includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 use MediaWiki\Logger\LoggerFactory;
  24 use MediaWiki\MediaWikiServices;
  25 use Wikimedia\ScopedCallback;
  26
  27 /**
  28  * The edit page/HTML interface (split from Article)
  29  * The actual database and text munging is still in Article,
  30  * but it should get easier to call those from alternate
  31  * interfaces.
  32  *
  33  * EditPage cares about two distinct titles:
  34  * $this->mContextTitle is the page that forms submit to, links point to,
  35  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  36  * page in the database that is actually being edited. These are
  37  * usually the same, but they are now allowed to be different.
  38  *
  39  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  40  * headaches, which may be fatal.
  41  */
  42 class EditPage {
  43         /**
  44          * Status: Article successfully updated
  45          */
  46         const AS_SUCCESS_UPDATE = 200;
  47
  48         /**
  49          * Status: Article successfully created
  50          */
  51         const AS_SUCCESS_NEW_ARTICLE = 201;
  52
  53         /**
  54          * Status: Article update aborted by a hook function
  55          */
  56         const AS_HOOK_ERROR = 210;
  57
  58         /**
  59          * Status: A hook function returned an error
  60          */
  61         const AS_HOOK_ERROR_EXPECTED = 212;
  62
  63         /**
  64          * Status: User is blocked from editing this page
  65          */
  66         const AS_BLOCKED_PAGE_FOR_USER = 215;
  67
  68         /**
  69          * Status: Content too big (> $wgMaxArticleSize)
  70          */
  71         const AS_CONTENT_TOO_BIG = 216;
  72
  73         /**
  74          * Status: this anonymous user is not allowed to edit this page
  75          */
  76         const AS_READ_ONLY_PAGE_ANON = 218;
  77
  78         /**
  79          * Status: this logged in user is not allowed to edit this page
  80          */
  81         const AS_READ_ONLY_PAGE_LOGGED = 219;
  82
  83         /**
  84          * Status: wiki is in readonly mode (wfReadOnly() == true)
  85          */
  86         const AS_READ_ONLY_PAGE = 220;
  87
  88         /**
  89          * Status: rate limiter for action 'edit' was tripped
  90          */
  91         const AS_RATE_LIMITED = 221;
  92
  93         /**
  94          * Status: article was deleted while editing and param wpRecreate == false or form
  95          * was not posted
  96          */
  97         const AS_ARTICLE_WAS_DELETED = 222;
  98
  99         /**
 100          * Status: user tried to create this page, but is not allowed to do that
 101          * ( Title->userCan('create') == false )
 102          */
 103         const AS_NO_CREATE_PERMISSION = 223;
 104
 105         /**
 106          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 107          */
 108         const AS_BLANK_ARTICLE = 224;
 109
 110         /**
 111          * Status: (non-resolvable) edit conflict
 112          */
 113         const AS_CONFLICT_DETECTED = 225;
 114
 115         /**
 116          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 117          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 118          */
 119         const AS_SUMMARY_NEEDED = 226;
 120
 121         /**
 122          * Status: user tried to create a new section without content
 123          */
 124         const AS_TEXTBOX_EMPTY = 228;
 125
 126         /**
 127          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 128          */
 129         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 130
 131         /**
 132          * Status: WikiPage::doEdit() was unsuccessful
 133          */
 134         const AS_END = 231;
 135
 136         /**
 137          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 138          */
 139         const AS_SPAM_ERROR = 232;
 140
 141         /**
 142          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 143          */
 144         const AS_IMAGE_REDIRECT_ANON = 233;
 145
 146         /**
 147          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 148          */
 149         const AS_IMAGE_REDIRECT_LOGGED = 234;
 150
 151         /**
 152          * Status: user tried to modify the content model, but is not allowed to do that
 153          * ( User::isAllowed('editcontentmodel') == false )
 154          */
 155         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 156
 157         /**
 158          * Status: user tried to create self-redirect (redirect to the same article) and
 159          * wpIgnoreSelfRedirect == false
 160          */
 161         const AS_SELF_REDIRECT = 236;
 162
 163         /**
 164          * Status: an error relating to change tagging. Look at the message key for
 165          * more details
 166          */
 167         const AS_CHANGE_TAG_ERROR = 237;
 168
 169         /**
 170          * Status: can't parse content
 171          */
 172         const AS_PARSE_ERROR = 240;
 173
 174         /**
 175          * Status: when changing the content model is disallowed due to
 176          * $wgContentHandlerUseDB being false
 177          */
 178         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 179
 180         /**
 181          * HTML id and name for the beginning of the edit form.
 182          */
 183         const EDITFORM_ID = 'editform';
 184
 185         /**
 186          * Prefix of key for cookie used to pass post-edit state.
 187          * The revision id edited is added after this
 188          */
 189         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 190
 191         /**
 192          * Duration of PostEdit cookie, in seconds.
 193          * The cookie will be removed instantly if the JavaScript runs.
 194          *
 195          * Otherwise, though, we don't want the cookies to accumulate.
 196          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 197          * limit of only 20 cookies per domain. This still applies at least to some
 198          * versions of IE without full updates:
 199          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 200          *
 201          * A value of 20 minutes should be enough to take into account slow loads and minor
 202          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 203          */
 204         const POST_EDIT_COOKIE_DURATION = 1200;
 205
 206         /** @var Article */
 207         public $mArticle;
 208         /** @var WikiPage */
 209         private $page;
 210
 211         /** @var Title */
 212         public $mTitle;
 213
 214         /** @var null|Title */
 215         private $mContextTitle = null;
 216
 217         /** @var string */
 218         public $action = 'submit';
 219
 220         /** @var bool */
 221         public $isConflict = false;
 222
 223         /** @var bool */
 224         public $isCssJsSubpage = false;
 225
 226         /** @var bool */
 227         public $isCssSubpage = false;
 228
 229         /** @var bool */
 230         public $isJsSubpage = false;
 231
 232         /** @var bool */
 233         public $isWrongCaseCssJsPage = false;
 234
 235         /** @var bool New page or new section */
 236         public $isNew = false;
 237
 238         /** @var bool */
 239         public $deletedSinceEdit;
 240
 241         /** @var string */
 242         public $formtype;
 243
 244         /** @var bool */
 245         public $firsttime;
 246
 247         /** @var bool|stdClass */
 248         public $lastDelete;
 249
 250         /** @var bool */
 251         public $mTokenOk = false;
 252
 253         /** @var bool */
 254         public $mTokenOkExceptSuffix = false;
 255
 256         /** @var bool */
 257         public $mTriedSave = false;
 258
 259         /** @var bool */
 260         public $incompleteForm = false;
 261
 262         /** @var bool */
 263         public $tooBig = false;
 264
 265         /** @var bool */
 266         public $missingComment = false;
 267
 268         /** @var bool */
 269         public $missingSummary = false;
 270
 271         /** @var bool */
 272         public $allowBlankSummary = false;
 273
 274         /** @var bool */
 275         protected $blankArticle = false;
 276
 277         /** @var bool */
 278         protected $allowBlankArticle = false;
 279
 280         /** @var bool */
 281         protected $selfRedirect = false;
 282
 283         /** @var bool */
 284         protected $allowSelfRedirect = false;
 285
 286         /** @var string */
 287         public $autoSumm = '';
 288
 289         /** @var string */
 290         public $hookError = '';
 291
 292         /** @var ParserOutput */
 293         public $mParserOutput;
 294
 295         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 296         public $hasPresetSummary = false;
 297
 298         /** @var Revision|bool */
 299         public $mBaseRevision = false;
 300
 301         /** @var bool */
 302         public $mShowSummaryField = true;
 303
 304         # Form values
 305
 306         /** @var bool */
 307         public $save = false;
 308
 309         /** @var bool */
 310         public $preview = false;
 311
 312         /** @var bool */
 313         public $diff = false;
 314
 315         /** @var bool */
 316         public $minoredit = false;
 317
 318         /** @var bool */
 319         public $watchthis = false;
 320
 321         /** @var bool */
 322         public $recreate = false;
 323
 324         /** @var string */
 325         public $textbox1 = '';
 326
 327         /** @var string */
 328         public $textbox2 = '';
 329
 330         /** @var string */
 331         public $summary = '';
 332
 333         /** @var bool */
 334         public $nosummary = false;
 335
 336         /** @var string */
 337         public $edittime = '';
 338
 339         /** @var int */
 340         private $editRevId = null;
 341
 342         /** @var string */
 343         public $section = '';
 344
 345         /** @var string */
 346         public $sectiontitle = '';
 347
 348         /** @var string */
 349         public $starttime = '';
 350
 351         /** @var int */
 352         public $oldid = 0;
 353
 354         /** @var int */
 355         public $parentRevId = 0;
 356
 357         /** @var string */
 358         public $editintro = '';
 359
 360         /** @var null */
 361         public $scrolltop = null;
 362
 363         /** @var bool */
 364         public $bot = true;
 365
 366         /** @var string */
 367         public $contentModel;
 368
 369         /** @var null|string */
 370         public $contentFormat = null;
 371
 372         /** @var null|array */
 373         private $changeTags = null;
 374
 375         # Placeholders for text injection by hooks (must be HTML)
 376         # extensions should take care to _append_ to the present value
 377
 378         /** @var string Before even the preview */
 379         public $editFormPageTop = '';
 380         public $editFormTextTop = '';
 381         public $editFormTextBeforeContent = '';
 382         public $editFormTextAfterWarn = '';
 383         public $editFormTextAfterTools = '';
 384         public $editFormTextBottom = '';
 385         public $editFormTextAfterContent = '';
 386         public $previewTextAfterContent = '';
 387         public $mPreloadContent = null;
 388
 389         /* $didSave should be set to true whenever an article was successfully altered. */
 390         public $didSave = false;
 391         public $undidRev = 0;
 392
 393         public $suppressIntro = false;
 394
 395         /** @var bool */
 396         protected $edit;
 397
 398         /** @var bool|int */
 399         protected $contentLength = false;
 400
 401         /**
 402          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 403          */
 404         private $enableApiEditOverride = false;
 405
 406         /**
 407          * @var IContextSource
 408          */
 409         protected $context;
 410
 411         /**
 412          * @var bool Whether an old revision is edited
 413          */
 414         private $isOldRev = false;
 415
 416         /**
 417          * @param Article $article
 418          */
 419         public function __construct( Article $article ) {
 420                 $this->mArticle = $article;
 421                 $this->page = $article->getPage(); // model object
 422                 $this->mTitle = $article->getTitle();
 423                 $this->context = $article->getContext();
 424
 425                 $this->contentModel = $this->mTitle->getContentModel();
 426
 427                 $handler = ContentHandler::getForModelID( $this->contentModel );
 428                 $this->contentFormat = $handler->getDefaultFormat();
 429         }
 430
 431         /**
 432          * @return Article
 433          */
 434         public function getArticle() {
 435                 return $this->mArticle;
 436         }
 437
 438         /**
 439          * @since 1.28
 440          * @return IContextSource
 441          */
 442         public function getContext() {
 443                 return $this->context;
 444         }
 445
 446         /**
 447          * @since 1.19
 448          * @return Title
 449          */
 450         public function getTitle() {
 451                 return $this->mTitle;
 452         }
 453
 454         /**
 455          * Set the context Title object
 456          *
 457          * @param Title|null $title Title object or null
 458          */
 459         public function setContextTitle( $title ) {
 460                 $this->mContextTitle = $title;
 461         }
 462
 463         /**
 464          * Get the context title object.
 465          * If not set, $wgTitle will be returned. This behavior might change in
 466          * the future to return $this->mTitle instead.
 467          *
 468          * @return Title
 469          */
 470         public function getContextTitle() {
 471                 if ( is_null( $this->mContextTitle ) ) {
 472                         global $wgTitle;
 473                         return $wgTitle;
 474                 } else {
 475                         return $this->mContextTitle;
 476                 }
 477         }
 478
 479         /**
 480          * Check if the edit page is using OOUI controls
 481          * @return bool Always true
 482          * @deprecated since 1.30
 483          */
 484         public function isOouiEnabled() {
 485                 return true;
 486         }
 487
 488         /**
 489          * Returns if the given content model is editable.
 490          *
 491          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 492          * @return bool
 493          * @throws MWException If $modelId has no known handler
 494          */
 495         public function isSupportedContentModel( $modelId ) {
 496                 return $this->enableApiEditOverride === true ||
 497                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 498         }
 499
 500         /**
 501          * Allow editing of content that supports API direct editing, but not general
 502          * direct editing. Set to false by default.
 503          *
 504          * @param bool $enableOverride
 505          */
 506         public function setApiEditOverride( $enableOverride ) {
 507                 $this->enableApiEditOverride = $enableOverride;
 508         }
 509
 510         /**
 511          * @deprecated since 1.29, call edit directly
 512          */
 513         public function submit() {
 514                 $this->edit();
 515         }
 516
 517         /**
 518          * This is the function that gets called for "action=edit". It
 519          * sets up various member variables, then passes execution to
 520          * another function, usually showEditForm()
 521          *
 522          * The edit form is self-submitting, so that when things like
 523          * preview and edit conflicts occur, we get the same form back
 524          * with the extra stuff added.  Only when the final submission
 525          * is made and all is well do we actually save and redirect to
 526          * the newly-edited page.
 527          */
 528         public function edit() {
 529                 global $wgOut, $wgRequest, $wgUser;
 530                 // Allow extensions to modify/prevent this form or submission
 531                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 532                         return;
 533                 }
 534
 535                 wfDebug( __METHOD__ . ": enter\n" );
 536
 537                 // If they used redlink=1 and the page exists, redirect to the main article
 538                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 539                         $wgOut->redirect( $this->mTitle->getFullURL() );
 540                         return;
 541                 }
 542
 543                 $this->importFormData( $wgRequest );
 544                 $this->firsttime = false;
 545
 546                 if ( wfReadOnly() && $this->save ) {
 547                         // Force preview
 548                         $this->save = false;
 549                         $this->preview = true;
 550                 }
 551
 552                 if ( $this->save ) {
 553                         $this->formtype = 'save';
 554                 } elseif ( $this->preview ) {
 555                         $this->formtype = 'preview';
 556                 } elseif ( $this->diff ) {
 557                         $this->formtype = 'diff';
 558                 } else { # First time through
 559                         $this->firsttime = true;
 560                         if ( $this->previewOnOpen() ) {
 561                                 $this->formtype = 'preview';
 562                         } else {
 563                                 $this->formtype = 'initial';
 564                         }
 565                 }
 566
 567                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 568                 if ( $permErrors ) {
 569                         wfDebug( __METHOD__ . ": User can't edit\n" );
 570                         // Auto-block user's IP if the account was "hard" blocked
 571                         if ( !wfReadOnly() ) {
 572                                 $user = $wgUser;
 573                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 574                                         $user->spreadAnyEditBlock();
 575                                 } );
 576                         }
 577                         $this->displayPermissionsError( $permErrors );
 578
 579                         return;
 580                 }
 581
 582                 $revision = $this->mArticle->getRevisionFetched();
 583                 // Disallow editing revisions with content models different from the current one
 584                 // Undo edits being an exception in order to allow reverting content model changes.
 585                 if ( $revision
 586                         && $revision->getContentModel() !== $this->contentModel
 587                 ) {
 588                         $prevRev = null;
 589                         if ( $this->undidRev ) {
 590                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 591                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 592                         }
 593                         if ( !$this->undidRev
 594                                 || !$prevRev
 595                                 || $prevRev->getContentModel() !== $this->contentModel
 596                         ) {
 597                                 $this->displayViewSourcePage(
 598                                         $this->getContentObject(),
 599                                         $this->context->msg(
 600                                                 'contentmodelediterror',
 601                                                 $revision->getContentModel(),
 602                                                 $this->contentModel
 603                                         )->plain()
 604                                 );
 605                                 return;
 606                         }
 607                 }
 608
 609                 $this->isConflict = false;
 610                 // css / js subpages of user pages get a special treatment
 611                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 612                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 613                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 614                 // @todo FIXME: Silly assignment.
 615                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 616
 617                 # Show applicable editing introductions
 618                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 619                         $this->showIntro();
 620                 }
 621
 622                 # Attempt submission here.  This will check for edit conflicts,
 623                 # and redundantly check for locked database, blocked IPs, etc.
 624                 # that edit() already checked just in case someone tries to sneak
 625                 # in the back door with a hand-edited submission URL.
 626
 627                 if ( 'save' == $this->formtype ) {
 628                         $resultDetails = null;
 629                         $status = $this->attemptSave( $resultDetails );
 630                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 631                                 return;
 632                         }
 633                 }
 634
 635                 # First time through: get contents, set time for conflict
 636                 # checking, etc.
