1878                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1879                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1880                 ) {
1881                         $status->fatal( 'actionthrottledtext' );
1882                         $status->value = self::AS_RATE_LIMITED;
1883                         return $status;
1884                 }
1885
1886                 # If the article has been deleted while editing, don't save it without
1887                 # confirmation
1888                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1889                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1890                         return $status;
1891                 }
1892
1893                 # Load the page data from the master. If anything changes in the meantime,
1894                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1895                 $this->page->loadPageData( 'fromdbmaster' );
1896                 $new = !$this->page->exists();
1897
1898                 if ( $new ) {
1899                         // Late check for create permission, just in case *PARANOIA*
1900                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1901                                 $status->fatal( 'nocreatetext' );
1902                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1903                                 wfDebug( __METHOD__ . ": no create permission\n" );
1904                                 return $status;
1905                         }
1906
1907                         // Don't save a new page if it's blank or if it's a MediaWiki:
1908                         // message with content equivalent to default (allow empty pages
1909                         // in this case to disable messages, see T52124)
1910                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1911                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1912                                 $defaultText = $defaultMessageText;
1913                         } else {
1914                                 $defaultText = '';
1915                         }
1916
1917                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1918                                 $this->blankArticle = true;
1919                                 $status->fatal( 'blankarticle' );
1920                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1921                                 return $status;
1922                         }
1923
1924                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1925                                 return $status;
1926                         }
1927
1928                         $content = $textbox_content;
1929
1930                         $result['sectionanchor'] = '';
1931                         if ( $this->section == 'new' ) {
1932                                 if ( $this->sectiontitle !== '' ) {
1933                                         // Insert the section title above the content.
1934                                         $content = $content->addSectionHeader( $this->sectiontitle );
1935                                 } elseif ( $this->summary !== '' ) {
1936                                         // Insert the section title above the content.
1937                                         $content = $content->addSectionHeader( $this->summary );
1938                                 }
1939                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1940                         }
1941
1942                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1943
1944                 } else { # not $new
1945
1946                         # Article exists. Check for edit conflict.
1947
1948                         $this->page->clear(); # Force reload of dates, etc.
1949                         $timestamp = $this->page->getTimestamp();
1950                         $latest = $this->page->getLatest();
1951
1952                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1953
1954                         // Check editRevId if set, which handles same-second timestamp collisions
1955                         if ( $timestamp != $this->edittime
1956                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1957                         ) {
1958                                 $this->isConflict = true;
1959                                 if ( $this->section == 'new' ) {
1960                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1961                                                 $this->page->getComment() == $this->newSectionSummary()
1962                                         ) {
1963                                                 // Probably a duplicate submission of a new comment.
1964                                                 // This can happen when CDN resends a request after
1965                                                 // a timeout but the first one actually went through.
1966                                                 wfDebug( __METHOD__
1967                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1968                                         } else {
1969                                                 // New comment; suppress conflict.
1970                                                 $this->isConflict = false;
1971                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1972                                         }
1973                                 } elseif ( $this->section == ''
1974                                         && Revision::userWasLastToEdit(
1975                                                 DB_MASTER, $this->mTitle->getArticleID(),
1976                                                 $wgUser->getId(), $this->edittime
1977                                         )
1978                                 ) {
1979                                         # Suppress edit conflict with self, except for section edits where merging is required.
1980                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1981                                         $this->isConflict = false;
1982                                 }
1983                         }
1984
1985                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1986                         if ( $this->sectiontitle !== '' ) {
1987                                 $sectionTitle = $this->sectiontitle;
1988                         } else {
1989                                 $sectionTitle = $this->summary;
1990                         }
1991
1992                         $content = null;
1993
1994                         if ( $this->isConflict ) {
1995                                 wfDebug( __METHOD__
1996                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1997                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
1998                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
1999                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2000                                 if ( $this->editRevId !== null ) {
2001                                         $content = $this->page->replaceSectionAtRev(
2002                                                 $this->section,
2003                                                 $textbox_content,
2004                                                 $sectionTitle,
2005                                                 $this->editRevId
2006                                         );
2007                                 } else {
2008                                         $content = $this->page->replaceSectionContent(
2009                                                 $this->section,
2010                                                 $textbox_content,
2011                                                 $sectionTitle,
2012                                                 $this->edittime
2013                                         );
2014                                 }
2015                         } else {
2016                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2017                                 $content = $this->page->replaceSectionContent(
2018                                         $this->section,
2019                                         $textbox_content,
2020                                         $sectionTitle
2021                                 );
2022                         }
2023
2024                         if ( is_null( $content ) ) {
2025                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2026                                 $this->isConflict = true;
2027                                 $content = $textbox_content; // do not try to merge here!
2028                         } elseif ( $this->isConflict ) {
2029                                 # Attempt merge
2030                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2031                                         // Successful merge! Maybe we should tell the user the good news?
2032                                         $this->isConflict = false;
2033                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2034                                 } else {
2035                                         $this->section = '';
2036                                         $this->textbox1 = ContentHandler::getContentText( $content );
2037                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2038                                 }
2039                         }
2040
2041                         if ( $this->isConflict ) {
2042                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2043                                 return $status;
2044                         }
2045
2046                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2047                                 return $status;
2048                         }
2049
2050                         if ( $this->section == 'new' ) {
2051                                 // Handle the user preference to force summaries here
2052                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2053                                         $this->missingSummary = true;
2054                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2055                                         $status->value = self::AS_SUMMARY_NEEDED;
2056                                         return $status;
2057                                 }
2058
2059                                 // Do not allow the user to post an empty comment
2060                                 if ( $this->textbox1 == '' ) {
2061                                         $this->missingComment = true;
2062                                         $status->fatal( 'missingcommenttext' );
2063                                         $status->value = self::AS_TEXTBOX_EMPTY;
2064                                         return $status;
2065                                 }
2066                         } elseif ( !$this->allowBlankSummary
2067                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2068                                 && !$content->isRedirect()
2069                                 && md5( $this->summary ) == $this->autoSumm
2070                         ) {
2071                                 $this->missingSummary = true;
2072                                 $status->fatal( 'missingsummary' );
2073                                 $status->value = self::AS_SUMMARY_NEEDED;
2074                                 return $status;
2075                         }
2076
2077                         # All's well
2078                         $sectionanchor = '';
2079                         if ( $this->section == 'new' ) {
2080                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2081                         } elseif ( $this->section != '' ) {
2082                                 # Try to get a section anchor from the section source, redirect
2083                                 # to edited section if header found.
2084                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2085                                 # for duplicate heading checking and maybe parsing.
2086                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2087                                 # We can't deal with anchors, includes, html etc in the header for now,
2088                                 # headline would need to be parsed to improve this.
2089                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2090                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
2091                                 }
2092                         }
2093                         $result['sectionanchor'] = $sectionanchor;
2094
2095                         // Save errors may fall down to the edit form, but we've now
2096                         // merged the section into full text. Clear the section field
2097                         // so that later submission of conflict forms won't try to
2098                         // replace that into a duplicated mess.
2099                         $this->textbox1 = $this->toEditText( $content );
2100                         $this->section = '';
2101
2102                         $status->value = self::AS_SUCCESS_UPDATE;
2103                 }
2104
2105                 if ( !$this->allowSelfRedirect
2106                         && $content->isRedirect()
2107                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2108                 ) {
2109                         // If the page already redirects to itself, don't warn.
2110                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2111                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2112                                 $this->selfRedirect = true;
2113                                 $status->fatal( 'selfredirect' );
2114                                 $status->value = self::AS_SELF_REDIRECT;
2115                                 return $status;
2116                         }
2117                 }
2118
2119                 // Check for length errors again now that the section is merged in
2120                 $this->contentLength = strlen( $this->toEditText( $content ) );
2121                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2122                         $this->tooBig = true;
2123                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2124                         return $status;
2125                 }
2126
2127                 $flags = EDIT_AUTOSUMMARY |
2128                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2129                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2130                         ( $bot ? EDIT_FORCE_BOT : 0 );
2131
2132                 $doEditStatus = $this->page->doEditContent(
2133                         $content,
2134                         $this->summary,
2135                         $flags,
2136                         false,
2137                         $wgUser,
2138                         $content->getDefaultFormat(),
2139                         $this->changeTags,
2140                         $this->undidRev
2141                 );
2142
2143                 if ( !$doEditStatus->isOK() ) {
2144                         // Failure from doEdit()
2145                         // Show the edit conflict page for certain recognized errors from doEdit(),
2146                         // but don't show it for errors from extension hooks
2147                         $errors = $doEditStatus->getErrorsArray();
2148                         if ( in_array( $errors[0][0],
2149                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2150                         ) {
2151                                 $this->isConflict = true;
2152                                 // Destroys data doEdit() put in $status->value but who cares
2153                                 $doEditStatus->value = self::AS_END;
2154                         }
2155                         return $doEditStatus;
2156                 }
2157
2158                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2159                 if ( $result['nullEdit'] ) {
2160                         // We don't know if it was a null edit until now, so increment here
2161                         $wgUser->pingLimiter( 'linkpurge' );
2162                 }
2163                 $result['redirect'] = $content->isRedirect();
2164
2165                 $this->updateWatchlist();
2166
2167                 // If the content model changed, add a log entry
2168                 if ( $changingContentModel ) {
2169                         $this->addContentModelChangeLogEntry(
2170                                 $wgUser,
2171                                 $new ? false : $oldContentModel,
2172                                 $this->contentModel,
2173                                 $this->summary
2174                         );
2175                 }
2176
2177                 return $status;
2178         }
2179
2180         /**
2181          * @param User $user
2182          * @param string|false $oldModel false if the page is being newly created
2183          * @param string $newModel
2184          * @param string $reason
2185          */
2186         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2187                 $new = $oldModel === false;
2188                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2189                 $log->setPerformer( $user );
2190                 $log->setTarget( $this->mTitle );
2191                 $log->setComment( $reason );
2192                 $log->setParameters( [
2193                         '4::oldmodel' => $oldModel,
2194                         '5::newmodel' => $newModel
2195                 ] );
2196                 $logid = $log->insert();
2197                 $log->publish( $logid );
2198         }
2199
2200         /**
2201          * Register the change of watch status
2202          */
2203         protected function updateWatchlist() {
2204                 global $wgUser;
2205
2206                 if ( !$wgUser->isLoggedIn() ) {
2207                         return;
2208                 }
2209
2210                 $user = $wgUser;
2211                 $title = $this->mTitle;
2212                 $watch = $this->watchthis;
2213                 // Do this in its own transaction to reduce contention...
