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 null|string */
 367         public $contentModel = null;
 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         function submit() {
 502                 $this->edit();
 503         }
 504
 505         /**
 506          * This is the function that gets called for "action=edit". It
 507          * sets up various member variables, then passes execution to
 508          * another function, usually showEditForm()
 509          *
 510          * The edit form is self-submitting, so that when things like
 511          * preview and edit conflicts occur, we get the same form back
 512          * with the extra stuff added.  Only when the final submission
 513          * is made and all is well do we actually save and redirect to
 514          * the newly-edited page.
 515          */
 516         function edit() {
 517                 global $wgOut, $wgRequest, $wgUser;
 518                 // Allow extensions to modify/prevent this form or submission
 519                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 520                         return;
 521                 }
 522
 523                 wfDebug( __METHOD__ . ": enter\n" );
 524
 525                 // If they used redlink=1 and the page exists, redirect to the main article
 526                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 527                         $wgOut->redirect( $this->mTitle->getFullURL() );
 528                         return;
 529                 }
 530
 531                 $this->importFormData( $wgRequest );
 532                 $this->firsttime = false;
 533
 534                 if ( wfReadOnly() && $this->save ) {
 535                         // Force preview
 536                         $this->save = false;
 537                         $this->preview = true;
 538                 }
 539
 540                 if ( $this->save ) {
 541                         $this->formtype = 'save';
 542                 } elseif ( $this->preview ) {
 543                         $this->formtype = 'preview';
 544                 } elseif ( $this->diff ) {
 545                         $this->formtype = 'diff';
 546                 } else { # First time through
 547                         $this->firsttime = true;
 548                         if ( $this->previewOnOpen() ) {
 549                                 $this->formtype = 'preview';
 550                         } else {
 551                                 $this->formtype = 'initial';
 552                         }
 553                 }
 554
 555                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 556                 if ( $permErrors ) {
 557                         wfDebug( __METHOD__ . ": User can't edit\n" );
 558                         // Auto-block user's IP if the account was "hard" blocked
 559                         if ( !wfReadOnly() ) {
 560                                 $user = $wgUser;
 561                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 562                                         $user->spreadAnyEditBlock();
 563                                 } );
 564                         }
 565                         $this->displayPermissionsError( $permErrors );
 566
 567                         return;
 568                 }
 569
 570                 $revision = $this->mArticle->getRevisionFetched();
 571                 // Disallow editing revisions with content models different from the current one
 572                 // Undo edits being an exception in order to allow reverting content model changes.
 573                 if ( $revision
 574                         && $revision->getContentModel() !== $this->contentModel
 575                 ) {
 576                         $prevRev = null;
 577                         if ( $this->undidRev ) {
 578                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 579                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 580                         }
 581                         if ( !$this->undidRev
 582                                 || !$prevRev
 583                                 || $prevRev->getContentModel() !== $this->contentModel
 584                         ) {
 585                                 $this->displayViewSourcePage(
 586                                         $this->getContentObject(),
 587                                         $this->context->msg(
 588                                                 'contentmodelediterror',
 589                                                 $revision->getContentModel(),
 590                                                 $this->contentModel
 591                                         )->plain()
 592                                 );
 593                                 return;
 594                         }
 595                 }
 596
 597                 $this->isConflict = false;
 598                 // css / js subpages of user pages get a special treatment
 599                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 600                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 601                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 602                 // @todo FIXME: Silly assignment.
 603                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 604
 605                 # Show applicable editing introductions
 606                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 607                         $this->showIntro();
 608                 }
 609
 610                 # Attempt submission here.  This will check for edit conflicts,
 611                 # and redundantly check for locked database, blocked IPs, etc.
 612                 # that edit() already checked just in case someone tries to sneak
 613                 # in the back door with a hand-edited submission URL.
 614
 615                 if ( 'save' == $this->formtype ) {
 616                         $resultDetails = null;
 617                         $status = $this->attemptSave( $resultDetails );
 618                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 619                                 return;
 620                         }
 621                 }
 622
 623                 # First time through: get contents, set time for conflict
 624                 # checking, etc.
 625                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 626                         if ( $this->initialiseForm() === false ) {
 627                                 $this->noSuchSectionPage();
 628                                 return;
 629                         }
 630
 631                         if ( !$this->mTitle->getArticleID() ) {
 632                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 633                         } else {
 634                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 635                         }
 636
 637                 }
 638
 639                 $this->showEditForm();
 640         }
 641
 642         /**
 643          * @param string $rigor Same format as Title::getUserPermissionErrors()
 644          * @return array
 645          */
 646         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 647                 global $wgUser;
 648
 649                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 650                 # Can this title be created?
 651                 if ( !$this->mTitle->exists() ) {
 652                         $permErrors = array_merge(
 653                                 $permErrors,
 654                                 wfArrayDiff2(
 655                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 656                                         $permErrors
 657                                 )
 658                         );
 659                 }
 660                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 661                 $remove = [];
 662                 foreach ( $permErrors as $error ) {
 663                         if ( ( $this->preview || $this->diff )
 664                                 && (
 665                                         $error[0] == 'blockedtext' ||
 666                                         $error[0] == 'autoblockedtext' ||
 667                                         $error[0] == 'systemblockedtext'
 668                                 )
 669                         ) {
 670                                 $remove[] = $error;
 671                         }
 672                 }
 673                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 674
 675                 return $permErrors;
 676         }
 677
 678         /**
 679          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 680          * but with the following differences:
 681          * - If redlink=1, the user will be redirected to the page
 682          * - If there is content to display or the error occurs while either saving,
 683          *   previewing or showing the difference, it will be a
 684          *   "View source for ..." page displaying the source code after the error message.
 685          *
 686          * @since 1.19
 687          * @param array $permErrors Array of permissions errors, as returned by
 688          *    Title::getUserPermissionsErrors().
 689          * @throws PermissionsError
 690          */
 691         protected function displayPermissionsError( array $permErrors ) {
 692                 global $wgRequest, $wgOut;
 693
 694                 if ( $wgRequest->getBool( 'redlink' ) ) {
 695                         // The edit page was reached via a red link.
 696                         // Redirect to the article page and let them click the edit tab if
 697                         // they really want a permission error.
 698                         $wgOut->redirect( $this->mTitle->getFullURL() );
 699                         return;
 700                 }
 701
 702                 $content = $this->getContentObject();
 703
 704                 # Use the normal message if there's nothing to display
 705                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 706                         $action = $this->mTitle->exists() ? 'edit' :
 707                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 708                         throw new PermissionsError( $action, $permErrors );
 709                 }
 710
 711                 $this->displayViewSourcePage(
 712                         $content,
 713                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 714                 );
 715         }
 716
 717         /**
 718          * Display a read-only View Source page
 719          * @param Content $content content object
 720          * @param string $errorMessage additional wikitext error message to display
 721          */
 722         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 723                 global $wgOut;
 724
 725                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 726
 727                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 728                 $wgOut->setPageTitle( $this->context->msg(
 729                         'viewsource-title',
 730                         $this->getContextTitle()->getPrefixedText()
 731                 ) );
 732                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 733                 $wgOut->addHTML( $this->editFormPageTop );
 734                 $wgOut->addHTML( $this->editFormTextTop );
 735
 736                 if ( $errorMessage !== '' ) {
 737                         $wgOut->addWikiText( $errorMessage );
 738                         $wgOut->addHTML( "<hr />\n" );
 739                 }
 740
 741                 # If the user made changes, preserve them when showing the markup
 742                 # (This happens when a user is blocked during edit, for instance)
 743                 if ( !$this->firsttime ) {
 744                         $text = $this->textbox1;
 745                         $wgOut->addWikiMsg( 'viewyourtext' );
 746                 } else {
 747                         try {
 748                                 $text = $this->toEditText( $content );
 749                         } catch ( MWException $e ) {
 750                                 # Serialize using the default format if the content model is not supported
 751                                 # (e.g. for an old revision with a different model)
 752                                 $text = $content->serialize();
 753                         }
 754                         $wgOut->addWikiMsg( 'viewsourcetext' );
 755                 }
 756
 757                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 758                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 759                 $wgOut->addHTML( $this->editFormTextAfterContent );
 760
 761                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 762
 763                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 764
 765                 $wgOut->addHTML( $this->editFormTextBottom );
 766                 if ( $this->mTitle->exists() ) {
 767                         $wgOut->returnToMain( null, $this->mTitle );
 768                 }
 769         }
 770
 771         /**
 772          * Should we show a preview when the edit form is first shown?
 773          *
 774          * @return bool
 775          */
 776         protected function previewOnOpen() {
 777                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 778                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 779                         // Explicit override from request
 780                         return true;
 781                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 782                         // Explicit override from request
 783                         return false;
 784                 } elseif ( $this->section == 'new' ) {
 785                         // Nothing *to* preview for new sections
 786                         return false;
 787                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 788                         && $wgUser->getOption( 'previewonfirst' )
 789                 ) {
 790                         // Standard preference behavior
 791                         return true;
 792                 } elseif ( !$this->mTitle->exists()
 793                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 794                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 795                 ) {
 796                         // Categories are special
 797                         return true;
 798                 } else {
 799                         return false;
 800                 }
 801         }
 802
 803         /**
 804          * Checks whether the user entered a skin name in uppercase,
 805          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 806          *
 807          * @return bool
 808          */
 809         protected function isWrongCaseCssJsPage() {
 810                 if ( $this->mTitle->isCssJsSubpage() ) {
 811                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 812                         $skins = array_merge(
 813                                 array_keys( Skin::getSkinNames() ),
 814                                 [ 'common' ]
 815                         );
 816                         return !in_array( $name, $skins )
 817                                 && in_array( strtolower( $name ), $skins );
 818                 } else {
 819                         return false;
 820                 }
 821         }
 822
 823         /**
 824          * Returns whether section editing is supported for the current page.
 825          * Subclasses may override this to replace the default behavior, which is
 826          * to check ContentHandler::supportsSections.
 827          *
 828          * @return bool True if this edit page supports sections, false otherwise.
 829          */
 830         protected function isSectionEditSupported() {
 831                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 832                 return $contentHandler->supportsSections();
 833         }
 834
 835         /**
 836          * This function collects the form data and uses it to populate various member variables.
 837          * @param WebRequest $request
 838          * @throws ErrorPageError
 839          */
 840         function importFormData( &$request ) {
 841                 global $wgContLang, $wgUser;
 842
 843                 # Section edit can come from either the form or a link
 844                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 845
 846                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 847                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 848                 }
 849
 850                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 851
 852                 if ( $request->wasPosted() ) {
 853                         # These fields need to be checked for encoding.
 854                         # Also remove trailing whitespace, but don't remove _initial_
 855                         # whitespace from the text boxes. This may be significant formatting.
 856                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 857                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 858                                 // Skip this if wpTextbox2 has input, it indicates that we came
 859                                 // from a conflict page with raw page text, not a custom form
 860                                 // modified by subclasses
 861                                 $textbox1 = $this->importContentFormData( $request );
 862                                 if ( $textbox1 !== null ) {
 863                                         $this->textbox1 = $textbox1;
 864                                 }
 865                         }
 866
 867                         # Truncate for whole multibyte characters
 868                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 869
 870                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 871                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 872                         # section titles.
 873                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 874
 875                         # Treat sectiontitle the same way as summary.
 876                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 877                         # currently doing double duty as both edit summary and section title. Right now this
 878                         # is just to allow API edits to work around this limitation, but this should be
 879                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 880                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 881                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 882
 883                         $this->edittime = $request->getVal( 'wpEdittime' );
 884                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 885                         $this->starttime = $request->getVal( 'wpStarttime' );
 886
 887                         $undidRev = $request->getInt( 'wpUndidRevision' );
 888                         if ( $undidRev ) {
 889                                 $this->undidRev = $undidRev;
 890                         }
 891
 892                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 893
 894                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 895                                 // wpTextbox1 field is missing, possibly due to being "too big"
 896                                 // according to some filter rules such as Suhosin's setting for
 897                                 // suhosin.request.max_value_length (d'oh)
 898                                 $this->incompleteForm = true;
 899                         } else {
 900                                 // If we receive the last parameter of the request, we can fairly
 901                                 // claim the POST request has not been truncated.
 902
 903                                 // TODO: softened the check for cutover.  Once we determine
 904                                 // that it is safe, we should complete the transition by
 905                                 // removing the "edittime" clause.
 906                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 907                                         && is_null( $this->edittime ) );
 908                         }
 909                         if ( $this->incompleteForm ) {
 910                                 # If the form is incomplete, force to preview.
 911                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 912                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 913                                 $this->preview = true;
 914                         } else {
 915                                 $this->preview = $request->getCheck( 'wpPreview' );
 916                                 $this->diff = $request->getCheck( 'wpDiff' );
 917
 918                                 // Remember whether a save was requested, so we can indicate
 919                                 // if we forced preview due to session failure.
 920                                 $this->mTriedSave = !$this->preview;
 921
 922                                 if ( $this->tokenOk( $request ) ) {
 923                                         # Some browsers will not report any submit button
 924                                         # if the user hits enter in the comment box.
 925                                         # The unmarked state will be assumed to be a save,
 926                                         # if the form seems otherwise complete.
 927                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 928                                 } elseif ( $this->diff ) {
 929                                         # Failed token check, but only requested "Show Changes".
 930                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 931                                 } else {
 932                                         # Page might be a hack attempt posted from
 933                                         # an external site. Preview instead of saving.
 934                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 935                                         $this->preview = true;
 936                                 }
 937                         }
 938                         $this->save = !$this->preview && !$this->diff;
 939                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 940                                 $this->edittime = null;
 941                         }
 942
 943                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 944                                 $this->starttime = null;
 945                         }
 946
 947                         $this->recreate = $request->getCheck( 'wpRecreate' );
 948
 949                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 950                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 951
 952                         # Don't force edit summaries when a user is editing their own user or talk page
 953                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 954                                 && $this->mTitle->getText() == $wgUser->getName()
 955                         ) {
 956                                 $this->allowBlankSummary = true;
 957                         } else {
 958                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 959                                         || !$wgUser->getOption( 'forceeditsummary' );
 960                         }
 961
 962                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 963
 964                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 965                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 966
 967                         $changeTags = $request->getVal( 'wpChangeTags' );
 968                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 969                                 $this->changeTags = [];
 970                         } else {
 971                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 972                                         $changeTags ) ) );
 973                         }
 974                 } else {
 975                         # Not a posted form? Start with nothing.
