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
  26 /**
  27  * The edit page/HTML interface (split from Article)
  28  * The actual database and text munging is still in Article,
  29  * but it should get easier to call those from alternate
  30  * interfaces.
  31  *
  32  * EditPage cares about two distinct titles:
  33  * $this->mContextTitle is the page that forms submit to, links point to,
  34  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  35  * page in the database that is actually being edited. These are
  36  * usually the same, but they are now allowed to be different.
  37  *
  38  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  39  * headaches, which may be fatal.
  40  */
  41 class EditPage {
  42         /**
  43          * Status: Article successfully updated
  44          */
  45         const AS_SUCCESS_UPDATE = 200;
  46
  47         /**
  48          * Status: Article successfully created
  49          */
  50         const AS_SUCCESS_NEW_ARTICLE = 201;
  51
  52         /**
  53          * Status: Article update aborted by a hook function
  54          */
  55         const AS_HOOK_ERROR = 210;
  56
  57         /**
  58          * Status: A hook function returned an error
  59          */
  60         const AS_HOOK_ERROR_EXPECTED = 212;
  61
  62         /**
  63          * Status: User is blocked from editing this page
  64          */
  65         const AS_BLOCKED_PAGE_FOR_USER = 215;
  66
  67         /**
  68          * Status: Content too big (> $wgMaxArticleSize)
  69          */
  70         const AS_CONTENT_TOO_BIG = 216;
  71
  72         /**
  73          * Status: this anonymous user is not allowed to edit this page
  74          */
  75         const AS_READ_ONLY_PAGE_ANON = 218;
  76
  77         /**
  78          * Status: this logged in user is not allowed to edit this page
  79          */
  80         const AS_READ_ONLY_PAGE_LOGGED = 219;
  81
  82         /**
  83          * Status: wiki is in readonly mode (wfReadOnly() == true)
  84          */
  85         const AS_READ_ONLY_PAGE = 220;
  86
  87         /**
  88          * Status: rate limiter for action 'edit' was tripped
  89          */
  90         const AS_RATE_LIMITED = 221;
  91
  92         /**
  93          * Status: article was deleted while editing and param wpRecreate == false or form
  94          * was not posted
  95          */
  96         const AS_ARTICLE_WAS_DELETED = 222;
  97
  98         /**
  99          * Status: user tried to create this page, but is not allowed to do that
 100          * ( Title->userCan('create') == false )
 101          */
 102         const AS_NO_CREATE_PERMISSION = 223;
 103
 104         /**
 105          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 106          */
 107         const AS_BLANK_ARTICLE = 224;
 108
 109         /**
 110          * Status: (non-resolvable) edit conflict
 111          */
 112         const AS_CONFLICT_DETECTED = 225;
 113
 114         /**
 115          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 116          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 117          */
 118         const AS_SUMMARY_NEEDED = 226;
 119
 120         /**
 121          * Status: user tried to create a new section without content
 122          */
 123         const AS_TEXTBOX_EMPTY = 228;
 124
 125         /**
 126          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 127          */
 128         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 129
 130         /**
 131          * Status: WikiPage::doEdit() was unsuccessful
 132          */
 133         const AS_END = 231;
 134
 135         /**
 136          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 137          */
 138         const AS_SPAM_ERROR = 232;
 139
 140         /**
 141          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 142          */
 143         const AS_IMAGE_REDIRECT_ANON = 233;
 144
 145         /**
 146          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 147          */
 148         const AS_IMAGE_REDIRECT_LOGGED = 234;
 149
 150         /**
 151          * Status: user tried to modify the content model, but is not allowed to do that
 152          * ( User::isAllowed('editcontentmodel') == false )
 153          */
 154         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 155
 156         /**
 157          * Status: user tried to create self-redirect (redirect to the same article) and
 158          * wpIgnoreSelfRedirect == false
 159          */
 160         const AS_SELF_REDIRECT = 236;
 161
 162         /**
 163          * Status: an error relating to change tagging. Look at the message key for
 164          * more details
 165          */
 166         const AS_CHANGE_TAG_ERROR = 237;
 167
 168         /**
 169          * Status: can't parse content
 170          */
 171         const AS_PARSE_ERROR = 240;
 172
 173         /**
 174          * Status: when changing the content model is disallowed due to
 175          * $wgContentHandlerUseDB being false
 176          */
 177         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 178
 179         /**
 180          * HTML id and name for the beginning of the edit form.
 181          */
 182         const EDITFORM_ID = 'editform';
 183
 184         /**
 185          * Prefix of key for cookie used to pass post-edit state.
 186          * The revision id edited is added after this
 187          */
 188         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 189
 190         /**
 191          * Duration of PostEdit cookie, in seconds.
 192          * The cookie will be removed instantly if the JavaScript runs.
 193          *
 194          * Otherwise, though, we don't want the cookies to accumulate.
 195          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 196          * limit of only 20 cookies per domain. This still applies at least to some
 197          * versions of IE without full updates:
 198          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 199          *
 200          * A value of 20 minutes should be enough to take into account slow loads and minor
 201          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 202          */
 203         const POST_EDIT_COOKIE_DURATION = 1200;
 204
 205         /** @var Article */
 206         public $mArticle;
 207         /** @var WikiPage */
 208         private $page;
 209
 210         /** @var Title */
 211         public $mTitle;
 212
 213         /** @var null|Title */
 214         private $mContextTitle = null;
 215
 216         /** @var string */
 217         public $action = 'submit';
 218
 219         /** @var bool */
 220         public $isConflict = false;
 221
 222         /** @var bool */
 223         public $isCssJsSubpage = false;
 224
 225         /** @var bool */
 226         public $isCssSubpage = false;
 227
 228         /** @var bool */
 229         public $isJsSubpage = false;
 230
 231         /** @var bool */
 232         public $isWrongCaseCssJsPage = false;
 233
 234         /** @var bool New page or new section */
 235         public $isNew = false;
 236
 237         /** @var bool */
 238         public $deletedSinceEdit;
 239
 240         /** @var string */
 241         public $formtype;
 242
 243         /** @var bool */
 244         public $firsttime;
 245
 246         /** @var bool|stdClass */
 247         public $lastDelete;
 248
 249         /** @var bool */
 250         public $mTokenOk = false;
 251
 252         /** @var bool */
 253         public $mTokenOkExceptSuffix = false;
 254
 255         /** @var bool */
 256         public $mTriedSave = false;
 257
 258         /** @var bool */
 259         public $incompleteForm = false;
 260
 261         /** @var bool */
 262         public $tooBig = false;
 263
 264         /** @var bool */
 265         public $missingComment = false;
 266
 267         /** @var bool */
 268         public $missingSummary = false;
 269
 270         /** @var bool */
 271         public $allowBlankSummary = false;
 272
 273         /** @var bool */
 274         protected $blankArticle = false;
 275
 276         /** @var bool */
 277         protected $allowBlankArticle = false;
 278
 279         /** @var bool */
 280         protected $selfRedirect = false;
 281
 282         /** @var bool */
 283         protected $allowSelfRedirect = false;
 284
 285         /** @var string */
 286         public $autoSumm = '';
 287
 288         /** @var string */
 289         public $hookError = '';
 290
 291         /** @var ParserOutput */
 292         public $mParserOutput;
 293
 294         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 295         public $hasPresetSummary = false;
 296
 297         /** @var bool */
 298         public $mBaseRevision = false;
 299
 300         /** @var bool */
 301         public $mShowSummaryField = true;
 302
 303         # Form values
 304
 305         /** @var bool */
 306         public $save = false;
 307
 308         /** @var bool */
 309         public $preview = false;
 310
 311         /** @var bool */
 312         public $diff = false;
 313
 314         /** @var bool */
 315         public $minoredit = false;
 316
 317         /** @var bool */
 318         public $watchthis = false;
 319
 320         /** @var bool */
 321         public $recreate = false;
 322
 323         /** @var string */
 324         public $textbox1 = '';
 325
 326         /** @var string */
 327         public $textbox2 = '';
 328
 329         /** @var string */
 330         public $summary = '';
 331
 332         /** @var bool */
 333         public $nosummary = false;
 334
 335         /** @var string */
 336         public $edittime = '';
 337
 338         /** @var integer */
 339         private $editRevId = null;
 340
 341         /** @var string */
 342         public $section = '';
 343
 344         /** @var string */
 345         public $sectiontitle = '';
 346
 347         /** @var string */
 348         public $starttime = '';
 349
 350         /** @var int */
 351         public $oldid = 0;
 352
 353         /** @var int */
 354         public $parentRevId = 0;
 355
 356         /** @var string */
 357         public $editintro = '';
 358
 359         /** @var null */
 360         public $scrolltop = null;
 361
 362         /** @var bool */
 363         public $bot = true;
 364
 365         /** @var null|string */
 366         public $contentModel = null;
 367
 368         /** @var null|string */
 369         public $contentFormat = null;
 370
 371         /** @var null|array */
 372         private $changeTags = null;
 373
 374         # Placeholders for text injection by hooks (must be HTML)
 375         # extensions should take care to _append_ to the present value
 376
 377         /** @var string Before even the preview */
 378         public $editFormPageTop = '';
 379         public $editFormTextTop = '';
 380         public $editFormTextBeforeContent = '';
 381         public $editFormTextAfterWarn = '';
 382         public $editFormTextAfterTools = '';
 383         public $editFormTextBottom = '';
 384         public $editFormTextAfterContent = '';
 385         public $previewTextAfterContent = '';
 386         public $mPreloadContent = null;
 387
 388         /* $didSave should be set to true whenever an article was successfully altered. */
 389         public $didSave = false;
 390         public $undidRev = 0;
 391
 392         public $suppressIntro = false;
 393
 394         /** @var bool */
 395         protected $edit;
 396
 397         /** @var bool|int */
 398         protected $contentLength = false;
 399
 400         /**
 401          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 402          */
 403         private $enableApiEditOverride = false;
 404
 405         /**
 406          * @var IContextSource
 407          */
 408         protected $context;
 409
 410         /**
 411          * @param Article $article
 412          */
 413         public function __construct( Article $article ) {
 414                 $this->mArticle = $article;
 415                 $this->page = $article->getPage(); // model object
 416                 $this->mTitle = $article->getTitle();
 417                 $this->context = $article->getContext();
 418
 419                 $this->contentModel = $this->mTitle->getContentModel();
 420
 421                 $handler = ContentHandler::getForModelID( $this->contentModel );
 422                 $this->contentFormat = $handler->getDefaultFormat();
 423         }
 424
 425         /**
 426          * @return Article
 427          */
 428         public function getArticle() {
 429                 return $this->mArticle;
 430         }
 431
 432         /**
 433          * @since 1.28
 434          * @return IContextSource
 435          */
 436         public function getContext() {
 437                 return $this->context;
 438         }
 439
 440         /**
 441          * @since 1.19
 442          * @return Title
 443          */
 444         public function getTitle() {
 445                 return $this->mTitle;
 446         }
 447
 448         /**
 449          * Set the context Title object
 450          *
 451          * @param Title|null $title Title object or null
 452          */
 453         public function setContextTitle( $title ) {
 454                 $this->mContextTitle = $title;
 455         }
 456
 457         /**
 458          * Get the context title object.
 459          * If not set, $wgTitle will be returned. This behavior might change in
 460          * the future to return $this->mTitle instead.
 461          *
 462          * @return Title
 463          */
 464         public function getContextTitle() {
 465                 if ( is_null( $this->mContextTitle ) ) {
 466                         global $wgTitle;
 467                         return $wgTitle;
 468                 } else {
 469                         return $this->mContextTitle;
 470                 }
 471         }
 472
 473         /**
 474          * Returns if the given content model is editable.
 475          *
 476          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 477          * @return bool
 478          * @throws MWException If $modelId has no known handler
 479          */
 480         public function isSupportedContentModel( $modelId ) {
 481                 return $this->enableApiEditOverride === true ||
 482                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 483         }
 484
 485         /**
 486          * Allow editing of content that supports API direct editing, but not general
 487          * direct editing. Set to false by default.
 488          *
 489          * @param bool $enableOverride
 490          */
 491         public function setApiEditOverride( $enableOverride ) {
 492                 $this->enableApiEditOverride = $enableOverride;
 493         }
 494
 495         function submit() {
 496                 $this->edit();
 497         }
 498
 499         /**
 500          * This is the function that gets called for "action=edit". It
 501          * sets up various member variables, then passes execution to
 502          * another function, usually showEditForm()
 503          *
 504          * The edit form is self-submitting, so that when things like
 505          * preview and edit conflicts occur, we get the same form back
 506          * with the extra stuff added.  Only when the final submission
 507          * is made and all is well do we actually save and redirect to
 508          * the newly-edited page.
 509          */
 510         function edit() {
 511                 global $wgOut, $wgRequest, $wgUser;
 512                 // Allow extensions to modify/prevent this form or submission
 513                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 514                         return;
 515                 }
 516
 517                 wfDebug( __METHOD__ . ": enter\n" );
 518
 519                 // If they used redlink=1 and the page exists, redirect to the main article
 520                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 521                         $wgOut->redirect( $this->mTitle->getFullURL() );
 522                         return;
 523                 }
 524
 525                 $this->importFormData( $wgRequest );
 526                 $this->firsttime = false;
 527
 528                 if ( wfReadOnly() && $this->save ) {
 529                         // Force preview
 530                         $this->save = false;
 531                         $this->preview = true;
 532                 }
 533
 534                 if ( $this->save ) {
 535                         $this->formtype = 'save';
 536                 } elseif ( $this->preview ) {
 537                         $this->formtype = 'preview';
 538                 } elseif ( $this->diff ) {
 539                         $this->formtype = 'diff';
 540                 } else { # First time through
 541                         $this->firsttime = true;
 542                         if ( $this->previewOnOpen() ) {
 543                                 $this->formtype = 'preview';
 544                         } else {
 545                                 $this->formtype = 'initial';
 546                         }
 547                 }
 548
 549                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 550                 if ( $permErrors ) {
 551                         wfDebug( __METHOD__ . ": User can't edit\n" );
 552                         // Auto-block user's IP if the account was "hard" blocked
 553                         if ( !wfReadOnly() ) {
 554                                 $user = $wgUser;
 555                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 556                                         $user->spreadAnyEditBlock();
 557                                 } );
 558                         }
 559                         $this->displayPermissionsError( $permErrors );
 560
 561                         return;
 562                 }
 563
 564                 $revision = $this->mArticle->getRevisionFetched();
 565                 // Disallow editing revisions with content models different from the current one
 566                 // Undo edits being an exception in order to allow reverting content model changes.
 567                 if ( $revision
 568                         && $revision->getContentModel() !== $this->contentModel
 569                 ) {
 570                         $prevRev = null;
 571                         if ( $this->undidRev ) {
 572                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 573                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 574                         }
 575                         if ( !$this->undidRev
 576                                 || !$prevRev
 577                                 || $prevRev->getContentModel() !== $this->contentModel
 578                         ) {
 579                                 $this->displayViewSourcePage(
 580                                         $this->getContentObject(),
 581                                         $this->context->msg(
 582                                                 'contentmodelediterror',
 583                                                 $revision->getContentModel(),
 584                                                 $this->contentModel
 585                                         )->plain()
 586                                 );
 587                                 return;
 588                         }
 589                 }
 590
 591                 $this->isConflict = false;
 592                 // css / js subpages of user pages get a special treatment
 593                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 594                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 595                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 596                 // @todo FIXME: Silly assignment.
 597                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 598
 599                 # Show applicable editing introductions
 600                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 601                         $this->showIntro();
 602                 }
 603
 604                 # Attempt submission here.  This will check for edit conflicts,
 605                 # and redundantly check for locked database, blocked IPs, etc.
 606                 # that edit() already checked just in case someone tries to sneak
 607                 # in the back door with a hand-edited submission URL.
 608
 609                 if ( 'save' == $this->formtype ) {
 610                         $resultDetails = null;
 611                         $status = $this->attemptSave( $resultDetails );
 612                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 613                                 return;
 614                         }
 615                 }
 616
 617                 # First time through: get contents, set time for conflict
 618                 # checking, etc.
 619                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 620                         if ( $this->initialiseForm() === false ) {
 621                                 $this->noSuchSectionPage();
 622                                 return;
 623                         }
 624
 625                         if ( !$this->mTitle->getArticleID() ) {
 626                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 627                         } else {
 628                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 629                         }
 630
 631                 }
 632
 633                 $this->showEditForm();
 634         }
 635
 636         /**
 637          * @param string $rigor Same format as Title::getUserPermissionErrors()
 638          * @return array
 639          */
 640         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 641                 global $wgUser;
 642
 643                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 644                 # Can this title be created?
