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 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: user tried to modify the content model, but is not allowed to do that
 149          * ( User::isAllowed('editcontentmodel') == false )
 150          */
 151         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 152
 153         /**
 154          * Status: user tried to create self-redirect (redirect to the same article) and
 155          * wpIgnoreSelfRedirect == false
 156          */
 157         const AS_SELF_REDIRECT = 236;
 158
 159         /**
 160          * Status: can't parse content
 161          */
 162         const AS_PARSE_ERROR = 240;
 163
 164         /**
 165          * HTML id and name for the beginning of the edit form.
 166          */
 167         const EDITFORM_ID = 'editform';
 168
 169         /**
 170          * Prefix of key for cookie used to pass post-edit state.
 171          * The revision id edited is added after this
 172          */
 173         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 174
 175         /**
 176          * Duration of PostEdit cookie, in seconds.
 177          * The cookie will be removed instantly if the JavaScript runs.
 178          *
 179          * Otherwise, though, we don't want the cookies to accumulate.
 180          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 181          * limit of only 20 cookies per domain. This still applies at least to some
 182          * versions of IE without full updates:
 183          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 184          *
 185          * A value of 20 minutes should be enough to take into account slow loads and minor
 186          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 187          */
 188         const POST_EDIT_COOKIE_DURATION = 1200;
 189
 190         /** @var Article */
 191         public $mArticle;
 192
 193         /** @var Title */
 194         public $mTitle;
 195
 196         /** @var null|Title */
 197         private $mContextTitle = null;
 198
 199         /** @var string */
 200         public $action = 'submit';
 201
 202         /** @var bool */
 203         public $isConflict = false;
 204
 205         /** @var bool */
 206         public $isCssJsSubpage = false;
 207
 208         /** @var bool */
 209         public $isCssSubpage = false;
 210
 211         /** @var bool */
 212         public $isJsSubpage = false;
 213
 214         /** @var bool */
 215         public $isWrongCaseCssJsPage = false;
 216
 217         /** @var bool New page or new section */
 218         public $isNew = false;
 219
 220         /** @var bool */
 221         public $deletedSinceEdit;
 222
 223         /** @var string */
 224         public $formtype;
 225
 226         /** @var bool */
 227         public $firsttime;
 228
 229         /** @var bool|stdClass */
 230         public $lastDelete;
 231
 232         /** @var bool */
 233         public $mTokenOk = false;
 234
 235         /** @var bool */
 236         public $mTokenOkExceptSuffix = false;
 237
 238         /** @var bool */
 239         public $mTriedSave = false;
 240
 241         /** @var bool */
 242         public $incompleteForm = false;
 243
 244         /** @var bool */
 245         public $tooBig = false;
 246
 247         /** @var bool */
 248         public $kblength = false;
 249
 250         /** @var bool */
 251         public $missingComment = false;
 252
 253         /** @var bool */
 254         public $missingSummary = false;
 255
 256         /** @var bool */
 257         public $allowBlankSummary = false;
 258
 259         /** @var bool */
 260         protected $blankArticle = false;
 261
 262         /** @var bool */
 263         protected $allowBlankArticle = false;
 264
 265         /** @var bool */
 266         protected $selfRedirect = false;
 267
 268         /** @var bool */
 269         protected $allowSelfRedirect = false;
 270
 271         /** @var string */
 272         public $autoSumm = '';
 273
 274         /** @var string */
 275         public $hookError = '';
 276
 277         /** @var ParserOutput */
 278         public $mParserOutput;
 279
 280         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 281         public $hasPresetSummary = false;
 282
 283         /** @var bool */
 284         public $mBaseRevision = false;
 285
 286         /** @var bool */
 287         public $mShowSummaryField = true;
 288
 289         # Form values
 290
 291         /** @var bool */
 292         public $save = false;
 293
 294         /** @var bool */
 295         public $preview = false;
 296
 297         /** @var bool */
 298         public $diff = false;
 299
 300         /** @var bool */
 301         public $minoredit = false;
 302
 303         /** @var bool */
 304         public $watchthis = false;
 305
 306         /** @var bool */
 307         public $recreate = false;
 308
 309         /** @var string */
 310         public $textbox1 = '';
 311
 312         /** @var string */
 313         public $textbox2 = '';
 314
 315         /** @var string */
 316         public $summary = '';
 317
 318         /** @var bool */
 319         public $nosummary = false;
 320
 321         /** @var string */
 322         public $edittime = '';
 323
 324         /** @var string */
 325         public $section = '';
 326
 327         /** @var string */
 328         public $sectiontitle = '';
 329
 330         /** @var string */
 331         public $starttime = '';
 332
 333         /** @var int */
 334         public $oldid = 0;
 335
 336         /** @var int */
 337         public $parentRevId = 0;
 338
 339         /** @var string */
 340         public $editintro = '';
 341
 342         /** @var null */
 343         public $scrolltop = null;
 344
 345         /** @var bool */
 346         public $bot = true;
 347
 348         /** @var null|string */
 349         public $contentModel = null;
 350
 351         /** @var null|string */
 352         public $contentFormat = null;
 353
 354         # Placeholders for text injection by hooks (must be HTML)
 355         # extensions should take care to _append_ to the present value
 356
 357         /** @var string Before even the preview */
 358         public $editFormPageTop = '';
 359         public $editFormTextTop = '';
 360         public $editFormTextBeforeContent = '';
 361         public $editFormTextAfterWarn = '';
 362         public $editFormTextAfterTools = '';
 363         public $editFormTextBottom = '';
 364         public $editFormTextAfterContent = '';
 365         public $previewTextAfterContent = '';
 366         public $mPreloadContent = null;
 367
 368         /* $didSave should be set to true whenever an article was successfully altered. */
 369         public $didSave = false;
 370         public $undidRev = 0;
 371
 372         public $suppressIntro = false;
 373
 374         /** @var bool Set to true to allow editing of non-text content types. */
 375         public $allowNonTextContent = false;
 376
 377         /** @var bool */
 378         protected $edit;
 379
 380         /** @var bool */
 381         public $live;
 382
 383         /**
 384          * @param Article $article
 385          */
 386         public function __construct( Article $article ) {
 387                 $this->mArticle = $article;
 388                 $this->mTitle = $article->getTitle();
 389
 390                 $this->contentModel = $this->mTitle->getContentModel();
 391
 392                 $handler = ContentHandler::getForModelID( $this->contentModel );
 393                 $this->contentFormat = $handler->getDefaultFormat();
 394         }
 395
 396         /**
 397          * @return Article
 398          */
 399         public function getArticle() {
 400                 return $this->mArticle;
 401         }
 402
 403         /**
 404          * @since 1.19
 405          * @return Title
 406          */
 407         public function getTitle() {
 408                 return $this->mTitle;
 409         }
 410
 411         /**
 412          * Set the context Title object
 413          *
 414          * @param Title|null $title Title object or null
 415          */
 416         public function setContextTitle( $title ) {
 417                 $this->mContextTitle = $title;
 418         }
 419
 420         /**
 421          * Get the context title object.
 422          * If not set, $wgTitle will be returned. This behavior might change in
 423          * the future to return $this->mTitle instead.
 424          *
 425          * @return Title
 426          */
 427         public function getContextTitle() {
 428                 if ( is_null( $this->mContextTitle ) ) {
 429                         global $wgTitle;
 430                         return $wgTitle;
 431                 } else {
 432                         return $this->mContextTitle;
 433                 }
 434         }
 435
 436         /**
 437          * Returns if the given content model is editable.
 438          *
 439          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 440          * @return bool
 441          * @throws MWException If $modelId has no known handler
 442          */
 443         public function isSupportedContentModel( $modelId ) {
 444                 return $this->allowNonTextContent ||
 445                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 446         }
 447
 448         function submit() {
 449                 $this->edit();
 450         }
 451
 452         /**
 453          * This is the function that gets called for "action=edit". It
 454          * sets up various member variables, then passes execution to
 455          * another function, usually showEditForm()
 456          *
 457          * The edit form is self-submitting, so that when things like
 458          * preview and edit conflicts occur, we get the same form back
 459          * with the extra stuff added.  Only when the final submission
 460          * is made and all is well do we actually save and redirect to
 461          * the newly-edited page.
 462          */
 463         function edit() {
 464                 global $wgOut, $wgRequest, $wgUser;
 465                 // Allow extensions to modify/prevent this form or submission
 466                 if ( !Hooks::run( 'AlternateEdit', array( $this ) ) ) {
 467                         return;
 468                 }
 469
 470                 wfProfileIn( __METHOD__ );
 471                 wfDebug( __METHOD__ . ": enter\n" );
 472
 473                 // If they used redlink=1 and the page exists, redirect to the main article
 474                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 475                         $wgOut->redirect( $this->mTitle->getFullURL() );
 476                         wfProfileOut( __METHOD__ );
 477                         return;
 478                 }
 479
 480                 $this->importFormData( $wgRequest );
 481                 $this->firsttime = false;
 482
 483                 if ( $this->live ) {
 484                         $this->livePreview();
 485                         wfProfileOut( __METHOD__ );
 486                         return;
 487                 }
 488
 489                 if ( wfReadOnly() && $this->save ) {
 490                         // Force preview
 491                         $this->save = false;
 492                         $this->preview = true;
 493                 }
 494
 495                 if ( $this->save ) {
 496                         $this->formtype = 'save';
 497                 } elseif ( $this->preview ) {
 498                         $this->formtype = 'preview';
 499                 } elseif ( $this->diff ) {
 500                         $this->formtype = 'diff';
 501                 } else { # First time through
 502                         $this->firsttime = true;
 503                         if ( $this->previewOnOpen() ) {
 504                                 $this->formtype = 'preview';
 505                         } else {
 506                                 $this->formtype = 'initial';
 507                         }
 508                 }
 509
 510                 $permErrors = $this->getEditPermissionErrors();
 511                 if ( $permErrors ) {
 512                         wfDebug( __METHOD__ . ": User can't edit\n" );
 513                         // Auto-block user's IP if the account was "hard" blocked
 514                         $wgUser->spreadAnyEditBlock();
 515
 516                         $this->displayPermissionsError( $permErrors );
 517
 518                         wfProfileOut( __METHOD__ );
 519                         return;
 520                 }
 521
 522                 wfProfileIn( __METHOD__ . "-business-end" );
 523
 524                 $this->isConflict = false;
 525                 // css / js subpages of user pages get a special treatment
 526                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 527                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 528                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 529                 // @todo FIXME: Silly assignment.
 530                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 531
 532                 # Show applicable editing introductions
 533                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 534                         $this->showIntro();
 535                 }
 536
 537                 # Attempt submission here.  This will check for edit conflicts,
 538                 # and redundantly check for locked database, blocked IPs, etc.
 539                 # that edit() already checked just in case someone tries to sneak
 540                 # in the back door with a hand-edited submission URL.
 541
 542                 if ( 'save' == $this->formtype ) {
 543                         if ( !$this->attemptSave() ) {
 544                                 wfProfileOut( __METHOD__ . "-business-end" );
 545                                 wfProfileOut( __METHOD__ );
 546                                 return;
 547                         }
 548                 }
 549
 550                 # First time through: get contents, set time for conflict
 551                 # checking, etc.
