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                 wfDeprecated( __METHOD__, '1.29' );
 515                 $this->edit();
 516         }
 517
 518         /**
 519          * This is the function that gets called for "action=edit". It
 520          * sets up various member variables, then passes execution to
 521          * another function, usually showEditForm()
 522          *
 523          * The edit form is self-submitting, so that when things like
 524          * preview and edit conflicts occur, we get the same form back
 525          * with the extra stuff added.  Only when the final submission
 526          * is made and all is well do we actually save and redirect to
 527          * the newly-edited page.
 528          */
 529         public function edit() {
 530                 global $wgRequest, $wgUser;
 531                 // Allow extensions to modify/prevent this form or submission
 532                 if ( !Hooks::run( 'AlternateEdit', [ $this ] ) ) {
 533                         return;
 534                 }
 535
 536                 wfDebug( __METHOD__ . ": enter\n" );
 537
 538                 // If they used redlink=1 and the page exists, redirect to the main article
 539                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 540                         $this->context->getOutput()->redirect( $this->mTitle->getFullURL() );
 541                         return;
 542                 }
 543
 544                 $this->importFormData( $wgRequest );
 545                 $this->firsttime = false;
 546
 547                 if ( wfReadOnly() && $this->save ) {
 548                         // Force preview
 549                         $this->save = false;
 550                         $this->preview = true;
 551                 }
 552
 553                 if ( $this->save ) {
 554                         $this->formtype = 'save';
 555                 } elseif ( $this->preview ) {
 556                         $this->formtype = 'preview';
 557                 } elseif ( $this->diff ) {
 558                         $this->formtype = 'diff';
 559                 } else { # First time through
 560                         $this->firsttime = true;
 561                         if ( $this->previewOnOpen() ) {
 562                                 $this->formtype = 'preview';
 563                         } else {
 564                                 $this->formtype = 'initial';
 565                         }
 566                 }
 567
 568                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 569                 if ( $permErrors ) {
 570                         wfDebug( __METHOD__ . ": User can't edit\n" );
 571                         // Auto-block user's IP if the account was "hard" blocked
 572                         if ( !wfReadOnly() ) {
 573                                 $user = $wgUser;
 574                                 DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 575                                         $user->spreadAnyEditBlock();
 576                                 } );
 577                         }
 578                         $this->displayPermissionsError( $permErrors );
 579
 580                         return;
 581                 }
 582
 583                 $revision = $this->mArticle->getRevisionFetched();
 584                 // Disallow editing revisions with content models different from the current one
 585                 // Undo edits being an exception in order to allow reverting content model changes.
 586                 if ( $revision
 587                         && $revision->getContentModel() !== $this->contentModel
 588                 ) {
 589                         $prevRev = null;
 590                         if ( $this->undidRev ) {
 591                                 $undidRevObj = Revision::newFromId( $this->undidRev );
 592                                 $prevRev = $undidRevObj ? $undidRevObj->getPrevious() : null;
 593                         }
 594                         if ( !$this->undidRev
 595                                 || !$prevRev
 596                                 || $prevRev->getContentModel() !== $this->contentModel
 597                         ) {
 598                                 $this->displayViewSourcePage(
 599                                         $this->getContentObject(),
 600                                         $this->context->msg(
 601                                                 'contentmodelediterror',
 602                                                 $revision->getContentModel(),
 603                                                 $this->contentModel
 604                                         )->plain()
 605                                 );
 606                                 return;
 607                         }
 608                 }
 609
 610                 $this->isConflict = false;
 611                 // css / js subpages of user pages get a special treatment
 612                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 613                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 614                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 615                 // @todo FIXME: Silly assignment.
 616                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 617
 618                 # Show applicable editing introductions
 619                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 620                         $this->showIntro();
 621                 }
 622
 623                 # Attempt submission here.  This will check for edit conflicts,
 624                 # and redundantly check for locked database, blocked IPs, etc.
 625                 # that edit() already checked just in case someone tries to sneak
 626                 # in the back door with a hand-edited submission URL.
 627
 628                 if ( 'save' == $this->formtype ) {
 629                         $resultDetails = null;
 630                         $status = $this->attemptSave( $resultDetails );
 631                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 632                                 return;
 633                         }
 634                 }
 635
 636                 # First time through: get contents, set time for conflict
 637                 # checking, etc.
 638                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 639                         if ( $this->initialiseForm() === false ) {
 640                                 $this->noSuchSectionPage();
 641                                 return;
 642                         }
 643
 644                         if ( !$this->mTitle->getArticleID() ) {
 645                                 Hooks::run( 'EditFormPreloadText', [ &$this->textbox1, &$this->mTitle ] );
 646                         } else {
 647                                 Hooks::run( 'EditFormInitialText', [ $this ] );
 648                         }
 649
 650                 }
 651
 652                 $this->showEditForm();
 653         }
 654
 655         /**
 656          * @param string $rigor Same format as Title::getUserPermissionErrors()
 657          * @return array
 658          */
 659         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 660                 global $wgUser;
 661
 662                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 663                 # Can this title be created?
 664                 if ( !$this->mTitle->exists() ) {
 665                         $permErrors = array_merge(
 666                                 $permErrors,
 667                                 wfArrayDiff2(
 668                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 669                                         $permErrors
 670                                 )
 671                         );
 672                 }
 673                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 674                 $remove = [];
 675                 foreach ( $permErrors as $error ) {
 676                         if ( ( $this->preview || $this->diff )
 677                                 && (
 678                                         $error[0] == 'blockedtext' ||
 679                                         $error[0] == 'autoblockedtext' ||
 680                                         $error[0] == 'systemblockedtext'
 681                                 )
 682                         ) {
 683                                 $remove[] = $error;
 684                         }
 685                 }
 686                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 687
 688                 return $permErrors;
 689         }
 690
 691         /**
 692          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 693          * but with the following differences:
 694          * - If redlink=1, the user will be redirected to the page
 695          * - If there is content to display or the error occurs while either saving,
 696          *   previewing or showing the difference, it will be a
 697          *   "View source for ..." page displaying the source code after the error message.
 698          *
 699          * @since 1.19
 700          * @param array $permErrors Array of permissions errors, as returned by
 701          *    Title::getUserPermissionsErrors().
 702          * @throws PermissionsError
 703          */
 704         protected function displayPermissionsError( array $permErrors ) {
 705                 global $wgRequest;
 706
 707                 $out = $this->context->getOutput();
 708                 if ( $wgRequest->getBool( 'redlink' ) ) {
 709                         // The edit page was reached via a red link.
 710                         // Redirect to the article page and let them click the edit tab if
 711                         // they really want a permission error.
 712                         $out->redirect( $this->mTitle->getFullURL() );
 713                         return;
 714                 }
 715
 716                 $content = $this->getContentObject();
 717
 718                 # Use the normal message if there's nothing to display
 719                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 720                         $action = $this->mTitle->exists() ? 'edit' :
 721                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 722                         throw new PermissionsError( $action, $permErrors );
 723                 }
 724
 725                 $this->displayViewSourcePage(
 726                         $content,
 727                         $out->formatPermissionsErrorMessage( $permErrors, 'edit' )
 728                 );
 729         }
 730
 731         /**
 732          * Display a read-only View Source page
 733          * @param Content $content content object
 734          * @param string $errorMessage additional wikitext error message to display
 735          */
 736         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 737                 $out = $this->context->getOutput();
 738                 Hooks::run( 'EditPage::showReadOnlyForm:initial', [ $this, &$out ] );
 739
 740                 $out->setRobotPolicy( 'noindex,nofollow' );
 741                 $out->setPageTitle( $this->context->msg(
 742                         'viewsource-title',
 743                         $this->getContextTitle()->getPrefixedText()
 744                 ) );
 745                 $out->addBacklinkSubtitle( $this->getContextTitle() );
 746                 $out->addHTML( $this->editFormPageTop );
 747                 $out->addHTML( $this->editFormTextTop );
 748
 749                 if ( $errorMessage !== '' ) {
 750                         $out->addWikiText( $errorMessage );
 751                         $out->addHTML( "<hr />\n" );
 752                 }
 753
 754                 # If the user made changes, preserve them when showing the markup
 755                 # (This happens when a user is blocked during edit, for instance)
 756                 if ( !$this->firsttime ) {
 757                         $text = $this->textbox1;
 758                         $out->addWikiMsg( 'viewyourtext' );
 759                 } else {
 760                         try {
 761                                 $text = $this->toEditText( $content );
 762                         } catch ( MWException $e ) {
 763                                 # Serialize using the default format if the content model is not supported
 764                                 # (e.g. for an old revision with a different model)
 765                                 $text = $content->serialize();
 766                         }
 767                         $out->addWikiMsg( 'viewsourcetext' );
 768                 }
 769
 770                 $out->addHTML( $this->editFormTextBeforeContent );
 771                 $this->showTextbox( $text, 'wpTextbox1', [ 'readonly' ] );
 772                 $out->addHTML( $this->editFormTextAfterContent );
 773
 774                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
 775
 776                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 777
 778                 $out->addHTML( $this->editFormTextBottom );
 779                 if ( $this->mTitle->exists() ) {
 780                         $out->returnToMain( null, $this->mTitle );
 781                 }
 782         }
 783
 784         /**
 785          * Should we show a preview when the edit form is first shown?
 786          *
 787          * @return bool
 788          */
 789         protected function previewOnOpen() {
 790                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 791                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 792                         // Explicit override from request
 793                         return true;
 794                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 795                         // Explicit override from request
 796                         return false;
 797                 } elseif ( $this->section == 'new' ) {
 798                         // Nothing *to* preview for new sections
 799                         return false;
 800                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 801                         && $wgUser->getOption( 'previewonfirst' )
 802                 ) {
 803                         // Standard preference behavior
 804                         return true;
 805                 } elseif ( !$this->mTitle->exists()
 806                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 807                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 808                 ) {
 809                         // Categories are special
 810                         return true;
 811                 } else {
 812                         return false;
 813                 }
 814         }
 815
 816         /**
 817          * Checks whether the user entered a skin name in uppercase,
 818          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 819          *
 820          * @return bool
 821          */
 822         protected function isWrongCaseCssJsPage() {
 823                 if ( $this->mTitle->isCssJsSubpage() ) {
 824                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 825                         $skins = array_merge(
 826                                 array_keys( Skin::getSkinNames() ),
 827                                 [ 'common' ]
 828                         );
 829                         return !in_array( $name, $skins )
 830                                 && in_array( strtolower( $name ), $skins );
 831                 } else {
 832                         return false;
 833                 }
 834         }
 835
 836         /**
 837          * Returns whether section editing is supported for the current page.
 838          * Subclasses may override this to replace the default behavior, which is
 839          * to check ContentHandler::supportsSections.
 840          *
 841          * @return bool True if this edit page supports sections, false otherwise.
 842          */
 843         protected function isSectionEditSupported() {
 844                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 845                 return $contentHandler->supportsSections();
 846         }
 847
 848         /**
 849          * This function collects the form data and uses it to populate various member variables.
 850          * @param WebRequest &$request
 851          * @throws ErrorPageError
 852          */
 853         public function importFormData( &$request ) {
 854                 global $wgContLang, $wgUser;
 855
 856                 # Section edit can come from either the form or a link
 857                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 858
 859                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 860                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 861                 }
 862
 863                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 864
 865                 if ( $request->wasPosted() ) {
 866                         # These fields need to be checked for encoding.
 867                         # Also remove trailing whitespace, but don't remove _initial_
 868                         # whitespace from the text boxes. This may be significant formatting.
 869                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 870                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 871                                 // Skip this if wpTextbox2 has input, it indicates that we came
 872                                 // from a conflict page with raw page text, not a custom form
 873                                 // modified by subclasses
 874                                 $textbox1 = $this->importContentFormData( $request );
 875                                 if ( $textbox1 !== null ) {
 876                                         $this->textbox1 = $textbox1;
 877                                 }
 878                         }
 879
 880                         # Truncate for whole multibyte characters
 881                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 882
 883                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 884                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 885                         # section titles.
 886                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 887
 888                         # Treat sectiontitle the same way as summary.
 889                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 890                         # currently doing double duty as both edit summary and section title. Right now this
 891                         # is just to allow API edits to work around this limitation, but this should be
 892                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 893                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 894                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 895
 896                         $this->edittime = $request->getVal( 'wpEdittime' );
 897                         $this->editRevId = $request->getIntOrNull( 'editRevId' );
 898                         $this->starttime = $request->getVal( 'wpStarttime' );
 899
 900                         $undidRev = $request->getInt( 'wpUndidRevision' );
 901                         if ( $undidRev ) {
 902                                 $this->undidRev = $undidRev;
 903                         }
 904
 905                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 906
 907                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 908                                 // wpTextbox1 field is missing, possibly due to being "too big"
 909                                 // according to some filter rules such as Suhosin's setting for
 910                                 // suhosin.request.max_value_length (d'oh)
 911                                 $this->incompleteForm = true;
 912                         } else {
 913                                 // If we receive the last parameter of the request, we can fairly
 914                                 // claim the POST request has not been truncated.
 915
 916                                 // TODO: softened the check for cutover.  Once we determine
 917                                 // that it is safe, we should complete the transition by
 918                                 // removing the "edittime" clause.
 919                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 920                                         && is_null( $this->edittime ) );
 921                         }
 922                         if ( $this->incompleteForm ) {
 923                                 # If the form is incomplete, force to preview.
 924                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 925                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 926                                 $this->preview = true;
 927                         } else {
 928                                 $this->preview = $request->getCheck( 'wpPreview' );
 929                                 $this->diff = $request->getCheck( 'wpDiff' );
 930
 931                                 // Remember whether a save was requested, so we can indicate
 932                                 // if we forced preview due to session failure.
 933                                 $this->mTriedSave = !$this->preview;
 934
 935                                 if ( $this->tokenOk( $request ) ) {
 936                                         # Some browsers will not report any submit button
 937                                         # if the user hits enter in the comment box.
 938                                         # The unmarked state will be assumed to be a save,
 939                                         # if the form seems otherwise complete.
 940                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 941                                 } elseif ( $this->diff ) {
 942                                         # Failed token check, but only requested "Show Changes".
 943                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 944                                 } else {
 945                                         # Page might be a hack attempt posted from
 946                                         # an external site. Preview instead of saving.
 947                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 948                                         $this->preview = true;
 949                                 }
 950                         }
 951                         $this->save = !$this->preview && !$this->diff;
 952                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 953                                 $this->edittime = null;
 954                         }
 955
 956                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 957                                 $this->starttime = null;
 958                         }
 959
 960                         $this->recreate = $request->getCheck( 'wpRecreate' );
 961
 962                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 963                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 964
 965                         # Don't force edit summaries when a user is editing their own user or talk page
 966                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 967                                 && $this->mTitle->getText() == $wgUser->getName()
 968                         ) {
 969                                 $this->allowBlankSummary = true;
 970                         } else {
 971                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 972                                         || !$wgUser->getOption( 'forceeditsummary' );
 973                         }
 974
 975                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 976
 977                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 978                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 979
 980                         $changeTags = $request->getVal( 'wpChangeTags' );
 981                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 982                                 $this->changeTags = [];
 983                         } else {
 984                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 985                                         $changeTags ) ) );
 986                         }
 987                 } else {
 988                         # Not a posted form? Start with nothing.
 989                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 990                         $this->textbox1 = '';
 991                         $this->summary = '';
 992                         $this->sectiontitle = '';
 993                         $this->edittime = '';
 994                         $this->editRevId = null;
 995                         $this->starttime = wfTimestampNow();
 996                         $this->edit = false;
 997                         $this->preview = false;
 998                         $this->save = false;
 999                         $this->diff = false;
1000                         $this->minoredit = false;
1001                         // Watch may be overridden by request parameters
1002                         $this->watchthis = $request->getBool( 'watchthis', false );
1003                         $this->recreate = false;
1004
1005                         // When creating a new section, we can preload a section title by passing it as the
1006                         // preloadtitle parameter in the URL (T15100)
1007                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
1008                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
1009                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
1010                                 $this->summary = $request->getVal( 'preloadtitle' );
1011                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
1012                                 $this->summary = $request->getText( 'summary' );
1013                                 if ( $this->summary !== '' ) {
1014                                         $this->hasPresetSummary = true;
1015                                 }
1016                         }
1017
1018                         if ( $request->getVal( 'minor' ) ) {
1019                                 $this->minoredit = true;
1020                         }
1021                 }
1022
1023                 $this->oldid = $request->getInt( 'oldid' );
1024                 $this->parentRevId = $request->getInt( 'parentRevId' );
1025
1026                 $this->bot = $request->getBool( 'bot', true );
1027                 $this->nosummary = $request->getBool( 'nosummary' );
1028
1029                 // May be overridden by revision.
1030                 $this->contentModel = $request->getText( 'model', $this->contentModel );
1031                 // May be overridden by revision.
1032                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
1033
1034                 try {
1035                         $handler = ContentHandler::getForModelID( $this->contentModel );
1036                 } catch ( MWUnknownContentModelException $e ) {
1037                         throw new ErrorPageError(
1038                                 'editpage-invalidcontentmodel-title',
1039                                 'editpage-invalidcontentmodel-text',
1040                                 [ wfEscapeWikiText( $this->contentModel ) ]
1041                         );
1042                 }
1043
1044                 if ( !$handler->isSupportedFormat( $this->contentFormat ) ) {
1045                         throw new ErrorPageError(
1046                                 'editpage-notsupportedcontentformat-title',
1047                                 'editpage-notsupportedcontentformat-text',
1048                                 [
1049                                         wfEscapeWikiText( $this->contentFormat ),
1050                                         wfEscapeWikiText( ContentHandler::getLocalizedName( $this->contentModel ) )
1051                                 ]
1052                         );
1053                 }
1054
1055                 /**
1056                  * @todo Check if the desired model is allowed in this namespace, and if
1057                  *   a transition from the page's current model to the new model is
1058                  *   allowed.
1059                  */
1060
1061                 $this->editintro = $request->getText( 'editintro',
1062                         // Custom edit intro for new sections
1063                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
1064
1065                 // Allow extensions to modify form data
1066                 Hooks::run( 'EditPage::importFormData', [ $this, $request ] );
1067         }
1068
1069         /**
1070          * Subpage overridable method for extracting the page content data from the
1071          * posted form to be placed in $this->textbox1, if using customized input
1072          * this method should be overridden and return the page text that will be used
1073          * for saving, preview parsing and so on...
1074          *
1075          * @param WebRequest &$request
1076          * @return string|null
1077          */
1078         protected function importContentFormData( &$request ) {
1079                 return; // Don't do anything, EditPage already extracted wpTextbox1
1080         }
1081
1082         /**
1083          * Initialise form fields in the object
1084          * Called on the first invocation, e.g. when a user clicks an edit link
1085          * @return bool If the requested section is valid
1086          */
1087         public function initialiseForm() {
1088                 global $wgUser;
1089                 $this->edittime = $this->page->getTimestamp();
1090                 $this->editRevId = $this->page->getLatest();
1091
1092                 $content = $this->getContentObject( false ); # TODO: track content object?!