 645                 if ( !$this->mTitle->exists() ) {
 646                         $permErrors = array_merge(
 647                                 $permErrors,
 648                                 wfArrayDiff2(
 649                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 650                                         $permErrors
 651                                 )
 652                         );
 653                 }
 654                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 655                 $remove = [];
 656                 foreach ( $permErrors as $error ) {
 657                         if ( ( $this->preview || $this->diff )
 658                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 659                         ) {
 660                                 $remove[] = $error;
 661                         }
 662                 }
 663                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 664
 665                 return $permErrors;
 666         }
 667
 668         /**
 669          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 670          * but with the following differences:
 671          * - If redlink=1, the user will be redirected to the page
 672          * - If there is content to display or the error occurs while either saving,
 673          *   previewing or showing the difference, it will be a
 674          *   "View source for ..." page displaying the source code after the error message.
 675          *
 676          * @since 1.19
 677          * @param array $permErrors Array of permissions errors, as returned by
 678          *    Title::getUserPermissionsErrors().
 679          * @throws PermissionsError
 680          */
 681         protected function displayPermissionsError( array $permErrors ) {
 682                 global $wgRequest, $wgOut;
 683
 684                 if ( $wgRequest->getBool( 'redlink' ) ) {
 685                         // The edit page was reached via a red link.
 686                         // Redirect to the article page and let them click the edit tab if
 687                         // they really want a permission error.
 688                         $wgOut->redirect( $this->mTitle->getFullURL() );
 689                         return;
 690                 }
 691
 692                 $content = $this->getContentObject();
 693
 694                 # Use the normal message if there's nothing to display
 695                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 696                         $action = $this->mTitle->exists() ? 'edit' :
 697                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 698                         throw new PermissionsError( $action, $permErrors );
 699                 }
 700
 701                 $this->displayViewSourcePage(
 702                         $content,
 703                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 704                 );
 705         }
 706
 707         /**
 708          * Display a read-only View Source page
 709          * @param Content $content content object
 710          * @param string $errorMessage additional wikitext error message to display
 711          */
 712         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 713                 global $wgOut;
 714
 715                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 716
 717                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 718                 $wgOut->setPageTitle( $this->context->msg(
 719                         'viewsource-title',
 720                         $this->getContextTitle()->getPrefixedText()
 721                 ) );
 722                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 723                 $wgOut->addHTML( $this->editFormPageTop );
 724                 $wgOut->addHTML( $this->editFormTextTop );
 725
 726                 if ( $errorMessage !== '' ) {
 727                         $wgOut->addWikiText( $errorMessage );
 728                         $wgOut->addHTML( "<hr />\n" );
 729                 }
 730
 731                 # If the user made changes, preserve them when showing the markup
 732                 # (This happens when a user is blocked during edit, for instance)
 733                 if ( !$this->firsttime ) {
 734                         $text = $this->textbox1;
 735                         $wgOut->addWikiMsg( 'viewyourtext' );
 736                 } else {
 737                         try {
 738                                 $text = $this->toEditText( $content );
 739                         } catch ( MWException $e ) {
 740                                 # Serialize using the default format if the content model is not supported
 741                                 # (e.g. for an old revision with a different model)
 742                                 $text = $content->serialize();
 743                         }
 744                         $wgOut->addWikiMsg( 'viewsourcetext' );
 745                 }
 746
 747                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 748                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 749                 $wgOut->addHTML( $this->editFormTextAfterContent );
 750
 751                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 752
 753                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 754
 755                 $wgOut->addHTML( $this->editFormTextBottom );
 756                 if ( $this->mTitle->exists() ) {
 757                         $wgOut->returnToMain( null, $this->mTitle );
 758                 }
 759         }
 760
 761         /**
 762          * Should we show a preview when the edit form is first shown?
 763          *
 764          * @return bool
 765          */
 766         protected function previewOnOpen() {
 767                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 768                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 769                         // Explicit override from request
 770                         return true;
 771                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 772                         // Explicit override from request
 773                         return false;
 774                 } elseif ( $this->section == 'new' ) {
 775                         // Nothing *to* preview for new sections
 776                         return false;
 777                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 778                         && $wgUser->getOption( 'previewonfirst' )
 779                 ) {
 780                         // Standard preference behavior
 781                         return true;
 782                 } elseif ( !$this->mTitle->exists()
 783                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 784                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 785                 ) {
 786                         // Categories are special
 787                         return true;
 788                 } else {
 789                         return false;
 790                 }
 791         }
 792
 793         /**
 794          * Checks whether the user entered a skin name in uppercase,
 795          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 796          *
 797          * @return bool
 798          */
 799         protected function isWrongCaseCssJsPage() {
 800                 if ( $this->mTitle->isCssJsSubpage() ) {
 801                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 802                         $skins = array_merge(
 803                                 array_keys( Skin::getSkinNames() ),
 804                                 [ 'common' ]
 805                         );
 806                         return !in_array( $name, $skins )
 807                                 && in_array( strtolower( $name ), $skins );
 808                 } else {
 809                         return false;
 810                 }
 811         }
 812
 813         /**
 814          * Returns whether section editing is supported for the current page.
 815          * Subclasses may override this to replace the default behavior, which is
 816          * to check ContentHandler::supportsSections.
 817          *
 818          * @return bool True if this edit page supports sections, false otherwise.
 819          */
 820         protected function isSectionEditSupported() {
 821                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 822                 return $contentHandler->supportsSections();
 823         }
 824
 825         /**
 826          * This function collects the form data and uses it to populate various member variables.
 827          * @param WebRequest $request
 828          * @throws ErrorPageError
 829          */
 830         function importFormData( &$request ) {
 831                 global $wgContLang, $wgUser;
 832
 833                 # Section edit can come from either the form or a link
 834                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 835
 836                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 837                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 838                 }
 839
 840                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 841
 842                 if ( $request->wasPosted() ) {
 843                         # These fields need to be checked for encoding.
 844                         # Also remove trailing whitespace, but don't remove _initial_
 845                         # whitespace from the text boxes. This may be significant formatting.
 846                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 847                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 848                                 // Skip this if wpTextbox2 has input, it indicates that we came
 849                                 // from a conflict page with raw page text, not a custom form
 850                                 // modified by subclasses
 851                                 $textbox1 = $this->importContentFormData( $request );
 852                                 if ( $textbox1 !== null ) {
 853                                         $this->textbox1 = $textbox1;
 854                                 }
 855                         }
 856
 857                         # Truncate for whole multibyte characters
 858                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 859
 860                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 861                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 862                         # section titles.
 863                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 864
 865                         # Treat sectiontitle the same way as summary.
 866                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 867                         # currently doing double duty as both edit summary and section title. Right now this
 868                         # is just to allow API edits to work around this limitation, but this should be
 869                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 870                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 871                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 872
 873                         $this->edittime = $request->getVal( 'wpEdittime' );
 874                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 875                         $this->starttime = $request->getVal( 'wpStarttime' );
 876
 877                         $undidRev = $request->getInt( 'wpUndidRevision' );
 878                         if ( $undidRev ) {
 879                                 $this->undidRev = $undidRev;
 880                         }
 881
 882                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 883
 884                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 885                                 // wpTextbox1 field is missing, possibly due to being "too big"
 886                                 // according to some filter rules such as Suhosin's setting for
 887                                 // suhosin.request.max_value_length (d'oh)
 888                                 $this->incompleteForm = true;
 889                         } else {
 890                                 // If we receive the last parameter of the request, we can fairly
 891                                 // claim the POST request has not been truncated.
 892
 893                                 // TODO: softened the check for cutover.  Once we determine
 894                                 // that it is safe, we should complete the transition by
 895                                 // removing the "edittime" clause.
 896                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 897                                         && is_null( $this->edittime ) );
 898                         }
 899                         if ( $this->incompleteForm ) {
 900                                 # If the form is incomplete, force to preview.
 901                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 902                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 903                                 $this->preview = true;
 904                         } else {
 905                                 $this->preview = $request->getCheck( 'wpPreview' );
 906                                 $this->diff = $request->getCheck( 'wpDiff' );
 907
 908                                 // Remember whether a save was requested, so we can indicate
 909                                 // if we forced preview due to session failure.
 910                                 $this->mTriedSave = !$this->preview;
 911
 912                                 if ( $this->tokenOk( $request ) ) {
 913                                         # Some browsers will not report any submit button
 914                                         # if the user hits enter in the comment box.
 915                                         # The unmarked state will be assumed to be a save,
 916                                         # if the form seems otherwise complete.
 917                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 918                                 } elseif ( $this->diff ) {
 919                                         # Failed token check, but only requested "Show Changes".
 920                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 921                                 } else {
 922                                         # Page might be a hack attempt posted from
 923                                         # an external site. Preview instead of saving.
 924                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 925                                         $this->preview = true;
 926                                 }
 927                         }
 928                         $this->save = !$this->preview && !$this->diff;
 929                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 930                                 $this->edittime = null;
 931                         }
 932
 933                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 934                                 $this->starttime = null;
 935                         }
 936
 937                         $this->recreate = $request->getCheck( 'wpRecreate' );
 938
 939                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 940                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 941
 942                         # Don't force edit summaries when a user is editing their own user or talk page
 943                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 944                                 && $this->mTitle->getText() == $wgUser->getName()
 945                         ) {
 946                                 $this->allowBlankSummary = true;
 947                         } else {
 948                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 949                                         || !$wgUser->getOption( 'forceeditsummary' );
 950                         }
 951
 952                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 953
 954                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 955                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 956
 957                         $changeTags = $request->getVal( 'wpChangeTags' );
 958                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 959                                 $this->changeTags = [];
 960                         } else {
 961                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 962                                         $changeTags ) ) );
 963                         }
 964                 } else {
 965                         # Not a posted form? Start with nothing.
 966                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 967                         $this->textbox1 = '';
 968                         $this->summary = '';
 969                         $this->sectiontitle = '';
 970                         $this->edittime = '';
 971                         $this->editRevId = null;
 972                         $this->starttime = wfTimestampNow();
 973                         $this->edit = false;
 974                         $this->preview = false;
 975                         $this->save = false;
 976                         $this->diff = false;
 977                         $this->minoredit = false;
 978                         // Watch may be overridden by request parameters
 979                         $this->watchthis = $request->getBool( 'watchthis', false );
 980                         $this->recreate = false;
 981
 982                         // When creating a new section, we can preload a section title by passing it as the
 983                         // preloadtitle parameter in the URL (Bug 13100)
 984                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 985                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 986                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 987                                 $this->summary = $request->getVal( 'preloadtitle' );
 988                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 989                                 $this->summary = $request->getText( 'summary' );
 990                                 if ( $this->summary !== '' ) {
 991                                         $this->hasPresetSummary = true;
 992                                 }
 993                         }
 994
 995                         if ( $request->getVal( 'minor' ) ) {
 996                                 $this->minoredit = true;
 997                         }
 998                 }
 999
1000                 $this->oldid = $request->getInt( 'oldid' );
1001                 $this->parentRevId = $request->getInt( 'parentRevId' );
1002
1003                 $this->bot = $request->getBool( 'bot', true );
1004                 $this->nosummary = $request->getBool( 'nosummary' );
1005
1006                 // May be overridden by revision.
1007                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1008                 // May be overridden by revision.
1009                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1010
1011                 try {
1012                         $handler = ContentHandler::getForModelID( $this->contentModel );
1013                 } catch ( MWUnknownContentModelException $e ) {
1014                         throw new ErrorPageError(
1015                                 'editpage-invalidcontentmodel-title',
1016                                 'editpage-invalidcontentmodel-text',
1017                                 [ $this->contentModel ]
1018                         );
1019                 }
1020
1021                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1022                         throw new ErrorPageError(
1023                                 'editpage-notsupportedcontentformat-title',
1024                                 'editpage-notsupportedcontentformat-text',
1025                                 [ $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) ]
1026                         );
1027                 }
1028
1029                 /**
1030                  * @todo Check if the desired model is allowed in this namespace, and if
1031                  *   a transition from the page's current model to the new model is
1032                  *   allowed.
1033                  */
1034
1035                 $this->editintro = $request->getText( 'editintro',
1036                         // Custom edit intro for new sections
1037                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1038
1039                 // Allow extensions to modify form data
1040                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1041
1042         }
1043
1044         /**
1045          * Subpage overridable method for extracting the page content data from the
1046          * posted form to be placed in $this->textbox1, if using customized input
1047          * this method should be overridden and return the page text that will be used
1048          * for saving, preview parsing and so on...
1049          *
1050          * @param WebRequest $request
1051          * @return string|null
1052          */
1053         protected function importContentFormData( &$request ) {
1054                 return; // Don't do anything, EditPage already extracted wpTextbox1
1055         }
1056
1057         /**
1058          * Initialise form fields in the object
1059          * Called on the first invocation, e.g. when a user clicks an edit link
1060          * @return bool If the requested section is valid
1061          */
1062         function initialiseForm() {
1063                 global $wgUser;
1064                 $this->edittime = $this->page->getTimestamp();
1065                 $this->editRevId = $this->page->getLatest();
1066
1067                 $content = $this->getContentObject( false ); # TODO: track content object?!
1068                 if ( $content === false ) {
1069                         return false;
1070                 }
1071                 $this->textbox1 = $this->toEditText( $content );
1072
1073                 // activate checkboxes if user wants them to be always active
1074                 # Sort out the "watch" checkbox
1075                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1076                         # Watch all edits
1077                         $this->watchthis = true;
1078                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1079                         # Watch creations
1080                         $this->watchthis = true;
1081                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1082                         # Already watched
1083                         $this->watchthis = true;
1084                 }
1085                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1086                         $this->minoredit = true;
1087                 }
1088                 if ( $this->textbox1 === false ) {
1089                         return false;
1090                 }
1091                 return true;
1092         }
1093
1094         /**
1095          * @param Content|null $def_content The default value to return
1096          *
1097          * @return Content|null Content on success, $def_content for invalid sections
1098          *
1099          * @since 1.21
1100          */
1101         protected function getContentObject( $def_content = null ) {
1102                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1103
1104                 $content = false;
1105
1106                 // For message page not locally set, use the i18n message.
1107                 // For other non-existent articles, use preload text if any.
1108                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1109                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1110                                 # If this is a system message, get the default text.
1111                                 $msg = $this->mTitle->getDefaultMessageText();
1112
1113                                 $content = $this->toEditContent( $msg );
1114                         }
1115                         if ( $content === false ) {
1116                                 # If requested, preload some text.
1117                                 $preload = $wgRequest->getVal( 'preload',
1118                                         // Custom preload text for new sections
1119                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1120                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1121
1122                                 $content = $this->getPreloadedContent( $preload, $params );
1123                         }
1124                 // For existing pages, get text based on "undo" or section parameters.
1125                 } else {
1126                         if ( $this->section != '' ) {
1127                                 // Get section edit text (returns $def_text for invalid sections)
1128                                 $orig = $this->getOriginalContent( $wgUser );
1129                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1130
1131                                 if ( !$content ) {
1132                                         $content = $def_content;
1133                                 }
1134                         } else {
1135                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1136                                 $undo = $wgRequest->getInt( 'undo' );
1137
1138                                 if ( $undo > 0 && $undoafter > 0 ) {
1139                                         $undorev = Revision::newFromId( $undo );
1140                                         $oldrev = Revision::newFromId( $undoafter );
1141
1142                                         # Sanity check, make sure it's the right page,
1143                                         # the revisions exist and they were not deleted.
1144                                         # Otherwise, $content will be left as-is.
1145                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1146                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1147                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1148                                         ) {
1149                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1150
1151                                                 if ( $content === false ) {
1152                                                         # Warn the user that something went wrong
1153                                                         $undoMsg = 'failure';
1154                                                 } else {
1155                                                         $oldContent = $this->page->getContent( Revision::RAW );
1156                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1157                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1158                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1159                                                                 // The undo may change content
1160                                                                 // model if its reverting the top
1161                                                                 // edit. This can result in
1162                                                                 // mismatched content model/format.