 552                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 553                         if ( $this->initialiseForm() === false ) {
 554                                 $this->noSuchSectionPage();
 555                                 wfProfileOut( __METHOD__ . "-business-end" );
 556                                 wfProfileOut( __METHOD__ );
 557                                 return;
 558                         }
 559
 560                         if ( !$this->mTitle->getArticleID() ) {
 561                                 Hooks::run( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 562                         } else {
 563                                 Hooks::run( 'EditFormInitialText', array( $this ) );
 564                         }
 565
 566                 }
 567
 568                 $this->showEditForm();
 569                 wfProfileOut( __METHOD__ . "-business-end" );
 570                 wfProfileOut( __METHOD__ );
 571         }
 572
 573         /**
 574          * @return array
 575          */
 576         protected function getEditPermissionErrors() {
 577                 global $wgUser;
 578                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 579                 # Can this title be created?
 580                 if ( !$this->mTitle->exists() ) {
 581                         $permErrors = array_merge( $permErrors,
 582                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 583                 }
 584                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 585                 $remove = array();
 586                 foreach ( $permErrors as $error ) {
 587                         if ( ( $this->preview || $this->diff )
 588                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 589                         ) {
 590                                 $remove[] = $error;
 591                         }
 592                 }
 593                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 594                 return $permErrors;
 595         }
 596
 597         /**
 598          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 599          * but with the following differences:
 600          * - If redlink=1, the user will be redirected to the page
 601          * - If there is content to display or the error occurs while either saving,
 602          *   previewing or showing the difference, it will be a
 603          *   "View source for ..." page displaying the source code after the error message.
 604          *
 605          * @since 1.19
 606          * @param array $permErrors Array of permissions errors, as returned by
 607          *    Title::getUserPermissionsErrors().
 608          * @throws PermissionsError
 609          */
 610         protected function displayPermissionsError( array $permErrors ) {
 611                 global $wgRequest, $wgOut;
 612
 613                 if ( $wgRequest->getBool( 'redlink' ) ) {
 614                         // The edit page was reached via a red link.
 615                         // Redirect to the article page and let them click the edit tab if
 616                         // they really want a permission error.
 617                         $wgOut->redirect( $this->mTitle->getFullURL() );
 618                         return;
 619                 }
 620
 621                 $content = $this->getContentObject();
 622
 623                 # Use the normal message if there's nothing to display
 624                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 625                         $action = $this->mTitle->exists() ? 'edit' :
 626                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 627                         throw new PermissionsError( $action, $permErrors );
 628                 }
 629
 630                 Hooks::run( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 631
 632                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 633                 $wgOut->setPageTitle( wfMessage(
 634                         'viewsource-title',
 635                         $this->getContextTitle()->getPrefixedText()
 636                 ) );
 637                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 638                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 639                 $wgOut->addHTML( "<hr />\n" );
 640
 641                 # If the user made changes, preserve them when showing the markup
 642                 # (This happens when a user is blocked during edit, for instance)
 643                 if ( !$this->firsttime ) {
 644                         $text = $this->textbox1;
 645                         $wgOut->addWikiMsg( 'viewyourtext' );
 646                 } else {
 647                         $text = $this->toEditText( $content );
 648                         $wgOut->addWikiMsg( 'viewsourcetext' );
 649                 }
 650
 651                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 652
 653                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 654                         Linker::formatTemplates( $this->getTemplates() ) ) );
 655
 656                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 657
 658                 if ( $this->mTitle->exists() ) {
 659                         $wgOut->returnToMain( null, $this->mTitle );
 660                 }
 661         }
 662
 663         /**
 664          * Should we show a preview when the edit form is first shown?
 665          *
 666          * @return bool
 667          */
 668         protected function previewOnOpen() {
 669                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 670                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 671                         // Explicit override from request
 672                         return true;
 673                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 674                         // Explicit override from request
 675                         return false;
 676                 } elseif ( $this->section == 'new' ) {
 677                         // Nothing *to* preview for new sections
 678                         return false;
 679                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 680                         && $wgUser->getOption( 'previewonfirst' )
 681                 ) {
 682                         // Standard preference behavior
 683                         return true;
 684                 } elseif ( !$this->mTitle->exists()
 685                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 686                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 687                 ) {
 688                         // Categories are special
 689                         return true;
 690                 } else {
 691                         return false;
 692                 }
 693         }
 694
 695         /**
 696          * Checks whether the user entered a skin name in uppercase,
 697          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 698          *
 699          * @return bool
 700          */
 701         protected function isWrongCaseCssJsPage() {
 702                 if ( $this->mTitle->isCssJsSubpage() ) {
 703                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 704                         $skins = array_merge(
 705                                 array_keys( Skin::getSkinNames() ),
 706                                 array( 'common' )
 707                         );
 708                         return !in_array( $name, $skins )
 709                                 && in_array( strtolower( $name ), $skins );
 710                 } else {
 711                         return false;
 712                 }
 713         }
 714
 715         /**
 716          * Returns whether section editing is supported for the current page.
 717          * Subclasses may override this to replace the default behavior, which is
 718          * to check ContentHandler::supportsSections.
 719          *
 720          * @return bool True if this edit page supports sections, false otherwise.
 721          */
 722         protected function isSectionEditSupported() {
 723                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 724                 return $contentHandler->supportsSections();
 725         }
 726
 727         /**
 728          * This function collects the form data and uses it to populate various member variables.
 729          * @param WebRequest $request
 730          * @throws ErrorPageError
 731          */
 732         function importFormData( &$request ) {
 733                 global $wgContLang, $wgUser;
 734
 735                 wfProfileIn( __METHOD__ );
 736
 737                 # Section edit can come from either the form or a link
 738                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 739
 740                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 741                         wfProfileOut( __METHOD__ );
 742                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 743                 }
 744
 745                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 746
 747                 if ( $request->wasPosted() ) {
 748                         # These fields need to be checked for encoding.
 749                         # Also remove trailing whitespace, but don't remove _initial_
 750                         # whitespace from the text boxes. This may be significant formatting.
 751                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 752                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 753                                 // Skip this if wpTextbox2 has input, it indicates that we came
 754                                 // from a conflict page with raw page text, not a custom form
 755                                 // modified by subclasses
 756                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 757                                 $textbox1 = $this->importContentFormData( $request );
 758                                 if ( $textbox1 !== null ) {
 759                                         $this->textbox1 = $textbox1;
 760                                 }
 761
 762                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 763                         }
 764
 765                         # Truncate for whole multibyte characters
 766                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 767
 768                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 769                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 770                         # section titles.
 771                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 772
 773                         # Treat sectiontitle the same way as summary.
 774                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 775                         # currently doing double duty as both edit summary and section title. Right now this
 776                         # is just to allow API edits to work around this limitation, but this should be
 777                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 778                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 779                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 780
 781                         $this->edittime = $request->getVal( 'wpEdittime' );
 782                         $this->starttime = $request->getVal( 'wpStarttime' );
 783
 784                         $undidRev = $request->getInt( 'wpUndidRevision' );
 785                         if ( $undidRev ) {
 786                                 $this->undidRev = $undidRev;
 787                         }
 788
 789                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 790
 791                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 792                                 // wpTextbox1 field is missing, possibly due to being "too big"
 793                                 // according to some filter rules such as Suhosin's setting for
 794                                 // suhosin.request.max_value_length (d'oh)
 795                                 $this->incompleteForm = true;
 796                         } else {
 797                                 // If we receive the last parameter of the request, we can fairly
 798                                 // claim the POST request has not been truncated.
 799
 800                                 // TODO: softened the check for cutover.  Once we determine
 801                                 // that it is safe, we should complete the transition by
 802                                 // removing the "edittime" clause.
 803                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 804                                         && is_null( $this->edittime ) );
 805                         }
 806                         if ( $this->incompleteForm ) {
 807                                 # If the form is incomplete, force to preview.
 808                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 809                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 810                                 $this->preview = true;
 811                         } else {
 812                                 /* Fallback for live preview */
 813                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 814                                 $this->diff = $request->getCheck( 'wpDiff' );
 815
 816                                 // Remember whether a save was requested, so we can indicate
 817                                 // if we forced preview due to session failure.
 818                                 $this->mTriedSave = !$this->preview;
 819
 820                                 if ( $this->tokenOk( $request ) ) {
 821                                         # Some browsers will not report any submit button
 822                                         # if the user hits enter in the comment box.
 823                                         # The unmarked state will be assumed to be a save,
 824                                         # if the form seems otherwise complete.
 825                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 826                                 } elseif ( $this->diff ) {
 827                                         # Failed token check, but only requested "Show Changes".
 828                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 829                                 } else {
 830                                         # Page might be a hack attempt posted from
 831                                         # an external site. Preview instead of saving.
 832                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 833                                         $this->preview = true;
 834                                 }
 835                         }
 836                         $this->save = !$this->preview && !$this->diff;
 837                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 838                                 $this->edittime = null;
 839                         }
 840
 841                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 842                                 $this->starttime = null;
 843                         }
 844
 845                         $this->recreate = $request->getCheck( 'wpRecreate' );
 846
 847                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 848                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 849
 850                         # Don't force edit summaries when a user is editing their own user or talk page
 851                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 852                                 && $this->mTitle->getText() == $wgUser->getName()
 853                         ) {
 854                                 $this->allowBlankSummary = true;
 855                         } else {
 856                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 857                                         || !$wgUser->getOption( 'forceeditsummary' );
 858                         }
 859
 860                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 861
 862                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 863                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 864                 } else {
 865                         # Not a posted form? Start with nothing.
 866                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 867                         $this->textbox1 = '';
 868                         $this->summary = '';
 869                         $this->sectiontitle = '';
 870                         $this->edittime = '';
 871                         $this->starttime = wfTimestampNow();
 872                         $this->edit = false;
 873                         $this->preview = false;
 874                         $this->save = false;
 875                         $this->diff = false;
 876                         $this->minoredit = false;
 877                         // Watch may be overridden by request parameters
 878                         $this->watchthis = $request->getBool( 'watchthis', false );
 879                         $this->recreate = false;
 880
 881                         // When creating a new section, we can preload a section title by passing it as the
 882                         // preloadtitle parameter in the URL (Bug 13100)
 883                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 884                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 885                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 886                                 $this->summary = $request->getVal( 'preloadtitle' );
 887                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 888                                 $this->summary = $request->getText( 'summary' );
 889                                 if ( $this->summary !== '' ) {
 890                                         $this->hasPresetSummary = true;
 891                                 }
 892                         }
 893
 894                         if ( $request->getVal( 'minor' ) ) {
 895                                 $this->minoredit = true;
 896                         }
 897                 }
 898
 899                 $this->oldid = $request->getInt( 'oldid' );
 900                 $this->parentRevId = $request->getInt( 'parentRevId' );
 901
 902                 $this->bot = $request->getBool( 'bot', true );
 903                 $this->nosummary = $request->getBool( 'nosummary' );
 904
 905                 // May be overridden by revision.
 906                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 907                 // May be overridden by revision.
 908                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 909
 910                 if ( !ContentHandler::getForModelID( $this->contentModel )
 911                         ->isSupportedFormat( $this->contentFormat )
 912                 ) {
 913                         throw new ErrorPageError(
 914                                 'editpage-notsupportedcontentformat-title',
 915                                 'editpage-notsupportedcontentformat-text',
 916                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 917                         );
 918                 }
 919
 920                 /**
 921                  * @todo Check if the desired model is allowed in this namespace, and if
 922                  *   a transition from the page's current model to the new model is
 923                  *   allowed.