1093                 if ( $content === false ) {
1094                         return false;
1095                 }
1096                 $this->textbox1 = $this->toEditText( $content );
1097
1098                 // activate checkboxes if user wants them to be always active
1099                 # Sort out the "watch" checkbox
1100                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1101                         # Watch all edits
1102                         $this->watchthis = true;
1103                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1104                         # Watch creations
1105                         $this->watchthis = true;
1106                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1107                         # Already watched
1108                         $this->watchthis = true;
1109                 }
1110                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1111                         $this->minoredit = true;
1112                 }
1113                 if ( $this->textbox1 === false ) {
1114                         return false;
1115                 }
1116                 return true;
1117         }
1118
1119         /**
1120          * @param Content|null $def_content The default value to return
1121          *
1122          * @return Content|null Content on success, $def_content for invalid sections
1123          *
1124          * @since 1.21
1125          */
1126         protected function getContentObject( $def_content = null ) {
1127                 global $wgRequest, $wgUser, $wgContLang;
1128
1129                 $content = false;
1130
1131                 // For message page not locally set, use the i18n message.
1132                 // For other non-existent articles, use preload text if any.
1133                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1134                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1135                                 # If this is a system message, get the default text.
1136                                 $msg = $this->mTitle->getDefaultMessageText();
1137
1138                                 $content = $this->toEditContent( $msg );
1139                         }
1140                         if ( $content === false ) {
1141                                 # If requested, preload some text.
1142                                 $preload = $wgRequest->getVal( 'preload',
1143                                         // Custom preload text for new sections
1144                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1145                                 $params = $wgRequest->getArray( 'preloadparams', [] );
1146
1147                                 $content = $this->getPreloadedContent( $preload, $params );
1148                         }
1149                 // For existing pages, get text based on "undo" or section parameters.
1150                 } else {
1151                         if ( $this->section != '' ) {
1152                                 // Get section edit text (returns $def_text for invalid sections)
1153                                 $orig = $this->getOriginalContent( $wgUser );
1154                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1155
1156                                 if ( !$content ) {
1157                                         $content = $def_content;
1158                                 }
1159                         } else {
1160                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1161                                 $undo = $wgRequest->getInt( 'undo' );
1162
1163                                 if ( $undo > 0 && $undoafter > 0 ) {
1164                                         $undorev = Revision::newFromId( $undo );
1165                                         $oldrev = Revision::newFromId( $undoafter );
1166
1167                                         # Sanity check, make sure it's the right page,
1168                                         # the revisions exist and they were not deleted.
1169                                         # Otherwise, $content will be left as-is.
1170                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1171                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1172                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1173                                         ) {
1174                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1175
1176                                                 if ( $content === false ) {
1177                                                         # Warn the user that something went wrong
1178                                                         $undoMsg = 'failure';
1179                                                 } else {
1180                                                         $oldContent = $this->page->getContent( Revision::RAW );
1181                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1182                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1183                                                         if ( $newContent->getModel() !== $oldContent->getModel() ) {
1184                                                                 // The undo may change content
1185                                                                 // model if its reverting the top
1186                                                                 // edit. This can result in
1187                                                                 // mismatched content model/format.
1188                                                                 $this->contentModel = $newContent->getModel();
1189                                                                 $this->contentFormat = $oldrev->getContentFormat();
1190                                                         }
1191
1192                                                         if ( $newContent->equals( $oldContent ) ) {
1193                                                                 # Tell the user that the undo results in no change,
1194                                                                 # i.e. the revisions were already undone.
1195                                                                 $undoMsg = 'nochange';
1196                                                                 $content = false;
1197                                                         } else {
1198                                                                 # Inform the user of our success and set an automatic edit summary
1199                                                                 $undoMsg = 'success';
1200
1201                                                                 # If we just undid one rev, use an autosummary
1202                                                                 $firstrev = $oldrev->getNext();
1203                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1204                                                                         $userText = $undorev->getUserText();
1205                                                                         if ( $userText === '' ) {
1206                                                                                 $undoSummary = $this->context->msg(
1207                                                                                         'undo-summary-username-hidden',
1208                                                                                         $undo
1209                                                                                 )->inContentLanguage()->text();
1210                                                                         } else {
1211                                                                                 $undoSummary = $this->context->msg(
1212                                                                                         'undo-summary',
1213                                                                                         $undo,
1214                                                                                         $userText
1215                                                                                 )->inContentLanguage()->text();
1216                                                                         }
1217                                                                         if ( $this->summary === '' ) {
1218                                                                                 $this->summary = $undoSummary;
1219                                                                         } else {
1220                                                                                 $this->summary = $undoSummary . $this->context->msg( 'colon-separator' )
1221                                                                                         ->inContentLanguage()->text() . $this->summary;
1222                                                                         }
1223                                                                         $this->undidRev = $undo;
1224                                                                 }
1225                                                                 $this->formtype = 'diff';
1226                                                         }
1227                                                 }
1228                                         } else {
1229                                                 // Failed basic sanity checks.
1230                                                 // Older revisions may have been removed since the link
1231                                                 // was created, or we may simply have got bogus input.
1232                                                 $undoMsg = 'norev';
1233                                         }
1234
1235                                         $out = $this->context->getOutput();
1236                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1237                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1238                                         $this->editFormPageTop .= $out->parse( "<div class=\"{$class}\">" .
1239                                                 $this->context->msg( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1240                                 }
1241
1242                                 if ( $content === false ) {
1243                                         $content = $this->getOriginalContent( $wgUser );
1244                                 }
1245                         }
1246                 }
1247
1248                 return $content;
1249         }
1250
1251         /**
1252          * Get the content of the wanted revision, without section extraction.
1253          *
1254          * The result of this function can be used to compare user's input with
1255          * section replaced in its context (using WikiPage::replaceSectionAtRev())
1256          * to the original text of the edit.
1257          *
1258          * This differs from Article::getContent() that when a missing revision is
1259          * encountered the result will be null and not the
1260          * 'missing-revision' message.
1261          *
1262          * @since 1.19
1263          * @param User $user The user to get the revision for
1264          * @return Content|null
1265          */
1266         private function getOriginalContent( User $user ) {
1267                 if ( $this->section == 'new' ) {
1268                         return $this->getCurrentContent();
1269                 }
1270                 $revision = $this->mArticle->getRevisionFetched();
1271                 if ( $revision === null ) {
1272                         $handler = ContentHandler::getForModelID( $this->contentModel );
1273                         return $handler->makeEmptyContent();
1274                 }
1275                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1276                 return $content;
1277         }
1278
1279         /**
1280          * Get the edit's parent revision ID
1281          *
1282          * The "parent" revision is the ancestor that should be recorded in this
1283          * page's revision history.  It is either the revision ID of the in-memory
1284          * article content, or in the case of a 3-way merge in order to rebase
1285          * across a recoverable edit conflict, the ID of the newer revision to
1286          * which we have rebased this page.
1287          *
1288          * @since 1.27
1289          * @return int Revision ID
1290          */
1291         public function getParentRevId() {
1292                 if ( $this->parentRevId ) {
1293                         return $this->parentRevId;
1294                 } else {
1295                         return $this->mArticle->getRevIdFetched();
1296                 }
1297         }
1298
1299         /**
1300          * Get the current content of the page. This is basically similar to
1301          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1302          * content object is returned instead of null.
1303          *
1304          * @since 1.21
1305          * @return Content
1306          */
1307         protected function getCurrentContent() {
1308                 $rev = $this->page->getRevision();
1309                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1310
1311                 if ( $content === false || $content === null ) {
1312                         $handler = ContentHandler::getForModelID( $this->contentModel );
1313                         return $handler->makeEmptyContent();
1314                 } elseif ( !$this->undidRev ) {
1315                         // Content models should always be the same since we error
1316                         // out if they are different before this point (in ->edit()).
1317                         // The exception being, during an undo, the current revision might
1318                         // differ from the prior revision.
1319                         $logger = LoggerFactory::getInstance( 'editpage' );
1320                         if ( $this->contentModel !== $rev->getContentModel() ) {
1321                                 $logger->warning( "Overriding content model from current edit {prev} to {new}", [
1322                                         'prev' => $this->contentModel,
1323                                         'new' => $rev->getContentModel(),
1324                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1325                                         'method' => __METHOD__
1326                                 ] );
1327                                 $this->contentModel = $rev->getContentModel();
1328                         }
1329
1330                         // Given that the content models should match, the current selected
1331                         // format should be supported.
1332                         if ( !$content->isSupportedFormat( $this->contentFormat ) ) {
1333                                 $logger->warning( "Current revision content format unsupported. Overriding {prev} to {new}", [
1334
1335                                         'prev' => $this->contentFormat,
1336                                         'new' => $rev->getContentFormat(),
1337                                         'title' => $this->getTitle()->getPrefixedDBkey(),
1338                                         'method' => __METHOD__
1339                                 ] );
1340                                 $this->contentFormat = $rev->getContentFormat();
1341                         }
1342                 }
1343                 return $content;
1344         }
1345
1346         /**
1347          * Use this method before edit() to preload some content into the edit box
1348          *
1349          * @param Content $content
1350          *
1351          * @since 1.21
1352          */
1353         public function setPreloadedContent( Content $content ) {
1354                 $this->mPreloadContent = $content;
1355         }
1356
1357         /**
1358          * Get the contents to be preloaded into the box, either set by
1359          * an earlier setPreloadText() or by loading the given page.
1360          *
1361          * @param string $preload Representing the title to preload from.
1362          * @param array $params Parameters to use (interface-message style) in the preloaded text
1363          *
1364          * @return Content
1365          *
1366          * @since 1.21
1367          */
1368         protected function getPreloadedContent( $preload, $params = [] ) {
1369                 global $wgUser;
1370
1371                 if ( !empty( $this->mPreloadContent ) ) {
1372                         return $this->mPreloadContent;
1373                 }
1374
1375                 $handler = ContentHandler::getForModelID( $this->contentModel );
1376
1377                 if ( $preload === '' ) {
1378                         return $handler->makeEmptyContent();
1379                 }
1380
1381                 $title = Title::newFromText( $preload );
1382                 # Check for existence to avoid getting MediaWiki:Noarticletext
1383                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1384                         // TODO: somehow show a warning to the user!
1385                         return $handler->makeEmptyContent();
1386                 }
1387
1388                 $page = WikiPage::factory( $title );
1389                 if ( $page->isRedirect() ) {
1390                         $title = $page->getRedirectTarget();
1391                         # Same as before
1392                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1393                                 // TODO: somehow show a warning to the user!
1394                                 return $handler->makeEmptyContent();
1395                         }
1396                         $page = WikiPage::factory( $title );
1397                 }
1398
1399                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1400                 $content = $page->getContent( Revision::RAW );
1401
1402                 if ( !$content ) {
1403                         // TODO: somehow show a warning to the user!
1404                         return $handler->makeEmptyContent();
1405                 }
1406
1407                 if ( $content->getModel() !== $handler->getModelID() ) {
1408                         $converted = $content->convert( $handler->getModelID() );
1409
1410                         if ( !$converted ) {
1411                                 // TODO: somehow show a warning to the user!
1412                                 wfDebug( "Attempt to preload incompatible content: " .
1413                                         "can't convert " . $content->getModel() .
1414                                         " to " . $handler->getModelID() );
1415
1416                                 return $handler->makeEmptyContent();
1417                         }
1418
1419                         $content = $converted;
1420                 }
1421
1422                 return $content->preloadTransform( $title, $parserOptions, $params );
1423         }
1424
1425         /**
1426          * Make sure the form isn't faking a user's credentials.
1427          *
1428          * @param WebRequest &$request
1429          * @return bool
1430          * @private
1431          */
1432         public function tokenOk( &$request ) {
1433                 global $wgUser;
1434                 $token = $request->getVal( 'wpEditToken' );
1435                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1436                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1437                 return $this->mTokenOk;
1438         }
1439
1440         /**
1441          * Sets post-edit cookie indicating the user just saved a particular revision.
1442          *
1443          * This uses a temporary cookie for each revision ID so separate saves will never
1444          * interfere with each other.
1445          *
1446          * Article::view deletes the cookie on server-side after the redirect and
1447          * converts the value to the global JavaScript variable wgPostEdit.
1448          *
1449          * If the variable were set on the server, it would be cached, which is unwanted
1450          * since the post-edit state should only apply to the load right after the save.
1451          *
1452          * @param int $statusValue The status value (to check for new article status)
1453          */
1454         protected function setPostEditCookie( $statusValue ) {
1455                 $revisionId = $this->page->getLatest();
1456                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1457
1458                 $val = 'saved';
1459                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1460                         $val = 'created';
1461                 } elseif ( $this->oldid ) {
1462                         $val = 'restored';
1463                 }
1464
1465                 $response = $this->context->getRequest()->response();
1466                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION );
1467         }
1468
1469         /**
1470          * Attempt submission
1471          * @param array|bool &$resultDetails See docs for $result in internalAttemptSave
1472          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1473          * @return Status The resulting status object.
1474          */
1475         public function attemptSave( &$resultDetails = false ) {
1476                 global $wgUser;
1477
1478                 # Allow bots to exempt some edits from bot flagging
1479                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1480                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1481
1482                 Hooks::run( 'EditPage::attemptSave:after', [ $this, $status, $resultDetails ] );
1483
1484                 return $status;
1485         }
1486
1487         /**
1488          * Log when a page was successfully saved after the edit conflict view
1489          */
1490         private function incrementResolvedConflicts() {
1491                 global $wgRequest;
1492
1493                 if ( $wgRequest->getText( 'mode' ) !== 'conflict' ) {
1494                         return;
1495                 }
1496
1497                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
1498                 $stats->increment( 'edit.failures.conflict.resolved' );
1499         }
1500
1501         /**
1502          * Handle status, such as after attempt save
1503          *
1504          * @param Status $status
1505          * @param array|bool $resultDetails
1506          *
1507          * @throws ErrorPageError
1508          * @return bool False, if output is done, true if rest of the form should be displayed
1509          */
1510         private function handleStatus( Status $status, $resultDetails ) {
1511                 global $wgUser;
1512
1513                 /**
1514                  * @todo FIXME: once the interface for internalAttemptSave() is made
1515                  *   nicer, this should use the message in $status
1516                  */
1517                 if ( $status->value == self::AS_SUCCESS_UPDATE
1518                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1519                 ) {
1520                         $this->incrementResolvedConflicts();
1521
1522                         $this->didSave = true;
1523                         if ( !$resultDetails['nullEdit'] ) {
1524                                 $this->setPostEditCookie( $status->value );
1525                         }
1526                 }
1527
1528                 $out = $this->context->getOutput();
1529
1530                 // "wpExtraQueryRedirect" is a hidden input to modify
1531                 // after save URL and is not used by actual edit form
1532                 $request = $this->context->getRequest();
1533                 $extraQueryRedirect = $request->getVal( 'wpExtraQueryRedirect' );
1534
1535                 switch ( $status->value ) {
1536                         case self::AS_HOOK_ERROR_EXPECTED:
1537                         case self::AS_CONTENT_TOO_BIG:
1538                         case self::AS_ARTICLE_WAS_DELETED:
1539                         case self::AS_CONFLICT_DETECTED:
1540                         case self::AS_SUMMARY_NEEDED:
1541                         case self::AS_TEXTBOX_EMPTY:
1542                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1543                         case self::AS_END:
1544                         case self::AS_BLANK_ARTICLE:
1545                         case self::AS_SELF_REDIRECT:
1546                                 return true;
1547
1548                         case self::AS_HOOK_ERROR:
1549                                 return false;
1550
1551                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1552                         case self::AS_PARSE_ERROR:
1553                                 $out->addWikiText( '<div class="error">' . "\n" . $status->getWikiText() . '</div>' );
1554                                 return true;
1555
1556                         case self::AS_SUCCESS_NEW_ARTICLE:
1557                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1558                                 if ( $extraQueryRedirect ) {
1559                                         if ( $query === '' ) {
1560                                                 $query = $extraQueryRedirect;
1561                                         } else {
1562                                                 $query = $query . '&' . $extraQueryRedirect;
1563                                         }
1564                                 }
1565                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1566                                 $out->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1567                                 return false;
1568
1569                         case self::AS_SUCCESS_UPDATE:
1570                                 $extraQuery = '';
1571                                 $sectionanchor = $resultDetails['sectionanchor'];
1572
1573                                 // Give extensions a chance to modify URL query on update
1574                                 Hooks::run(
1575                                         'ArticleUpdateBeforeRedirect',
1576                                         [ $this->mArticle, &$sectionanchor, &$extraQuery ]
1577                                 );
1578
1579                                 if ( $resultDetails['redirect'] ) {
1580                                         if ( $extraQuery == '' ) {
1581                                                 $extraQuery = 'redirect=no';
1582                                         } else {
1583                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1584                                         }
1585                                 }
1586                                 if ( $extraQueryRedirect ) {
1587                                         if ( $extraQuery === '' ) {
1588                                                 $extraQuery = $extraQueryRedirect;
1589                                         } else {
1590                                                 $extraQuery = $extraQuery . '&' . $extraQueryRedirect;
1591                                         }
1592                                 }
1593
1594                                 $out->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1595                                 return false;
1596
1597                         case self::AS_SPAM_ERROR:
1598                                 $this->spamPageWithContent( $resultDetails['spam'] );
1599                                 return false;
1600
1601                         case self::AS_BLOCKED_PAGE_FOR_USER:
1602                                 throw new UserBlockedError( $wgUser->getBlock() );
1603
1604                         case self::AS_IMAGE_REDIRECT_ANON:
1605                         case self::AS_IMAGE_REDIRECT_LOGGED:
1606                                 throw new PermissionsError( 'upload' );
1607
1608                         case self::AS_READ_ONLY_PAGE_ANON:
1609                         case self::AS_READ_ONLY_PAGE_LOGGED:
1610                                 throw new PermissionsError( 'edit' );
1611
1612                         case self::AS_READ_ONLY_PAGE:
1613                                 throw new ReadOnlyError;
1614
1615                         case self::AS_RATE_LIMITED:
1616                                 throw new ThrottledError();
1617
1618                         case self::AS_NO_CREATE_PERMISSION:
1619                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1620                                 throw new PermissionsError( $permission );
1621
1622                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1623                                 throw new PermissionsError( 'editcontentmodel' );
1624
1625                         default:
1626                                 // We don't recognize $status->value. The only way that can happen
1627                                 // is if an extension hook aborted from inside ArticleSave.