 976                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 977                         $this->textbox1 = '';
 978                         $this->summary = '';
 979                         $this->sectiontitle = '';
 980                         $this->edittime = '';
 981                         $this->editRevId = null;
 982                         $this->starttime = wfTimestampNow();
 983                         $this->edit = false;
 984                         $this->preview = false;
 985                         $this->save = false;
 986                         $this->diff = false;
 987                         $this->minoredit = false;
 988                         // Watch may be overridden by request parameters
 989                         $this->watchthis = $request->getBool( 'watchthis', false );
 990                         $this->recreate = false;
 991
 992                         // When creating a new section, we can preload a section title by passing it as the
 993                         // preloadtitle parameter in the URL (Bug 13100)
 994                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 995                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 996                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 997                                 $this->summary = $request->getVal( 'preloadtitle' );
 998                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 999                                 $this->summary = $request->getText( 'summary' );
1000                                 if ( $this->summary !== '' ) {
1001                                         $this->hasPresetSummary = true;
1002                                 }
1003                         }
1004
1005                         if ( $request->getVal( 'minor' ) ) {
1006                                 $this->minoredit = true;
1007                         }
1008                 }
1009
1010                 $this->oldid = $request->getInt( 'oldid' );
1011                 $this->parentRevId = $request->getInt( 'parentRevId' );
1012
1013                 $this->bot = $request->getBool( 'bot', true );
1014                 $this->nosummary = $request->getBool( 'nosummary' );
1015
1016                 // May be overridden by revision.
1017                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1018                 // May be overridden by revision.
1019                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1020
1021                 try {
1022                         $handler = ContentHandler::getForModelID( $this->contentModel );
1023                 } catch ( MWUnknownContentModelException $e ) {
1024                         throw new ErrorPageError(
1025                                 'editpage-invalidcontentmodel-title',
1026                                 'editpage-invalidcontentmodel-text',
1027                                 [ $this->contentModel ]
1028                         );
1029                 }
1030
1031                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1032                         throw new ErrorPageError(
1033                                 'editpage-notsupportedcontentformat-title',
1034                                 'editpage-notsupportedcontentformat-text',
1035                                 [ $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) ]
1036                         );
1037                 }
1038
1039                 /**
1040                  * @todo Check if the desired model is allowed in this namespace, and if
1041                  *   a transition from the page's current model to the new model is
1042                  *   allowed.
1043                  */
1044
1045                 $this->editintro = $request->getText( 'editintro',
1046                         // Custom edit intro for new sections
1047                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1048
1049                 // Allow extensions to modify form data
1050                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1051         }
1052
1053         /**
1054          * Subpage overridable method for extracting the page content data from the
1055          * posted form to be placed in $this->textbox1, if using customized input
1056          * this method should be overridden and return the page text that will be used
1057          * for saving, preview parsing and so on...
1058          *
1059          * @param WebRequest $request
1060          * @return string|null
1061          */
1062         protected function importContentFormData( &$request ) {
1063                 return; // Don't do anything, EditPage already extracted wpTextbox1
1064         }
1065
1066         /**
1067          * Initialise form fields in the object
1068          * Called on the first invocation, e.g. when a user clicks an edit link
1069          * @return bool If the requested section is valid
1070          */
1071         function initialiseForm() {
1072                 global $wgUser;
1073                 $this->edittime = $this->page->getTimestamp();
1074                 $this->editRevId = $this->page->getLatest();
1075
1076                 $content = $this->getContentObject( false ); # TODO: track content object?!
1077                 if ( $content === false ) {
1078                         return false;
1079                 }
1080                 $this->textbox1 = $this->toEditText( $content );
1081
1082                 // activate checkboxes if user wants them to be always active
1083                 # Sort out the "watch" checkbox
1084                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1085                         # Watch all edits
1086                         $this->watchthis = true;
1087                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1088                         # Watch creations
1089                         $this->watchthis = true;
1090                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1091                         # Already watched
1092                         $this->watchthis = true;
1093                 }
1094                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1095                         $this->minoredit = true;
1096                 }
1097                 if ( $this->textbox1 === false ) {
1098                         return false;
1099                 }
1100                 return true;
1101         }
1102
1103         /**
1104          * @param Content|null $def_content The default value to return
1105          *
1106          * @return Content|null Content on success, $def_content for invalid sections
1107          *
1108          * @since 1.21
1109          */
1110         protected function getContentObject( $def_content = null ) {
1111                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1112
1113                 $content = false;
1114
1115                 // For message page not locally set, use the i18n message.
1116                 // For other non-existent articles, use preload text if any.
1117                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1118                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1119                                 # If this is a system message, get the default text.
1120                                 $msg = $this->mTitle->getDefaultMessageText();
1121
1122                                 $content = $this->toEditContent( $msg );
1123                         }
1124                         if ( $content === false ) {
1125                                 # If requested, preload some text.
1126                                 $preload = $wgRequest->getVal( 'preload',
1127                                         // Custom preload text for new sections
1128                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1129                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1130
1131                                 $content = $this->getPreloadedContent( $preload, $params );
1132                         }
1133                 // For existing pages, get text based on "undo" or section parameters.
1134                 } else {
1135                         if ( $this->section != '' ) {
1136                                 // Get section edit text (returns $def_text for invalid sections)
1137                                 $orig = $this->getOriginalContent( $wgUser );
1138                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1139
1140                                 if ( !$content ) {
1141                                         $content = $def_content;
1142                                 }
1143                         } else {
1144                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1145                                 $undo = $wgRequest->getInt( 'undo' );
1146
1147                                 if ( $undo > 0 && $undoafter > 0 ) {
1148                                         $undorev = Revision::newFromId( $undo );
1149                                         $oldrev = Revision::newFromId( $undoafter );
1150
1151                                         # Sanity check, make sure it's the right page,
1152                                         # the revisions exist and they were not deleted.
1153                                         # Otherwise, $content will be left as-is.
1154                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1155                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1156                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1157                                         ) {
1158                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1159
1160                                                 if ( $content === false ) {
1161                                                         # Warn the user that something went wrong
1162                                                         $undoMsg = 'failure';
1163                                                 } else {
1164                                                         $oldContent = $this->page->getContent( Revision::RAW );
1165                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1166                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1167                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1168                                                                 // The undo may change content
1169                                                                 // model if its reverting the top
1170                                                                 // edit. This can result in
1171                                                                 // mismatched content model/format.
1172                                                                 $this->contentModel = $newContent->getModel();
1173                                                                 $this->contentFormat = $oldrev->getContentFormat();
1174                                                         }
1175
1176                                                         if ( $newContent->equals( $oldContent ) ) {
1177                                                                 # Tell the user that the undo results in no change,
1178                                                                 # i.e. the revisions were already undone.
1179                                                                 $undoMsg = 'nochange';
1180                                                                 $content = false;
1181                                                         } else {
1182                                                                 # Inform the user of our success and set an automatic edit summary
1183                                                                 $undoMsg = 'success';
1184
1185                                                                 # If we just undid one rev, use an autosummary
1186                                                                 $firstrev = $oldrev->getNext();
1187                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1188                                                                         $userText = $undorev->getUserText();
1189                                                                         if ( $userText === '' ) {
1190                                                                                 $undoSummary = $this->context->msg(
1191                                                                                         'undo-summary-username-hidden',
1192                                                                                         $undo
1193                                                                                 )->inContentLanguage()->text();
1194                                                                         } else {
1195                                                                                 $undoSummary = $this->context->msg(
1196                                                                                         'undo-summary',
1197                                                                                         $undo,
1198                                                                                         $userText
1199                                                                                 )->inContentLanguage()->text();
1200                                                                         }
1201                                                                         if ( $this->summary === '' ) {
1202                                                                                 $this->summary = $undoSummary;
1203                                                                         } else {
1204                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1205                                                                                         ->inContentLanguage()->text() . $this->summary;
1206                                                                         }
1207                                                                         $this->undidRev = $undo;
1208                                                                 }
1209                                                                 $this->formtype = 'diff';
1210                                                         }
1211                                                 }
1212                                         } else {
1213                                                 // Failed basic sanity checks.
1214                                                 // Older revisions may have been removed since the link
1215                                                 // was created, or we may simply have got bogus input.
1216                                                 $undoMsg = 'norev';
1217                                         }
1218
1219                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1220                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1221                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1222                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1223                                 }
1224
1225                                 if ( $content === false ) {
1226                                         $content = $this->getOriginalContent( $wgUser );
1227                                 }
1228                         }
1229                 }
1230
1231                 return $content;
1232         }
1233
1234         /**
1235          * Get the content of the wanted revision, without section extraction.
1236          *
1237          * The result of this function can be used to compare user's input with
1238          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1239          * to the original text of the edit.
1240          *
1241          * This differs from Article::getContent() that when a missing revision is
1242          * encountered the result will be null and not the
1243          * 'missing-revision' message.
1244          *
1245          * @since 1.19
1246          * @param User $user The user to get the revision for
1247          * @return Content|null
1248          */
1249         private function getOriginalContent( User $user ) {
1250                 if ( $this->section == 'new' ) {
1251                         return $this->getCurrentContent();
1252                 }
1253                 $revision = $this->mArticle->getRevisionFetched();
1254                 if ( $revision === null ) {
1255                         if ( !$this->contentModel ) {
1256                                 $this->contentModel = $this->getTitle()->getContentModel();
1257                         }
1258                         $handler = ContentHandler::getForModelID( $this->contentModel );
1259
1260                         return $handler->makeEmptyContent();
1261                 }
1262                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1263                 return $content;
1264         }
1265
1266         /**
1267          * Get the edit's parent revision ID
1268          *
1269          * The "parent" revision is the ancestor that should be recorded in this
1270          * page's revision history.  It is either the revision ID of the in-memory
1271          * article content, or in the case of a 3-way merge in order to rebase
1272          * across a recoverable edit conflict, the ID of the newer revision to
1273          * which we have rebased this page.
1274          *
1275          * @since 1.27
1276          * @return int Revision ID
1277          */
1278         public function getParentRevId() {
1279                 if ( $this->parentRevId ) {
1280                         return $this->parentRevId;
1281                 } else {
1282                         return $this->mArticle->getRevIdFetched();
1283                 }
1284         }
1285
1286         /**
1287          * Get the current content of the page. This is basically similar to
1288          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1289          * content object is returned instead of null.
1290          *
1291          * @since 1.21
1292          * @return Content
1293          */
1294         protected function getCurrentContent() {
1295                 $rev = $this->page->getRevision();
1296                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1297
1298                 if ( $content === false || $content === null ) {
1299                         if ( !$this->contentModel ) {
1300                                 $this->contentModel = $this->getTitle()->getContentModel();
1301                         }
1302                         $handler = ContentHandler::getForModelID( $this->contentModel );
1303
1304                         return $handler->makeEmptyContent();
1305                 } elseif ( !$this->undidRev ) {
1306                         // Content models should always be the same since we error
1307                         // out if they are different before this point (in ->edit()).
1308                         // The exception being, during an undo, the current revision might
1309                         // differ from the prior revision.
1310                         $logger = LoggerFactory::getInstance( 'editpage' );
1311                         if ( $this->contentModel !== $rev->getContentModel() ) {
1312                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1313                                         'prev' => $this->contentModel,
1314                                         'new' => $rev->getContentModel(),
1315                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1316                                         'method' => __METHOD__
1317                                 ] );
1318                                 $this->contentModel = $rev->getContentModel();
1319                         }
1320
1321                         // Given that the content models should match, the current selected
1322                         // format should be supported.
1323                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1324                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1325
1326                                         'prev' => $this->contentFormat,
1327                                         'new' => $rev->getContentFormat(),
1328                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1329                                         'method' => __METHOD__
1330                                 ] );
1331                                 $this->contentFormat = $rev->getContentFormat();
1332                         }
1333                 }
1334                 return $content;
1335         }
1336
1337         /**
1338          * Use this method before edit() to preload some content into the edit box
1339          *
1340          * @param Content $content
1341          *
1342          * @since 1.21
1343          */
1344         public function setPreloadedContent( Content $content ) {
1345                 $this->mPreloadContent = $content;
1346         }
1347
1348         /**
1349          * Get the contents to be preloaded into the box, either set by
1350          * an earlier setPreloadText() or by loading the given page.
1351          *
1352          * @param string $preload Representing the title to preload from.
1353          * @param array $params Parameters to use (interface-message style) in the preloaded text
1354          *
1355          * @return Content
1356          *
1357          * @since 1.21
1358          */
1359         protected function getPreloadedContent( $preload, $params = [] ) {
1360                 global $wgUser;
1361
1362                 if ( !empty( $this->mPreloadContent ) ) {
1363                         return $this->mPreloadContent;
1364                 }
1365
1366                 $handler = ContentHandler::getForModelID( $this->contentModel );
1367
1368                 if ( $preload === '' ) {
1369                         return $handler->makeEmptyContent();
1370                 }
1371
1372                 $title = Title::newFromText( $preload );
1373                 # Check for existence to avoid getting MediaWiki:Noarticletext
1374                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1375                         // TODO: somehow show a warning to the user!
1376                         return $handler->makeEmptyContent();
1377                 }
1378
1379                 $page = WikiPage::factory( $title );
1380                 if ( $page->isRedirect() ) {
1381                         $title = $page->getRedirectTarget();
1382                         # Same as before
1383                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1384                                 // TODO: somehow show a warning to the user!
1385                                 return $handler->makeEmptyContent();
1386                         }
1387                         $page = WikiPage::factory( $title );
1388                 }
1389
1390                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1391                 $content = $page->getContent( Revision::RAW );
1392
1393                 if ( !$content ) {
1394                         // TODO: somehow show a warning to the user!
1395                         return $handler->makeEmptyContent();
1396                 }
1397
1398                 if ( $content->getModel() !== $handler->getModelID() ) {
1399                         $converted = $content->convert( $handler->getModelID() );
1400
1401                         if ( !$converted ) {
1402                                 // TODO: somehow show a warning to the user!
1403                                 wfDebug( "Attempt to preload incompatible content: " .
1404                                         "can't convert " . $content->getModel() .
1405                                         " to " . $handler->getModelID() );
1406
1407                                 return $handler->makeEmptyContent();
1408                         }
1409
1410                         $content = $converted;
1411                 }
1412
1413                 return $content->preloadTransform( $title, $parserOptions, $params );
1414         }
1415
1416         /**
1417          * Make sure the form isn't faking a user's credentials.
1418          *
1419          * @param WebRequest $request
1420          * @return bool
1421          * @private
1422          */
1423         function tokenOk( &$request ) {
1424                 global $wgUser;
1425                 $token = $request->getVal( 'wpEditToken' );
1426                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1427                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1428                 return $this->mTokenOk;
1429         }
1430
1431         /**
1432          * Sets post-edit cookie indicating the user just saved a particular revision.
1433          *
1434          * This uses a temporary cookie for each revision ID so separate saves will never
1435          * interfere with each other.
1436          *
1437          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1438          * the redirect.  It must be clearable by JavaScript code, so it must not be
1439          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1440          * variable.
1441          *
1442          * If the variable were set on the server, it would be cached, which is unwanted
1443          * since the post-edit state should only apply to the load right after the save.