 924                  */
 925
 926                 $this->live = $request->getCheck( 'live' );
 927                 $this->editintro = $request->getText( 'editintro',
 928                         // Custom edit intro for new sections
 929                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 930
 931                 // Allow extensions to modify form data
 932                 Hooks::run( 'EditPage::importFormData', array( $this, $request ) );
 933
 934                 wfProfileOut( __METHOD__ );
 935         }
 936
 937         /**
 938          * Subpage overridable method for extracting the page content data from the
 939          * posted form to be placed in $this->textbox1, if using customized input
 940          * this method should be overridden and return the page text that will be used
 941          * for saving, preview parsing and so on...
 942          *
 943          * @param WebRequest $request
 944          */
 945         protected function importContentFormData( &$request ) {
 946                 return; // Don't do anything, EditPage already extracted wpTextbox1
 947         }
 948
 949         /**
 950          * Initialise form fields in the object
 951          * Called on the first invocation, e.g. when a user clicks an edit link
 952          * @return bool If the requested section is valid
 953          */
 954         function initialiseForm() {
 955                 global $wgUser;
 956                 $this->edittime = $this->mArticle->getTimestamp();
 957
 958                 $content = $this->getContentObject( false ); #TODO: track content object?!
 959                 if ( $content === false ) {
 960                         return false;
 961                 }
 962                 $this->textbox1 = $this->toEditText( $content );
 963
 964                 // activate checkboxes if user wants them to be always active
 965                 # Sort out the "watch" checkbox
 966                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 967                         # Watch all edits
 968                         $this->watchthis = true;
 969                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 970                         # Watch creations
 971                         $this->watchthis = true;
 972                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 973                         # Already watched
 974                         $this->watchthis = true;
 975                 }
 976                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 977                         $this->minoredit = true;
 978                 }
 979                 if ( $this->textbox1 === false ) {
 980                         return false;
 981                 }
 982                 return true;
 983         }
 984
 985         /**
 986          * @param Content|null $def_content The default value to return
 987          *
 988          * @return Content|null Content on success, $def_content for invalid sections
 989          *
 990          * @since 1.21
 991          */
 992         protected function getContentObject( $def_content = null ) {
 993                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 994
 995                 wfProfileIn( __METHOD__ );
 996
 997                 $content = false;
 998
 999                 // For message page not locally set, use the i18n message.
1000                 // For other non-existent articles, use preload text if any.
1001                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1002                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1003                                 # If this is a system message, get the default text.
1004                                 $msg = $this->mTitle->getDefaultMessageText();
1005
1006                                 $content = $this->toEditContent( $msg );
1007                         }
1008                         if ( $content === false ) {
1009                                 # If requested, preload some text.
1010                                 $preload = $wgRequest->getVal( 'preload',
1011                                         // Custom preload text for new sections
1012                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1013                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1014
1015                                 $content = $this->getPreloadedContent( $preload, $params );
1016                         }
1017                 // For existing pages, get text based on "undo" or section parameters.
1018                 } else {
1019                         if ( $this->section != '' ) {
1020                                 // Get section edit text (returns $def_text for invalid sections)
1021                                 $orig = $this->getOriginalContent( $wgUser );
1022                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1023
1024                                 if ( !$content ) {
1025                                         $content = $def_content;
1026                                 }
1027                         } else {
1028                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1029                                 $undo = $wgRequest->getInt( 'undo' );
1030
1031                                 if ( $undo > 0 && $undoafter > 0 ) {
1032
1033                                         $undorev = Revision::newFromId( $undo );
1034                                         $oldrev = Revision::newFromId( $undoafter );
1035
1036                                         # Sanity check, make sure it's the right page,
1037                                         # the revisions exist and they were not deleted.
1038                                         # Otherwise, $content will be left as-is.
1039                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1040                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1041                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1042
1043                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1044
1045                                                 if ( $content === false ) {
1046                                                         # Warn the user that something went wrong
1047                                                         $undoMsg = 'failure';
1048                                                 } else {
1049                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1050                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1051                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1052
1053                                                         if ( $newContent->equals( $oldContent ) ) {
1054                                                                 # Tell the user that the undo results in no change,
1055                                                                 # i.e. the revisions were already undone.
1056                                                                 $undoMsg = 'nochange';
1057                                                                 $content = false;
1058                                                         } else {
1059                                                                 # Inform the user of our success and set an automatic edit summary
1060                                                                 $undoMsg = 'success';
1061
1062                                                                 # If we just undid one rev, use an autosummary
1063                                                                 $firstrev = $oldrev->getNext();
1064                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1065                                                                         $userText = $undorev->getUserText();
1066                                                                         if ( $userText === '' ) {
1067                                                                                 $undoSummary = wfMessage(
1068                                                                                         'undo-summary-username-hidden',
1069                                                                                         $undo
1070                                                                                 )->inContentLanguage()->text();
1071                                                                         } else {
1072                                                                                 $undoSummary = wfMessage(
1073                                                                                         'undo-summary',
1074                                                                                         $undo,
1075                                                                                         $userText
1076                                                                                 )->inContentLanguage()->text();
1077                                                                         }
1078                                                                         if ( $this->summary === '' ) {
1079                                                                                 $this->summary = $undoSummary;
1080                                                                         } else {
1081                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1082                                                                                         ->inContentLanguage()->text() . $this->summary;
1083                                                                         }
1084                                                                         $this->undidRev = $undo;
1085                                                                 }
1086                                                                 $this->formtype = 'diff';
1087                                                         }
1088                                                 }
1089                                         } else {
1090                                                 // Failed basic sanity checks.
1091                                                 // Older revisions may have been removed since the link
1092                                                 // was created, or we may simply have got bogus input.
1093                                                 $undoMsg = 'norev';
1094                                         }
1095
1096                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1097                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1098                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1099                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1100                                 }
1101
1102                                 if ( $content === false ) {
1103                                         $content = $this->getOriginalContent( $wgUser );
1104                                 }
1105                         }
1106                 }
1107
1108                 wfProfileOut( __METHOD__ );
1109                 return $content;
1110         }
1111
1112         /**
1113          * Get the content of the wanted revision, without section extraction.
1114          *
1115          * The result of this function can be used to compare user's input with
1116          * section replaced in its context (using WikiPage::replaceSection())
1117          * to the original text of the edit.
1118          *
1119          * This differs from Article::getContent() that when a missing revision is
1120          * encountered the result will be null and not the
1121          * 'missing-revision' message.
1122          *
1123          * @since 1.19
1124          * @param User $user The user to get the revision for
1125          * @return Content|null
1126          */
1127         private function getOriginalContent( User $user ) {
1128                 if ( $this->section == 'new' ) {
1129                         return $this->getCurrentContent();
1130                 }
1131                 $revision = $this->mArticle->getRevisionFetched();
1132                 if ( $revision === null ) {
1133                         if ( !$this->contentModel ) {
1134                                 $this->contentModel = $this->getTitle()->getContentModel();
1135                         }
1136                         $handler = ContentHandler::getForModelID( $this->contentModel );
1137
1138                         return $handler->makeEmptyContent();
1139                 }
1140                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1141                 return $content;
1142         }
1143
1144         /**
1145          * Get the current content of the page. This is basically similar to
1146          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1147          * content object is returned instead of null.
1148          *
1149          * @since 1.21
1150          * @return Content
1151          */
1152         protected function getCurrentContent() {
1153                 $rev = $this->mArticle->getRevision();
1154                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1155
1156                 if ( $content === false || $content === null ) {
1157                         if ( !$this->contentModel ) {
1158                                 $this->contentModel = $this->getTitle()->getContentModel();
1159                         }
1160                         $handler = ContentHandler::getForModelID( $this->contentModel );
1161
1162                         return $handler->makeEmptyContent();
1163                 } else {
1164                         # nasty side-effect, but needed for consistency
1165                         $this->contentModel = $rev->getContentModel();
1166                         $this->contentFormat = $rev->getContentFormat();
1167
1168                         return $content;
1169                 }
1170         }
1171
1172         /**
1173          * Use this method before edit() to preload some content into the edit box
1174          *
1175          * @param Content $content
1176          *
1177          * @since 1.21
1178          */
1179         public function setPreloadedContent( Content $content ) {
1180                 $this->mPreloadContent = $content;
1181         }
1182
1183         /**
1184          * Get the contents to be preloaded into the box, either set by
1185          * an earlier setPreloadText() or by loading the given page.
1186          *
1187          * @param string $preload Representing the title to preload from.
1188          * @param array $params Parameters to use (interface-message style) in the preloaded text
1189          *
1190          * @return Content
1191          *
1192          * @since 1.21
1193          */
1194         protected function getPreloadedContent( $preload, $params = array() ) {
1195                 global $wgUser;
1196
1197                 if ( !empty( $this->mPreloadContent ) ) {
1198                         return $this->mPreloadContent;
1199                 }
1200
1201                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1202
1203                 if ( $preload === '' ) {
1204                         return $handler->makeEmptyContent();
1205                 }
1206
1207                 $title = Title::newFromText( $preload );
1208                 # Check for existence to avoid getting MediaWiki:Noarticletext
1209                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1210                         //TODO: somehow show a warning to the user!
1211                         return $handler->makeEmptyContent();
1212                 }
1213
1214                 $page = WikiPage::factory( $title );
1215                 if ( $page->isRedirect() ) {
1216                         $title = $page->getRedirectTarget();
1217                         # Same as before
1218                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1219                                 //TODO: somehow show a warning to the user!
1220                                 return $handler->makeEmptyContent();
1221                         }
1222                         $page = WikiPage::factory( $title );
1223                 }
1224
1225                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1226                 $content = $page->getContent( Revision::RAW );
1227
1228                 if ( !$content ) {
1229                         //TODO: somehow show a warning to the user!
1230                         return $handler->makeEmptyContent();
1231                 }
1232
1233                 if ( $content->getModel() !== $handler->getModelID() ) {
1234                         $converted = $content->convert( $handler->getModelID() );
1235
1236                         if ( !$converted ) {
1237                                 //TODO: somehow show a warning to the user!
1238                                 wfDebug( "Attempt to preload incompatible content: "
1239                                                 . "can't convert " . $content->getModel()
1240                                                 . " to " . $handler->getModelID() );
1241
1242                                 return $handler->makeEmptyContent();
1243                         }
1244
1245                         $content = $converted;
1246                 }
1247
1248                 return $content->preloadTransform( $title, $parserOptions, $params );
1249         }
1250
1251         /**
1252          * Make sure the form isn't faking a user's credentials.
1253          *
1254          * @param WebRequest $request
1255          * @return bool
1256          * @private
1257          */
1258         function tokenOk( &$request ) {
1259                 global $wgUser;
1260                 $token = $request->getVal( 'wpEditToken' );
1261                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1262                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1263                 return $this->mTokenOk;
1264         }
1265
1266         /**
1267          * Sets post-edit cookie indicating the user just saved a particular revision.
1268          *
1269          * This uses a temporary cookie for each revision ID so separate saves will never
1270          * interfere with each other.
1271          *
1272          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1273          * the redirect.  It must be clearable by JavaScript code, so it must not be
1274          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1275          * variable.
1276          *
1277          * If the variable were set on the server, it would be cached, which is unwanted
1278          * since the post-edit state should only apply to the load right after the save.