1628                                 // Render the status object into $this->hookError
1629                                 // FIXME this sucks, we should just use the Status object throughout
1630                                 $this->hookError = '<div class="error">' ."\n" . $status->getWikiText() .
1631                                         '</div>';
1632                                 return true;
1633                 }
1634         }
1635
1636         /**
1637          * Run hooks that can filter edits just before they get saved.
1638          *
1639          * @param Content $content The Content to filter.
1640          * @param Status $status For reporting the outcome to the caller
1641          * @param User $user The user performing the edit
1642          *
1643          * @return bool
1644          */
1645         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1646                 // Run old style post-section-merge edit filter
1647                 if ( $this->hookError != '' ) {
1648                         # ...or the hook could be expecting us to produce an error
1649                         $status->fatal( 'hookaborted' );
1650                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1651                         return false;
1652                 }
1653
1654                 // Run new style post-section-merge edit filter
1655                 if ( !Hooks::run( 'EditFilterMergedContent',
1656                                 [ $this->mArticle->getContext(), $content, $status, $this->summary,
1657                                 $user, $this->minoredit ] )
1658                 ) {
1659                         # Error messages etc. could be handled within the hook...
1660                         if ( $status->isGood() ) {
1661                                 $status->fatal( 'hookaborted' );
1662                                 // Not setting $this->hookError here is a hack to allow the hook
1663                                 // to cause a return to the edit page without $this->hookError
1664                                 // being set. This is used by ConfirmEdit to display a captcha
1665                                 // without any error message cruft.
1666                         } else {
1667                                 $this->hookError = $status->getWikiText();
1668                         }
1669                         // Use the existing $status->value if the hook set it
1670                         if ( !$status->value ) {
1671                                 $status->value = self::AS_HOOK_ERROR;
1672                         }
1673                         return false;
1674                 } elseif ( !$status->isOK() ) {
1675                         # ...or the hook could be expecting us to produce an error
1676                         // FIXME this sucks, we should just use the Status object throughout
1677                         $this->hookError = $status->getWikiText();
1678                         $status->fatal( 'hookaborted' );
1679                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1680                         return false;
1681                 }
1682
1683                 return true;
1684         }
1685
1686         /**
1687          * Return the summary to be used for a new section.
1688          *
1689          * @param string $sectionanchor Set to the section anchor text
1690          * @return string
1691          */
1692         private function newSectionSummary( &$sectionanchor = null ) {
1693                 global $wgParser;
1694
1695                 if ( $this->sectiontitle !== '' ) {
1696                         $sectionanchor = $this->guessSectionName( $this->sectiontitle );
1697                         // If no edit summary was specified, create one automatically from the section
1698                         // title and have it link to the new section. Otherwise, respect the summary as
1699                         // passed.
1700                         if ( $this->summary === '' ) {
1701                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1702                                 return $this->context->msg( 'newsectionsummary' )
1703                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1704                         }
1705                 } elseif ( $this->summary !== '' ) {
1706                         $sectionanchor = $this->guessSectionName( $this->summary );
1707                         # This is a new section, so create a link to the new section
1708                         # in the revision summary.
1709                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1710                         return $this->context->msg( 'newsectionsummary' )
1711                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1712                 }
1713                 return $this->summary;
1714         }
1715
1716         /**
1717          * Attempt submission (no UI)
1718          *
1719          * @param array &$result Array to add statuses to, currently with the
1720          *   possible keys:
1721          *   - spam (string): Spam string from content if any spam is detected by
1722          *     matchSpamRegex.
1723          *   - sectionanchor (string): Section anchor for a section save.
1724          *   - nullEdit (bool): Set if doEditContent is OK.  True if null edit,
1725          *     false otherwise.
1726          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1727          *     revision is a redirect.
1728          * @param bool $bot True if edit is being made under the bot right.
1729          *
1730          * @return Status Status object, possibly with a message, but always with
1731          *   one of the AS_* constants in $status->value,
1732          *
1733          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1734          *   various error display idiosyncrasies. There are also lots of cases
1735          *   where error metadata is set in the object and retrieved later instead
1736          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1737          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1738          * time.
1739          */
1740         public function internalAttemptSave( &$result, $bot = false ) {
1741                 global $wgUser, $wgRequest, $wgMaxArticleSize;
1742                 global $wgContentHandlerUseDB;
1743
1744                 $status = Status::newGood();
1745
1746                 if ( !Hooks::run( 'EditPage::attemptSave', [ $this ] ) ) {
1747                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1748                         $status->fatal( 'hookaborted' );
1749                         $status->value = self::AS_HOOK_ERROR;
1750                         return $status;
1751                 }
1752
1753                 $spam = $wgRequest->getText( 'wpAntispam' );
1754                 if ( $spam !== '' ) {
1755                         wfDebugLog(
1756                                 'SimpleAntiSpam',
1757                                 $wgUser->getName() .
1758                                 ' editing "' .
1759                                 $this->mTitle->getPrefixedText() .
1760                                 '" submitted bogus field "' .
1761                                 $spam .
1762                                 '"'
1763                         );
1764                         $status->fatal( 'spamprotectionmatch', false );
1765                         $status->value = self::AS_SPAM_ERROR;
1766                         return $status;
1767                 }
1768
1769                 try {
1770                         # Construct Content object
1771                         $textbox_content = $this->toEditContent( $this->textbox1 );
1772                 } catch ( MWContentSerializationException $ex ) {
1773                         $status->fatal(
1774                                 'content-failed-to-parse',
1775                                 $this->contentModel,
1776                                 $this->contentFormat,
1777                                 $ex->getMessage()
1778                         );
1779                         $status->value = self::AS_PARSE_ERROR;
1780                         return $status;
1781                 }
1782
1783                 # Check image redirect
1784                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1785                         $textbox_content->isRedirect() &&
1786                         !$wgUser->isAllowed( 'upload' )
1787                 ) {
1788                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1789                                 $status->setResult( false, $code );
1790
1791                                 return $status;
1792                 }
1793
1794                 # Check for spam
1795                 $match = self::matchSummarySpamRegex( $this->summary );
1796                 if ( $match === false && $this->section == 'new' ) {
1797                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1798                         # regular summaries, it is added to the actual wikitext.
1799                         if ( $this->sectiontitle !== '' ) {
1800                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1801                                 $match = self::matchSpamRegex( $this->sectiontitle );
1802                         } else {
1803                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1804                                 # is used with the 'summary' parameter.
1805                                 $match = self::matchSpamRegex( $this->summary );
1806                         }
1807                 }
1808                 if ( $match === false ) {
1809                         $match = self::matchSpamRegex( $this->textbox1 );
1810                 }
1811                 if ( $match !== false ) {
1812                         $result['spam'] = $match;
1813                         $ip = $wgRequest->getIP();
1814                         $pdbk = $this->mTitle->getPrefixedDBkey();
1815                         $match = str_replace( "\n", '', $match );
1816                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1817                         $status->fatal( 'spamprotectionmatch', $match );
1818                         $status->value = self::AS_SPAM_ERROR;
1819                         return $status;
1820                 }
1821                 if ( !Hooks::run(
1822                         'EditFilter',
1823                         [ $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ] )
1824                 ) {
1825                         # Error messages etc. could be handled within the hook...
1826                         $status->fatal( 'hookaborted' );
1827                         $status->value = self::AS_HOOK_ERROR;
1828                         return $status;
1829                 } elseif ( $this->hookError != '' ) {
1830                         # ...or the hook could be expecting us to produce an error
1831                         $status->fatal( 'hookaborted' );
1832                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1833                         return $status;
1834                 }
1835
1836                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1837                         // Auto-block user's IP if the account was "hard" blocked
1838                         if ( !wfReadOnly() ) {
1839                                 $wgUser->spreadAnyEditBlock();
1840                         }
1841                         # Check block state against master, thus 'false'.
1842                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1843                         return $status;
1844                 }
1845
1846                 $this->contentLength = strlen( $this->textbox1 );
1847                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
1848                         // Error will be displayed by showEditForm()
1849                         $this->tooBig = true;
1850                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1851                         return $status;
1852                 }
1853
1854                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1855                         if ( $wgUser->isAnon() ) {
1856                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1857                                 return $status;
1858                         } else {
1859                                 $status->fatal( 'readonlytext' );
1860                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1861                                 return $status;
1862                         }
1863                 }
1864
1865                 $changingContentModel = false;
1866                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1867                         if ( !$wgContentHandlerUseDB ) {
1868                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1869                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1870                                 return $status;
1871                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1872                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1873                                 return $status;
1874                         }
1875                         // Make sure the user can edit the page under the new content model too
1876                         $titleWithNewContentModel = clone $this->mTitle;
1877                         $titleWithNewContentModel->setContentModel( $this->contentModel );
1878                         if ( !$titleWithNewContentModel->userCan( 'editcontentmodel', $wgUser )
1879                                 || !$titleWithNewContentModel->userCan( 'edit', $wgUser )
1880                         ) {
1881                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1882                                 return $status;
1883                         }
1884
1885                         $changingContentModel = true;
1886                         $oldContentModel = $this->mTitle->getContentModel();
1887                 }
1888
1889                 if ( $this->changeTags ) {
1890                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1891                                 $this->changeTags, $wgUser );
1892                         if ( !$changeTagsStatus->isOK() ) {
1893                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1894                                 return $changeTagsStatus;
1895                         }
1896                 }
1897
1898                 if ( wfReadOnly() ) {
1899                         $status->fatal( 'readonlytext' );
1900                         $status->value = self::AS_READ_ONLY_PAGE;
1901                         return $status;
1902                 }
1903                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 )
1904                         || ( $changingContentModel && $wgUser->pingLimiter( 'editcontentmodel' ) )
1905                 ) {
1906                         $status->fatal( 'actionthrottledtext' );
1907                         $status->value = self::AS_RATE_LIMITED;
1908                         return $status;
1909                 }
1910
1911                 # If the article has been deleted while editing, don't save it without
1912                 # confirmation
1913                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1914                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1915                         return $status;
1916                 }
1917
1918                 # Load the page data from the master. If anything changes in the meantime,
1919                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1920                 $this->page->loadPageData( 'fromdbmaster' );
1921                 $new = !$this->page->exists();
1922
1923                 if ( $new ) {
1924                         // Late check for create permission, just in case *PARANOIA*
1925                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1926                                 $status->fatal( 'nocreatetext' );
1927                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1928                                 wfDebug( __METHOD__ . ": no create permission\n" );
1929                                 return $status;
1930                         }
1931
1932                         // Don't save a new page if it's blank or if it's a MediaWiki:
1933                         // message with content equivalent to default (allow empty pages
1934                         // in this case to disable messages, see T52124)
1935                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1936                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1937                                 $defaultText = $defaultMessageText;
1938                         } else {
1939                                 $defaultText = '';
1940                         }
1941
1942                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1943                                 $this->blankArticle = true;
1944                                 $status->fatal( 'blankarticle' );
1945                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1946                                 return $status;
1947                         }
1948
1949                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1950                                 return $status;
1951                         }
1952
1953                         $content = $textbox_content;
1954
1955                         $result['sectionanchor'] = '';
1956                         if ( $this->section == 'new' ) {
1957                                 if ( $this->sectiontitle !== '' ) {
1958                                         // Insert the section title above the content.
1959                                         $content = $content->addSectionHeader( $this->sectiontitle );
1960                                 } elseif ( $this->summary !== '' ) {
1961                                         // Insert the section title above the content.
1962                                         $content = $content->addSectionHeader( $this->summary );
1963                                 }
1964                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1965                         }
1966
1967                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1968
1969                 } else { # not $new
1970
1971                         # Article exists. Check for edit conflict.
1972
1973                         $this->page->clear(); # Force reload of dates, etc.
1974                         $timestamp = $this->page->getTimestamp();
1975                         $latest = $this->page->getLatest();
1976
1977                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1978
1979                         // Check editRevId if set, which handles same-second timestamp collisions
1980                         if ( $timestamp != $this->edittime
1981                                 || ( $this->editRevId !== null && $this->editRevId != $latest )
1982                         ) {
1983                                 $this->isConflict = true;
1984                                 if ( $this->section == 'new' ) {
1985                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1986                                                 $this->page->getComment() == $this->newSectionSummary()
1987                                         ) {
1988                                                 // Probably a duplicate submission of a new comment.
1989                                                 // This can happen when CDN resends a request after
1990                                                 // a timeout but the first one actually went through.
1991                                                 wfDebug( __METHOD__
1992                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1993                                         } else {
1994                                                 // New comment; suppress conflict.
1995                                                 $this->isConflict = false;
1996                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1997                                         }
1998                                 } elseif ( $this->section == ''
1999                                         && Revision::userWasLastToEdit(
2000                                                 DB_MASTER, $this->mTitle->getArticleID(),
2001                                                 $wgUser->getId(), $this->edittime
2002                                         )
2003                                 ) {
2004                                         # Suppress edit conflict with self, except for section edits where merging is required.
2005                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
2006                                         $this->isConflict = false;
2007                                 }
2008                         }
2009
2010                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
2011                         if ( $this->sectiontitle !== '' ) {
2012                                 $sectionTitle = $this->sectiontitle;
2013                         } else {
2014                                 $sectionTitle = $this->summary;
2015                         }
2016
2017                         $content = null;
2018
2019                         if ( $this->isConflict ) {
2020                                 wfDebug( __METHOD__
2021                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
2022                                         . " (id '{$this->editRevId}') (article time '{$timestamp}')\n" );
2023                                 // @TODO: replaceSectionAtRev() with base ID (not prior current) for ?oldid=X case
2024                                 // ...or disable section editing for non-current revisions (not exposed anyway).
2025                                 if ( $this->editRevId !== null ) {
2026                                         $content = $this->page->replaceSectionAtRev(
2027                                                 $this->section,
2028                                                 $textbox_content,
2029                                                 $sectionTitle,
2030                                                 $this->editRevId
2031                                         );
2032                                 } else {
2033                                         $content = $this->page->replaceSectionContent(
2034                                                 $this->section,
2035                                                 $textbox_content,
2036                                                 $sectionTitle,
2037                                                 $this->edittime
2038                                         );
2039                                 }
2040                         } else {
2041                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
2042                                 $content = $this->page->replaceSectionContent(
2043                                         $this->section,
2044                                         $textbox_content,
2045                                         $sectionTitle
2046                                 );
2047                         }
2048
2049                         if ( is_null( $content ) ) {
2050                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
2051                                 $this->isConflict = true;
2052                                 $content = $textbox_content; // do not try to merge here!
2053                         } elseif ( $this->isConflict ) {
2054                                 # Attempt merge
2055                                 if ( $this->mergeChangesIntoContent( $content ) ) {
2056                                         // Successful merge! Maybe we should tell the user the good news?
2057                                         $this->isConflict = false;
2058                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
2059                                 } else {
2060                                         $this->section = '';
2061                                         $this->textbox1 = ContentHandler::getContentText( $content );
2062                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
2063                                 }
2064                         }
2065
2066                         if ( $this->isConflict ) {
2067                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
2068                                 return $status;
2069                         }
2070
2071                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
2072                                 return $status;
2073                         }
2074
2075                         if ( $this->section == 'new' ) {
2076                                 // Handle the user preference to force summaries here
2077                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
2078                                         $this->missingSummary = true;
2079                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
2080                                         $status->value = self::AS_SUMMARY_NEEDED;
2081                                         return $status;
2082                                 }
2083
2084                                 // Do not allow the user to post an empty comment
2085                                 if ( $this->textbox1 == '' ) {
2086                                         $this->missingComment = true;
2087                                         $status->fatal( 'missingcommenttext' );
2088                                         $status->value = self::AS_TEXTBOX_EMPTY;
2089                                         return $status;
2090                                 }
2091                         } elseif ( !$this->allowBlankSummary
2092                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
2093                                 && !$content->isRedirect()
2094                                 && md5( $this->summary ) == $this->autoSumm
2095                         ) {
2096                                 $this->missingSummary = true;
2097                                 $status->fatal( 'missingsummary' );
2098                                 $status->value = self::AS_SUMMARY_NEEDED;
2099                                 return $status;
2100                         }
2101
2102                         # All's well
2103                         $sectionanchor = '';
2104                         if ( $this->section == 'new' ) {
2105                                 $this->summary = $this->newSectionSummary( $sectionanchor );
2106                         } elseif ( $this->section != '' ) {
2107                                 # Try to get a section anchor from the section source, redirect
2108                                 # to edited section if header found.
2109                                 # XXX: Might be better to integrate this into Article::replaceSectionAtRev
2110                                 # for duplicate heading checking and maybe parsing.
2111                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
2112                                 # We can't deal with anchors, includes, html etc in the header for now,
2113                                 # headline would need to be parsed to improve this.
2114                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
2115                                         $sectionanchor = $this->guessSectionName( $matches[2] );
2116                                 }
2117                         }
2118                         $result['sectionanchor'] = $sectionanchor;
2119
2120                         // Save errors may fall down to the edit form, but we've now
2121                         // merged the section into full text. Clear the section field
2122                         // so that later submission of conflict forms won't try to
2123                         // replace that into a duplicated mess.
2124                         $this->textbox1 = $this->toEditText( $content );
2125                         $this->section = '';
2126
2127                         $status->value = self::AS_SUCCESS_UPDATE;
2128                 }
2129
2130                 if ( !$this->allowSelfRedirect
2131                         && $content->isRedirect()
2132                         && $content->getRedirectTarget()->equals( $this->getTitle() )
2133                 ) {
2134                         // If the page already redirects to itself, don't warn.