1163                                                                 $this->contentModel = $newContent->getModel();
1164                                                                 $this->contentFormat = $oldrev->getContentFormat();
1165                                                         }
1166
1167                                                         if ( $newContent->equals( $oldContent ) ) {
1168                                                                 # Tell the user that the undo results in no change,
1169                                                                 # i.e. the revisions were already undone.
1170                                                                 $undoMsg = 'nochange';
1171                                                                 $content = false;
1172                                                         } else {
1173                                                                 # Inform the user of our success and set an automatic edit summary
1174                                                                 $undoMsg = 'success';
1175
1176                                                                 # If we just undid one rev, use an autosummary
1177                                                                 $firstrev = $oldrev->getNext();
1178                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1179                                                                         $userText = $undorev->getUserText();
1180                                                                         if ( $userText === '' ) {
1181                                                                                 $undoSummary = $this->context->msg(
1182                                                                                         'undo-summary-username-hidden',
1183                                                                                         $undo
1184                                                                                 )->inContentLanguage()->text();
1185                                                                         } else {
1186                                                                                 $undoSummary = $this->context->msg(
1187                                                                                         'undo-summary',
1188                                                                                         $undo,
1189                                                                                         $userText
1190                                                                                 )->inContentLanguage()->text();
1191                                                                         }
1192                                                                         if ( $this->summary === '' ) {
1193                                                                                 $this->summary = $undoSummary;
1194                                                                         } else {
1195                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1196                                                                                         ->inContentLanguage()->text() . $this->summary;
1197                                                                         }
1198                                                                         $this->undidRev = $undo;
1199                                                                 }
1200                                                                 $this->formtype = 'diff';
1201                                                         }
1202                                                 }
1203                                         } else {
1204                                                 // Failed basic sanity checks.
1205                                                 // Older revisions may have been removed since the link
1206                                                 // was created, or we may simply have got bogus input.
1207                                                 $undoMsg = 'norev';
1208                                         }
1209
1210                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1211                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1212                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1213                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1214                                 }
1215
1216                                 if ( $content === false ) {
1217                                         $content = $this->getOriginalContent( $wgUser );
1218                                 }
1219                         }
1220                 }
1221
1222                 return $content;
1223         }
1224
1225         /**
1226          * Get the content of the wanted revision, without section extraction.
1227          *
1228          * The result of this function can be used to compare user's input with
1229          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1230          * to the original text of the edit.
1231          *
1232          * This differs from Article::getContent() that when a missing revision is
1233          * encountered the result will be null and not the
1234          * 'missing-revision' message.
1235          *
1236          * @since 1.19
1237          * @param User $user The user to get the revision for
1238          * @return Content|null
1239          */
1240         private function getOriginalContent( User $user ) {
1241                 if ( $this->section == 'new' ) {
1242                         return $this->getCurrentContent();
1243                 }
1244                 $revision = $this->mArticle->getRevisionFetched();
1245                 if ( $revision === null ) {
1246                         if ( !$this->contentModel ) {
1247                                 $this->contentModel = $this->getTitle()->getContentModel();
1248                         }
1249                         $handler = ContentHandler::getForModelID( $this->contentModel );
1250
1251                         return $handler->makeEmptyContent();
1252                 }
1253                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1254                 return $content;
1255         }
1256
1257         /**
1258          * Get the edit's parent revision ID
1259          *
1260          * The "parent" revision is the ancestor that should be recorded in this
1261          * page's revision history.  It is either the revision ID of the in-memory
1262          * article content, or in the case of a 3-way merge in order to rebase
1263          * across a recoverable edit conflict, the ID of the newer revision to
1264          * which we have rebased this page.
1265          *
1266          * @since 1.27
1267          * @return int Revision ID
1268          */
1269         public function getParentRevId() {
1270                 if ( $this->parentRevId ) {
1271                         return $this->parentRevId;
1272                 } else {
1273                         return $this->mArticle->getRevIdFetched();
1274                 }
1275         }
1276
1277         /**
1278          * Get the current content of the page. This is basically similar to
1279          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1280          * content object is returned instead of null.
1281          *
1282          * @since 1.21
1283          * @return Content
1284          */
1285         protected function getCurrentContent() {
1286                 $rev = $this->page->getRevision();
1287                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1288
1289                 if ( $content === false || $content === null ) {
1290                         if ( !$this->contentModel ) {
1291                                 $this->contentModel = $this->getTitle()->getContentModel();
1292                         }
1293                         $handler = ContentHandler::getForModelID( $this->contentModel );
1294
1295                         return $handler->makeEmptyContent();
1296                 } elseif ( !$this->undidRev ) {
1297                         // Content models should always be the same since we error
1298                         // out if they are different before this point (in ->edit()).
1299                         // The exception being, during an undo, the current revision might
1300                         // differ from the prior revision.
1301                         $logger = LoggerFactory::getInstance( 'editpage' );
1302                         if ( $this->contentModel !== $rev->getContentModel() ) {
1303                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1304                                         'prev' => $this->contentModel,
1305                                         'new' => $rev->getContentModel(),
1306                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1307                                         'method' => __METHOD__
1308                                 ] );
1309                                 $this->contentModel = $rev->getContentModel();
1310                         }
1311
1312                         // Given that the content models should match, the current selected
1313                         // format should be supported.
1314                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1315                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1316
1317                                         'prev' => $this->contentFormat,
1318                                         'new' => $rev->getContentFormat(),
1319                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1320                                         'method' => __METHOD__
1321                                 ] );
1322                                 $this->contentFormat = $rev->getContentFormat();
1323                         }
1324                 }
1325                 return $content;
1326         }
1327
1328         /**
1329          * Use this method before edit() to preload some content into the edit box
1330          *
1331          * @param Content $content
1332          *
1333          * @since 1.21
1334          */
1335         public function setPreloadedContent( Content $content ) {
1336                 $this->mPreloadContent = $content;
1337         }
1338
1339         /**
1340          * Get the contents to be preloaded into the box, either set by
1341          * an earlier setPreloadText() or by loading the given page.
1342          *
1343          * @param string $preload Representing the title to preload from.
1344          * @param array $params Parameters to use (interface-message style) in the preloaded text
1345          *
1346          * @return Content
1347          *
1348          * @since 1.21
1349          */
1350         protected function getPreloadedContent( $preload, $params = [] ) {
1351                 global $wgUser;
1352
1353                 if ( !empty( $this->mPreloadContent ) ) {
1354                         return $this->mPreloadContent;
1355                 }
1356
1357                 $handler = ContentHandler::getForModelID( $this->contentModel );
1358
1359                 if ( $preload === '' ) {
1360                         return $handler->makeEmptyContent();
1361                 }
1362
1363                 $title = Title::newFromText( $preload );
1364                 # Check for existence to avoid getting MediaWiki:Noarticletext
1365                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1366                         // TODO: somehow show a warning to the user!
1367                         return $handler->makeEmptyContent();
1368                 }
1369
1370                 $page = WikiPage::factory( $title );
1371                 if ( $page->isRedirect() ) {
1372                         $title = $page->getRedirectTarget();
1373                         # Same as before
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                         $page = WikiPage::factory( $title );
1379                 }
1380
1381                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1382                 $content = $page->getContent( Revision::RAW );
1383
1384                 if ( !$content ) {
1385                         // TODO: somehow show a warning to the user!
1386                         return $handler->makeEmptyContent();
1387                 }
1388
1389                 if ( $content->getModel() !== $handler->getModelID() ) {
1390                         $converted = $content->convert( $handler->getModelID() );
1391
1392                         if ( !$converted ) {
1393                                 // TODO: somehow show a warning to the user!
1394                                 wfDebug( "Attempt to preload incompatible content: " .
1395                                         "can't convert " . $content->getModel() .
1396                                         " to " . $handler->getModelID() );
1397
1398                                 return $handler->makeEmptyContent();
1399                         }
1400
1401                         $content = $converted;
1402                 }
1403
1404                 return $content->preloadTransform( $title, $parserOptions, $params );
1405         }
1406
1407         /**
1408          * Make sure the form isn't faking a user's credentials.
1409          *
1410          * @param WebRequest $request
1411          * @return bool
1412          * @private
1413          */
1414         function tokenOk( &$request ) {
1415                 global $wgUser;
1416                 $token = $request->getVal( 'wpEditToken' );
1417                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1418                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1419                 return $this->mTokenOk;
1420         }
1421
1422         /**
1423          * Sets post-edit cookie indicating the user just saved a particular revision.
1424          *
1425          * This uses a temporary cookie for each revision ID so separate saves will never
1426          * interfere with each other.
1427          *
1428          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1429          * the redirect.  It must be clearable by JavaScript code, so it must not be
1430          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1431          * variable.
1432          *
1433          * If the variable were set on the server, it would be cached, which is unwanted
1434          * since the post-edit state should only apply to the load right after the save.
1435          *
1436          * @param int $statusValue The status value (to check for new article status)
1437          */
1438         protected function setPostEditCookie( $statusValue ) {
1439                 $revisionId = $this->page->getLatest();
1440                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1441
1442                 $val = 'saved';
1443                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1444                         $val = 'created';
1445                 } elseif ( $this->oldid ) {
1446                         $val = 'restored';
1447                 }
1448
1449                 $response = RequestContext::getMain()->getRequest()->response();
1450                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, [
1451                         'httpOnly' => false,
1452                 ] );
1453         }
1454
1455         /**
1456          * Attempt submission
1457          * @param array|bool $resultDetails See docs for $result in internalAttemptSave
1458          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1459          * @return Status The resulting status object.
1460          */
1461         public function attemptSave( &$resultDetails = false ) {
1462                 global $wgUser;
1463
1464                 # Allow bots to exempt some edits from bot flagging
1465                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1466                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1467
1468                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1469
1470                 return $status;
1471         }
1472
1473         /**
1474          * Handle status, such as after attempt save
1475          *
1476          * @param Status $status
1477          * @param array|bool $resultDetails
1478          *
1479          * @throws ErrorPageError
1480          * @return bool False, if output is done, true if rest of the form should be displayed
1481          */
1482         private function handleStatus( Status $status, $resultDetails ) {
1483                 global $wgUser, $wgOut;
1484
1485                 /**
1486                  * @todo FIXME: once the interface for internalAttemptSave() is made
1487                  *   nicer, this should use the message in $status
1488                  */
1489                 if ( $status->value == self::AS_SUCCESS_UPDATE
1490                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1491                 ) {
1492                         $this->didSave = true;
1493                         if ( !$resultDetails['nullEdit'] ) {
1494                                 $this->setPostEditCookie( $status->value );
1495                         }
1496                 }
1497
1498                 // "wpExtraQueryRedirect" is a hidden input to modify
1499                 // after save URL and is not used by actual edit form
1500                 $request = RequestContext::getMain()->getRequest();
1501                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1502
1503                 switch ( $status->value ) {
1504                         case self::AS_HOOK_ERROR_EXPECTED:
1505                         case self::AS_CONTENT_TOO_BIG:
1506                         case self::AS_ARTICLE_WAS_DELETED:
1507                         case self::AS_CONFLICT_DETECTED:
1508                         case self::AS_SUMMARY_NEEDED:
1509                         case self::AS_TEXTBOX_EMPTY:
1510                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1511                         case self::AS_END:
1512                         case self::AS_BLANK_ARTICLE:
1513                         case self::AS_SELF_REDIRECT:
1514                                 return true;
1515
1516                         case self::AS_HOOK_ERROR:
1517                                 return false;
1518
1519                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1520                         case self::AS_PARSE_ERROR:
1521                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1522                                 return true;
1523
1524                         case self::AS_SUCCESS_NEW_ARTICLE:
1525                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1526                                 if ( $extraQueryRedirect ) {
1527                                         if ( $query === '' ) {
1528                                                 $query = $extraQueryRedirect;
1529                                         } else {
1530                                                 $query = $query . '&' . $extraQueryRedirect;
1531                                         }
1532                                 }
1533                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1534                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1535                                 return false;
1536
1537                         case self::AS_SUCCESS_UPDATE:
1538                                 $extraQuery = '';
1539                                 $sectionanchor = $resultDetails['sectionanchor'];
1540
1541                                 // Give extensions a chance to modify URL query on update
1542                                 Hooks::run(
1543                                         'ArticleUpdateBeforeRedirect',
1544                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1545                                 );
1546
1547                                 if ( $resultDetails['redirect'] ) {
1548                                         if ( $extraQuery == '' ) {
1549                                                 $extraQuery = 'redirect=no';
1550                                         } else {
1551                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1552                                         }
1553                                 }
1554                                 if ( $extraQueryRedirect ) {
1555                                         if ( $extraQuery === '' ) {
1556                                                 $extraQuery = $extraQueryRedirect;
1557                                         } else {
1558                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1559                                         }
1560                                 }
1561
1562                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1563                                 return false;
1564
1565                         case self::AS_SPAM_ERROR:
1566                                 $this->spamPageWithContent( $resultDetails['spam'] );
1567                                 return false;
1568
1569                         case self::AS_BLOCKED_PAGE_FOR_USER:
1570                                 throw new UserBlockedError( $wgUser->getBlock() );
1571
1572                         case self::AS_IMAGE_REDIRECT_ANON:
1573                         case self::AS_IMAGE_REDIRECT_LOGGED:
1574                                 throw new PermissionsError( 'upload' );
1575
1576                         case self::AS_READ_ONLY_PAGE_ANON:
1577                         case self::AS_READ_ONLY_PAGE_LOGGED:
1578                                 throw new PermissionsError( 'edit' );
1579
1580                         case self::AS_READ_ONLY_PAGE:
1581                                 throw new ReadOnlyError;
1582
1583                         case self::AS_RATE_LIMITED:
1584                                 throw new ThrottledError();
1585
1586                         case self::AS_NO_CREATE_PERMISSION:
1587                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1588                                 throw new PermissionsError( $permission );
1589
1590                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1591                                 throw new PermissionsError( 'editcontentmodel' );
1592
1593                         default:
1594                                 // We don't recognize $status->value. The only way that can happen
1595                                 // is if an extension hook aborted from inside ArticleSave.
1596                                 // Render the status object into $this->hookError
1597                                 // FIXME this sucks, we should just use the Status object throughout
1598                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1599                                         '</div>';
1600                                 return true;
1601                 }
1602         }
1603
1604         /**
1605          * Run hooks that can filter edits just before they get saved.
1606          *
1607          * @param Content $content The Content to filter.
1608          * @param Status $status For reporting the outcome to the caller
1609          * @param User $user The user performing the edit
1610          *
1611          * @return bool
1612          */
1613         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1614                 // Run old style post-section-merge edit filter
1615                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1616                         [ $this, $content, &$this->hookError, $this->summary ],
1617                         '1.21'
1618                 ) ) {
1619                         # Error messages etc. could be handled within the hook...
1620                         $status->fatal( 'hookaborted' );
1621                         $status->value = self::AS_HOOK_ERROR;
1622                         return false;
1623                 } elseif ( $this->hookError != '' ) {
1624                         # ...or the hook could be expecting us to produce an error
1625                         $status->fatal( 'hookaborted' );
1626                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1627                         return false;
1628                 }
1629
1630                 // Run new style post-section-merge edit filter
1631                 if ( !Hooks::run( 'EditFilterMergedContent',
1632                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1633                                 $user, $this->minoredit ] )
1634                 ) {
1635                         # Error messages etc. could be handled within the hook...
1636                         if ( $status->isGood() ) {
1637                                 $status->fatal( 'hookaborted' );
1638                                 // Not setting $this->hookError here is a hack to allow the hook
1639                                 // to cause a return to the edit page without $this->hookError
1640                                 // being set. This is used by ConfirmEdit to display a captcha
1641                                 // without any error message cruft.
1642                         } else {
1643                                 $this->hookError = $status->getWikiText();
1644                         }
1645                         // Use the existing $status->value if the hook set it
1646                         if ( !$status->value ) {
1647                                 $status->value = self::AS_HOOK_ERROR;
1648                         }
1649                         return false;
1650                 } elseif ( !$status->isOK() ) {
1651                         # ...or the hook could be expecting us to produce an error
1652                         // FIXME this sucks, we should just use the Status object throughout
1653                         $this->hookError = $status->getWikiText();
1654                         $status->fatal( 'hookaborted' );
1655                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1656                         return false;
1657                 }
1658
1659                 return true;
1660         }
1661
1662         /**
1663          * Return the summary to be used for a new section.