1279          *
1280          * @param int $statusValue The status value (to check for new article status)
1281          */
1282         protected function setPostEditCookie( $statusValue ) {
1283                 $revisionId = $this->mArticle->getLatest();
1284                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1285
1286                 $val = 'saved';
1287                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1288                         $val = 'created';
1289                 } elseif ( $this->oldid ) {
1290                         $val = 'restored';
1291                 }
1292
1293                 $response = RequestContext::getMain()->getRequest()->response();
1294                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1295                         'httpOnly' => false,
1296                 ) );
1297         }
1298
1299         /**
1300          * Attempt submission
1301          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1302          * @return bool False if output is done, true if the rest of the form should be displayed
1303          */
1304         public function attemptSave() {
1305                 global $wgUser;
1306
1307                 $resultDetails = false;
1308                 # Allow bots to exempt some edits from bot flagging
1309                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1310                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1311
1312                 return $this->handleStatus( $status, $resultDetails );
1313         }
1314
1315         /**
1316          * Handle status, such as after attempt save
1317          *
1318          * @param Status $status
1319          * @param array|bool $resultDetails
1320          *
1321          * @throws ErrorPageError
1322          * @return bool False, if output is done, true if rest of the form should be displayed
1323          */
1324         private function handleStatus( Status $status, $resultDetails ) {
1325                 global $wgUser, $wgOut;
1326
1327                 /**
1328                  * @todo FIXME: once the interface for internalAttemptSave() is made
1329                  *   nicer, this should use the message in $status
1330                  */
1331                 if ( $status->value == self::AS_SUCCESS_UPDATE
1332                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1333                 ) {
1334                         $this->didSave = true;
1335                         if ( !$resultDetails['nullEdit'] ) {
1336                                 $this->setPostEditCookie( $status->value );
1337                         }
1338                 }
1339
1340                 switch ( $status->value ) {
1341                         case self::AS_HOOK_ERROR_EXPECTED:
1342                         case self::AS_CONTENT_TOO_BIG:
1343                         case self::AS_ARTICLE_WAS_DELETED:
1344                         case self::AS_CONFLICT_DETECTED:
1345                         case self::AS_SUMMARY_NEEDED:
1346                         case self::AS_TEXTBOX_EMPTY:
1347                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1348                         case self::AS_END:
1349                         case self::AS_BLANK_ARTICLE:
1350                         case self::AS_SELF_REDIRECT:
1351                                 return true;
1352
1353                         case self::AS_HOOK_ERROR:
1354                                 return false;
1355
1356                         case self::AS_PARSE_ERROR:
1357                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1358                                 return true;
1359
1360                         case self::AS_SUCCESS_NEW_ARTICLE:
1361                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1362                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1363                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1364                                 return false;
1365
1366                         case self::AS_SUCCESS_UPDATE:
1367                                 $extraQuery = '';
1368                                 $sectionanchor = $resultDetails['sectionanchor'];
1369
1370                                 // Give extensions a chance to modify URL query on update
1371                                 Hooks::run(
1372                                         'ArticleUpdateBeforeRedirect',
1373                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1374                                 );
1375
1376                                 if ( $resultDetails['redirect'] ) {
1377                                         if ( $extraQuery == '' ) {
1378                                                 $extraQuery = 'redirect=no';
1379                                         } else {
1380                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1381                                         }
1382                                 }
1383                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1384                                 return false;
1385
1386                         case self::AS_SPAM_ERROR:
1387                                 $this->spamPageWithContent( $resultDetails['spam'] );
1388                                 return false;
1389
1390                         case self::AS_BLOCKED_PAGE_FOR_USER:
1391                                 throw new UserBlockedError( $wgUser->getBlock() );
1392
1393                         case self::AS_IMAGE_REDIRECT_ANON:
1394                         case self::AS_IMAGE_REDIRECT_LOGGED:
1395                                 throw new PermissionsError( 'upload' );
1396
1397                         case self::AS_READ_ONLY_PAGE_ANON:
1398                         case self::AS_READ_ONLY_PAGE_LOGGED:
1399                                 throw new PermissionsError( 'edit' );
1400
1401                         case self::AS_READ_ONLY_PAGE:
1402                                 throw new ReadOnlyError;
1403
1404                         case self::AS_RATE_LIMITED:
1405                                 throw new ThrottledError();
1406
1407                         case self::AS_NO_CREATE_PERMISSION:
1408                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1409                                 throw new PermissionsError( $permission );
1410
1411                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1412                                 throw new PermissionsError( 'editcontentmodel' );
1413
1414                         default:
1415                                 // We don't recognize $status->value. The only way that can happen
1416                                 // is if an extension hook aborted from inside ArticleSave.
1417                                 // Render the status object into $this->hookError
1418                                 // FIXME this sucks, we should just use the Status object throughout
1419                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1420                                         '</div>';
1421                                 return true;
1422                 }
1423         }
1424
1425         /**
1426          * Run hooks that can filter edits just before they get saved.
1427          *
1428          * @param Content $content The Content to filter.
1429          * @param Status $status For reporting the outcome to the caller
1430          * @param User $user The user performing the edit
1431          *
1432          * @return bool
1433          */
1434         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1435                 // Run old style post-section-merge edit filter
1436                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1437                         array( $this, $content, &$this->hookError, $this->summary ) )
1438                 ) {
1439                         # Error messages etc. could be handled within the hook...
1440                         $status->fatal( 'hookaborted' );
1441                         $status->value = self::AS_HOOK_ERROR;
1442                         return false;
1443                 } elseif ( $this->hookError != '' ) {
1444                         # ...or the hook could be expecting us to produce an error
1445                         $status->fatal( 'hookaborted' );
1446                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1447                         return false;
1448                 }
1449
1450                 // Run new style post-section-merge edit filter
1451                 if ( !Hooks::run( 'EditFilterMergedContent',
1452                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1453                                 $user, $this->minoredit ) )
1454                 ) {
1455                         # Error messages etc. could be handled within the hook...
1456                         if ( $status->isGood() ) {
1457                                 $status->fatal( 'hookaborted' );
1458                                 // Not setting $this->hookError here is a hack to allow the hook
1459                                 // to cause a return to the edit page without $this->hookError
1460                                 // being set. This is used by ConfirmEdit to display a captcha
1461                                 // without any error message cruft.
1462                         } else {
1463                                 $this->hookError = $status->getWikiText();
1464                         }
1465                         // Use the existing $status->value if the hook set it
1466                         if ( !$status->value ) {
1467                                 $status->value = self::AS_HOOK_ERROR;
1468                         }
1469                         return false;
1470                 } elseif ( !$status->isOK() ) {
1471                         # ...or the hook could be expecting us to produce an error
1472                         // FIXME this sucks, we should just use the Status object throughout
1473                         $this->hookError = $status->getWikiText();
1474                         $status->fatal( 'hookaborted' );
1475                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1476                         return false;
1477                 }
1478
1479                 return true;
1480         }
1481
1482         /**
1483          * Return the summary to be used for a new section.
1484          *
1485          * @param string $sectionanchor Set to the section anchor text
1486          * @return string
1487          */
1488         private function newSectionSummary( &$sectionanchor = null ) {
1489                 global $wgParser;
1490
1491                 if ( $this->sectiontitle !== '' ) {
1492                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1493                         // If no edit summary was specified, create one automatically from the section
1494                         // title and have it link to the new section. Otherwise, respect the summary as
1495                         // passed.
1496                         if ( $this->summary === '' ) {
1497                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1498                                 return wfMessage( 'newsectionsummary' )
1499                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1500                         }
1501                 } elseif ( $this->summary !== '' ) {
1502                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1503                         # This is a new section, so create a link to the new section
1504                         # in the revision summary.
1505                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1506                         return wfMessage( 'newsectionsummary' )
1507                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1508                 }
1509                 return $this->summary;
1510         }
1511
1512         /**
1513          * Attempt submission (no UI)
1514          *
1515          * @param array $result Array to add statuses to, currently with the
1516          *   possible keys:
1517          *   - spam (string): Spam string from content if any spam is detected by
1518          *     matchSpamRegex.
1519          *   - sectionanchor (string): Section anchor for a section save.
1520          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1521          *     false otherwise.
1522          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1523          *     revision is a redirect.
1524          * @param bool $bot True if edit is being made under the bot right.
1525          *
1526          * @return Status Status object, possibly with a message, but always with
1527          *   one of the AS_* constants in $status->value,
1528          *
1529          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1530          *   various error display idiosyncrasies. There are also lots of cases
1531          *   where error metadata is set in the object and retrieved later instead
1532          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1533          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1534          * time.
1535          */
1536         function internalAttemptSave( &$result, $bot = false ) {
1537                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1538
1539                 $status = Status::newGood();
1540
1541                 wfProfileIn( __METHOD__ );
1542                 wfProfileIn( __METHOD__ . '-checks' );
1543
1544                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1545                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1546                         $status->fatal( 'hookaborted' );
1547                         $status->value = self::AS_HOOK_ERROR;
1548                         wfProfileOut( __METHOD__ . '-checks' );
1549                         wfProfileOut( __METHOD__ );
1550                         return $status;
1551                 }
1552
1553                 $spam = $wgRequest->getText( 'wpAntispam' );
1554                 if ( $spam !== '' ) {
1555                         wfDebugLog(
1556                                 'SimpleAntiSpam',
1557                                 $wgUser->getName() .
1558                                 ' editing "' .
1559                                 $this->mTitle->getPrefixedText() .
1560                                 '" submitted bogus field "' .
1561                                 $spam .
1562                                 '"'
1563                         );
1564                         $status->fatal( 'spamprotectionmatch', false );
1565                         $status->value = self::AS_SPAM_ERROR;
1566                         wfProfileOut( __METHOD__ . '-checks' );
1567                         wfProfileOut( __METHOD__ );
1568                         return $status;
1569                 }
1570
1571                 try {
1572                         # Construct Content object
1573                         $textbox_content = $this->toEditContent( $this->textbox1 );
1574                 } catch ( MWContentSerializationException $ex ) {
1575                         $status->fatal(
1576                                 'content-failed-to-parse',
1577                                 $this->contentModel,
1578                                 $this->contentFormat,
1579                                 $ex->getMessage()
1580                         );
1581                         $status->value = self::AS_PARSE_ERROR;
1582                         wfProfileOut( __METHOD__ . '-checks' );
1583                         wfProfileOut( __METHOD__ );
1584                         return $status;
1585                 }
1586
1587                 # Check image redirect
1588                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1589                         $textbox_content->isRedirect() &&
1590                         !$wgUser->isAllowed( 'upload' )
1591                 ) {
1592                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1593                                 $status->setResult( false, $code );
1594
1595                                 wfProfileOut( __METHOD__ . '-checks' );
1596                                 wfProfileOut( __METHOD__ );
1597
1598                                 return $status;
1599                 }
1600
1601                 # Check for spam
1602                 $match = self::matchSummarySpamRegex( $this->summary );
1603                 if ( $match === false && $this->section == 'new' ) {
1604                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1605                         # regular summaries, it is added to the actual wikitext.
1606                         if ( $this->sectiontitle !== '' ) {
1607                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1608                                 $match = self::matchSpamRegex( $this->sectiontitle );
1609                         } else {
1610                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1611                                 # is used with the 'summary' parameter.
1612                                 $match = self::matchSpamRegex( $this->summary );
1613                         }
1614                 }
1615                 if ( $match === false ) {
1616                         $match = self::matchSpamRegex( $this->textbox1 );
1617                 }
1618                 if ( $match !== false ) {
1619                         $result['spam'] = $match;
1620                         $ip = $wgRequest->getIP();
1621                         $pdbk = $this->mTitle->getPrefixedDBkey();
1622                         $match = str_replace( "\n", '', $match );
1623                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1624                         $status->fatal( 'spamprotectionmatch', $match );
1625                         $status->value = self::AS_SPAM_ERROR;
1626                         wfProfileOut( __METHOD__ . '-checks' );
1627                         wfProfileOut( __METHOD__ );
1628                         return $status;
1629                 }
1630                 if ( !Hooks::run(
1631                         'EditFilter',
1632                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1633                 ) {
1634                         # Error messages etc. could be handled within the hook...