2214                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2215                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2216                                 return; // nothing to change
2217                         }
2218                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2219                 } );
2220         }
2221
2222         /**
2223          * Attempts to do 3-way merge of edit content with a base revision
2224          * and current content, in case of edit conflict, in whichever way appropriate
2225          * for the content type.
2226          *
2227          * @since 1.21
2228          *
2229          * @param Content $editContent
2230          *
2231          * @return bool
2232          */
2233         private function mergeChangesIntoContent( &$editContent ) {
2234                 $db = wfGetDB( DB_MASTER );
2235
2236                 // This is the revision the editor started from
2237                 $baseRevision = $this->getBaseRevision();
2238                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2239
2240                 if ( is_null( $baseContent ) ) {
2241                         return false;
2242                 }
2243
2244                 // The current state, we want to merge updates into it
2245                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2246                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2247
2248                 if ( is_null( $currentContent ) ) {
2249                         return false;
2250                 }
2251
2252                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2253
2254                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2255
2256                 if ( $result ) {
2257                         $editContent = $result;
2258                         // Update parentRevId to what we just merged.
2259                         $this->parentRevId = $currentRevision->getId();
2260                         return true;
2261                 }
2262
2263                 return false;
2264         }
2265
2266         /**
2267          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2268          *        one might think of X as the "base revision", which is NOT what this returns.
2269          * @return Revision Current version when the edit was started
2270          */
2271         public function getBaseRevision() {
2272                 if ( !$this->mBaseRevision ) {
2273                         $db = wfGetDB( DB_MASTER );
2274                         $this->mBaseRevision = $this->editRevId
2275                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2276                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2277                 }
2278                 return $this->mBaseRevision;
2279         }
2280
2281         /**
2282          * Check given input text against $wgSpamRegex, and return the text of the first match.
2283          *
2284          * @param string $text
2285          *
2286          * @return string|bool Matching string or false
2287          */
2288         public static function matchSpamRegex( $text ) {
2289                 global $wgSpamRegex;
2290                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2291                 $regexes = (array)$wgSpamRegex;
2292                 return self::matchSpamRegexInternal( $text, $regexes );
2293         }
2294
2295         /**
2296          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2297          *
2298          * @param string $text
2299          *
2300          * @return string|bool Matching string or false
2301          */
2302         public static function matchSummarySpamRegex( $text ) {
2303                 global $wgSummarySpamRegex;
2304                 $regexes = (array)$wgSummarySpamRegex;
2305                 return self::matchSpamRegexInternal( $text, $regexes );
2306         }
2307
2308         /**
2309          * @param string $text
2310          * @param array $regexes
2311          * @return bool|string
2312          */
2313         protected static function matchSpamRegexInternal( $text, $regexes ) {
2314                 foreach ( $regexes as $regex ) {
2315                         $matches = [];
2316                         if ( preg_match( $regex, $text, $matches ) ) {
2317                                 return $matches[0];
2318                         }
2319                 }
2320                 return false;
2321         }
2322
2323         public function setHeaders() {
2324                 global $wgOut, $wgUser, $wgAjaxEditStash;
2325
2326                 $wgOut->addModules( 'mediawiki.action.edit' );
2327                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2328
2329                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2330                         // The addition of default buttons is handled by getEditToolbar() which
2331                         // has its own dependency on this module. The call here ensures the module
2332                         // is loaded in time (it has position "top") for other modules to register
2333                         // buttons (e.g. extensions, gadgets, user scripts).
2334                         $wgOut->addModules( 'mediawiki.toolbar' );
2335                 }
2336
2337                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2338                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2339                 }
2340
2341                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2342                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2343                 }
2344
2345                 # Enabled article-related sidebar, toplinks, etc.
2346                 $wgOut->setArticleRelated( true );
2347
2348                 $contextTitle = $this->getContextTitle();
2349                 if ( $this->isConflict ) {
2350                         $msg = 'editconflict';
2351                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2352                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2353                 } else {
2354                         $msg = $contextTitle->exists()
2355                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2356                                         && $contextTitle->getDefaultMessageText() !== false
2357                                 )
2358                                 ? 'editing'
2359                                 : 'creating';
2360                 }
2361
2362                 # Use the title defined by DISPLAYTITLE magic word when present
2363                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2364                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2365                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2366                 if ( $displayTitle === false ) {
2367                         $displayTitle = $contextTitle->getPrefixedText();
2368                 }
2369                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2370                 # Transmit the name of the message to JavaScript for live preview
2371                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2372                 $wgOut->addJsConfigVars( [
2373                         'wgEditMessage' => $msg,
2374                         'wgAjaxEditStash' => $wgAjaxEditStash,
2375                 ] );
2376         }
2377
2378         /**
2379          * Show all applicable editing introductions
2380          */
2381         protected function showIntro() {
2382                 global $wgOut, $wgUser;
2383                 if ( $this->suppressIntro ) {
2384                         return;
2385                 }
2386
2387                 $namespace = $this->mTitle->getNamespace();
2388
2389                 if ( $namespace == NS_MEDIAWIKI ) {
2390                         # Show a warning if editing an interface message
2391                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2392                         # If this is a default message (but not css or js),
2393                         # show a hint that it is translatable on translatewiki.net
2394                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2395                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2396                         ) {
2397                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2398                                 if ( $defaultMessageText !== false ) {
2399                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2400                                                 'translateinterface' );
2401                                 }
2402                         }
2403                 } elseif ( $namespace == NS_FILE ) {
2404                         # Show a hint to shared repo
2405                         $file = wfFindFile( $this->mTitle );
2406                         if ( $file && !$file->isLocal() ) {
2407                                 $descUrl = $file->getDescriptionUrl();
2408                                 # there must be a description url to show a hint to shared repo
2409                                 if ( $descUrl ) {
2410                                         if ( !$this->mTitle->exists() ) {
2411                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2412                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2413                                                 ] );
2414                                         } else {
2415                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2416                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2417                                                 ] );
2418                                         }
2419                                 }
2420                         }
2421                 }
2422
2423                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2424                 # Show log extract when the user is currently blocked
2425                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2426                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2427                         $user = User::newFromName( $username, false /* allow IP users */ );
2428                         $ip = User::isIP( $username );
2429                         $block = Block::newFromTarget( $user, $user );
2430                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2431                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2432                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2433                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2434                                 # Show log extract if the user is currently blocked
2435                                 LogEventsList::showLogExtract(
2436                                         $wgOut,
2437                                         'block',
2438                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2439                                         '',
2440                                         [
2441                                                 'lim' => 1,
2442                                                 'showIfEmpty' => false,
2443                                                 'msgKey' => [
2444                                                         'blocked-notice-logextract',
2445                                                         $user->getName() # Support GENDER in notice
2446                                                 ]
2447                                         ]
2448                                 );
2449                         }
2450                 }
2451                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2452                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2453                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2454                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2455                         ) );
2456                         if ( $wgUser->isLoggedIn() ) {
2457                                 $wgOut->wrapWikiMsg(
2458                                         // Suppress the external link icon, consider the help url an internal one
2459                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2460                                         [
2461                                                 'newarticletext',
2462                                                 $helpLink
2463                                         ]
2464                                 );
2465                         } else {
2466                                 $wgOut->wrapWikiMsg(
2467                                         // Suppress the external link icon, consider the help url an internal one
2468                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2469                                         [
2470                                                 'newarticletextanon',
2471                                                 $helpLink
2472                                         ]
2473                                 );
2474                         }
2475                 }
2476                 # Give a notice if the user is editing a deleted/moved page...
2477                 if ( !$this->mTitle->exists() ) {
2478                         $dbr = wfGetDB( DB_REPLICA );
2479
2480                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2481                                 '',
2482                                 [
2483                                         'lim' => 10,
2484                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2485                                         'showIfEmpty' => false,
2486                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2487                                 ]
2488                         );
2489                 }
2490         }
2491
2492         /**
2493          * Attempt to show a custom editing introduction, if supplied
2494          *
2495          * @return bool
2496          */
2497         protected function showCustomIntro() {
2498                 if ( $this->editintro ) {
2499                         $title = Title::newFromText( $this->editintro );
2500                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2501                                 global $wgOut;
2502                                 // Added using template syntax, to take <noinclude>'s into account.
2503                                 $wgOut->addWikiTextTitleTidy(
2504                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2505                                         $this->mTitle
2506                                 );
2507                                 return true;
2508                         }
2509                 }
2510                 return false;
2511         }
2512
2513         /**
2514          * Gets an editable textual representation of $content.
2515          * The textual representation can be turned by into a Content object by the
2516          * toEditContent() method.
2517          *
2518          * If $content is null or false or a string, $content is returned unchanged.
2519          *
2520          * If the given Content object is not of a type that can be edited using
2521          * the text base EditPage, an exception will be raised. Set
2522          * $this->allowNonTextContent to true to allow editing of non-textual
2523          * content.
2524          *
2525          * @param Content|null|bool|string $content
2526          * @return string The editable text form of the content.
2527          *
2528          * @throws MWException If $content is not an instance of TextContent and
2529          *   $this->allowNonTextContent is not true.
2530          */
2531         protected function toEditText( $content ) {
2532                 if ( $content === null || $content === false || is_string( $content ) ) {
2533                         return $content;
2534                 }
2535
2536                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2537                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2538                 }
2539
2540                 return $content->serialize( $this->contentFormat );
2541         }
2542
2543         /**
2544          * Turns the given text into a Content object by unserializing it.
2545          *
2546          * If the resulting Content object is not of a type that can be edited using
2547          * the text base EditPage, an exception will be raised. Set
2548          * $this->allowNonTextContent to true to allow editing of non-textual
2549          * content.