 637                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 638                         if ( $this->initialiseForm() === false ) {
 639                                 $this->noSuchSectionPage();
 640                                 return;
 641                         }
 642
 643                         if ( !$this->mTitle->getArticleID() ) {
 644                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 645                         } else {
 646                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 647                         }
 648
 649                 }
 650
 651                 $this->showEditForm();
 652         }
 653
 654         /**
 655          * @param string $rigor Same format as Title::getUserPermissionErrors()
 656          * @return array
 657          */
 658         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 659                 global $wgUser;
 660
 661                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 662                 # Can this title be created?
 663                 if ( !$this->mTitle->exists() ) {
 664                         $permErrors = array_merge(
 665                                 $permErrors,
 666                                 wfArrayDiff2(
 667                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 668                                         $permErrors
 669                                 )
 670                         );
 671                 }
 672                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 673                 $remove = [];
 674                 foreach ( $permErrors as $error ) {
 675                         if ( ( $this->preview || $this->diff )
 676                                 && (
 677                                         $error[0] == 'blockedtext' ||
 678                                         $error[0] == 'autoblockedtext' ||
 679                                         $error[0] == 'systemblockedtext'
 680                                 )
 681                         ) {
 682                                 $remove[] = $error;
 683                         }
 684                 }
 685                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 686
 687                 return $permErrors;
 688         }
 689
 690         /**
 691          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 692          * but with the following differences:
 693          * - If redlink=1, the user will be redirected to the page
 694          * - If there is content to display or the error occurs while either saving,
 695          *   previewing or showing the difference, it will be a
 696          *   "View source for ..." page displaying the source code after the error message.
 697          *
 698          * @since 1.19
 699          * @param array $permErrors Array of permissions errors, as returned by
 700          *    Title::getUserPermissionsErrors().
 701          * @throws PermissionsError
 702          */
 703         protected function displayPermissionsError( array $permErrors ) {
 704                 global $wgRequest, $wgOut;
 705
 706                 if ( $wgRequest->getBool( 'redlink' ) ) {
 707                         // The edit page was reached via a red link.
 708                         // Redirect to the article page and let them click the edit tab if
 709                         // they really want a permission error.
 710                         $wgOut->redirect( $this->mTitle->getFullURL() );
 711                         return;
 712                 }
 713
 714                 $content = $this->getContentObject();
 715
 716                 # Use the normal message if there's nothing to display
 717                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 718                         $action = $this->mTitle->exists() ? 'edit' :
 719                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 720                         throw new PermissionsError( $action, $permErrors );
 721                 }
 722
 723                 $this->displayViewSourcePage(
 724                         $content,
 725                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 726                 );
 727         }
 728
 729         /**
 730          * Display a read-only View Source page
 731          * @param Content $content content object
 732          * @param string $errorMessage additional wikitext error message to display
 733          */
 734         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 735                 global $wgOut;
 736
 737                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$wgOut ] );
 738
 739                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 740                 $wgOut->setPageTitle( $this->context->msg(
 741                         'viewsource-title',
 742                         $this->getContextTitle()->getPrefixedText()
 743                 ) );
 744                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 745                 $wgOut->addHTML( $this->editFormPageTop );
 746                 $wgOut->addHTML( $this->editFormTextTop );
 747
 748                 if ( $errorMessage !== '' ) {
 749                         $wgOut->addWikiText( $errorMessage );
 750                         $wgOut->addHTML( "<hr />\n" );
 751                 }
 752
 753                 # If the user made changes, preserve them when showing the markup
 754                 # (This happens when a user is blocked during edit, for instance)
 755                 if ( !$this->firsttime ) {
 756                         $text = $this->textbox1;
 757                         $wgOut->addWikiMsg( 'viewyourtext' );
 758                 } else {
 759                         try {
 760                                 $text = $this->toEditText( $content );
 761                         } catch ( MWException $e ) {
 762                                 # Serialize using the default format if the content model is not supported
 763                                 # (e.g. for an old revision with a different model)
 764                                 $text = $content->serialize();
 765                         }
 766                         $wgOut->addWikiMsg( 'viewsourcetext' );
 767                 }
 768
 769                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 770                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 771                 $wgOut->addHTML( $this->editFormTextAfterContent );
 772
 773                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 774
 775                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 776
 777                 $wgOut->addHTML( $this->editFormTextBottom );
 778                 if ( $this->mTitle->exists() ) {
 779                         $wgOut->returnToMain( null, $this->mTitle );
 780                 }
 781         }
 782
 783         /**
 784          * Should we show a preview when the edit form is first shown?
 785          *
 786          * @return bool
 787          */
 788         protected function previewOnOpen() {
 789                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 790                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 791                         // Explicit override from request
 792                         return true;
 793                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 794                         // Explicit override from request
 795                         return false;
 796                 } elseif ( $this->section == 'new' ) {
 797                         // Nothing *to* preview for new sections
 798                         return false;
 799                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 800                         && $wgUser->getOption( 'previewonfirst' )
 801                 ) {
 802                         // Standard preference behavior
 803                         return true;
 804                 } elseif ( !$this->mTitle->exists()
 805                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 806                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 807                 ) {
 808                         // Categories are special
 809                         return true;
 810                 } else {
 811                         return false;
 812                 }
 813         }
 814
 815         /**
 816          * Checks whether the user entered a skin name in uppercase,
 817          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 818          *
 819          * @return bool
 820          */
 821         protected function isWrongCaseCssJsPage() {
 822                 if ( $this->mTitle->isCssJsSubpage() ) {
 823                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 824                         $skins = array_merge(
 825                                 array_keys( Skin::getSkinNames() ),
 826                                 [ 'common' ]
 827                         );
 828                         return !in_array( $name, $skins )
 829                                 && in_array( strtolower( $name ), $skins );
 830                 } else {
 831                         return false;
 832                 }
 833         }
 834
 835         /**
 836          * Returns whether section editing is supported for the current page.
 837          * Subclasses may override this to replace the default behavior, which is
 838          * to check ContentHandler::supportsSections.
 839          *
 840          * @return bool True if this edit page supports sections, false otherwise.
 841          */
 842         protected function isSectionEditSupported() {
 843                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 844                 return $contentHandler->supportsSections();
 845         }
 846
 847         /**
 848          * This function collects the form data and uses it to populate various member variables.
 849          * @param WebRequest &$request
 850          * @throws ErrorPageError
 851          */
 852         public function importFormData( &$request ) {
 853                 global $wgUser;
 854
 855                 # Section edit can come from either the form or a link
 856                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 857
 858                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 859                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 860                 }
 861
 862                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 863
 864                 if ( $request->wasPosted() ) {
 865                         # These fields need to be checked for encoding.
 866                         # Also remove trailing whitespace, but don't remove _initial_
 867                         # whitespace from the text boxes. This may be significant formatting.
 868                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 869                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 870                                 // Skip this if wpTextbox2 has input, it indicates that we came
 871                                 // from a conflict page with raw page text, not a custom form
 872                                 // modified by subclasses
 873                                 $textbox1 = $this->importContentFormData( $request );
 874                                 if ( $textbox1 !== null ) {
 875                                         $this->textbox1 = $textbox1;
 876                                 }
 877                         }
 878
 879                         $this->summary = $request->getText( 'wpSummary' );
 880
 881                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 882                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 883                         # section titles.
 884                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 885
 886                         # Treat sectiontitle the same way as summary.
 887                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 888                         # currently doing double duty as both edit summary and section title. Right now this
 889                         # is just to allow API edits to work around this limitation, but this should be
 890                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 891                         $this->sectiontitle = $request->getText( 'wpSectionTitle' );
 892                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 893
 894                         $this->edittime = $request->getVal( 'wpEdittime' );
 895                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 896                         $this->starttime = $request->getVal( 'wpStarttime' );
 897
 898                         $undidRev = $request->getInt( 'wpUndidRevision' );
 899                         if ( $undidRev ) {
 900                                 $this->undidRev = $undidRev;
 901                         }
 902
 903                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 904
 905                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 906                                 // wpTextbox1 field is missing, possibly due to being "too big"
 907                                 // according to some filter rules such as Suhosin's setting for
 908                                 // suhosin.request.max_value_length (d'oh)
 909                                 $this->incompleteForm = true;
 910                         } else {
 911                                 // If we receive the last parameter of the request, we can fairly
 912                                 // claim the POST request has not been truncated.
 913
 914                                 // TODO: softened the check for cutover.  Once we determine
 915                                 // that it is safe, we should complete the transition by
 916                                 // removing the "edittime" clause.
 917                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 918                                         && is_null( $this->edittime ) );
 919                         }
 920                         if ( $this->incompleteForm ) {
 921                                 # If the form is incomplete, force to preview.
 922                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 923                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 924                                 $this->preview = true;
 925                         } else {
 926                                 $this->preview = $request->getCheck( 'wpPreview' );
 927                                 $this->diff = $request->getCheck( 'wpDiff' );
 928
 929                                 // Remember whether a save was requested, so we can indicate
 930                                 // if we forced preview due to session failure.
 931                                 $this->mTriedSave = !$this->preview;
 932
 933                                 if ( $this->tokenOk( $request ) ) {
 934                                         # Some browsers will not report any submit button
 935                                         # if the user hits enter in the comment box.
 936                                         # The unmarked state will be assumed to be a save,
 937                                         # if the form seems otherwise complete.
 938                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 939                                 } elseif ( $this->diff ) {
 940                                         # Failed token check, but only requested "Show Changes".
 941                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 942                                 } else {
 943                                         # Page might be a hack attempt posted from
 944                                         # an external site. Preview instead of saving.
 945                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 946                                         $this->preview = true;
 947                                 }
 948                         }
 949                         $this->save = !$this->preview && !$this->diff;
 950                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 951                                 $this->edittime = null;
 952                         }
 953
 954                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 955                                 $this->starttime = null;
 956                         }
 957
 958                         $this->recreate = $request->getCheck( 'wpRecreate' );
 959
 960                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 961                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 962
 963                         # Don't force edit summaries when a user is editing their own user or talk page
 964                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 965                                 && $this->mTitle->getText() == $wgUser->getName()
 966                         ) {
 967                                 $this->allowBlankSummary = true;
 968                         } else {
 969                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 970                                         || !$wgUser->getOption( 'forceeditsummary' );
 971                         }
 972
 973                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 974
 975                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 976                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 977
 978                         $changeTags = $request->getVal( 'wpChangeTags' );
 979                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 980                                 $this->changeTags = [];
 981                         } else {
 982                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 983                                         $changeTags ) ) );
 984                         }
 985                 } else {
 986                         # Not a posted form? Start with nothing.
 987                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 988                         $this->textbox1 = '';
 989                         $this->summary = '';
 990                         $this->sectiontitle = '';
 991                         $this->edittime = '';
 992                         $this->editRevId = null;
 993                         $this->starttime = wfTimestampNow();
 994                         $this->edit = false;
 995                         $this->preview = false;
 996                         $this->save = false;
 997                         $this->diff = false;
 998                         $this->minoredit = false;
 999                         // Watch may be overridden by request parameters
1000                         $this->watchthis = $request->getBool( 'watchthis', false );
1001                         $this->recreate = false;
1002
1003                         // When creating a new section, we can preload a section title by passing it as the
1004                         // preloadtitle parameter in the URL (T15100)
1005                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1006                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1007                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1008                                 $this->summary = $request->getVal( 'preloadtitle' );
1009                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1010                                 $this->summary = $request->getText( 'summary' );
1011                                 if ( $this->summary !== '' ) {
1012                                         $this->hasPresetSummary = true;
1013                                 }
1014                         }
1015
1016                         if ( $request->getVal( 'minor' ) ) {
1017                                 $this->minoredit = true;
1018                         }
1019                 }
1020
1021                 $this->oldid = $request->getInt( 'oldid' );
1022                 $this->parentRevId = $request->getInt( 'parentRevId' );
1023
1024                 $this->bot = $request->getBool( 'bot', true );
1025                 $this->nosummary = $request->getBool( 'nosummary' );
1026
1027                 // May be overridden by revision.
1028                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1029                 // May be overridden by revision.
1030                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1031
1032                 try {
1033                         $handler = ContentHandler::getForModelID( $this->contentModel );
1034                 } catch ( MWUnknownContentModelException $e ) {
1035                         throw new ErrorPageError(
1036                                 'editpage-invalidcontentmodel-title',
1037                                 'editpage-invalidcontentmodel-text',
1038                                 [ wfEscapeWikiText( $this->contentModel ) ]
1039                         );
1040                 }
1041
1042                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1043                         throw new ErrorPageError(
1044                                 'editpage-notsupportedcontentformat-title',
1045                                 'editpage-notsupportedcontentformat-text',
1046                                 [
1047                                         wfEscapeWikiText( $this->contentFormat ),
1048                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1049                                 ]
1050                         );
1051                 }
1052
1053                 /**
1054                  * @todo Check if the desired model is allowed in this namespace, and if
1055                  *   a transition from the page's current model to the new model is
1056                  *   allowed.
1057                  */
1058
1059                 $this->editintro = $request->getText( 'editintro',
1060                         // Custom edit intro for new sections
1061                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1062
1063                 // Allow extensions to modify form data
1064                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1065         }
1066
1067         /**
1068          * Subpage overridable method for extracting the page content data from the
1069          * posted form to be placed in $this->textbox1, if using customized input
1070          * this method should be overridden and return the page text that will be used
1071          * for saving, preview parsing and so on...
1072          *
1073          * @param WebRequest &$request
1074          * @return string|null
1075          */
1076         protected function importContentFormData( &$request ) {
1077                 return; // Don't do anything, EditPage already extracted wpTextbox1
1078         }
1079
1080         /**
1081          * Initialise form fields in the object
1082          * Called on the first invocation, e.g. when a user clicks an edit link
1083          * @return bool If the requested section is valid
1084          */
1085         public function initialiseForm() {
1086                 global $wgUser;
1087                 $this->edittime = $this->page->getTimestamp();
1088                 $this->editRevId = $this->page->getLatest();
1089
1090                 $content = $this->getContentObject( false ); # TODO: track content object?!
1091                 if ( $content === false ) {
1092                         return false;
1093                 }
1094                 $this->textbox1 = $this->toEditText( $content );
1095
1096                 // activate checkboxes if user wants them to be always active
1097                 # Sort out the "watch" checkbox
1098                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1099                         # Watch all edits
1100                         $this->watchthis = true;
1101                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1102                         # Watch creations
1103                         $this->watchthis = true;
1104                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1105                         # Already watched
1106                         $this->watchthis = true;
1107                 }
1108                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1109                         $this->minoredit = true;
1110                 }
1111                 if ( $this->textbox1 === false ) {
1112                         return false;
1113                 }
1114                 return true;
1115         }
1116
1117         /**
1118          * @param Content|null $def_content The default value to return
1119          *
1120          * @return Content|null Content on success, $def_content for invalid sections
1121          *
1122          * @since 1.21
1123          */
1124         protected function getContentObject( $def_content = null ) {
1125                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1126
1127                 $content = false;
1128
1129                 // For message page not locally set, use the i18n message.
1130                 // For other non-existent articles, use preload text if any.
1131                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1132                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1133                                 # If this is a system message, get the default text.
1134                                 $msg = $this->mTitle->getDefaultMessageText();
1135
1136                                 $content = $this->toEditContent( $msg );
1137                         }
1138                         if ( $content === false ) {
1139                                 # If requested, preload some text.
1140                                 $preload = $wgRequest->getVal( 'preload',
1141                                         // Custom preload text for new sections
1142                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1143                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1144
1145                                 $content = $this->getPreloadedContent( $preload, $params );
1146                         }
1147                 // For existing pages, get text based on "undo" or section parameters.
1148                 } else {
1149                         if ( $this->section != '' ) {
1150                                 // Get section edit text (returns $def_text for invalid sections)
1151                                 $orig = $this->getOriginalContent( $wgUser );
1152                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1153
1154                                 if ( !$content ) {
1155                                         $content = $def_content;
1156                                 }
1157                         } else {
1158                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1159                                 $undo = $wgRequest->getInt( 'undo' );
1160
1161                                 if ( $undo > 0 && $undoafter > 0 ) {
1162                                         $undorev = Revision::newFromId( $undo );
1163                                         $oldrev = Revision::newFromId( $undoafter );
1164
1165                                         # Sanity check, make sure it's the right page,
1166                                         # the revisions exist and they were not deleted.
1167                                         # Otherwise, $content will be left as-is.
1168                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1169                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1170                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1171                                         ) {
1172                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1173
1174                                                 if ( $content === false ) {
1175                                                         # Warn the user that something went wrong
1176                                                         $undoMsg = 'failure';
1177                                                 } else {
1178                                                         $oldContent = $this->page->getContent( Revision::RAW );
1179                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1180                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1181                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1182                                                                 // The undo may change content
1183                                                                 // model if its reverting the top
1184                                                                 // edit. This can result in
1185                                                                 // mismatched content model/format.
1186                                                                 $this->contentModel = $newContent->getModel();
1187                                                                 $this->contentFormat = $oldrev->getContentFormat();
1188                                                         }
1189
1190                                                         if ( $newContent->equals( $oldContent ) ) {
1191                                                                 # Tell the user that the undo results in no change,
1192                                                                 # i.e. the revisions were already undone.