1635                         $status->fatal( 'hookaborted' );
1636                         $status->value = self::AS_HOOK_ERROR;
1637                         wfProfileOut( __METHOD__ . '-checks' );
1638                         wfProfileOut( __METHOD__ );
1639                         return $status;
1640                 } elseif ( $this->hookError != '' ) {
1641                         # ...or the hook could be expecting us to produce an error
1642                         $status->fatal( 'hookaborted' );
1643                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1644                         wfProfileOut( __METHOD__ . '-checks' );
1645                         wfProfileOut( __METHOD__ );
1646                         return $status;
1647                 }
1648
1649                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1650                         // Auto-block user's IP if the account was "hard" blocked
1651                         $wgUser->spreadAnyEditBlock();
1652                         # Check block state against master, thus 'false'.
1653                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1654                         wfProfileOut( __METHOD__ . '-checks' );
1655                         wfProfileOut( __METHOD__ );
1656                         return $status;
1657                 }
1658
1659                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1660                 if ( $this->kblength > $wgMaxArticleSize ) {
1661                         // Error will be displayed by showEditForm()
1662                         $this->tooBig = true;
1663                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1664                         wfProfileOut( __METHOD__ . '-checks' );
1665                         wfProfileOut( __METHOD__ );
1666                         return $status;
1667                 }
1668
1669                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1670                         if ( $wgUser->isAnon() ) {
1671                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1672                                 wfProfileOut( __METHOD__ . '-checks' );
1673                                 wfProfileOut( __METHOD__ );
1674                                 return $status;
1675                         } else {
1676                                 $status->fatal( 'readonlytext' );
1677                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1678                                 wfProfileOut( __METHOD__ . '-checks' );
1679                                 wfProfileOut( __METHOD__ );
1680                                 return $status;
1681                         }
1682                 }
1683
1684                 if ( $this->contentModel !== $this->mTitle->getContentModel()
1685                         && !$wgUser->isAllowed( 'editcontentmodel' )
1686                 ) {
1687                         $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1688                         wfProfileOut( __METHOD__ . '-checks' );
1689                         wfProfileOut( __METHOD__ );
1690                         return $status;
1691                 }
1692
1693                 if ( wfReadOnly() ) {
1694                         $status->fatal( 'readonlytext' );
1695                         $status->value = self::AS_READ_ONLY_PAGE;
1696                         wfProfileOut( __METHOD__ . '-checks' );
1697                         wfProfileOut( __METHOD__ );
1698                         return $status;
1699                 }
1700                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1701                         $status->fatal( 'actionthrottledtext' );
1702                         $status->value = self::AS_RATE_LIMITED;
1703                         wfProfileOut( __METHOD__ . '-checks' );
1704                         wfProfileOut( __METHOD__ );
1705                         return $status;
1706                 }
1707
1708                 # If the article has been deleted while editing, don't save it without
1709                 # confirmation
1710                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1711                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1712                         wfProfileOut( __METHOD__ . '-checks' );
1713                         wfProfileOut( __METHOD__ );
1714                         return $status;
1715                 }
1716
1717                 wfProfileOut( __METHOD__ . '-checks' );
1718
1719                 # Load the page data from the master. If anything changes in the meantime,
1720                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1721                 $this->mArticle->loadPageData( 'fromdbmaster' );
1722                 $new = !$this->mArticle->exists();
1723
1724                 if ( $new ) {
1725                         // Late check for create permission, just in case *PARANOIA*
1726                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1727                                 $status->fatal( 'nocreatetext' );
1728                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1729                                 wfDebug( __METHOD__ . ": no create permission\n" );
1730                                 wfProfileOut( __METHOD__ );
1731                                 return $status;
1732                         }
1733
1734                         // Don't save a new page if it's blank or if it's a MediaWiki:
1735                         // message with content equivalent to default (allow empty pages
1736                         // in this case to disable messages, see bug 50124)
1737                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1738                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1739                                 $defaultText = $defaultMessageText;
1740                         } else {
1741                                 $defaultText = '';
1742                         }
1743
1744                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1745                                 $this->blankArticle = true;
1746                                 $status->fatal( 'blankarticle' );
1747                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1748                                 wfProfileOut( __METHOD__ );
1749                                 return $status;
1750                         }
1751
1752                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1753                                 wfProfileOut( __METHOD__ );
1754                                 return $status;
1755                         }
1756
1757                         $content = $textbox_content;
1758
1759                         $result['sectionanchor'] = '';
1760                         if ( $this->section == 'new' ) {
1761                                 if ( $this->sectiontitle !== '' ) {
1762                                         // Insert the section title above the content.
1763                                         $content = $content->addSectionHeader( $this->sectiontitle );
1764                                 } elseif ( $this->summary !== '' ) {
1765                                         // Insert the section title above the content.
1766                                         $content = $content->addSectionHeader( $this->summary );
1767                                 }
1768                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1769                         }
1770
1771                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1772
1773                 } else { # not $new
1774
1775                         # Article exists. Check for edit conflict.
1776
1777                         $this->mArticle->clear(); # Force reload of dates, etc.
1778                         $timestamp = $this->mArticle->getTimestamp();
1779
1780                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1781
1782                         if ( $timestamp != $this->edittime ) {
1783                                 $this->isConflict = true;
1784                                 if ( $this->section == 'new' ) {
1785                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1786                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1787                                         ) {
1788                                                 // Probably a duplicate submission of a new comment.
1789                                                 // This can happen when squid resends a request after
1790                                                 // a timeout but the first one actually went through.
1791                                                 wfDebug( __METHOD__
1792                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1793                                         } else {
1794                                                 // New comment; suppress conflict.
1795                                                 $this->isConflict = false;
1796                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1797                                         }
1798                                 } elseif ( $this->section == ''
1799                                         && Revision::userWasLastToEdit(
1800                                                 DB_MASTER, $this->mTitle->getArticleID(),
1801                                                 $wgUser->getId(), $this->edittime
1802                                         )
1803                                 ) {
1804                                         # Suppress edit conflict with self, except for section edits where merging is required.
1805                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1806                                         $this->isConflict = false;
1807                                 }
1808                         }
1809
1810                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1811                         if ( $this->sectiontitle !== '' ) {
1812                                 $sectionTitle = $this->sectiontitle;
1813                         } else {
1814                                 $sectionTitle = $this->summary;
1815                         }
1816
1817                         $content = null;
1818
1819                         if ( $this->isConflict ) {
1820                                 wfDebug( __METHOD__
1821                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1822                                         . " (article time '{$timestamp}')\n" );
1823
1824                                 $content = $this->mArticle->replaceSectionContent(
1825                                         $this->section,
1826                                         $textbox_content,
1827                                         $sectionTitle,
1828                                         $this->edittime
1829                                 );
1830                         } else {
1831                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1832                                 $content = $this->mArticle->replaceSectionContent(
1833                                         $this->section,
1834                                         $textbox_content,
1835                                         $sectionTitle
1836                                 );
1837                         }
1838
1839                         if ( is_null( $content ) ) {
1840                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1841                                 $this->isConflict = true;
1842                                 $content = $textbox_content; // do not try to merge here!
1843                         } elseif ( $this->isConflict ) {
1844                                 # Attempt merge
1845                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1846                                         // Successful merge! Maybe we should tell the user the good news?
1847                                         $this->isConflict = false;
1848                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1849                                 } else {
1850                                         $this->section = '';
1851                                         $this->textbox1 = ContentHandler::getContentText( $content );
1852                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1853                                 }
1854                         }
1855
1856                         if ( $this->isConflict ) {
1857                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1858                                 wfProfileOut( __METHOD__ );
1859                                 return $status;
1860                         }
1861
1862                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1863                                 wfProfileOut( __METHOD__ );
1864                                 return $status;
1865                         }
1866
1867                         if ( $this->section == 'new' ) {
1868                                 // Handle the user preference to force summaries here
1869                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1870                                         $this->missingSummary = true;
1871                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1872                                         $status->value = self::AS_SUMMARY_NEEDED;
1873                                         wfProfileOut( __METHOD__ );
1874                                         return $status;
1875                                 }
1876
1877                                 // Do not allow the user to post an empty comment
1878                                 if ( $this->textbox1 == '' ) {
1879                                         $this->missingComment = true;
1880                                         $status->fatal( 'missingcommenttext' );
1881                                         $status->value = self::AS_TEXTBOX_EMPTY;
1882                                         wfProfileOut( __METHOD__ );
1883                                         return $status;
1884                                 }
1885                         } elseif ( !$this->allowBlankSummary
1886                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1887                                 && !$content->isRedirect()
1888                                 && md5( $this->summary ) == $this->autoSumm
1889                         ) {
1890                                 $this->missingSummary = true;
1891                                 $status->fatal( 'missingsummary' );
1892                                 $status->value = self::AS_SUMMARY_NEEDED;
1893                                 wfProfileOut( __METHOD__ );
1894                                 return $status;
1895                         }
1896
1897                         # All's well
1898                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1899                         $sectionanchor = '';
1900                         if ( $this->section == 'new' ) {
1901                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1902                         } elseif ( $this->section != '' ) {
1903                                 # Try to get a section anchor from the section source, redirect
1904                                 # to edited section if header found.
1905                                 # XXX: Might be better to integrate this into Article::replaceSection
1906                                 # for duplicate heading checking and maybe parsing.
1907                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1908                                 # We can't deal with anchors, includes, html etc in the header for now,
1909                                 # headline would need to be parsed to improve this.
1910                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1911                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1912                                 }
1913                         }
1914                         $result['sectionanchor'] = $sectionanchor;
1915                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1916
1917                         // Save errors may fall down to the edit form, but we've now
1918                         // merged the section into full text. Clear the section field
1919                         // so that later submission of conflict forms won't try to
1920                         // replace that into a duplicated mess.
1921                         $this->textbox1 = $this->toEditText( $content );
1922                         $this->section = '';
1923
1924                         $status->value = self::AS_SUCCESS_UPDATE;
1925                 }
1926
1927                 if ( !$this->allowSelfRedirect
1928                         && $content->isRedirect()
1929                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1930                 ) {
1931                         // If the page already redirects to itself, don't warn.