1444          *
1445          * @param int $statusValue The status value (to check for new article status)
1446          */
1447         protected function setPostEditCookie( $statusValue ) {
1448                 $revisionId = $this->page->getLatest();
1449                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1450
1451                 $val = 'saved';
1452                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1453                         $val = 'created';
1454                 } elseif ( $this->oldid ) {
1455                         $val = 'restored';
1456                 }
1457
1458                 $response = RequestContext::getMain()->getRequest()->response();
1459                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, [
1460                         'httpOnly' => false,
1461                 ] );
1462         }
1463
1464         /**
1465          * Attempt submission
1466          * @param array|bool $resultDetails See docs for $result in internalAttemptSave
1467          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1468          * @return Status The resulting status object.
1469          */
1470         public function attemptSave( &$resultDetails = false ) {
1471                 global $wgUser;
1472
1473                 # Allow bots to exempt some edits from bot flagging
1474                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1475                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1476
1477                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1478
1479                 return $status;
1480         }
1481
1482         /**
1483          * Handle status, such as after attempt save
1484          *
1485          * @param Status $status
1486          * @param array|bool $resultDetails
1487          *
1488          * @throws ErrorPageError
1489          * @return bool False, if output is done, true if rest of the form should be displayed
1490          */
1491         private function handleStatus( Status $status, $resultDetails ) {
1492                 global $wgUser, $wgOut;
1493
1494                 /**
1495                  * @todo FIXME: once the interface for internalAttemptSave() is made
1496                  *   nicer, this should use the message in $status
1497                  */
1498                 if ( $status->value == self::AS_SUCCESS_UPDATE
1499                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1500                 ) {
1501                         $this->didSave = true;
1502                         if ( !$resultDetails['nullEdit'] ) {
1503                                 $this->setPostEditCookie( $status->value );
1504                         }
1505                 }
1506
1507                 // "wpExtraQueryRedirect" is a hidden input to modify
1508                 // after save URL and is not used by actual edit form
1509                 $request = RequestContext::getMain()->getRequest();
1510                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1511
1512                 switch ( $status->value ) {
1513                         case self::AS_HOOK_ERROR_EXPECTED:
1514                         case self::AS_CONTENT_TOO_BIG:
1515                         case self::AS_ARTICLE_WAS_DELETED:
1516                         case self::AS_CONFLICT_DETECTED:
1517                         case self::AS_SUMMARY_NEEDED:
1518                         case self::AS_TEXTBOX_EMPTY:
1519                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1520                         case self::AS_END:
1521                         case self::AS_BLANK_ARTICLE:
1522                         case self::AS_SELF_REDIRECT:
1523                                 return true;
1524
1525                         case self::AS_HOOK_ERROR:
1526                                 return false;
1527
1528                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1529                         case self::AS_PARSE_ERROR:
1530                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1531                                 return true;
1532
1533                         case self::AS_SUCCESS_NEW_ARTICLE:
1534                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1535                                 if ( $extraQueryRedirect ) {
1536                                         if ( $query === '' ) {
1537                                                 $query = $extraQueryRedirect;
1538                                         } else {
1539                                                 $query = $query . '&' . $extraQueryRedirect;
1540                                         }
1541                                 }
1542                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1543                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1544                                 return false;
1545
1546                         case self::AS_SUCCESS_UPDATE:
1547                                 $extraQuery = '';
1548                                 $sectionanchor = $resultDetails['sectionanchor'];
1549
1550                                 // Give extensions a chance to modify URL query on update
1551                                 Hooks::run(
1552                                         'ArticleUpdateBeforeRedirect',
1553                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1554                                 );
1555
1556                                 if ( $resultDetails['redirect'] ) {
1557                                         if ( $extraQuery == '' ) {
1558                                                 $extraQuery = 'redirect=no';
1559                                         } else {
1560                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1561                                         }
1562                                 }
1563                                 if ( $extraQueryRedirect ) {
1564                                         if ( $extraQuery === '' ) {
1565                                                 $extraQuery = $extraQueryRedirect;
1566                                         } else {
1567                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1568                                         }
1569                                 }
1570
1571                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1572                                 return false;
1573
1574                         case self::AS_SPAM_ERROR:
1575                                 $this->spamPageWithContent( $resultDetails['spam'] );
1576                                 return false;
1577
1578                         case self::AS_BLOCKED_PAGE_FOR_USER:
1579                                 throw new UserBlockedError( $wgUser->getBlock() );
1580
1581                         case self::AS_IMAGE_REDIRECT_ANON:
1582                         case self::AS_IMAGE_REDIRECT_LOGGED:
1583                                 throw new PermissionsError( 'upload' );
1584
1585                         case self::AS_READ_ONLY_PAGE_ANON:
1586                         case self::AS_READ_ONLY_PAGE_LOGGED:
1587                                 throw new PermissionsError( 'edit' );
1588
1589                         case self::AS_READ_ONLY_PAGE:
1590                                 throw new ReadOnlyError;
1591
1592                         case self::AS_RATE_LIMITED:
1593                                 throw new ThrottledError();
1594
1595                         case self::AS_NO_CREATE_PERMISSION:
1596                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1597                                 throw new PermissionsError( $permission );
1598
1599                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1600                                 throw new PermissionsError( 'editcontentmodel' );
1601
1602                         default:
1603                                 // We don't recognize $status->value. The only way that can happen
1604                                 // is if an extension hook aborted from inside ArticleSave.
1605                                 // Render the status object into $this->hookError
1606                                 // FIXME this sucks, we should just use the Status object throughout
1607                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1608                                         '</div>';
1609                                 return true;
1610                 }
1611         }
1612
1613         /**
1614          * Run hooks that can filter edits just before they get saved.
1615          *
1616          * @param Content $content The Content to filter.
1617          * @param Status $status For reporting the outcome to the caller
1618          * @param User $user The user performing the edit
1619          *
1620          * @return bool
1621          */
1622         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1623                 // Run old style post-section-merge edit filter
1624                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1625                         [ $this, $content, &$this->hookError, $this->summary ],
1626                         '1.21'
1627                 ) ) {
1628                         # Error messages etc. could be handled within the hook...
1629                         $status->fatal( 'hookaborted' );
1630                         $status->value = self::AS_HOOK_ERROR;
1631                         return false;
1632                 } elseif ( $this->hookError != '' ) {
1633                         # ...or the hook could be expecting us to produce an error
1634                         $status->fatal( 'hookaborted' );
1635                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1636                         return false;
1637                 }
1638
1639                 // Run new style post-section-merge edit filter
1640                 if ( !Hooks::run( 'EditFilterMergedContent',
1641                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1642                                 $user, $this->minoredit ] )
1643                 ) {
1644                         # Error messages etc. could be handled within the hook...
1645                         if ( $status->isGood() ) {
1646                                 $status->fatal( 'hookaborted' );
1647                                 // Not setting $this->hookError here is a hack to allow the hook
1648                                 // to cause a return to the edit page without $this->hookError
1649                                 // being set. This is used by ConfirmEdit to display a captcha
1650                                 // without any error message cruft.
1651                         } else {
1652                                 $this->hookError = $status->getWikiText();
1653                         }
1654                         // Use the existing $status->value if the hook set it
1655                         if ( !$status->value ) {
1656                                 $status->value = self::AS_HOOK_ERROR;
1657                         }
1658                         return false;
1659                 } elseif ( !$status->isOK() ) {
1660                         # ...or the hook could be expecting us to produce an error
1661                         // FIXME this sucks, we should just use the Status object throughout
1662                         $this->hookError = $status->getWikiText();
1663                         $status->fatal( 'hookaborted' );
1664                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1665                         return false;
1666                 }
1667
1668                 return true;
1669         }
1670
1671         /**
1672          * Return the summary to be used for a new section.
1673          *
1674          * @param string $sectionanchor Set to the section anchor text
1675          * @return string
1676          */
1677         private function newSectionSummary( &$sectionanchor = null ) {
1678                 global $wgParser;
1679
1680                 if ( $this->sectiontitle !== '' ) {
1681                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1682                         // If no edit summary was specified, create one automatically from the section
1683                         // title and have it link to the new section. Otherwise, respect the summary as
1684                         // passed.
1685                         if ( $this->summary === '' ) {
1686                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1687                                 return $this->context->msg( 'newsectionsummary' )
1688                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1689                         }
1690                 } elseif ( $this->summary !== '' ) {
1691                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1692                         # This is a new section, so create a link to the new section
1693                         # in the revision summary.
1694                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1695                         return $this->context->msg( 'newsectionsummary' )
1696                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1697                 }
1698                 return $this->summary;
1699         }
1700
1701         /**
1702          * Attempt submission (no UI)
1703          *
1704          * @param array $result Array to add statuses to, currently with the
1705          *   possible keys:
1706          *   - spam (string): Spam string from content if any spam is detected by
1707          *     matchSpamRegex.
1708          *   - sectionanchor (string): Section anchor for a section save.
1709          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1710          *     false otherwise.
1711          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1712          *     revision is a redirect.
1713          * @param bool $bot True if edit is being made under the bot right.
1714          *
1715          * @return Status Status object, possibly with a message, but always with
1716          *   one of the AS_* constants in $status->value,
1717          *
1718          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1719          *   various error display idiosyncrasies. There are also lots of cases
1720          *   where error metadata is set in the object and retrieved later instead
1721          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1722          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1723          * time.
1724          */
1725         function internalAttemptSave( &$result, $bot = false ) {
1726                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1727                 global $wgContentHandlerUseDB;
1728
1729                 $status = Status::newGood();
1730
1731                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1732                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1733                         $status->fatal( 'hookaborted' );
1734                         $status->value = self::AS_HOOK_ERROR;
1735                         return $status;
1736                 }
1737
1738                 $spam = $wgRequest->getText( 'wpAntispam' );
1739                 if ( $spam !== '' ) {
1740                         wfDebugLog(
1741                                 'SimpleAntiSpam',
1742                                 $wgUser->getName() .
1743                                 ' editing "' .
1744                                 $this->mTitle->getPrefixedText() .
1745                                 '" submitted bogus field "' .
1746                                 $spam .
1747                                 '"'
1748                         );
1749                         $status->fatal( 'spamprotectionmatch', false );
1750                         $status->value = self::AS_SPAM_ERROR;
1751                         return $status;
1752                 }
1753
1754                 try {
1755                         # Construct Content object
1756                         $textbox_content = $this->toEditContent( $this->textbox1 );
1757                 } catch ( MWContentSerializationException $ex ) {
1758                         $status->fatal(
1759                                 'content-failed-to-parse',
1760                                 $this->contentModel,
1761                                 $this->contentFormat,
1762                                 $ex->getMessage()
1763                         );
1764                         $status->value = self::AS_PARSE_ERROR;
1765                         return $status;
1766                 }
1767
1768                 # Check image redirect
1769                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1770                         $textbox_content->isRedirect() &&
1771                         !$wgUser->isAllowed( 'upload' )
1772                 ) {
1773                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1774                                 $status->setResult( false, $code );
1775
1776                                 return $status;
1777                 }
1778
1779                 # Check for spam
1780                 $match = self::matchSummarySpamRegex( $this->summary );
1781                 if ( $match === false && $this->section == 'new' ) {
1782                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1783                         # regular summaries, it is added to the actual wikitext.
1784                         if ( $this->sectiontitle !== '' ) {
1785                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1786                                 $match = self::matchSpamRegex( $this->sectiontitle );
1787                         } else {
1788                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1789                                 # is used with the 'summary' parameter.
1790                                 $match = self::matchSpamRegex( $this->summary );
1791                         }
1792                 }
1793                 if ( $match === false ) {
1794                         $match = self::matchSpamRegex( $this->textbox1 );
1795                 }
1796                 if ( $match !== false ) {
1797                         $result['spam'] = $match;
1798                         $ip = $wgRequest->getIP();
1799                         $pdbk = $this->mTitle->getPrefixedDBkey();
1800                         $match = str_replace( "\n", '', $match );
1801                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1802                         $status->fatal( 'spamprotectionmatch', $match );
1803                         $status->value = self::AS_SPAM_ERROR;
1804                         return $status;
1805                 }
1806                 if ( !Hooks::run(
1807                         'EditFilter',
1808                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1809                 ) {
1810                         # Error messages etc. could be handled within the hook...
1811                         $status->fatal( 'hookaborted' );
1812                         $status->value = self::AS_HOOK_ERROR;
1813                         return $status;
1814                 } elseif ( $this->hookError != '' ) {
1815                         # ...or the hook could be expecting us to produce an error
1816                         $status->fatal( 'hookaborted' );
1817                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1818                         return $status;
1819                 }
1820
1821                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1822                         // Auto-block user's IP if the account was "hard" blocked
1823                         if ( !wfReadOnly() ) {
1824                                 $wgUser->spreadAnyEditBlock();
1825                         }
1826                         # Check block state against master, thus 'false'.
1827                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1828                         return $status;
1829                 }
1830
1831                 $this->contentLength = strlen( $this->textbox1 );
1832                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1833                         // Error will be displayed by showEditForm()
1834                         $this->tooBig = true;
1835                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1836                         return $status;
1837                 }
1838
1839                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1840                         if ( $wgUser->isAnon() ) {
1841                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1842                                 return $status;
1843                         } else {
1844                                 $status->fatal( 'readonlytext' );
1845                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1846                                 return $status;
1847                         }
1848                 }
1849
1850                 $changingContentModel = false;
1851                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1852                         if ( !$wgContentHandlerUseDB ) {
1853                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1854                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1855                                 return $status;
1856                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1857                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1858                                 return $status;
1859                         }
1860                         // Make sure the user can edit the page under the new content model too
1861                         $titleWithNewContentModel = clone $this->mTitle;
1862                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1863                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1864                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1865                         ) {
1866                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1867                                 return $status;
1868                         }
1869
1870                         $changingContentModel = true;
1871                         $oldContentModel = $this->mTitle->getContentModel();
1872                 }
1873
1874                 if ( $this->changeTags ) {
1875                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1876                                 $this->changeTags, $wgUser );
1877                         if ( !$changeTagsStatus->isOK() ) {
1878                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1879                                 return $changeTagsStatus;
1880                         }
1881                 }
1882
1883                 if ( wfReadOnly() ) {
1884                         $status->fatal( 'readonlytext' );
1885                         $status->value = self::AS_READ_ONLY_PAGE;
1886                         return $status;
1887                 }
1888                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1889                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1890                 ) {
1891                         $status->fatal( 'actionthrottledtext' );
1892                         $status->value = self::AS_RATE_LIMITED;
1893                         return $status;
1894                 }
1895
1896                 # If the article has been deleted while editing, don't save it without
1897                 # confirmation
1898                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1899                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1900                         return $status;
1901                 }
1902
1903                 # Load the page data from the master. If anything changes in the meantime,
1904                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1905                 $this->page->loadPageData( 'fromdbmaster' );
1906                 $new = !$this->page->exists();
1907
1908                 if ( $new ) {
1909                         // Late check for create permission, just in case *PARANOIA*
1910                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1911                                 $status->fatal( 'nocreatetext' );
1912                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1913                                 wfDebug( __METHOD__ . ": no create permission\n" );
1914                                 return $status;
1915                         }
1916
1917                         // Don't save a new page if it's blank or if it's a MediaWiki:
1918                         // message with content equivalent to default (allow empty pages
1919                         // in this case to disable messages, see bug 50124)
1920                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1921                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1922                                 $defaultText = $defaultMessageText;
1923                         } else {
1924                                 $defaultText = '';
1925                         }
1926
1927                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1928                                 $this->blankArticle = true;
1929                                 $status->fatal( 'blankarticle' );
1930                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1931                                 return $status;
1932                         }
1933
1934                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1935                                 return $status;
1936                         }
1937
1938                         $content = $textbox_content;
1939
1940                         $result['sectionanchor'] = '';
1941                         if ( $this->section == 'new' ) {
1942                                 if ( $this->sectiontitle !== '' ) {
1943                                         // Insert the section title above the content.