1193                                                                 $undoMsg = 'nochange';
1194                                                                 $content = false;
1195                                                         } else {
1196                                                                 # Inform the user of our success and set an automatic edit summary
1197                                                                 $undoMsg = 'success';
1198
1199                                                                 # If we just undid one rev, use an autosummary
1200                                                                 $firstrev = $oldrev->getNext();
1201                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1202                                                                         $userText = $undorev->getUserText();
1203                                                                         if ( $userText === '' ) {
1204                                                                                 $undoSummary = $this->context->msg(
1205                                                                                         'undo-summary-username-hidden',
1206                                                                                         $undo
1207                                                                                 )->inContentLanguage()->text();
1208                                                                         } else {
1209                                                                                 $undoSummary = $this->context->msg(
1210                                                                                         'undo-summary',
1211                                                                                         $undo,
1212                                                                                         $userText
1213                                                                                 )->inContentLanguage()->text();
1214                                                                         }
1215                                                                         if ( $this->summary === '' ) {
1216                                                                                 $this->summary = $undoSummary;
1217                                                                         } else {
1218                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1219                                                                                         ->inContentLanguage()->text() . $this->summary;
1220                                                                         }
1221                                                                         $this->undidRev = $undo;
1222                                                                 }
1223                                                                 $this->formtype = 'diff';
1224                                                         }
1225                                                 }
1226                                         } else {
1227                                                 // Failed basic sanity checks.
1228                                                 // Older revisions may have been removed since the link
1229                                                 // was created, or we may simply have got bogus input.
1230                                                 $undoMsg = 'norev';
1231                                         }
1232
1233                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1234                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1235                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1236                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1237                                 }
1238
1239                                 if ( $content === false ) {
1240                                         $content = $this->getOriginalContent( $wgUser );
1241                                 }
1242                         }
1243                 }
1244
1245                 return $content;
1246         }
1247
1248         /**
1249          * Get the content of the wanted revision, without section extraction.
1250          *
1251          * The result of this function can be used to compare user's input with
1252          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1253          * to the original text of the edit.
1254          *
1255          * This differs from Article::getContent() that when a missing revision is
1256          * encountered the result will be null and not the
1257          * 'missing-revision' message.
1258          *
1259          * @since 1.19
1260          * @param User $user The user to get the revision for
1261          * @return Content|null
1262          */
1263         private function getOriginalContent( User $user ) {
1264                 if ( $this->section == 'new' ) {
1265                         return $this->getCurrentContent();
1266                 }
1267                 $revision = $this->mArticle->getRevisionFetched();
1268                 if ( $revision === null ) {
1269                         $handler = ContentHandler::getForModelID( $this->contentModel );
1270                         return $handler->makeEmptyContent();
1271                 }
1272                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1273                 return $content;
1274         }
1275
1276         /**
1277          * Get the edit's parent revision ID
1278          *
1279          * The "parent" revision is the ancestor that should be recorded in this
1280          * page's revision history.  It is either the revision ID of the in-memory
1281          * article content, or in the case of a 3-way merge in order to rebase
1282          * across a recoverable edit conflict, the ID of the newer revision to
1283          * which we have rebased this page.
1284          *
1285          * @since 1.27
1286          * @return int Revision ID
1287          */
1288         public function getParentRevId() {
1289                 if ( $this->parentRevId ) {
1290                         return $this->parentRevId;
1291                 } else {
1292                         return $this->mArticle->getRevIdFetched();
1293                 }
1294         }
1295
1296         /**
1297          * Get the current content of the page. This is basically similar to
1298          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1299          * content object is returned instead of null.
1300          *
1301          * @since 1.21
1302          * @return Content
1303          */
1304         protected function getCurrentContent() {
1305                 $rev = $this->page->getRevision();
1306                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1307
1308                 if ( $content === false || $content === null ) {
1309                         $handler = ContentHandler::getForModelID( $this->contentModel );
1310                         return $handler->makeEmptyContent();
1311                 } elseif ( !$this->undidRev ) {
1312                         // Content models should always be the same since we error
1313                         // out if they are different before this point (in ->edit()).
1314                         // The exception being, during an undo, the current revision might
1315                         // differ from the prior revision.
1316                         $logger = LoggerFactory::getInstance( 'editpage' );
1317                         if ( $this->contentModel !== $rev->getContentModel() ) {
1318                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1319                                         'prev' => $this->contentModel,
1320                                         'new' => $rev->getContentModel(),
1321                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1322                                         'method' => __METHOD__
1323                                 ] );
1324                                 $this->contentModel = $rev->getContentModel();
1325                         }
1326
1327                         // Given that the content models should match, the current selected
1328                         // format should be supported.
1329                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1330                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1331
1332                                         'prev' => $this->contentFormat,
1333                                         'new' => $rev->getContentFormat(),
1334                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1335                                         'method' => __METHOD__
1336                                 ] );
1337                                 $this->contentFormat = $rev->getContentFormat();
1338                         }
1339                 }
1340                 return $content;
1341         }
1342
1343         /**
1344          * Use this method before edit() to preload some content into the edit box
1345          *
1346          * @param Content $content
1347          *
1348          * @since 1.21
1349          */
1350         public function setPreloadedContent( Content $content ) {
1351                 $this->mPreloadContent = $content;
1352         }
1353
1354         /**
1355          * Get the contents to be preloaded into the box, either set by
1356          * an earlier setPreloadText() or by loading the given page.
1357          *
1358          * @param string $preload Representing the title to preload from.
1359          * @param array $params Parameters to use (interface-message style) in the preloaded text
1360          *
1361          * @return Content
1362          *
1363          * @since 1.21
1364          */
1365         protected function getPreloadedContent( $preload, $params = [] ) {
1366                 global $wgUser;
1367
1368                 if ( !empty( $this->mPreloadContent ) ) {
1369                         return $this->mPreloadContent;
1370                 }
1371
1372                 $handler = ContentHandler::getForModelID( $this->contentModel );
1373
1374                 if ( $preload === '' ) {
1375                         return $handler->makeEmptyContent();
1376                 }
1377
1378                 $title = Title::newFromText( $preload );
1379                 # Check for existence to avoid getting MediaWiki:Noarticletext
1380                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1381                         // TODO: somehow show a warning to the user!
1382                         return $handler->makeEmptyContent();
1383                 }
1384
1385                 $page = WikiPage::factory( $title );
1386                 if ( $page->isRedirect() ) {
1387                         $title = $page->getRedirectTarget();
1388                         # Same as before
1389                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1390                                 // TODO: somehow show a warning to the user!
1391                                 return $handler->makeEmptyContent();
1392                         }
1393                         $page = WikiPage::factory( $title );
1394                 }
1395
1396                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1397                 $content = $page->getContent( Revision::RAW );
1398
1399                 if ( !$content ) {
1400                         // TODO: somehow show a warning to the user!
1401                         return $handler->makeEmptyContent();
1402                 }
1403
1404                 if ( $content->getModel() !== $handler->getModelID() ) {
1405                         $converted = $content->convert( $handler->getModelID() );
1406
1407                         if ( !$converted ) {
1408                                 // TODO: somehow show a warning to the user!
1409                                 wfDebug( "Attempt to preload incompatible content: " .
1410                                         "can't convert " . $content->getModel() .
1411                                         " to " . $handler->getModelID() );
1412
1413                                 return $handler->makeEmptyContent();
1414                         }
1415
1416                         $content = $converted;
1417                 }
1418
1419                 return $content->preloadTransform( $title, $parserOptions, $params );
1420         }
1421
1422         /**
1423          * Make sure the form isn't faking a user's credentials.
1424          *
1425          * @param WebRequest &$request
1426          * @return bool
1427          * @private
1428          */
1429         public function tokenOk( &$request ) {
1430                 global $wgUser;
1431                 $token = $request->getVal( 'wpEditToken' );
1432                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1433                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1434                 return $this->mTokenOk;
1435         }
1436
1437         /**
1438          * Sets post-edit cookie indicating the user just saved a particular revision.
1439          *
1440          * This uses a temporary cookie for each revision ID so separate saves will never
1441          * interfere with each other.
1442          *
1443          * Article::view deletes the cookie on server-side after the redirect and
1444          * converts the value to the global JavaScript variable wgPostEdit.
1445          *
1446          * If the variable were set on the server, it would be cached, which is unwanted
1447          * since the post-edit state should only apply to the load right after the save.
1448          *
1449          * @param int $statusValue The status value (to check for new article status)
1450          */
1451         protected function setPostEditCookie( $statusValue ) {
1452                 $revisionId = $this->page->getLatest();
1453                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1454
1455                 $val = 'saved';
1456                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1457                         $val = 'created';
1458                 } elseif ( $this->oldid ) {
1459                         $val = 'restored';
1460                 }
1461
1462                 $response = RequestContext::getMain()->getRequest()->response();
1463                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1464         }
1465
1466         /**
1467          * Attempt submission
1468          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1469          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1470          * @return Status The resulting status object.
1471          */
1472         public function attemptSave( &$resultDetails = false ) {
1473                 global $wgUser;
1474
1475                 # Allow bots to exempt some edits from bot flagging
1476                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1477                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1478
1479                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1480
1481                 return $status;
1482         }
1483
1484         /**
1485          * Log when a page was successfully saved after the edit conflict view
1486          */
1487         private function incrementResolvedConflicts() {
1488                 global $wgRequest;
1489
1490                 if ( $wgRequest->getText( 'mode' ) !== 'conflict' ) {
1491                         return;
1492                 }
1493
1494                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
1495                 $stats->increment( 'edit.failures.conflict.resolved' );
1496         }
1497
1498         /**
1499          * Handle status, such as after attempt save
1500          *
1501          * @param Status $status
1502          * @param array|bool $resultDetails
1503          *
1504          * @throws ErrorPageError
1505          * @return bool False, if output is done, true if rest of the form should be displayed
1506          */
1507         private function handleStatus( Status $status, $resultDetails ) {
1508                 global $wgUser, $wgOut;
1509
1510                 /**
1511                  * @todo FIXME: once the interface for internalAttemptSave() is made
1512                  *   nicer, this should use the message in $status
1513                  */
1514                 if ( $status->value == self::AS_SUCCESS_UPDATE
1515                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1516                 ) {
1517                         $this->incrementResolvedConflicts();
1518
1519                         $this->didSave = true;
1520                         if ( !$resultDetails['nullEdit'] ) {
1521                                 $this->setPostEditCookie( $status->value );
1522                         }
1523                 }
1524
1525                 // "wpExtraQueryRedirect" is a hidden input to modify
1526                 // after save URL and is not used by actual edit form
1527                 $request = RequestContext::getMain()->getRequest();
1528                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1529
1530                 switch ( $status->value ) {
1531                         case self::AS_HOOK_ERROR_EXPECTED:
1532                         case self::AS_CONTENT_TOO_BIG:
1533                         case self::AS_ARTICLE_WAS_DELETED:
1534                         case self::AS_CONFLICT_DETECTED:
1535                         case self::AS_SUMMARY_NEEDED:
1536                         case self::AS_TEXTBOX_EMPTY:
1537                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1538                         case self::AS_END:
1539                         case self::AS_BLANK_ARTICLE:
1540                         case self::AS_SELF_REDIRECT:
1541                                 return true;
1542
1543                         case self::AS_HOOK_ERROR:
1544                                 return false;
1545
1546                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1547                         case self::AS_PARSE_ERROR:
1548                                 $wgOut->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1549                                 return true;
1550
1551                         case self::AS_SUCCESS_NEW_ARTICLE:
1552                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1553                                 if ( $extraQueryRedirect ) {
1554                                         if ( $query === '' ) {
1555                                                 $query = $extraQueryRedirect;
1556                                         } else {
1557                                                 $query = $query . '&' . $extraQueryRedirect;
1558                                         }
1559                                 }
1560                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1561                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1562                                 return false;
1563
1564                         case self::AS_SUCCESS_UPDATE:
1565                                 $extraQuery = '';
1566                                 $sectionanchor = $resultDetails['sectionanchor'];
1567
1568                                 // Give extensions a chance to modify URL query on update
1569                                 Hooks::run(
1570                                         'ArticleUpdateBeforeRedirect',
1571                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1572                                 );
1573
1574                                 if ( $resultDetails['redirect'] ) {
1575                                         if ( $extraQuery == '' ) {
1576                                                 $extraQuery = 'redirect=no';
1577                                         } else {
1578                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1579                                         }
1580                                 }
1581                                 if ( $extraQueryRedirect ) {
1582                                         if ( $extraQuery === '' ) {
1583                                                 $extraQuery = $extraQueryRedirect;
1584                                         } else {
1585                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1586                                         }
1587                                 }
1588
1589                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1590                                 return false;
1591
1592                         case self::AS_SPAM_ERROR:
1593                                 $this->spamPageWithContent( $resultDetails['spam'] );
1594                                 return false;
1595
1596                         case self::AS_BLOCKED_PAGE_FOR_USER:
1597                                 throw new UserBlockedError( $wgUser->getBlock() );
1598
1599                         case self::AS_IMAGE_REDIRECT_ANON:
1600                         case self::AS_IMAGE_REDIRECT_LOGGED:
1601                                 throw new PermissionsError( 'upload' );
1602
1603                         case self::AS_READ_ONLY_PAGE_ANON:
1604                         case self::AS_READ_ONLY_PAGE_LOGGED:
1605                                 throw new PermissionsError( 'edit' );
1606
1607                         case self::AS_READ_ONLY_PAGE:
1608                                 throw new ReadOnlyError;
1609
1610                         case self::AS_RATE_LIMITED:
1611                                 throw new ThrottledError();
1612
1613                         case self::AS_NO_CREATE_PERMISSION:
1614                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1615                                 throw new PermissionsError( $permission );
1616
1617                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1618                                 throw new PermissionsError( 'editcontentmodel' );
1619
1620                         default:
1621                                 // We don't recognize $status->value. The only way that can happen
1622                                 // is if an extension hook aborted from inside ArticleSave.
1623                                 // Render the status object into $this->hookError
1624                                 // FIXME this sucks, we should just use the Status object throughout
1625                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1626                                         '</div>';
1627                                 return true;
1628                 }
1629         }
1630
1631         /**
1632          * Run hooks that can filter edits just before they get saved.
1633          *
1634          * @param Content $content The Content to filter.
1635          * @param Status $status For reporting the outcome to the caller
1636          * @param User $user The user performing the edit
1637          *
1638          * @return bool
1639          */
1640         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1641                 // Run old style post-section-merge edit filter
1642                 if ( $this->hookError != '' ) {
1643                         # ...or the hook could be expecting us to produce an error
1644                         $status->fatal( 'hookaborted' );
1645                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1646                         return false;
1647                 }
1648
1649                 // Run new style post-section-merge edit filter
1650                 if ( !Hooks::run( 'EditFilterMergedContent',
1651                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1652                                 $user, $this->minoredit ] )
1653                 ) {
1654                         # Error messages etc. could be handled within the hook...
1655                         if ( $status->isGood() ) {
1656                                 $status->fatal( 'hookaborted' );
1657                                 // Not setting $this->hookError here is a hack to allow the hook
1658                                 // to cause a return to the edit page without $this->hookError
1659                                 // being set. This is used by ConfirmEdit to display a captcha
1660                                 // without any error message cruft.
1661                         } else {
1662                                 $this->hookError = $status->getWikiText();
1663                         }
1664                         // Use the existing $status->value if the hook set it
1665                         if ( !$status->value ) {
1666                                 $status->value = self::AS_HOOK_ERROR;
1667                         }
1668                         return false;
1669                 } elseif ( !$status->isOK() ) {
1670                         # ...or the hook could be expecting us to produce an error
1671                         // FIXME this sucks, we should just use the Status object throughout
1672                         $this->hookError = $status->getWikiText();
1673                         $status->fatal( 'hookaborted' );
1674                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1675                         return false;
1676                 }
1677
1678                 return true;
1679         }
1680
1681         /**
1682          * Return the summary to be used for a new section.
1683          *
1684          * @param string $sectionanchor Set to the section anchor text
1685          * @return string
1686          */
1687         private function newSectionSummary( &$sectionanchor = null ) {
1688                 global $wgParser;
1689
1690                 if ( $this->sectiontitle !== '' ) {
1691                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1692                         // If no edit summary was specified, create one automatically from the section
1693                         // title and have it link to the new section. Otherwise, respect the summary as
1694                         // passed.
1695                         if ( $this->summary === '' ) {
1696                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1697                                 return $this->context->msg( 'newsectionsummary' )
1698                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1699                         }
1700                 } elseif ( $this->summary !== '' ) {
1701                         $sectionanchor = $this->guessSectionName( $this->summary );
1702                         # This is a new section, so create a link to the new section
1703                         # in the revision summary.