1932                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1933                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1934                                 $this->selfRedirect = true;
1935                                 $status->fatal( 'selfredirect' );
1936                                 $status->value = self::AS_SELF_REDIRECT;
1937                                 wfProfileOut( __METHOD__ );
1938                                 return $status;
1939                         }
1940                 }
1941
1942                 // Check for length errors again now that the section is merged in
1943                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1944                 if ( $this->kblength > $wgMaxArticleSize ) {
1945                         $this->tooBig = true;
1946                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1947                         wfProfileOut( __METHOD__ );
1948                         return $status;
1949                 }
1950
1951                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1952                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1953                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1954                         ( $bot ? EDIT_FORCE_BOT : 0 );
1955
1956                 $doEditStatus = $this->mArticle->doEditContent(
1957                         $content,
1958                         $this->summary,
1959                         $flags,
1960                         false,
1961                         null,
1962                         $content->getDefaultFormat()
1963                 );
1964
1965                 if ( !$doEditStatus->isOK() ) {
1966                         // Failure from doEdit()
1967                         // Show the edit conflict page for certain recognized errors from doEdit(),
1968                         // but don't show it for errors from extension hooks
1969                         $errors = $doEditStatus->getErrorsArray();
1970                         if ( in_array( $errors[0][0],
1971                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1972                         ) {
1973                                 $this->isConflict = true;
1974                                 // Destroys data doEdit() put in $status->value but who cares
1975                                 $doEditStatus->value = self::AS_END;
1976                         }
1977                         wfProfileOut( __METHOD__ );
1978                         return $doEditStatus;
1979                 }
1980
1981                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1982                 if ( $result['nullEdit'] ) {
1983                         // We don't know if it was a null edit until now, so increment here
1984                         $wgUser->pingLimiter( 'linkpurge' );
1985                 }
1986                 $result['redirect'] = $content->isRedirect();
1987                 $this->updateWatchlist();
1988                 wfProfileOut( __METHOD__ );
1989                 return $status;
1990         }
1991
1992         /**
1993          * Register the change of watch status
1994          */
1995         protected function updateWatchlist() {
1996                 global $wgUser;
1997
1998                 if ( $wgUser->isLoggedIn()
1999                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
2000                 ) {
2001                         $fname = __METHOD__;
2002                         $title = $this->mTitle;
2003                         $watch = $this->watchthis;
2004
2005                         // Do this in its own transaction to reduce contention...
2006                         $dbw = wfGetDB( DB_MASTER );
2007                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
2008                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
2009                         } );
2010                 }
2011         }
2012
2013         /**
2014          * Attempts to do 3-way merge of edit content with a base revision
2015          * and current content, in case of edit conflict, in whichever way appropriate
2016          * for the content type.
2017          *
2018          * @since 1.21
2019          *
2020          * @param Content $editContent
2021          *
2022          * @return bool
2023          */
2024         private function mergeChangesIntoContent( &$editContent ) {
2025                 wfProfileIn( __METHOD__ );
2026
2027                 $db = wfGetDB( DB_MASTER );
2028
2029                 // This is the revision the editor started from
2030                 $baseRevision = $this->getBaseRevision();
2031                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2032
2033                 if ( is_null( $baseContent ) ) {
2034                         wfProfileOut( __METHOD__ );
2035                         return false;
2036                 }
2037
2038                 // The current state, we want to merge updates into it
2039                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2040                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2041
2042                 if ( is_null( $currentContent ) ) {
2043                         wfProfileOut( __METHOD__ );
2044                         return false;
2045                 }
2046
2047                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2048
2049                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2050
2051                 if ( $result ) {
2052                         $editContent = $result;
2053                         wfProfileOut( __METHOD__ );
2054                         return true;
2055                 }
2056
2057                 wfProfileOut( __METHOD__ );
2058                 return false;
2059         }
2060
2061         /**
2062          * @return Revision
2063          */
2064         function getBaseRevision() {
2065                 if ( !$this->mBaseRevision ) {
2066                         $db = wfGetDB( DB_MASTER );
2067                         $this->mBaseRevision = Revision::loadFromTimestamp(
2068                                 $db, $this->mTitle, $this->edittime );
2069                 }
2070                 return $this->mBaseRevision;
2071         }
2072
2073         /**
2074          * Check given input text against $wgSpamRegex, and return the text of the first match.
2075          *
2076          * @param string $text
2077          *
2078          * @return string|bool Matching string or false
2079          */
2080         public static function matchSpamRegex( $text ) {
2081                 global $wgSpamRegex;
2082                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2083                 $regexes = (array)$wgSpamRegex;
2084                 return self::matchSpamRegexInternal( $text, $regexes );
2085         }
2086
2087         /**
2088          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2089          *
2090          * @param string $text
2091          *
2092          * @return string|bool Matching string or false
2093          */
2094         public static function matchSummarySpamRegex( $text ) {
2095                 global $wgSummarySpamRegex;
2096                 $regexes = (array)$wgSummarySpamRegex;
2097                 return self::matchSpamRegexInternal( $text, $regexes );
2098         }
2099
2100         /**
2101          * @param string $text
2102          * @param array $regexes
2103          * @return bool|string
2104          */
2105         protected static function matchSpamRegexInternal( $text, $regexes ) {
2106                 foreach ( $regexes as $regex ) {
2107                         $matches = array();
2108                         if ( preg_match( $regex, $text, $matches ) ) {
2109                                 return $matches[0];
2110                         }
2111                 }
2112                 return false;
2113         }
2114
2115         function setHeaders() {
2116                 global $wgOut, $wgUser, $wgAjaxEditStash;
2117
2118                 $wgOut->addModules( 'mediawiki.action.edit' );
2119                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2120
2121                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2122                         // The addition of default buttons is handled by getEditToolbar() which
2123                         // has its own dependency on this module. The call here ensures the module
2124                         // is loaded in time (it has position "top") for other modules to register
2125                         // buttons (e.g. extensions, gadgets, user scripts).
2126                         $wgOut->addModules( 'mediawiki.toolbar' );
2127                 }
2128
2129                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2130                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2131                 }
2132
2133                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2134                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2135                 }
2136
2137                 if ( $wgAjaxEditStash ) {
2138                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2139                 }
2140
2141                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2142
2143                 # Enabled article-related sidebar, toplinks, etc.
2144                 $wgOut->setArticleRelated( true );
2145
2146                 $contextTitle = $this->getContextTitle();
2147                 if ( $this->isConflict ) {
2148                         $msg = 'editconflict';
2149                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2150                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2151                 } else {
2152                         $msg = $contextTitle->exists()
2153                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2154                                         && $contextTitle->getDefaultMessageText() !== false
2155                                 )
2156                                 ? 'editing'
2157                                 : 'creating';
2158                 }
2159
2160                 # Use the title defined by DISPLAYTITLE magic word when present
2161                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2162                 if ( $displayTitle === false ) {
2163                         $displayTitle = $contextTitle->getPrefixedText();
2164                 }
2165                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2166         }
2167
2168         /**
2169          * Show all applicable editing introductions
2170          */
2171         protected function showIntro() {
2172                 global $wgOut, $wgUser;
2173                 if ( $this->suppressIntro ) {
2174                         return;
2175                 }
2176
2177                 $namespace = $this->mTitle->getNamespace();
2178
2179                 if ( $namespace == NS_MEDIAWIKI ) {
2180                         # Show a warning if editing an interface message
2181                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2182                         # If this is a default message (but not css or js),
2183                         # show a hint that it is translatable on translatewiki.net
2184                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2185                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2186                         ) {
2187                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2188                                 if ( $defaultMessageText !== false ) {
2189                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2190                                                 'translateinterface' );
2191                                 }
2192                         }
2193                 } elseif ( $namespace == NS_FILE ) {
2194                         # Show a hint to shared repo
2195                         $file = wfFindFile( $this->mTitle );
2196                         if ( $file && !$file->isLocal() ) {
2197                                 $descUrl = $file->getDescriptionUrl();
2198                                 # there must be a description url to show a hint to shared repo
2199                                 if ( $descUrl ) {
2200                                         if ( !$this->mTitle->exists() ) {
2201                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2202                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2203                                                 ) );
2204                                         } else {
2205                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2206                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2207                                                 ) );
2208                                         }
2209                                 }
2210                         }
2211                 }
2212
2213                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2214                 # Show log extract when the user is currently blocked
2215                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2216                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2217                         $username = $parts[0];
2218                         $user = User::newFromName( $username, false /* allow IP users*/ );
2219                         $ip = User::isIP( $username );
2220                         $block = Block::newFromTarget( $user, $user );
2221                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2222                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2223                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2224                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2225                                 # Show log extract if the user is currently blocked
2226                                 LogEventsList::showLogExtract(
2227                                         $wgOut,
2228                                         'block',
2229                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2230                                         '',
2231                                         array(
2232                                                 'lim' => 1,
2233                                                 'showIfEmpty' => false,
2234                                                 'msgKey' => array(
2235                                                         'blocked-notice-logextract',
2236                                                         $user->getName() # Support GENDER in notice
2237                                                 )
2238                                         )
2239                                 );
2240                         }
2241                 }
2242                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2243                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2244                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2245                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2246                         ) );
2247                         if ( $wgUser->isLoggedIn() ) {
2248                                 $wgOut->wrapWikiMsg(
2249                                         // Suppress the external link icon, consider the help url an internal one
2250                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2251                                         array(
2252                                                 'newarticletext',
2253                                                 $helpLink
2254                                         )
2255                                 );
2256                         } else {
2257                                 $wgOut->wrapWikiMsg(
2258                                         // Suppress the external link icon, consider the help url an internal one
2259                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2260                                         array(
2261                                                 'newarticletextanon',
2262                                                 $helpLink
2263                                         )
2264                                 );
2265                         }
2266                 }
2267                 # Give a notice if the user is editing a deleted/moved page...
2268                 if ( !$this->mTitle->exists() ) {
2269                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2270                                 '',
2271                                 array(
2272                                         'lim' => 10,
2273                                         'conds' => array( "log_action != 'revision'" ),
2274                                         'showIfEmpty' => false,
2275                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2276                                 )
2277                         );
2278                 }
2279         }
2280
2281         /**
2282          * Attempt to show a custom editing introduction, if supplied
2283          *
2284          * @return bool
2285          */
2286         protected function showCustomIntro() {
2287                 if ( $this->editintro ) {
2288                         $title = Title::newFromText( $this->editintro );
2289                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2290                                 global $wgOut;
2291                                 // Added using template syntax, to take <noinclude>'s into account.
2292                                 $wgOut->addWikiTextTitleTidy(
2293                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2294                                         $this->mTitle
2295                                 );
2296                                 return true;
2297                         }
2298                 }
2299                 return false;
2300         }
2301
2302         /**
2303          * Gets an editable textual representation of $content.
2304          * The textual representation can be turned by into a Content object by the
2305          * toEditContent() method.
2306          *
2307          * If $content is null or false or a string, $content is returned unchanged.
2308          *
2309          * If the given Content object is not of a type that can be edited using
2310          * the text base EditPage, an exception will be raised. Set
2311          * $this->allowNonTextContent to true to allow editing of non-textual
2312          * content.
2313          *
2314          * @param Content|null|bool|string $content
2315          * @return string The editable text form of the content.
2316          *
2317          * @throws MWException If $content is not an instance of TextContent and
2318          *   $this->allowNonTextContent is not true.
2319          */
2320         protected function toEditText( $content ) {
2321                 if ( $content === null || $content === false || is_string( $content ) ) {
2322                         return $content;
2323                 }
2324
2325                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2326                         throw new MWException( 'This content model is not supported: '
2327                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2328                 }
2329
2330                 return $content->serialize( $this->contentFormat );
2331         }
2332
2333         /**
2334          * Turns the given text into a Content object by unserializing it.
2335          *
2336          * If the resulting Content object is not of a type that can be edited using
2337          * the text base EditPage, an exception will be raised. Set
2338          * $this->allowNonTextContent to true to allow editing of non-textual
2339          * content.
2340          *
2341          * @param string|null|bool $text Text to unserialize
2342          * @return Content The content object created from $text. If $text was false
2343          *   or null, false resp. null will be  returned instead.
2344          *
2345          * @throws MWException If unserializing the text results in a Content
2346          *   object that is not an instance of TextContent and
2347          *   $this->allowNonTextContent is not true.