1944                                         $content = $content->addSectionHeader( $this->sectiontitle );
1945                                 } elseif ( $this->summary !== '' ) {
1946                                         // Insert the section title above the content.
1947                                         $content = $content->addSectionHeader( $this->summary );
1948                                 }
1949                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1950                         }
1951
1952                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1953
1954                 } else { # not $new
1955
1956                         # Article exists. Check for edit conflict.
1957
1958                         $this->page->clear(); # Force reload of dates, etc.
1959                         $timestamp = $this->page->getTimestamp();
1960                         $latest = $this->page->getLatest();
1961
1962                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1963
1964                         // Check editRevId if set, which handles same-second timestamp collisions
1965                         if ( $timestamp != $this->edittime
1966                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1967                         ) {
1968                                 $this->isConflict = true;
1969                                 if ( $this->section == 'new' ) {
1970                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1971                                                 $this->page->getComment() == $this->newSectionSummary()
1972                                         ) {
1973                                                 // Probably a duplicate submission of a new comment.
1974                                                 // This can happen when CDN resends a request after
1975                                                 // a timeout but the first one actually went through.
1976                                                 wfDebug( __METHOD__
1977                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1978                                         } else {
1979                                                 // New comment; suppress conflict.
1980                                                 $this->isConflict = false;
1981                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1982                                         }
1983                                 } elseif ( $this->section == ''
1984                                         && Revision::userWasLastToEdit(
1985                                                 DB_MASTER, $this->mTitle->getArticleID(),
1986                                                 $wgUser->getId(), $this->edittime
1987                                         )
1988                                 ) {
1989                                         # Suppress edit conflict with self, except for section edits where merging is required.
1990                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1991                                         $this->isConflict = false;
1992                                 }
1993                         }
1994
1995                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1996                         if ( $this->sectiontitle !== '' ) {
1997                                 $sectionTitle = $this->sectiontitle;
1998                         } else {
1999                                 $sectionTitle = $this->summary;
2000                         }
2001
2002                         $content = null;
2003
2004                         if ( $this->isConflict ) {
2005                                 wfDebug( __METHOD__
2006                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2007                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2008                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2009                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2010                                 if ( $this->editRevId !== null ) {
2011                                         $content = $this->page->replaceSectionAtRev(
2012                                                 $this->section,
2013                                                 $textbox_content,
2014                                                 $sectionTitle,
2015                                                 $this->editRevId
2016                                         );
2017                                 } else {
2018                                         $content = $this->page->replaceSectionContent(
2019                                                 $this->section,
2020                                                 $textbox_content,
2021                                                 $sectionTitle,
2022                                                 $this->edittime
2023                                         );
2024                                 }
2025                         } else {
2026                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2027                                 $content = $this->page->replaceSectionContent(
2028                                         $this->section,
2029                                         $textbox_content,
2030                                         $sectionTitle
2031                                 );
2032                         }
2033
2034                         if ( is_null( $content ) ) {
2035                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2036                                 $this->isConflict = true;
2037                                 $content = $textbox_content; // do not try to merge here!
2038                         } elseif ( $this->isConflict ) {
2039                                 # Attempt merge
2040                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2041                                         // Successful merge! Maybe we should tell the user the good news?
2042                                         $this->isConflict = false;
2043                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2044                                 } else {
2045                                         $this->section = '';
2046                                         $this->textbox1 = ContentHandler::getContentText( $content );
2047                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2048                                 }
2049                         }
2050
2051                         if ( $this->isConflict ) {
2052                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2053                                 return $status;
2054                         }
2055
2056                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2057                                 return $status;
2058                         }
2059
2060                         if ( $this->section == 'new' ) {
2061                                 // Handle the user preference to force summaries here
2062                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2063                                         $this->missingSummary = true;
2064                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2065                                         $status->value = self::AS_SUMMARY_NEEDED;
2066                                         return $status;
2067                                 }
2068
2069                                 // Do not allow the user to post an empty comment
2070                                 if ( $this->textbox1 == '' ) {
2071                                         $this->missingComment = true;
2072                                         $status->fatal( 'missingcommenttext' );
2073                                         $status->value = self::AS_TEXTBOX_EMPTY;
2074                                         return $status;
2075                                 }
2076                         } elseif ( !$this->allowBlankSummary
2077                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2078                                 && !$content->isRedirect()
2079                                 && md5( $this->summary ) == $this->autoSumm
2080                         ) {
2081                                 $this->missingSummary = true;
2082                                 $status->fatal( 'missingsummary' );
2083                                 $status->value = self::AS_SUMMARY_NEEDED;
2084                                 return $status;
2085                         }
2086
2087                         # All's well
2088                         $sectionanchor = '';
2089                         if ( $this->section == 'new' ) {
2090                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2091                         } elseif ( $this->section != '' ) {
2092                                 # Try to get a section anchor from the section source, redirect
2093                                 # to edited section if header found.
2094                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2095                                 # for duplicate heading checking and maybe parsing.
2096                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2097                                 # We can't deal with anchors, includes, html etc in the header for now,
2098                                 # headline would need to be parsed to improve this.
2099                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2100                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
2101                                 }
2102                         }
2103                         $result['sectionanchor'] = $sectionanchor;
2104
2105                         // Save errors may fall down to the edit form, but we've now
2106                         // merged the section into full text. Clear the section field
2107                         // so that later submission of conflict forms won't try to
2108                         // replace that into a duplicated mess.
2109                         $this->textbox1 = $this->toEditText( $content );
2110                         $this->section = '';
2111
2112                         $status->value = self::AS_SUCCESS_UPDATE;
2113                 }
2114
2115                 if ( !$this->allowSelfRedirect
2116                         && $content->isRedirect()
2117                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2118                 ) {
2119                         // If the page already redirects to itself, don't warn.
2120                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2121                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2122                                 $this->selfRedirect = true;
2123                                 $status->fatal( 'selfredirect' );
2124                                 $status->value = self::AS_SELF_REDIRECT;
2125                                 return $status;
2126                         }
2127                 }
2128
2129                 // Check for length errors again now that the section is merged in
2130                 $this->contentLength = strlen( $this->toEditText( $content ) );
2131                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2132                         $this->tooBig = true;
2133                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2134                         return $status;
2135                 }
2136
2137                 $flags = EDIT_AUTOSUMMARY |
2138                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2139                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2140                         ( $bot ? EDIT_FORCE_BOT : 0 );
2141
2142                 $doEditStatus = $this->page->doEditContent(
2143                         $content,
2144                         $this->summary,
2145                         $flags,
2146                         false,
2147                         $wgUser,
2148                         $content->getDefaultFormat(),
2149                         $this->changeTags
2150                 );
2151
2152                 if ( !$doEditStatus->isOK() ) {
2153                         // Failure from doEdit()
2154                         // Show the edit conflict page for certain recognized errors from doEdit(),
2155                         // but don't show it for errors from extension hooks
2156                         $errors = $doEditStatus->getErrorsArray();
2157                         if ( in_array( $errors[0][0],
2158                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2159                         ) {
2160                                 $this->isConflict = true;
2161                                 // Destroys data doEdit() put in $status->value but who cares
2162                                 $doEditStatus->value = self::AS_END;
2163                         }
2164                         return $doEditStatus;
2165                 }
2166
2167                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2168                 if ( $result['nullEdit'] ) {
2169                         // We don't know if it was a null edit until now, so increment here
2170                         $wgUser->pingLimiter( 'linkpurge' );
2171                 }
2172                 $result['redirect'] = $content->isRedirect();
2173
2174                 $this->updateWatchlist();
2175
2176                 // If the content model changed, add a log entry
2177                 if ( $changingContentModel ) {
2178                         $this->addContentModelChangeLogEntry(
2179                                 $wgUser,
2180                                 $new ? false : $oldContentModel,
2181                                 $this->contentModel,
2182                                 $this->summary
2183                         );
2184                 }
2185
2186                 return $status;
2187         }
2188
2189         /**
2190          * @param User $user
2191          * @param string|false $oldModel false if the page is being newly created
2192          * @param string $newModel
2193          * @param string $reason
2194          */
2195         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2196                 $new = $oldModel === false;
2197                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2198                 $log->setPerformer( $user );
2199                 $log->setTarget( $this->mTitle );
2200                 $log->setComment( $reason );
2201                 $log->setParameters( [
2202                         '4::oldmodel' => $oldModel,
2203                         '5::newmodel' => $newModel
2204                 ] );
2205                 $logid = $log->insert();
2206                 $log->publish( $logid );
2207         }
2208
2209         /**
2210          * Register the change of watch status
2211          */
2212         protected function updateWatchlist() {
2213                 global $wgUser;
2214
2215                 if ( !$wgUser->isLoggedIn() ) {
2216                         return;
2217                 }
2218
2219                 $user = $wgUser;
2220                 $title = $this->mTitle;
2221                 $watch = $this->watchthis;
2222                 // Do this in its own transaction to reduce contention...
2223                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2224                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2225                                 return; // nothing to change
2226                         }
2227                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2228                 } );
2229         }
2230
2231         /**
2232          * Attempts to do 3-way merge of edit content with a base revision
2233          * and current content, in case of edit conflict, in whichever way appropriate
2234          * for the content type.
2235          *
2236          * @since 1.21
2237          *
2238          * @param Content $editContent
2239          *
2240          * @return bool
2241          */
2242         private function mergeChangesIntoContent( &$editContent ) {
2243                 $db = wfGetDB( DB_MASTER );
2244
2245                 // This is the revision the editor started from
2246                 $baseRevision = $this->getBaseRevision();
2247                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2248
2249                 if ( is_null( $baseContent ) ) {
2250                         return false;
2251                 }
2252
2253                 // The current state, we want to merge updates into it
2254                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2255                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2256
2257                 if ( is_null( $currentContent ) ) {
2258                         return false;
2259                 }
2260
2261                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2262
2263                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2264
2265                 if ( $result ) {
2266                         $editContent = $result;
2267                         // Update parentRevId to what we just merged.
2268                         $this->parentRevId = $currentRevision->getId();
2269                         return true;
2270                 }
2271
2272                 return false;
2273         }
2274
2275         /**
2276          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2277          *        one might think of X as the "base revision", which is NOT what this returns.
2278          * @return Revision Current version when the edit was started
2279          */
2280         function getBaseRevision() {
2281                 if ( !$this->mBaseRevision ) {
2282                         $db = wfGetDB( DB_MASTER );
2283                         $this->mBaseRevision = $this->editRevId
2284                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2285                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2286                 }
2287                 return $this->mBaseRevision;
2288         }
2289
2290         /**
2291          * Check given input text against $wgSpamRegex, and return the text of the first match.
2292          *
2293          * @param string $text
2294          *
2295          * @return string|bool Matching string or false
2296          */
2297         public static function matchSpamRegex( $text ) {
2298                 global $wgSpamRegex;
2299                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2300                 $regexes = (array)$wgSpamRegex;
2301                 return self::matchSpamRegexInternal( $text, $regexes );
2302         }
2303
2304         /**
2305          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2306          *
2307          * @param string $text
2308          *
2309          * @return string|bool Matching string or false
2310          */
2311         public static function matchSummarySpamRegex( $text ) {
2312                 global $wgSummarySpamRegex;
2313                 $regexes = (array)$wgSummarySpamRegex;
2314                 return self::matchSpamRegexInternal( $text, $regexes );
2315         }
2316
2317         /**
2318          * @param string $text
2319          * @param array $regexes
2320          * @return bool|string
2321          */
2322         protected static function matchSpamRegexInternal( $text, $regexes ) {
2323                 foreach ( $regexes as $regex ) {
2324                         $matches = [];
2325                         if ( preg_match( $regex, $text, $matches ) ) {
2326                                 return $matches[0];
2327                         }
2328                 }
2329                 return false;
2330         }
2331
2332         function setHeaders() {
2333                 global $wgOut, $wgUser, $wgAjaxEditStash, $wgCookieSetOnAutoblock;
2334
2335                 $wgOut->addModules( 'mediawiki.action.edit' );
2336                 if ( $wgCookieSetOnAutoblock === true ) {
2337                         $wgOut->addModules( 'mediawiki.user.blockcookie' );
2338                 }
2339                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2340
2341                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2342                         // The addition of default buttons is handled by getEditToolbar() which
2343                         // has its own dependency on this module. The call here ensures the module
2344                         // is loaded in time (it has position "top") for other modules to register
2345                         // buttons (e.g. extensions, gadgets, user scripts).
2346                         $wgOut->addModules( 'mediawiki.toolbar' );
2347                 }
2348
2349                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2350                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2351                 }
2352
2353                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2354                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2355                 }
2356
2357                 # Enabled article-related sidebar, toplinks, etc.