1704                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1705                         return $this->context->msg( 'newsectionsummary' )
1706                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1707                 }
1708                 return $this->summary;
1709         }
1710
1711         /**
1712          * Attempt submission (no UI)
1713          *
1714          * @param array &$result Array to add statuses to, currently with the
1715          *   possible keys:
1716          *   - spam (string): Spam string from content if any spam is detected by
1717          *     matchSpamRegex.
1718          *   - sectionanchor (string): Section anchor for a section save.
1719          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1720          *     false otherwise.
1721          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1722          *     revision is a redirect.
1723          * @param bool $bot True if edit is being made under the bot right.
1724          *
1725          * @return Status Status object, possibly with a message, but always with
1726          *   one of the AS_* constants in $status->value,
1727          *
1728          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1729          *   various error display idiosyncrasies. There are also lots of cases
1730          *   where error metadata is set in the object and retrieved later instead
1731          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1732          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1733          * time.
1734          */
1735         public function internalAttemptSave( &$result, $bot = false ) {
1736                 global $wgUser, $wgRequest, $wgMaxArticleSize;
1737                 global $wgContentHandlerUseDB;
1738
1739                 $status = Status::newGood();
1740
1741                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1742                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1743                         $status->fatal( 'hookaborted' );
1744                         $status->value = self::AS_HOOK_ERROR;
1745                         return $status;
1746                 }
1747
1748                 $spam = $wgRequest->getText( 'wpAntispam' );
1749                 if ( $spam !== '' ) {
1750                         wfDebugLog(
1751                                 'SimpleAntiSpam',
1752                                 $wgUser->getName() .
1753                                 ' editing "' .
1754                                 $this->mTitle->getPrefixedText() .
1755                                 '" submitted bogus field "' .
1756                                 $spam .
1757                                 '"'
1758                         );
1759                         $status->fatal( 'spamprotectionmatch', false );
1760                         $status->value = self::AS_SPAM_ERROR;
1761                         return $status;
1762                 }
1763
1764                 try {
1765                         # Construct Content object
1766                         $textbox_content = $this->toEditContent( $this->textbox1 );
1767                 } catch ( MWContentSerializationException $ex ) {
1768                         $status->fatal(
1769                                 'content-failed-to-parse',
1770                                 $this->contentModel,
1771                                 $this->contentFormat,
1772                                 $ex->getMessage()
1773                         );
1774                         $status->value = self::AS_PARSE_ERROR;
1775                         return $status;
1776                 }
1777
1778                 # Check image redirect
1779                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1780                         $textbox_content->isRedirect() &&
1781                         !$wgUser->isAllowed( 'upload' )
1782                 ) {
1783                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1784                                 $status->setResult( false, $code );
1785
1786                                 return $status;
1787                 }
1788
1789                 # Check for spam
1790                 $match = self::matchSummarySpamRegex( $this->summary );
1791                 if ( $match === false && $this->section == 'new' ) {
1792                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1793                         # regular summaries, it is added to the actual wikitext.
1794                         if ( $this->sectiontitle !== '' ) {
1795                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1796                                 $match = self::matchSpamRegex( $this->sectiontitle );
1797                         } else {
1798                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1799                                 # is used with the 'summary' parameter.
1800                                 $match = self::matchSpamRegex( $this->summary );
1801                         }
1802                 }
1803                 if ( $match === false ) {
1804                         $match = self::matchSpamRegex( $this->textbox1 );
1805                 }
1806                 if ( $match !== false ) {
1807                         $result['spam'] = $match;
1808                         $ip = $wgRequest->getIP();
1809                         $pdbk = $this->mTitle->getPrefixedDBkey();
1810                         $match = str_replace( "\n", '', $match );
1811                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1812                         $status->fatal( 'spamprotectionmatch', $match );
1813                         $status->value = self::AS_SPAM_ERROR;
1814                         return $status;
1815                 }
1816                 if ( !Hooks::run(
1817                         'EditFilter',
1818                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1819                 ) {
1820                         # Error messages etc. could be handled within the hook...
1821                         $status->fatal( 'hookaborted' );
1822                         $status->value = self::AS_HOOK_ERROR;
1823                         return $status;
1824                 } elseif ( $this->hookError != '' ) {
1825                         # ...or the hook could be expecting us to produce an error
1826                         $status->fatal( 'hookaborted' );
1827                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1828                         return $status;
1829                 }
1830
1831                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1832                         // Auto-block user's IP if the account was "hard" blocked
1833                         if ( !wfReadOnly() ) {
1834                                 $wgUser->spreadAnyEditBlock();
1835                         }
1836                         # Check block state against master, thus 'false'.
1837                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1838                         return $status;
1839                 }
1840
1841                 $this->contentLength = strlen( $this->textbox1 );
1842                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1843                         // Error will be displayed by showEditForm()
1844                         $this->tooBig = true;
1845                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1846                         return $status;
1847                 }
1848
1849                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1850                         if ( $wgUser->isAnon() ) {
1851                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1852                                 return $status;
1853                         } else {
1854                                 $status->fatal( 'readonlytext' );
1855                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1856                                 return $status;
1857                         }
1858                 }
1859
1860                 $changingContentModel = false;
1861                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1862                         if ( !$wgContentHandlerUseDB ) {
1863                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1864                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1865                                 return $status;
1866                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1867                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1868                                 return $status;
1869                         }
1870                         // Make sure the user can edit the page under the new content model too
1871                         $titleWithNewContentModel = clone $this->mTitle;
1872                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1873                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1874                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1875                         ) {
1876                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1877                                 return $status;
1878                         }
1879
1880                         $changingContentModel = true;
1881                         $oldContentModel = $this->mTitle->getContentModel();
1882                 }
1883
1884                 if ( $this->changeTags ) {
1885                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1886                                 $this->changeTags, $wgUser );
1887                         if ( !$changeTagsStatus->isOK() ) {
1888                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1889                                 return $changeTagsStatus;
1890                         }
1891                 }
1892
1893                 if ( wfReadOnly() ) {
1894                         $status->fatal( 'readonlytext' );
1895                         $status->value = self::AS_READ_ONLY_PAGE;
1896                         return $status;
1897                 }
1898                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1899                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1900                 ) {
1901                         $status->fatal( 'actionthrottledtext' );
1902                         $status->value = self::AS_RATE_LIMITED;
1903                         return $status;
1904                 }
1905
1906                 # If the article has been deleted while editing, don't save it without
1907                 # confirmation
1908                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1909                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1910                         return $status;
1911                 }
1912
1913                 # Load the page data from the master. If anything changes in the meantime,
1914                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1915                 $this->page->loadPageData( 'fromdbmaster' );
1916                 $new = !$this->page->exists();
1917
1918                 if ( $new ) {
1919                         // Late check for create permission, just in case *PARANOIA*
1920                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1921                                 $status->fatal( 'nocreatetext' );
1922                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1923                                 wfDebug( __METHOD__ . ": no create permission\n" );
1924                                 return $status;
1925                         }
1926
1927                         // Don't save a new page if it's blank or if it's a MediaWiki:
1928                         // message with content equivalent to default (allow empty pages
1929                         // in this case to disable messages, see T52124)
1930                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1931                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1932                                 $defaultText = $defaultMessageText;
1933                         } else {
1934                                 $defaultText = '';
1935                         }
1936
1937                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1938                                 $this->blankArticle = true;
1939                                 $status->fatal( 'blankarticle' );
1940                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1941                                 return $status;
1942                         }
1943
1944                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1945                                 return $status;
1946                         }
1947
1948                         $content = $textbox_content;
1949
1950                         $result['sectionanchor'] = '';
1951                         if ( $this->section == 'new' ) {
1952                                 if ( $this->sectiontitle !== '' ) {
1953                                         // Insert the section title above the content.
1954                                         $content = $content->addSectionHeader( $this->sectiontitle );
1955                                 } elseif ( $this->summary !== '' ) {
1956                                         // Insert the section title above the content.
1957                                         $content = $content->addSectionHeader( $this->summary );
1958                                 }
1959                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1960                         }
1961
1962                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1963
1964                 } else { # not $new
1965
1966                         # Article exists. Check for edit conflict.
1967
1968                         $this->page->clear(); # Force reload of dates, etc.
1969                         $timestamp = $this->page->getTimestamp();
1970                         $latest = $this->page->getLatest();
1971
1972                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1973
1974                         // Check editRevId if set, which handles same-second timestamp collisions
1975                         if ( $timestamp != $this->edittime
1976                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1977                         ) {
1978                                 $this->isConflict = true;
1979                                 if ( $this->section == 'new' ) {
1980                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1981                                                 $this->page->getComment() == $this->newSectionSummary()
1982                                         ) {
1983                                                 // Probably a duplicate submission of a new comment.
1984                                                 // This can happen when CDN resends a request after
1985                                                 // a timeout but the first one actually went through.
1986                                                 wfDebug( __METHOD__
1987                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1988                                         } else {
1989                                                 // New comment; suppress conflict.
1990                                                 $this->isConflict = false;
1991                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1992                                         }
1993                                 } elseif ( $this->section == ''
1994                                         && Revision::userWasLastToEdit(
1995                                                 DB_MASTER, $this->mTitle->getArticleID(),
1996                                                 $wgUser->getId(), $this->edittime
1997                                         )
1998                                 ) {
1999                                         # Suppress edit conflict with self, except for section edits where merging is required.
2000                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2001                                         $this->isConflict = false;
2002                                 }
2003                         }
2004
2005                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2006                         if ( $this->sectiontitle !== '' ) {
2007                                 $sectionTitle = $this->sectiontitle;
2008                         } else {
2009                                 $sectionTitle = $this->summary;
2010                         }
2011
2012                         $content = null;
2013
2014                         if ( $this->isConflict ) {
2015                                 wfDebug( __METHOD__
2016                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2017                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2018                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2019                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2020                                 if ( $this->editRevId !== null ) {
2021                                         $content = $this->page->replaceSectionAtRev(
2022                                                 $this->section,
2023                                                 $textbox_content,
2024                                                 $sectionTitle,
2025                                                 $this->editRevId
2026                                         );
2027                                 } else {
2028                                         $content = $this->page->replaceSectionContent(
2029                                                 $this->section,
2030                                                 $textbox_content,
2031                                                 $sectionTitle,
2032                                                 $this->edittime
2033                                         );
2034                                 }
2035                         } else {
2036                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2037                                 $content = $this->page->replaceSectionContent(
2038                                         $this->section,
2039                                         $textbox_content,
2040                                         $sectionTitle
2041                                 );
2042                         }
2043
2044                         if ( is_null( $content ) ) {
2045                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2046                                 $this->isConflict = true;
2047                                 $content = $textbox_content; // do not try to merge here!
2048                         } elseif ( $this->isConflict ) {
2049                                 # Attempt merge
2050                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2051                                         // Successful merge! Maybe we should tell the user the good news?
2052                                         $this->isConflict = false;
2053                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2054                                 } else {
2055                                         $this->section = '';
2056                                         $this->textbox1 = ContentHandler::getContentText( $content );
2057                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2058                                 }
2059                         }
2060
2061                         if ( $this->isConflict ) {
2062                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2063                                 return $status;
2064                         }
2065
2066                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2067                                 return $status;
2068                         }
2069
2070                         if ( $this->section == 'new' ) {
2071                                 // Handle the user preference to force summaries here
2072                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2073                                         $this->missingSummary = true;
2074                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2075                                         $status->value = self::AS_SUMMARY_NEEDED;
2076                                         return $status;
2077                                 }
2078
2079                                 // Do not allow the user to post an empty comment
2080                                 if ( $this->textbox1 == '' ) {
2081                                         $this->missingComment = true;
2082                                         $status->fatal( 'missingcommenttext' );
2083                                         $status->value = self::AS_TEXTBOX_EMPTY;
2084                                         return $status;
2085                                 }
2086                         } elseif ( !$this->allowBlankSummary
2087                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2088                                 && !$content->isRedirect()
2089                                 && md5( $this->summary ) == $this->autoSumm
2090                         ) {
2091                                 $this->missingSummary = true;
2092                                 $status->fatal( 'missingsummary' );
2093                                 $status->value = self::AS_SUMMARY_NEEDED;
2094                                 return $status;
2095                         }
2096
2097                         # All's well
2098                         $sectionanchor = '';
2099                         if ( $this->section == 'new' ) {
2100                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2101                         } elseif ( $this->section != '' ) {
2102                                 # Try to get a section anchor from the section source, redirect
2103                                 # to edited section if header found.
2104                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2105                                 # for duplicate heading checking and maybe parsing.
2106                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2107                                 # We can't deal with anchors, includes, html etc in the header for now,
2108                                 # headline would need to be parsed to improve this.
2109                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2110                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2111                                 }
2112                         }
2113                         $result['sectionanchor'] = $sectionanchor;
2114
2115                         // Save errors may fall down to the edit form, but we've now
2116                         // merged the section into full text. Clear the section field
2117                         // so that later submission of conflict forms won't try to
2118                         // replace that into a duplicated mess.
2119                         $this->textbox1 = $this->toEditText( $content );
2120                         $this->section = '';
2121
2122                         $status->value = self::AS_SUCCESS_UPDATE;
2123                 }
2124
2125                 if ( !$this->allowSelfRedirect
2126                         && $content->isRedirect()
2127                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2128                 ) {
2129                         // If the page already redirects to itself, don't warn.
2130                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2131                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2132                                 $this->selfRedirect = true;
2133                                 $status->fatal( 'selfredirect' );
2134                                 $status->value = self::AS_SELF_REDIRECT;
2135                                 return $status;
2136                         }
2137                 }
2138
2139                 // Check for length errors again now that the section is merged in
2140                 $this->contentLength = strlen( $this->toEditText( $content ) );
2141                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2142                         $this->tooBig = true;
2143                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2144                         return $status;
2145                 }
2146
2147                 $flags = EDIT_AUTOSUMMARY |
2148                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2149                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2150                         ( $bot ? EDIT_FORCE_BOT : 0 );
2151
2152                 $doEditStatus = $this->page->doEditContent(
2153                         $content,
2154                         $this->summary,
2155                         $flags,
2156                         false,
2157                         $wgUser,
2158                         $content->getDefaultFormat(),
2159                         $this->changeTags,
2160                         $this->undidRev
2161                 );
2162
2163                 if ( !$doEditStatus->isOK() ) {
2164                         // Failure from doEdit()
2165                         // Show the edit conflict page for certain recognized errors from doEdit(),
2166                         // but don't show it for errors from extension hooks
2167                         $errors = $doEditStatus->getErrorsArray();
2168                         if ( in_array( $errors[0][0],
2169                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2170                         ) {
2171                                 $this->isConflict = true;
2172                                 // Destroys data doEdit() put in $status->value but who cares
2173                                 $doEditStatus->value = self::AS_END;
2174                         }
2175                         return $doEditStatus;
2176                 }
2177
2178                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2179                 if ( $result['nullEdit'] ) {
2180                         // We don't know if it was a null edit until now, so increment here
2181                         $wgUser->pingLimiter( 'linkpurge' );
2182                 }
2183                 $result['redirect'] = $content->isRedirect();
2184
2185                 $this->updateWatchlist();
2186
2187                 // If the content model changed, add a log entry
2188                 if ( $changingContentModel ) {
2189                         $this->addContentModelChangeLogEntry(
2190                                 $wgUser,
2191                                 $new ? false : $oldContentModel,
2192                                 $this->contentModel,
2193                                 $this->summary
2194                         );
2195                 }
2196
2197                 return $status;
2198         }
2199
2200         /**
2201          * @param User $user
2202          * @param string|false $oldModel false if the page is being newly created
2203          * @param string $newModel
2204          * @param string $reason
2205          */
2206         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2207                 $new = $oldModel === false;
2208                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2209                 $log->setPerformer( $user );
2210                 $log->setTarget( $this->mTitle );
2211                 $log->setComment( $reason );
2212                 $log->setParameters( [
2213                         '4::oldmodel' => $oldModel,
2214                         '5::newmodel' => $newModel
2215                 ] );
2216                 $logid = $log->insert();
2217                 $log->publish( $logid );
2218         }
2219
2220         /**
2221          * Register the change of watch status
2222          */
2223         protected function updateWatchlist() {
2224                 global $wgUser;
2225
2226                 if ( !$wgUser->isLoggedIn() ) {
2227                         return;
2228                 }
2229
2230                 $user = $wgUser;
2231                 $title = $this->mTitle;
2232                 $watch = $this->watchthis;
2233                 // Do this in its own transaction to reduce contention...
2234                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2235                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2236                                 return; // nothing to change
2237                         }
2238                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2239                 } );
2240         }
2241
2242         /**
2243          * Attempts to do 3-way merge of edit content with a base revision
2244          * and current content, in case of edit conflict, in whichever way appropriate
2245          * for the content type.