1664          *
1665          * @param string $sectionanchor Set to the section anchor text
1666          * @return string
1667          */
1668         private function newSectionSummary( &$sectionanchor = null ) {
1669                 global $wgParser;
1670
1671                 if ( $this->sectiontitle !== '' ) {
1672                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1673                         // If no edit summary was specified, create one automatically from the section
1674                         // title and have it link to the new section. Otherwise, respect the summary as
1675                         // passed.
1676                         if ( $this->summary === '' ) {
1677                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1678                                 return $this->context->msg( 'newsectionsummary' )
1679                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1680                         }
1681                 } elseif ( $this->summary !== '' ) {
1682                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1683                         # This is a new section, so create a link to the new section
1684                         # in the revision summary.
1685                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1686                         return $this->context->msg( 'newsectionsummary' )
1687                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1688                 }
1689                 return $this->summary;
1690         }
1691
1692         /**
1693          * Attempt submission (no UI)
1694          *
1695          * @param array $result Array to add statuses to, currently with the
1696          *   possible keys:
1697          *   - spam (string): Spam string from content if any spam is detected by
1698          *     matchSpamRegex.
1699          *   - sectionanchor (string): Section anchor for a section save.
1700          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1701          *     false otherwise.
1702          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1703          *     revision is a redirect.
1704          * @param bool $bot True if edit is being made under the bot right.
1705          *
1706          * @return Status Status object, possibly with a message, but always with
1707          *   one of the AS_* constants in $status->value,
1708          *
1709          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1710          *   various error display idiosyncrasies. There are also lots of cases
1711          *   where error metadata is set in the object and retrieved later instead
1712          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1713          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1714          * time.
1715          */
1716         function internalAttemptSave( &$result, $bot = false ) {
1717                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1718                 global $wgContentHandlerUseDB;
1719
1720                 $status = Status::newGood();
1721
1722                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1723                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1724                         $status->fatal( 'hookaborted' );
1725                         $status->value = self::AS_HOOK_ERROR;
1726                         return $status;
1727                 }
1728
1729                 $spam = $wgRequest->getText( 'wpAntispam' );
1730                 if ( $spam !== '' ) {
1731                         wfDebugLog(
1732                                 'SimpleAntiSpam',
1733                                 $wgUser->getName() .
1734                                 ' editing "' .
1735                                 $this->mTitle->getPrefixedText() .
1736                                 '" submitted bogus field "' .
1737                                 $spam .
1738                                 '"'
1739                         );
1740                         $status->fatal( 'spamprotectionmatch', false );
1741                         $status->value = self::AS_SPAM_ERROR;
1742                         return $status;
1743                 }
1744
1745                 try {
1746                         # Construct Content object
1747                         $textbox_content = $this->toEditContent( $this->textbox1 );
1748                 } catch ( MWContentSerializationException $ex ) {
1749                         $status->fatal(
1750                                 'content-failed-to-parse',
1751                                 $this->contentModel,
1752                                 $this->contentFormat,
1753                                 $ex->getMessage()
1754                         );
1755                         $status->value = self::AS_PARSE_ERROR;
1756                         return $status;
1757                 }
1758
1759                 # Check image redirect
1760                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1761                         $textbox_content->isRedirect() &&
1762                         !$wgUser->isAllowed( 'upload' )
1763                 ) {
1764                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1765                                 $status->setResult( false, $code );
1766
1767                                 return $status;
1768                 }
1769
1770                 # Check for spam
1771                 $match = self::matchSummarySpamRegex( $this->summary );
1772                 if ( $match === false && $this->section == 'new' ) {
1773                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1774                         # regular summaries, it is added to the actual wikitext.
1775                         if ( $this->sectiontitle !== '' ) {
1776                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1777                                 $match = self::matchSpamRegex( $this->sectiontitle );
1778                         } else {
1779                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1780                                 # is used with the 'summary' parameter.
1781                                 $match = self::matchSpamRegex( $this->summary );
1782                         }
1783                 }
1784                 if ( $match === false ) {
1785                         $match = self::matchSpamRegex( $this->textbox1 );
1786                 }
1787                 if ( $match !== false ) {
1788                         $result['spam'] = $match;
1789                         $ip = $wgRequest->getIP();
1790                         $pdbk = $this->mTitle->getPrefixedDBkey();
1791                         $match = str_replace( "\n", '', $match );
1792                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1793                         $status->fatal( 'spamprotectionmatch', $match );
1794                         $status->value = self::AS_SPAM_ERROR;
1795                         return $status;
1796                 }
1797                 if ( !Hooks::run(
1798                         'EditFilter',
1799                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1800                 ) {
1801                         # Error messages etc. could be handled within the hook...
1802                         $status->fatal( 'hookaborted' );
1803                         $status->value = self::AS_HOOK_ERROR;
1804                         return $status;
1805                 } elseif ( $this->hookError != '' ) {
1806                         # ...or the hook could be expecting us to produce an error
1807                         $status->fatal( 'hookaborted' );
1808                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1809                         return $status;
1810                 }
1811
1812                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1813                         // Auto-block user's IP if the account was "hard" blocked
1814                         if ( !wfReadOnly() ) {
1815                                 $wgUser->spreadAnyEditBlock();
1816                         }
1817                         # Check block state against master, thus 'false'.
1818                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1819                         return $status;
1820                 }
1821
1822                 $this->contentLength = strlen( $this->textbox1 );
1823                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1824                         // Error will be displayed by showEditForm()
1825                         $this->tooBig = true;
1826                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1827                         return $status;
1828                 }
1829
1830                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1831                         if ( $wgUser->isAnon() ) {
1832                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1833                                 return $status;
1834                         } else {
1835                                 $status->fatal( 'readonlytext' );
1836                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1837                                 return $status;
1838                         }
1839                 }
1840
1841                 $changingContentModel = false;
1842                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1843                         if ( !$wgContentHandlerUseDB ) {
1844                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1845                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1846                                 return $status;
1847                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1848                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1849                                 return $status;
1850                         }
1851                         // Make sure the user can edit the page under the new content model too
1852                         $titleWithNewContentModel = clone $this->mTitle;
1853                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1854                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1855                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1856                         ) {
1857                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1858                                 return $status;
1859                         }
1860
1861                         $changingContentModel = true;
1862                         $oldContentModel = $this->mTitle->getContentModel();
1863                 }
1864
1865                 if ( $this->changeTags ) {
1866                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1867                                 $this->changeTags, $wgUser );
1868                         if ( !$changeTagsStatus->isOK() ) {
1869                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1870                                 return $changeTagsStatus;
1871                         }
1872                 }
1873
1874                 if ( wfReadOnly() ) {
1875                         $status->fatal( 'readonlytext' );
1876                         $status->value = self::AS_READ_ONLY_PAGE;
1877                         return $status;
1878                 }
1879                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1880                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1881                 ) {
1882                         $status->fatal( 'actionthrottledtext' );
1883                         $status->value = self::AS_RATE_LIMITED;
1884                         return $status;
1885                 }
1886
1887                 # If the article has been deleted while editing, don't save it without
1888                 # confirmation
1889                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1890                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1891                         return $status;
1892                 }
1893
1894                 # Load the page data from the master. If anything changes in the meantime,
1895                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1896                 $this->page->loadPageData( 'fromdbmaster' );
1897                 $new = !$this->page->exists();
1898
1899                 if ( $new ) {
1900                         // Late check for create permission, just in case *PARANOIA*
1901                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1902                                 $status->fatal( 'nocreatetext' );
1903                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1904                                 wfDebug( __METHOD__ . ": no create permission\n" );
1905                                 return $status;
1906                         }
1907
1908                         // Don't save a new page if it's blank or if it's a MediaWiki:
1909                         // message with content equivalent to default (allow empty pages
1910                         // in this case to disable messages, see bug 50124)
1911                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1912                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1913                                 $defaultText = $defaultMessageText;
1914                         } else {
1915                                 $defaultText = '';
1916                         }
1917
1918                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1919                                 $this->blankArticle = true;
1920                                 $status->fatal( 'blankarticle' );
1921                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1922                                 return $status;
1923                         }
1924
1925                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1926                                 return $status;
1927                         }
1928
1929                         $content = $textbox_content;
1930
1931                         $result['sectionanchor'] = '';
1932                         if ( $this->section == 'new' ) {
1933                                 if ( $this->sectiontitle !== '' ) {
1934                                         // Insert the section title above the content.
1935                                         $content = $content->addSectionHeader( $this->sectiontitle );
1936                                 } elseif ( $this->summary !== '' ) {
1937                                         // Insert the section title above the content.
1938                                         $content = $content->addSectionHeader( $this->summary );
1939                                 }
1940                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1941                         }
1942
1943                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1944
1945                 } else { # not $new
1946
1947                         # Article exists. Check for edit conflict.
1948
1949                         $this->page->clear(); # Force reload of dates, etc.
1950                         $timestamp = $this->page->getTimestamp();
1951                         $latest = $this->page->getLatest();
1952
1953                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1954
1955                         // Check editRevId if set, which handles same-second timestamp collisions
1956                         if ( $timestamp != $this->edittime
1957                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1958                         ) {
1959                                 $this->isConflict = true;
1960                                 if ( $this->section == 'new' ) {
1961                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1962                                                 $this->page->getComment() == $this->newSectionSummary()
1963                                         ) {
1964                                                 // Probably a duplicate submission of a new comment.
1965                                                 // This can happen when CDN resends a request after
1966                                                 // a timeout but the first one actually went through.
1967                                                 wfDebug( __METHOD__
1968                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1969                                         } else {
1970                                                 // New comment; suppress conflict.
1971                                                 $this->isConflict = false;
1972                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1973                                         }
1974                                 } elseif ( $this->section == ''
1975                                         && Revision::userWasLastToEdit(
1976                                                 DB_MASTER, $this->mTitle->getArticleID(),
1977                                                 $wgUser->getId(), $this->edittime
1978                                         )
1979                                 ) {
1980                                         # Suppress edit conflict with self, except for section edits where merging is required.
1981                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1982                                         $this->isConflict = false;
1983                                 }
1984                         }
1985
1986                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1987                         if ( $this->sectiontitle !== '' ) {
1988                                 $sectionTitle = $this->sectiontitle;
1989                         } else {
1990                                 $sectionTitle = $this->summary;
1991                         }
1992
1993                         $content = null;
1994
1995                         if ( $this->isConflict ) {
1996                                 wfDebug( __METHOD__
1997                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1998                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
1999                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2000                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2001                                 if ( $this->editRevId !== null ) {
2002                                         $content = $this->page->replaceSectionAtRev(
2003                                                 $this->section,
2004                                                 $textbox_content,
2005                                                 $sectionTitle,
2006                                                 $this->editRevId
2007                                         );
2008                                 } else {
2009                                         $content = $this->page->replaceSectionContent(
2010                                                 $this->section,
2011                                                 $textbox_content,
2012                                                 $sectionTitle,
2013                                                 $this->edittime
2014                                         );
2015                                 }
2016                         } else {
2017                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2018                                 $content = $this->page->replaceSectionContent(
2019                                         $this->section,
2020                                         $textbox_content,
2021                                         $sectionTitle
2022                                 );
2023                         }
2024
2025                         if ( is_null( $content ) ) {
2026                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2027                                 $this->isConflict = true;
2028                                 $content = $textbox_content; // do not try to merge here!
2029                         } elseif ( $this->isConflict ) {
2030                                 # Attempt merge
2031                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2032                                         // Successful merge! Maybe we should tell the user the good news?
2033                                         $this->isConflict = false;
2034                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2035                                 } else {
2036                                         $this->section = '';
2037                                         $this->textbox1 = ContentHandler::getContentText( $content );
2038                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2039                                 }
2040                         }
2041
2042                         if ( $this->isConflict ) {
2043                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2044                                 return $status;
2045                         }
2046
2047                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2048                                 return $status;
2049                         }
2050
2051                         if ( $this->section == 'new' ) {
2052                                 // Handle the user preference to force summaries here
2053                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2054                                         $this->missingSummary = true;
2055                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2056                                         $status->value = self::AS_SUMMARY_NEEDED;
2057                                         return $status;
2058                                 }
2059
2060                                 // Do not allow the user to post an empty comment
2061                                 if ( $this->textbox1 == '' ) {
2062                                         $this->missingComment = true;
2063                                         $status->fatal( 'missingcommenttext' );
2064                                         $status->value = self::AS_TEXTBOX_EMPTY;
2065                                         return $status;
2066                                 }
2067                         } elseif ( !$this->allowBlankSummary
2068                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2069                                 && !$content->isRedirect()
2070                                 && md5( $this->summary ) == $this->autoSumm
2071                         ) {
2072                                 $this->missingSummary = true;
2073                                 $status->fatal( 'missingsummary' );
2074                                 $status->value = self::AS_SUMMARY_NEEDED;
2075                                 return $status;
2076                         }
2077
2078                         # All's well
2079                         $sectionanchor = '';
2080                         if ( $this->section == 'new' ) {
2081                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2082                         } elseif ( $this->section != '' ) {
2083                                 # Try to get a section anchor from the section source, redirect
2084                                 # to edited section if header found.
2085                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2086                                 # for duplicate heading checking and maybe parsing.
2087                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2088                                 # We can't deal with anchors, includes, html etc in the header for now,
2089                                 # headline would need to be parsed to improve this.
2090                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2091                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
2092                                 }
2093                         }
2094                         $result['sectionanchor'] = $sectionanchor;
2095
2096                         // Save errors may fall down to the edit form, but we've now
2097                         // merged the section into full text. Clear the section field
2098                         // so that later submission of conflict forms won't try to
2099                         // replace that into a duplicated mess.
2100                         $this->textbox1 = $this->toEditText( $content );
2101                         $this->section = '';
2102
2103                         $status->value = self::AS_SUCCESS_UPDATE;
2104                 }
2105
2106                 if ( !$this->allowSelfRedirect
2107                         && $content->isRedirect()
2108                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2109                 ) {
2110                         // If the page already redirects to itself, don't warn.
2111                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2112                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2113                                 $this->selfRedirect = true;
2114                                 $status->fatal( 'selfredirect' );
2115                                 $status->value = self::AS_SELF_REDIRECT;
2116                                 return $status;
2117                         }
2118                 }
2119
2120                 // Check for length errors again now that the section is merged in
2121                 $this->contentLength = strlen( $this->toEditText( $content ) );
2122                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2123                         $this->tooBig = true;
2124                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2125                         return $status;
2126                 }
2127
2128                 $flags = EDIT_AUTOSUMMARY |
2129                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2130                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2131                         ( $bot ? EDIT_FORCE_BOT : 0 );
2132
2133                 $doEditStatus = $this->page->doEditContent(
2134                         $content,
2135                         $this->summary,
2136                         $flags,
2137                         false,
2138                         $wgUser,
2139                         $content->getDefaultFormat(),
2140                         $this->changeTags
2141                 );
2142
2143                 if ( !$doEditStatus->isOK() ) {
2144                         // Failure from doEdit()
2145                         // Show the edit conflict page for certain recognized errors from doEdit(),
2146                         // but don't show it for errors from extension hooks
2147                         $errors = $doEditStatus->getErrorsArray();
2148                         if ( in_array( $errors[0][0],
2149                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2150                         ) {
2151                                 $this->isConflict = true;
2152                                 // Destroys data doEdit() put in $status->value but who cares
2153                                 $doEditStatus->value = self::AS_END;
2154                         }
2155                         return $doEditStatus;
2156                 }
2157
2158                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2159                 if ( $result['nullEdit'] ) {
2160                         // We don't know if it was a null edit until now, so increment here
2161                         $wgUser->pingLimiter( 'linkpurge' );
2162                 }
2163                 $result['redirect'] = $content->isRedirect();
2164
2165                 $this->updateWatchlist();
2166
2167                 // If the content model changed, add a log entry
2168                 if ( $changingContentModel ) {
2169                         $this->addContentModelChangeLogEntry(
2170                                 $wgUser,
2171                                 $new ? false : $oldContentModel,
2172                                 $this->contentModel,
2173                                 $this->summary
2174                         );
2175                 }
2176
2177                 return $status;
2178         }
2179
2180         /**
2181          * @param User $user
2182          * @param string|false $oldModel false if the page is being newly created
2183          * @param string $newModel
2184          * @param string $reason
2185          */
2186         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2187                 $new = $oldModel === false;
2188                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2189                 $log->setPerformer( $user );
2190                 $log->setTarget( $this->mTitle );
2191                 $log->setComment( $reason );
2192                 $log->setParameters( [
2193                         '4::oldmodel' => $oldModel,
2194                         '5::newmodel' => $newModel
2195                 ] );
2196                 $logid = $log->insert();
2197                 $log->publish( $logid );
2198         }
2199
2200         /**
2201          * Register the change of watch status
2202          */
2203         protected function updateWatchlist() {
2204                 global $wgUser;
2205
2206                 if ( !$wgUser->isLoggedIn() ) {
2207                         return;
2208                 }
2209
2210                 $user = $wgUser;
2211                 $title = $this->mTitle;
2212                 $watch = $this->watchthis;
2213                 // Do this in its own transaction to reduce contention...