2348          */
2349         protected function toEditContent( $text ) {
2350                 if ( $text === false || $text === null ) {
2351                         return $text;
2352                 }
2353
2354                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2355                         $this->contentModel, $this->contentFormat );
2356
2357                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2358                         throw new MWException( 'This content model is not supported: '
2359                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2360                 }
2361
2362                 return $content;
2363         }
2364
2365         /**
2366          * Send the edit form and related headers to $wgOut
2367          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2368          *     during form output near the top, for captchas and the like.
2369          *
2370          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2371          * use the EditPage::showEditForm:fields hook instead.
2372          */
2373         function showEditForm( $formCallback = null ) {
2374                 global $wgOut, $wgUser;
2375
2376                 wfProfileIn( __METHOD__ );
2377
2378                 # need to parse the preview early so that we know which templates are used,
2379                 # otherwise users with "show preview after edit box" will get a blank list
2380                 # we parse this near the beginning so that setHeaders can do the title
2381                 # setting work instead of leaving it in getPreviewText
2382                 $previewOutput = '';
2383                 if ( $this->formtype == 'preview' ) {
2384                         $previewOutput = $this->getPreviewText();
2385                 }
2386
2387                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2388
2389                 $this->setHeaders();
2390
2391                 if ( $this->showHeader() === false ) {
2392                         wfProfileOut( __METHOD__ );
2393                         return;
2394                 }
2395
2396                 $wgOut->addHTML( $this->editFormPageTop );
2397
2398                 if ( $wgUser->getOption( 'previewontop' ) ) {
2399                         $this->displayPreviewArea( $previewOutput, true );
2400                 }
2401
2402                 $wgOut->addHTML( $this->editFormTextTop );
2403
2404                 $showToolbar = true;
2405                 if ( $this->wasDeletedSinceLastEdit() ) {
2406                         if ( $this->formtype == 'save' ) {
2407                                 // Hide the toolbar and edit area, user can click preview to get it back
2408                                 // Add an confirmation checkbox and explanation.
2409                                 $showToolbar = false;
2410                         } else {
2411                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2412                                         'deletedwhileediting' );
2413                         }
2414                 }
2415
2416                 // @todo add EditForm plugin interface and use it here!
2417                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2418                 $wgOut->addHTML( Html::openElement(
2419                         'form',
2420                         array(
2421                                 'id' => self::EDITFORM_ID,
2422                                 'name' => self::EDITFORM_ID,
2423                                 'method' => 'post',
2424                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2425                                 'enctype' => 'multipart/form-data'
2426                         )
2427                 ) );
2428
2429                 if ( is_callable( $formCallback ) ) {
2430                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2431                         call_user_func_array( $formCallback, array( &$wgOut ) );
2432                 }
2433
2434                 // Add an empty field to trip up spambots
2435                 $wgOut->addHTML(
2436                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2437                         . Html::rawElement(
2438                                 'label',
2439                                 array( 'for' => 'wpAntiSpam' ),
2440                                 wfMessage( 'simpleantispam-label' )->parse()
2441                         )
2442                         . Xml::element(
2443                                 'input',
2444                                 array(
2445                                         'type' => 'text',
2446                                         'name' => 'wpAntispam',
2447                                         'id' => 'wpAntispam',
2448                                         'value' => ''
2449                                 )
2450                         )
2451                         . Xml::closeElement( 'div' )
2452                 );
2453
2454                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2455
2456                 // Put these up at the top to ensure they aren't lost on early form submission
2457                 $this->showFormBeforeText();
2458
2459                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2460                         $username = $this->lastDelete->user_name;
2461                         $comment = $this->lastDelete->log_comment;
2462
2463                         // It is better to not parse the comment at all than to have templates expanded in the middle
2464                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2465                         $key = $comment === ''
2466                                 ? 'confirmrecreate-noreason'
2467                                 : 'confirmrecreate';
2468                         $wgOut->addHTML(
2469                                 '<div class="mw-confirm-recreate">' .
2470                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2471                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2472                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2473                                 ) .
2474                                 '</div>'
2475                         );
2476                 }
2477
2478                 # When the summary is hidden, also hide them on preview/show changes
2479                 if ( $this->nosummary ) {
2480                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2481                 }
2482
2483                 # If a blank edit summary was previously provided, and the appropriate
2484                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2485                 # user being bounced back more than once in the event that a summary
2486                 # is not required.
2487                 #####
2488                 # For a bit more sophisticated detection of blank summaries, hash the
2489                 # automatic one and pass that in the hidden field wpAutoSummary.
2490                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2491                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2492                 }
2493
2494                 if ( $this->undidRev ) {
2495                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2496                 }
2497
2498                 if ( $this->selfRedirect ) {
2499                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2500                 }
2501
2502                 if ( $this->hasPresetSummary ) {
2503                         // If a summary has been preset using &summary= we don't want to prompt for
2504                         // a different summary. Only prompt for a summary if the summary is blanked.
2505                         // (Bug 17416)
2506                         $this->autoSumm = md5( '' );
2507                 }
2508
2509                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2510                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2511
2512                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2513                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2514                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2515
2516                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2517                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2518
2519                 if ( $this->section == 'new' ) {
2520                         $this->showSummaryInput( true, $this->summary );
2521                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2522                 }
2523
2524                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2525
2526                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2527                         $wgOut->addHTML( EditPage::getEditToolbar() );
2528                 }
2529
2530                 if ( $this->blankArticle ) {
2531                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2532                 }
2533
2534                 if ( $this->isConflict ) {
2535                         // In an edit conflict bypass the overridable content form method
2536                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2537                         // resolved between page source edits and custom ui edits using the
2538                         // custom edit ui.
2539                         $this->textbox2 = $this->textbox1;
2540
2541                         $content = $this->getCurrentContent();
2542                         $this->textbox1 = $this->toEditText( $content );
2543
2544                         $this->showTextbox1();
2545                 } else {
2546                         $this->showContentForm();
2547                 }
2548
2549                 $wgOut->addHTML( $this->editFormTextAfterContent );
2550
2551                 $this->showStandardInputs();
2552
2553                 $this->showFormAfterText();
2554
2555                 $this->showTosSummary();
2556
2557                 $this->showEditTools();
2558
2559                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2560
2561                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2562                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2563
2564                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2565                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2566
2567                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2568                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2569
2570                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2571
2572                 if ( $this->isConflict ) {
2573                         try {
2574                                 $this->showConflict();
2575                         } catch ( MWContentSerializationException $ex ) {
2576                                 // this can't really happen, but be nice if it does.
2577                                 $msg = wfMessage(
2578                                         'content-failed-to-parse',
2579                                         $this->contentModel,
2580                                         $this->contentFormat,
2581                                         $ex->getMessage()
2582                                 );
2583                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2584                         }
2585                 }
2586
2587                 // Marker for detecting truncated form data.  This must be the last
2588                 // parameter sent in order to be of use, so do not move me.
2589                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2590                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2591
2592                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2593                         $this->displayPreviewArea( $previewOutput, false );
2594                 }
2595
2596                 wfProfileOut( __METHOD__ );
2597         }
2598
2599         /**
2600          * Extract the section title from current section text, if any.
2601          *
2602          * @param string $text
2603          * @return string|bool String or false
2604          */
2605         public static function extractSectionTitle( $text ) {
2606                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2607                 if ( !empty( $matches[2] ) ) {
2608                         global $wgParser;
2609                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2610                 } else {
2611                         return false;
2612                 }
2613         }
2614
2615         /**
2616          * @return bool
2617          */
2618         protected function showHeader() {
2619                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2620                 global $wgAllowUserCss, $wgAllowUserJs;
2621
2622                 if ( $this->mTitle->isTalkPage() ) {
2623                         $wgOut->addWikiMsg( 'talkpagetext' );
2624                 }
2625
2626                 // Add edit notices
2627                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2628
2629                 if ( $this->isConflict ) {
2630                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2631                         $this->edittime = $this->mArticle->getTimestamp();
2632                 } else {
2633                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2634                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2635                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2636                                 // Someone is welcome to try refactoring though
2637                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2638                                 return false;
2639                         }
2640
2641                         if ( $this->section != '' && $this->section != 'new' ) {
2642                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2643                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2644                                         if ( $sectionTitle !== false ) {
2645                                                 $this->summary = "/* $sectionTitle */ ";
2646                                         }
2647                                 }
2648                         }
2649
2650                         if ( $this->missingComment ) {
2651                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2652                         }
2653
2654                         if ( $this->missingSummary && $this->section != 'new' ) {
2655                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2656                         }
2657
2658                         if ( $this->missingSummary && $this->section == 'new' ) {
2659                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2660                         }
2661
2662                         if ( $this->blankArticle ) {
2663                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2664                         }
2665
2666                         if ( $this->selfRedirect ) {
2667                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2668                         }
2669
2670                         if ( $this->hookError !== '' ) {
2671                                 $wgOut->addWikiText( $this->hookError );
2672                         }
2673
2674                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2675                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2676                         }
2677
2678                         if ( $this->section != 'new' ) {
2679                                 $revision = $this->mArticle->getRevisionFetched();
2680                                 if ( $revision ) {
2681                                         // Let sysop know that this will make private content public if saved
2682
2683                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2684                                                 $wgOut->wrapWikiMsg(
2685                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2686                                                         'rev-deleted-text-permission'
2687                                                 );
2688                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2689                                                 $wgOut->wrapWikiMsg(
2690                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2691                                                         'rev-deleted-text-view'
2692                                                 );
2693                                         }
2694
2695                                         if ( !$revision->isCurrent() ) {
2696                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2697                                                 $wgOut->addWikiMsg( 'editingold' );
2698                                         }
2699                                 } elseif ( $this->mTitle->exists() ) {
2700                                         // Something went wrong
2701
2702                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2703                                                 array( 'missing-revision', $this->oldid ) );
2704                                 }
2705                         }
2706                 }
2707
2708                 if ( wfReadOnly() ) {
2709                         $wgOut->wrapWikiMsg(
2710                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2711                                 array( 'readonlywarning', wfReadOnlyReason() )
2712                         );
2713                 } elseif ( $wgUser->isAnon() ) {
2714                         if ( $this->formtype != 'preview' ) {
2715                                 $wgOut->wrapWikiMsg(
2716                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2717                                         array( 'anoneditwarning',
2718                                                 // Log-in link
2719                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2720                                                 // Sign-up link
2721                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2722                                 );
2723                         } else {
2724                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2725                                         'anonpreviewwarning'
2726                                 );
2727                         }
2728                 } else {
2729                         if ( $this->isCssJsSubpage ) {
2730                                 # Check the skin exists
2731                                 if ( $this->isWrongCaseCssJsPage ) {
2732                                         $wgOut->wrapWikiMsg(
2733                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2734                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2735                                         );
2736                                 }
2737                                 if ( $this->formtype !== 'preview' ) {
2738                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2739                                                 $wgOut->wrapWikiMsg(
2740                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2741                                                         array( 'usercssyoucanpreview' )
2742                                                 );
2743                                         }
2744
2745                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2746                                                 $wgOut->wrapWikiMsg(
2747                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2748                                                         array( 'userjsyoucanpreview' )
2749                                                 );
2750                                         }
2751                                 }
2752                         }
2753                 }
2754
2755                 if ( $this->mTitle->isProtected( 'edit' ) &&
2756                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2757                 ) {
2758                         # Is the title semi-protected?
2759                         if ( $this->mTitle->isSemiProtected() ) {
2760                                 $noticeMsg = 'semiprotectedpagewarning';
2761                         } else {
2762                                 # Then it must be protected based on static groups (regular)
2763                                 $noticeMsg = 'protectedpagewarning';
2764                         }
2765                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2766                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2767                 }
2768                 if ( $this->mTitle->isCascadeProtected() ) {
2769                         # Is this page under cascading protection from some source pages?