2246          *
2247          * @since 1.21
2248          *
2249          * @param Content $editContent
2250          *
2251          * @return bool
2252          */
2253         private function mergeChangesIntoContent( &$editContent ) {
2254                 $db = wfGetDB( DB_MASTER );
2255
2256                 // This is the revision the editor started from
2257                 $baseRevision = $this->getBaseRevision();
2258                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2259
2260                 if ( is_null( $baseContent ) ) {
2261                         return false;
2262                 }
2263
2264                 // The current state, we want to merge updates into it
2265                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2266                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2267
2268                 if ( is_null( $currentContent ) ) {
2269                         return false;
2270                 }
2271
2272                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2273
2274                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2275
2276                 if ( $result ) {
2277                         $editContent = $result;
2278                         // Update parentRevId to what we just merged.
2279                         $this->parentRevId = $currentRevision->getId();
2280                         return true;
2281                 }
2282
2283                 return false;
2284         }
2285
2286         /**
2287          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2288          *        one might think of X as the "base revision", which is NOT what this returns.
2289          * @return Revision Current version when the edit was started
2290          */
2291         public function getBaseRevision() {
2292                 if ( !$this->mBaseRevision ) {
2293                         $db = wfGetDB( DB_MASTER );
2294                         $this->mBaseRevision = $this->editRevId
2295                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2296                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2297                 }
2298                 return $this->mBaseRevision;
2299         }
2300
2301         /**
2302          * Check given input text against $wgSpamRegex, and return the text of the first match.
2303          *
2304          * @param string $text
2305          *
2306          * @return string|bool Matching string or false
2307          */
2308         public static function matchSpamRegex( $text ) {
2309                 global $wgSpamRegex;
2310                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2311                 $regexes = (array)$wgSpamRegex;
2312                 return self::matchSpamRegexInternal( $text, $regexes );
2313         }
2314
2315         /**
2316          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2317          *
2318          * @param string $text
2319          *
2320          * @return string|bool Matching string or false
2321          */
2322         public static function matchSummarySpamRegex( $text ) {
2323                 global $wgSummarySpamRegex;
2324                 $regexes = (array)$wgSummarySpamRegex;
2325                 return self::matchSpamRegexInternal( $text, $regexes );
2326         }
2327
2328         /**
2329          * @param string $text
2330          * @param array $regexes
2331          * @return bool|string
2332          */
2333         protected static function matchSpamRegexInternal( $text, $regexes ) {
2334                 foreach ( $regexes as $regex ) {
2335                         $matches = [];
2336                         if ( preg_match( $regex, $text, $matches ) ) {
2337                                 return $matches[0];
2338                         }
2339                 }
2340                 return false;
2341         }
2342
2343         public function setHeaders() {
2344                 global $wgOut, $wgUser, $wgAjaxEditStash;
2345
2346                 $wgOut->addModules( 'mediawiki.action.edit' );
2347                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2348
2349                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2350                         // The addition of default buttons is handled by getEditToolbar() which
2351                         // has its own dependency on this module. The call here ensures the module
2352                         // is loaded in time (it has position "top") for other modules to register
2353                         // buttons (e.g. extensions, gadgets, user scripts).
2354                         $wgOut->addModules( 'mediawiki.toolbar' );
2355                 }
2356
2357                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2358                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2359                 }
2360
2361                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2362                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2363                 }
2364
2365                 # Enabled article-related sidebar, toplinks, etc.
2366                 $wgOut->setArticleRelated( true );
2367
2368                 $contextTitle = $this->getContextTitle();
2369                 if ( $this->isConflict ) {
2370                         $msg = 'editconflict';
2371                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2372                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2373                 } else {
2374                         $msg = $contextTitle->exists()
2375                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2376                                         && $contextTitle->getDefaultMessageText() !== false
2377                                 )
2378                                 ? 'editing'
2379                                 : 'creating';
2380                 }
2381
2382                 # Use the title defined by DISPLAYTITLE magic word when present
2383                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2384                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2385                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2386                 if ( $displayTitle === false ) {
2387                         $displayTitle = $contextTitle->getPrefixedText();
2388                 }
2389                 $wgOut->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2390                 # Transmit the name of the message to JavaScript for live preview
2391                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2392                 $wgOut->addJsConfigVars( [
2393                         'wgEditMessage' => $msg,
2394                         'wgAjaxEditStash' => $wgAjaxEditStash,
2395                 ] );
2396         }
2397
2398         /**
2399          * Show all applicable editing introductions
2400          */
2401         protected function showIntro() {
2402                 global $wgOut, $wgUser;
2403                 if ( $this->suppressIntro ) {
2404                         return;
2405                 }
2406
2407                 $namespace = $this->mTitle->getNamespace();
2408
2409                 if ( $namespace == NS_MEDIAWIKI ) {
2410                         # Show a warning if editing an interface message
2411                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2412                         # If this is a default message (but not css or js),
2413                         # show a hint that it is translatable on translatewiki.net
2414                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2415                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2416                         ) {
2417                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2418                                 if ( $defaultMessageText !== false ) {
2419                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2420                                                 'translateinterface' );
2421                                 }
2422                         }
2423                 } elseif ( $namespace == NS_FILE ) {
2424                         # Show a hint to shared repo
2425                         $file = wfFindFile( $this->mTitle );
2426                         if ( $file && !$file->isLocal() ) {
2427                                 $descUrl = $file->getDescriptionUrl();
2428                                 # there must be a description url to show a hint to shared repo
2429                                 if ( $descUrl ) {
2430                                         if ( !$this->mTitle->exists() ) {
2431                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2432                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2433                                                 ] );
2434                                         } else {
2435                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2436                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2437                                                 ] );
2438                                         }
2439                                 }
2440                         }
2441                 }
2442
2443                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2444                 # Show log extract when the user is currently blocked
2445                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2446                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2447                         $user = User::newFromName( $username, false /* allow IP users */ );
2448                         $ip = User::isIP( $username );
2449                         $block = Block::newFromTarget( $user, $user );
2450                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2451                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2452                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2453                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2454                                 # Show log extract if the user is currently blocked
2455                                 LogEventsList::showLogExtract(
2456                                         $wgOut,
2457                                         'block',
2458                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2459                                         '',
2460                                         [
2461                                                 'lim' => 1,
2462                                                 'showIfEmpty' => false,
2463                                                 'msgKey' => [
2464                                                         'blocked-notice-logextract',
2465                                                         $user->getName() # Support GENDER in notice
2466                                                 ]
2467                                         ]
2468                                 );
2469                         }
2470                 }
2471                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2472                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2473                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2474                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2475                         ) );
2476                         if ( $wgUser->isLoggedIn() ) {
2477                                 $wgOut->wrapWikiMsg(
2478                                         // Suppress the external link icon, consider the help url an internal one
2479                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2480                                         [
2481                                                 'newarticletext',
2482                                                 $helpLink
2483                                         ]
2484                                 );
2485                         } else {
2486                                 $wgOut->wrapWikiMsg(
2487                                         // Suppress the external link icon, consider the help url an internal one
2488                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2489                                         [
2490                                                 'newarticletextanon',
2491                                                 $helpLink
2492                                         ]
2493                                 );
2494                         }
2495                 }
2496                 # Give a notice if the user is editing a deleted/moved page...
2497                 if ( !$this->mTitle->exists() ) {
2498                         $dbr = wfGetDB( DB_REPLICA );
2499
2500                         LogEventsList::showLogExtract( $wgOut, [ 'delete', 'move' ], $this->mTitle,
2501                                 '',
2502                                 [
2503                                         'lim' => 10,
2504                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2505                                         'showIfEmpty' => false,
2506                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2507                                 ]
2508                         );
2509                 }
2510         }
2511
2512         /**
2513          * Attempt to show a custom editing introduction, if supplied
2514          *
2515          * @return bool
2516          */
2517         protected function showCustomIntro() {
2518                 if ( $this->editintro ) {
2519                         $title = Title::newFromText( $this->editintro );
2520                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2521                                 global $wgOut;
2522                                 // Added using template syntax, to take <noinclude>'s into account.
2523                                 $wgOut->addWikiTextTitleTidy(
2524                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2525                                         $this->mTitle
2526                                 );
2527                                 return true;
2528                         }
2529                 }
2530                 return false;
2531         }
2532
2533         /**
2534          * Gets an editable textual representation of $content.
2535          * The textual representation can be turned by into a Content object by the
2536          * toEditContent() method.
2537          *
2538          * If $content is null or false or a string, $content is returned unchanged.
2539          *
2540          * If the given Content object is not of a type that can be edited using
2541          * the text base EditPage, an exception will be raised. Set
2542          * $this->allowNonTextContent to true to allow editing of non-textual
2543          * content.
2544          *
2545          * @param Content|null|bool|string $content
2546          * @return string The editable text form of the content.
2547          *
2548          * @throws MWException If $content is not an instance of TextContent and
2549          *   $this->allowNonTextContent is not true.
2550          */
2551         protected function toEditText( $content ) {
2552                 if ( $content === null || $content === false || is_string( $content ) ) {
2553                         return $content;
2554                 }
2555
2556                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2557                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2558                 }
2559
2560                 return $content->serialize( $this->contentFormat );
2561         }
2562
2563         /**
2564          * Turns the given text into a Content object by unserializing it.
2565          *
2566          * If the resulting Content object is not of a type that can be edited using
2567          * the text base EditPage, an exception will be raised. Set
2568          * $this->allowNonTextContent to true to allow editing of non-textual
2569          * content.
2570          *
2571          * @param string|null|bool $text Text to unserialize
2572          * @return Content|bool|null The content object created from $text. If $text was false
2573          *   or null, false resp. null will be  returned instead.
2574          *
2575          * @throws MWException If unserializing the text results in a Content
2576          *   object that is not an instance of TextContent and
2577          *   $this->allowNonTextContent is not true.
2578          */
2579         protected function toEditContent( $text ) {
2580                 if ( $text === false || $text === null ) {
2581                         return $text;
2582                 }
2583
2584                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2585                         $this->contentModel, $this->contentFormat );
2586
2587                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2588                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2589                 }
2590
2591                 return $content;
2592         }
2593
2594         /**
2595          * Send the edit form and related headers to $wgOut
2596          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2597          *     during form output near the top, for captchas and the like.
2598          *
2599          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2600          * use the EditPage::showEditForm:fields hook instead.
2601          */
2602         public function showEditForm( $formCallback = null ) {
2603                 global $wgOut, $wgUser;
2604
2605                 # need to parse the preview early so that we know which templates are used,
2606                 # otherwise users with "show preview after edit box" will get a blank list
2607                 # we parse this near the beginning so that setHeaders can do the title
2608                 # setting work instead of leaving it in getPreviewText
2609                 $previewOutput = '';
2610                 if ( $this->formtype == 'preview' ) {
2611                         $previewOutput = $this->getPreviewText();
2612                 }
2613
2614                 // Avoid PHP 7.1 warning of passing $this by reference
2615                 $editPage = $this;
2616                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$wgOut ] );
2617
2618                 $this->setHeaders();
2619
2620                 $this->addTalkPageText();
2621                 $this->addEditNotices();
2622
2623                 if ( !$this->isConflict &&
2624                         $this->section != '' &&
2625                         !$this->isSectionEditSupported() ) {
2626                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2627                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2628                         // Someone is welcome to try refactoring though
2629                         $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2630                         return;
2631                 }
2632
2633                 $this->showHeader();
2634
2635                 $wgOut->addHTML( $this->editFormPageTop );
2636
2637                 if ( $wgUser->getOption( 'previewontop' ) ) {
2638                         $this->displayPreviewArea( $previewOutput, true );
2639                 }
2640
2641                 $wgOut->addHTML( $this->editFormTextTop );
2642
2643                 $showToolbar = true;
2644                 if ( $this->wasDeletedSinceLastEdit() ) {
2645                         if ( $this->formtype == 'save' ) {
2646                                 // Hide the toolbar and edit area, user can click preview to get it back
2647                                 // Add an confirmation checkbox and explanation.
2648                                 $showToolbar = false;
2649                         } else {
2650                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2651                                         'deletedwhileediting' );
2652                         }
2653                 }
2654
2655                 // @todo add EditForm plugin interface and use it here!
2656                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2657                 $wgOut->addHTML( Html::openElement(
2658                         'form',
2659                         [
2660                                 'class' => 'mw-editform',
2661                                 'id' => self::EDITFORM_ID,
2662                                 'name' => self::EDITFORM_ID,
2663                                 'method' => 'post',
2664                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2665                                 'enctype' => 'multipart/form-data'
2666                         ]
2667                 ) );
2668
2669                 if ( is_callable( $formCallback ) ) {
2670                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2671                         call_user_func_array( $formCallback, [ &$wgOut ] );
2672                 }
2673
2674                 // Add an empty field to trip up spambots
2675                 $wgOut->addHTML(
2676                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2677                         . Html::rawElement(
2678                                 'label',
2679                                 [ 'for' => 'wpAntispam' ],
2680                                 $this->context->msg( 'simpleantispam-label' )->parse()
2681                         )
2682                         . Xml::element(
2683                                 'input',
2684                                 [
2685                                         'type' => 'text',
2686                                         'name' => 'wpAntispam',
2687                                         'id' => 'wpAntispam',
2688                                         'value' => ''
2689                                 ]
2690                         )
2691                         . Xml::closeElement( 'div' )
2692                 );
2693
2694                 // Avoid PHP 7.1 warning of passing $this by reference
2695                 $editPage = $this;
2696                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$wgOut ] );
2697
2698                 // Put these up at the top to ensure they aren't lost on early form submission
2699                 $this->showFormBeforeText();
2700
2701                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2702                         $username = $this->lastDelete->user_name;
2703                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2704
2705                         // It is better to not parse the comment at all than to have templates expanded in the middle
2706                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2707                         $key = $comment === ''
2708                                 ? 'confirmrecreate-noreason'
2709                                 : 'confirmrecreate';
2710                         $wgOut->addHTML(
2711                                 '<div class="mw-confirm-recreate">' .
2712                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2713                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2714                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2715                                 ) .
2716                                 '</div>'
2717                         );
2718                 }
2719
2720                 # When the summary is hidden, also hide them on preview/show changes
2721                 if ( $this->nosummary ) {
2722                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2723                 }
2724
2725                 # If a blank edit summary was previously provided, and the appropriate
2726                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2727                 # user being bounced back more than once in the event that a summary
2728                 # is not required.
2729                 # ####
2730                 # For a bit more sophisticated detection of blank summaries, hash the
2731                 # automatic one and pass that in the hidden field wpAutoSummary.
2732                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2733                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2734                 }
2735
2736                 if ( $this->undidRev ) {
2737                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2738                 }
2739
2740                 if ( $this->selfRedirect ) {
2741                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2742                 }
2743
2744                 if ( $this->hasPresetSummary ) {
2745                         // If a summary has been preset using &summary= we don't want to prompt for
2746                         // a different summary. Only prompt for a summary if the summary is blanked.
2747                         // (T19416)
2748                         $this->autoSumm = md5( '' );
2749                 }
2750
2751                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2752                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2753
2754                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2755                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2756
2757                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2758                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2759
2760                 $wgOut->enableOOUI();
2761
2762                 if ( $this->section == 'new' ) {
2763                         $this->showSummaryInput( true, $this->summary );
2764                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2765                 }
2766
2767                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2768
2769                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2770                         $wgOut->addHTML( self::getEditToolbar( $this->mTitle ) );
2771                 }
2772
2773                 if ( $this->blankArticle ) {
2774                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2775                 }
2776
2777                 if ( $this->isConflict ) {
2778                         // In an edit conflict bypass the overridable content form method
2779                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2780                         // resolved between page source edits and custom ui edits using the
2781                         // custom edit ui.
2782                         $this->textbox2 = $this->textbox1;
2783
2784                         $content = $this->getCurrentContent();
2785                         $this->textbox1 = $this->toEditText( $content );
2786
2787                         $this->showTextbox1();
2788                 } else {
2789                         $this->showContentForm();
2790                 }
2791
2792                 $wgOut->addHTML( $this->editFormTextAfterContent );
2793
2794                 $this->showStandardInputs();
2795
2796                 $this->showFormAfterText();
2797
2798                 $this->showTosSummary();
2799
2800                 $this->showEditTools();
2801
2802                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2803
2804                 $wgOut->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2805
2806                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2807                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2808
2809                 $wgOut->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2810                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2811
2812                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2813
2814                 if ( $this->isConflict ) {
2815                         try {
2816                                 $this->showConflict();
2817                         } catch ( MWContentSerializationException $ex ) {
2818                                 // this can't really happen, but be nice if it does.
2819                                 $msg = $this->context->msg(
2820                                         'content-failed-to-parse',
2821                                         $this->contentModel,
2822                                         $this->contentFormat,
2823                                         $ex->getMessage()
2824                                 );
2825                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2826                         }
2827                 }
2828
2829                 // Set a hidden field so JS knows what edit form mode we are in
2830                 if ( $this->isConflict ) {
2831                         $mode = 'conflict';
2832                 } elseif ( $this->preview ) {
2833                         $mode = 'preview';
2834                 } elseif ( $this->diff ) {
2835                         $mode = 'diff';
2836                 } else {
2837                         $mode = 'text';
2838                 }
2839                 $wgOut->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2840
2841                 // Marker for detecting truncated form data.  This must be the last
2842                 // parameter sent in order to be of use, so do not move me.