2214                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2215                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2216                                 return; // nothing to change
2217                         }
2218                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2219                 } );
2220         }
2221
2222         /**
2223          * Attempts to do 3-way merge of edit content with a base revision
2224          * and current content, in case of edit conflict, in whichever way appropriate
2225          * for the content type.
2226          *
2227          * @since 1.21
2228          *
2229          * @param Content $editContent
2230          *
2231          * @return bool
2232          */
2233         private function mergeChangesIntoContent( &$editContent ) {
2234
2235                 $db = wfGetDB( DB_MASTER );
2236
2237                 // This is the revision the editor started from
2238                 $baseRevision = $this->getBaseRevision();
2239                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2240
2241                 if ( is_null( $baseContent ) ) {
2242                         return false;
2243                 }
2244
2245                 // The current state, we want to merge updates into it
2246                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2247                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2248
2249                 if ( is_null( $currentContent ) ) {
2250                         return false;
2251                 }
2252
2253                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2254
2255                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2256
2257                 if ( $result ) {
2258                         $editContent = $result;
2259                         // Update parentRevId to what we just merged.
2260                         $this->parentRevId = $currentRevision->getId();
2261                         return true;
2262                 }
2263
2264                 return false;
2265         }
2266
2267         /**
2268          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2269          *        one might think of X as the "base revision", which is NOT what this returns.
2270          * @return Revision Current version when the edit was started
2271          */
2272         function getBaseRevision() {
2273                 if ( !$this->mBaseRevision ) {
2274                         $db = wfGetDB( DB_MASTER );
2275                         $this->mBaseRevision = $this->editRevId
2276                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2277                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2278                 }
2279                 return $this->mBaseRevision;
2280         }
2281
2282         /**
2283          * Check given input text against $wgSpamRegex, and return the text of the first match.
2284          *
2285          * @param string $text
2286          *
2287          * @return string|bool Matching string or false
2288          */
2289         public static function matchSpamRegex( $text ) {
2290                 global $wgSpamRegex;
2291                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2292                 $regexes = (array)$wgSpamRegex;
2293                 return self::matchSpamRegexInternal( $text, $regexes );
2294         }
2295
2296         /**
2297          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2298          *
2299          * @param string $text
2300          *
2301          * @return string|bool Matching string or false
2302          */
2303         public static function matchSummarySpamRegex( $text ) {
2304                 global $wgSummarySpamRegex;
2305                 $regexes = (array)$wgSummarySpamRegex;
2306                 return self::matchSpamRegexInternal( $text, $regexes );
2307         }
2308
2309         /**
2310          * @param string $text
2311          * @param array $regexes
2312          * @return bool|string
2313          */
2314         protected static function matchSpamRegexInternal( $text, $regexes ) {
2315                 foreach ( $regexes as $regex ) {
2316                         $matches = [];
2317                         if ( preg_match( $regex, $text, $matches ) ) {
2318                                 return $matches[0];
2319                         }
2320                 }
2321                 return false;
2322         }
2323
2324         function setHeaders() {
2325                 global $wgOut, $wgUser, $wgAjaxEditStash;
2326
2327                 $wgOut->addModules( 'mediawiki.action.edit' );
2328                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2329
2330                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2331                         // The addition of default buttons is handled by getEditToolbar() which
2332                         // has its own dependency on this module. The call here ensures the module
2333                         // is loaded in time (it has position "top") for other modules to register
2334                         // buttons (e.g. extensions, gadgets, user scripts).
2335                         $wgOut->addModules( 'mediawiki.toolbar' );
2336                 }
2337
2338                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2339                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2340                 }
2341
2342                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2343                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2344                 }
2345
2346                 # Enabled article-related sidebar, toplinks, etc.
2347                 $wgOut->setArticleRelated( true );
2348
2349                 $contextTitle = $this->getContextTitle();
2350                 if ( $this->isConflict ) {
2351                         $msg = 'editconflict';
2352                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2353                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2354                 } else {
2355                         $msg = $contextTitle->exists()
2356                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2357                                         && $contextTitle->getDefaultMessageText() !== false
2358                                 )
2359                                 ? 'editing'
2360                                 : 'creating';
2361                 }
2362
2363                 # Use the title defined by DISPLAYTITLE magic word when present
2364                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2365                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2366                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2367                 if ( $displayTitle === false ) {
2368                         $displayTitle = $contextTitle->getPrefixedText();
2369                 }
2370                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2371                 # Transmit the name of the message to JavaScript for live preview
2372                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2373                 $wgOut->addJsConfigVars( [
2374                         'wgEditMessage' => $msg,
2375                         'wgAjaxEditStash' => $wgAjaxEditStash,
2376                 ] );
2377         }
2378
2379         /**
2380          * Show all applicable editing introductions
2381          */
2382         protected function showIntro() {
2383                 global $wgOut, $wgUser;
2384                 if ( $this->suppressIntro ) {
2385                         return;
2386                 }
2387
2388                 $namespace = $this->mTitle->getNamespace();
2389
2390                 if ( $namespace == NS_MEDIAWIKI ) {
2391                         # Show a warning if editing an interface message
2392                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2393                         # If this is a default message (but not css or js),
2394                         # show a hint that it is translatable on translatewiki.net
2395                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2396                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2397                         ) {
2398                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2399                                 if ( $defaultMessageText !== false ) {
2400                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2401                                                 'translateinterface' );
2402                                 }
2403                         }
2404                 } elseif ( $namespace == NS_FILE ) {
2405                         # Show a hint to shared repo
2406                         $file = wfFindFile( $this->mTitle );
2407                         if ( $file && !$file->isLocal() ) {
2408                                 $descUrl = $file->getDescriptionUrl();
2409                                 # there must be a description url to show a hint to shared repo
2410                                 if ( $descUrl ) {
2411                                         if ( !$this->mTitle->exists() ) {
2412                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2413                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2414                                                 ] );
2415                                         } else {
2416                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2417                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2418                                                 ] );
2419                                         }
2420                                 }
2421                         }
2422                 }
2423
2424                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2425                 # Show log extract when the user is currently blocked
2426                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2427                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2428                         $user = User::newFromName( $username, false /* allow IP users*/ );
2429                         $ip = User::isIP( $username );
2430                         $block = Block::newFromTarget( $user, $user );
2431                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2432                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2433                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2434                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2435                                 # Show log extract if the user is currently blocked
2436                                 LogEventsList::showLogExtract(
2437                                         $wgOut,
2438                                         'block',
2439                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2440                                         '',
2441                                         [
2442                                                 'lim' => 1,
2443                                                 'showIfEmpty' => false,
2444                                                 'msgKey' => [
2445                                                         'blocked-notice-logextract',
2446                                                         $user->getName() # Support GENDER in notice
2447                                                 ]
2448                                         ]
2449                                 );
2450                         }
2451                 }
2452                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2453                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2454                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2455                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2456                         ) );
2457                         if ( $wgUser->isLoggedIn() ) {
2458                                 $wgOut->wrapWikiMsg(
2459                                         // Suppress the external link icon, consider the help url an internal one
2460                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2461                                         [
2462                                                 'newarticletext',
2463                                                 $helpLink
2464                                         ]
2465                                 );
2466                         } else {
2467                                 $wgOut->wrapWikiMsg(
2468                                         // Suppress the external link icon, consider the help url an internal one
2469                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2470                                         [
2471                                                 'newarticletextanon',
2472                                                 $helpLink
2473                                         ]
2474                                 );
2475                         }
2476                 }
2477                 # Give a notice if the user is editing a deleted/moved page...
2478                 if ( !$this->mTitle->exists() ) {
2479                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2480                                 '',
2481                                 [
2482                                         'lim' => 10,
2483                                         'conds' => [ "log_action != 'revision'" ],
2484                                         'showIfEmpty' => false,
2485                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2486                                 ]
2487                         );
2488                 }
2489         }
2490
2491         /**
2492          * Attempt to show a custom editing introduction, if supplied
2493          *
2494          * @return bool
2495          */
2496         protected function showCustomIntro() {
2497                 if ( $this->editintro ) {
2498                         $title = Title::newFromText( $this->editintro );
2499                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2500                                 global $wgOut;
2501                                 // Added using template syntax, to take <noinclude>'s into account.
2502                                 $wgOut->addWikiTextTitleTidy(
2503                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2504                                         $this->mTitle
2505                                 );
2506                                 return true;
2507                         }
2508                 }
2509                 return false;
2510         }
2511
2512         /**
2513          * Gets an editable textual representation of $content.
2514          * The textual representation can be turned by into a Content object by the
2515          * toEditContent() method.
2516          *
2517          * If $content is null or false or a string, $content is returned unchanged.
2518          *
2519          * If the given Content object is not of a type that can be edited using
2520          * the text base EditPage, an exception will be raised. Set
2521          * $this->allowNonTextContent to true to allow editing of non-textual
2522          * content.
2523          *
2524          * @param Content|null|bool|string $content
2525          * @return string The editable text form of the content.
2526          *
2527          * @throws MWException If $content is not an instance of TextContent and
2528          *   $this->allowNonTextContent is not true.
2529          */
2530         protected function toEditText( $content ) {
2531                 if ( $content === null || $content === false || is_string( $content ) ) {
2532                         return $content;
2533                 }
2534
2535                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2536                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2537                 }
2538
2539                 return $content->serialize( $this->contentFormat );
2540         }
2541
2542         /**
2543          * Turns the given text into a Content object by unserializing it.
2544          *
2545          * If the resulting Content object is not of a type that can be edited using
2546          * the text base EditPage, an exception will be raised. Set
2547          * $this->allowNonTextContent to true to allow editing of non-textual
2548          * content.
2549          *
2550          * @param string|null|bool $text Text to unserialize
2551          * @return Content|bool|null The content object created from $text. If $text was false
2552          *   or null, false resp. null will be  returned instead.
2553          *
2554          * @throws MWException If unserializing the text results in a Content
2555          *   object that is not an instance of TextContent and
2556          *   $this->allowNonTextContent is not true.
2557          */
2558         protected function toEditContent( $text ) {
2559                 if ( $text === false || $text === null ) {
2560                         return $text;
2561                 }
2562
2563                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2564                         $this->contentModel, $this->contentFormat );
2565
2566                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2567                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2568                 }
2569
2570                 return $content;
2571         }
2572
2573         /**
2574          * Send the edit form and related headers to $wgOut
2575          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2576          *     during form output near the top, for captchas and the like.
2577          *
2578          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2579          * use the EditPage::showEditForm:fields hook instead.
2580          */
2581         function showEditForm( $formCallback = null ) {
2582                 global $wgOut, $wgUser;
2583
2584                 # need to parse the preview early so that we know which templates are used,
2585                 # otherwise users with "show preview after edit box" will get a blank list
2586                 # we parse this near the beginning so that setHeaders can do the title
2587                 # setting work instead of leaving it in getPreviewText
2588                 $previewOutput = '';
2589                 if ( $this->formtype == 'preview' ) {
2590                         $previewOutput = $this->getPreviewText();
2591                 }
2592
2593                 Hooks::run( 'EditPage::showEditForm:initial', [ &$this, &$wgOut ] );
2594
2595                 $this->setHeaders();
2596
2597                 if ( $this->showHeader() === false ) {
2598                         return;
2599                 }
2600
2601                 $wgOut->addHTML( $this->editFormPageTop );
2602
2603                 if ( $wgUser->getOption( 'previewontop' ) ) {
2604                         $this->displayPreviewArea( $previewOutput, true );
2605                 }
2606
2607                 $wgOut->addHTML( $this->editFormTextTop );
2608
2609                 $showToolbar = true;
2610                 if ( $this->wasDeletedSinceLastEdit() ) {
2611                         if ( $this->formtype == 'save' ) {
2612                                 // Hide the toolbar and edit area, user can click preview to get it back
2613                                 // Add an confirmation checkbox and explanation.
2614                                 $showToolbar = false;
2615                         } else {
2616                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2617                                         'deletedwhileediting' );
2618                         }
2619                 }
2620
2621                 // @todo add EditForm plugin interface and use it here!
2622                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2623                 $wgOut->addHTML( Html::openElement(
2624                         'form',
2625                         [
2626                                 'id' => self::EDITFORM_ID,
2627                                 'name' => self::EDITFORM_ID,
2628                                 'method' => 'post',
2629                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2630                                 'enctype' => 'multipart/form-data'
2631                         ]
2632                 ) );
2633
2634                 if ( is_callable( $formCallback ) ) {
2635                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2636                         call_user_func_array( $formCallback, [ &$wgOut ] );
2637                 }
2638
2639                 // Add an empty field to trip up spambots
2640                 $wgOut->addHTML(
2641                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2642                         . Html::rawElement(
2643                                 'label',
2644                                 [ 'for' => 'wpAntispam' ],
2645                                 $this->context->msg( 'simpleantispam-label' )->parse()
2646                         )
2647                         . Xml::element(
2648                                 'input',
2649                                 [
2650                                         'type' => 'text',
2651                                         'name' => 'wpAntispam',
2652                                         'id' => 'wpAntispam',
2653                                         'value' => ''
2654                                 ]
2655                         )
2656                         . Xml::closeElement( 'div' )
2657                 );
2658
2659                 Hooks::run( 'EditPage::showEditForm:fields', [ &$this, &$wgOut ] );
2660
2661                 // Put these up at the top to ensure they aren't lost on early form submission
2662                 $this->showFormBeforeText();
2663
2664                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2665                         $username = $this->lastDelete->user_name;
2666                         $comment = $this->lastDelete->log_comment;
2667
2668                         // It is better to not parse the comment at all than to have templates expanded in the middle
2669                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2670                         $key = $comment === ''
2671                                 ? 'confirmrecreate-noreason'
2672                                 : 'confirmrecreate';
2673                         $wgOut->addHTML(
2674                                 '<div class="mw-confirm-recreate">' .
2675                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2676                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2677                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2678                                 ) .
2679                                 '</div>'
2680                         );
2681                 }
2682
2683                 # When the summary is hidden, also hide them on preview/show changes
2684                 if ( $this->nosummary ) {
2685                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2686                 }
2687
2688                 # If a blank edit summary was previously provided, and the appropriate
2689                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2690                 # user being bounced back more than once in the event that a summary
2691                 # is not required.
2692                 # ####
2693                 # For a bit more sophisticated detection of blank summaries, hash the
2694                 # automatic one and pass that in the hidden field wpAutoSummary.
2695                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2696                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2697                 }
2698
2699                 if ( $this->undidRev ) {
2700                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2701                 }
2702
2703                 if ( $this->selfRedirect ) {
2704                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2705                 }
2706
2707                 if ( $this->hasPresetSummary ) {
2708                         // If a summary has been preset using &summary= we don't want to prompt for
2709                         // a different summary. Only prompt for a summary if the summary is blanked.
2710                         // (Bug 17416)
2711                         $this->autoSumm = md5( '' );
2712                 }
2713
2714                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2715                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2716
2717                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2718                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2719
2720                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2721                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2722
2723                 if ( $this->section == 'new' ) {
2724                         $this->showSummaryInput( true, $this->summary );
2725                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2726                 }
2727
2728                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2729
2730                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2731                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2732                 }
2733
2734                 if ( $this->blankArticle ) {
2735                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2736                 }
2737
2738                 if ( $this->isConflict ) {
2739                         // In an edit conflict bypass the overridable content form method
2740                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2741                         // resolved between page source edits and custom ui edits using the
2742                         // custom edit ui.