2135                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
2136                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
2137                                 $this->selfRedirect = true;
2138                                 $status->fatal( 'selfredirect' );
2139                                 $status->value = self::AS_SELF_REDIRECT;
2140                                 return $status;
2141                         }
2142                 }
2143
2144                 // Check for length errors again now that the section is merged in
2145                 $this->contentLength = strlen( $this->toEditText( $content ) );
2146                 if ( $this->contentLength > $wgMaxArticleSize * 1024 ) {
2147                         $this->tooBig = true;
2148                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
2149                         return $status;
2150                 }
2151
2152                 $flags = EDIT_AUTOSUMMARY |
2153                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2154                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2155                         ( $bot ? EDIT_FORCE_BOT : 0 );
2156
2157                 $doEditStatus = $this->page->doEditContent(
2158                         $content,
2159                         $this->summary,
2160                         $flags,
2161                         false,
2162                         $wgUser,
2163                         $content->getDefaultFormat(),
2164                         $this->changeTags,
2165                         $this->undidRev
2166                 );
2167
2168                 if ( !$doEditStatus->isOK() ) {
2169                         // Failure from doEdit()
2170                         // Show the edit conflict page for certain recognized errors from doEdit(),
2171                         // but don't show it for errors from extension hooks
2172                         $errors = $doEditStatus->getErrorsArray();
2173                         if ( in_array( $errors[0][0],
2174                                         [ 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ] )
2175                         ) {
2176                                 $this->isConflict = true;
2177                                 // Destroys data doEdit() put in $status->value but who cares
2178                                 $doEditStatus->value = self::AS_END;
2179                         }
2180                         return $doEditStatus;
2181                 }
2182
2183                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2184                 if ( $result['nullEdit'] ) {
2185                         // We don't know if it was a null edit until now, so increment here
2186                         $wgUser->pingLimiter( 'linkpurge' );
2187                 }
2188                 $result['redirect'] = $content->isRedirect();
2189
2190                 $this->updateWatchlist();
2191
2192                 // If the content model changed, add a log entry
2193                 if ( $changingContentModel ) {
2194                         $this->addContentModelChangeLogEntry(
2195                                 $wgUser,
2196                                 $new ? false : $oldContentModel,
2197                                 $this->contentModel,
2198                                 $this->summary
2199                         );
2200                 }
2201
2202                 return $status;
2203         }
2204
2205         /**
2206          * @param User $user
2207          * @param string|false $oldModel false if the page is being newly created
2208          * @param string $newModel
2209          * @param string $reason
2210          */
2211         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2212                 $new = $oldModel === false;
2213                 $log = new ManualLogEntry( 'contentmodel', $new ? 'new' : 'change' );
2214                 $log->setPerformer( $user );
2215                 $log->setTarget( $this->mTitle );
2216                 $log->setComment( $reason );
2217                 $log->setParameters( [
2218                         '4::oldmodel' => $oldModel,
2219                         '5::newmodel' => $newModel
2220                 ] );
2221                 $logid = $log->insert();
2222                 $log->publish( $logid );
2223         }
2224
2225         /**
2226          * Register the change of watch status
2227          */
2228         protected function updateWatchlist() {
2229                 global $wgUser;
2230
2231                 if ( !$wgUser->isLoggedIn() ) {
2232                         return;
2233                 }
2234
2235                 $user = $wgUser;
2236                 $title = $this->mTitle;
2237                 $watch = $this->watchthis;
2238                 // Do this in its own transaction to reduce contention...
2239                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2240                         if ( $watch == $user->isWatched( $title, User::IGNORE_USER_RIGHTS ) ) {
2241                                 return; // nothing to change
2242                         }
2243                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2244                 } );
2245         }
2246
2247         /**
2248          * Attempts to do 3-way merge of edit content with a base revision
2249          * and current content, in case of edit conflict, in whichever way appropriate
2250          * for the content type.
2251          *
2252          * @since 1.21
2253          *
2254          * @param Content $editContent
2255          *
2256          * @return bool
2257          */
2258         private function mergeChangesIntoContent( &$editContent ) {
2259                 $db = wfGetDB( DB_MASTER );
2260
2261                 // This is the revision the editor started from
2262                 $baseRevision = $this->getBaseRevision();
2263                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2264
2265                 if ( is_null( $baseContent ) ) {
2266                         return false;
2267                 }
2268
2269                 // The current state, we want to merge updates into it
2270                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2271                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2272
2273                 if ( is_null( $currentContent ) ) {
2274                         return false;
2275                 }
2276
2277                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2278
2279                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2280
2281                 if ( $result ) {
2282                         $editContent = $result;
2283                         // Update parentRevId to what we just merged.
2284                         $this->parentRevId = $currentRevision->getId();
2285                         return true;
2286                 }
2287
2288                 return false;
2289         }
2290
2291         /**
2292          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2293          *        one might think of X as the "base revision", which is NOT what this returns.
2294          * @return Revision Current version when the edit was started
2295          */
2296         public function getBaseRevision() {
2297                 if ( !$this->mBaseRevision ) {
2298                         $db = wfGetDB( DB_MASTER );
2299                         $this->mBaseRevision = $this->editRevId
2300                                 ? Revision::newFromId( $this->editRevId, Revision::READ_LATEST )
2301                                 : Revision::loadFromTimestamp( $db, $this->mTitle, $this->edittime );
2302                 }
2303                 return $this->mBaseRevision;
2304         }
2305
2306         /**
2307          * Check given input text against $wgSpamRegex, and return the text of the first match.
2308          *
2309          * @param string $text
2310          *
2311          * @return string|bool Matching string or false
2312          */
2313         public static function matchSpamRegex( $text ) {
2314                 global $wgSpamRegex;
2315                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2316                 $regexes = (array)$wgSpamRegex;
2317                 return self::matchSpamRegexInternal( $text, $regexes );
2318         }
2319
2320         /**
2321          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2322          *
2323          * @param string $text
2324          *
2325          * @return string|bool Matching string or false
2326          */
2327         public static function matchSummarySpamRegex( $text ) {
2328                 global $wgSummarySpamRegex;
2329                 $regexes = (array)$wgSummarySpamRegex;
2330                 return self::matchSpamRegexInternal( $text, $regexes );
2331         }
2332
2333         /**
2334          * @param string $text
2335          * @param array $regexes
2336          * @return bool|string
2337          */
2338         protected static function matchSpamRegexInternal( $text, $regexes ) {
2339                 foreach ( $regexes as $regex ) {
2340                         $matches = [];
2341                         if ( preg_match( $regex, $text, $matches ) ) {
2342                                 return $matches[0];
2343                         }
2344                 }
2345                 return false;
2346         }
2347
2348         public function setHeaders() {
2349                 global $wgUser, $wgAjaxEditStash;
2350
2351                 $out = $this->context->getOutput();
2352
2353                 $out->addModules( 'mediawiki.action.edit' );
2354                 $out->addModuleStyles( 'mediawiki.action.edit.styles' );
2355
2356                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2357                         // The addition of default buttons is handled by getEditToolbar() which
2358                         // has its own dependency on this module. The call here ensures the module
2359                         // is loaded in time (it has position "top") for other modules to register
2360                         // buttons (e.g. extensions, gadgets, user scripts).
2361                         $out->addModules( 'mediawiki.toolbar' );
2362                 }
2363
2364                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2365                         $out->addModules( 'mediawiki.action.edit.preview' );
2366                 }
2367
2368                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2369                         $out->addModules( 'mediawiki.action.edit.editWarning' );
2370                 }
2371
2372                 # Enabled article-related sidebar, toplinks, etc.
2373                 $out->setArticleRelated( true );
2374
2375                 $contextTitle = $this->getContextTitle();
2376                 if ( $this->isConflict ) {
2377                         $msg = 'editconflict';
2378                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2379                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2380                 } else {
2381                         $msg = $contextTitle->exists()
2382                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2383                                         && $contextTitle->getDefaultMessageText() !== false
2384                                 )
2385                                 ? 'editing'
2386                                 : 'creating';
2387                 }
2388
2389                 # Use the title defined by DISPLAYTITLE magic word when present
2390                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2391                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2392                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2393                 if ( $displayTitle === false ) {
2394                         $displayTitle = $contextTitle->getPrefixedText();
2395                 }
2396                 $out->setPageTitle( $this->context->msg( $msg, $displayTitle ) );
2397                 # Transmit the name of the message to JavaScript for live preview
2398                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2399                 $out->addJsConfigVars( [
2400                         'wgEditMessage' => $msg,
2401                         'wgAjaxEditStash' => $wgAjaxEditStash,
2402                 ] );
2403         }
2404
2405         /**
2406          * Show all applicable editing introductions
2407          */
2408         protected function showIntro() {
2409                 global $wgUser;
2410                 if ( $this->suppressIntro ) {
2411                         return;
2412                 }
2413
2414                 $out = $this->context->getOutput();
2415                 $namespace = $this->mTitle->getNamespace();
2416
2417                 if ( $namespace == NS_MEDIAWIKI ) {
2418                         # Show a warning if editing an interface message
2419                         $out->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2420                         # If this is a default message (but not css or js),
2421                         # show a hint that it is translatable on translatewiki.net
2422                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2423                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2424                         ) {
2425                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2426                                 if ( $defaultMessageText !== false ) {
2427                                         $out->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2428                                                 'translateinterface' );
2429                                 }
2430                         }
2431                 } elseif ( $namespace == NS_FILE ) {
2432                         # Show a hint to shared repo
2433                         $file = wfFindFile( $this->mTitle );
2434                         if ( $file && !$file->isLocal() ) {
2435                                 $descUrl = $file->getDescriptionUrl();
2436                                 # there must be a description url to show a hint to shared repo
2437                                 if ( $descUrl ) {
2438                                         if ( !$this->mTitle->exists() ) {
2439                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", [
2440                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2441                                                 ] );
2442                                         } else {
2443                                                 $out->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", [
2444                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2445                                                 ] );
2446                                         }
2447                                 }
2448                         }
2449                 }
2450
2451                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2452                 # Show log extract when the user is currently blocked
2453                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2454                         $username = explode( '/', $this->mTitle->getText(), 2 )[0];
2455                         $user = User::newFromName( $username, false /* allow IP users */ );
2456                         $ip = User::isIP( $username );
2457                         $block = Block::newFromTarget( $user, $user );
2458                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2459                                 $out->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2460                                         [ 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ] );
2461                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2462                                 # Show log extract if the user is currently blocked
2463                                 LogEventsList::showLogExtract(
2464                                         $out,
2465                                         'block',
2466                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2467                                         '',
2468                                         [
2469                                                 'lim' => 1,
2470                                                 'showIfEmpty' => false,
2471                                                 'msgKey' => [
2472                                                         'blocked-notice-logextract',
2473                                                         $user->getName() # Support GENDER in notice
2474                                                 ]
2475                                         ]
2476                                 );
2477                         }
2478                 }
2479                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2480                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2481                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2482                                 $this->context->msg( 'helppage' )->inContentLanguage()->text()
2483                         ) );
2484                         if ( $wgUser->isLoggedIn() ) {
2485                                 $out->wrapWikiMsg(
2486                                         // Suppress the external link icon, consider the help url an internal one
2487                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2488                                         [
2489                                                 'newarticletext',
2490                                                 $helpLink
2491                                         ]
2492                                 );
2493                         } else {
2494                                 $out->wrapWikiMsg(
2495                                         // Suppress the external link icon, consider the help url an internal one
2496                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2497                                         [
2498                                                 'newarticletextanon',
2499                                                 $helpLink
2500                                         ]
2501                                 );
2502                         }
2503                 }
2504                 # Give a notice if the user is editing a deleted/moved page...
2505                 if ( !$this->mTitle->exists() ) {
2506                         $dbr = wfGetDB( DB_REPLICA );
2507
2508                         LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $this->mTitle,
2509                                 '',
2510                                 [
2511                                         'lim' => 10,
2512                                         'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
2513                                         'showIfEmpty' => false,
2514                                         'msgKey' => [ 'recreate-moveddeleted-warn' ]
2515                                 ]
2516                         );
2517                 }
2518         }
2519
2520         /**
2521          * Attempt to show a custom editing introduction, if supplied
2522          *
2523          * @return bool
2524          */
2525         protected function showCustomIntro() {
2526                 if ( $this->editintro ) {
2527                         $title = Title::newFromText( $this->editintro );
2528                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2529                                 // Added using template syntax, to take <noinclude>'s into account.
2530                                 $this->context->getOutput()->addWikiTextTitleTidy(
2531                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2532                                         $this->mTitle
2533                                 );
2534                                 return true;
2535                         }
2536                 }
2537                 return false;
2538         }
2539
2540         /**
2541          * Gets an editable textual representation of $content.
2542          * The textual representation can be turned by into a Content object by the
2543          * toEditContent() method.
2544          *
2545          * If $content is null or false or a string, $content is returned unchanged.
2546          *
2547          * If the given Content object is not of a type that can be edited using
2548          * the text base EditPage, an exception will be raised. Set
2549          * $this->allowNonTextContent to true to allow editing of non-textual
2550          * content.
2551          *
2552          * @param Content|null|bool|string $content
2553          * @return string The editable text form of the content.
2554          *
2555          * @throws MWException If $content is not an instance of TextContent and
2556          *   $this->allowNonTextContent is not true.
2557          */
2558         protected function toEditText( $content ) {
2559                 if ( $content === null || $content === false || is_string( $content ) ) {
2560                         return $content;
2561                 }
2562
2563                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2564                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2565                 }
2566
2567                 return $content->serialize( $this->contentFormat );
2568         }
2569
2570         /**
2571          * Turns the given text into a Content object by unserializing it.
2572          *
2573          * If the resulting Content object is not of a type that can be edited using
2574          * the text base EditPage, an exception will be raised. Set
2575          * $this->allowNonTextContent to true to allow editing of non-textual
2576          * content.
2577          *
2578          * @param string|null|bool $text Text to unserialize
2579          * @return Content|bool|null The content object created from $text. If $text was false
2580          *   or null, false resp. null will be  returned instead.
2581          *
2582          * @throws MWException If unserializing the text results in a Content
2583          *   object that is not an instance of TextContent and
2584          *   $this->allowNonTextContent is not true.
2585          */
2586         protected function toEditContent( $text ) {
2587                 if ( $text === false || $text === null ) {
2588                         return $text;
2589                 }
2590
2591                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2592                         $this->contentModel, $this->contentFormat );
2593
2594                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2595                         throw new MWException( 'This content model is not supported: ' . $content->getModel() );
2596                 }
2597
2598                 return $content;
2599         }
2600
2601         /**
2602          * Send the edit form and related headers to OutputPage
2603          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2604          *     during form output near the top, for captchas and the like.
2605          *
2606          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2607          * use the EditPage::showEditForm:fields hook instead.
2608          */
2609         public function showEditForm( $formCallback = null ) {
2610                 global $wgUser;
2611
2612                 # need to parse the preview early so that we know which templates are used,
2613                 # otherwise users with "show preview after edit box" will get a blank list
2614                 # we parse this near the beginning so that setHeaders can do the title
2615                 # setting work instead of leaving it in getPreviewText
2616                 $previewOutput = '';
2617                 if ( $this->formtype == 'preview' ) {
2618                         $previewOutput = $this->getPreviewText();
2619                 }
2620
2621                 $out = $this->context->getOutput();
2622
2623                 // Avoid PHP 7.1 warning of passing $this by reference
2624                 $editPage = $this;
2625                 Hooks::run( 'EditPage::showEditForm:initial', [ &$editPage, &$out ] );
2626
2627                 $this->setHeaders();
2628
2629                 $this->addTalkPageText();
2630                 $this->addEditNotices();
2631
2632                 if ( !$this->isConflict &&
2633                         $this->section != '' &&
2634                         !$this->isSectionEditSupported() ) {
2635                         // We use $this->section to much before this and getVal('wgSection') directly in other places
2636                         // at this point we can't reset $this->section to '' to fallback to non-section editing.
2637                         // Someone is welcome to try refactoring though
2638                         $out->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2639                         return;
2640                 }
2641
2642                 $this->showHeader();
2643
2644                 $out->addHTML( $this->editFormPageTop );
2645
2646                 if ( $wgUser->getOption( 'previewontop' ) ) {
2647                         $this->displayPreviewArea( $previewOutput, true );
2648                 }
2649
2650                 $out->addHTML( $this->editFormTextTop );
2651
2652                 $showToolbar = true;
2653                 if ( $this->wasDeletedSinceLastEdit() ) {
2654                         if ( $this->formtype == 'save' ) {
2655                                 // Hide the toolbar and edit area, user can click preview to get it back
2656                                 // Add an confirmation checkbox and explanation.
2657                                 $showToolbar = false;
2658                         } else {
2659                                 $out->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2660                                         'deletedwhileediting' );
2661                         }
2662                 }
2663
2664                 // @todo add EditForm plugin interface and use it here!
2665                 //       search for textarea1 and textarea2, and allow EditForm to override all uses.
2666                 $out->addHTML( Html::openElement(
2667                         'form',
2668                         [
2669                                 'class' => 'mw-editform',
2670                                 'id' => self::EDITFORM_ID,
2671                                 'name' => self::EDITFORM_ID,
2672                                 'method' => 'post',
2673                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2674                                 'enctype' => 'multipart/form-data'
2675                         ]
2676                 ) );
2677
2678                 if ( is_callable( $formCallback ) ) {
2679                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2680                         call_user_func_array( $formCallback, [ &$out ] );
2681                 }
2682
2683                 // Add an empty field to trip up spambots
2684                 $out->addHTML(
2685                         Xml::openElement( 'div', [ 'id' => 'antispam-container', 'style' => 'display: none;' ] )
2686                         . Html::rawElement(
2687                                 'label',
2688                                 [ 'for' => 'wpAntispam' ],
2689                                 $this->context->msg( 'simpleantispam-label' )->parse()
2690                         )
2691                         . Xml::element(
2692                                 'input',
2693                                 [
2694                                         'type' => 'text',
2695                                         'name' => 'wpAntispam',
2696                                         'id' => 'wpAntispam',
2697                                         'value' => ''
2698                                 ]
2699                         )
2700                         . Xml::closeElement( 'div' )
2701                 );
2702
2703                 // Avoid PHP 7.1 warning of passing $this by reference
2704                 $editPage = $this;
2705                 Hooks::run( 'EditPage::showEditForm:fields', [ &$editPage, &$out ] );
2706
2707                 // Put these up at the top to ensure they aren't lost on early form submission
2708                 $this->showFormBeforeText();
2709
2710                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2711                         $username = $this->lastDelete->user_name;
2712                         $comment = CommentStore::newKey( 'log_comment' )->getComment( $this->lastDelete )->text;
2713
2714                         // It is better to not parse the comment at all than to have templates expanded in the middle
2715                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2716                         $key = $comment === ''
2717                                 ? 'confirmrecreate-noreason'
2718                                 : 'confirmrecreate';
2719                         $out->addHTML(
2720                                 '<div class="mw-confirm-recreate">' .
2721                                         $this->context->msg( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2722                                 Xml::checkLabel( $this->context->msg( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2723                                         [ 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' ]
2724                                 ) .
2725                                 '</div>'
2726                         );
2727                 }
2728
2729                 # When the summary is hidden, also hide them on preview/show changes
2730                 if ( $this->nosummary ) {
2731                         $out->addHTML( Html::hidden( 'nosummary', true ) );
2732                 }
2733
2734                 # If a blank edit summary was previously provided, and the appropriate
2735                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2736                 # user being bounced back more than once in the event that a summary
2737                 # is not required.
2738                 # ####
2739                 # For a bit more sophisticated detection of blank summaries, hash the
2740                 # automatic one and pass that in the hidden field wpAutoSummary.
2741                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2742                         $out->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2743                 }
2744
2745                 if ( $this->undidRev ) {
2746                         $out->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2747                 }
2748
2749                 if ( $this->selfRedirect ) {
2750                         $out->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2751                 }
2752
2753                 if ( $this->hasPresetSummary ) {
2754                         // If a summary has been preset using &summary= we don't want to prompt for
2755                         // a different summary. Only prompt for a summary if the summary is blanked.