2358                 $wgOut->setArticleRelated( true );
2359
2360                 $contextTitle = $this->getContextTitle();
2361                 if ( $this->isConflict ) {
2362                         $msg = 'editconflict';
2363                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2364                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2365                 } else {
2366                         $msg = $contextTitle->exists()
2367                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2368                                         && $contextTitle->getDefaultMessageText() !== false
2369                                 )
2370                                 ? 'editing'
2371                                 : 'creating';
2372                 }
2373
2374                 # Use the title defined by DISPLAYTITLE magic word when present
2375                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2376                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2377                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2378                 if ( $displayTitle === false ) {
2379                         $displayTitle = $contextTitle->getPrefixedText();
2380                 }
2381                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2382                 # Transmit the name of the message to JavaScript for live preview
2383                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2384                 $wgOut->addJsConfigVars( [
2385                         'wgEditMessage' => $msg,
2386                         'wgAjaxEditStash' => $wgAjaxEditStash,
2387                 ] );
2388         }
2389
2390         /**
2391          * Show all applicable editing introductions
2392          */
2393         protected function showIntro() {
2394                 global $wgOut, $wgUser;
2395                 if ( $this->suppressIntro ) {
2396                         return;
2397                 }
2398
2399                 $namespace = $this->mTitle->getNamespace();
2400
2401                 if ( $namespace == NS_MEDIAWIKI ) {
2402                         # Show a warning if editing an interface message
2403                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2404                         # If this is a default message (but not css or js),
2405                         # show a hint that it is translatable on translatewiki.net
2406                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2407                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2408                         ) {
2409                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2410                                 if ( $defaultMessageText !== false ) {
2411                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2412                                                 'translateinterface' );
2413                                 }
2414                         }
2415                 } elseif ( $namespace == NS_FILE ) {
2416                         # Show a hint to shared repo
2417                         $file = wfFindFile( $this->mTitle );
2418                         if ( $file && !$file->isLocal() ) {
2419                                 $descUrl = $file->getDescriptionUrl();
2420                                 # there must be a description url to show a hint to shared repo
2421                                 if ( $descUrl ) {
2422                                         if ( !$this->mTitle->exists() ) {
2423                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2424                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2425                                                 ] );
2426                                         } else {
2427                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2428                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2429                                                 ] );
2430                                         }
2431                                 }
2432                         }
2433                 }
2434
2435                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2436                 # Show log extract when the user is currently blocked
2437                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2438                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2439                         $user = User::newFromName( $username, false /* allow IP users*/ );
2440                         $ip = User::isIP( $username );
2441                         $block = Block::newFromTarget( $user, $user );
2442                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2443                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2444                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2445                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2446                                 # Show log extract if the user is currently blocked
2447                                 LogEventsList::showLogExtract(
2448                                         $wgOut,
2449                                         'block',
2450                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2451                                         '',
2452                                         [
2453                                                 'lim' => 1,
2454                                                 'showIfEmpty' => false,
2455                                                 'msgKey' => [
2456                                                         'blocked-notice-logextract',
2457                                                         $user->getName() # Support GENDER in notice
2458                                                 ]
2459                                         ]
2460                                 );
2461                         }
2462                 }
2463                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2464                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2465                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2466                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2467                         ) );
2468                         if ( $wgUser->isLoggedIn() ) {
2469                                 $wgOut->wrapWikiMsg(
2470                                         // Suppress the external link icon, consider the help url an internal one
2471                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2472                                         [
2473                                                 'newarticletext',
2474                                                 $helpLink
2475                                         ]
2476                                 );
2477                         } else {
2478                                 $wgOut->wrapWikiMsg(
2479                                         // Suppress the external link icon, consider the help url an internal one
2480                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2481                                         [
2482                                                 'newarticletextanon',
2483                                                 $helpLink
2484                                         ]
2485                                 );
2486                         }
2487                 }
2488                 # Give a notice if the user is editing a deleted/moved page...
2489                 if ( !$this->mTitle->exists() ) {
2490                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2491                                 '',
2492                                 [
2493                                         'lim' => 10,
2494                                         'conds' => [ "log_action != 'revision'" ],
2495                                         'showIfEmpty' => false,
2496                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2497                                 ]
2498                         );
2499                 }
2500         }
2501
2502         /**
2503          * Attempt to show a custom editing introduction, if supplied
2504          *
2505          * @return bool
2506          */
2507         protected function showCustomIntro() {
2508                 if ( $this->editintro ) {
2509                         $title = Title::newFromText( $this->editintro );
2510                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2511                                 global $wgOut;
2512                                 // Added using template syntax, to take <noinclude>'s into account.
2513                                 $wgOut->addWikiTextTitleTidy(
2514                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2515                                         $this->mTitle
2516                                 );
2517                                 return true;
2518                         }
2519                 }
2520                 return false;
2521         }
2522
2523         /**
2524          * Gets an editable textual representation of $content.
2525          * The textual representation can be turned by into a Content object by the
2526          * toEditContent() method.
2527          *
2528          * If $content is null or false or a string, $content is returned unchanged.
2529          *
2530          * If the given Content object is not of a type that can be edited using
2531          * the text base EditPage, an exception will be raised. Set
2532          * $this->allowNonTextContent to true to allow editing of non-textual
2533          * content.
2534          *
2535          * @param Content|null|bool|string $content
2536          * @return string The editable text form of the content.
2537          *
2538          * @throws MWException If $content is not an instance of TextContent and
2539          *   $this->allowNonTextContent is not true.
2540          */
2541         protected function toEditText( $content ) {
2542                 if ( $content === null || $content === false || is_string( $content ) ) {
2543                         return $content;
2544                 }
2545
2546                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2547                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2548                 }
2549
2550                 return $content->serialize( $this->contentFormat );
2551         }
2552
2553         /**
2554          * Turns the given text into a Content object by unserializing it.
2555          *
2556          * If the resulting Content object is not of a type that can be edited using
2557          * the text base EditPage, an exception will be raised. Set
2558          * $this->allowNonTextContent to true to allow editing of non-textual
2559          * content.
2560          *
2561          * @param string|null|bool $text Text to unserialize
2562          * @return Content|bool|null The content object created from $text. If $text was false
2563          *   or null, false resp. null will be  returned instead.
2564          *
2565          * @throws MWException If unserializing the text results in a Content
2566          *   object that is not an instance of TextContent and
2567          *   $this->allowNonTextContent is not true.
2568          */
2569         protected function toEditContent( $text ) {
2570                 if ( $text === false || $text === null ) {
2571                         return $text;
2572                 }
2573
2574                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2575                         $this->contentModel, $this->contentFormat );
2576
2577                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2578                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2579                 }
2580
2581                 return $content;
2582         }
2583
2584         /**
2585          * Send the edit form and related headers to $wgOut
2586          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2587          *     during form output near the top, for captchas and the like.
2588          *
2589          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2590          * use the EditPage::showEditForm:fields hook instead.
2591          */
2592         function showEditForm( $formCallback = null ) {
2593                 global $wgOut, $wgUser;
2594
2595                 # need to parse the preview early so that we know which templates are used,
2596                 # otherwise users with "show preview after edit box" will get a blank list
2597                 # we parse this near the beginning so that setHeaders can do the title
2598                 # setting work instead of leaving it in getPreviewText
2599                 $previewOutput = '';
2600                 if ( $this->formtype == 'preview' ) {
2601                         $previewOutput = $this->getPreviewText();
2602                 }
2603
2604                 Hooks::run( 'EditPage::showEditForm:initial', [ &$this, &$wgOut ] );
2605
2606                 $this->setHeaders();
2607
2608                 $this->addTalkPageText();
2609                 $this->addEditNotices();
2610
2611                 if ( !$this->isConflict &&
2612                         $this->section != '' &&
2613                         !$this->isSectionEditSupported() ) {
2614                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2615                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2616                         // Someone is welcome to try refactoring though
2617                         $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2618                         return;
2619                 }
2620
2621                 $this->showHeader();
2622
2623                 $wgOut->addHTML( $this->editFormPageTop );
2624
2625                 if ( $wgUser->getOption( 'previewontop' ) ) {
2626                         $this->displayPreviewArea( $previewOutput, true );
2627                 }
2628
2629                 $wgOut->addHTML( $this->editFormTextTop );
2630
2631                 $showToolbar = true;
2632                 if ( $this->wasDeletedSinceLastEdit() ) {
2633                         if ( $this->formtype == 'save' ) {
2634                                 // Hide the toolbar and edit area, user can click preview to get it back
2635                                 // Add an confirmation checkbox and explanation.
2636                                 $showToolbar = false;
2637                         } else {
2638                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2639                                         'deletedwhileediting' );
2640                         }
2641                 }
2642
2643                 // @todo add EditForm plugin interface and use it here!
2644                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2645                 $wgOut->addHTML( Html::openElement(
2646                         'form',
2647                         [
2648                                 'id' => self::EDITFORM_ID,
2649                                 'name' => self::EDITFORM_ID,
2650                                 'method' => 'post',
2651                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2652                                 'enctype' => 'multipart/form-data'
2653                         ]
2654                 ) );
2655
2656                 if ( is_callable( $formCallback ) ) {
2657                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2658                         call_user_func_array( $formCallback, [ &$wgOut ] );
2659                 }
2660
2661                 // Add an empty field to trip up spambots
2662                 $wgOut->addHTML(
2663                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2664                         . Html::rawElement(
2665                                 'label',
2666                                 [ 'for' => 'wpAntispam' ],
2667                                 $this->context->msg( 'simpleantispam-label' )->parse()
2668                         )
2669                         . Xml::element(
2670                                 'input',
2671                                 [
2672                                         'type' => 'text',
2673                                         'name' => 'wpAntispam',
2674                                         'id' => 'wpAntispam',
2675                                         'value' => ''
2676                                 ]
2677                         )
2678                         . Xml::closeElement( 'div' )
2679                 );
2680
2681                 Hooks::run( 'EditPage::showEditForm:fields', [ &$this, &$wgOut ] );
2682
2683                 // Put these up at the top to ensure they aren't lost on early form submission
2684                 $this->showFormBeforeText();
2685
2686                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2687                         $username = $this->lastDelete->user_name;
2688                         $comment = $this->lastDelete->log_comment;
2689
2690                         // It is better to not parse the comment at all than to have templates expanded in the middle
2691                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2692                         $key = $comment === ''
2693                                 ? 'confirmrecreate-noreason'
2694                                 : 'confirmrecreate';
2695                         $wgOut->addHTML(
2696                                 '<div class="mw-confirm-recreate">' .
2697                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2698                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2699                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2700                                 ) .
2701                                 '</div>'
2702                         );
2703                 }
2704
2705                 # When the summary is hidden, also hide them on preview/show changes
2706                 if ( $this->nosummary ) {
2707                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2708                 }
2709
2710                 # If a blank edit summary was previously provided, and the appropriate
2711                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2712                 # user being bounced back more than once in the event that a summary
2713                 # is not required.
2714                 # ####
2715                 # For a bit more sophisticated detection of blank summaries, hash the
2716                 # automatic one and pass that in the hidden field wpAutoSummary.
2717                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2718                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2719                 }
2720
2721                 if ( $this->undidRev ) {
2722                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2723                 }
2724
2725                 if ( $this->selfRedirect ) {
2726                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2727                 }
2728
2729                 if ( $this->hasPresetSummary ) {
2730                         // If a summary has been preset using &summary= we don't want to prompt for
2731                         // a different summary. Only prompt for a summary if the summary is blanked.
2732                         // (Bug 17416)
2733                         $this->autoSumm = md5( '' );
2734                 }
2735
2736                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2737                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2738
2739                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2740                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2741
2742                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2743                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2744
2745                 if ( $this->section == 'new' ) {
2746                         $this->showSummaryInput( true, $this->summary );
2747                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2748                 }
2749
2750                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2751
2752                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2753                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2754                 }
2755
2756                 if ( $this->blankArticle ) {
2757                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2758                 }
2759
2760                 if ( $this->isConflict ) {
2761                         // In an edit conflict bypass the overridable content form method
2762                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2763                         // resolved between page source edits and custom ui edits using the
2764                         // custom edit ui.
2765                         $this->textbox2 = $this->textbox1;
2766
2767                         $content = $this->getCurrentContent();
2768                         $this->textbox1 = $this->toEditText( $content );
2769
2770                         $this->showTextbox1();
2771                 } else {
2772                         $this->showContentForm();
2773                 }
2774
2775                 $wgOut->addHTML( $this->editFormTextAfterContent );
2776
2777                 $this->showStandardInputs();
2778
2779                 $this->showFormAfterText();
2780
2781                 $this->showTosSummary();
2782
2783                 $this->showEditTools();
2784
2785                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2786
2787                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2788
2789                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2790                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2791
2792                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2793                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2794
2795                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2796
2797                 if ( $this->isConflict ) {
2798                         try {
2799                                 $this->showConflict();
2800                         } catch ( MWContentSerializationException $ex ) {
2801                                 // this can't really happen, but be nice if it does.
2802                                 $msg = $this->context->msg(
2803                                         'content-failed-to-parse',
2804                                         $this->contentModel,
2805                                         $this->contentFormat,
2806                                         $ex->getMessage()
2807                                 );
2808                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2809                         }
2810                 }
2811
2812                 // Set a hidden field so JS knows what edit form mode we are in
2813                 if ( $this->isConflict ) {
2814                         $mode = 'conflict';
2815                 } elseif ( $this->preview ) {
2816                         $mode = 'preview';
2817                 } elseif ( $this->diff ) {
2818                         $mode = 'diff';
2819                 } else {
2820                         $mode = 'text';
2821                 }
2822                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2823
2824                 // Marker for detecting truncated form data.  This must be the last
2825                 // parameter sent in order to be of use, so do not move me.
2826                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2827                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2828
2829                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2830                         $this->displayPreviewArea( $previewOutput, false );
2831                 }
2832         }
2833
2834         /**
2835          * Wrapper around TemplatesOnThisPageFormatter to make
2836          * a "templates on this page" list.
2837          *
2838          * @param Title[] $templates
2839          * @return string HTML
2840          */
2841         protected function makeTemplatesOnThisPageList( array $templates ) {
2842                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2843                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2844                 );
2845
2846                 // preview if preview, else section if section, else false
2847                 $type = false;
2848                 if ( $this->preview ) {
2849                         $type = 'preview';
2850                 } elseif ( $this->section != '' ) {
2851                         $type = 'section';
2852                 }
2853
2854                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2855                         $templateListFormatter->format( $templates, $type )
2856                 );
2857         }
2858
2859         /**
2860          * Extract the section title from current section text, if any.