2743                         $this->textbox2 = $this->textbox1;
2744
2745                         $content = $this->getCurrentContent();
2746                         $this->textbox1 = $this->toEditText( $content );
2747
2748                         $this->showTextbox1();
2749                 } else {
2750                         $this->showContentForm();
2751                 }
2752
2753                 $wgOut->addHTML( $this->editFormTextAfterContent );
2754
2755                 $this->showStandardInputs();
2756
2757                 $this->showFormAfterText();
2758
2759                 $this->showTosSummary();
2760
2761                 $this->showEditTools();
2762
2763                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2764
2765                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2766
2767                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2768                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2769
2770                 if ( $this->mParserOutput ) {
2771                         $wgOut->setLimitReportData( $this->mParserOutput->getLimitReportData() );
2772                 }
2773
2774                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2775
2776                 if ( $this->isConflict ) {
2777                         try {
2778                                 $this->showConflict();
2779                         } catch ( MWContentSerializationException $ex ) {
2780                                 // this can't really happen, but be nice if it does.
2781                                 $msg = $this->context->msg(
2782                                         'content-failed-to-parse',
2783                                         $this->contentModel,
2784                                         $this->contentFormat,
2785                                         $ex->getMessage()
2786                                 );
2787                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2788                         }
2789                 }
2790
2791                 // Set a hidden field so JS knows what edit form mode we are in
2792                 if ( $this->isConflict ) {
2793                         $mode = 'conflict';
2794                 } elseif ( $this->preview ) {
2795                         $mode = 'preview';
2796                 } elseif ( $this->diff ) {
2797                         $mode = 'diff';
2798                 } else {
2799                         $mode = 'text';
2800                 }
2801                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2802
2803                 // Marker for detecting truncated form data.  This must be the last
2804                 // parameter sent in order to be of use, so do not move me.
2805                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2806                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2807
2808                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2809                         $this->displayPreviewArea( $previewOutput, false );
2810                 }
2811
2812         }
2813
2814         /**
2815          * Wrapper around TemplatesOnThisPageFormatter to make
2816          * a "templates on this page" list.
2817          *
2818          * @param Title[] $templates
2819          * @return string HTML
2820          */
2821         protected function makeTemplatesOnThisPageList( array $templates ) {
2822                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2823                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2824                 );
2825
2826                 // preview if preview, else section if section, else false
2827                 $type = false;
2828                 if ( $this->preview ) {
2829                         $type = 'preview';
2830                 } elseif ( $this->section != '' ) {
2831                         $type = 'section';
2832                 }
2833
2834                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2835                         $templateListFormatter->format( $templates, $type )
2836                 );
2837
2838         }
2839
2840         /**
2841          * Extract the section title from current section text, if any.
2842          *
2843          * @param string $text
2844          * @return string|bool String or false
2845          */
2846         public static function extractSectionTitle( $text ) {
2847                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2848                 if ( !empty( $matches[2] ) ) {
2849                         global $wgParser;
2850                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2851                 } else {
2852                         return false;
2853                 }
2854         }
2855
2856         /**
2857          * @return bool
2858          */
2859         protected function showHeader() {
2860                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2861                 global $wgAllowUserCss, $wgAllowUserJs;
2862
2863                 if ( $this->mTitle->isTalkPage() ) {
2864                         $wgOut->addWikiMsg( 'talkpagetext' );
2865                 }
2866
2867                 // Add edit notices
2868                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
2869                 if ( count( $editNotices ) ) {
2870                         $wgOut->addHTML( implode( "\n", $editNotices ) );
2871                 } else {
2872                         $msg = $this->context->msg( 'editnotice-notext' );
2873                         if ( !$msg->isDisabled() ) {
2874                                 $wgOut->addHTML(
2875                                         '<div class="mw-editnotice-notext">'
2876                                         . $msg->parseAsBlock()
2877                                         . '</div>'
2878                                 );
2879                         }
2880                 }
2881
2882                 if ( $this->isConflict ) {
2883                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2884                         $this->editRevId = $this->page->getLatest();
2885                 } else {
2886                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2887                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2888                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2889                                 // Someone is welcome to try refactoring though
2890                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2891                                 return false;
2892                         }
2893
2894                         if ( $this->section != '' && $this->section != 'new' ) {
2895                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2896                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2897                                         if ( $sectionTitle !== false ) {
2898                                                 $this->summary = "/* $sectionTitle */ ";
2899                                         }
2900                                 }
2901                         }
2902
2903                         if ( $this->missingComment ) {
2904                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2905                         }
2906
2907                         if ( $this->missingSummary && $this->section != 'new' ) {
2908                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2909                         }
2910
2911                         if ( $this->missingSummary && $this->section == 'new' ) {
2912                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2913                         }
2914
2915                         if ( $this->blankArticle ) {
2916                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2917                         }
2918
2919                         if ( $this->selfRedirect ) {
2920                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2921                         }
2922
2923                         if ( $this->hookError !== '' ) {
2924                                 $wgOut->addWikiText( $this->hookError );
2925                         }
2926
2927                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2928                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2929                         }
2930
2931                         if ( $this->section != 'new' ) {
2932                                 $revision = $this->mArticle->getRevisionFetched();
2933                                 if ( $revision ) {
2934                                         // Let sysop know that this will make private content public if saved
2935
2936                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2937                                                 $wgOut->wrapWikiMsg(
2938                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2939                                                         'rev-deleted-text-permission'
2940                                                 );
2941                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2942                                                 $wgOut->wrapWikiMsg(
2943                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2944                                                         'rev-deleted-text-view'
2945                                                 );
2946                                         }
2947
2948                                         if ( !$revision->isCurrent() ) {
2949                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2950                                                 $wgOut->addWikiMsg( 'editingold' );
2951                                         }
2952                                 } elseif ( $this->mTitle->exists() ) {
2953                                         // Something went wrong
2954
2955                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2956                                                 [ 'missing-revision', $this->oldid ] );
2957                                 }
2958                         }
2959                 }
2960
2961                 if ( wfReadOnly() ) {
2962                         $wgOut->wrapWikiMsg(
2963                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2964                                 [ 'readonlywarning', wfReadOnlyReason() ]
2965                         );
2966                 } elseif ( $wgUser->isAnon() ) {
2967                         if ( $this->formtype != 'preview' ) {
2968                                 $wgOut->wrapWikiMsg(
2969                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2970                                         [ 'anoneditwarning',
2971                                                 // Log-in link
2972                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2973                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2974                                                 ] ),
2975                                                 // Sign-up link
2976                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2977                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2978                                                 ] )
2979                                         ]
2980                                 );
2981                         } else {
2982                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
2983                                         'anonpreviewwarning'
2984                                 );
2985                         }
2986                 } else {
2987                         if ( $this->isCssJsSubpage ) {
2988                                 # Check the skin exists
2989                                 if ( $this->isWrongCaseCssJsPage ) {
2990                                         $wgOut->wrapWikiMsg(
2991                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2992                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
2993                                         );
2994                                 }
2995                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2996                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
2997                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
2998                                         );
2999                                         if ( $this->formtype !== 'preview' ) {
3000                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3001                                                         $wgOut->wrapWikiMsg(
3002                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3003                                                                 [ 'usercssyoucanpreview' ]
3004                                                         );
3005                                                 }
3006
3007                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3008                                                         $wgOut->wrapWikiMsg(
3009                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3010                                                                 [ 'userjsyoucanpreview' ]
3011                                                         );
3012                                                 }
3013                                         }
3014                                 }
3015                         }
3016                 }
3017
3018                 if ( $this->mTitle->isProtected( 'edit' ) &&
3019                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3020                 ) {
3021                         # Is the title semi-protected?
3022                         if ( $this->mTitle->isSemiProtected() ) {
3023                                 $noticeMsg = 'semiprotectedpagewarning';
3024                         } else {
3025                                 # Then it must be protected based on static groups (regular)
3026                                 $noticeMsg = 'protectedpagewarning';
3027                         }
3028                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
3029                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
3030                 }
3031                 if ( $this->mTitle->isCascadeProtected() ) {
3032                         # Is this page under cascading protection from some source pages?
3033                         /** @var Title[] $cascadeSources */
3034                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
3035                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
3036                         $cascadeSourcesCount = count( $cascadeSources );
3037                         if ( $cascadeSourcesCount > 0 ) {
3038                                 # Explain, and list the titles responsible
3039                                 foreach ( $cascadeSources as $page ) {
3040                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
3041                                 }
3042                         }
3043                         $notice .= '</div>';
3044                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
3045                 }
3046                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
3047                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
3048                                 [ 'lim' => 1,
3049                                         'showIfEmpty' => false,
3050                                         'msgKey' => [ 'titleprotectedwarning' ],
3051                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
3052                 }
3053
3054                 if ( $this->contentLength === false ) {
3055                         $this->contentLength = strlen( $this->textbox1 );
3056                 }
3057
3058                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
3059                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
3060                                 [
3061                                         'longpageerror',
3062                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
3063                                         $wgLang->formatNum( $wgMaxArticleSize )
3064                                 ]
3065                         );
3066                 } else {
3067                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
3068                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
3069                                         [
3070                                                 'longpage-hint',
3071                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
3072                                                 strlen( $this->textbox1 )
3073                                         ]
3074                                 );
3075                         }
3076                 }
3077                 # Add header copyright warning
3078                 $this->showHeaderCopyrightWarning();
3079
3080                 return true;
3081         }
3082
3083         /**
3084          * Standard summary input and label (wgSummary), abstracted so EditPage
3085          * subclasses may reorganize the form.
3086          * Note that you do not need to worry about the label's for=, it will be
3087          * inferred by the id given to the input. You can remove them both by
3088          * passing [ 'id' => false ] to $userInputAttrs.
3089          *
3090          * @param string $summary The value of the summary input
3091          * @param string $labelText The html to place inside the label
3092          * @param array $inputAttrs Array of attrs to use on the input
3093          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3094          *
3095          * @return array An array in the format [ $label, $input ]
3096          */
3097         function getSummaryInput( $summary = "", $labelText = null,
3098                 $inputAttrs = null, $spanLabelAttrs = null
3099         ) {
3100                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3101                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3102                         'id' => 'wpSummary',
3103                         'maxlength' => '200',
3104                         'tabindex' => '1',
3105                         'size' => 60,
3106                         'spellcheck' => 'true',
3107                 ] + Linker::tooltipAndAccesskeyAttribs( 'summary' );
3108
3109                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3110                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3111                         'id' => "wpSummaryLabel"
3112                 ];
3113
3114                 $label = null;
3115                 if ( $labelText ) {
3116                         $label = Xml::tags(
3117                                 'label',
3118                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3119                                 $labelText
3120                         );
3121                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3122                 }
3123
3124                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3125
3126                 return [ $label, $input ];
3127         }
3128
3129         /**
3130          * @param bool $isSubjectPreview True if this is the section subject/title
3131          *   up top, or false if this is the comment summary
3132          *   down below the textarea
3133          * @param string $summary The text of the summary to display
3134          */
3135         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3136                 global $wgOut;
3137                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3138                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3139                 if ( $isSubjectPreview ) {
3140                         if ( $this->nosummary ) {
3141                                 return;
3142                         }
3143                 } else {
3144                         if ( !$this->mShowSummaryField ) {
3145                                 return;
3146                         }
3147                 }
3148                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3149                 list( $label, $input ) = $this->getSummaryInput(
3150                         $summary,
3151                         $labelText,
3152                         [ 'class' => $summaryClass ],
3153                         []
3154                 );
3155                 $wgOut->addHTML( "{$label} {$input}" );
3156         }
3157
3158         /**
3159          * @param bool $isSubjectPreview True if this is the section subject/title
3160          *   up top, or false if this is the comment summary
3161          *   down below the textarea
3162          * @param string $summary The text of the summary to display
3163          * @return string
3164          */
3165         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3166                 // avoid spaces in preview, gets always trimmed on save
3167                 $summary = trim( $summary );
3168                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3169                         return "";
3170                 }
3171
3172                 global $wgParser;
3173
3174                 if ( $isSubjectPreview ) {
3175                         $summary = $this->context->msg( 'newsectionsummary' )
3176                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3177                                 ->inContentLanguage()->text();
3178                 }
3179
3180                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3181
3182                 $summary = $this->context->msg( $message )->parse()
3183                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3184                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3185         }
3186
3187         protected function showFormBeforeText() {
3188                 global $wgOut;
3189                 $section = htmlspecialchars( $this->section );
3190                 $wgOut->addHTML( <<<HTML
3191 <input type='hidden' value="{$section}" name="wpSection"/>
3192 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3193 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3194 <input type='hidden' value="{$this->editRevId}" name="editRevId" />
3195 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3196
3197 HTML
3198                 );
3199                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3200                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3201                 }
3202         }
3203
3204         protected function showFormAfterText() {
3205                 global $wgOut, $wgUser;
3206                 /**
3207                  * To make it harder for someone to slip a user a page
3208                  * which submits an edit form to the wiki without their
3209                  * knowledge, a random token is associated with the login
3210                  * session. If it's not passed back with the submission,
3211                  * we won't save the page, or render user JavaScript and
3212                  * CSS previews.
3213                  *
3214                  * For anon editors, who may not have a session, we just
3215                  * include the constant suffix to prevent editing from
3216                  * broken text-mangling proxies.
3217                  */
3218                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3219         }
3220
3221         /**
3222          * Subpage overridable method for printing the form for page content editing
3223          * By default this simply outputs wpTextbox1
3224          * Subclasses can override this to provide a custom UI for editing;
3225          * be it a form, or simply wpTextbox1 with a modified content that will be
3226          * reverse modified when extracted from the post data.
3227          * Note that this is basically the inverse for importContentFormData
3228          */
3229         protected function showContentForm() {
3230                 $this->showTextbox1();
3231         }
3232
3233         /**
3234          * Method to output wpTextbox1
3235          * The $textoverride method can be used by subclasses overriding showContentForm
3236          * to pass back to this method.
3237          *
3238          * @param array $customAttribs Array of html attributes to use in the textarea
3239          * @param string $textoverride Optional text to override $this->textarea1 with
3240          */
3241         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3242                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3243                         $attribs = [ 'style' => 'display:none;' ];
3244                 } else {
3245                         $classes = []; // Textarea CSS
3246                         if ( $this->mTitle->isProtected( 'edit' ) &&
3247                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3248                         ) {
3249                                 # Is the title semi-protected?
3250                                 if ( $this->mTitle->isSemiProtected() ) {
3251                                         $classes[] = 'mw-textarea-sprotected';
3252                                 } else {
3253                                         # Then it must be protected based on static groups (regular)
3254                                         $classes[] = 'mw-textarea-protected';
3255                                 }
3256                                 # Is the title cascade-protected?
3257                                 if ( $this->mTitle->isCascadeProtected() ) {
3258                                         $classes[] = 'mw-textarea-cprotected';
3259                                 }
3260                         }
3261
3262                         $attribs = [ 'tabindex' => 1 ];
3263
3264                         if ( is_array( $customAttribs ) ) {
3265                                 $attribs += $customAttribs;
3266                         }
3267
3268                         if ( count( $classes ) ) {
3269                                 if ( isset( $attribs['class'] ) ) {
3270                                         $classes[] = $attribs['class'];
3271                                 }
3272                                 $attribs['class'] = implode( ' ', $classes );
3273                         }
3274                 }
3275
3276                 $this->showTextbox(
3277                         $textoverride !== null ? $textoverride : $this->textbox1,
3278                         'wpTextbox1',
3279                         $attribs
3280                 );
3281         }
3282
3283         protected function showTextbox2() {
3284                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3285         }
3286
3287         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3288                 global $wgOut, $wgUser;
3289
3290                 $wikitext = $this->safeUnicodeOutput( $text );
3291                 if ( strval( $wikitext ) !== '' ) {
3292                         // Ensure there's a newline at the end, otherwise adding lines
3293                         // is awkward.
3294                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3295                         // mode will show an extra newline. A bit annoying.
3296                         $wikitext .= "\n";
3297                 }
3298
3299                 $attribs = $customAttribs + [
3300                         'accesskey' => ',',
3301                         'id' => $name,
3302                         'cols' => $wgUser->getIntOption( 'cols' ),
3303                         'rows' => $wgUser->getIntOption( 'rows' ),
3304                         // The following classes can be used here:
3305                         // * mw-editfont-default
3306                         // * mw-editfont-monospace
3307                         // * mw-editfont-sans-serif
3308                         // * mw-editfont-serif
3309                         'class' => 'mw-editfont-' . $wgUser->getOption( 'editfont' ),
3310                         // Avoid PHP notices when appending preferences
3311                         // (appending allows customAttribs['style'] to still work).