2550          *
2551          * @param string|null|bool $text Text to unserialize
2552          * @return Content|bool|null The content object created from $text. If $text was false
2553          *   or null, false resp. null will be  returned instead.
2554          *
2555          * @throws MWException If unserializing the text results in a Content
2556          *   object that is not an instance of TextContent and
2557          *   $this->allowNonTextContent is not true.
2558          */
2559         protected function toEditContent( $text ) {
2560                 if ( $text === false || $text === null ) {
2561                         return $text;
2562                 }
2563
2564                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2565                         $this->contentModel, $this->contentFormat );
2566
2567                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2568                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2569                 }
2570
2571                 return $content;
2572         }
2573
2574         /**
2575          * Send the edit form and related headers to $wgOut
2576          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2577          *     during form output near the top, for captchas and the like.
2578          *
2579          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2580          * use the EditPage::showEditForm:fields hook instead.
2581          */
2582         public function showEditForm( $formCallback = null ) {
2583                 global $wgOut, $wgUser;
2584
2585                 # need to parse the preview early so that we know which templates are used,
2586                 # otherwise users with "show preview after edit box" will get a blank list
2587                 # we parse this near the beginning so that setHeaders can do the title
2588                 # setting work instead of leaving it in getPreviewText
2589                 $previewOutput = '';
2590                 if ( $this->formtype == 'preview' ) {
2591                         $previewOutput = $this->getPreviewText();
2592                 }
2593
2594                 // Avoid PHP 7.1 warning of passing $this by reference
2595                 $editPage = $this;
2596                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$wgOut ] );
2597
2598                 $this->setHeaders();
2599
2600                 $this->addTalkPageText();
2601                 $this->addEditNotices();
2602
2603                 if ( !$this->isConflict &&
2604                         $this->section != '' &&
2605                         !$this->isSectionEditSupported() ) {
2606                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2607                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2608                         // Someone is welcome to try refactoring though
2609                         $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2610                         return;
2611                 }
2612
2613                 $this->showHeader();
2614
2615                 $wgOut->addHTML( $this->editFormPageTop );
2616
2617                 if ( $wgUser->getOption( 'previewontop' ) ) {
2618                         $this->displayPreviewArea( $previewOutput, true );
2619                 }
2620
2621                 $wgOut->addHTML( $this->editFormTextTop );
2622
2623                 $showToolbar = true;
2624                 if ( $this->wasDeletedSinceLastEdit() ) {
2625                         if ( $this->formtype == 'save' ) {
2626                                 // Hide the toolbar and edit area, user can click preview to get it back
2627                                 // Add an confirmation checkbox and explanation.
2628                                 $showToolbar = false;
2629                         } else {
2630                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2631                                         'deletedwhileediting' );
2632                         }
2633                 }
2634
2635                 // @todo add EditForm plugin interface and use it here!
2636                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2637                 $wgOut->addHTML( Html::openElement(
2638                         'form',
2639                         [
2640                                 'id' => self::EDITFORM_ID,
2641                                 'name' => self::EDITFORM_ID,
2642                                 'method' => 'post',
2643                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2644                                 'enctype' => 'multipart/form-data'
2645                         ]
2646                 ) );
2647
2648                 if ( is_callable( $formCallback ) ) {
2649                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2650                         call_user_func_array( $formCallback, [ &$wgOut ] );
2651                 }
2652
2653                 // Add an empty field to trip up spambots
2654                 $wgOut->addHTML(
2655                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2656                         . Html::rawElement(
2657                                 'label',
2658                                 [ 'for' => 'wpAntispam' ],
2659                                 $this->context->msg( 'simpleantispam-label' )->parse()
2660                         )
2661                         . Xml::element(
2662                                 'input',
2663                                 [
2664                                         'type' => 'text',
2665                                         'name' => 'wpAntispam',
2666                                         'id' => 'wpAntispam',
2667                                         'value' => ''
2668                                 ]
2669                         )
2670                         . Xml::closeElement( 'div' )
2671                 );
2672
2673                 // Avoid PHP 7.1 warning of passing $this by reference
2674                 $editPage = $this;
2675                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$wgOut ] );
2676
2677                 // Put these up at the top to ensure they aren't lost on early form submission
2678                 $this->showFormBeforeText();
2679
2680                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2681                         $username = $this->lastDelete->user_name;
2682                         $comment = $this->lastDelete->log_comment;
2683
2684                         // It is better to not parse the comment at all than to have templates expanded in the middle
2685                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2686                         $key = $comment === ''
2687                                 ? 'confirmrecreate-noreason'
2688                                 : 'confirmrecreate';
2689                         $wgOut->addHTML(
2690                                 '<div class="mw-confirm-recreate">' .
2691                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2692                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2693                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2694                                 ) .
2695                                 '</div>'
2696                         );
2697                 }
2698
2699                 # When the summary is hidden, also hide them on preview/show changes
2700                 if ( $this->nosummary ) {
2701                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2702                 }
2703
2704                 # If a blank edit summary was previously provided, and the appropriate
2705                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2706                 # user being bounced back more than once in the event that a summary
2707                 # is not required.
2708                 # ####
2709                 # For a bit more sophisticated detection of blank summaries, hash the
2710                 # automatic one and pass that in the hidden field wpAutoSummary.
2711                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2712                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2713                 }
2714
2715                 if ( $this->undidRev ) {
2716                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2717                 }
2718
2719                 if ( $this->selfRedirect ) {
2720                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2721                 }
2722
2723                 if ( $this->hasPresetSummary ) {
2724                         // If a summary has been preset using &summary= we don't want to prompt for
2725                         // a different summary. Only prompt for a summary if the summary is blanked.
2726                         // (T19416)
2727                         $this->autoSumm = md5( '' );
2728                 }
2729
2730                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2731                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2732
2733                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2734                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2735
2736                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2737                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2738
2739                 if ( $this->section == 'new' ) {
2740                         $this->showSummaryInput( true, $this->summary );
2741                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2742                 }
2743
2744                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2745
2746                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2747                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2748                 }
2749
2750                 if ( $this->blankArticle ) {
2751                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2752                 }
2753
2754                 if ( $this->isConflict ) {
2755                         // In an edit conflict bypass the overridable content form method
2756                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2757                         // resolved between page source edits and custom ui edits using the
2758                         // custom edit ui.
2759                         $this->textbox2 = $this->textbox1;
2760
2761                         $content = $this->getCurrentContent();
2762                         $this->textbox1 = $this->toEditText( $content );
2763
2764                         $this->showTextbox1();
2765                 } else {
2766                         $this->showContentForm();
2767                 }
2768
2769                 $wgOut->addHTML( $this->editFormTextAfterContent );
2770
2771                 $this->showStandardInputs();
2772
2773                 $this->showFormAfterText();
2774
2775                 $this->showTosSummary();
2776
2777                 $this->showEditTools();
2778
2779                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2780
2781                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2782
2783                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2784                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2785
2786                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2787                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2788
2789                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2790
2791                 if ( $this->isConflict ) {
2792                         try {
2793                                 $this->showConflict();
2794                         } catch ( MWContentSerializationException $ex ) {
2795                                 // this can't really happen, but be nice if it does.
2796                                 $msg = $this->context->msg(
2797                                         'content-failed-to-parse',
2798                                         $this->contentModel,
2799                                         $this->contentFormat,
2800                                         $ex->getMessage()
2801                                 );
2802                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2803                         }
2804                 }
2805
2806                 // Set a hidden field so JS knows what edit form mode we are in
2807                 if ( $this->isConflict ) {
2808                         $mode = 'conflict';
2809                 } elseif ( $this->preview ) {
2810                         $mode = 'preview';
2811                 } elseif ( $this->diff ) {
2812                         $mode = 'diff';
2813                 } else {
2814                         $mode = 'text';
2815                 }
2816                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2817
2818                 // Marker for detecting truncated form data.  This must be the last
2819                 // parameter sent in order to be of use, so do not move me.
2820                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2821                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2822
2823                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2824                         $this->displayPreviewArea( $previewOutput, false );
2825                 }
2826         }
2827
2828         /**
2829          * Wrapper around TemplatesOnThisPageFormatter to make
2830          * a "templates on this page" list.
2831          *
2832          * @param Title[] $templates
2833          * @return string HTML
2834          */
2835         public function makeTemplatesOnThisPageList( array $templates ) {
2836                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2837                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2838                 );
2839
2840                 // preview if preview, else section if section, else false
2841                 $type = false;
2842                 if ( $this->preview ) {
2843                         $type = 'preview';
2844                 } elseif ( $this->section != '' ) {
2845                         $type = 'section';
2846                 }
2847
2848                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2849                         $templateListFormatter->format( $templates, $type )
2850                 );
2851         }
2852
2853         /**
2854          * Extract the section title from current section text, if any.