2843                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2844                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2845
2846                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2847                         $this->displayPreviewArea( $previewOutput, false );
2848                 }
2849         }
2850
2851         /**
2852          * Wrapper around TemplatesOnThisPageFormatter to make
2853          * a "templates on this page" list.
2854          *
2855          * @param Title[] $templates
2856          * @return string HTML
2857          */
2858         public function makeTemplatesOnThisPageList( array $templates ) {
2859                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2860                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2861                 );
2862
2863                 // preview if preview, else section if section, else false
2864                 $type = false;
2865                 if ( $this->preview ) {
2866                         $type = 'preview';
2867                 } elseif ( $this->section != '' ) {
2868                         $type = 'section';
2869                 }
2870
2871                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2872                         $templateListFormatter->format( $templates, $type )
2873                 );
2874         }
2875
2876         /**
2877          * Extract the section title from current section text, if any.
2878          *
2879          * @param string $text
2880          * @return string|bool String or false
2881          */
2882         public static function extractSectionTitle( $text ) {
2883                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2884                 if ( !empty( $matches[2] ) ) {
2885                         global $wgParser;
2886                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2887                 } else {
2888                         return false;
2889                 }
2890         }
2891
2892         protected function showHeader() {
2893                 global $wgOut, $wgUser;
2894                 global $wgAllowUserCss, $wgAllowUserJs;
2895
2896                 if ( $this->isConflict ) {
2897                         $this->addExplainConflictHeader( $wgOut );
2898                         $this->editRevId = $this->page->getLatest();
2899                 } else {
2900                         if ( $this->section != '' && $this->section != 'new' ) {
2901                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2902                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2903                                         if ( $sectionTitle !== false ) {
2904                                                 $this->summary = "/* $sectionTitle */ ";
2905                                         }
2906                                 }
2907                         }
2908
2909                         $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
2910
2911                         if ( $this->missingComment ) {
2912                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2913                         }
2914
2915                         if ( $this->missingSummary && $this->section != 'new' ) {
2916                                 $wgOut->wrapWikiMsg(
2917                                         "<div id='mw-missingsummary'>\n$1\n</div>",
2918                                         [ 'missingsummary', $buttonLabel ]
2919                                 );
2920                         }
2921
2922                         if ( $this->missingSummary && $this->section == 'new' ) {
2923                                 $wgOut->wrapWikiMsg(
2924                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
2925                                         [ 'missingcommentheader', $buttonLabel ]
2926                                 );
2927                         }
2928
2929                         if ( $this->blankArticle ) {
2930                                 $wgOut->wrapWikiMsg(
2931                                         "<div id='mw-blankarticle'>\n$1\n</div>",
2932                                         [ 'blankarticle', $buttonLabel ]
2933                                 );
2934                         }
2935
2936                         if ( $this->selfRedirect ) {
2937                                 $wgOut->wrapWikiMsg(
2938                                         "<div id='mw-selfredirect'>\n$1\n</div>",
2939                                         [ 'selfredirect', $buttonLabel ]
2940                                 );
2941                         }
2942
2943                         if ( $this->hookError !== '' ) {
2944                                 $wgOut->addWikiText( $this->hookError );
2945                         }
2946
2947                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2948                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2949                         }
2950
2951                         if ( $this->section != 'new' ) {
2952                                 $revision = $this->mArticle->getRevisionFetched();
2953                                 if ( $revision ) {
2954                                         // Let sysop know that this will make private content public if saved
2955
2956                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2957                                                 $wgOut->wrapWikiMsg(
2958                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2959                                                         'rev-deleted-text-permission'
2960                                                 );
2961                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2962                                                 $wgOut->wrapWikiMsg(
2963                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2964                                                         'rev-deleted-text-view'
2965                                                 );
2966                                         }
2967
2968                                         if ( !$revision->isCurrent() ) {
2969                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2970                                                 $wgOut->addWikiMsg( 'editingold' );
2971                                                 $this->isOldRev = true;
2972                                         }
2973                                 } elseif ( $this->mTitle->exists() ) {
2974                                         // Something went wrong
2975
2976                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2977                                                 [ 'missing-revision', $this->oldid ] );
2978                                 }
2979                         }
2980                 }
2981
2982                 if ( wfReadOnly() ) {
2983                         $wgOut->wrapWikiMsg(
2984                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2985                                 [ 'readonlywarning', wfReadOnlyReason() ]
2986                         );
2987                 } elseif ( $wgUser->isAnon() ) {
2988                         if ( $this->formtype != 'preview' ) {
2989                                 $wgOut->wrapWikiMsg(
2990                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
2991                                         [ 'anoneditwarning',
2992                                                 // Log-in link
2993                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
2994                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2995                                                 ] ),
2996                                                 // Sign-up link
2997                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
2998                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
2999                                                 ] )
3000                                         ]
3001                                 );
3002                         } else {
3003                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3004                                         'anonpreviewwarning'
3005                                 );
3006                         }
3007                 } else {
3008                         if ( $this->isCssJsSubpage ) {
3009                                 # Check the skin exists
3010                                 if ( $this->isWrongCaseCssJsPage ) {
3011                                         $wgOut->wrapWikiMsg(
3012                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3013                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3014                                         );
3015                                 }
3016                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
3017                                         $wgOut->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3018                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3019                                         );
3020                                         if ( $this->formtype !== 'preview' ) {
3021                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3022                                                         $wgOut->wrapWikiMsg(
3023                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3024                                                                 [ 'usercssyoucanpreview' ]
3025                                                         );
3026                                                 }
3027
3028                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3029                                                         $wgOut->wrapWikiMsg(
3030                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3031                                                                 [ 'userjsyoucanpreview' ]
3032                                                         );
3033                                                 }
3034                                         }
3035                                 }
3036                         }
3037                 }
3038
3039                 $this->addPageProtectionWarningHeaders();
3040
3041                 $this->addLongPageWarningHeader();
3042
3043                 # Add header copyright warning
3044                 $this->showHeaderCopyrightWarning();
3045         }
3046
3047         /**
3048          * Helper function for summary input functions, which returns the neccessary
3049          * attributes for the input.
3050          *
3051          * @param array|null $inputAttrs Array of attrs to use on the input
3052          * @return array
3053          */
3054         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3055                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3056                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3057                         'id' => 'wpSummary',
3058                         'name' => 'wpSummary',
3059                         'maxlength' => '200',
3060                         'tabindex' => 1,
3061                         'size' => 60,
3062                         'spellcheck' => 'true',
3063                 ];
3064         }
3065
3066         /**
3067          * Builds a standard summary input with a label.
3068          *
3069          * @param string $summary The value of the summary input
3070          * @param string $labelText The html to place inside the label
3071          * @param array $inputAttrs Array of attrs to use on the input
3072          *
3073          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3074          */
3075         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3076                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3077                         $this->getSummaryInputAttributes( $inputAttrs )
3078                 );
3079                 $inputAttrs += [
3080                         'title' => Linker::titleAttrib( 'summary' ),
3081                         'accessKey' => Linker::accesskey( 'summary' ),
3082                 ];
3083
3084                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3085                 $inputAttrs['inputId'] = $inputAttrs['id'];
3086                 $inputAttrs['id'] = 'wpSummaryWidget';
3087
3088                 return new OOUI\FieldLayout(
3089                         new OOUI\TextInputWidget( [
3090                                 'value' => $summary,
3091                                 'infusable' => true,
3092                         ] + $inputAttrs ),
3093                         [
3094                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3095                                 'align' => 'top',
3096                                 'id' => 'wpSummaryLabel',
3097                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3098                         ]
3099                 );
3100         }
3101
3102         /**
3103          * @param bool $isSubjectPreview True if this is the section subject/title
3104          *   up top, or false if this is the comment summary
3105          *   down below the textarea
3106          * @param string $summary The text of the summary to display
3107          */
3108         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3109                 global $wgOut;
3110
3111                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3112                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3113                 if ( $isSubjectPreview ) {
3114                         if ( $this->nosummary ) {
3115                                 return;
3116                         }
3117                 } else {
3118                         if ( !$this->mShowSummaryField ) {
3119                                 return;
3120                         }
3121                 }
3122
3123                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3124                 $wgOut->addHTML( $this->getSummaryInputOOUI(
3125                                 $summary,
3126                                 $labelText,
3127                                 [ 'class' => $summaryClass ]
3128                         ) );
3129         }
3130
3131         /**
3132          * @param bool $isSubjectPreview True if this is the section subject/title
3133          *   up top, or false if this is the comment summary
3134          *   down below the textarea
3135          * @param string $summary The text of the summary to display
3136          * @return string
3137          */
3138         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3139                 // avoid spaces in preview, gets always trimmed on save
3140                 $summary = trim( $summary );
3141                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3142                         return "";
3143                 }
3144
3145                 global $wgParser;
3146
3147                 if ( $isSubjectPreview ) {
3148                         $summary = $this->context->msg( 'newsectionsummary' )
3149                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3150                                 ->inContentLanguage()->text();
3151                 }
3152
3153                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3154
3155                 $summary = $this->context->msg( $message )->parse()
3156                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3157                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3158         }
3159
3160         protected function showFormBeforeText() {
3161                 global $wgOut;
3162
3163                 $wgOut->addHTML( Html::hidden( 'wpSection', htmlspecialchars( $this->section ) ) );
3164                 $wgOut->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3165                 $wgOut->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3166                 $wgOut->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3167                 $wgOut->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3168
3169                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3170                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3171                 }
3172         }
3173
3174         protected function showFormAfterText() {
3175                 global $wgOut, $wgUser;
3176                 /**
3177                  * To make it harder for someone to slip a user a page
3178                  * which submits an edit form to the wiki without their
3179                  * knowledge, a random token is associated with the login
3180                  * session. If it's not passed back with the submission,
3181                  * we won't save the page, or render user JavaScript and
3182                  * CSS previews.
3183                  *
3184                  * For anon editors, who may not have a session, we just
3185                  * include the constant suffix to prevent editing from
3186                  * broken text-mangling proxies.
3187                  */
3188                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3189         }
3190
3191         /**
3192          * Subpage overridable method for printing the form for page content editing
3193          * By default this simply outputs wpTextbox1
3194          * Subclasses can override this to provide a custom UI for editing;
3195          * be it a form, or simply wpTextbox1 with a modified content that will be
3196          * reverse modified when extracted from the post data.
3197          * Note that this is basically the inverse for importContentFormData
3198          */
3199         protected function showContentForm() {
3200                 $this->showTextbox1();
3201         }
3202
3203         /**
3204          * Method to output wpTextbox1
3205          * The $textoverride method can be used by subclasses overriding showContentForm
3206          * to pass back to this method.
3207          *
3208          * @param array $customAttribs Array of html attributes to use in the textarea
3209          * @param string $textoverride Optional text to override $this->textarea1 with
3210          */
3211         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3212                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3213                         $attribs = [ 'style' => 'display:none;' ];
3214                 } else {
3215                         $classes = []; // Textarea CSS
3216                         if ( $this->mTitle->isProtected( 'edit' ) &&
3217                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3218                         ) {
3219                                 # Is the title semi-protected?
3220                                 if ( $this->mTitle->isSemiProtected() ) {
3221                                         $classes[] = 'mw-textarea-sprotected';
3222                                 } else {
3223                                         # Then it must be protected based on static groups (regular)
3224                                         $classes[] = 'mw-textarea-protected';
3225                                 }
3226                                 # Is the title cascade-protected?
3227                                 if ( $this->mTitle->isCascadeProtected() ) {
3228                                         $classes[] = 'mw-textarea-cprotected';
3229                                 }
3230                         }
3231                         # Is an old revision being edited?
3232                         if ( $this->isOldRev ) {
3233                                 $classes[] = 'mw-textarea-oldrev';
3234                         }
3235
3236                         $attribs = [ 'tabindex' => 1 ];
3237
3238                         if ( is_array( $customAttribs ) ) {
3239                                 $attribs += $customAttribs;
3240                         }
3241
3242                         if ( count( $classes ) ) {
3243                                 if ( isset( $attribs['class'] ) ) {
3244                                         $classes[] = $attribs['class'];
3245                                 }
3246                                 $attribs['class'] = implode( ' ', $classes );
3247                         }
3248                 }
3249
3250                 $this->showTextbox(
3251                         $textoverride !== null ? $textoverride : $this->textbox1,
3252                         'wpTextbox1',
3253                         $attribs
3254                 );
3255         }
3256
3257         protected function showTextbox2() {
3258                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3259         }
3260
3261         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3262                 global $wgOut, $wgUser;
3263
3264                 $wikitext = $this->safeUnicodeOutput( $text );
3265                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3266
3267                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $wgUser );
3268
3269                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3270         }
3271
3272         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3273                 global $wgOut;
3274                 $classes = [];
3275                 if ( $isOnTop ) {
3276                         $classes[] = 'ontop';
3277                 }
3278
3279                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3280
3281                 if ( $this->formtype != 'preview' ) {
3282                         $attribs['style'] = 'display: none;';
3283                 }
3284
3285                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3286
3287                 if ( $this->formtype == 'preview' ) {
3288                         $this->showPreview( $previewOutput );
3289                 } else {
3290                         // Empty content container for LivePreview
3291                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3292                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3293                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3294                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3295                 }
3296
3297                 $wgOut->addHTML( '</div>' );
3298
3299                 if ( $this->formtype == 'diff' ) {
3300                         try {
3301                                 $this->showDiff();
3302                         } catch ( MWContentSerializationException $ex ) {
3303                                 $msg = $this->context->msg(
3304                                         'content-failed-to-parse',
3305                                         $this->contentModel,
3306                                         $this->contentFormat,
3307                                         $ex->getMessage()
3308                                 );
3309                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3310                         }
3311                 }
3312         }
3313
3314         /**
3315          * Append preview output to $wgOut.
3316          * Includes category rendering if this is a category page.
3317          *
3318          * @param string $text The HTML to be output for the preview.
3319          */
3320         protected function showPreview( $text ) {
3321                 global $wgOut;
3322                 if ( $this->mArticle instanceof CategoryPage ) {
3323                         $this->mArticle->openShowCategory();
3324                 }
3325                 # This hook seems slightly odd here, but makes things more
3326                 # consistent for extensions.
3327                 Hooks::run( 'OutputPageBeforeHTML', [ &$wgOut, &$text ] );
3328                 $wgOut->addHTML( $text );
3329                 if ( $this->mArticle instanceof CategoryPage ) {
3330                         $this->mArticle->closeShowCategory();
3331                 }
3332         }
3333
3334         /**
3335          * Get a diff between the current contents of the edit box and the
3336          * version of the page we're editing from.
3337          *
3338          * If this is a section edit, we'll replace the section as for final
3339          * save and then make a comparison.
3340          */
3341         public function showDiff() {
3342                 global $wgUser, $wgContLang, $wgOut;
3343
3344                 $oldtitlemsg = 'currentrev';
3345                 # if message does not exist, show diff against the preloaded default
3346                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3347                         $oldtext = $this->mTitle->getDefaultMessageText();
3348                         if ( $oldtext !== false ) {
3349                                 $oldtitlemsg = 'defaultmessagetext';
3350                                 $oldContent = $this->toEditContent( $oldtext );
3351                         } else {
3352                                 $oldContent = null;
3353                         }
3354                 } else {
3355                         $oldContent = $this->getCurrentContent();
3356                 }
3357
3358                 $textboxContent = $this->toEditContent( $this->textbox1 );
3359                 if ( $this->editRevId !== null ) {
3360                         $newContent = $this->page->replaceSectionAtRev(
3361                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3362                         );
3363                 } else {
3364                         $newContent = $this->page->replaceSectionContent(
3365                                 $this->section, $textboxContent, $this->summary, $this->edittime
3366                         );
3367                 }
3368
3369                 if ( $newContent ) {
3370                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3371
3372                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3373                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3374                 }
3375
3376                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3377                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3378                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3379
3380                         if ( !$oldContent ) {
3381                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3382                         }
3383
3384                         if ( !$newContent ) {
3385                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3386                         }
3387
3388                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3389                         $de->setContent( $oldContent, $newContent );
3390
3391                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3392                         $de->showDiffStyle();
3393                 } else {
3394                         $difftext = '';
3395                 }
3396
3397                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3398         }
3399
3400         /**
3401          * Show the header copyright warning.
3402          */
3403         protected function showHeaderCopyrightWarning() {
3404                 $msg = 'editpage-head-copy-warn';
3405                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3406                         global $wgOut;
3407                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3408                                 'editpage-head-copy-warn' );
3409                 }
3410         }
3411
3412         /**
3413          * Give a chance for site and per-namespace customizations of
3414          * terms of service summary link that might exist separately
3415          * from the copyright notice.
3416          *
3417          * This will display between the save button and the edit tools,
3418          * so should remain short!