3312                         'style' => ''
3313                 ];
3314
3315                 $pageLang = $this->mTitle->getPageLanguage();
3316                 $attribs['lang'] = $pageLang->getHtmlCode();
3317                 $attribs['dir'] = $pageLang->getDir();
3318
3319                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3320         }
3321
3322         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3323                 global $wgOut;
3324                 $classes = [];
3325                 if ( $isOnTop ) {
3326                         $classes[] = 'ontop';
3327                 }
3328
3329                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3330
3331                 if ( $this->formtype != 'preview' ) {
3332                         $attribs['style'] = 'display: none;';
3333                 }
3334
3335                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3336
3337                 if ( $this->formtype == 'preview' ) {
3338                         $this->showPreview( $previewOutput );
3339                 } else {
3340                         // Empty content container for LivePreview
3341                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3342                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3343                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3344                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3345                 }
3346
3347                 $wgOut->addHTML( '</div>' );
3348
3349                 if ( $this->formtype == 'diff' ) {
3350                         try {
3351                                 $this->showDiff();
3352                         } catch ( MWContentSerializationException $ex ) {
3353                                 $msg = $this->context->msg(
3354                                         'content-failed-to-parse',
3355                                         $this->contentModel,
3356                                         $this->contentFormat,
3357                                         $ex->getMessage()
3358                                 );
3359                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3360                         }
3361                 }
3362         }
3363
3364         /**
3365          * Append preview output to $wgOut.
3366          * Includes category rendering if this is a category page.
3367          *
3368          * @param string $text The HTML to be output for the preview.
3369          */
3370         protected function showPreview( $text ) {
3371                 global $wgOut;
3372                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3373                         $this->mArticle->openShowCategory();
3374                 }
3375                 # This hook seems slightly odd here, but makes things more
3376                 # consistent for extensions.
3377                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3378                 $wgOut->addHTML( $text );
3379                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3380                         $this->mArticle->closeShowCategory();
3381                 }
3382         }
3383
3384         /**
3385          * Get a diff between the current contents of the edit box and the
3386          * version of the page we're editing from.
3387          *
3388          * If this is a section edit, we'll replace the section as for final
3389          * save and then make a comparison.
3390          */
3391         function showDiff() {
3392                 global $wgUser, $wgContLang, $wgOut;
3393
3394                 $oldtitlemsg = 'currentrev';
3395                 # if message does not exist, show diff against the preloaded default
3396                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3397                         $oldtext = $this->mTitle->getDefaultMessageText();
3398                         if ( $oldtext !== false ) {
3399                                 $oldtitlemsg = 'defaultmessagetext';
3400                                 $oldContent = $this->toEditContent( $oldtext );
3401                         } else {
3402                                 $oldContent = null;
3403                         }
3404                 } else {
3405                         $oldContent = $this->getCurrentContent();
3406                 }
3407
3408                 $textboxContent = $this->toEditContent( $this->textbox1 );
3409                 if ( $this->editRevId !== null ) {
3410                         $newContent = $this->page->replaceSectionAtRev(
3411                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3412                         );
3413                 } else {
3414                         $newContent = $this->page->replaceSectionContent(
3415                                 $this->section, $textboxContent, $this->summary, $this->edittime
3416                         );
3417                 }
3418
3419                 if ( $newContent ) {
3420                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', [ $this, &$newContent ], '1.21' );
3421                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3422
3423                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3424                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3425                 }
3426
3427                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3428                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3429                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3430
3431                         if ( !$oldContent ) {
3432                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3433                         }
3434
3435                         if ( !$newContent ) {
3436                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3437                         }
3438
3439                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3440                         $de->setContent( $oldContent, $newContent );
3441
3442                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3443                         $de->showDiffStyle();
3444                 } else {
3445                         $difftext = '';
3446                 }
3447
3448                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3449         }
3450
3451         /**
3452          * Show the header copyright warning.
3453          */
3454         protected function showHeaderCopyrightWarning() {
3455                 $msg = 'editpage-head-copy-warn';
3456                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3457                         global $wgOut;
3458                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3459                                 'editpage-head-copy-warn' );
3460                 }
3461         }
3462
3463         /**
3464          * Give a chance for site and per-namespace customizations of
3465          * terms of service summary link that might exist separately
3466          * from the copyright notice.
3467          *
3468          * This will display between the save button and the edit tools,
3469          * so should remain short!
3470          */
3471         protected function showTosSummary() {
3472                 $msg = 'editpage-tos-summary';
3473                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3474                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3475                         global $wgOut;
3476                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3477                         $wgOut->addWikiMsg( $msg );
3478                         $wgOut->addHTML( '</div>' );
3479                 }
3480         }
3481
3482         protected function showEditTools() {
3483                 global $wgOut;
3484                 $wgOut->addHTML( '<div class="mw-editTools">' .
3485                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3486                         '</div>' );
3487         }
3488
3489         /**
3490          * Get the copyright warning
3491          *
3492          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3493          * @return string
3494          */
3495         protected function getCopywarn() {
3496                 return self::getCopyrightWarning( $this->mTitle );
3497         }
3498
3499         /**
3500          * Get the copyright warning, by default returns wikitext
3501          *
3502          * @param Title $title
3503          * @param string $format Output format, valid values are any function of a Message object
3504          * @return string
3505          */
3506         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3507                 global $wgRightsText;
3508                 if ( $wgRightsText ) {
3509                         $copywarnMsg = [ 'copyrightwarning',
3510                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3511                                 $wgRightsText ];
3512                 } else {
3513                         $copywarnMsg = [ 'copyrightwarning2',
3514                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3515                 }
3516                 // Allow for site and per-namespace customization of contribution/copyright notice.
3517                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3518
3519                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3520                 if ( $langcode ) {
3521                         $msg->inLanguage( $langcode );
3522                 }
3523                 return "<div id=\"editpage-copywarn\">\n" .
3524                         $msg->$format() . "\n</div>";
3525         }
3526
3527         /**
3528          * Get the Limit report for page previews
3529          *
3530          * @since 1.22
3531          * @param ParserOutput $output ParserOutput object from the parse
3532          * @return string HTML
3533          */
3534         public static function getPreviewLimitReport( $output ) {
3535                 if ( !$output || !$output->getLimitReportData() ) {
3536                         return '';
3537                 }
3538
3539                 return ResourceLoader::makeInlineScript(
3540                         ResourceLoader::makeConfigSetScript(
3541                                 [ 'wgPageParseReport' => $output->getLimitReportData() ],
3542                                 true
3543                         )
3544                 );
3545         }
3546
3547         protected function showStandardInputs( &$tabindex = 2 ) {
3548                 global $wgOut;
3549                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3550
3551                 if ( $this->section != 'new' ) {
3552                         $this->showSummaryInput( false, $this->summary );
3553                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3554                 }
3555
3556                 $checkboxes = $this->getCheckboxes( $tabindex,
3557                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ] );
3558                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3559
3560                 // Show copyright warning.
3561                 $wgOut->addWikiText( $this->getCopywarn() );
3562                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3563
3564                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3565                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3566
3567                 $cancel = $this->getCancelLink();
3568                 if ( $cancel !== '' ) {
3569                         $cancel .= Html::element( 'span',
3570                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3571                                 $this->context->msg( 'pipe-separator' )->text() );
3572                 }
3573
3574                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3575                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3576                 $attrs = [
3577                         'target' => 'helpwindow',
3578                         'href' => $edithelpurl,
3579                 ];
3580                 $edithelp = Html::linkButton( $this->context->msg( 'edithelp' )->text(),
3581                         $attrs, [ 'mw-ui-quiet' ] ) .
3582                         $this->context->msg( 'word-separator' )->escaped() .
3583                         $this->context->msg( 'newwindow' )->parse();
3584
3585                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3586                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3587                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3588
3589                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3590
3591                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3592         }
3593
3594         /**
3595          * Show an edit conflict. textbox1 is already shown in showEditForm().
3596          * If you want to use another entry point to this function, be careful.
3597          */
3598         protected function showConflict() {
3599                 global $wgOut;
3600
3601                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$this, &$wgOut ] ) ) {
3602                         $stats = $wgOut->getContext()->getStats();
3603                         $stats->increment( 'edit.failures.conflict' );
3604                         // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3605                         if (
3606                                 $this->mTitle->getNamespace() >= NS_MAIN &&
3607                                 $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3608                         ) {
3609                                 $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3610                         }
3611
3612                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3613
3614                         $content1 = $this->toEditContent( $this->textbox1 );
3615                         $content2 = $this->toEditContent( $this->textbox2 );
3616
3617                         $handler = ContentHandler::getForModelID( $this->contentModel );
3618                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3619                         $de->setContent( $content2, $content1 );
3620                         $de->showDiff(
3621                                 $this->context->msg( 'yourtext' )->parse(),
3622                                 $this->context->msg( 'storedversion' )->text()
3623                         );
3624
3625                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3626                         $this->showTextbox2();
3627                 }
3628         }
3629
3630         /**
3631          * @return string
3632          */
3633         public function getCancelLink() {
3634                 $cancelParams = [];
3635                 if ( !$this->isConflict && $this->oldid > 0 ) {
3636                         $cancelParams['oldid'] = $this->oldid;
3637                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3638                         $cancelParams['redirect'] = 'no';
3639                 }
3640                 $attrs = [ 'id' => 'mw-editform-cancel' ];
3641
3642                 return Linker::linkKnown(
3643                         $this->getContextTitle(),
3644                         $this->context->msg( 'cancel' )->parse(),
3645                         Html::buttonAttributes( $attrs, [ 'mw-ui-quiet' ] ),
3646                         $cancelParams
3647                 );
3648         }
3649
3650         /**
3651          * Returns the URL to use in the form's action attribute.
3652          * This is used by EditPage subclasses when simply customizing the action
3653          * variable in the constructor is not enough. This can be used when the
3654          * EditPage lives inside of a Special page rather than a custom page action.
3655          *
3656          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3657          * @return string
3658          */
3659         protected function getActionURL( Title $title ) {
3660                 return $title->getLocalURL( [ 'action' => $this->action ] );
3661         }
3662
3663         /**
3664          * Check if a page was deleted while the user was editing it, before submit.
3665          * Note that we rely on the logging table, which hasn't been always there,
3666          * but that doesn't matter, because this only applies to brand new
3667          * deletes.
3668          * @return bool
3669          */
3670         protected function wasDeletedSinceLastEdit() {
3671                 if ( $this->deletedSinceEdit !== null ) {
3672                         return $this->deletedSinceEdit;
3673                 }
3674
3675                 $this->deletedSinceEdit = false;
3676
3677                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3678                         $this->lastDelete = $this->getLastDelete();
3679                         if ( $this->lastDelete ) {
3680                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3681                                 if ( $deleteTime > $this->starttime ) {
3682                                         $this->deletedSinceEdit = true;
3683                                 }
3684                         }
3685                 }
3686
3687                 return $this->deletedSinceEdit;
3688         }
3689
3690         /**
3691          * @return bool|stdClass
3692          */
3693         protected function getLastDelete() {
3694                 $dbr = wfGetDB( DB_REPLICA );
3695                 $data = $dbr->selectRow(
3696                         [ 'logging', 'user' ],
3697                         [
3698                                 'log_type',
3699                                 'log_action',
3700                                 'log_timestamp',
3701                                 'log_user',
3702                                 'log_namespace',
3703                                 'log_title',
3704                                 'log_comment',
3705                                 'log_params',
3706                                 'log_deleted',
3707                                 'user_name'
3708                         ], [
3709                                 'log_namespace' => $this->mTitle->getNamespace(),
3710                                 'log_title' => $this->mTitle->getDBkey(),
3711                                 'log_type' => 'delete',
3712                                 'log_action' => 'delete',
3713                                 'user_id=log_user'
3714                         ],
3715                         __METHOD__,
3716                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ]
3717                 );
3718                 // Quick paranoid permission checks...
3719                 if ( is_object( $data ) ) {
3720                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3721                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3722                         }
3723
3724                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3725                                 $data->log_comment = $this->context->msg( 'rev-deleted-comment' )->escaped();
3726                         }
3727                 }
3728
3729                 return $data;
3730         }
3731
3732         /**
3733          * Get the rendered text for previewing.
3734          * @throws MWException
3735          * @return string
3736          */
3737         function getPreviewText() {
3738                 global $wgOut, $wgRawHtml, $wgLang;
3739                 global $wgAllowUserCss, $wgAllowUserJs;
3740
3741                 $stats = $wgOut->getContext()->getStats();
3742
3743                 if ( $wgRawHtml && !$this->mTokenOk ) {
3744                         // Could be an offsite preview attempt. This is very unsafe if
3745                         // HTML is enabled, as it could be an attack.
3746                         $parsedNote = '';
3747                         if ( $this->textbox1 !== '' ) {
3748                                 // Do not put big scary notice, if previewing the empty
3749                                 // string, which happens when you initially edit
3750                                 // a category page, due to automatic preview-on-open.
3751                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3752                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3753                                         true, /* interface */true );
3754                         }
3755                         $stats->increment( 'edit.failures.session_loss' );
3756                         return $parsedNote;
3757                 }
3758
3759                 $note = '';
3760
3761                 try {
3762                         $content = $this->toEditContent( $this->textbox1 );
3763
3764                         $previewHTML = '';
3765                         if ( !Hooks::run(
3766                                 'AlternateEditPreview',
3767                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3768                         ) {
3769                                 return $previewHTML;
3770                         }
3771
3772                         # provide a anchor link to the editform
3773                         $continueEditing = '<span class="mw-continue-editing">' .
3774                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3775                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3776                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3777                                 if ( $this->mTokenOkExceptSuffix ) {
3778                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3779                                         $stats->increment( 'edit.failures.bad_token' );
3780                                 } else {
3781                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3782                                         $stats->increment( 'edit.failures.session_loss' );
3783                                 }
3784                         } elseif ( $this->incompleteForm ) {
3785                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3786                                 if ( $this->mTriedSave ) {
3787                                         $stats->increment( 'edit.failures.incomplete_form' );
3788                                 }
3789                         } else {
3790                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3791                         }
3792
3793                         # don't parse non-wikitext pages, show message about preview
3794                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3795                                 if ( $this->mTitle->isCssJsSubpage() ) {
3796                                         $level = 'user';
3797                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3798                                         $level = 'site';
3799                                 } else {
3800                                         $level = false;
3801                                 }
3802
3803                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3804                                         $format = 'css';
3805                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3806                                                 $format = false;
3807                                         }
3808                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3809                                         $format = 'js';
3810                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3811                                                 $format = false;
3812                                         }
3813                                 } else {
3814                                         $format = false;
3815                                 }
3816
3817                                 # Used messages to make sure grep find them:
3818                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3819                                 if ( $level && $format ) {
3820                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3821                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3822                                                 ' ' . $continueEditing . "</div>";
3823                                 }
3824                         }
3825
3826                         # If we're adding a comment, we need to show the
3827                         # summary as the headline
3828                         if ( $this->section === "new" && $this->summary !== "" ) {
3829                                 $content = $content->addSectionHeader( $this->summary );
3830                         }
3831
3832                         $hook_args = [ $this, &$content ];
3833                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args, '1.25' );
3834                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3835
3836                         $parserResult = $this->doPreviewParse( $content );
3837                         $parserOutput = $parserResult['parserOutput'];
3838                         $previewHTML = $parserResult['html'];
3839                         $this->mParserOutput = $parserOutput;
3840                         $wgOut->addParserOutputMetadata( $parserOutput );
3841
3842                         if ( count( $parserOutput->getWarnings() ) ) {
3843                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3844                         }
3845
3846                 } catch ( MWContentSerializationException $ex ) {
3847                         $m = $this->context->msg(
3848                                 'content-failed-to-parse',
3849                                 $this->contentModel,
3850                                 $this->contentFormat,
3851                                 $ex->getMessage()
3852                         );
3853                         $note .= "\n\n" . $m->parse();
3854                         $previewHTML = '';
3855                 }
3856
3857                 if ( $this->isConflict ) {
3858                         $conflict = '<h2 id="mw-previewconflict">'
3859                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3860                 } else {
3861                         $conflict = '<hr />';
3862                 }
3863
3864                 $previewhead = "<div class='previewnote'>\n" .