2855          *
2856          * @param string $text
2857          * @return string|bool String or false
2858          */
2859         public static function extractSectionTitle( $text ) {
2860                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2861                 if ( !empty( $matches[2] ) ) {
2862                         global $wgParser;
2863                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2864                 } else {
2865                         return false;
2866                 }
2867         }
2868
2869         protected function showHeader() {
2870                 global $wgOut, $wgUser;
2871                 global $wgAllowUserCss, $wgAllowUserJs;
2872
2873                 if ( $this->isConflict ) {
2874                         $this->addExplainConflictHeader( $wgOut );
2875                         $this->editRevId = $this->page->getLatest();
2876                 } else {
2877                         if ( $this->section != '' && $this->section != 'new' ) {
2878                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2879                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2880                                         if ( $sectionTitle !== false ) {
2881                                                 $this->summary = "/* $sectionTitle */ ";
2882                                         }
2883                                 }
2884                         }
2885
2886                         if ( $this->missingComment ) {
2887                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2888                         }
2889
2890                         if ( $this->missingSummary && $this->section != 'new' ) {
2891                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2892                         }
2893
2894                         if ( $this->missingSummary && $this->section == 'new' ) {
2895                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2896                         }
2897
2898                         if ( $this->blankArticle ) {
2899                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2900                         }
2901
2902                         if ( $this->selfRedirect ) {
2903                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2904                         }
2905
2906                         if ( $this->hookError !== '' ) {
2907                                 $wgOut->addWikiText( $this->hookError );
2908                         }
2909
2910                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2911                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2912                         }
2913
2914                         if ( $this->section != 'new' ) {
2915                                 $revision = $this->mArticle->getRevisionFetched();
2916                                 if ( $revision ) {
2917                                         // Let sysop know that this will make private content public if saved
2918
2919                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2920                                                 $wgOut->wrapWikiMsg(
2921                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2922                                                         'rev-deleted-text-permission'
2923                                                 );
2924                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2925                                                 $wgOut->wrapWikiMsg(
2926                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2927                                                         'rev-deleted-text-view'
2928                                                 );
2929                                         }
2930
2931                                         if ( !$revision->isCurrent() ) {
2932                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2933                                                 $wgOut->addWikiMsg( 'editingold' );
2934                                                 $this->isOldRev = true;
2935                                         }
2936                                 } elseif ( $this->mTitle->exists() ) {
2937                                         // Something went wrong
2938
2939                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2940                                                 [ 'missing-revision', $this->oldid ] );
2941                                 }
2942                         }
2943                 }
2944
2945                 if ( wfReadOnly() ) {
2946                         $wgOut->wrapWikiMsg(
2947                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2948                                 [ 'readonlywarning', wfReadOnlyReason() ]
2949                         );
2950                 } elseif ( $wgUser->isAnon() ) {
2951                         if ( $this->formtype != 'preview' ) {
2952                                 $wgOut->wrapWikiMsg(
2953                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2954                                         [ 'anoneditwarning',
2955                                                 // Log-in link
2956                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2957                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2958                                                 ] ),
2959                                                 // Sign-up link
2960                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2961                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2962                                                 ] )
2963                                         ]
2964                                 );
2965                         } else {
2966                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
2967                                         'anonpreviewwarning'
2968                                 );
2969                         }
2970                 } else {
2971                         if ( $this->isCssJsSubpage ) {
2972                                 # Check the skin exists
2973                                 if ( $this->isWrongCaseCssJsPage ) {
2974                                         $wgOut->wrapWikiMsg(
2975                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2976                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
2977                                         );
2978                                 }
2979                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2980                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
2981                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
2982                                         );
2983                                         if ( $this->formtype !== 'preview' ) {
2984                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2985                                                         $wgOut->wrapWikiMsg(
2986                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2987                                                                 [ 'usercssyoucanpreview' ]
2988                                                         );
2989                                                 }
2990
2991                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
2992                                                         $wgOut->wrapWikiMsg(
2993                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2994                                                                 [ 'userjsyoucanpreview' ]
2995                                                         );
2996                                                 }
2997                                         }
2998                                 }
2999                         }
3000                 }
3001
3002                 $this->addPageProtectionWarningHeaders();
3003
3004                 $this->addLongPageWarningHeader();
3005
3006                 # Add header copyright warning
3007                 $this->showHeaderCopyrightWarning();
3008         }
3009
3010         /**
3011          * Standard summary input and label (wgSummary), abstracted so EditPage
3012          * subclasses may reorganize the form.
3013          * Note that you do not need to worry about the label's for=, it will be
3014          * inferred by the id given to the input. You can remove them both by
3015          * passing [ 'id' => false ] to $userInputAttrs.
3016          *
3017          * @param string $summary The value of the summary input
3018          * @param string $labelText The html to place inside the label
3019          * @param array $inputAttrs Array of attrs to use on the input
3020          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3021          *
3022          * @return array An array in the format [ $label, $input ]
3023          */
3024         public function getSummaryInput( $summary = "", $labelText = null,
3025                 $inputAttrs = null, $spanLabelAttrs = null
3026         ) {
3027                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3028                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3029                         'id' => 'wpSummary',
3030                         'maxlength' => '200',
3031                         'tabindex' => '1',
3032                         'size' => 60,
3033                         'spellcheck' => 'true',
3034                 ] + Linker::tooltipAndAccesskeyAttribs( 'summary' );
3035
3036                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3037                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3038                         'id' => "wpSummaryLabel"
3039                 ];
3040
3041                 $label = null;
3042                 if ( $labelText ) {
3043                         $label = Xml::tags(
3044                                 'label',
3045                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3046                                 $labelText
3047                         );
3048                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3049                 }
3050
3051                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3052
3053                 return [ $label, $input ];
3054         }
3055
3056         /**
3057          * @param bool $isSubjectPreview True if this is the section subject/title
3058          *   up top, or false if this is the comment summary
3059          *   down below the textarea
3060          * @param string $summary The text of the summary to display
3061          */
3062         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3063                 global $wgOut;
3064
3065                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3066                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3067                 if ( $isSubjectPreview ) {
3068                         if ( $this->nosummary ) {
3069                                 return;
3070                         }
3071                 } else {
3072                         if ( !$this->mShowSummaryField ) {
3073                                 return;
3074                         }
3075                 }
3076                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3077                 list( $label, $input ) = $this->getSummaryInput(
3078                         $summary,
3079                         $labelText,
3080                         [ 'class' => $summaryClass ],
3081                         []
3082                 );
3083                 $wgOut->addHTML( "{$label} {$input}" );
3084         }
3085
3086         /**
3087          * @param bool $isSubjectPreview True if this is the section subject/title
3088          *   up top, or false if this is the comment summary
3089          *   down below the textarea
3090          * @param string $summary The text of the summary to display
3091          * @return string
3092          */
3093         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3094                 // avoid spaces in preview, gets always trimmed on save
3095                 $summary = trim( $summary );
3096                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3097                         return "";
3098                 }
3099
3100                 global $wgParser;
3101
3102                 if ( $isSubjectPreview ) {
3103                         $summary = $this->context->msg( 'newsectionsummary' )
3104                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3105                                 ->inContentLanguage()->text();
3106                 }
3107
3108                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3109
3110                 $summary = $this->context->msg( $message )->parse()
3111                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3112                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3113         }
3114
3115         protected function showFormBeforeText() {
3116                 global $wgOut;
3117                 $section = htmlspecialchars( $this->section );
3118                 $wgOut->addHTML( <<<HTML
3119 <input type='hidden' value="{$section}" name="wpSection"/>
3120 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3121 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3122 <input type='hidden' value="{$this->editRevId}" name="editRevId" />
3123 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3124
3125 HTML
3126                 );
3127                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3128                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3129                 }
3130         }
3131
3132         protected function showFormAfterText() {
3133                 global $wgOut, $wgUser;
3134                 /**
3135                  * To make it harder for someone to slip a user a page
3136                  * which submits an edit form to the wiki without their
3137                  * knowledge, a random token is associated with the login
3138                  * session. If it's not passed back with the submission,
3139                  * we won't save the page, or render user JavaScript and
3140                  * CSS previews.
3141                  *
3142                  * For anon editors, who may not have a session, we just
3143                  * include the constant suffix to prevent editing from
3144                  * broken text-mangling proxies.
3145                  */
3146                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3147         }
3148
3149         /**
3150          * Subpage overridable method for printing the form for page content editing
3151          * By default this simply outputs wpTextbox1
3152          * Subclasses can override this to provide a custom UI for editing;
3153          * be it a form, or simply wpTextbox1 with a modified content that will be
3154          * reverse modified when extracted from the post data.
3155          * Note that this is basically the inverse for importContentFormData
3156          */
3157         protected function showContentForm() {
3158                 $this->showTextbox1();
3159         }
3160
3161         /**
3162          * Method to output wpTextbox1
3163          * The $textoverride method can be used by subclasses overriding showContentForm
3164          * to pass back to this method.
3165          *
3166          * @param array $customAttribs Array of html attributes to use in the textarea
3167          * @param string $textoverride Optional text to override $this->textarea1 with
3168          */
3169         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3170                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3171                         $attribs = [ 'style' => 'display:none;' ];
3172                 } else {
3173                         $classes = []; // Textarea CSS
3174                         if ( $this->mTitle->isProtected( 'edit' ) &&
3175                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3176                         ) {
3177                                 # Is the title semi-protected?
3178                                 if ( $this->mTitle->isSemiProtected() ) {
3179                                         $classes[] = 'mw-textarea-sprotected';
3180                                 } else {
3181                                         # Then it must be protected based on static groups (regular)
3182                                         $classes[] = 'mw-textarea-protected';
3183                                 }
3184                                 # Is the title cascade-protected?
3185                                 if ( $this->mTitle->isCascadeProtected() ) {
3186                                         $classes[] = 'mw-textarea-cprotected';
3187                                 }
3188                         }
3189                         # Is an old revision being edited?
3190                         if ( $this->isOldRev ) {
3191                                 $classes[] = 'mw-textarea-oldrev';
3192                         }
3193
3194                         $attribs = [ 'tabindex' => 1 ];
3195
3196                         if ( is_array( $customAttribs ) ) {
3197                                 $attribs += $customAttribs;
3198                         }
3199
3200                         if ( count( $classes ) ) {
3201                                 if ( isset( $attribs['class'] ) ) {
3202                                         $classes[] = $attribs['class'];
3203                                 }
3204                                 $attribs['class'] = implode( ' ', $classes );
3205                         }
3206                 }
3207
3208                 $this->showTextbox(
3209                         $textoverride !== null ? $textoverride : $this->textbox1,
3210                         'wpTextbox1',
3211                         $attribs
3212                 );
3213         }
3214
3215         protected function showTextbox2() {
3216                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3217         }
3218
3219         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3220                 global $wgOut, $wgUser;
3221
3222                 $wikitext = $this->safeUnicodeOutput( $text );
3223                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3224
3225                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $wgUser );
3226
3227                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3228         }
3229
3230         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3231                 global $wgOut;
3232                 $classes = [];
3233                 if ( $isOnTop ) {
3234                         $classes[] = 'ontop';
3235                 }
3236
3237                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3238
3239                 if ( $this->formtype != 'preview' ) {
3240                         $attribs['style'] = 'display: none;';
3241                 }
3242
3243                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3244
3245                 if ( $this->formtype == 'preview' ) {
3246                         $this->showPreview( $previewOutput );
3247                 } else {
3248                         // Empty content container for LivePreview
3249                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3250                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3251                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3252                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3253                 }
3254
3255                 $wgOut->addHTML( '</div>' );
3256
3257                 if ( $this->formtype == 'diff' ) {
3258                         try {
3259                                 $this->showDiff();
3260                         } catch ( MWContentSerializationException $ex ) {
3261                                 $msg = $this->context->msg(
3262                                         'content-failed-to-parse',
3263                                         $this->contentModel,
3264                                         $this->contentFormat,
3265                                         $ex->getMessage()
3266                                 );
3267                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3268                         }
3269                 }
3270         }
3271
3272         /**
3273          * Append preview output to $wgOut.