2861          *
2862          * @param string $text
2863          * @return string|bool String or false
2864          */
2865         public static function extractSectionTitle( $text ) {
2866                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2867                 if ( !empty( $matches[2] ) ) {
2868                         global $wgParser;
2869                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2870                 } else {
2871                         return false;
2872                 }
2873         }
2874
2875         protected function showHeader() {
2876                 global $wgOut, $wgUser;
2877                 global $wgAllowUserCss, $wgAllowUserJs;
2878
2879                 if ( $this->isConflict ) {
2880                         $this->addExplainConflictHeader( $wgOut );
2881                         $this->editRevId = $this->page->getLatest();
2882                 } else {
2883                         if ( $this->section != '' && $this->section != 'new' ) {
2884                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2885                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2886                                         if ( $sectionTitle !== false ) {
2887                                                 $this->summary = "/* $sectionTitle */ ";
2888                                         }
2889                                 }
2890                         }
2891
2892                         if ( $this->missingComment ) {
2893                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2894                         }
2895
2896                         if ( $this->missingSummary && $this->section != 'new' ) {
2897                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2898                         }
2899
2900                         if ( $this->missingSummary && $this->section == 'new' ) {
2901                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2902                         }
2903
2904                         if ( $this->blankArticle ) {
2905                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2906                         }
2907
2908                         if ( $this->selfRedirect ) {
2909                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2910                         }
2911
2912                         if ( $this->hookError !== '' ) {
2913                                 $wgOut->addWikiText( $this->hookError );
2914                         }
2915
2916                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2917                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2918                         }
2919
2920                         if ( $this->section != 'new' ) {
2921                                 $revision = $this->mArticle->getRevisionFetched();
2922                                 if ( $revision ) {
2923                                         // Let sysop know that this will make private content public if saved
2924
2925                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2926                                                 $wgOut->wrapWikiMsg(
2927                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2928                                                         'rev-deleted-text-permission'
2929                                                 );
2930                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2931                                                 $wgOut->wrapWikiMsg(
2932                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2933                                                         'rev-deleted-text-view'
2934                                                 );
2935                                         }
2936
2937                                         if ( !$revision->isCurrent() ) {
2938                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2939                                                 $wgOut->addWikiMsg( 'editingold' );
2940                                                 $this->isOldRev = true;
2941                                         }
2942                                 } elseif ( $this->mTitle->exists() ) {
2943                                         // Something went wrong
2944
2945                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2946                                                 [ 'missing-revision', $this->oldid ] );
2947                                 }
2948                         }
2949                 }
2950
2951                 if ( wfReadOnly() ) {
2952                         $wgOut->wrapWikiMsg(
2953                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2954                                 [ 'readonlywarning', wfReadOnlyReason() ]
2955                         );
2956                 } elseif ( $wgUser->isAnon() ) {
2957                         if ( $this->formtype != 'preview' ) {
2958                                 $wgOut->wrapWikiMsg(
2959                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2960                                         [ 'anoneditwarning',
2961                                                 // Log-in link
2962                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2963                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2964                                                 ] ),
2965                                                 // Sign-up link
2966                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2967                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2968                                                 ] )
2969                                         ]
2970                                 );
2971                         } else {
2972                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
2973                                         'anonpreviewwarning'
2974                                 );
2975                         }
2976                 } else {
2977                         if ( $this->isCssJsSubpage ) {
2978                                 # Check the skin exists
2979                                 if ( $this->isWrongCaseCssJsPage ) {
2980                                         $wgOut->wrapWikiMsg(
2981                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2982                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
2983                                         );
2984                                 }
2985                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2986                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
2987                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
2988                                         );
2989                                         if ( $this->formtype !== 'preview' ) {
2990                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2991                                                         $wgOut->wrapWikiMsg(
2992                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2993                                                                 [ 'usercssyoucanpreview' ]
2994                                                         );
2995                                                 }
2996
2997                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
2998                                                         $wgOut->wrapWikiMsg(
2999                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3000                                                                 [ 'userjsyoucanpreview' ]
3001                                                         );
3002                                                 }
3003                                         }
3004                                 }
3005                         }
3006                 }
3007
3008                 $this->addPageProtectionWarningHeaders();
3009
3010                 $this->addLongPageWarningHeader();
3011
3012                 # Add header copyright warning
3013                 $this->showHeaderCopyrightWarning();
3014         }
3015
3016         /**
3017          * Standard summary input and label (wgSummary), abstracted so EditPage
3018          * subclasses may reorganize the form.
3019          * Note that you do not need to worry about the label's for=, it will be
3020          * inferred by the id given to the input. You can remove them both by
3021          * passing [ 'id' => false ] to $userInputAttrs.
3022          *
3023          * @param string $summary The value of the summary input
3024          * @param string $labelText The html to place inside the label
3025          * @param array $inputAttrs Array of attrs to use on the input
3026          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3027          *
3028          * @return array An array in the format [ $label, $input ]
3029          */
3030         function getSummaryInput( $summary = "", $labelText = null,
3031                 $inputAttrs = null, $spanLabelAttrs = null
3032         ) {
3033                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3034                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3035                         'id' => 'wpSummary',
3036                         'maxlength' => '200',
3037                         'tabindex' => '1',
3038                         'size' => 60,
3039                         'spellcheck' => 'true',
3040                 ] + Linker::tooltipAndAccesskeyAttribs( 'summary' );
3041
3042                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3043                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3044                         'id' => "wpSummaryLabel"
3045                 ];
3046
3047                 $label = null;
3048                 if ( $labelText ) {
3049                         $label = Xml::tags(
3050                                 'label',
3051                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3052                                 $labelText
3053                         );
3054                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3055                 }
3056
3057                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3058
3059                 return [ $label, $input ];
3060         }
3061
3062         /**
3063          * @param bool $isSubjectPreview True if this is the section subject/title
3064          *   up top, or false if this is the comment summary
3065          *   down below the textarea
3066          * @param string $summary The text of the summary to display
3067          */
3068         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3069                 global $wgOut;
3070                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3071                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3072                 if ( $isSubjectPreview ) {
3073                         if ( $this->nosummary ) {
3074                                 return;
3075                         }
3076                 } else {
3077                         if ( !$this->mShowSummaryField ) {
3078                                 return;
3079                         }
3080                 }
3081                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3082                 list( $label, $input ) = $this->getSummaryInput(
3083                         $summary,
3084                         $labelText,
3085                         [ 'class' => $summaryClass ],
3086                         []
3087                 );
3088                 $wgOut->addHTML( "{$label} {$input}" );
3089         }
3090
3091         /**
3092          * @param bool $isSubjectPreview True if this is the section subject/title
3093          *   up top, or false if this is the comment summary
3094          *   down below the textarea
3095          * @param string $summary The text of the summary to display
3096          * @return string
3097          */
3098         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3099                 // avoid spaces in preview, gets always trimmed on save
3100                 $summary = trim( $summary );
3101                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3102                         return "";
3103                 }
3104
3105                 global $wgParser;
3106
3107                 if ( $isSubjectPreview ) {
3108                         $summary = $this->context->msg( 'newsectionsummary' )
3109                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3110                                 ->inContentLanguage()->text();
3111                 }
3112
3113                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3114
3115                 $summary = $this->context->msg( $message )->parse()
3116                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3117                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3118         }
3119
3120         protected function showFormBeforeText() {
3121                 global $wgOut;
3122                 $section = htmlspecialchars( $this->section );
3123                 $wgOut->addHTML( <<<HTML
3124 <input type='hidden' value="{$section}" name="wpSection"/>
3125 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3126 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3127 <input type='hidden' value="{$this->editRevId}" name="editRevId" />
3128 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3129
3130 HTML
3131                 );
3132                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3133                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3134                 }
3135         }
3136
3137         protected function showFormAfterText() {
3138                 global $wgOut, $wgUser;
3139                 /**
3140                  * To make it harder for someone to slip a user a page
3141                  * which submits an edit form to the wiki without their
3142                  * knowledge, a random token is associated with the login
3143                  * session. If it's not passed back with the submission,
3144                  * we won't save the page, or render user JavaScript and
3145                  * CSS previews.
3146                  *
3147                  * For anon editors, who may not have a session, we just
3148                  * include the constant suffix to prevent editing from
3149                  * broken text-mangling proxies.
3150                  */
3151                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3152         }
3153
3154         /**
3155          * Subpage overridable method for printing the form for page content editing
3156          * By default this simply outputs wpTextbox1
3157          * Subclasses can override this to provide a custom UI for editing;
3158          * be it a form, or simply wpTextbox1 with a modified content that will be
3159          * reverse modified when extracted from the post data.
3160          * Note that this is basically the inverse for importContentFormData
3161          */
3162         protected function showContentForm() {
3163                 $this->showTextbox1();
3164         }
3165
3166         /**
3167          * Method to output wpTextbox1
3168          * The $textoverride method can be used by subclasses overriding showContentForm
3169          * to pass back to this method.
3170          *
3171          * @param array $customAttribs Array of html attributes to use in the textarea
3172          * @param string $textoverride Optional text to override $this->textarea1 with
3173          */
3174         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3175                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3176                         $attribs = [ 'style' => 'display:none;' ];
3177                 } else {
3178                         $classes = []; // Textarea CSS
3179                         if ( $this->mTitle->isProtected( 'edit' ) &&
3180                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3181                         ) {
3182                                 # Is the title semi-protected?
3183                                 if ( $this->mTitle->isSemiProtected() ) {
3184                                         $classes[] = 'mw-textarea-sprotected';
3185                                 } else {
3186                                         # Then it must be protected based on static groups (regular)
3187                                         $classes[] = 'mw-textarea-protected';
3188                                 }
3189                                 # Is the title cascade-protected?
3190                                 if ( $this->mTitle->isCascadeProtected() ) {
3191                                         $classes[] = 'mw-textarea-cprotected';
3192                                 }
3193                         }
3194                         # Is an old revision being edited?
3195                         if ( $this->isOldRev ) {
3196                                 $classes[] = 'mw-textarea-oldrev';
3197                         }
3198
3199                         $attribs = [ 'tabindex' => 1 ];
3200
3201                         if ( is_array( $customAttribs ) ) {
3202                                 $attribs += $customAttribs;
3203                         }
3204
3205                         if ( count( $classes ) ) {
3206                                 if ( isset( $attribs['class'] ) ) {
3207                                         $classes[] = $attribs['class'];
3208                                 }
3209                                 $attribs['class'] = implode( ' ', $classes );
3210                         }
3211                 }
3212
3213                 $this->showTextbox(
3214                         $textoverride !== null ? $textoverride : $this->textbox1,
3215                         'wpTextbox1',
3216                         $attribs
3217                 );
3218         }
3219
3220         protected function showTextbox2() {
3221                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3222         }
3223
3224         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3225                 global $wgOut, $wgUser;
3226
3227                 $wikitext = $this->safeUnicodeOutput( $text );
3228                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3229
3230                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $wgUser );
3231
3232                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3233         }
3234
3235         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3236                 global $wgOut;
3237                 $classes = [];
3238                 if ( $isOnTop ) {
3239                         $classes[] = 'ontop';
3240                 }
3241
3242                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3243
3244                 if ( $this->formtype != 'preview' ) {
3245                         $attribs['style'] = 'display: none;';
3246                 }
3247
3248                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3249
3250                 if ( $this->formtype == 'preview' ) {
3251                         $this->showPreview( $previewOutput );
3252                 } else {
3253                         // Empty content container for LivePreview
3254                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3255                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3256                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3257                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3258                 }
3259
3260                 $wgOut->addHTML( '</div>' );
3261
3262                 if ( $this->formtype == 'diff' ) {
3263                         try {
3264                                 $this->showDiff();
3265                         } catch ( MWContentSerializationException $ex ) {
3266                                 $msg = $this->context->msg(
3267                                         'content-failed-to-parse',
3268                                         $this->contentModel,
3269                                         $this->contentFormat,
3270                                         $ex->getMessage()
3271                                 );
3272                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3273                         }
3274                 }
3275         }
3276
3277         /**
3278          * Append preview output to $wgOut.
3279          * Includes category rendering if this is a category page.
3280          *
3281          * @param string $text The HTML to be output for the preview.
3282          */
3283         protected function showPreview( $text ) {
3284                 global $wgOut;
3285                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3286                         $this->mArticle->openShowCategory();
3287                 }
3288                 # This hook seems slightly odd here, but makes things more
3289                 # consistent for extensions.
3290                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3291                 $wgOut->addHTML( $text );
3292                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3293                         $this->mArticle->closeShowCategory();
3294                 }
3295         }
3296
3297         /**
3298          * Get a diff between the current contents of the edit box and the
3299          * version of the page we're editing from.
3300          *
3301          * If this is a section edit, we'll replace the section as for final
3302          * save and then make a comparison.
3303          */
3304         function showDiff() {
3305                 global $wgUser, $wgContLang, $wgOut;
3306
3307                 $oldtitlemsg = 'currentrev';
3308                 # if message does not exist, show diff against the preloaded default
3309                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3310                         $oldtext = $this->mTitle->getDefaultMessageText();
3311                         if ( $oldtext !== false ) {
3312                                 $oldtitlemsg = 'defaultmessagetext';
3313                                 $oldContent = $this->toEditContent( $oldtext );
3314                         } else {
3315                                 $oldContent = null;
3316                         }
3317                 } else {
3318                         $oldContent = $this->getCurrentContent();
3319                 }
3320
3321                 $textboxContent = $this->toEditContent( $this->textbox1 );
3322                 if ( $this->editRevId !== null ) {
3323                         $newContent = $this->page->replaceSectionAtRev(
3324                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3325                         );
3326                 } else {
3327                         $newContent = $this->page->replaceSectionContent(
3328                                 $this->section, $textboxContent, $this->summary, $this->edittime
3329                         );
3330                 }
3331
3332                 if ( $newContent ) {
3333                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3334
3335                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3336                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3337                 }
3338
3339                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3340                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3341                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3342
3343                         if ( !$oldContent ) {
3344                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3345                         }
3346
3347                         if ( !$newContent ) {
3348                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3349                         }
3350
3351                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3352                         $de->setContent( $oldContent, $newContent );
3353
3354                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3355                         $de->showDiffStyle();
3356                 } else {
3357                         $difftext = '';
3358                 }
3359
3360                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3361         }
3362
3363         /**
3364          * Show the header copyright warning.
3365          */
3366         protected function showHeaderCopyrightWarning() {
3367                 $msg = 'editpage-head-copy-warn';
3368                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3369                         global $wgOut;
3370                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3371                                 'editpage-head-copy-warn' );
3372                 }
3373         }
3374
3375         /**
3376          * Give a chance for site and per-namespace customizations of
3377          * terms of service summary link that might exist separately
3378          * from the copyright notice.
3379          *
3380          * This will display between the save button and the edit tools,
3381          * so should remain short!
3382          */
3383         protected function showTosSummary() {
3384                 $msg = 'editpage-tos-summary';
3385                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3386                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3387                         global $wgOut;
3388                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3389                         $wgOut->addWikiMsg( $msg );
3390                         $wgOut->addHTML( '</div>' );
3391                 }
3392         }
3393
3394         protected function showEditTools() {
3395                 global $wgOut;
3396                 $wgOut->addHTML( '<div class="mw-editTools">' .
3397                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3398                         '</div>' );
3399         }
3400
3401         /**
3402          * Get the copyright warning
3403          *
3404          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3405          * @return string
3406          */
3407         protected function getCopywarn() {
3408                 return self::getCopyrightWarning( $this->mTitle );
3409         }
3410
3411         /**
3412          * Get the copyright warning, by default returns wikitext
3413          *
3414          * @param Title $title
3415          * @param string $format Output format, valid values are any function of a Message object
3416          * @param Language|string|null $langcode Language code or Language object.
3417          * @return string
3418          */
3419         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3420                 global $wgRightsText;
3421                 if ( $wgRightsText ) {
3422                         $copywarnMsg = [ 'copyrightwarning',
3423                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3424                                 $wgRightsText ];
3425                 } else {
3426                         $copywarnMsg = [ 'copyrightwarning2',
3427                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3428                 }
3429                 // Allow for site and per-namespace customization of contribution/copyright notice.
3430                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3431
3432                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3433                 if ( $langcode ) {
3434                         $msg->inLanguage( $langcode );
3435                 }
3436                 return "<div id=\"editpage-copywarn\">\n" .
3437                         $msg->$format() . "\n</div>";
3438         }
3439
3440         /**
3441          * Get the Limit report for page previews
3442          *
3443          * @since 1.22
3444          * @param ParserOutput $output ParserOutput object from the parse
3445          * @return string HTML
3446          */
3447         public static function getPreviewLimitReport( $output ) {
3448                 if ( !$output || !$output->getLimitReportData() ) {
3449                         return '';
3450                 }
3451
3452                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3453                         wfMessage( 'limitreport-title' )->parseAsBlock()
3454                 );
3455
3456                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3457                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3458
3459                 $limitReport .= Html::openElement( 'table', [
3460                         'class' => 'preview-limit-report wikitable'
3461                 ] ) .