2756                         // (T19416)
2757                         $this->autoSumm = md5( '' );
2758                 }
2759
2760                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2761                 $out->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2762
2763                 $out->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2764                 $out->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2765
2766                 $out->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2767                 $out->addHTML( Html::hidden( 'model', $this->contentModel ) );
2768
2769                 $out->enableOOUI();
2770
2771                 if ( $this->section == 'new' ) {
2772                         $this->showSummaryInput( true, $this->summary );
2773                         $out->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2774                 }
2775
2776                 $out->addHTML( $this->editFormTextBeforeContent );
2777
2778                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2779                         $out->addHTML( self::getEditToolbar( $this->mTitle ) );
2780                 }
2781
2782                 if ( $this->blankArticle ) {
2783                         $out->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2784                 }
2785
2786                 if ( $this->isConflict ) {
2787                         // In an edit conflict bypass the overridable content form method
2788                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2789                         // resolved between page source edits and custom ui edits using the
2790                         // custom edit ui.
2791                         $this->textbox2 = $this->textbox1;
2792
2793                         $content = $this->getCurrentContent();
2794                         $this->textbox1 = $this->toEditText( $content );
2795
2796                         $this->showTextbox1();
2797                 } else {
2798                         $this->showContentForm();
2799                 }
2800
2801                 $out->addHTML( $this->editFormTextAfterContent );
2802
2803                 $this->showStandardInputs();
2804
2805                 $this->showFormAfterText();
2806
2807                 $this->showTosSummary();
2808
2809                 $this->showEditTools();
2810
2811                 $out->addHTML( $this->editFormTextAfterTools . "\n" );
2812
2813                 $out->addHTML( $this->makeTemplatesOnThisPageList( $this->getTemplates() ) );
2814
2815                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'hiddencats' ],
2816                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2817
2818                 $out->addHTML( Html::rawElement( 'div', [ 'class' => 'limitreport' ],
2819                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2820
2821                 $out->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2822
2823                 if ( $this->isConflict ) {
2824                         try {
2825                                 $this->showConflict();
2826                         } catch ( MWContentSerializationException $ex ) {
2827                                 // this can't really happen, but be nice if it does.
2828                                 $msg = $this->context->msg(
2829                                         'content-failed-to-parse',
2830                                         $this->contentModel,
2831                                         $this->contentFormat,
2832                                         $ex->getMessage()
2833                                 );
2834                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2835                         }
2836                 }
2837
2838                 // Set a hidden field so JS knows what edit form mode we are in
2839                 if ( $this->isConflict ) {
2840                         $mode = 'conflict';
2841                 } elseif ( $this->preview ) {
2842                         $mode = 'preview';
2843                 } elseif ( $this->diff ) {
2844                         $mode = 'diff';
2845                 } else {
2846                         $mode = 'text';
2847                 }
2848                 $out->addHTML( Html::hidden( 'mode', $mode, [ 'id' => 'mw-edit-mode' ] ) );
2849
2850                 // Marker for detecting truncated form data.  This must be the last
2851                 // parameter sent in order to be of use, so do not move me.
2852                 $out->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2853                 $out->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2854
2855                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2856                         $this->displayPreviewArea( $previewOutput, false );
2857                 }
2858         }
2859
2860         /**
2861          * Wrapper around TemplatesOnThisPageFormatter to make
2862          * a "templates on this page" list.
2863          *
2864          * @param Title[] $templates
2865          * @return string HTML
2866          */
2867         public function makeTemplatesOnThisPageList( array $templates ) {
2868                 $templateListFormatter = new TemplatesOnThisPageFormatter(
2869                         $this->context, MediaWikiServices::getInstance()->getLinkRenderer()
2870                 );
2871
2872                 // preview if preview, else section if section, else false
2873                 $type = false;
2874                 if ( $this->preview ) {
2875                         $type = 'preview';
2876                 } elseif ( $this->section != '' ) {
2877                         $type = 'section';
2878                 }
2879
2880                 return Html::rawElement( 'div', [ 'class' => 'templatesUsed' ],
2881                         $templateListFormatter->format( $templates, $type )
2882                 );
2883         }
2884
2885         /**
2886          * Extract the section title from current section text, if any.
2887          *
2888          * @param string $text
2889          * @return string|bool String or false
2890          */
2891         public static function extractSectionTitle( $text ) {
2892                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2893                 if ( !empty( $matches[2] ) ) {
2894                         global $wgParser;
2895                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2896                 } else {
2897                         return false;
2898                 }
2899         }
2900
2901         protected function showHeader() {
2902                 global $wgUser;
2903                 global $wgAllowUserCss, $wgAllowUserJs;
2904
2905                 $out = $this->context->getOutput();
2906                 if ( $this->isConflict ) {
2907                         $this->addExplainConflictHeader( $out );
2908                         $this->editRevId = $this->page->getLatest();
2909                 } else {
2910                         if ( $this->section != '' && $this->section != 'new' ) {
2911                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2912                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2913                                         if ( $sectionTitle !== false ) {
2914                                                 $this->summary = "/* $sectionTitle */ ";
2915                                         }
2916                                 }
2917                         }
2918
2919                         $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
2920
2921                         if ( $this->missingComment ) {
2922                                 $out->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2923                         }
2924
2925                         if ( $this->missingSummary && $this->section != 'new' ) {
2926                                 $out->wrapWikiMsg(
2927                                         "<div id='mw-missingsummary'>\n$1\n</div>",
2928                                         [ 'missingsummary', $buttonLabel ]
2929                                 );
2930                         }
2931
2932                         if ( $this->missingSummary && $this->section == 'new' ) {
2933                                 $out->wrapWikiMsg(
2934                                         "<div id='mw-missingcommentheader'>\n$1\n</div>",
2935                                         [ 'missingcommentheader', $buttonLabel ]
2936                                 );
2937                         }
2938
2939                         if ( $this->blankArticle ) {
2940                                 $out->wrapWikiMsg(
2941                                         "<div id='mw-blankarticle'>\n$1\n</div>",
2942                                         [ 'blankarticle', $buttonLabel ]
2943                                 );
2944                         }
2945
2946                         if ( $this->selfRedirect ) {
2947                                 $out->wrapWikiMsg(
2948                                         "<div id='mw-selfredirect'>\n$1\n</div>",
2949                                         [ 'selfredirect', $buttonLabel ]
2950                                 );
2951                         }
2952
2953                         if ( $this->hookError !== '' ) {
2954                                 $out->addWikiText( $this->hookError );
2955                         }
2956
2957                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2958                                 $out->addWikiMsg( 'nonunicodebrowser' );
2959                         }
2960
2961                         if ( $this->section != 'new' ) {
2962                                 $revision = $this->mArticle->getRevisionFetched();
2963                                 if ( $revision ) {
2964                                         // Let sysop know that this will make private content public if saved
2965
2966                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2967                                                 $out->wrapWikiMsg(
2968                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2969                                                         'rev-deleted-text-permission'
2970                                                 );
2971                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2972                                                 $out->wrapWikiMsg(
2973                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2974                                                         'rev-deleted-text-view'
2975                                                 );
2976                                         }
2977
2978                                         if ( !$revision->isCurrent() ) {
2979                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2980                                                 $out->addWikiMsg( 'editingold' );
2981                                                 $this->isOldRev = true;
2982                                         }
2983                                 } elseif ( $this->mTitle->exists() ) {
2984                                         // Something went wrong
2985
2986                                         $out->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2987                                                 [ 'missing-revision', $this->oldid ] );
2988                                 }
2989                         }
2990                 }
2991
2992                 if ( wfReadOnly() ) {
2993                         $out->wrapWikiMsg(
2994                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2995                                 [ 'readonlywarning', wfReadOnlyReason() ]
2996                         );
2997                 } elseif ( $wgUser->isAnon() ) {
2998                         if ( $this->formtype != 'preview' ) {
2999                                 $out->wrapWikiMsg(
3000                                         "<div id='mw-anon-edit-warning' class='warningbox'>\n$1\n</div>",
3001                                         [ 'anoneditwarning',
3002                                                 // Log-in link
3003                                                 SpecialPage::getTitleFor( 'Userlogin' )->getFullURL( [
3004                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3005                                                 ] ),
3006                                                 // Sign-up link
3007                                                 SpecialPage::getTitleFor( 'CreateAccount' )->getFullURL( [
3008                                                         'returnto' => $this->getTitle()->getPrefixedDBkey()
3009                                                 ] )
3010                                         ]
3011                                 );
3012                         } else {
3013                                 $out->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\" class=\"warningbox\">\n$1</div>",
3014                                         'anonpreviewwarning'
3015                                 );
3016                         }
3017                 } else {
3018                         if ( $this->isCssJsSubpage ) {
3019                                 # Check the skin exists
3020                                 if ( $this->isWrongCaseCssJsPage ) {
3021                                         $out->wrapWikiMsg(
3022                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
3023                                                 [ 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ]
3024                                         );
3025                                 }
3026                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
3027                                         $out->wrapWikiMsg( '<div class="mw-usercssjspublic">$1</div>',
3028                                                 $this->isCssSubpage ? 'usercssispublic' : 'userjsispublic'
3029                                         );
3030                                         if ( $this->formtype !== 'preview' ) {
3031                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
3032                                                         $out->wrapWikiMsg(
3033                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
3034                                                                 [ 'usercssyoucanpreview' ]
3035                                                         );
3036                                                 }
3037
3038                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
3039                                                         $out->wrapWikiMsg(
3040                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
3041                                                                 [ 'userjsyoucanpreview' ]
3042                                                         );
3043                                                 }
3044                                         }
3045                                 }
3046                         }
3047                 }
3048
3049                 $this->addPageProtectionWarningHeaders();
3050
3051                 $this->addLongPageWarningHeader();
3052
3053                 # Add header copyright warning
3054                 $this->showHeaderCopyrightWarning();
3055         }
3056
3057         /**
3058          * Helper function for summary input functions, which returns the neccessary
3059          * attributes for the input.
3060          *
3061          * @param array|null $inputAttrs Array of attrs to use on the input
3062          * @return array
3063          */
3064         private function getSummaryInputAttributes( array $inputAttrs = null ) {
3065                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
3066                 return ( is_array( $inputAttrs ) ? $inputAttrs : [] ) + [
3067                         'id' => 'wpSummary',
3068                         'name' => 'wpSummary',
3069                         'maxlength' => '200',
3070                         'tabindex' => 1,
3071                         'size' => 60,
3072                         'spellcheck' => 'true',
3073                 ];
3074         }
3075
3076         /**
3077          * Standard summary input and label (wgSummary), abstracted so EditPage
3078          * subclasses may reorganize the form.
3079          * Note that you do not need to worry about the label's for=, it will be
3080          * inferred by the id given to the input. You can remove them both by
3081          * passing [ 'id' => false ] to $userInputAttrs.
3082          *
3083          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3084          * @param string $summary The value of the summary input
3085          * @param string $labelText The html to place inside the label
3086          * @param array $inputAttrs Array of attrs to use on the input
3087          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
3088          * @return array An array in the format [ $label, $input ]
3089          */
3090         public function getSummaryInput( $summary = "", $labelText = null,
3091                 $inputAttrs = null, $spanLabelAttrs = null
3092         ) {
3093                 wfDeprecated( __METHOD__, '1.30' );
3094                 $inputAttrs = $this->getSummaryInputAttributes( $inputAttrs );
3095                 $inputAttrs += Linker::tooltipAndAccesskeyAttribs( 'summary' );
3096
3097                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : [] ) + [
3098                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
3099                         'id' => "wpSummaryLabel"
3100                 ];
3101
3102                 $label = null;
3103                 if ( $labelText ) {
3104                         $label = Xml::tags(
3105                                 'label',
3106                                 $inputAttrs['id'] ? [ 'for' => $inputAttrs['id'] ] : null,
3107                                 $labelText
3108                         );
3109                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
3110                 }
3111
3112                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
3113
3114                 return [ $label, $input ];
3115         }
3116
3117         /**
3118          * Builds a standard summary input with a label.
3119          *
3120          * @deprecated since 1.30 Use getSummaryInputWidget() instead
3121          * @param string $summary The value of the summary input
3122          * @param string $labelText The html to place inside the label
3123          * @param array $inputAttrs Array of attrs to use on the input
3124          *
3125          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3126          */
3127         function getSummaryInputOOUI( $summary = "", $labelText = null, $inputAttrs = null ) {
3128                 wfDeprecated( __METHOD__, '1.30' );
3129                 $this->getSummaryInputWidget( $summary, $labelText, $inputAttrs );
3130         }
3131
3132         /**
3133          * Builds a standard summary input with a label.
3134          *
3135          * @param string $summary The value of the summary input
3136          * @param string $labelText The html to place inside the label
3137          * @param array $inputAttrs Array of attrs to use on the input
3138          *
3139          * @return OOUI\FieldLayout OOUI FieldLayout with Label and Input
3140          */
3141         function getSummaryInputWidget( $summary = "", $labelText = null, $inputAttrs = null ) {
3142                 $inputAttrs = OOUI\Element::configFromHtmlAttributes(
3143                         $this->getSummaryInputAttributes( $inputAttrs )
3144                 );
3145                 $inputAttrs += [
3146                         'title' => Linker::titleAttrib( 'summary' ),
3147                         'accessKey' => Linker::accesskey( 'summary' ),
3148                 ];
3149
3150                 // For compatibility with old scripts and extensions, we want the legacy 'id' on the `<input>`
3151                 $inputAttrs['inputId'] = $inputAttrs['id'];
3152                 $inputAttrs['id'] = 'wpSummaryWidget';
3153
3154                 return new OOUI\FieldLayout(
3155                         new OOUI\TextInputWidget( [
3156                                 'value' => $summary,
3157                                 'infusable' => true,
3158                         ] + $inputAttrs ),
3159                         [
3160                                 'label' => new OOUI\HtmlSnippet( $labelText ),
3161                                 'align' => 'top',
3162                                 'id' => 'wpSummaryLabel',
3163                                 'classes' => [ $this->missingSummary ? 'mw-summarymissed' : 'mw-summary' ],
3164                         ]
3165                 );
3166         }
3167
3168         /**
3169          * @param bool $isSubjectPreview True if this is the section subject/title
3170          *   up top, or false if this is the comment summary
3171          *   down below the textarea
3172          * @param string $summary The text of the summary to display
3173          */
3174         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
3175                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
3176                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
3177                 if ( $isSubjectPreview ) {
3178                         if ( $this->nosummary ) {
3179                                 return;
3180                         }
3181                 } else {
3182                         if ( !$this->mShowSummaryField ) {
3183                                 return;
3184                         }
3185                 }
3186
3187                 $labelText = $this->context->msg( $isSubjectPreview ? 'subject' : 'summary' )->parse();
3188                 $this->context->getOutput()->addHTML( $this->getSummaryInputWidget(
3189                                 $summary,
3190                                 $labelText,
3191                                 [ 'class' => $summaryClass ]
3192                         ) );
3193         }
3194
3195         /**
3196          * @param bool $isSubjectPreview True if this is the section subject/title
3197          *   up top, or false if this is the comment summary
3198          *   down below the textarea
3199          * @param string $summary The text of the summary to display
3200          * @return string
3201          */
3202         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3203                 // avoid spaces in preview, gets always trimmed on save
3204                 $summary = trim( $summary );
3205                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3206                         return "";
3207                 }
3208
3209                 global $wgParser;
3210
3211                 if ( $isSubjectPreview ) {
3212                         $summary = $this->context->msg( 'newsectionsummary' )
3213                                 ->rawParams( $wgParser->stripSectionName( $summary ) )
3214                                 ->inContentLanguage()->text();
3215                 }
3216
3217                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3218
3219                 $summary = $this->context->msg( $message )->parse()
3220                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3221                 return Xml::tags( 'div', [ 'class' => 'mw-summary-preview' ], $summary );
3222         }
3223
3224         protected function showFormBeforeText() {
3225                 $out = $this->context->getOutput();
3226                 $out->addHTML( Html::hidden( 'wpSection', htmlspecialchars( $this->section ) ) );
3227                 $out->addHTML( Html::hidden( 'wpStarttime', $this->starttime ) );
3228                 $out->addHTML( Html::hidden( 'wpEdittime', $this->edittime ) );
3229                 $out->addHTML( Html::hidden( 'editRevId', $this->editRevId ) );
3230                 $out->addHTML( Html::hidden( 'wpScrolltop', $this->scrolltop, [ 'id' => 'wpScrolltop' ] ) );
3231
3232                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3233                         $out->addHTML( Html::hidden( 'safemode', '1' ) );
3234                 }
3235         }
3236
3237         protected function showFormAfterText() {
3238                 global $wgUser;
3239                 /**
3240                  * To make it harder for someone to slip a user a page
3241                  * which submits an edit form to the wiki without their
3242                  * knowledge, a random token is associated with the login
3243                  * session. If it's not passed back with the submission,
3244                  * we won't save the page, or render user JavaScript and
3245                  * CSS previews.
3246                  *
3247                  * For anon editors, who may not have a session, we just
3248                  * include the constant suffix to prevent editing from
3249                  * broken text-mangling proxies.
3250                  */
3251                 $this->context->getOutput()->addHTML(
3252                         "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n"
3253                 );
3254         }
3255
3256         /**
3257          * Subpage overridable method for printing the form for page content editing
3258          * By default this simply outputs wpTextbox1
3259          * Subclasses can override this to provide a custom UI for editing;
3260          * be it a form, or simply wpTextbox1 with a modified content that will be
3261          * reverse modified when extracted from the post data.
3262          * Note that this is basically the inverse for importContentFormData
3263          */
3264         protected function showContentForm() {
3265                 $this->showTextbox1();
3266         }
3267
3268         /**
3269          * Method to output wpTextbox1
3270          * The $textoverride method can be used by subclasses overriding showContentForm
3271          * to pass back to this method.
3272          *
3273          * @param array $customAttribs Array of html attributes to use in the textarea
3274          * @param string $textoverride Optional text to override $this->textarea1 with
3275          */
3276         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3277                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3278                         $attribs = [ 'style' => 'display:none;' ];
3279                 } else {
3280                         $classes = []; // Textarea CSS
3281                         if ( $this->mTitle->isProtected( 'edit' ) &&
3282                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
3283                         ) {
3284                                 # Is the title semi-protected?
3285                                 if ( $this->mTitle->isSemiProtected() ) {
3286                                         $classes[] = 'mw-textarea-sprotected';
3287                                 } else {
3288                                         # Then it must be protected based on static groups (regular)
3289                                         $classes[] = 'mw-textarea-protected';
3290                                 }
3291                                 # Is the title cascade-protected?