3274          * Includes category rendering if this is a category page.
3275          *
3276          * @param string $text The HTML to be output for the preview.
3277          */
3278         protected function showPreview( $text ) {
3279                 global $wgOut;
3280                 if ( $this->mArticle instanceof CategoryPage ) {
3281                         $this->mArticle->openShowCategory();
3282                 }
3283                 # This hook seems slightly odd here, but makes things more
3284                 # consistent for extensions.
3285                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3286                 $wgOut->addHTML( $text );
3287                 if ( $this->mArticle instanceof CategoryPage ) {
3288                         $this->mArticle->closeShowCategory();
3289                 }
3290         }
3291
3292         /**
3293          * Get a diff between the current contents of the edit box and the
3294          * version of the page we're editing from.
3295          *
3296          * If this is a section edit, we'll replace the section as for final
3297          * save and then make a comparison.
3298          */
3299         public function showDiff() {
3300                 global $wgUser, $wgContLang, $wgOut;
3301
3302                 $oldtitlemsg = 'currentrev';
3303                 # if message does not exist, show diff against the preloaded default
3304                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3305                         $oldtext = $this->mTitle->getDefaultMessageText();
3306                         if ( $oldtext !== false ) {
3307                                 $oldtitlemsg = 'defaultmessagetext';
3308                                 $oldContent = $this->toEditContent( $oldtext );
3309                         } else {
3310                                 $oldContent = null;
3311                         }
3312                 } else {
3313                         $oldContent = $this->getCurrentContent();
3314                 }
3315
3316                 $textboxContent = $this->toEditContent( $this->textbox1 );
3317                 if ( $this->editRevId !== null ) {
3318                         $newContent = $this->page->replaceSectionAtRev(
3319                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3320                         );
3321                 } else {
3322                         $newContent = $this->page->replaceSectionContent(
3323                                 $this->section, $textboxContent, $this->summary, $this->edittime
3324                         );
3325                 }
3326
3327                 if ( $newContent ) {
3328                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3329
3330                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3331                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3332                 }
3333
3334                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3335                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3336                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3337
3338                         if ( !$oldContent ) {
3339                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3340                         }
3341
3342                         if ( !$newContent ) {
3343                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3344                         }
3345
3346                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3347                         $de->setContent( $oldContent, $newContent );
3348
3349                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3350                         $de->showDiffStyle();
3351                 } else {
3352                         $difftext = '';
3353                 }
3354
3355                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3356         }
3357
3358         /**
3359          * Show the header copyright warning.
3360          */
3361         protected function showHeaderCopyrightWarning() {
3362                 $msg = 'editpage-head-copy-warn';
3363                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3364                         global $wgOut;
3365                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3366                                 'editpage-head-copy-warn' );
3367                 }
3368         }
3369
3370         /**
3371          * Give a chance for site and per-namespace customizations of
3372          * terms of service summary link that might exist separately
3373          * from the copyright notice.
3374          *
3375          * This will display between the save button and the edit tools,
3376          * so should remain short!
3377          */
3378         protected function showTosSummary() {
3379                 $msg = 'editpage-tos-summary';
3380                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3381                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3382                         global $wgOut;
3383                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3384                         $wgOut->addWikiMsg( $msg );
3385                         $wgOut->addHTML( '</div>' );
3386                 }
3387         }
3388
3389         protected function showEditTools() {
3390                 global $wgOut;
3391                 $wgOut->addHTML( '<div class="mw-editTools">' .
3392                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3393                         '</div>' );
3394         }
3395
3396         /**
3397          * Get the copyright warning
3398          *
3399          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3400          * @return string
3401          */
3402         protected function getCopywarn() {
3403                 return self::getCopyrightWarning( $this->mTitle );
3404         }
3405
3406         /**
3407          * Get the copyright warning, by default returns wikitext
3408          *
3409          * @param Title $title
3410          * @param string $format Output format, valid values are any function of a Message object
3411          * @param Language|string|null $langcode Language code or Language object.
3412          * @return string
3413          */
3414         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3415                 global $wgRightsText;
3416                 if ( $wgRightsText ) {
3417                         $copywarnMsg = [ 'copyrightwarning',
3418                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3419                                 $wgRightsText ];
3420                 } else {
3421                         $copywarnMsg = [ 'copyrightwarning2',
3422                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3423                 }
3424                 // Allow for site and per-namespace customization of contribution/copyright notice.
3425                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3426
3427                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3428                 if ( $langcode ) {
3429                         $msg->inLanguage( $langcode );
3430                 }
3431                 return "<div id=\"editpage-copywarn\">\n" .
3432                         $msg->$format() . "\n</div>";
3433         }
3434
3435         /**
3436          * Get the Limit report for page previews
3437          *
3438          * @since 1.22
3439          * @param ParserOutput $output ParserOutput object from the parse
3440          * @return string HTML
3441          */
3442         public static function getPreviewLimitReport( $output ) {
3443                 if ( !$output || !$output->getLimitReportData() ) {
3444                         return '';
3445                 }
3446
3447                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3448                         wfMessage( 'limitreport-title' )->parseAsBlock()
3449                 );
3450
3451                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3452                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3453
3454                 $limitReport .= Html::openElement( 'table', [
3455                         'class' => 'preview-limit-report wikitable'
3456                 ] ) .
3457                         Html::openElement( 'tbody' );
3458
3459                 foreach ( $output->getLimitReportData() as $key => $value ) {
3460                         if ( Hooks::run( 'ParserLimitReportFormat',
3461                                 [ $key, &$value, &$limitReport, true, true ]
3462                         ) ) {
3463                                 $keyMsg = wfMessage( $key );
3464                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3465                                 if ( !$valueMsg->exists() ) {
3466                                         $valueMsg = new RawMessage( '$1' );
3467                                 }
3468                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3469                                         $limitReport .= Html::openElement( 'tr' ) .
3470                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3471                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3472                                                 Html::closeElement( 'tr' );
3473                                 }
3474                         }
3475                 }
3476
3477                 $limitReport .= Html::closeElement( 'tbody' ) .
3478                         Html::closeElement( 'table' ) .
3479                         Html::closeElement( 'div' );
3480
3481                 return $limitReport;
3482         }
3483
3484         protected function showStandardInputs( &$tabindex = 2 ) {
3485                 global $wgOut;
3486                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3487
3488                 if ( $this->section != 'new' ) {
3489                         $this->showSummaryInput( false, $this->summary );
3490                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3491                 }
3492
3493                 $checkboxes = $this->getCheckboxes( $tabindex,
3494                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ] );
3495                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3496
3497                 // Show copyright warning.
3498                 $wgOut->addWikiText( $this->getCopywarn() );
3499                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3500
3501                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3502                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3503
3504                 $cancel = $this->getCancelLink();
3505                 if ( $cancel !== '' ) {
3506                         $cancel .= Html::element( 'span',
3507                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3508                                 $this->context->msg( 'pipe-separator' )->text() );
3509                 }
3510
3511                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3512                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3513                 $edithelp =
3514                         Html::linkButton(
3515                                 $this->context->msg( 'edithelp' )->text(),
3516                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3517                                 [ 'mw-ui-quiet' ]
3518                         ) .
3519                         $this->context->msg( 'word-separator' )->escaped() .
3520                         $this->context->msg( 'newwindow' )->parse();
3521
3522                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3523                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3524                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3525
3526                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3527
3528                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3529         }
3530
3531         /**
3532          * Show an edit conflict. textbox1 is already shown in showEditForm().
3533          * If you want to use another entry point to this function, be careful.
3534          */
3535         protected function showConflict() {
3536                 global $wgOut;
3537
3538                 // Avoid PHP 7.1 warning of passing $this by reference
3539                 $editPage = $this;
3540                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$wgOut ] ) ) {
3541                         $this->incrementConflictStats();
3542
3543                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3544
3545                         $content1 = $this->toEditContent( $this->textbox1 );
3546                         $content2 = $this->toEditContent( $this->textbox2 );
3547
3548                         $handler = ContentHandler::getForModelID( $this->contentModel );
3549                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3550                         $de->setContent( $content2, $content1 );
3551                         $de->showDiff(
3552                                 $this->context->msg( 'yourtext' )->parse(),
3553                                 $this->context->msg( 'storedversion' )->text()
3554                         );
3555
3556                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3557                         $this->showTextbox2();
3558                 }
3559         }
3560
3561         protected function incrementConflictStats() {
3562                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3563                 $stats->increment( 'edit.failures.conflict' );
3564                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3565                 if (
3566                         $this->mTitle->getNamespace() >= NS_MAIN &&
3567                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3568                 ) {
3569                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3570                 }
3571         }
3572
3573         /**
3574          * @return string
3575          */
3576         public function getCancelLink() {
3577                 $cancelParams = [];
3578                 if ( !$this->isConflict && $this->oldid > 0 ) {
3579                         $cancelParams['oldid'] = $this->oldid;
3580                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3581                         $cancelParams['redirect'] = 'no';
3582                 }
3583
3584                 return MediaWikiServices::getInstance()->getLinkRenderer()->makeKnownLink(
3585                         $this->getContextTitle(),
3586                         new HtmlArmor( $this->context->msg( 'cancel' )->parse() ),
3587                         Html::buttonAttributes( [ 'id' => 'mw-editform-cancel' ], [ 'mw-ui-quiet' ] ),
3588                         $cancelParams
3589                 );
3590         }
3591
3592         /**
3593          * Returns the URL to use in the form's action attribute.