3419          */
3420         protected function showTosSummary() {
3421                 $msg = 'editpage-tos-summary';
3422                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3423                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3424                         global $wgOut;
3425                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3426                         $wgOut->addWikiMsg( $msg );
3427                         $wgOut->addHTML( '</div>' );
3428                 }
3429         }
3430
3431         /**
3432          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3433          * characters not present on most keyboards for copying/pasting.
3434          */
3435         protected function showEditTools() {
3436                 global $wgOut;
3437                 $wgOut->addHTML( '<div class="mw-editTools">' .
3438                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3439                         '</div>' );
3440         }
3441
3442         /**
3443          * Get the copyright warning
3444          *
3445          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3446          * @return string
3447          */
3448         protected function getCopywarn() {
3449                 return self::getCopyrightWarning( $this->mTitle );
3450         }
3451
3452         /**
3453          * Get the copyright warning, by default returns wikitext
3454          *
3455          * @param Title $title
3456          * @param string $format Output format, valid values are any function of a Message object
3457          * @param Language|string|null $langcode Language code or Language object.
3458          * @return string
3459          */
3460         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3461                 global $wgRightsText;
3462                 if ( $wgRightsText ) {
3463                         $copywarnMsg = [ 'copyrightwarning',
3464                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3465                                 $wgRightsText ];
3466                 } else {
3467                         $copywarnMsg = [ 'copyrightwarning2',
3468                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3469                 }
3470                 // Allow for site and per-namespace customization of contribution/copyright notice.
3471                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3472
3473                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3474                 if ( $langcode ) {
3475                         $msg->inLanguage( $langcode );
3476                 }
3477                 return "<div id=\"editpage-copywarn\">\n" .
3478                         $msg->$format() . "\n</div>";
3479         }
3480
3481         /**
3482          * Get the Limit report for page previews
3483          *
3484          * @since 1.22
3485          * @param ParserOutput $output ParserOutput object from the parse
3486          * @return string HTML
3487          */
3488         public static function getPreviewLimitReport( $output ) {
3489                 if ( !$output || !$output->getLimitReportData() ) {
3490                         return '';
3491                 }
3492
3493                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3494                         wfMessage( 'limitreport-title' )->parseAsBlock()
3495                 );
3496
3497                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3498                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3499
3500                 $limitReport .= Html::openElement( 'table', [
3501                         'class' => 'preview-limit-report wikitable'
3502                 ] ) .
3503                         Html::openElement( 'tbody' );
3504
3505                 foreach ( $output->getLimitReportData() as $key => $value ) {
3506                         if ( Hooks::run( 'ParserLimitReportFormat',
3507                                 [ $key, &$value, &$limitReport, true, true ]
3508                         ) ) {
3509                                 $keyMsg = wfMessage( $key );
3510                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3511                                 if ( !$valueMsg->exists() ) {
3512                                         $valueMsg = new RawMessage( '$1' );
3513                                 }
3514                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3515                                         $limitReport .= Html::openElement( 'tr' ) .
3516                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3517                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3518                                                 Html::closeElement( 'tr' );
3519                                 }
3520                         }
3521                 }
3522
3523                 $limitReport .= Html::closeElement( 'tbody' ) .
3524                         Html::closeElement( 'table' ) .
3525                         Html::closeElement( 'div' );
3526
3527                 return $limitReport;
3528         }
3529
3530         protected function showStandardInputs( &$tabindex = 2 ) {
3531                 global $wgOut;
3532                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3533
3534                 if ( $this->section != 'new' ) {
3535                         $this->showSummaryInput( false, $this->summary );
3536                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3537                 }
3538
3539                 $checkboxes = $this->getCheckboxesOOUI(
3540                         $tabindex,
3541                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3542                 );
3543                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3544
3545                 $wgOut->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3546
3547                 // Show copyright warning.
3548                 $wgOut->addWikiText( $this->getCopywarn() );
3549                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3550
3551                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3552                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3553
3554                 $cancel = $this->getCancelLink();
3555                 if ( $cancel !== '' ) {
3556                         $cancel .= Html::element( 'span',
3557                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3558                                 $this->context->msg( 'pipe-separator' )->text() );
3559                 }
3560
3561                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3562                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3563                 $edithelp =
3564                         Html::linkButton(
3565                                 $this->context->msg( 'edithelp' )->text(),
3566                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3567                                 [ 'mw-ui-quiet' ]
3568                         ) .
3569                         $this->context->msg( 'word-separator' )->escaped() .
3570                         $this->context->msg( 'newwindow' )->parse();
3571
3572                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3573                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3574                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3575
3576                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $wgOut, &$tabindex ] );
3577
3578                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3579         }
3580
3581         /**
3582          * Show an edit conflict. textbox1 is already shown in showEditForm().
3583          * If you want to use another entry point to this function, be careful.
3584          */
3585         protected function showConflict() {
3586                 global $wgOut;
3587
3588                 // Avoid PHP 7.1 warning of passing $this by reference
3589                 $editPage = $this;
3590                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$wgOut ] ) ) {
3591                         $this->incrementConflictStats();
3592
3593                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3594
3595                         $content1 = $this->toEditContent( $this->textbox1 );
3596                         $content2 = $this->toEditContent( $this->textbox2 );
3597
3598                         $handler = ContentHandler::getForModelID( $this->contentModel );
3599                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3600                         $de->setContent( $content2, $content1 );
3601                         $de->showDiff(
3602                                 $this->context->msg( 'yourtext' )->parse(),
3603                                 $this->context->msg( 'storedversion' )->text()
3604                         );
3605
3606                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3607                         $this->showTextbox2();
3608                 }
3609         }
3610
3611         protected function incrementConflictStats() {
3612                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3613                 $stats->increment( 'edit.failures.conflict' );
3614                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3615                 if (
3616                         $this->mTitle->getNamespace() >= NS_MAIN &&
3617                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3618                 ) {
3619                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3620                 }
3621         }
3622
3623         /**
3624          * @return string
3625          */
3626         public function getCancelLink() {
3627                 $cancelParams = [];
3628                 if ( !$this->isConflict && $this->oldid > 0 ) {
3629                         $cancelParams['oldid'] = $this->oldid;
3630                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3631                         $cancelParams['redirect'] = 'no';
3632                 }
3633
3634                 return new OOUI\ButtonWidget( [
3635                         'id' => 'mw-editform-cancel',
3636                         'href' => $this->getContextTitle()->getLinkUrl( $cancelParams ),
3637                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3638                         'framed' => false,
3639                         'infusable' => true,
3640                         'flags' => 'destructive',
3641                 ] );
3642         }
3643
3644         /**
3645          * Returns the URL to use in the form's action attribute.
3646          * This is used by EditPage subclasses when simply customizing the action
3647          * variable in the constructor is not enough. This can be used when the
3648          * EditPage lives inside of a Special page rather than a custom page action.
3649          *
3650          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3651          * @return string
3652          */
3653         protected function getActionURL( Title $title ) {
3654                 return $title->getLocalURL( [ 'action' => $this->action ] );
3655         }
3656
3657         /**
3658          * Check if a page was deleted while the user was editing it, before submit.
3659          * Note that we rely on the logging table, which hasn't been always there,
3660          * but that doesn't matter, because this only applies to brand new
3661          * deletes.
3662          * @return bool
3663          */
3664         protected function wasDeletedSinceLastEdit() {
3665                 if ( $this->deletedSinceEdit !== null ) {
3666                         return $this->deletedSinceEdit;
3667                 }
3668
3669                 $this->deletedSinceEdit = false;
3670
3671                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3672                         $this->lastDelete = $this->getLastDelete();
3673                         if ( $this->lastDelete ) {
3674                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3675                                 if ( $deleteTime > $this->starttime ) {
3676                                         $this->deletedSinceEdit = true;
3677                                 }
3678                         }
3679                 }
3680
3681                 return $this->deletedSinceEdit;
3682         }
3683
3684         /**
3685          * @return bool|stdClass
3686          */
3687         protected function getLastDelete() {
3688                 $dbr = wfGetDB( DB_REPLICA );
3689                 $commentQuery = CommentStore::newKey( 'log_comment' )->getJoin();
3690                 $data = $dbr->selectRow(
3691                         [ 'logging', 'user' ] + $commentQuery['tables'],
3692                         [
3693                                 'log_type',
3694                                 'log_action',
3695                                 'log_timestamp',
3696                                 'log_user',
3697                                 'log_namespace',
3698                                 'log_title',
3699                                 'log_params',
3700                                 'log_deleted',
3701                                 'user_name'
3702                         ] + $commentQuery['fields'], [
3703                                 'log_namespace' => $this->mTitle->getNamespace(),
3704                                 'log_title' => $this->mTitle->getDBkey(),
3705                                 'log_type' => 'delete',
3706                                 'log_action' => 'delete',
3707                                 'user_id=log_user'
3708                         ],
3709                         __METHOD__,
3710                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3711                         [
3712                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3713                         ] + $commentQuery['joins']
3714                 );
3715                 // Quick paranoid permission checks...
3716                 if ( is_object( $data ) ) {
3717                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3718                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3719                         }
3720
3721                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3722                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3723                                 $data->log_comment_data = null;
3724                         }
3725                 }
3726
3727                 return $data;
3728         }
3729
3730         /**
3731          * Get the rendered text for previewing.
3732          * @throws MWException
3733          * @return string
3734          */
3735         public function getPreviewText() {
3736                 global $wgOut, $wgRawHtml, $wgLang;
3737                 global $wgAllowUserCss, $wgAllowUserJs;
3738
3739                 if ( $wgRawHtml && !$this->mTokenOk ) {
3740                         // Could be an offsite preview attempt. This is very unsafe if
3741                         // HTML is enabled, as it could be an attack.
3742                         $parsedNote = '';
3743                         if ( $this->textbox1 !== '' ) {
3744                                 // Do not put big scary notice, if previewing the empty
3745                                 // string, which happens when you initially edit
3746                                 // a category page, due to automatic preview-on-open.
3747                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3748                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3749                                         true, /* interface */true );
3750                         }
3751                         $this->incrementEditFailureStats( 'session_loss' );
3752                         return $parsedNote;
3753                 }
3754
3755                 $note = '';
3756
3757                 try {
3758                         $content = $this->toEditContent( $this->textbox1 );
3759
3760                         $previewHTML = '';
3761                         if ( !Hooks::run(
3762                                 'AlternateEditPreview',
3763                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3764                         ) {
3765                                 return $previewHTML;
3766                         }
3767
3768                         # provide a anchor link to the editform
3769                         $continueEditing = '<span class="mw-continue-editing">' .
3770                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3771                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3772                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3773                                 if ( $this->mTokenOkExceptSuffix ) {
3774                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3775                                         $this->incrementEditFailureStats( 'bad_token' );
3776                                 } else {
3777                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3778                                         $this->incrementEditFailureStats( 'session_loss' );
3779                                 }
3780                         } elseif ( $this->incompleteForm ) {
3781                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3782                                 if ( $this->mTriedSave ) {
3783                                         $this->incrementEditFailureStats( 'incomplete_form' );
3784                                 }
3785                         } else {
3786                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3787                         }
3788
3789                         # don't parse non-wikitext pages, show message about preview
3790                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3791                                 if ( $this->mTitle->isCssJsSubpage() ) {
3792                                         $level = 'user';
3793                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3794                                         $level = 'site';
3795                                 } else {
3796                                         $level = false;
3797                                 }
3798
3799                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3800                                         $format = 'css';
3801                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3802                                                 $format = false;
3803                                         }
3804                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3805                                         $format = 'js';
3806                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3807                                                 $format = false;
3808                                         }
3809                                 } else {
3810                                         $format = false;
3811                                 }
3812
3813                                 # Used messages to make sure grep find them:
3814                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3815                                 if ( $level && $format ) {
3816                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3817                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3818                                                 ' ' . $continueEditing . "</div>";
3819                                 }
3820                         }
3821
3822                         # If we're adding a comment, we need to show the
3823                         # summary as the headline
3824                         if ( $this->section === "new" && $this->summary !== "" ) {
3825                                 $content = $content->addSectionHeader( $this->summary );
3826                         }
3827
3828                         $hook_args = [ $this, &$content ];
3829                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3830
3831                         $parserResult = $this->doPreviewParse( $content );
3832                         $parserOutput = $parserResult['parserOutput'];
3833                         $previewHTML = $parserResult['html'];
3834                         $this->mParserOutput = $parserOutput;
3835                         $wgOut->addParserOutputMetadata( $parserOutput );
3836
3837                         if ( count( $parserOutput->getWarnings() ) ) {
3838                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3839                         }
3840
3841                 } catch ( MWContentSerializationException $ex ) {
3842                         $m = $this->context->msg(
3843                                 'content-failed-to-parse',
3844                                 $this->contentModel,
3845                                 $this->contentFormat,
3846                                 $ex->getMessage()
3847                         );
3848                         $note .= "\n\n" . $m->parse();
3849                         $previewHTML = '';
3850                 }
3851
3852                 if ( $this->isConflict ) {
3853                         $conflict = '<h2 id="mw-previewconflict">'
3854                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3855                 } else {
3856                         $conflict = '<hr />';
3857                 }
3858
3859                 $previewhead = "<div class='previewnote'>\n" .
3860                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3861                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3862
3863                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3864                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3865                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3866                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3867
3868                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3869         }
3870
3871         private function incrementEditFailureStats( $failureType ) {
3872                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3873                 $stats->increment( 'edit.failures.' . $failureType );
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         public 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         public 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
4059                 $toolbar = '<div id="toolbar"></div>';
4060
4061                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4062                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4063                         // been over-written by a hook caller
4064                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4065                 };
4066
4067                 return $toolbar;
4068         }
4069
4070         /**
4071          * Return an array of checkbox definitions.
4072          *
4073          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4074          *
4075          * Array values are associative arrays with the following keys:
4076          *  - 'label-message' (required): message for label text
4077          *  - 'id' (required): 'id' attribute for the `<input>`
4078          *  - 'default' (required): default checkedness (true or false)
4079          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4080          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4081          *    from messages like 'tooltip-foo', 'accesskey-foo'
4082          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4083          *  - 'legacy-name' (optional): short name for backwards-compatibility
4084          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4085          *   where bool indicates the checked status of the checkbox
4086          * @return array
4087          */
4088         public function getCheckboxesDefinition( $checked ) {
4089                 global $wgUser;
4090                 $checkboxes = [];
4091
4092                 // don't show the minor edit checkbox if it's a new page or section
4093                 if ( !$this->isNew && $wgUser->isAllowed( 'minoredit' ) ) {
4094                         $checkboxes['wpMinoredit'] = [
4095                                 'id' => 'wpMinoredit',
4096                                 'label-message' => 'minoredit',
4097                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4098                                 'tooltip' => 'minoredit',
4099                                 'label-id' => 'mw-editpage-minoredit',
4100                                 'legacy-name' => 'minor',
4101                                 'default' => $checked['minor'],
4102                         ];
4103                 }
4104
4105                 if ( $wgUser->isLoggedIn() ) {
4106                         $checkboxes['wpWatchthis'] = [
4107                                 'id' => 'wpWatchthis',
4108                                 'label-message' => 'watchthis',
4109                                 // Uses messages: tooltip-watch, accesskey-watch
4110                                 'tooltip' => 'watch',
4111                                 'label-id' => 'mw-editpage-watch',
4112                                 'legacy-name' => 'watch',
4113                                 'default' => $checked['watch'],
4114                         ];
4115                 }
4116
4117                 $editPage = $this;
4118                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4119
4120                 return $checkboxes;
4121         }
4122
4123         /**
4124          * Returns an array of html code of the following checkboxes old style:
4125          * minor and watch
4126          *
4127          * @param int &$tabindex Current tabindex
4128          * @param array $checked See getCheckboxesDefinition()
4129          * @return array
4130          */
4131         public function getCheckboxes( &$tabindex, $checked ) {
4132                 global $wgUseMediaWikiUIEverywhere;
4133
4134                 $checkboxes = [];
4135                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4136
4137                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4138                 if ( !$this->isNew ) {
4139                         $checkboxes['minor'] = '';
4140                 }
4141                 $checkboxes['watch'] = '';
4142
4143                 foreach ( $checkboxesDef as $name => $options ) {
4144                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4145                         $label = $this->context->msg( $options['label-message'] )->parse();
4146                         $attribs = [
4147                                 'tabindex' => ++$tabindex,
4148                                 'id' => $options['id'],
4149                         ];
4150                         $labelAttribs = [
4151                                 'for' => $options['id'],
4152                         ];
4153                         if ( isset( $options['tooltip'] ) ) {
4154                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4155                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4156                         }
4157                         if ( isset( $options['title-message'] ) ) {
4158                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4159                         }
4160                         if ( isset( $options['label-id'] ) ) {
4161                                 $labelAttribs['id'] = $options['label-id'];
4162                         }
4163                         $checkboxHtml =
4164                                 Xml::check( $name, $options['default'], $attribs ) .
4165                                 '&#160;' .