3292                                 if ( $this->mTitle->isCascadeProtected() ) {
3293                                         $classes[] = 'mw-textarea-cprotected';
3294                                 }
3295                         }
3296                         # Is an old revision being edited?
3297                         if ( $this->isOldRev ) {
3298                                 $classes[] = 'mw-textarea-oldrev';
3299                         }
3300
3301                         $attribs = [ 'tabindex' => 1 ];
3302
3303                         if ( is_array( $customAttribs ) ) {
3304                                 $attribs += $customAttribs;
3305                         }
3306
3307                         if ( count( $classes ) ) {
3308                                 if ( isset( $attribs['class'] ) ) {
3309                                         $classes[] = $attribs['class'];
3310                                 }
3311                                 $attribs['class'] = implode( ' ', $classes );
3312                         }
3313                 }
3314
3315                 $this->showTextbox(
3316                         $textoverride !== null ? $textoverride : $this->textbox1,
3317                         'wpTextbox1',
3318                         $attribs
3319                 );
3320         }
3321
3322         protected function showTextbox2() {
3323                 $this->showTextbox( $this->textbox2, 'wpTextbox2', [ 'tabindex' => 6, 'readonly' ] );
3324         }
3325
3326         protected function showTextbox( $text, $name, $customAttribs = [] ) {
3327                 global $wgUser;
3328
3329                 $wikitext = $this->safeUnicodeOutput( $text );
3330                 $wikitext = $this->addNewLineAtEnd( $wikitext );
3331
3332                 $attribs = $this->buildTextboxAttribs( $name, $customAttribs, $wgUser );
3333
3334                 $this->context->getOutput()->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3335         }
3336
3337         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3338                 $classes = [];
3339                 if ( $isOnTop ) {
3340                         $classes[] = 'ontop';
3341                 }
3342
3343                 $attribs = [ 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) ];
3344
3345                 if ( $this->formtype != 'preview' ) {
3346                         $attribs['style'] = 'display: none;';
3347                 }
3348
3349                 $out = $this->context->getOutput();
3350                 $out->addHTML( Xml::openElement( 'div', $attribs ) );
3351
3352                 if ( $this->formtype == 'preview' ) {
3353                         $this->showPreview( $previewOutput );
3354                 } else {
3355                         // Empty content container for LivePreview
3356                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3357                         $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3358                                 'class' => 'mw-content-' . $pageViewLang->getDir() ];
3359                         $out->addHTML( Html::rawElement( 'div', $attribs ) );
3360                 }
3361
3362                 $out->addHTML( '</div>' );
3363
3364                 if ( $this->formtype == 'diff' ) {
3365                         try {
3366                                 $this->showDiff();
3367                         } catch ( MWContentSerializationException $ex ) {
3368                                 $msg = $this->context->msg(
3369                                         'content-failed-to-parse',
3370                                         $this->contentModel,
3371                                         $this->contentFormat,
3372                                         $ex->getMessage()
3373                                 );
3374                                 $out->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3375                         }
3376                 }
3377         }
3378
3379         /**
3380          * Append preview output to OutputPage.
3381          * Includes category rendering if this is a category page.
3382          *
3383          * @param string $text The HTML to be output for the preview.
3384          */
3385         protected function showPreview( $text ) {
3386                 if ( $this->mArticle instanceof CategoryPage ) {
3387                         $this->mArticle->openShowCategory();
3388                 }
3389                 # This hook seems slightly odd here, but makes things more
3390                 # consistent for extensions.
3391                 $out = $this->context->getOutput();
3392                 Hooks::run( 'OutputPageBeforeHTML', [ &$out, &$text ] );
3393                 $out->addHTML( $text );
3394                 if ( $this->mArticle instanceof CategoryPage ) {
3395                         $this->mArticle->closeShowCategory();
3396                 }
3397         }
3398
3399         /**
3400          * Get a diff between the current contents of the edit box and the
3401          * version of the page we're editing from.
3402          *
3403          * If this is a section edit, we'll replace the section as for final
3404          * save and then make a comparison.
3405          */
3406         public function showDiff() {
3407                 global $wgUser, $wgContLang;
3408
3409                 $oldtitlemsg = 'currentrev';
3410                 # if message does not exist, show diff against the preloaded default
3411                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3412                         $oldtext = $this->mTitle->getDefaultMessageText();
3413                         if ( $oldtext !== false ) {
3414                                 $oldtitlemsg = 'defaultmessagetext';
3415                                 $oldContent = $this->toEditContent( $oldtext );
3416                         } else {
3417                                 $oldContent = null;
3418                         }
3419                 } else {
3420                         $oldContent = $this->getCurrentContent();
3421                 }
3422
3423                 $textboxContent = $this->toEditContent( $this->textbox1 );
3424                 if ( $this->editRevId !== null ) {
3425                         $newContent = $this->page->replaceSectionAtRev(
3426                                 $this->section, $textboxContent, $this->summary, $this->editRevId
3427                         );
3428                 } else {
3429                         $newContent = $this->page->replaceSectionContent(
3430                                 $this->section, $textboxContent, $this->summary, $this->edittime
3431                         );
3432                 }
3433
3434                 if ( $newContent ) {
3435                         Hooks::run( 'EditPageGetDiffContent', [ $this, &$newContent ] );
3436
3437                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3438                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3439                 }
3440
3441                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3442                         $oldtitle = $this->context->msg( $oldtitlemsg )->parse();
3443                         $newtitle = $this->context->msg( 'yourtext' )->parse();
3444
3445                         if ( !$oldContent ) {
3446                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3447                         }
3448
3449                         if ( !$newContent ) {
3450                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3451                         }
3452
3453                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3454                         $de->setContent( $oldContent, $newContent );
3455
3456                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3457                         $de->showDiffStyle();
3458                 } else {
3459                         $difftext = '';
3460                 }
3461
3462                 $this->context->getOutput()->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3463         }
3464
3465         /**
3466          * Show the header copyright warning.
3467          */
3468         protected function showHeaderCopyrightWarning() {
3469                 $msg = 'editpage-head-copy-warn';
3470                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3471                         $this->context->getOutput()->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3472                                 'editpage-head-copy-warn' );
3473                 }
3474         }
3475
3476         /**
3477          * Give a chance for site and per-namespace customizations of
3478          * terms of service summary link that might exist separately
3479          * from the copyright notice.
3480          *
3481          * This will display between the save button and the edit tools,
3482          * so should remain short!
3483          */
3484         protected function showTosSummary() {
3485                 $msg = 'editpage-tos-summary';
3486                 Hooks::run( 'EditPageTosSummary', [ $this->mTitle, &$msg ] );
3487                 if ( !$this->context->msg( $msg )->isDisabled() ) {
3488                         $out = $this->context->getOutput();
3489                         $out->addHTML( '<div class="mw-tos-summary">' );
3490                         $out->addWikiMsg( $msg );
3491                         $out->addHTML( '</div>' );
3492                 }
3493         }
3494
3495         /**
3496          * Inserts optional text shown below edit and upload forms. Can be used to offer special
3497          * characters not present on most keyboards for copying/pasting.
3498          */
3499         protected function showEditTools() {
3500                 $this->context->getOutput()->addHTML( '<div class="mw-editTools">' .
3501                         $this->context->msg( 'edittools' )->inContentLanguage()->parse() .
3502                         '</div>' );
3503         }
3504
3505         /**
3506          * Get the copyright warning
3507          *
3508          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3509          * @return string
3510          */
3511         protected function getCopywarn() {
3512                 return self::getCopyrightWarning( $this->mTitle );
3513         }
3514
3515         /**
3516          * Get the copyright warning, by default returns wikitext
3517          *
3518          * @param Title $title
3519          * @param string $format Output format, valid values are any function of a Message object
3520          * @param Language|string|null $langcode Language code or Language object.
3521          * @return string
3522          */
3523         public static function getCopyrightWarning( $title, $format = 'plain', $langcode = null ) {
3524                 global $wgRightsText;
3525                 if ( $wgRightsText ) {
3526                         $copywarnMsg = [ 'copyrightwarning',
3527                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3528                                 $wgRightsText ];
3529                 } else {
3530                         $copywarnMsg = [ 'copyrightwarning2',
3531                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' ];
3532                 }
3533                 // Allow for site and per-namespace customization of contribution/copyright notice.
3534                 Hooks::run( 'EditPageCopyrightWarning', [ $title, &$copywarnMsg ] );
3535
3536                 $msg = call_user_func_array( 'wfMessage', $copywarnMsg )->title( $title );
3537                 if ( $langcode ) {
3538                         $msg->inLanguage( $langcode );
3539                 }
3540                 return "<div id=\"editpage-copywarn\">\n" .
3541                         $msg->$format() . "\n</div>";
3542         }
3543
3544         /**
3545          * Get the Limit report for page previews
3546          *
3547          * @since 1.22
3548          * @param ParserOutput $output ParserOutput object from the parse
3549          * @return string HTML
3550          */
3551         public static function getPreviewLimitReport( $output ) {
3552                 if ( !$output || !$output->getLimitReportData() ) {
3553                         return '';
3554                 }
3555
3556                 $limitReport = Html::rawElement( 'div', [ 'class' => 'mw-limitReportExplanation' ],
3557                         wfMessage( 'limitreport-title' )->parseAsBlock()
3558                 );
3559
3560                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3561                 $limitReport .= Html::openElement( 'div', [ 'class' => 'preview-limit-report-wrapper' ] );
3562
3563                 $limitReport .= Html::openElement( 'table', [
3564                         'class' => 'preview-limit-report wikitable'
3565                 ] ) .
3566                         Html::openElement( 'tbody' );
3567
3568                 foreach ( $output->getLimitReportData() as $key => $value ) {
3569                         if ( Hooks::run( 'ParserLimitReportFormat',
3570                                 [ $key, &$value, &$limitReport, true, true ]
3571                         ) ) {
3572                                 $keyMsg = wfMessage( $key );
3573                                 $valueMsg = wfMessage( [ "$key-value-html", "$key-value" ] );
3574                                 if ( !$valueMsg->exists() ) {
3575                                         $valueMsg = new RawMessage( '$1' );
3576                                 }
3577                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3578                                         $limitReport .= Html::openElement( 'tr' ) .
3579                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3580                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3581                                                 Html::closeElement( 'tr' );
3582                                 }
3583                         }
3584                 }
3585
3586                 $limitReport .= Html::closeElement( 'tbody' ) .
3587                         Html::closeElement( 'table' ) .
3588                         Html::closeElement( 'div' );
3589
3590                 return $limitReport;
3591         }
3592
3593         protected function showStandardInputs( &$tabindex = 2 ) {
3594                 $out = $this->context->getOutput();
3595                 $out->addHTML( "<div class='editOptions'>\n" );
3596
3597                 if ( $this->section != 'new' ) {
3598                         $this->showSummaryInput( false, $this->summary );
3599                         $out->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3600                 }
3601
3602                 $checkboxes = $this->getCheckboxesWidget(
3603                         $tabindex,
3604                         [ 'minor' => $this->minoredit, 'watch' => $this->watchthis ]
3605                 );
3606                 $checkboxesHTML = new OOUI\HorizontalLayout( [ 'items' => $checkboxes ] );
3607
3608                 $out->addHTML( "<div class='editCheckboxes'>" . $checkboxesHTML . "</div>\n" );
3609
3610                 // Show copyright warning.
3611                 $out->addWikiText( $this->getCopywarn() );
3612                 $out->addHTML( $this->editFormTextAfterWarn );
3613
3614                 $out->addHTML( "<div class='editButtons'>\n" );
3615                 $out->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3616
3617                 $cancel = $this->getCancelLink();
3618                 if ( $cancel !== '' ) {
3619                         $cancel .= Html::element( 'span',
3620                                 [ 'class' => 'mw-editButtons-pipe-separator' ],
3621                                 $this->context->msg( 'pipe-separator' )->text() );
3622                 }
3623
3624                 $message = $this->context->msg( 'edithelppage' )->inContentLanguage()->text();
3625                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3626                 $edithelp =
3627                         Html::linkButton(
3628                                 $this->context->msg( 'edithelp' )->text(),
3629                                 [ 'target' => 'helpwindow', 'href' => $edithelpurl ],
3630                                 [ 'mw-ui-quiet' ]
3631                         ) .
3632                         $this->context->msg( 'word-separator' )->escaped() .
3633                         $this->context->msg( 'newwindow' )->parse();
3634
3635                 $out->addHTML( "        <span class='cancelLink'>{$cancel}</span>\n" );
3636                 $out->addHTML( "        <span class='editHelp'>{$edithelp}</span>\n" );
3637                 $out->addHTML( "</div><!-- editButtons -->\n" );
3638
3639                 Hooks::run( 'EditPage::showStandardInputs:options', [ $this, $out, &$tabindex ] );
3640
3641                 $out->addHTML( "</div><!-- editOptions -->\n" );
3642         }
3643
3644         /**
3645          * Show an edit conflict. textbox1 is already shown in showEditForm().
3646          * If you want to use another entry point to this function, be careful.
3647          */
3648         protected function showConflict() {
3649                 $out = $this->context->getOutput();
3650                 // Avoid PHP 7.1 warning of passing $this by reference
3651                 $editPage = $this;
3652                 if ( Hooks::run( 'EditPageBeforeConflictDiff', [ &$editPage, &$out ] ) ) {
3653                         $this->incrementConflictStats();
3654
3655                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3656
3657                         $content1 = $this->toEditContent( $this->textbox1 );
3658                         $content2 = $this->toEditContent( $this->textbox2 );
3659
3660                         $handler = ContentHandler::getForModelID( $this->contentModel );
3661                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3662                         $de->setContent( $content2, $content1 );
3663                         $de->showDiff(
3664                                 $this->context->msg( 'yourtext' )->parse(),
3665                                 $this->context->msg( 'storedversion' )->text()
3666                         );
3667
3668                         $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3669                         $this->showTextbox2();
3670                 }
3671         }
3672
3673         protected function incrementConflictStats() {
3674                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3675                 $stats->increment( 'edit.failures.conflict' );
3676                 // Only include 'standard' namespaces to avoid creating unknown numbers of statsd metrics
3677                 if (
3678                         $this->mTitle->getNamespace() >= NS_MAIN &&
3679                         $this->mTitle->getNamespace() <= NS_CATEGORY_TALK
3680                 ) {
3681                         $stats->increment( 'edit.failures.conflict.byNamespaceId.' . $this->mTitle->getNamespace() );
3682                 }
3683         }
3684
3685         /**
3686          * @return string
3687          */
3688         public function getCancelLink() {
3689                 $cancelParams = [];
3690                 if ( !$this->isConflict && $this->oldid > 0 ) {
3691                         $cancelParams['oldid'] = $this->oldid;
3692                 } elseif ( $this->getContextTitle()->isRedirect() ) {
3693                         $cancelParams['redirect'] = 'no';
3694                 }
3695
3696                 return new OOUI\ButtonWidget( [
3697                         'id' => 'mw-editform-cancel',
3698                         'href' => $this->getContextTitle()->getLinkUrl( $cancelParams ),
3699                         'label' => new OOUI\HtmlSnippet( $this->context->msg( 'cancel' )->parse() ),
3700                         'framed' => false,
3701                         'infusable' => true,
3702                         'flags' => 'destructive',
3703                 ] );
3704         }
3705
3706         /**
3707          * Returns the URL to use in the form's action attribute.
3708          * This is used by EditPage subclasses when simply customizing the action
3709          * variable in the constructor is not enough. This can be used when the
3710          * EditPage lives inside of a Special page rather than a custom page action.
3711          *
3712          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3713          * @return string
3714          */
3715         protected function getActionURL( Title $title ) {
3716                 return $title->getLocalURL( [ 'action' => $this->action ] );
3717         }
3718
3719         /**
3720          * Check if a page was deleted while the user was editing it, before submit.
3721          * Note that we rely on the logging table, which hasn't been always there,
3722          * but that doesn't matter, because this only applies to brand new
3723          * deletes.
3724          * @return bool
3725          */
3726         protected function wasDeletedSinceLastEdit() {
3727                 if ( $this->deletedSinceEdit !== null ) {
3728                         return $this->deletedSinceEdit;
3729                 }
3730
3731                 $this->deletedSinceEdit = false;
3732
3733                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3734                         $this->lastDelete = $this->getLastDelete();
3735                         if ( $this->lastDelete ) {
3736                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3737                                 if ( $deleteTime > $this->starttime ) {
3738                                         $this->deletedSinceEdit = true;
3739                                 }
3740                         }
3741                 }
3742
3743                 return $this->deletedSinceEdit;
3744         }
3745
3746         /**
3747          * @return bool|stdClass
3748          */
3749         protected function getLastDelete() {
3750                 $dbr = wfGetDB( DB_REPLICA );
3751                 $commentQuery = CommentStore::newKey( 'log_comment' )->getJoin();
3752                 $data = $dbr->selectRow(
3753                         [ 'logging', 'user' ] + $commentQuery['tables'],
3754                         [
3755                                 'log_type',
3756                                 'log_action',
3757                                 'log_timestamp',
3758                                 'log_user',
3759                                 'log_namespace',
3760                                 'log_title',
3761                                 'log_params',
3762                                 'log_deleted',
3763                                 'user_name'
3764                         ] + $commentQuery['fields'], [
3765                                 'log_namespace' => $this->mTitle->getNamespace(),
3766                                 'log_title' => $this->mTitle->getDBkey(),
3767                                 'log_type' => 'delete',
3768                                 'log_action' => 'delete',
3769                                 'user_id=log_user'
3770                         ],
3771                         __METHOD__,
3772                         [ 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ],
3773                         [
3774                                 'user' => [ 'JOIN', 'user_id=log_user' ],
3775                         ] + $commentQuery['joins']
3776                 );
3777                 // Quick paranoid permission checks...
3778                 if ( is_object( $data ) ) {
3779                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3780                                 $data->user_name = $this->context->msg( 'rev-deleted-user' )->escaped();
3781                         }
3782
3783                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3784                                 $data->log_comment_text = $this->context->msg( 'rev-deleted-comment' )->escaped();
3785                                 $data->log_comment_data = null;
3786                         }
3787                 }
3788
3789                 return $data;
3790         }
3791
3792         /**
3793          * Get the rendered text for previewing.
3794          * @throws MWException
3795          * @return string
3796          */
3797         public function getPreviewText() {
3798                 global $wgRawHtml, $wgLang;
3799                 global $wgAllowUserCss, $wgAllowUserJs;
3800
3801                 $out = $this->context->getOutput();
3802
3803                 if ( $wgRawHtml && !$this->mTokenOk ) {
3804                         // Could be an offsite preview attempt. This is very unsafe if
3805                         // HTML is enabled, as it could be an attack.
3806                         $parsedNote = '';
3807                         if ( $this->textbox1 !== '' ) {
3808                                 // Do not put big scary notice, if previewing the empty
3809                                 // string, which happens when you initially edit
3810                                 // a category page, due to automatic preview-on-open.