3594          * This is used by EditPage subclasses when simply customizing the action
3595          * variable in the constructor is not enough. This can be used when the
3596          * EditPage lives inside of a Special page rather than a custom page action.
3597          *
3598          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3599          * @return string
3600          */
3601         protected function getActionURL( Title $title ) {
3602                 return $title->getLocalURL( [ 'action' => $this->action ] );
3603         }
3604
3605         /**
3606          * Check if a page was deleted while the user was editing it, before submit.
3607          * Note that we rely on the logging table, which hasn't been always there,
3608          * but that doesn't matter, because this only applies to brand new
3609          * deletes.
3610          * @return bool
3611          */
3612         protected function wasDeletedSinceLastEdit() {
3613                 if ( $this->deletedSinceEdit !== null ) {
3614                         return $this->deletedSinceEdit;
3615                 }
3616
3617                 $this->deletedSinceEdit = false;
3618
3619                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3620                         $this->lastDelete = $this->getLastDelete();
3621                         if ( $this->lastDelete ) {
3622                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3623                                 if ( $deleteTime > $this->starttime ) {
3624                                         $this->deletedSinceEdit = true;
3625                                 }
3626                         }
3627                 }
3628
3629                 return $this->deletedSinceEdit;
3630         }
3631
3632         /**
3633          * @return bool|stdClass
3634          */
3635         protected function getLastDelete() {
3636                 $dbr = wfGetDB( DB_REPLICA );
3637                 $data = $dbr->selectRow(
3638                         [ 'logging', 'user' ],
3639                         [
3640                                 'log_type',
3641                                 'log_action',
3642                                 'log_timestamp',
3643                                 'log_user',
3644                                 'log_namespace',
3645                                 'log_title',
3646                                 'log_comment',
3647                                 'log_params',
3648                                 'log_deleted',
3649                                 'user_name'
3650                         ], [
3651                                 'log_namespace' => $this->mTitle->getNamespace(),
3652                                 'log_title' => $this->mTitle->getDBkey(),
3653                                 'log_type' => 'delete',
3654                                 'log_action' => 'delete',
3655                                 'user_id=log_user'
3656                         ],
3657                         __METHOD__,
3658                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ]
3659                 );
3660                 // Quick paranoid permission checks...
3661                 if ( is_object( $data ) ) {
3662                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3663                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3664                         }
3665
3666                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3667                                 $data->log_comment = $this->context->msg( 'rev-deleted-comment' )->escaped();
3668                         }
3669                 }
3670
3671                 return $data;
3672         }
3673
3674         /**
3675          * Get the rendered text for previewing.
3676          * @throws MWException
3677          * @return string
3678          */
3679         public function getPreviewText() {
3680                 global $wgOut, $wgRawHtml, $wgLang;
3681                 global $wgAllowUserCss, $wgAllowUserJs;
3682
3683                 if ( $wgRawHtml && !$this->mTokenOk ) {
3684                         // Could be an offsite preview attempt. This is very unsafe if
3685                         // HTML is enabled, as it could be an attack.
3686                         $parsedNote = '';
3687                         if ( $this->textbox1 !== '' ) {
3688                                 // Do not put big scary notice, if previewing the empty
3689                                 // string, which happens when you initially edit
3690                                 // a category page, due to automatic preview-on-open.
3691                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3692                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3693                                         true, /* interface */true );
3694                         }
3695                         $this->incrementEditFailureStats( 'session_loss' );
3696                         return $parsedNote;
3697                 }
3698
3699                 $note = '';
3700
3701                 try {
3702                         $content = $this->toEditContent( $this->textbox1 );
3703
3704                         $previewHTML = '';
3705                         if ( !Hooks::run(
3706                                 'AlternateEditPreview',
3707                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3708                         ) {
3709                                 return $previewHTML;
3710                         }
3711
3712                         # provide a anchor link to the editform
3713                         $continueEditing = '<span class="mw-continue-editing">' .
3714                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3715                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3716                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3717                                 if ( $this->mTokenOkExceptSuffix ) {
3718                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3719                                         $this->incrementEditFailureStats( 'bad_token' );
3720                                 } else {
3721                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3722                                         $this->incrementEditFailureStats( 'session_loss' );
3723                                 }
3724                         } elseif ( $this->incompleteForm ) {
3725                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3726                                 if ( $this->mTriedSave ) {
3727                                         $this->incrementEditFailureStats( 'incomplete_form' );
3728                                 }
3729                         } else {
3730                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3731                         }
3732
3733                         # don't parse non-wikitext pages, show message about preview
3734                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3735                                 if ( $this->mTitle->isCssJsSubpage() ) {
3736                                         $level = 'user';
3737                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3738                                         $level = 'site';
3739                                 } else {
3740                                         $level = false;
3741                                 }
3742
3743                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3744                                         $format = 'css';
3745                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3746                                                 $format = false;
3747                                         }
3748                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3749                                         $format = 'js';
3750                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3751                                                 $format = false;
3752                                         }
3753                                 } else {
3754                                         $format = false;
3755                                 }
3756
3757                                 # Used messages to make sure grep find them:
3758                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3759                                 if ( $level && $format ) {
3760                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3761                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3762                                                 ' ' . $continueEditing . "</div>";
3763                                 }
3764                         }
3765
3766                         # If we're adding a comment, we need to show the
3767                         # summary as the headline
3768                         if ( $this->section === "new" && $this->summary !== "" ) {
3769                                 $content = $content->addSectionHeader( $this->summary );
3770                         }
3771
3772                         $hook_args = [ $this, &$content ];
3773                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3774
3775                         $parserResult = $this->doPreviewParse( $content );
3776                         $parserOutput = $parserResult['parserOutput'];
3777                         $previewHTML = $parserResult['html'];
3778                         $this->mParserOutput = $parserOutput;
3779                         $wgOut->addParserOutputMetadata( $parserOutput );
3780
3781                         if ( count( $parserOutput->getWarnings() ) ) {
3782                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3783                         }
3784
3785                 } catch ( MWContentSerializationException $ex ) {
3786                         $m = $this->context->msg(
3787                                 'content-failed-to-parse',
3788                                 $this->contentModel,
3789                                 $this->contentFormat,
3790                                 $ex->getMessage()
3791                         );
3792                         $note .= "\n\n" . $m->parse();
3793                         $previewHTML = '';
3794                 }
3795
3796                 if ( $this->isConflict ) {
3797                         $conflict = '<h2 id="mw-previewconflict">'
3798                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3799                 } else {
3800                         $conflict = '<hr />';
3801                 }
3802
3803                 $previewhead = "<div class='previewnote'>\n" .
3804                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3805                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3806
3807                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3808                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3809                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3810                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3811
3812                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3813         }
3814
3815         private function incrementEditFailureStats( $failureType ) {
3816                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3817                 $stats->increment( 'edit.failures.' . $failureType );
3818         }
3819
3820         /**
3821          * Get parser options for a preview
3822          * @return ParserOptions
3823          */
3824         protected function getPreviewParserOptions() {
3825                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3826                 $parserOptions->setIsPreview( true );
3827                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3828                 $parserOptions->enableLimitReport();
3829                 return $parserOptions;
3830         }
3831
3832         /**
3833          * Parse the page for a preview. Subclasses may override this class, in order
3834          * to parse with different options, or to otherwise modify the preview HTML.
3835          *
3836          * @param Content $content The page content
3837          * @return array with keys:
3838          *   - parserOutput: The ParserOutput object
3839          *   - html: The HTML to be displayed
3840          */
3841         protected function doPreviewParse( Content $content ) {
3842                 global $wgUser;
3843                 $parserOptions = $this->getPreviewParserOptions();
3844                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3845                 $scopedCallback = $parserOptions->setupFakeRevision(
3846                         $this->mTitle, $pstContent, $wgUser );
3847                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3848                 ScopedCallback::consume( $scopedCallback );
3849                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3850                 return [
3851                         'parserOutput' => $parserOutput,
3852                         'html' => $parserOutput->getText() ];
3853         }
3854
3855         /**
3856          * @return array
3857          */
3858         public function getTemplates() {
3859                 if ( $this->preview || $this->section != '' ) {
3860                         $templates = [];
3861                         if ( !isset( $this->mParserOutput ) ) {
3862                                 return $templates;
3863                         }
3864                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3865                                 foreach ( array_keys( $template ) as $dbk ) {
3866                                         $templates[] = Title::makeTitle( $ns, $dbk );
3867                                 }
3868                         }
3869                         return $templates;
3870                 } else {
3871                         return $this->mTitle->getTemplateLinksFrom();
3872                 }
3873         }
3874
3875         /**
3876          * Shows a bulletin board style toolbar for common editing functions.
3877          * It can be disabled in the user preferences.
3878          *
3879          * @param Title $title Title object for the page being edited (optional)
3880          * @return string
3881          */
3882         public static function getEditToolbar( $title = null ) {
3883                 global $wgContLang, $wgOut;
3884                 global $wgEnableUploads, $wgForeignFileRepos;
3885
3886                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3887                 $showSignature = true;
3888                 if ( $title ) {
3889                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3890                 }
3891
3892                 /**
3893                  * $toolarray is an array of arrays each of which includes the
3894                  * opening tag, the closing tag, optionally a sample text that is
3895                  * inserted between the two when no selection is highlighted
3896                  * and.  The tip text is shown when the user moves the mouse
3897                  * over the button.
3898                  *
3899                  * Images are defined in ResourceLoaderEditToolbarModule.