3865                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3866                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3867
3868                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3869                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3870                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3871                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3872
3873                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3874         }
3875
3876         /**
3877          * Get parser options for a preview
3878          * @return ParserOptions
3879          */
3880         protected function getPreviewParserOptions() {
3881                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3882                 $parserOptions->setIsPreview( true );
3883                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3884                 $parserOptions->enableLimitReport();
3885                 return $parserOptions;
3886         }
3887
3888         /**
3889          * Parse the page for a preview. Subclasses may override this class, in order
3890          * to parse with different options, or to otherwise modify the preview HTML.
3891          *
3892          * @param Content $content The page content
3893          * @return array with keys:
3894          *   - parserOutput: The ParserOutput object
3895          *   - html: The HTML to be displayed
3896          */
3897         protected function doPreviewParse( Content $content ) {
3898                 global $wgUser;
3899                 $parserOptions = $this->getPreviewParserOptions();
3900                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3901                 $scopedCallback = $parserOptions->setupFakeRevision(
3902                         $this->mTitle, $pstContent, $wgUser );
3903                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3904                 ScopedCallback::consume( $scopedCallback );
3905                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3906                 return [
3907                         'parserOutput' => $parserOutput,
3908                         'html' => $parserOutput->getText() ];
3909         }
3910
3911         /**
3912          * @return array
3913          */
3914         function getTemplates() {
3915                 if ( $this->preview || $this->section != '' ) {
3916                         $templates = [];
3917                         if ( !isset( $this->mParserOutput ) ) {
3918                                 return $templates;
3919                         }
3920                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3921                                 foreach ( array_keys( $template ) as $dbk ) {
3922                                         $templates[] = Title::makeTitle( $ns, $dbk );
3923                                 }
3924                         }
3925                         return $templates;
3926                 } else {
3927                         return $this->mTitle->getTemplateLinksFrom();
3928                 }
3929         }
3930
3931         /**
3932          * Shows a bulletin board style toolbar for common editing functions.
3933          * It can be disabled in the user preferences.
3934          *
3935          * @param Title $title Title object for the page being edited (optional)
3936          * @return string
3937          */
3938         static function getEditToolbar( $title = null ) {
3939                 global $wgContLang, $wgOut;
3940                 global $wgEnableUploads, $wgForeignFileRepos;
3941
3942                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3943                 $showSignature = true;
3944                 if ( $title ) {
3945                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3946                 }
3947
3948                 /**
3949                  * $toolarray is an array of arrays each of which includes the
3950                  * opening tag, the closing tag, optionally a sample text that is
3951                  * inserted between the two when no selection is highlighted
3952                  * and.  The tip text is shown when the user moves the mouse
3953                  * over the button.
3954                  *
3955                  * Images are defined in ResourceLoaderEditToolbarModule.
3956                  */
3957                 $toolarray = [
3958                         [
3959                                 'id'     => 'mw-editbutton-bold',
3960                                 'open'   => '\'\'\'',
3961                                 'close'  => '\'\'\'',
3962                                 'sample' => wfMessage( 'bold_sample' )->text(),
3963                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3964                         ],
3965                         [
3966                                 'id'     => 'mw-editbutton-italic',
3967                                 'open'   => '\'\'',
3968                                 'close'  => '\'\'',
3969                                 'sample' => wfMessage( 'italic_sample' )->text(),
3970                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3971                         ],
3972                         [
3973                                 'id'     => 'mw-editbutton-link',
3974                                 'open'   => '[[',
3975                                 'close'  => ']]',
3976                                 'sample' => wfMessage( 'link_sample' )->text(),
3977                                 'tip'    => wfMessage( 'link_tip' )->text(),
3978                         ],
3979                         [
3980                                 'id'     => 'mw-editbutton-extlink',
3981                                 'open'   => '[',
3982                                 'close'  => ']',
3983                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3984                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3985                         ],
3986                         [
3987                                 'id'     => 'mw-editbutton-headline',
3988                                 'open'   => "\n== ",
3989                                 'close'  => " ==\n",
3990                                 'sample' => wfMessage( 'headline_sample' )->text(),
3991                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3992                         ],
3993                         $imagesAvailable ? [
3994                                 'id'     => 'mw-editbutton-image',
3995                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3996                                 'close'  => ']]',
3997                                 'sample' => wfMessage( 'image_sample' )->text(),
3998                                 'tip'    => wfMessage( 'image_tip' )->text(),
3999                         ] : false,
4000                         $imagesAvailable ? [
4001                                 'id'     => 'mw-editbutton-media',
4002                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4003                                 'close'  => ']]',
4004                                 'sample' => wfMessage( 'media_sample' )->text(),
4005                                 'tip'    => wfMessage( 'media_tip' )->text(),
4006                         ] : false,
4007                         [
4008                                 'id'     => 'mw-editbutton-nowiki',
4009                                 'open'   => "<nowiki>",
4010                                 'close'  => "</nowiki>",
4011                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4012                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4013                         ],
4014                         $showSignature ? [
4015                                 'id'     => 'mw-editbutton-signature',
4016                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4017                                 'close'  => '',
4018                                 'sample' => '',
4019                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4020                         ] : false,
4021                         [
4022                                 'id'     => 'mw-editbutton-hr',
4023                                 'open'   => "\n----\n",
4024                                 'close'  => '',
4025                                 'sample' => '',
4026                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4027                         ]
4028                 ];
4029
4030                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4031                 foreach ( $toolarray as $tool ) {
4032                         if ( !$tool ) {
4033                                 continue;
4034                         }
4035
4036                         $params = [
4037                                 // Images are defined in ResourceLoaderEditToolbarModule
4038                                 false,
4039                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4040                                 // Older browsers show a "speedtip" type message only for ALT.
4041                                 // Ideally these should be different, realistically they
4042                                 // probably don't need to be.
4043                                 $tool['tip'],
4044                                 $tool['open'],
4045                                 $tool['close'],
4046                                 $tool['sample'],
4047                                 $tool['id'],
4048                         ];
4049
4050                         $script .= Xml::encodeJsCall(
4051                                 'mw.toolbar.addButton',
4052                                 $params,
4053                                 ResourceLoader::inDebugMode()
4054                         );
4055                 }
4056
4057                 $script .= '});';
4058                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4059
4060                 $toolbar = '<div id="toolbar"></div>';
4061
4062                 Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] );
4063
4064                 return $toolbar;
4065         }
4066
4067         /**
4068          * Returns an array of html code of the following checkboxes:
4069          * minor and watch
4070          *
4071          * @param int $tabindex Current tabindex
4072          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4073          *                 status of the checkbox
4074          *
4075          * @return array
4076          */
4077         public function getCheckboxes( &$tabindex, $checked ) {
4078                 global $wgUser, $wgUseMediaWikiUIEverywhere;
4079
4080                 $checkboxes = [];
4081
4082                 // don't show the minor edit checkbox if it's a new page or section
4083                 if ( !$this->isNew ) {
4084                         $checkboxes['minor'] = '';
4085                         $minorLabel = $this->context->msg( 'minoredit' )->parse();
4086                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
4087                                 $attribs = [
4088                                         'tabindex' => ++$tabindex,
4089                                         'accesskey' => $this->context->msg( 'accesskey-minoredit' )->text(),
4090                                         'id' => 'wpMinoredit',
4091                                 ];
4092                                 $minorEditHtml =
4093                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
4094                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
4095                                         Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ] ) .
4096                                         ">{$minorLabel}</label>";
4097
4098                                 if ( $wgUseMediaWikiUIEverywhere ) {
4099                                         $checkboxes['minor'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4100                                                 $minorEditHtml .
4101                                         Html::closeElement( 'div' );
4102                                 } else {
4103                                         $checkboxes['minor'] = $minorEditHtml;
4104                                 }
4105                         }
4106                 }
4107
4108                 $watchLabel = $this->context->msg( 'watchthis' )->parse();
4109                 $checkboxes['watch'] = '';
4110                 if ( $wgUser->isLoggedIn() ) {
4111                         $attribs = [
4112                                 'tabindex' => ++$tabindex,
4113                                 'accesskey' => $this->context->msg( 'accesskey-watch' )->text(),
4114                                 'id' => 'wpWatchthis',
4115                         ];
4116                         $watchThisHtml =
4117                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
4118                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
4119                                 Xml::expandAttributes( [ 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ] ) .
4120                                 ">{$watchLabel}</label>";
4121                         if ( $wgUseMediaWikiUIEverywhere ) {
4122                                 $checkboxes['watch'] = Html::openElement( 'div', [ 'class' => 'mw-ui-checkbox' ] ) .
4123                                         $watchThisHtml .
4124                                         Html::closeElement( 'div' );
4125                         } else {
4126                                 $checkboxes['watch'] = $watchThisHtml;
4127                         }
4128                 }
4129                 Hooks::run( 'EditPageBeforeEditChecks', [ &$this, &$checkboxes, &$tabindex ] );
4130                 return $checkboxes;
4131         }
4132
4133         /**
4134          * Returns an array of html code of the following buttons:
4135          * save, diff, preview and live
4136          *
4137          * @param int $tabindex Current tabindex
4138          *
4139          * @return array
4140          */
4141         public function getEditButtons( &$tabindex ) {
4142                 $buttons = [];
4143
4144                 $labelAsPublish =
4145                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4146
4147                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4148                 if ( $labelAsPublish ) {
4149                         $buttonLabelKey = !$this->mTitle->exists() ? 'publishpage' : 'publishchanges';
4150                 } else {
4151                         $buttonLabelKey = !$this->mTitle->exists() ? 'savearticle' : 'savechanges';
4152                 }
4153                 $buttonLabel = $this->context->msg( $buttonLabelKey )->text();
4154                 $attribs = [
4155                         'id' => 'wpSave',
4156                         'name' => 'wpSave',
4157                         'tabindex' => ++$tabindex,
4158                 ] + Linker::tooltipAndAccesskeyAttribs( 'save' );
4159                 $buttons['save'] = Html::submitButton( $buttonLabel, $attribs, [ 'mw-ui-progressive' ] );
4160
4161                 ++$tabindex; // use the same for preview and live preview
4162                 $attribs = [
4163                         'id' => 'wpPreview',
4164                         'name' => 'wpPreview',
4165                         'tabindex' => $tabindex,
4166                 ] + Linker::tooltipAndAccesskeyAttribs( 'preview' );
4167                 $buttons['preview'] = Html::submitButton( $this->context->msg( 'showpreview' )->text(),
4168                         $attribs );
4169                 $buttons['live'] = '';
4170
4171                 $attribs = [
4172                         'id' => 'wpDiff',
4173                         'name' => 'wpDiff',
4174                         'tabindex' => ++$tabindex,
4175                 ] + Linker::tooltipAndAccesskeyAttribs( 'diff' );
4176                 $buttons['diff'] = Html::submitButton( $this->context->msg( 'showdiff' )->text(),
4177                         $attribs );
4178
4179                 Hooks::run( 'EditPageBeforeEditButtons', [ &$this, &$buttons, &$tabindex ] );
4180                 return $buttons;
4181         }
4182
4183         /**
4184          * Creates a basic error page which informs the user that
4185          * they have attempted to edit a nonexistent section.
4186          */
4187         function noSuchSectionPage() {
4188                 global $wgOut;
4189
4190                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4191
4192                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4193                 Hooks::run( 'EditPageNoSuchSection', [ &$this, &$res ] );
4194                 $wgOut->addHTML( $res );
4195
4196                 $wgOut->returnToMain( false, $this->mTitle );
4197         }
4198
4199         /**
4200          * Show "your edit contains spam" page with your diff and text
4201          *
4202          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4203          */
4204         public function spamPageWithContent( $match = false ) {
4205                 global $wgOut, $wgLang;
4206                 $this->textbox2 = $this->textbox1;
4207
4208                 if ( is_array( $match ) ) {
4209                         $match = $wgLang->listToText( $match );
4210                 }
4211                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4212
4213                 $wgOut->addHTML( '<div id="spamprotected">' );
4214                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4215                 if ( $match ) {
4216                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4217                 }
4218                 $wgOut->addHTML( '</div>' );
4219
4220                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4221                 $this->showDiff();
4222
4223                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4224                 $this->showTextbox2();
4225
4226                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4227         }
4228
4229         /**
4230          * Check if the browser is on a blacklist of user-agents known to
4231          * mangle UTF-8 data on form submission. Returns true if Unicode
4232          * should make it through, false if it's known to be a problem.
4233          * @return bool
4234          */
4235         private function checkUnicodeCompliantBrowser() {
4236                 global $wgBrowserBlackList, $wgRequest;
4237
4238                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4239                 if ( $currentbrowser === false ) {
4240                         // No User-Agent header sent? Trust it by default...
4241                         return true;
4242                 }
4243
4244                 foreach ( $wgBrowserBlackList as $browser ) {
4245                         if ( preg_match( $browser, $currentbrowser ) ) {
4246                                 return false;
4247                         }
4248                 }
4249                 return true;
4250         }
4251
4252         /**
4253          * Filter an input field through a Unicode de-armoring process if it
4254          * came from an old browser with known broken Unicode editing issues.
4255          *
4256          * @param WebRequest $request
4257          * @param string $field
4258          * @return string
4259          */
4260         protected function safeUnicodeInput( $request, $field ) {
4261                 $text = rtrim( $request->getText( $field ) );
4262                 return $request->getBool( 'safemode' )
4263                         ? $this->unmakeSafe( $text )
4264                         : $text;
4265         }
4266
4267         /**
4268          * Filter an output field through a Unicode armoring process if it is
4269          * going to an old browser with known broken Unicode editing issues.
4270          *
4271          * @param string $text
4272          * @return string
4273          */
4274         protected function safeUnicodeOutput( $text ) {
4275                 return $this->checkUnicodeCompliantBrowser()
4276                         ? $text
4277                         : $this->makeSafe( $text );
4278         }
4279
4280         /**
4281          * A number of web browsers are known to corrupt non-ASCII characters
4282          * in a UTF-8 text editing environment. To protect against this,
4283          * detected browsers will be served an armored version of the text,
4284          * with non-ASCII chars converted to numeric HTML character references.
4285          *
4286          * Preexisting such character references will have a 0 added to them
4287          * to ensure that round-trips do not alter the original data.
4288          *
4289          * @param string $invalue
4290          * @return string
4291          */
4292         private function makeSafe( $invalue ) {
4293                 // Armor existing references for reversibility.
4294                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4295
4296                 $bytesleft = 0;
4297                 $result = "";
4298                 $working = 0;
4299                 $valueLength = strlen( $invalue );
4300                 for ( $i = 0; $i < $valueLength; $i++ ) {
4301                         $bytevalue = ord( $invalue[$i] );
4302                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4303                                 $result .= chr( $bytevalue );
4304                                 $bytesleft = 0;
4305                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4306                                 $working = $working << 6;
4307                                 $working += ( $bytevalue & 0x3F );
4308                                 $bytesleft--;
4309                                 if ( $bytesleft <= 0 ) {
4310                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4311                                 }
4312                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4313                                 $working = $bytevalue & 0x1F;
4314                                 $bytesleft = 1;
4315                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4316                                 $working = $bytevalue & 0x0F;
4317                                 $bytesleft = 2;
4318                         } else { // 1111 0xxx
4319                                 $working = $bytevalue & 0x07;
4320                                 $bytesleft = 3;
4321                         }
4322                 }
4323                 return $result;
4324         }
4325
4326         /**
4327          * Reverse the previously applied transliteration of non-ASCII characters
4328          * back to UTF-8. Used to protect data from corruption by broken web browsers
4329          * as listed in $wgBrowserBlackList.
4330          *
4331          * @param string $invalue
4332          * @return string
4333          */
4334         private function unmakeSafe( $invalue ) {
4335                 $result = "";
4336                 $valueLength = strlen( $invalue );
4337                 for ( $i = 0; $i < $valueLength; $i++ ) {
4338                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4339                                 $i += 3;
4340                                 $hexstring = "";
4341                                 do {
4342                                         $hexstring .= $invalue[$i];
4343                                         $i++;
4344                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4345
4346                                 // Do some sanity checks. These aren't needed for reversibility,
4347                                 // but should help keep the breakage down if the editor
4348                                 // breaks one of the entities whilst editing.
4349                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4350                                         $codepoint = hexdec( $hexstring );
4351                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4352                                 } else {
4353                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4354                                 }
4355                         } else {
4356                                 $result .= substr( $invalue, $i, 1 );
4357                         }
4358                 }
4359                 // reverse the transform that we made for reversibility reasons.
4360                 return strtr( $result, [ "&#x0" => "&#x" ] );
4361         }
4362 }