3811                                 $parsedNote = $out->parse( "<div class='previewnote'>" .
3812                                         $this->context->msg( 'session_fail_preview_html' )->text() . "</div>",
3813                                         true, /* interface */true );
3814                         }
3815                         $this->incrementEditFailureStats( 'session_loss' );
3816                         return $parsedNote;
3817                 }
3818
3819                 $note = '';
3820
3821                 try {
3822                         $content = $this->toEditContent( $this->textbox1 );
3823
3824                         $previewHTML = '';
3825                         if ( !Hooks::run(
3826                                 'AlternateEditPreview',
3827                                 [ $this, &$content, &$previewHTML, &$this->mParserOutput ] )
3828                         ) {
3829                                 return $previewHTML;
3830                         }
3831
3832                         # provide a anchor link to the editform
3833                         $continueEditing = '<span class="mw-continue-editing">' .
3834                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3835                                 $this->context->msg( 'continue-editing' )->text() . ']]</span>';
3836                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3837                                 if ( $this->mTokenOkExceptSuffix ) {
3838                                         $note = $this->context->msg( 'token_suffix_mismatch' )->plain();
3839                                         $this->incrementEditFailureStats( 'bad_token' );
3840                                 } else {
3841                                         $note = $this->context->msg( 'session_fail_preview' )->plain();
3842                                         $this->incrementEditFailureStats( 'session_loss' );
3843                                 }
3844                         } elseif ( $this->incompleteForm ) {
3845                                 $note = $this->context->msg( 'edit_form_incomplete' )->plain();
3846                                 if ( $this->mTriedSave ) {
3847                                         $this->incrementEditFailureStats( 'incomplete_form' );
3848                                 }
3849                         } else {
3850                                 $note = $this->context->msg( 'previewnote' )->plain() . ' ' . $continueEditing;
3851                         }
3852
3853                         # don't parse non-wikitext pages, show message about preview
3854                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3855                                 if ( $this->mTitle->isCssJsSubpage() ) {
3856                                         $level = 'user';
3857                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3858                                         $level = 'site';
3859                                 } else {
3860                                         $level = false;
3861                                 }
3862
3863                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3864                                         $format = 'css';
3865                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3866                                                 $format = false;
3867                                         }
3868                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3869                                         $format = 'js';
3870                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3871                                                 $format = false;
3872                                         }
3873                                 } else {
3874                                         $format = false;
3875                                 }
3876
3877                                 # Used messages to make sure grep find them:
3878                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3879                                 if ( $level && $format ) {
3880                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3881                                                 $this->context->msg( "{$level}{$format}preview" )->text() .
3882                                                 ' ' . $continueEditing . "</div>";
3883                                 }
3884                         }
3885
3886                         # If we're adding a comment, we need to show the
3887                         # summary as the headline
3888                         if ( $this->section === "new" && $this->summary !== "" ) {
3889                                 $content = $content->addSectionHeader( $this->summary );
3890                         }
3891
3892                         $hook_args = [ $this, &$content ];
3893                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3894
3895                         $parserResult = $this->doPreviewParse( $content );
3896                         $parserOutput = $parserResult['parserOutput'];
3897                         $previewHTML = $parserResult['html'];
3898                         $this->mParserOutput = $parserOutput;
3899                         $out->addParserOutputMetadata( $parserOutput );
3900
3901                         if ( count( $parserOutput->getWarnings() ) ) {
3902                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3903                         }
3904
3905                 } catch ( MWContentSerializationException $ex ) {
3906                         $m = $this->context->msg(
3907                                 'content-failed-to-parse',
3908                                 $this->contentModel,
3909                                 $this->contentFormat,
3910                                 $ex->getMessage()
3911                         );
3912                         $note .= "\n\n" . $m->parse();
3913                         $previewHTML = '';
3914                 }
3915
3916                 if ( $this->isConflict ) {
3917                         $conflict = '<h2 id="mw-previewconflict">'
3918                                 . $this->context->msg( 'previewconflict' )->escaped() . "</h2>\n";
3919                 } else {
3920                         $conflict = '<hr />';
3921                 }
3922
3923                 $previewhead = "<div class='previewnote'>\n" .
3924                         '<h2 id="mw-previewheader">' . $this->context->msg( 'preview' )->escaped() . "</h2>" .
3925                         $out->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3926
3927                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3928                 $attribs = [ 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3929                         'class' => 'mw-content-' . $pageViewLang->getDir() ];
3930                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3931
3932                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3933         }
3934
3935         private function incrementEditFailureStats( $failureType ) {
3936                 $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
3937                 $stats->increment( 'edit.failures.' . $failureType );
3938         }
3939
3940         /**
3941          * Get parser options for a preview
3942          * @return ParserOptions
3943          */
3944         protected function getPreviewParserOptions() {
3945                 $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3946                 $parserOptions->setIsPreview( true );
3947                 $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3948                 $parserOptions->enableLimitReport();
3949                 return $parserOptions;
3950         }
3951
3952         /**
3953          * Parse the page for a preview. Subclasses may override this class, in order
3954          * to parse with different options, or to otherwise modify the preview HTML.
3955          *
3956          * @param Content $content The page content
3957          * @return array with keys:
3958          *   - parserOutput: The ParserOutput object
3959          *   - html: The HTML to be displayed
3960          */
3961         protected function doPreviewParse( Content $content ) {
3962                 global $wgUser;
3963                 $parserOptions = $this->getPreviewParserOptions();
3964                 $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3965                 $scopedCallback = $parserOptions->setupFakeRevision(
3966                         $this->mTitle, $pstContent, $wgUser );
3967                 $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3968                 ScopedCallback::consume( $scopedCallback );
3969                 $parserOutput->setEditSectionTokens( false ); // no section edit links
3970                 return [
3971                         'parserOutput' => $parserOutput,
3972                         'html' => $parserOutput->getText() ];
3973         }
3974
3975         /**
3976          * @return array
3977          */
3978         public function getTemplates() {
3979                 if ( $this->preview || $this->section != '' ) {
3980                         $templates = [];
3981                         if ( !isset( $this->mParserOutput ) ) {
3982                                 return $templates;
3983                         }
3984                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3985                                 foreach ( array_keys( $template ) as $dbk ) {
3986                                         $templates[] = Title::makeTitle( $ns, $dbk );
3987                                 }
3988                         }
3989                         return $templates;
3990                 } else {
3991                         return $this->mTitle->getTemplateLinksFrom();
3992                 }
3993         }
3994
3995         /**
3996          * Shows a bulletin board style toolbar for common editing functions.
3997          * It can be disabled in the user preferences.
3998          *
3999          * @param Title $title Title object for the page being edited (optional)
4000          * @return string
4001          */
4002         public static function getEditToolbar( $title = null ) {
4003                 global $wgContLang, $wgOut;
4004                 global $wgEnableUploads, $wgForeignFileRepos;
4005
4006                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
4007                 $showSignature = true;
4008                 if ( $title ) {
4009                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
4010                 }
4011
4012                 /**
4013                  * $toolarray is an array of arrays each of which includes the
4014                  * opening tag, the closing tag, optionally a sample text that is
4015                  * inserted between the two when no selection is highlighted
4016                  * and.  The tip text is shown when the user moves the mouse
4017                  * over the button.
4018                  *
4019                  * Images are defined in ResourceLoaderEditToolbarModule.
4020                  */
4021                 $toolarray = [
4022                         [
4023                                 'id'     => 'mw-editbutton-bold',
4024                                 'open'   => '\'\'\'',
4025                                 'close'  => '\'\'\'',
4026                                 'sample' => wfMessage( 'bold_sample' )->text(),
4027                                 'tip'    => wfMessage( 'bold_tip' )->text(),
4028                         ],
4029                         [
4030                                 'id'     => 'mw-editbutton-italic',
4031                                 'open'   => '\'\'',
4032                                 'close'  => '\'\'',
4033                                 'sample' => wfMessage( 'italic_sample' )->text(),
4034                                 'tip'    => wfMessage( 'italic_tip' )->text(),
4035                         ],
4036                         [
4037                                 'id'     => 'mw-editbutton-link',
4038                                 'open'   => '[[',
4039                                 'close'  => ']]',
4040                                 'sample' => wfMessage( 'link_sample' )->text(),
4041                                 'tip'    => wfMessage( 'link_tip' )->text(),
4042                         ],
4043                         [
4044                                 'id'     => 'mw-editbutton-extlink',
4045                                 'open'   => '[',
4046                                 'close'  => ']',
4047                                 'sample' => wfMessage( 'extlink_sample' )->text(),
4048                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
4049                         ],
4050                         [
4051                                 'id'     => 'mw-editbutton-headline',
4052                                 'open'   => "\n== ",
4053                                 'close'  => " ==\n",
4054                                 'sample' => wfMessage( 'headline_sample' )->text(),
4055                                 'tip'    => wfMessage( 'headline_tip' )->text(),
4056                         ],
4057                         $imagesAvailable ? [
4058                                 'id'     => 'mw-editbutton-image',
4059                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
4060                                 'close'  => ']]',
4061                                 'sample' => wfMessage( 'image_sample' )->text(),
4062                                 'tip'    => wfMessage( 'image_tip' )->text(),
4063                         ] : false,
4064                         $imagesAvailable ? [
4065                                 'id'     => 'mw-editbutton-media',
4066                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
4067                                 'close'  => ']]',
4068                                 'sample' => wfMessage( 'media_sample' )->text(),
4069                                 'tip'    => wfMessage( 'media_tip' )->text(),
4070                         ] : false,
4071                         [
4072                                 'id'     => 'mw-editbutton-nowiki',
4073                                 'open'   => "<nowiki>",
4074                                 'close'  => "</nowiki>",
4075                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
4076                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
4077                         ],
4078                         $showSignature ? [
4079                                 'id'     => 'mw-editbutton-signature',
4080                                 'open'   => wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text(),
4081                                 'close'  => '',
4082                                 'sample' => '',
4083                                 'tip'    => wfMessage( 'sig_tip' )->text(),
4084                         ] : false,
4085                         [
4086                                 'id'     => 'mw-editbutton-hr',
4087                                 'open'   => "\n----\n",
4088                                 'close'  => '',
4089                                 'sample' => '',
4090                                 'tip'    => wfMessage( 'hr_tip' )->text(),
4091                         ]
4092                 ];
4093
4094                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
4095                 foreach ( $toolarray as $tool ) {
4096                         if ( !$tool ) {
4097                                 continue;
4098                         }
4099
4100                         $params = [
4101                                 // Images are defined in ResourceLoaderEditToolbarModule
4102                                 false,
4103                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
4104                                 // Older browsers show a "speedtip" type message only for ALT.
4105                                 // Ideally these should be different, realistically they
4106                                 // probably don't need to be.
4107                                 $tool['tip'],
4108                                 $tool['open'],
4109                                 $tool['close'],
4110                                 $tool['sample'],
4111                                 $tool['id'],
4112                         ];
4113
4114                         $script .= Xml::encodeJsCall(
4115                                 'mw.toolbar.addButton',
4116                                 $params,
4117                                 ResourceLoader::inDebugMode()
4118                         );
4119                 }
4120
4121                 $script .= '});';
4122
4123                 $toolbar = '<div id="toolbar"></div>';
4124
4125                 if ( Hooks::run( 'EditPageBeforeEditToolbar', [ &$toolbar ] ) ) {
4126                         // Only add the old toolbar cruft to the page payload if the toolbar has not
4127                         // been over-written by a hook caller
4128                         $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
4129                 };
4130
4131                 return $toolbar;
4132         }
4133
4134         /**
4135          * Return an array of checkbox definitions.
4136          *
4137          * Array keys correspond to the `<input>` 'name' attribute to use for each checkbox.
4138          *
4139          * Array values are associative arrays with the following keys:
4140          *  - 'label-message' (required): message for label text
4141          *  - 'id' (required): 'id' attribute for the `<input>`
4142          *  - 'default' (required): default checkedness (true or false)
4143          *  - 'title-message' (optional): used to generate 'title' attribute for the `<label>`
4144          *  - 'tooltip' (optional): used to generate 'title' and 'accesskey' attributes
4145          *    from messages like 'tooltip-foo', 'accesskey-foo'
4146          *  - 'label-id' (optional): 'id' attribute for the `<label>`
4147          *  - 'legacy-name' (optional): short name for backwards-compatibility
4148          * @param array $checked Array of checkbox name (matching the 'legacy-name') => bool,
4149          *   where bool indicates the checked status of the checkbox
4150          * @return array
4151          */
4152         public function getCheckboxesDefinition( $checked ) {
4153                 global $wgUser;
4154                 $checkboxes = [];
4155
4156                 // don't show the minor edit checkbox if it's a new page or section
4157                 if ( !$this->isNew && $wgUser->isAllowed( 'minoredit' ) ) {
4158                         $checkboxes['wpMinoredit'] = [
4159                                 'id' => 'wpMinoredit',
4160                                 'label-message' => 'minoredit',
4161                                 // Uses messages: tooltip-minoredit, accesskey-minoredit
4162                                 'tooltip' => 'minoredit',
4163                                 'label-id' => 'mw-editpage-minoredit',
4164                                 'legacy-name' => 'minor',
4165                                 'default' => $checked['minor'],
4166                         ];
4167                 }
4168
4169                 if ( $wgUser->isLoggedIn() ) {
4170                         $checkboxes['wpWatchthis'] = [
4171                                 'id' => 'wpWatchthis',
4172                                 'label-message' => 'watchthis',
4173                                 // Uses messages: tooltip-watch, accesskey-watch
4174                                 'tooltip' => 'watch',
4175                                 'label-id' => 'mw-editpage-watch',
4176                                 'legacy-name' => 'watch',
4177                                 'default' => $checked['watch'],
4178                         ];
4179                 }
4180
4181                 $editPage = $this;
4182                 Hooks::run( 'EditPageGetCheckboxesDefinition', [ $editPage, &$checkboxes ] );
4183
4184                 return $checkboxes;
4185         }
4186
4187         /**
4188          * Returns an array of html code of the following checkboxes old style:
4189          * minor and watch
4190          *
4191          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4192          * @param int &$tabindex Current tabindex
4193          * @param array $checked See getCheckboxesDefinition()
4194          * @return array
4195          */
4196         public function getCheckboxes( &$tabindex, $checked ) {
4197                 global $wgUseMediaWikiUIEverywhere;
4198
4199                 $checkboxes = [];
4200                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4201
4202                 // Backwards-compatibility for the EditPageBeforeEditChecks hook
4203                 if ( !$this->isNew ) {
4204                         $checkboxes['minor'] = '';
4205                 }
4206                 $checkboxes['watch'] = '';
4207
4208                 foreach ( $checkboxesDef as $name => $options ) {
4209                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4210                         $label = $this->context->msg( $options['label-message'] )->parse();
4211                         $attribs = [
4212                                 'tabindex' => ++$tabindex,
4213                                 'id' => $options['id'],
4214                         ];
4215                         $labelAttribs = [
4216                                 'for' => $options['id'],
4217                         ];
4218                         if ( isset( $options['tooltip'] ) ) {
4219                                 $attribs['accesskey'] = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4220                                 $labelAttribs['title'] = Linker::titleAttrib( $options['tooltip'], 'withaccess' );
4221                         }
4222                         if ( isset( $options['title-message'] ) ) {
4223                                 $labelAttribs['title'] = $this->context->msg( $options['title-message'] )->text();
4224                         }
4225                         if ( isset( $options['label-id'] ) ) {
4226                                 $labelAttribs['id'] = $options['label-id'];
4227                         }
4228                         $checkboxHtml =
4229                                 Xml::check( $name, $options['default'], $attribs ) .
4230                                 '&#160;' .
4231                                 Xml::tags( 'label', $labelAttribs, $label );
4232
4233                         if ( $wgUseMediaWikiUIEverywhere ) {
4234                                 $checkboxHtml = Html::rawElement( 'div', [ 'class' => 'mw-ui-checkbox' ], $checkboxHtml );
4235                         }
4236
4237                         $checkboxes[ $legacyName ] = $checkboxHtml;
4238                 }
4239
4240                 // Avoid PHP 7.1 warning of passing $this by reference
4241                 $editPage = $this;
4242                 Hooks::run( 'EditPageBeforeEditChecks', [ &$editPage, &$checkboxes, &$tabindex ], '1.29' );
4243                 return $checkboxes;
4244         }
4245
4246         /**
4247          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4248          * any other added by extensions.
4249          *
4250          * @deprecated since 1.30 Use getCheckboxesWidget() or getCheckboxesDefinition() instead
4251          * @param int &$tabindex Current tabindex
4252          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4253          *                 status of the checkbox
4254          *
4255          * @return array Associative array of string keys to OOUI\FieldLayout instances
4256          */
4257         public function getCheckboxesOOUI( &$tabindex, $checked ) {
4258                 return $this->getCheckboxesWidget( $tabindex, $checked );
4259         }
4260
4261         /**
4262          * Returns an array of checkboxes for the edit form, including 'minor' and 'watch' checkboxes and
4263          * any other added by extensions.
4264          *
4265          * @param int &$tabindex Current tabindex
4266          * @param array $checked Array of checkbox => bool, where bool indicates the checked
4267          *                 status of the checkbox
4268          *
4269          * @return array Associative array of string keys to OOUI\FieldLayout instances
4270          */
4271         public function getCheckboxesWidget( &$tabindex, $checked ) {
4272                 $checkboxes = [];
4273                 $checkboxesDef = $this->getCheckboxesDefinition( $checked );
4274
4275                 foreach ( $checkboxesDef as $name => $options ) {
4276                         $legacyName = isset( $options['legacy-name'] ) ? $options['legacy-name'] : $name;
4277
4278                         $title = null;
4279                         $accesskey = null;
4280                         if ( isset( $options['tooltip'] ) ) {
4281                                 $accesskey = $this->context->msg( "accesskey-{$options['tooltip']}" )->text();
4282                                 $title = Linker::titleAttrib( $options['tooltip'] );
4283                         }
4284                         if ( isset( $options['title-message'] ) ) {
4285                                 $title = $this->context->msg( $options['title-message'] )->text();
4286                         }
4287
4288                         $checkboxes[ $legacyName ] = new OOUI\FieldLayout(
4289                                 new OOUI\CheckboxInputWidget( [
4290                                         'tabIndex' => ++$tabindex,
4291                                         'accessKey' => $accesskey,
4292                                         'id' => $options['id'] . 'Widget',
4293                                         'inputId' => $options['id'],
4294                                         'name' => $name,
4295                                         'selected' => $options['default'],
4296                                         'infusable' => true,
4297                                 ] ),
4298                                 [
4299                                         'align' => 'inline',
4300                                         'label' => new OOUI\HtmlSnippet( $this->context->msg( $options['label-message'] )->parse() ),
4301                                         'title' => $title,
4302                                         'id' => isset( $options['label-id'] ) ? $options['label-id'] : null,
4303                                 ]
4304                         );
4305                 }
4306
4307                 // Backwards-compatibility hack to run the EditPageBeforeEditChecks hook. It's important,
4308                 // people have used it for the weirdest things completely unrelated to checkboxes...