3900                  */
3901                 $toolarray = [
3902                         [
3903                                 'id'     => 'mw-editbutton-bold',
3904                                 'open'   => '\'\'\'',
3905                                 'close'  => '\'\'\'',
3906                                 'sample' => wfMessage( 'bold_sample' )->text(),
3907                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3908                         ],
3909                         [
3910                                 'id'     => 'mw-editbutton-italic',
3911                                 'open'   => '\'\'',
3912                                 'close'  => '\'\'',
3913                                 'sample' => wfMessage( 'italic_sample' )->text(),
3914                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3915                         ],
3916                         [
3917                                 'id'     => 'mw-editbutton-link',
3918                                 'open'   => '[[',
3919                                 'close'  => ']]',
3920                                 'sample' => wfMessage( 'link_sample' )->text(),
3921                                 'tip'    => wfMessage( 'link_tip' )->text(),
3922                         ],
3923                         [
3924                                 'id'     => 'mw-editbutton-extlink',
3925                                 'open'   => '[',
3926                                 'close'  => ']',
3927                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3928                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3929                         ],
3930                         [
3931                                 'id'     => 'mw-editbutton-headline',
3932                                 'open'   => "\n== ",
3933                                 'close'  => " ==\n",
3934                                 'sample' => wfMessage( 'headline_sample' )->text(),
3935                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3936                         ],
3937                         $imagesAvailable ? [
3938                                 'id'     => 'mw-editbutton-image',
3939                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3940                                 'close'  => ']]',
3941                                 'sample' => wfMessage( 'image_sample' )->text(),
3942                                 'tip'    => wfMessage( 'image_tip' )->text(),
3943                         ] : false,
3944                         $imagesAvailable ? [
3945                                 'id'     => 'mw-editbutton-media',
3946                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3947                                 'close'  => ']]',
3948                                 'sample' => wfMessage( 'media_sample' )->text(),
3949                                 'tip'    => wfMessage( 'media_tip' )->text(),
3950                         ] : false,
3951                         [
3952                                 'id'     => 'mw-editbutton-nowiki',
3953                                 'open'   => "<nowiki>",
3954                                 'close'  => "</nowiki>",
3955                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3956                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3957                         ],
3958                         $showSignature ? [
3959                                 'id'     => 'mw-editbutton-signature',
3960                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
3961                                 'close'  => '',
3962                                 'sample' => '',
3963                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3964                         ] : false,
3965                         [
3966                                 'id'     => 'mw-editbutton-hr',
3967                                 'open'   => "\n----\n",
3968                                 'close'  => '',
3969                                 'sample' => '',
3970                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3971                         ]
3972                 ];
3973
3974                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3975                 foreach ( $toolarray as $tool ) {
3976                         if ( !$tool ) {
3977                                 continue;
3978                         }
3979
3980                         $params = [
3981                                 // Images are defined in ResourceLoaderEditToolbarModule
3982                                 false,
3983                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3984                                 // Older browsers show a "speedtip" type message only for ALT.
3985                                 // Ideally these should be different, realistically they
3986                                 // probably don't need to be.
3987                                 $tool['tip'],
3988                                 $tool['open'],
3989                                 $tool['close'],
3990                                 $tool['sample'],
3991                                 $tool['id'],
3992                         ];
3993
3994                         $script .= Xml::encodeJsCall(
3995                                 'mw.toolbar.addButton',
3996                                 $params,
3997                                 ResourceLoader::inDebugMode()
3998                         );
3999                 }
4000
4001                 $script .= '});';
4002                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4003
4004                 $toolbar = '<div id="toolbar"></div>';
4005
4006                 Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] );
4007
4008                 return $toolbar;
4009         }
4010
4011         /**
4012          * Return an array of checkbox definitions.
4013          *
4014          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4015          *
4016          * Array values are associative arrays with the following keys:
4017          *  - 'label-message' (required): message for label text
4018          *  - 'id' (required): 'id' attribute for the `<input>`
4019          *  - 'default' (required): default checkedness (true or false)
4020          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4021          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4022          *    from messages like 'tooltip-foo', 'accesskey-foo'
4023          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4024          *  - 'legacy-name' (optional): short name for backwards-compatibility
4025          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4026          *   where bool indicates the checked status of the checkbox
4027          * @return array
4028          */
4029         protected function getCheckboxesDefinition( $checked ) {
4030                 global $wgUser;
4031                 $checkboxes = [];
4032
4033                 // don't show the minor edit checkbox if it's a new page or section
4034                 if ( !$this->isNew && $wgUser->isAllowed( 'minoredit' ) ) {
4035                         $checkboxes['wpMinoredit'] = [
4036                                 'id' => 'wpMinoredit',
4037                                 'label-message' => 'minoredit',
4038                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4039                                 'tooltip' => 'minoredit',
4040                                 'label-id' => 'mw-editpage-minoredit',
4041                                 'legacy-name' => 'minor',
4042                                 'default' => $checked['minor'],
4043                         ];
4044                 }
4045
4046                 if ( $wgUser->isLoggedIn() ) {
4047                         $checkboxes['wpWatchthis'] = [
4048                                 'id' => 'wpWatchthis',
4049                                 'label-message' => 'watchthis',
4050                                 // Uses messages: tooltip-watch, accesskey-watch
4051                                 'tooltip' => 'watch',
4052                                 'label-id' => 'mw-editpage-watch',
4053                                 'legacy-name' => 'watch',
4054                                 'default' => $checked['watch'],
4055                         ];
4056                 }
4057
4058                 $editPage = $this;
4059                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4060
4061                 return $checkboxes;
4062         }
4063
4064         /**
4065          * Returns an array of html code of the following checkboxes:
4066          * minor and watch
4067          *
4068          * @param int $tabindex Current tabindex
4069          * @param array $checked See getCheckboxesDefinition()
4070          * @return array
4071          */
4072         public function getCheckboxes( &$tabindex, $checked ) {
4073                 global $wgUseMediaWikiUIEverywhere;
4074
4075                 $checkboxes = [];
4076                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4077
4078                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4079                 if ( !$this->isNew ) {
4080                         $checkboxes['minor'] = '';
4081                 }
4082                 $checkboxes['watch'] = '';
4083
4084                 foreach ( $checkboxesDef as $name => $options ) {
4085                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4086                         $label = $this->context->msg( $options['label-message'] )->parse();
4087                         $attribs = [
4088                                 'tabindex' => ++$tabindex,
4089                                 'id' => $options['id'],
4090                         ];
4091                         $labelAttribs = [
4092                                 'for' => $options['id'],
4093                         ];
4094                         if ( isset( $options['tooltip'] ) ) {
4095                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4096                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4097                         }
4098                         if ( isset( $options['title-message'] ) ) {
4099                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4100                         }
4101                         if ( isset( $options['label-id'] ) ) {
4102                                 $labelAttribs['id'] = $options['label-id'];
4103                         }
4104                         $checkboxHtml =
4105                                 Xml::check( $name, $options['default'], $attribs ) .
4106                                 '&#160;' .
4107                                 Xml::tags( 'label', $labelAttribs, $label );
4108
4109                         if ( $wgUseMediaWikiUIEverywhere ) {
4110                                 $checkboxHtml = Html::rawElement( 'div', [ 'class' => 'mw-ui-checkbox' ], $checkboxHtml );
4111                         }
4112
4113                         $checkboxes[ $legacyName ] = $checkboxHtml;
4114                 }
4115
4116                 // Avoid PHP 7.1 warning of passing $this by reference
4117                 $editPage = $this;
4118                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4119                 return $checkboxes;
4120         }
4121
4122         /**
4123          * Returns an array of html code of the following buttons:
4124          * save, diff and preview
4125          *
4126          * @param int $tabindex Current tabindex
4127          *
4128          * @return array
4129          */
4130         public function getEditButtons( &$tabindex ) {
4131                 $buttons = [];
4132
4133                 $labelAsPublish =
4134                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4135
4136                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4137                 if ( $labelAsPublish ) {
4138                         $buttonLabelKey = !$this->mTitle->exists() ? 'publishpage' : 'publishchanges';
4139                 } else {
4140                         $buttonLabelKey = !$this->mTitle->exists() ? 'savearticle' : 'savechanges';
4141                 }
4142                 $attribs = [
4143                         'id' => 'wpSave',
4144                         'name' => 'wpSave',
4145                         'tabindex' => ++$tabindex,
4146                 ] + Linker::tooltipAndAccesskeyAttribs( 'save' );
4147                 $buttons['save'] = Html::submitButton(
4148                         $this->context->msg( $buttonLabelKey )->text(),
4149                         $attribs,
4150                         [ 'mw-ui-progressive' ]
4151                 );
4152
4153                 $attribs = [
4154                         'id' => 'wpPreview',
4155                         'name' => 'wpPreview',
4156                         'tabindex' => ++$tabindex,
4157                 ] + Linker::tooltipAndAccesskeyAttribs( 'preview' );
4158                 $buttons['preview'] = Html::submitButton(
4159                         $this->context->msg( 'showpreview' )->text(),
4160                         $attribs
4161                 );
4162
4163                 $attribs = [
4164                         'id' => 'wpDiff',
4165                         'name' => 'wpDiff',
4166                         'tabindex' => ++$tabindex,
4167                 ] + Linker::tooltipAndAccesskeyAttribs( 'diff' );
4168                 $buttons['diff'] = Html::submitButton(
4169                         $this->context->msg( 'showdiff' )->text(),
4170                         $attribs
4171                 );
4172
4173                 // Avoid PHP 7.1 warning of passing $this by reference
4174                 $editPage = $this;
4175                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4176
4177                 return $buttons;
4178         }
4179
4180         /**
4181          * Creates a basic error page which informs the user that
4182          * they have attempted to edit a nonexistent section.
4183          */
4184         public function noSuchSectionPage() {
4185                 global $wgOut;
4186
4187                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4188
4189                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4190
4191                 // Avoid PHP 7.1 warning of passing $this by reference
4192                 $editPage = $this;
4193                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4194                 $wgOut->addHTML( $res );
4195
4196                 $wgOut->returnToMain( false, $this->mTitle );
4197         }
4198
4199         /**
4200          * Show "your edit contains spam" page with your diff and text
4201          *
4202          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4203          */
4204         public function spamPageWithContent( $match = false ) {
4205                 global $wgOut, $wgLang;
4206                 $this->textbox2 = $this->textbox1;
4207
4208                 if ( is_array( $match ) ) {
4209                         $match = $wgLang->listToText( $match );
4210                 }
4211                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4212
4213                 $wgOut->addHTML( '<div id="spamprotected">' );
4214                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4215                 if ( $match ) {
4216                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4217                 }
4218                 $wgOut->addHTML( '</div>' );
4219
4220                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4221                 $this->showDiff();
4222
4223                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4224                 $this->showTextbox2();
4225
4226                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4227         }
4228
4229         /**
4230          * Check if the browser is on a blacklist of user-agents known to
4231          * mangle UTF-8 data on form submission. Returns true if Unicode
4232          * should make it through, false if it's known to be a problem.