3462                         Html::openElement( 'tbody' );
3463
3464                 foreach ( $output->getLimitReportData() as $key => $value ) {
3465                         if ( Hooks::run( 'ParserLimitReportFormat',
3466                                 [ $key, &$value, &$limitReport, true, true ]
3467                         ) ) {
3468                                 $keyMsg = wfMessage( $key );
3469                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3470                                 if ( !$valueMsg->exists() ) {
3471                                         $valueMsg = new RawMessage( '$1' );
3472                                 }
3473                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3474                                         $limitReport .= Html::openElement( 'tr' ) .
3475                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3476                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3477                                                 Html::closeElement( 'tr' );
3478                                 }
3479                         }
3480                 }
3481
3482                 $limitReport .= Html::closeElement( 'tbody' ) .
3483                         Html::closeElement( 'table' ) .
3484                         Html::closeElement( 'div' );
3485
3486                 return $limitReport;
3487         }
3488
3489         protected function showStandardInputs( &$tabindex = 2 ) {
3490                 global $wgOut;
3491                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3492
3493                 if ( $this->section != 'new' ) {
3494                         $this->showSummaryInput( false, $this->summary );
3495                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3496                 }
3497
3498                 $checkboxes = $this->getCheckboxes( $tabindex,
3499                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ] );
3500                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3501
3502                 // Show copyright warning.
3503                 $wgOut->addWikiText( $this->getCopywarn() );
3504                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3505
3506                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3507                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3508
3509                 $cancel = $this->getCancelLink();
3510                 if ( $cancel !== '' ) {
3511                         $cancel .= Html::element( 'span',
3512                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3513                                 $this->context->msg( 'pipe-separator' )->text() );
3514                 }
3515
3516                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3517                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3518                 $attrs = [
3519                         'target' => 'helpwindow',
3520                         'href' => $edithelpurl,
3521                 ];
3522                 $edithelp = Html::linkButton( $this->context->msg( 'edithelp' )->text(),
3523                         $attrs, [ 'mw-ui-quiet' ] ) .
3524                         $this->context->msg( 'word-separator' )->escaped() .
3525                         $this->context->msg( 'newwindow' )->parse();
3526
3527                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3528                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3529                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3530
3531                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3532
3533                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3534         }
3535
3536         /**
3537          * Show an edit conflict. textbox1 is already shown in showEditForm().
3538          * If you want to use another entry point to this function, be careful.
3539          */
3540         protected function showConflict() {
3541                 global $wgOut;
3542
3543                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$this, &$wgOut ] ) ) {
3544                         $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3545                         $stats->increment( 'edit.failures.conflict' );
3546                         // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3547                         if (
3548                                 $this->mTitle->getNamespace() >= NS_MAIN &&
3549                                 $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3550                         ) {
3551                                 $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3552                         }
3553
3554                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3555
3556                         $content1 = $this->toEditContent( $this->textbox1 );
3557                         $content2 = $this->toEditContent( $this->textbox2 );
3558
3559                         $handler = ContentHandler::getForModelID( $this->contentModel );
3560                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3561                         $de->setContent( $content2, $content1 );
3562                         $de->showDiff(
3563                                 $this->context->msg( 'yourtext' )->parse(),
3564                                 $this->context->msg( 'storedversion' )->text()
3565                         );
3566
3567                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3568                         $this->showTextbox2();
3569                 }
3570         }
3571
3572         /**
3573          * @return string
3574          */
3575         public function getCancelLink() {
3576                 $cancelParams = [];
3577                 if ( !$this->isConflict && $this->oldid > 0 ) {
3578                         $cancelParams['oldid'] = $this->oldid;
3579                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3580                         $cancelParams['redirect'] = 'no';
3581                 }
3582                 $attrs = [ 'id' => 'mw-editform-cancel' ];
3583
3584                 return Linker::linkKnown(
3585                         $this->getContextTitle(),
3586                         $this->context->msg( 'cancel' )->parse(),
3587                         Html::buttonAttributes( $attrs, [ '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         function getPreviewText() {
3680                 global $wgOut, $wgRawHtml, $wgLang;
3681                 global $wgAllowUserCss, $wgAllowUserJs;
3682
3683                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3684
3685                 if ( $wgRawHtml && !$this->mTokenOk ) {
3686                         // Could be an offsite preview attempt. This is very unsafe if
3687                         // HTML is enabled, as it could be an attack.
3688                         $parsedNote = '';
3689                         if ( $this->textbox1 !== '' ) {
3690                                 // Do not put big scary notice, if previewing the empty
3691                                 // string, which happens when you initially edit
3692                                 // a category page, due to automatic preview-on-open.
3693                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3694                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3695                                         true, /* interface */true );
3696                         }
3697                         $stats->increment( 'edit.failures.session_loss' );
3698                         return $parsedNote;
3699                 }
3700
3701                 $note = '';
3702
3703                 try {
3704                         $content = $this->toEditContent( $this->textbox1 );
3705
3706                         $previewHTML = '';
3707                         if ( !Hooks::run(
3708                                 'AlternateEditPreview',
3709                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3710                         ) {
3711                                 return $previewHTML;
3712                         }
3713
3714                         # provide a anchor link to the editform
3715                         $continueEditing = '<span class="mw-continue-editing">' .
3716                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3717                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3718                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3719                                 if ( $this->mTokenOkExceptSuffix ) {
3720                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3721                                         $stats->increment( 'edit.failures.bad_token' );
3722                                 } else {
3723                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3724                                         $stats->increment( 'edit.failures.session_loss' );
3725                                 }
3726                         } elseif ( $this->incompleteForm ) {
3727                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3728                                 if ( $this->mTriedSave ) {
3729                                         $stats->increment( 'edit.failures.incomplete_form' );
3730                                 }
3731                         } else {
3732                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3733                         }
3734
3735                         # don't parse non-wikitext pages, show message about preview
3736                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3737                                 if ( $this->mTitle->isCssJsSubpage() ) {
3738                                         $level = 'user';
3739                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3740                                         $level = 'site';
3741                                 } else {
3742                                         $level = false;
3743                                 }
3744
3745                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3746                                         $format = 'css';
3747                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3748                                                 $format = false;
3749                                         }
3750                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3751                                         $format = 'js';
3752                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3753                                                 $format = false;
3754                                         }
3755                                 } else {
3756                                         $format = false;
3757                                 }
3758
3759                                 # Used messages to make sure grep find them:
3760                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3761                                 if ( $level && $format ) {
3762                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3763                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3764                                                 ' ' . $continueEditing . "</div>";
3765                                 }
3766                         }
3767
3768                         # If we're adding a comment, we need to show the
3769                         # summary as the headline
3770                         if ( $this->section === "new" && $this->summary !== "" ) {
3771                                 $content = $content->addSectionHeader( $this->summary );
3772                         }
3773
3774                         $hook_args = [ $this, &$content ];
3775                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args, '1.25' );
3776                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3777
3778                         $parserResult = $this->doPreviewParse( $content );
3779                         $parserOutput = $parserResult['parserOutput'];
3780                         $previewHTML = $parserResult['html'];
3781                         $this->mParserOutput = $parserOutput;
3782                         $wgOut->addParserOutputMetadata( $parserOutput );
3783
3784                         if ( count( $parserOutput->getWarnings() ) ) {
3785                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3786                         }
3787
3788                 } catch ( MWContentSerializationException $ex ) {
3789                         $m = $this->context->msg(
3790                                 'content-failed-to-parse',
3791                                 $this->contentModel,
3792                                 $this->contentFormat,
3793                                 $ex->getMessage()
3794                         );
3795                         $note .= "\n\n" . $m->parse();
3796                         $previewHTML = '';
3797                 }
3798
3799                 if ( $this->isConflict ) {
3800                         $conflict = '<h2 id="mw-previewconflict">'
3801                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3802                 } else {
3803                         $conflict = '<hr />';
3804                 }
3805
3806                 $previewhead = "<div class='previewnote'>\n" .
3807                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3808                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3809
3810                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3811                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3812                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3813                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3814
3815                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3816         }
3817
3818         /**
3819          * Get parser options for a preview
3820          * @return ParserOptions
3821          */
3822         protected function getPreviewParserOptions() {
3823                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3824                 $parserOptions->setIsPreview( true );
3825                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3826                 $parserOptions->enableLimitReport();
3827                 return $parserOptions;
3828         }
3829
3830         /**
3831          * Parse the page for a preview. Subclasses may override this class, in order
3832          * to parse with different options, or to otherwise modify the preview HTML.
3833          *
3834          * @param Content $content The page content
3835          * @return array with keys:
3836          *   - parserOutput: The ParserOutput object
3837          *   - html: The HTML to be displayed
3838          */
3839         protected function doPreviewParse( Content $content ) {
3840                 global $wgUser;
3841                 $parserOptions = $this->getPreviewParserOptions();
3842                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3843                 $scopedCallback = $parserOptions->setupFakeRevision(
3844                         $this->mTitle, $pstContent, $wgUser );
3845                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3846                 ScopedCallback::consume( $scopedCallback );
3847                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3848                 return [
3849                         'parserOutput' => $parserOutput,
3850                         'html' => $parserOutput->getText() ];
3851         }
3852
3853         /**
3854          * @return array
3855          */
3856         function getTemplates() {
3857                 if ( $this->preview || $this->section != '' ) {
3858                         $templates = [];
3859                         if ( !isset( $this->mParserOutput ) ) {
3860                                 return $templates;
3861                         }
3862                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3863                                 foreach ( array_keys( $template ) as $dbk ) {
3864                                         $templates[] = Title::makeTitle( $ns, $dbk );
3865                                 }
3866                         }
3867                         return $templates;
3868                 } else {
3869                         return $this->mTitle->getTemplateLinksFrom();
3870                 }
3871         }
3872
3873         /**
3874          * Shows a bulletin board style toolbar for common editing functions.
3875          * It can be disabled in the user preferences.
3876          *
3877          * @param Title $title Title object for the page being edited (optional)
3878          * @return string
3879          */
3880         static function getEditToolbar( $title = null ) {
3881                 global $wgContLang, $wgOut;
3882                 global $wgEnableUploads, $wgForeignFileRepos;
3883
3884                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3885                 $showSignature = true;
3886                 if ( $title ) {
3887                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3888                 }
3889
3890                 /**
3891                  * $toolarray is an array of arrays each of which includes the
3892                  * opening tag, the closing tag, optionally a sample text that is
3893                  * inserted between the two when no selection is highlighted
3894                  * and.  The tip text is shown when the user moves the mouse
3895                  * over the button.
3896                  *
3897                  * Images are defined in ResourceLoaderEditToolbarModule.
3898                  */
3899                 $toolarray = [
3900                         [
3901                                 'id'     => 'mw-editbutton-bold',
3902                                 'open'   => '\'\'\'',
3903                                 'close'  => '\'\'\'',
3904                                 'sample' => wfMessage( 'bold_sample' )->text(),
3905                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3906                         ],
3907                         [
3908                                 'id'     => 'mw-editbutton-italic',
3909                                 'open'   => '\'\'',
3910                                 'close'  => '\'\'',
3911                                 'sample' => wfMessage( 'italic_sample' )->text(),
3912                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3913                         ],
3914                         [
3915                                 'id'     => 'mw-editbutton-link',
3916                                 'open'   => '[[',
3917                                 'close'  => ']]',
3918                                 'sample' => wfMessage( 'link_sample' )->text(),
3919                                 'tip'    => wfMessage( 'link_tip' )->text(),
3920                         ],
3921                         [
3922                                 'id'     => 'mw-editbutton-extlink',
3923                                 'open'   => '[',
3924                                 'close'  => ']',
3925                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3926                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3927                         ],
3928                         [
3929                                 'id'     => 'mw-editbutton-headline',
3930                                 'open'   => "\n== ",
3931                                 'close'  => " ==\n",
3932                                 'sample' => wfMessage( 'headline_sample' )->text(),
3933                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3934                         ],
3935                         $imagesAvailable ? [
3936                                 'id'     => 'mw-editbutton-image',
3937                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3938                                 'close'  => ']]',
3939                                 'sample' => wfMessage( 'image_sample' )->text(),
3940                                 'tip'    => wfMessage( 'image_tip' )->text(),
3941                         ] : false,
3942                         $imagesAvailable ? [
3943                                 'id'     => 'mw-editbutton-media',
3944                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3945                                 'close'  => ']]',
3946                                 'sample' => wfMessage( 'media_sample' )->text(),
3947                                 'tip'    => wfMessage( 'media_tip' )->text(),
3948                         ] : false,
3949                         [
3950                                 'id'     => 'mw-editbutton-nowiki',
3951                                 'open'   => "<nowiki>",
3952                                 'close'  => "</nowiki>",
3953                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3954                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3955                         ],
3956                         $showSignature ? [
3957                                 'id'     => 'mw-editbutton-signature',
3958                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
3959                                 'close'  => '',
3960                                 'sample' => '',
3961                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3962                         ] : false,
3963                         [
3964                                 'id'     => 'mw-editbutton-hr',
3965                                 'open'   => "\n----\n",
3966                                 'close'  => '',
3967                                 'sample' => '',
3968                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3969                         ]
3970                 ];
3971
3972                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3973                 foreach ( $toolarray as $tool ) {
3974                         if ( !$tool ) {
3975                                 continue;
3976                         }
3977
3978                         $params = [
3979                                 // Images are defined in ResourceLoaderEditToolbarModule
3980                                 false,
3981                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3982                                 // Older browsers show a "speedtip" type message only for ALT.
3983                                 // Ideally these should be different, realistically they
3984                                 // probably don't need to be.
3985                                 $tool['tip'],
3986                                 $tool['open'],
3987                                 $tool['close'],
3988                                 $tool['sample'],
3989                                 $tool['id'],
3990                         ];
3991
3992                         $script .= Xml::encodeJsCall(
3993                                 'mw.toolbar.addButton',
3994                                 $params,
3995                                 ResourceLoader::inDebugMode()
3996                         );
3997                 }
3998
3999                 $script .= '});';
4000                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4001
4002                 $toolbar = '<div id="toolbar"></div>';
4003
4004                 Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] );
4005
4006                 return $toolbar;
4007         }
4008
4009         /**
4010          * Returns an array of html code of the following checkboxes:
4011          * minor and watch
4012          *
4013          * @param int $tabindex Current tabindex
4014          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4015          *                 status of the checkbox
4016          *
4017          * @return array
4018          */
4019         public function getCheckboxes( &$tabindex, $checked ) {
4020                 global $wgUser, $wgUseMediaWikiUIEverywhere;
4021
4022                 $checkboxes = [];
4023
4024                 // don't show the minor edit checkbox if it's a new page or section
4025                 if ( !$this->isNew ) {
4026                         $checkboxes['minor'] = '';
4027                         $minorLabel = $this->context->msg( 'minoredit' )->parse();
4028                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
4029                                 $attribs = [
4030                                         'tabindex' => ++$tabindex,
4031                                         'accesskey' => $this->context->msg( 'accesskey-minoredit' )->text(),
4032                                         'id' => 'wpMinoredit',
4033                                 ];
4034                                 $minorEditHtml =
4035                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
4036                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
4037                                         Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ] ) .