4166                                 Xml::tags( 'label', $labelAttribs, $label );
4167
4168                         if ( $wgUseMediaWikiUIEverywhere ) {
4169                                 $checkboxHtml = Html::rawElement( 'div', [ 'class' => 'mw-ui-checkbox' ], $checkboxHtml );
4170                         }
4171
4172                         $checkboxes[ $legacyName ] = $checkboxHtml;
4173                 }
4174
4175                 // Avoid PHP 7.1 warning of passing $this by reference
4176                 $editPage = $this;
4177                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4178                 return $checkboxes;
4179         }
4180
4181         /**
4182          * Returns an array of html code of the following checkboxes:
4183          * minor and watch
4184          *
4185          * @param int &$tabindex Current tabindex
4186          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4187          *                 status of the checkbox
4188          *
4189          * @return array
4190          */
4191         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4192                 $checkboxes = [];
4193                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4194
4195                 $origTabindex = $tabindex;
4196
4197                 foreach ( $checkboxesDef as $name => $options ) {
4198                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4199
4200                         $title = null;
4201                         $accesskey = null;
4202                         if ( isset( $options['tooltip'] ) ) {
4203                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4204                                 $title = Linker::titleAttrib( $options['tooltip'] );
4205                         }
4206                         if ( isset( $options['title-message'] ) ) {
4207                                 $title = $this->context->msg( $options['title-message'] )->text();
4208                         }
4209                         if ( isset( $options['label-id'] ) ) {
4210                                 $labelAttribs['id'] = $options['label-id'];
4211                         }
4212
4213                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4214                                 new OOUI\CheckboxInputWidget( [
4215                                         'tabIndex' => ++$tabindex,
4216                                         'accessKey' => $accesskey,
4217                                         'id' => $options['id'] . 'Widget',
4218                                         'inputId' => $options['id'],
4219                                         'name' => $name,
4220                                         'selected' => $options['default'],
4221                                         'infusable' => true,
4222                                 ] ),
4223                                 [
4224                                         'align' => 'inline',
4225                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4226                                         'title' => $title,
4227                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4228                                 ]
4229                         );
4230                 }
4231
4232                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4233                 // people have used it for the weirdest things completely unrelated to checkboxes...
4234                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4235                 $legacyCheckboxes = $this->getCheckboxes( $origTabindex, $checked );
4236                 foreach ( $legacyCheckboxes as $name => $html ) {
4237                         if ( $html && !isset( $checkboxes[$name] ) ) {
4238                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4239                         }
4240                 }
4241
4242                 return $checkboxes;
4243         }
4244
4245         /**
4246          * Get the message key of the label for the button to save the page
4247          *
4248          * @return string
4249          */
4250         private function getSaveButtonLabel() {
4251                 $labelAsPublish =
4252                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4253
4254                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4255                 $newPage = !$this->mTitle->exists();
4256
4257                 if ( $labelAsPublish ) {
4258                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4259                 } else {
4260                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4261                 }
4262
4263                 return $buttonLabelKey;
4264         }
4265
4266         /**
4267          * Returns an array of html code of the following buttons:
4268          * save, diff and preview
4269          *
4270          * @param int &$tabindex Current tabindex
4271          *
4272          * @return array
4273          */
4274         public function getEditButtons( &$tabindex ) {
4275                 $buttons = [];
4276
4277                 $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
4278
4279                 $attribs = [
4280                         'name' => 'wpSave',
4281                         'tabindex' => ++$tabindex,
4282                 ];
4283
4284                 $saveConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4285                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4286                         'id' => 'wpSaveWidget',
4287                         'inputId' => 'wpSave',
4288                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4289                         'useInputTag' => true,
4290                         'flags' => [ 'constructive', 'primary' ],
4291                         'label' => $buttonLabel,
4292                         'infusable' => true,
4293                         'type' => 'submit',
4294                         'title' => Linker::titleAttrib( 'save' ),
4295                         'accessKey' => Linker::accesskey( 'save' ),
4296                 ] + $saveConfig );
4297
4298                 $attribs = [
4299                         'name' => 'wpPreview',
4300                         'tabindex' => ++$tabindex,
4301                 ];
4302
4303                 $previewConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4304                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4305                         'id' => 'wpPreviewWidget',
4306                         'inputId' => 'wpPreview',
4307                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4308                         'useInputTag' => true,
4309                         'label' => $this->context->msg( 'showpreview' )->text(),
4310                         'infusable' => true,
4311                         'type' => 'submit',
4312                         'title' => Linker::titleAttrib( 'preview' ),
4313                         'accessKey' => Linker::accesskey( 'preview' ),
4314                 ] + $previewConfig );
4315
4316                 $attribs = [
4317                         'name' => 'wpDiff',
4318                         'tabindex' => ++$tabindex,
4319                 ];
4320
4321                 $diffConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4322                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4323                         'id' => 'wpDiffWidget',
4324                         'inputId' => 'wpDiff',
4325                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4326                         'useInputTag' => true,
4327                         'label' => $this->context->msg( 'showdiff' )->text(),
4328                         'infusable' => true,
4329                         'type' => 'submit',
4330                         'title' => Linker::titleAttrib( 'diff' ),
4331                         'accessKey' => Linker::accesskey( 'diff' ),
4332                 ] + $diffConfig );
4333
4334                 // Avoid PHP 7.1 warning of passing $this by reference
4335                 $editPage = $this;
4336                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4337
4338                 return $buttons;
4339         }
4340
4341         /**
4342          * Creates a basic error page which informs the user that
4343          * they have attempted to edit a nonexistent section.
4344          */
4345         public function noSuchSectionPage() {
4346                 global $wgOut;
4347
4348                 $wgOut->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4349
4350                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4351
4352                 // Avoid PHP 7.1 warning of passing $this by reference
4353                 $editPage = $this;
4354                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4355                 $wgOut->addHTML( $res );
4356
4357                 $wgOut->returnToMain( false, $this->mTitle );
4358         }
4359
4360         /**
4361          * Show "your edit contains spam" page with your diff and text
4362          *
4363          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4364          */
4365         public function spamPageWithContent( $match = false ) {
4366                 global $wgOut, $wgLang;
4367                 $this->textbox2 = $this->textbox1;
4368
4369                 if ( is_array( $match ) ) {
4370                         $match = $wgLang->listToText( $match );
4371                 }
4372                 $wgOut->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4373
4374                 $wgOut->addHTML( '<div id="spamprotected">' );
4375                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4376                 if ( $match ) {
4377                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4378                 }
4379                 $wgOut->addHTML( '</div>' );
4380
4381                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4382                 $this->showDiff();
4383
4384                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4385                 $this->showTextbox2();
4386
4387                 $wgOut->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4388         }
4389
4390         /**
4391          * Check if the browser is on a blacklist of user-agents known to
4392          * mangle UTF-8 data on form submission. Returns true if Unicode
4393          * should make it through, false if it's known to be a problem.
4394          * @return bool
4395          */
4396         private function checkUnicodeCompliantBrowser() {
4397                 global $wgBrowserBlackList, $wgRequest;
4398
4399                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4400                 if ( $currentbrowser === false ) {
4401                         // No User-Agent header sent? Trust it by default...
4402                         return true;
4403                 }
4404
4405                 foreach ( $wgBrowserBlackList as $browser ) {
4406                         if ( preg_match( $browser, $currentbrowser ) ) {
4407                                 return false;
4408                         }
4409                 }
4410                 return true;
4411         }
4412
4413         /**
4414          * Filter an input field through a Unicode de-armoring process if it
4415          * came from an old browser with known broken Unicode editing issues.
4416          *
4417          * @param WebRequest $request
4418          * @param string $field
4419          * @return string
4420          */
4421         protected function safeUnicodeInput( $request, $field ) {
4422                 $text = rtrim( $request->getText( $field ) );
4423                 return $request->getBool( 'safemode' )
4424                         ? $this->unmakeSafe( $text )
4425                         : $text;
4426         }
4427
4428         /**
4429          * Filter an output field through a Unicode armoring process if it is
4430          * going to an old browser with known broken Unicode editing issues.
4431          *
4432          * @param string $text
4433          * @return string
4434          */
4435         protected function safeUnicodeOutput( $text ) {
4436                 return $this->checkUnicodeCompliantBrowser()
4437                         ? $text
4438                         : $this->makeSafe( $text );
4439         }
4440
4441         /**
4442          * A number of web browsers are known to corrupt non-ASCII characters
4443          * in a UTF-8 text editing environment. To protect against this,
4444          * detected browsers will be served an armored version of the text,
4445          * with non-ASCII chars converted to numeric HTML character references.
4446          *
4447          * Preexisting such character references will have a 0 added to them
4448          * to ensure that round-trips do not alter the original data.
4449          *
4450          * @param string $invalue
4451          * @return string
4452          */
4453         private function makeSafe( $invalue ) {
4454                 // Armor existing references for reversibility.
4455                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4456
4457                 $bytesleft = 0;
4458                 $result = "";
4459                 $working = 0;
4460                 $valueLength = strlen( $invalue );
4461                 for ( $i = 0; $i < $valueLength; $i++ ) {
4462                         $bytevalue = ord( $invalue[$i] );
4463                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4464                                 $result .= chr( $bytevalue );
4465                                 $bytesleft = 0;
4466                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4467                                 $working = $working << 6;
4468                                 $working += ( $bytevalue & 0x3F );
4469                                 $bytesleft--;
4470                                 if ( $bytesleft <= 0 ) {
4471                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4472                                 }
4473                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4474                                 $working = $bytevalue & 0x1F;
4475                                 $bytesleft = 1;
4476                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4477                                 $working = $bytevalue & 0x0F;
4478                                 $bytesleft = 2;
4479                         } else { // 1111 0xxx
4480                                 $working = $bytevalue & 0x07;
4481                                 $bytesleft = 3;
4482                         }
4483                 }
4484                 return $result;
4485         }
4486
4487         /**
4488          * Reverse the previously applied transliteration of non-ASCII characters
4489          * back to UTF-8. Used to protect data from corruption by broken web browsers
4490          * as listed in $wgBrowserBlackList.
4491          *
4492          * @param string $invalue
4493          * @return string
4494          */
4495         private function unmakeSafe( $invalue ) {
4496                 $result = "";
4497                 $valueLength = strlen( $invalue );
4498                 for ( $i = 0; $i < $valueLength; $i++ ) {
4499                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4500                                 $i += 3;
4501                                 $hexstring = "";
4502                                 do {
4503                                         $hexstring .= $invalue[$i];
4504                                         $i++;
4505                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4506
4507                                 // Do some sanity checks. These aren't needed for reversibility,
4508                                 // but should help keep the breakage down if the editor
4509                                 // breaks one of the entities whilst editing.
4510                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4511                                         $codepoint = hexdec( $hexstring );
4512                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4513                                 } else {
4514                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4515                                 }
4516                         } else {
4517                                 $result .= substr( $invalue, $i, 1 );
4518                         }
4519                 }
4520                 // reverse the transform that we made for reversibility reasons.
4521                 return strtr( $result, [ "&#x0" => "&#x" ] );
4522         }
4523
4524         /**
4525          * @since 1.29
4526          */
4527         protected function addEditNotices() {
4528                 global $wgOut;
4529
4530                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4531                 if ( count( $editNotices ) ) {
4532                         $wgOut->addHTML( implode( "\n", $editNotices ) );
4533                 } else {
4534                         $msg = $this->context->msg( 'editnotice-notext' );
4535                         if ( !$msg->isDisabled() ) {
4536                                 $wgOut->addHTML(
4537                                         '<div class="mw-editnotice-notext">'
4538                                         . $msg->parseAsBlock()
4539                                         . '</div>'
4540                                 );
4541                         }
4542                 }
4543         }
4544
4545         /**
4546          * @since 1.29
4547          */
4548         protected function addTalkPageText() {
4549                 global $wgOut;
4550
4551                 if ( $this->mTitle->isTalkPage() ) {
4552                         $wgOut->addWikiMsg( 'talkpagetext' );
4553                 }
4554         }
4555
4556         /**
4557          * @since 1.29
4558          */
4559         protected function addLongPageWarningHeader() {
4560                 global $wgMaxArticleSize, $wgOut, $wgLang;
4561
4562                 if ( $this->contentLength === false ) {
4563                         $this->contentLength = strlen( $this->textbox1 );
4564                 }
4565
4566                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4567                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4568                                 [
4569                                         'longpageerror',
4570                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4571                                         $wgLang->formatNum( $wgMaxArticleSize )
4572                                 ]
4573                         );
4574                 } else {
4575                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4576                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4577                                         [
4578                                                 'longpage-hint',
4579                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4580                                                 strlen( $this->textbox1 )
4581                                         ]
4582                                 );
4583                         }
4584                 }
4585         }
4586
4587         /**
4588          * @since 1.29
4589          */
4590         protected function addPageProtectionWarningHeaders() {
4591                 global $wgOut;
4592
4593                 if ( $this->mTitle->isProtected( 'edit' ) &&
4594                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4595                 ) {
4596                         # Is the title semi-protected?
4597                         if ( $this->mTitle->isSemiProtected() ) {
4598                                 $noticeMsg = 'semiprotectedpagewarning';
4599                         } else {
4600                                 # Then it must be protected based on static groups (regular)
4601                                 $noticeMsg = 'protectedpagewarning';
4602                         }
4603                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4604                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4605                 }
4606                 if ( $this->mTitle->isCascadeProtected() ) {
4607                         # Is this page under cascading protection from some source pages?
4608                         /** @var Title[] $cascadeSources */
4609                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4610                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4611                         $cascadeSourcesCount = count( $cascadeSources );
4612                         if ( $cascadeSourcesCount > 0 ) {
4613                                 # Explain, and list the titles responsible
4614                                 foreach ( $cascadeSources as $page ) {
4615                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4616                                 }
4617                         }
4618                         $notice .= '</div>';
4619                         $wgOut->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4620                 }
4621                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4622                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
4623                                 [ 'lim' => 1,
4624                                         'showIfEmpty' => false,
4625                                         'msgKey' => [ 'titleprotectedwarning' ],
4626                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4627                 }
4628         }
4629
4630         /**
4631          * @param OutputPage $out
4632          * @since 1.29
4633          */
4634         protected function addExplainConflictHeader( OutputPage $out ) {
4635                 $out->wrapWikiMsg(
4636                         "<div class='mw-explainconflict'>\n$1\n</div>",
4637                         [ 'explainconflict', $this->context->msg( $this->getSaveButtonLabel() )->text() ]
4638                 );
4639         }
4640
4641         /**
4642          * @param string $name
4643          * @param mixed[] $customAttribs
4644          * @param User $user
4645          * @return mixed[]
4646          * @since 1.29
4647          */
4648         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4649                 $attribs = $customAttribs + [
4650                                 'accesskey' => ',',
4651                                 'id' => $name,
4652                                 'cols' => 80,
4653                                 'rows' => 25,
4654                                 // Avoid PHP notices when appending preferences
4655                                 // (appending allows customAttribs['style'] to still work).
4656                                 'style' => ''
4657                         ];
4658
4659                 // The following classes can be used here:
4660                 // * mw-editfont-default
4661                 // * mw-editfont-monospace
4662                 // * mw-editfont-sans-serif
4663                 // * mw-editfont-serif
4664                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4665
4666                 if ( isset( $attribs['class'] ) ) {
4667                         if ( is_string( $attribs['class'] ) ) {
4668                                 $attribs['class'] .= ' ' . $class;
4669                         } elseif ( is_array( $attribs['class'] ) ) {
4670                                 $attribs['class'][] = $class;
4671                         }
4672                 } else {
4673                         $attribs['class'] = $class;
4674                 }
4675
4676                 $pageLang = $this->mTitle->getPageLanguage();
4677                 $attribs['lang'] = $pageLang->getHtmlCode();
4678                 $attribs['dir'] = $pageLang->getDir();
4679
4680                 return $attribs;
4681         }
4682
4683         /**
4684          * @param string $wikitext
4685          * @return string
4686          * @since 1.29
4687          */
4688         protected function addNewLineAtEnd( $wikitext ) {
4689                 if ( strval( $wikitext ) !== '' ) {
4690                         // Ensure there's a newline at the end, otherwise adding lines
4691                         // is awkward.
4692                         // But don't add a newline if the text is empty, or Firefox in XHTML
4693                         // mode will show an extra newline. A bit annoying.
4694                         $wikitext .= "\n";
4695                         return $wikitext;
4696                 }
4697                 return $wikitext;
4698         }
4699
4700         /**
4701          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4702          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4703          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4704          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4705          * spread the new style links more efficiently.
4706          *
4707          * @param string $text
4708          * @return string
4709          */
4710         private function guessSectionName( $text ) {
4711                 global $wgParser;
4712
4713                 // Detect Microsoft browsers
4714                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4715                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4716                         // ...and redirect them to legacy encoding, if available
4717                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4718                 }
4719                 // Meanwhile, real browsers get real anchors
4720                 return $wgParser->guessSectionNameFromWikiText( $text );
4721         }
4722 }