4233          * @return bool
4234          */
4235         private function checkUnicodeCompliantBrowser() {
4236                 global $wgBrowserBlackList, $wgRequest;
4237
4238                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4239                 if ( $currentbrowser === false ) {
4240                         // No User-Agent header sent? Trust it by default...
4241                         return true;
4242                 }
4243
4244                 foreach ( $wgBrowserBlackList as $browser ) {
4245                         if ( preg_match( $browser, $currentbrowser ) ) {
4246                                 return false;
4247                         }
4248                 }
4249                 return true;
4250         }
4251
4252         /**
4253          * Filter an input field through a Unicode de-armoring process if it
4254          * came from an old browser with known broken Unicode editing issues.
4255          *
4256          * @param WebRequest $request
4257          * @param string $field
4258          * @return string
4259          */
4260         protected function safeUnicodeInput( $request, $field ) {
4261                 $text = rtrim( $request->getText( $field ) );
4262                 return $request->getBool( 'safemode' )
4263                         ? $this->unmakeSafe( $text )
4264                         : $text;
4265         }
4266
4267         /**
4268          * Filter an output field through a Unicode armoring process if it is
4269          * going to an old browser with known broken Unicode editing issues.
4270          *
4271          * @param string $text
4272          * @return string
4273          */
4274         protected function safeUnicodeOutput( $text ) {
4275                 return $this->checkUnicodeCompliantBrowser()
4276                         ? $text
4277                         : $this->makeSafe( $text );
4278         }
4279
4280         /**
4281          * A number of web browsers are known to corrupt non-ASCII characters
4282          * in a UTF-8 text editing environment. To protect against this,
4283          * detected browsers will be served an armored version of the text,
4284          * with non-ASCII chars converted to numeric HTML character references.
4285          *
4286          * Preexisting such character references will have a 0 added to them
4287          * to ensure that round-trips do not alter the original data.
4288          *
4289          * @param string $invalue
4290          * @return string
4291          */
4292         private function makeSafe( $invalue ) {
4293                 // Armor existing references for reversibility.
4294                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4295
4296                 $bytesleft = 0;
4297                 $result = "";
4298                 $working = 0;
4299                 $valueLength = strlen( $invalue );
4300                 for ( $i = 0; $i < $valueLength; $i++ ) {
4301                         $bytevalue = ord( $invalue[$i] );
4302                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4303                                 $result .= chr( $bytevalue );
4304                                 $bytesleft = 0;
4305                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4306                                 $working = $working << 6;
4307                                 $working += ( $bytevalue & 0x3F );
4308                                 $bytesleft--;
4309                                 if ( $bytesleft <= 0 ) {
4310                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4311                                 }
4312                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4313                                 $working = $bytevalue & 0x1F;
4314                                 $bytesleft = 1;
4315                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4316                                 $working = $bytevalue & 0x0F;
4317                                 $bytesleft = 2;
4318                         } else { // 1111 0xxx
4319                                 $working = $bytevalue & 0x07;
4320                                 $bytesleft = 3;
4321                         }
4322                 }
4323                 return $result;
4324         }
4325
4326         /**
4327          * Reverse the previously applied transliteration of non-ASCII characters
4328          * back to UTF-8. Used to protect data from corruption by broken web browsers
4329          * as listed in $wgBrowserBlackList.
4330          *
4331          * @param string $invalue
4332          * @return string
4333          */
4334         private function unmakeSafe( $invalue ) {
4335                 $result = "";
4336                 $valueLength = strlen( $invalue );
4337                 for ( $i = 0; $i < $valueLength; $i++ ) {
4338                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4339                                 $i += 3;
4340                                 $hexstring = "";
4341                                 do {
4342                                         $hexstring .= $invalue[$i];
4343                                         $i++;
4344                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4345
4346                                 // Do some sanity checks. These aren't needed for reversibility,
4347                                 // but should help keep the breakage down if the editor
4348                                 // breaks one of the entities whilst editing.
4349                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4350                                         $codepoint = hexdec( $hexstring );
4351                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4352                                 } else {
4353                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4354                                 }
4355                         } else {
4356                                 $result .= substr( $invalue, $i, 1 );
4357                         }
4358                 }
4359                 // reverse the transform that we made for reversibility reasons.
4360                 return strtr( $result, [ "&#x0" => "&#x" ] );
4361         }
4362
4363         /**
4364          * @since 1.29
4365          */
4366         protected function addEditNotices() {
4367                 global $wgOut;
4368
4369                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4370                 if ( count( $editNotices ) ) {
4371                         $wgOut->addHTML( implode( "\n", $editNotices ) );
4372                 } else {
4373                         $msg = $this->context->msg( 'editnotice-notext' );
4374                         if ( !$msg->isDisabled() ) {
4375                                 $wgOut->addHTML(
4376                                         '<div class="mw-editnotice-notext">'
4377                                         . $msg->parseAsBlock()
4378                                         . '</div>'
4379                                 );
4380                         }
4381                 }
4382         }
4383
4384         /**
4385          * @since 1.29
4386          */
4387         protected function addTalkPageText() {
4388                 global $wgOut;
4389
4390                 if ( $this->mTitle->isTalkPage() ) {
4391                         $wgOut->addWikiMsg( 'talkpagetext' );
4392                 }
4393         }
4394
4395         /**
4396          * @since 1.29
4397          */
4398         protected function addLongPageWarningHeader() {
4399                 global $wgMaxArticleSize, $wgOut, $wgLang;
4400
4401                 if ( $this->contentLength === false ) {
4402                         $this->contentLength = strlen( $this->textbox1 );
4403                 }
4404
4405                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4406                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4407                                 [
4408                                         'longpageerror',
4409                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4410                                         $wgLang->formatNum( $wgMaxArticleSize )
4411                                 ]
4412                         );
4413                 } else {
4414                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4415                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4416                                         [
4417                                                 'longpage-hint',
4418                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4419                                                 strlen( $this->textbox1 )
4420                                         ]
4421                                 );
4422                         }
4423                 }
4424         }
4425
4426         /**
4427          * @since 1.29
4428          */
4429         protected function addPageProtectionWarningHeaders() {
4430                 global $wgOut;
4431
4432                 if ( $this->mTitle->isProtected( 'edit' ) &&
4433                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4434                 ) {
4435                         # Is the title semi-protected?
4436                         if ( $this->mTitle->isSemiProtected() ) {
4437                                 $noticeMsg = 'semiprotectedpagewarning';
4438                         } else {
4439                                 # Then it must be protected based on static groups (regular)
4440                                 $noticeMsg = 'protectedpagewarning';
4441                         }
4442                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4443                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4444                 }
4445                 if ( $this->mTitle->isCascadeProtected() ) {
4446                         # Is this page under cascading protection from some source pages?
4447                         /** @var Title[] $cascadeSources */
4448                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4449                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4450                         $cascadeSourcesCount = count( $cascadeSources );
4451                         if ( $cascadeSourcesCount > 0 ) {
4452                                 # Explain, and list the titles responsible
4453                                 foreach ( $cascadeSources as $page ) {
4454                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4455                                 }
4456                         }
4457                         $notice .= '</div>';
4458                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4459                 }
4460                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4461                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4462                                 [ 'lim' => 1,
4463                                         'showIfEmpty' => false,
4464                                         'msgKey' => [ 'titleprotectedwarning' ],
4465                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4466                 }
4467         }
4468
4469         /**
4470          * @param OutputPage $out
4471          * @since 1.29
4472          */
4473         protected function addExplainConflictHeader( OutputPage $out ) {
4474                 $out->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
4475         }
4476
4477         /**
4478          * @param string $name
4479          * @param mixed[] $customAttribs
4480          * @param User $user
4481          * @return mixed[]
4482          * @since 1.29
4483          */
4484         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4485                 $attribs = $customAttribs + [
4486                                 'accesskey' => ',',
4487                                 'id' => $name,
4488                                 'cols' => 80,
4489                                 'rows' => 25,
4490                                 // Avoid PHP notices when appending preferences
4491                                 // (appending allows customAttribs['style'] to still work).
4492                                 'style' => ''
4493                         ];
4494
4495                 // The following classes can be used here:
4496                 // * mw-editfont-default
4497                 // * mw-editfont-monospace
4498                 // * mw-editfont-sans-serif
4499                 // * mw-editfont-serif
4500                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4501
4502                 if ( isset( $attribs['class'] ) ) {
4503                         if ( is_string( $attribs['class'] ) ) {
4504                                 $attribs['class'] .= ' ' . $class;
4505                         } elseif ( is_array( $attribs['class'] ) ) {
4506                                 $attribs['class'][] = $class;
4507                         }
4508                 } else {
4509                         $attribs['class'] = $class;
4510                 }
4511
4512                 $pageLang = $this->mTitle->getPageLanguage();
4513                 $attribs['lang'] = $pageLang->getHtmlCode();
4514                 $attribs['dir'] = $pageLang->getDir();
4515
4516                 return $attribs;
4517         }
4518
4519         /**
4520          * @param string $wikitext
4521          * @return string
4522          * @since 1.29
4523          */
4524         protected function addNewLineAtEnd( $wikitext ) {
4525                 if ( strval( $wikitext ) !== '' ) {
4526                         // Ensure there's a newline at the end, otherwise adding lines
4527                         // is awkward.
4528                         // But don't add a newline if the text is empty, or Firefox in XHTML
4529                         // mode will show an extra newline. A bit annoying.
4530                         $wikitext .= "\n";
4531                         return $wikitext;
4532                 }
4533                 return $wikitext;
4534         }
4535 }