4038                                         ">{$minorLabel}</label>";
4039
4040                                 if ( $wgUseMediaWikiUIEverywhere ) {
4041                                         $checkboxes['minor'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4042                                                 $minorEditHtml .
4043                                         Html::closeElement( 'div' );
4044                                 } else {
4045                                         $checkboxes['minor'] = $minorEditHtml;
4046                                 }
4047                         }
4048                 }
4049
4050                 $watchLabel = $this->context->msg( 'watchthis' )->parse();
4051                 $checkboxes['watch'] = '';
4052                 if ( $wgUser->isLoggedIn() ) {
4053                         $attribs = [
4054                                 'tabindex' => ++$tabindex,
4055                                 'accesskey' => $this->context->msg( 'accesskey-watch' )->text(),
4056                                 'id' => 'wpWatchthis',
4057                         ];
4058                         $watchThisHtml =
4059                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
4060                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
4061                                 Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ] ) .
4062                                 ">{$watchLabel}</label>";
4063                         if ( $wgUseMediaWikiUIEverywhere ) {
4064                                 $checkboxes['watch'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4065                                         $watchThisHtml .
4066                                         Html::closeElement( 'div' );
4067                         } else {
4068                                 $checkboxes['watch'] = $watchThisHtml;
4069                         }
4070                 }
4071                 Hooks::run( 'EditPageBeforeEditChecks', [ &$this, &$checkboxes, &$tabindex ] );
4072                 return $checkboxes;
4073         }
4074
4075         /**
4076          * Returns an array of html code of the following buttons:
4077          * save, diff and preview
4078          *
4079          * @param int $tabindex Current tabindex
4080          *
4081          * @return array
4082          */
4083         public function getEditButtons( &$tabindex ) {
4084                 $buttons = [];
4085
4086                 $labelAsPublish =
4087                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4088
4089                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4090                 if ( $labelAsPublish ) {
4091                         $buttonLabelKey = !$this->mTitle->exists() ? 'publishpage' : 'publishchanges';
4092                 } else {
4093                         $buttonLabelKey = !$this->mTitle->exists() ? 'savearticle' : 'savechanges';
4094                 }
4095                 $buttonLabel = $this->context->msg( $buttonLabelKey )->text();
4096                 $attribs = [
4097                         'id' => 'wpSave',
4098                         'name' => 'wpSave',
4099                         'tabindex' => ++$tabindex,
4100                 ] + Linker::tooltipAndAccesskeyAttribs( 'save' );
4101                 $buttons['save'] = Html::submitButton( $buttonLabel, $attribs, [ 'mw-ui-progressive' ] );
4102
4103                 ++$tabindex; // use the same for preview and live preview
4104                 $attribs = [
4105                         'id' => 'wpPreview',
4106                         'name' => 'wpPreview',
4107                         'tabindex' => $tabindex,
4108                 ] + Linker::tooltipAndAccesskeyAttribs( 'preview' );
4109                 $buttons['preview'] = Html::submitButton( $this->context->msg( 'showpreview' )->text(),
4110                         $attribs );
4111
4112                 $attribs = [
4113                         'id' => 'wpDiff',
4114                         'name' => 'wpDiff',
4115                         'tabindex' => ++$tabindex,
4116                 ] + Linker::tooltipAndAccesskeyAttribs( 'diff' );
4117                 $buttons['diff'] = Html::submitButton( $this->context->msg( 'showdiff' )->text(),
4118                         $attribs );
4119
4120                 Hooks::run( 'EditPageBeforeEditButtons', [ &$this, &$buttons, &$tabindex ] );
4121                 return $buttons;
4122         }
4123
4124         /**
4125          * Creates a basic error page which informs the user that
4126          * they have attempted to edit a nonexistent section.
4127          */
4128         function noSuchSectionPage() {
4129                 global $wgOut;
4130
4131                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4132
4133                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4134                 Hooks::run( 'EditPageNoSuchSection', [ &$this, &$res ] );
4135                 $wgOut->addHTML( $res );
4136
4137                 $wgOut->returnToMain( false, $this->mTitle );
4138         }
4139
4140         /**
4141          * Show "your edit contains spam" page with your diff and text
4142          *
4143          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4144          */
4145         public function spamPageWithContent( $match = false ) {
4146                 global $wgOut, $wgLang;
4147                 $this->textbox2 = $this->textbox1;
4148
4149                 if ( is_array( $match ) ) {
4150                         $match = $wgLang->listToText( $match );
4151                 }
4152                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4153
4154                 $wgOut->addHTML( '<div id="spamprotected">' );
4155                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4156                 if ( $match ) {
4157                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4158                 }
4159                 $wgOut->addHTML( '</div>' );
4160
4161                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4162                 $this->showDiff();
4163
4164                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4165                 $this->showTextbox2();
4166
4167                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4168         }
4169
4170         /**
4171          * Check if the browser is on a blacklist of user-agents known to
4172          * mangle UTF-8 data on form submission. Returns true if Unicode
4173          * should make it through, false if it's known to be a problem.
4174          * @return bool
4175          */
4176         private function checkUnicodeCompliantBrowser() {
4177                 global $wgBrowserBlackList, $wgRequest;
4178
4179                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4180                 if ( $currentbrowser === false ) {
4181                         // No User-Agent header sent? Trust it by default...
4182                         return true;
4183                 }
4184
4185                 foreach ( $wgBrowserBlackList as $browser ) {
4186                         if ( preg_match( $browser, $currentbrowser ) ) {
4187                                 return false;
4188                         }
4189                 }
4190                 return true;
4191         }
4192
4193         /**
4194          * Filter an input field through a Unicode de-armoring process if it
4195          * came from an old browser with known broken Unicode editing issues.
4196          *
4197          * @param WebRequest $request
4198          * @param string $field
4199          * @return string
4200          */
4201         protected function safeUnicodeInput( $request, $field ) {
4202                 $text = rtrim( $request->getText( $field ) );
4203                 return $request->getBool( 'safemode' )
4204                         ? $this->unmakeSafe( $text )
4205                         : $text;
4206         }
4207
4208         /**
4209          * Filter an output field through a Unicode armoring process if it is
4210          * going to an old browser with known broken Unicode editing issues.
4211          *
4212          * @param string $text
4213          * @return string
4214          */
4215         protected function safeUnicodeOutput( $text ) {
4216                 return $this->checkUnicodeCompliantBrowser()
4217                         ? $text
4218                         : $this->makeSafe( $text );
4219         }
4220
4221         /**
4222          * A number of web browsers are known to corrupt non-ASCII characters
4223          * in a UTF-8 text editing environment. To protect against this,
4224          * detected browsers will be served an armored version of the text,
4225          * with non-ASCII chars converted to numeric HTML character references.
4226          *
4227          * Preexisting such character references will have a 0 added to them
4228          * to ensure that round-trips do not alter the original data.
4229          *
4230          * @param string $invalue
4231          * @return string
4232          */
4233         private function makeSafe( $invalue ) {
4234                 // Armor existing references for reversibility.
4235                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4236
4237                 $bytesleft = 0;
4238                 $result = "";
4239                 $working = 0;
4240                 $valueLength = strlen( $invalue );
4241                 for ( $i = 0; $i < $valueLength; $i++ ) {
4242                         $bytevalue = ord( $invalue[$i] );
4243                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4244                                 $result .= chr( $bytevalue );
4245                                 $bytesleft = 0;
4246                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4247                                 $working = $working << 6;
4248                                 $working += ( $bytevalue & 0x3F );
4249                                 $bytesleft--;
4250                                 if ( $bytesleft <= 0 ) {
4251                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4252                                 }
4253                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4254                                 $working = $bytevalue & 0x1F;
4255                                 $bytesleft = 1;
4256                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4257                                 $working = $bytevalue & 0x0F;
4258                                 $bytesleft = 2;
4259                         } else { // 1111 0xxx
4260                                 $working = $bytevalue & 0x07;
4261                                 $bytesleft = 3;
4262                         }
4263                 }
4264                 return $result;
4265         }
4266
4267         /**
4268          * Reverse the previously applied transliteration of non-ASCII characters
4269          * back to UTF-8. Used to protect data from corruption by broken web browsers
4270          * as listed in $wgBrowserBlackList.
4271          *
4272          * @param string $invalue
4273          * @return string
4274          */
4275         private function unmakeSafe( $invalue ) {
4276                 $result = "";
4277                 $valueLength = strlen( $invalue );
4278                 for ( $i = 0; $i < $valueLength; $i++ ) {
4279                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4280                                 $i += 3;
4281                                 $hexstring = "";
4282                                 do {
4283                                         $hexstring .= $invalue[$i];
4284                                         $i++;
4285                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4286
4287                                 // Do some sanity checks. These aren't needed for reversibility,
4288                                 // but should help keep the breakage down if the editor
4289                                 // breaks one of the entities whilst editing.
4290                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4291                                         $codepoint = hexdec( $hexstring );
4292                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4293                                 } else {
4294                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4295                                 }
4296                         } else {
4297                                 $result .= substr( $invalue, $i, 1 );
4298                         }
4299                 }
4300                 // reverse the transform that we made for reversibility reasons.
4301                 return strtr( $result, [ "&#x0" => "&#x" ] );
4302         }
4303
4304         /**
4305          * @since 1.29
4306          */
4307         protected function addEditNotices() {
4308                 global $wgOut;
4309
4310                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4311                 if ( count( $editNotices ) ) {
4312                         $wgOut->addHTML( implode( "\n", $editNotices ) );
4313                 } else {
4314                         $msg = $this->context->msg( 'editnotice-notext' );
4315                         if ( !$msg->isDisabled() ) {
4316                                 $wgOut->addHTML(
4317                                         '<div class="mw-editnotice-notext">'
4318                                         . $msg->parseAsBlock()
4319                                         . '</div>'
4320                                 );
4321                         }
4322                 }
4323         }
4324
4325         /**
4326          * @since 1.29
4327          */
4328         protected function addTalkPageText() {
4329                 global $wgOut;
4330
4331                 if ( $this->mTitle->isTalkPage() ) {
4332                         $wgOut->addWikiMsg( 'talkpagetext' );
4333                 }
4334         }
4335
4336         /**
4337          * @since 1.29
4338          */
4339         protected function addLongPageWarningHeader() {
4340                 global $wgMaxArticleSize, $wgOut, $wgLang;
4341
4342                 if ( $this->contentLength === false ) {
4343                         $this->contentLength = strlen( $this->textbox1 );
4344                 }
4345
4346                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4347                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4348                                 [
4349                                         'longpageerror',
4350                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4351                                         $wgLang->formatNum( $wgMaxArticleSize )
4352                                 ]
4353                         );
4354                 } else {
4355                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4356                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4357                                         [
4358                                                 'longpage-hint',
4359                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4360                                                 strlen( $this->textbox1 )
4361                                         ]
4362                                 );
4363                         }
4364                 }
4365         }
4366
4367         /**
4368          * @since 1.29
4369          */
4370         protected function addPageProtectionWarningHeaders() {
4371                 global $wgOut;
4372
4373                 if ( $this->mTitle->isProtected( 'edit' ) &&
4374                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4375                 ) {
4376                         # Is the title semi-protected?
4377                         if ( $this->mTitle->isSemiProtected() ) {
4378                                 $noticeMsg = 'semiprotectedpagewarning';
4379                         } else {
4380                                 # Then it must be protected based on static groups (regular)
4381                                 $noticeMsg = 'protectedpagewarning';
4382                         }
4383                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4384                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4385                 }
4386                 if ( $this->mTitle->isCascadeProtected() ) {
4387                         # Is this page under cascading protection from some source pages?
4388                         /** @var Title[] $cascadeSources */
4389                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4390                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4391                         $cascadeSourcesCount = count( $cascadeSources );
4392                         if ( $cascadeSourcesCount > 0 ) {
4393                                 # Explain, and list the titles responsible
4394                                 foreach ( $cascadeSources as $page ) {
4395                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4396                                 }
4397                         }
4398                         $notice .= '</div>';
4399                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4400                 }
4401                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4402                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4403                                 [ 'lim' => 1,
4404                                         'showIfEmpty' => false,
4405                                         'msgKey' => [ 'titleprotectedwarning' ],
4406                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4407                 }
4408         }
4409
4410         /**
4411          * @param OutputPage $out
4412          * @since 1.29
4413          */
4414         protected function addExplainConflictHeader( OutputPage $out ) {
4415                 $out->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
4416         }
4417
4418         /**
4419          * @param string $name
4420          * @param mixed[] $customAttribs
4421          * @param User $user
4422          * @return mixed[]
4423          * @since 1.29
4424          */
4425         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4426                 $attribs = $customAttribs + [
4427                                 'accesskey' => ',',
4428                                 'id' => $name,
4429                                 'cols' => $user->getIntOption( 'cols' ),
4430                                 'rows' => $user->getIntOption( 'rows' ),
4431                                 // Avoid PHP notices when appending preferences
4432                                 // (appending allows customAttribs['style'] to still work).
4433                                 'style' => ''
4434                         ];
4435
4436                 // The following classes can be used here:
4437                 // * mw-editfont-default
4438                 // * mw-editfont-monospace
4439                 // * mw-editfont-sans-serif
4440                 // * mw-editfont-serif
4441                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4442
4443                 if ( isset( $attribs['class'] ) ) {
4444                         if ( is_string( $attribs['class'] ) ) {
4445                                 $attribs['class'] .= ' ' . $class;
4446                         } elseif ( is_array( $attribs['class'] ) ) {
4447                                 $attribs['class'][] = $class;
4448                         }
4449                 } else {
4450                         $attribs['class'] = $class;
4451                 }
4452
4453                 $pageLang = $this->mTitle->getPageLanguage();
4454                 $attribs['lang'] = $pageLang->getHtmlCode();
4455                 $attribs['dir'] = $pageLang->getDir();
4456
4457                 return $attribs;
4458         }
4459
4460         /**
4461          * @param string $wikitext
4462          * @return string
4463          * @since 1.29
4464          */
4465         protected function addNewLineAtEnd( $wikitext ) {
4466                 if ( strval( $wikitext ) !== '' ) {
4467                         // Ensure there's a newline at the end, otherwise adding lines
4468                         // is awkward.
4469                         // But don't add a newline if the text is empty, or Firefox in XHTML
4470                         // mode will show an extra newline. A bit annoying.
4471                         $wikitext .= "\n";
4472                         return $wikitext;
4473                 }
4474                 return $wikitext;
4475         }
4476 }