4309                 // And if we're gonna run it, might as well allow its legacy checkboxes to be shown.
4310                 $legacyCheckboxes = [];
4311                 if ( !$this->isNew ) {
4312                         $legacyCheckboxes['minor'] = '';
4313                 }
4314                 $legacyCheckboxes['watch'] = '';
4315                 // Copy new-style checkboxes into an old-style structure
4316                 foreach ( $checkboxes as $name => $oouiLayout ) {
4317                         $legacyCheckboxes[$name] = (string)$oouiLayout;
4318                 }
4319                 // Avoid PHP 7.1 warning of passing $this by reference
4320                 $ep = $this;
4321                 Hooks::run( 'EditPageBeforeEditChecks', [ &$ep, &$legacyCheckboxes, &$tabindex ], '1.29' );
4322                 // Copy back any additional old-style checkboxes into the new-style structure
4323                 foreach ( $legacyCheckboxes as $name => $html ) {
4324                         if ( $html && !isset( $checkboxes[$name] ) ) {
4325                                 $checkboxes[$name] = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $html ) ] );
4326                         }
4327                 }
4328
4329                 return $checkboxes;
4330         }
4331
4332         /**
4333          * Get the message key of the label for the button to save the page
4334          *
4335          * @return string
4336          */
4337         private function getSaveButtonLabel() {
4338                 $labelAsPublish =
4339                         $this->mArticle->getContext()->getConfig()->get( 'EditSubmitButtonLabelPublish' );
4340
4341                 // Can't use $this->isNew as that's also true if we're adding a new section to an extant page
4342                 $newPage = !$this->mTitle->exists();
4343
4344                 if ( $labelAsPublish ) {
4345                         $buttonLabelKey = $newPage ? 'publishpage' : 'publishchanges';
4346                 } else {
4347                         $buttonLabelKey = $newPage ? 'savearticle' : 'savechanges';
4348                 }
4349
4350                 return $buttonLabelKey;
4351         }
4352
4353         /**
4354          * Returns an array of html code of the following buttons:
4355          * save, diff and preview
4356          *
4357          * @param int &$tabindex Current tabindex
4358          *
4359          * @return array
4360          */
4361         public function getEditButtons( &$tabindex ) {
4362                 $buttons = [];
4363
4364                 $buttonLabel = $this->context->msg( $this->getSaveButtonLabel() )->text();
4365
4366                 $attribs = [
4367                         'name' => 'wpSave',
4368                         'tabindex' => ++$tabindex,
4369                 ];
4370
4371                 $saveConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4372                 $buttons['save'] = new OOUI\ButtonInputWidget( [
4373                         'id' => 'wpSaveWidget',
4374                         'inputId' => 'wpSave',
4375                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4376                         'useInputTag' => true,
4377                         'flags' => [ 'constructive', 'primary' ],
4378                         'label' => $buttonLabel,
4379                         'infusable' => true,
4380                         'type' => 'submit',
4381                         'title' => Linker::titleAttrib( 'save' ),
4382                         'accessKey' => Linker::accesskey( 'save' ),
4383                 ] + $saveConfig );
4384
4385                 $attribs = [
4386                         'name' => 'wpPreview',
4387                         'tabindex' => ++$tabindex,
4388                 ];
4389
4390                 $previewConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4391                 $buttons['preview'] = new OOUI\ButtonInputWidget( [
4392                         'id' => 'wpPreviewWidget',
4393                         'inputId' => 'wpPreview',
4394                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4395                         'useInputTag' => true,
4396                         'label' => $this->context->msg( 'showpreview' )->text(),
4397                         'infusable' => true,
4398                         'type' => 'submit',
4399                         'title' => Linker::titleAttrib( 'preview' ),
4400                         'accessKey' => Linker::accesskey( 'preview' ),
4401                 ] + $previewConfig );
4402
4403                 $attribs = [
4404                         'name' => 'wpDiff',
4405                         'tabindex' => ++$tabindex,
4406                 ];
4407
4408                 $diffConfig = OOUI\Element::configFromHtmlAttributes( $attribs );
4409                 $buttons['diff'] = new OOUI\ButtonInputWidget( [
4410                         'id' => 'wpDiffWidget',
4411                         'inputId' => 'wpDiff',
4412                         // Support: IE 6 – Use <input>, otherwise it can't distinguish which button was clicked
4413                         'useInputTag' => true,
4414                         'label' => $this->context->msg( 'showdiff' )->text(),
4415                         'infusable' => true,
4416                         'type' => 'submit',
4417                         'title' => Linker::titleAttrib( 'diff' ),
4418                         'accessKey' => Linker::accesskey( 'diff' ),
4419                 ] + $diffConfig );
4420
4421                 // Avoid PHP 7.1 warning of passing $this by reference
4422                 $editPage = $this;
4423                 Hooks::run( 'EditPageBeforeEditButtons', [ &$editPage, &$buttons, &$tabindex ] );
4424
4425                 return $buttons;
4426         }
4427
4428         /**
4429          * Creates a basic error page which informs the user that
4430          * they have attempted to edit a nonexistent section.
4431          */
4432         public function noSuchSectionPage() {
4433                 $out = $this->context->getOutput();
4434                 $out->prepareErrorPage( $this->context->msg( 'nosuchsectiontitle' ) );
4435
4436                 $res = $this->context->msg( 'nosuchsectiontext', $this->section )->parseAsBlock();
4437
4438                 // Avoid PHP 7.1 warning of passing $this by reference
4439                 $editPage = $this;
4440                 Hooks::run( 'EditPageNoSuchSection', [ &$editPage, &$res ] );
4441                 $out->addHTML( $res );
4442
4443                 $out->returnToMain( false, $this->mTitle );
4444         }
4445
4446         /**
4447          * Show "your edit contains spam" page with your diff and text
4448          *
4449          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4450          */
4451         public function spamPageWithContent( $match = false ) {
4452                 global $wgLang;
4453                 $this->textbox2 = $this->textbox1;
4454
4455                 if ( is_array( $match ) ) {
4456                         $match = $wgLang->listToText( $match );
4457                 }
4458                 $out = $this->context->getOutput();
4459                 $out->prepareErrorPage( $this->context->msg( 'spamprotectiontitle' ) );
4460
4461                 $out->addHTML( '<div id="spamprotected">' );
4462                 $out->addWikiMsg( 'spamprotectiontext' );
4463                 if ( $match ) {
4464                         $out->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4465                 }
4466                 $out->addHTML( '</div>' );
4467
4468                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4469                 $this->showDiff();
4470
4471                 $out->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4472                 $this->showTextbox2();
4473
4474                 $out->addReturnTo( $this->getContextTitle(), [ 'action' => 'edit' ] );
4475         }
4476
4477         /**
4478          * Check if the browser is on a blacklist of user-agents known to
4479          * mangle UTF-8 data on form submission. Returns true if Unicode
4480          * should make it through, false if it's known to be a problem.
4481          * @return bool
4482          */
4483         private function checkUnicodeCompliantBrowser() {
4484                 global $wgBrowserBlackList, $wgRequest;
4485
4486                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4487                 if ( $currentbrowser === false ) {
4488                         // No User-Agent header sent? Trust it by default...
4489                         return true;
4490                 }
4491
4492                 foreach ( $wgBrowserBlackList as $browser ) {
4493                         if ( preg_match( $browser, $currentbrowser ) ) {
4494                                 return false;
4495                         }
4496                 }
4497                 return true;
4498         }
4499
4500         /**
4501          * Filter an input field through a Unicode de-armoring process if it
4502          * came from an old browser with known broken Unicode editing issues.
4503          *
4504          * @param WebRequest $request
4505          * @param string $field
4506          * @return string
4507          */
4508         protected function safeUnicodeInput( $request, $field ) {
4509                 $text = rtrim( $request->getText( $field ) );
4510                 return $request->getBool( 'safemode' )
4511                         ? $this->unmakeSafe( $text )
4512                         : $text;
4513         }
4514
4515         /**
4516          * Filter an output field through a Unicode armoring process if it is
4517          * going to an old browser with known broken Unicode editing issues.
4518          *
4519          * @param string $text
4520          * @return string
4521          */
4522         protected function safeUnicodeOutput( $text ) {
4523                 return $this->checkUnicodeCompliantBrowser()
4524                         ? $text
4525                         : $this->makeSafe( $text );
4526         }
4527
4528         /**
4529          * A number of web browsers are known to corrupt non-ASCII characters
4530          * in a UTF-8 text editing environment. To protect against this,
4531          * detected browsers will be served an armored version of the text,
4532          * with non-ASCII chars converted to numeric HTML character references.
4533          *
4534          * Preexisting such character references will have a 0 added to them
4535          * to ensure that round-trips do not alter the original data.
4536          *
4537          * @param string $invalue
4538          * @return string
4539          */
4540         private function makeSafe( $invalue ) {
4541                 // Armor existing references for reversibility.
4542                 $invalue = strtr( $invalue, [ "&#x" => "&#x0" ] );
4543
4544                 $bytesleft = 0;
4545                 $result = "";
4546                 $working = 0;
4547                 $valueLength = strlen( $invalue );
4548                 for ( $i = 0; $i < $valueLength; $i++ ) {
4549                         $bytevalue = ord( $invalue[$i] );
4550                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4551                                 $result .= chr( $bytevalue );
4552                                 $bytesleft = 0;
4553                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4554                                 $working = $working << 6;
4555                                 $working += ( $bytevalue & 0x3F );
4556                                 $bytesleft--;
4557                                 if ( $bytesleft <= 0 ) {
4558                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4559                                 }
4560                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4561                                 $working = $bytevalue & 0x1F;
4562                                 $bytesleft = 1;
4563                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4564                                 $working = $bytevalue & 0x0F;
4565                                 $bytesleft = 2;
4566                         } else { // 1111 0xxx
4567                                 $working = $bytevalue & 0x07;
4568                                 $bytesleft = 3;
4569                         }
4570                 }
4571                 return $result;
4572         }
4573
4574         /**
4575          * Reverse the previously applied transliteration of non-ASCII characters
4576          * back to UTF-8. Used to protect data from corruption by broken web browsers
4577          * as listed in $wgBrowserBlackList.
4578          *
4579          * @param string $invalue
4580          * @return string
4581          */
4582         private function unmakeSafe( $invalue ) {
4583                 $result = "";
4584                 $valueLength = strlen( $invalue );
4585                 for ( $i = 0; $i < $valueLength; $i++ ) {
4586                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4587                                 $i += 3;
4588                                 $hexstring = "";
4589                                 do {
4590                                         $hexstring .= $invalue[$i];
4591                                         $i++;
4592                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4593
4594                                 // Do some sanity checks. These aren't needed for reversibility,
4595                                 // but should help keep the breakage down if the editor
4596                                 // breaks one of the entities whilst editing.
4597                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4598                                         $codepoint = hexdec( $hexstring );
4599                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4600                                 } else {
4601                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4602                                 }
4603                         } else {
4604                                 $result .= substr( $invalue, $i, 1 );
4605                         }
4606                 }
4607                 // reverse the transform that we made for reversibility reasons.
4608                 return strtr( $result, [ "&#x0" => "&#x" ] );
4609         }
4610
4611         /**
4612          * @since 1.29
4613          */
4614         protected function addEditNotices() {
4615                 $out = $this->context->getOutput();
4616                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
4617                 if ( count( $editNotices ) ) {
4618                         $out->addHTML( implode( "\n", $editNotices ) );
4619                 } else {
4620                         $msg = $this->context->msg( 'editnotice-notext' );
4621                         if ( !$msg->isDisabled() ) {
4622                                 $out->addHTML(
4623                                         '<div class="mw-editnotice-notext">'
4624                                         . $msg->parseAsBlock()
4625                                         . '</div>'
4626                                 );
4627                         }
4628                 }
4629         }
4630
4631         /**
4632          * @since 1.29
4633          */
4634         protected function addTalkPageText() {
4635                 if ( $this->mTitle->isTalkPage() ) {
4636                         $this->context->getOutput()->addWikiMsg( 'talkpagetext' );
4637                 }
4638         }
4639
4640         /**
4641          * @since 1.29
4642          */
4643         protected function addLongPageWarningHeader() {
4644                 global $wgMaxArticleSize, $wgLang;
4645
4646                 if ( $this->contentLength === false ) {
4647                         $this->contentLength = strlen( $this->textbox1 );
4648                 }
4649
4650                 $out = $this->context->getOutput();
4651                 if ( $this->tooBig || $this->contentLength > $wgMaxArticleSize * 1024 ) {
4652                         $out->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
4653                                 [
4654                                         'longpageerror',
4655                                         $wgLang->formatNum( round( $this->contentLength / 1024, 3 ) ),
4656                                         $wgLang->formatNum( $wgMaxArticleSize )
4657                                 ]
4658                         );
4659                 } else {
4660                         if ( !$this->context->msg( 'longpage-hint' )->isDisabled() ) {
4661                                 $out->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
4662                                         [
4663                                                 'longpage-hint',
4664                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
4665                                                 strlen( $this->textbox1 )
4666                                         ]
4667                                 );
4668                         }
4669                 }
4670         }
4671
4672         /**
4673          * @since 1.29
4674          */
4675         protected function addPageProtectionWarningHeaders() {
4676                 $out = $this->context->getOutput();
4677                 if ( $this->mTitle->isProtected( 'edit' ) &&
4678                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== [ '' ]
4679                 ) {
4680                         # Is the title semi-protected?
4681                         if ( $this->mTitle->isSemiProtected() ) {
4682                                 $noticeMsg = 'semiprotectedpagewarning';
4683                         } else {
4684                                 # Then it must be protected based on static groups (regular)
4685                                 $noticeMsg = 'protectedpagewarning';
4686                         }
4687                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4688                                 [ 'lim' => 1, 'msgKey' => [ $noticeMsg ] ] );
4689                 }
4690                 if ( $this->mTitle->isCascadeProtected() ) {
4691                         # Is this page under cascading protection from some source pages?
4692                         /** @var Title[] $cascadeSources */
4693                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
4694                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
4695                         $cascadeSourcesCount = count( $cascadeSources );
4696                         if ( $cascadeSourcesCount > 0 ) {
4697                                 # Explain, and list the titles responsible
4698                                 foreach ( $cascadeSources as $page ) {
4699                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
4700                                 }
4701                         }
4702                         $notice .= '</div>';
4703                         $out->wrapWikiMsg( $notice, [ 'cascadeprotectedwarning', $cascadeSourcesCount ] );
4704                 }
4705                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
4706                         LogEventsList::showLogExtract( $out, 'protect', $this->mTitle, '',
4707                                 [ 'lim' => 1,
4708                                         'showIfEmpty' => false,
4709                                         'msgKey' => [ 'titleprotectedwarning' ],
4710                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ] );
4711                 }
4712         }
4713
4714         /**
4715          * @param OutputPage $out
4716          * @since 1.29
4717          */
4718         protected function addExplainConflictHeader( OutputPage $out ) {
4719                 $out->wrapWikiMsg(
4720                         "<div class='mw-explainconflict'>\n$1\n</div>",
4721                         [ 'explainconflict', $this->context->msg( $this->getSaveButtonLabel() )->text() ]
4722                 );
4723         }
4724
4725         /**
4726          * @param string $name
4727          * @param mixed[] $customAttribs
4728          * @param User $user
4729          * @return mixed[]
4730          * @since 1.29
4731          */
4732         protected function buildTextboxAttribs( $name, array $customAttribs, User $user ) {
4733                 $attribs = $customAttribs + [
4734                                 'accesskey' => ',',
4735                                 'id' => $name,
4736                                 'cols' => 80,
4737                                 'rows' => 25,
4738                                 // Avoid PHP notices when appending preferences
4739                                 // (appending allows customAttribs['style'] to still work).
4740                                 'style' => ''
4741                         ];
4742
4743                 // The following classes can be used here:
4744                 // * mw-editfont-default
4745                 // * mw-editfont-monospace
4746                 // * mw-editfont-sans-serif
4747                 // * mw-editfont-serif
4748                 $class = 'mw-editfont-' . $user->getOption( 'editfont' );
4749
4750                 if ( isset( $attribs['class'] ) ) {
4751                         if ( is_string( $attribs['class'] ) ) {
4752                                 $attribs['class'] .= ' ' . $class;
4753                         } elseif ( is_array( $attribs['class'] ) ) {
4754                                 $attribs['class'][] = $class;
4755                         }
4756                 } else {
4757                         $attribs['class'] = $class;
4758                 }
4759
4760                 $pageLang = $this->mTitle->getPageLanguage();
4761                 $attribs['lang'] = $pageLang->getHtmlCode();
4762                 $attribs['dir'] = $pageLang->getDir();
4763
4764                 return $attribs;
4765         }
4766
4767         /**
4768          * @param string $wikitext
4769          * @return string
4770          * @since 1.29
4771          */
4772         protected function addNewLineAtEnd( $wikitext ) {
4773                 if ( strval( $wikitext ) !== '' ) {
4774                         // Ensure there's a newline at the end, otherwise adding lines
4775                         // is awkward.
4776                         // But don't add a newline if the text is empty, or Firefox in XHTML
4777                         // mode will show an extra newline. A bit annoying.
4778                         $wikitext .= "\n";
4779                         return $wikitext;
4780                 }
4781                 return $wikitext;
4782         }
4783
4784         /**
4785          * Turns section name wikitext into anchors for use in HTTP redirects. Various
4786          * versions of Microsoft browsers misinterpret fragment encoding of Location: headers
4787          * resulting in mojibake in address bar. Redirect them to legacy section IDs,
4788          * if possible. All the other browsers get HTML5 if the wiki is configured for it, to
4789          * spread the new style links more efficiently.
4790          *
4791          * @param string $text
4792          * @return string
4793          */
4794         private function guessSectionName( $text ) {
4795                 global $wgParser;
4796
4797                 // Detect Microsoft browsers
4798                 $userAgent = $this->context->getRequest()->getHeader( 'User-Agent' );
4799                 if ( $userAgent && preg_match( '/MSIE|Edge/', $userAgent ) ) {
4800                         // ...and redirect them to legacy encoding, if available
4801                         return $wgParser->guessLegacySectionNameFromWikiText( $text );
4802                 }
4803                 // Meanwhile, real browsers get real anchors
4804                 return $wgParser->guessSectionNameFromWikiText( $text );
4805         }
4806 }