2770                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2771                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2772                         $cascadeSourcesCount = count( $cascadeSources );
2773                         if ( $cascadeSourcesCount > 0 ) {
2774                                 # Explain, and list the titles responsible
2775                                 foreach ( $cascadeSources as $page ) {
2776                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2777                                 }
2778                         }
2779                         $notice .= '</div>';
2780                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2781                 }
2782                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2783                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2784                                 array( 'lim' => 1,
2785                                         'showIfEmpty' => false,
2786                                         'msgKey' => array( 'titleprotectedwarning' ),
2787                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2788                 }
2789
2790                 if ( $this->kblength === false ) {
2791                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2792                 }
2793
2794                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2795                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2796                                 array(
2797                                         'longpageerror',
2798                                         $wgLang->formatNum( $this->kblength ),
2799                                         $wgLang->formatNum( $wgMaxArticleSize )
2800                                 )
2801                         );
2802                 } else {
2803                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2804                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2805                                         array(
2806                                                 'longpage-hint',
2807                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2808                                                 strlen( $this->textbox1 )
2809                                         )
2810                                 );
2811                         }
2812                 }
2813                 # Add header copyright warning
2814                 $this->showHeaderCopyrightWarning();
2815
2816                 return true;
2817         }
2818
2819         /**
2820          * Standard summary input and label (wgSummary), abstracted so EditPage
2821          * subclasses may reorganize the form.
2822          * Note that you do not need to worry about the label's for=, it will be
2823          * inferred by the id given to the input. You can remove them both by
2824          * passing array( 'id' => false ) to $userInputAttrs.
2825          *
2826          * @param string $summary The value of the summary input
2827          * @param string $labelText The html to place inside the label
2828          * @param array $inputAttrs Array of attrs to use on the input
2829          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2830          *
2831          * @return array An array in the format array( $label, $input )
2832          */
2833         function getSummaryInput( $summary = "", $labelText = null,
2834                 $inputAttrs = null, $spanLabelAttrs = null
2835         ) {
2836                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2837                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2838                         'id' => 'wpSummary',
2839                         'maxlength' => '200',
2840                         'tabindex' => '1',
2841                         'size' => 60,
2842                         'spellcheck' => 'true',
2843                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2844
2845                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2846                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2847                         'id' => "wpSummaryLabel"
2848                 );
2849
2850                 $label = null;
2851                 if ( $labelText ) {
2852                         $label = Xml::tags(
2853                                 'label',
2854                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2855                                 $labelText
2856                         );
2857                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2858                 }
2859
2860                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2861
2862                 return array( $label, $input );
2863         }
2864
2865         /**
2866          * @param bool $isSubjectPreview True if this is the section subject/title
2867          *   up top, or false if this is the comment summary
2868          *   down below the textarea
2869          * @param string $summary The text of the summary to display
2870          */
2871         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2872                 global $wgOut, $wgContLang;
2873                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2874                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2875                 if ( $isSubjectPreview ) {
2876                         if ( $this->nosummary ) {
2877                                 return;
2878                         }
2879                 } else {
2880                         if ( !$this->mShowSummaryField ) {
2881                                 return;
2882                         }
2883                 }
2884                 $summary = $wgContLang->recodeForEdit( $summary );
2885                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2886                 list( $label, $input ) = $this->getSummaryInput(
2887                         $summary,
2888                         $labelText,
2889                         array( 'class' => $summaryClass ),
2890                         array()
2891                 );
2892                 $wgOut->addHTML( "{$label} {$input}" );
2893         }
2894
2895         /**
2896          * @param bool $isSubjectPreview True if this is the section subject/title
2897          *   up top, or false if this is the comment summary
2898          *   down below the textarea
2899          * @param string $summary The text of the summary to display
2900          * @return string
2901          */
2902         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2903                 // avoid spaces in preview, gets always trimmed on save
2904                 $summary = trim( $summary );
2905                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2906                         return "";
2907                 }
2908
2909                 global $wgParser;
2910
2911                 if ( $isSubjectPreview ) {
2912                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2913                                 ->inContentLanguage()->text();
2914                 }
2915
2916                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2917
2918                 $summary = wfMessage( $message )->parse()
2919                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2920                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2921         }
2922
2923         protected function showFormBeforeText() {
2924                 global $wgOut;
2925                 $section = htmlspecialchars( $this->section );
2926                 $wgOut->addHTML( <<<HTML
2927 <input type='hidden' value="{$section}" name="wpSection"/>
2928 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2929 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2930 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2931
2932 HTML
2933                 );
2934                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2935                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2936                 }
2937         }
2938
2939         protected function showFormAfterText() {
2940                 global $wgOut, $wgUser;
2941                 /**
2942                  * To make it harder for someone to slip a user a page
2943                  * which submits an edit form to the wiki without their
2944                  * knowledge, a random token is associated with the login
2945                  * session. If it's not passed back with the submission,
2946                  * we won't save the page, or render user JavaScript and
2947                  * CSS previews.
2948                  *
2949                  * For anon editors, who may not have a session, we just
2950                  * include the constant suffix to prevent editing from
2951                  * broken text-mangling proxies.
2952                  */
2953                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2954         }
2955
2956         /**
2957          * Subpage overridable method for printing the form for page content editing
2958          * By default this simply outputs wpTextbox1
2959          * Subclasses can override this to provide a custom UI for editing;
2960          * be it a form, or simply wpTextbox1 with a modified content that will be
2961          * reverse modified when extracted from the post data.
2962          * Note that this is basically the inverse for importContentFormData
2963          */
2964         protected function showContentForm() {
2965                 $this->showTextbox1();
2966         }
2967
2968         /**
2969          * Method to output wpTextbox1
2970          * The $textoverride method can be used by subclasses overriding showContentForm
2971          * to pass back to this method.
2972          *
2973          * @param array $customAttribs Array of html attributes to use in the textarea
2974          * @param string $textoverride Optional text to override $this->textarea1 with
2975          */
2976         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2977                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2978                         $attribs = array( 'style' => 'display:none;' );
2979                 } else {
2980                         $classes = array(); // Textarea CSS
2981                         if ( $this->mTitle->isProtected( 'edit' ) &&
2982                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2983                         ) {
2984                                 # Is the title semi-protected?
2985                                 if ( $this->mTitle->isSemiProtected() ) {
2986                                         $classes[] = 'mw-textarea-sprotected';
2987                                 } else {
2988                                         # Then it must be protected based on static groups (regular)
2989                                         $classes[] = 'mw-textarea-protected';
2990                                 }
2991                                 # Is the title cascade-protected?
2992                                 if ( $this->mTitle->isCascadeProtected() ) {
2993                                         $classes[] = 'mw-textarea-cprotected';
2994                                 }
2995                         }
2996
2997                         $attribs = array( 'tabindex' => 1 );
2998
2999                         if ( is_array( $customAttribs ) ) {
3000                                 $attribs += $customAttribs;
3001                         }
3002
3003                         if ( count( $classes ) ) {
3004                                 if ( isset( $attribs['class'] ) ) {
3005                                         $classes[] = $attribs['class'];
3006                                 }
3007                                 $attribs['class'] = implode( ' ', $classes );
3008                         }
3009                 }
3010
3011                 $this->showTextbox(
3012                         $textoverride !== null ? $textoverride : $this->textbox1,
3013                         'wpTextbox1',
3014                         $attribs
3015                 );
3016         }
3017
3018         protected function showTextbox2() {
3019                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
3020         }
3021
3022         protected function showTextbox( $text, $name, $customAttribs = array() ) {
3023                 global $wgOut, $wgUser;
3024
3025                 $wikitext = $this->safeUnicodeOutput( $text );
3026                 if ( strval( $wikitext ) !== '' ) {
3027                         // Ensure there's a newline at the end, otherwise adding lines
3028                         // is awkward.
3029                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3030                         // mode will show an extra newline. A bit annoying.
3031                         $wikitext .= "\n";
3032                 }
3033
3034                 $attribs = $customAttribs + array(
3035                         'accesskey' => ',',
3036                         'id' => $name,
3037                         'cols' => $wgUser->getIntOption( 'cols' ),
3038                         'rows' => $wgUser->getIntOption( 'rows' ),
3039                         // Avoid PHP notices when appending preferences
3040                         // (appending allows customAttribs['style'] to still work).
3041                         'style' => ''
3042                 );
3043
3044                 $pageLang = $this->mTitle->getPageLanguage();
3045                 $attribs['lang'] = $pageLang->getHtmlCode();
3046                 $attribs['dir'] = $pageLang->getDir();
3047
3048                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3049         }
3050
3051         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3052                 global $wgOut;
3053                 $classes = array();
3054                 if ( $isOnTop ) {
3055                         $classes[] = 'ontop';
3056                 }
3057
3058                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3059
3060                 if ( $this->formtype != 'preview' ) {
3061                         $attribs['style'] = 'display: none;';
3062                 }
3063
3064                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3065
3066                 if ( $this->formtype == 'preview' ) {
3067                         $this->showPreview( $previewOutput );
3068                 }
3069
3070                 $wgOut->addHTML( '</div>' );
3071
3072                 if ( $this->formtype == 'diff' ) {
3073                         try {
3074                                 $this->showDiff();
3075                         } catch ( MWContentSerializationException $ex ) {
3076                                 $msg = wfMessage(
3077                                         'content-failed-to-parse',
3078                                         $this->contentModel,
3079                                         $this->contentFormat,
3080                                         $ex->getMessage()
3081                                 );
3082                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3083                         }
3084                 }
3085         }
3086
3087         /**
3088          * Append preview output to $wgOut.
3089          * Includes category rendering if this is a category page.
3090          *
3091          * @param string $text The HTML to be output for the preview.
3092          */
3093         protected function showPreview( $text ) {
3094                 global $wgOut;
3095                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3096                         $this->mArticle->openShowCategory();
3097                 }
3098                 # This hook seems slightly odd here, but makes things more
3099                 # consistent for extensions.
3100                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3101                 $wgOut->addHTML( $text );
3102                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3103                         $this->mArticle->closeShowCategory();
3104                 }
3105         }
3106
3107         /**
3108          * Get a diff between the current contents of the edit box and the
3109          * version of the page we're editing from.
3110          *
3111          * If this is a section edit, we'll replace the section as for final
3112          * save and then make a comparison.
3113          */
3114         function showDiff() {
3115                 global $wgUser, $wgContLang, $wgOut;
3116
3117                 $oldtitlemsg = 'currentrev';
3118                 # if message does not exist, show diff against the preloaded default
3119                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3120                         $oldtext = $this->mTitle->getDefaultMessageText();
3121                         if ( $oldtext !== false ) {
3122                                 $oldtitlemsg = 'defaultmessagetext';
3123                                 $oldContent = $this->toEditContent( $oldtext );
3124                         } else {
3125                                 $oldContent = null;
3126                         }
3127                 } else {
3128                         $oldContent = $this->getCurrentContent();
3129                 }
3130
3131                 $textboxContent = $this->toEditContent( $this->textbox1 );
3132
3133                 $newContent = $this->mArticle->replaceSectionContent(
3134                                                         $this->section, $textboxContent,
3135                                                         $this->summary, $this->edittime );
3136
3137                 if ( $newContent ) {
3138                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3139                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3140
3141                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3142                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3143                 }
3144
3145                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3146                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3147                         $newtitle = wfMessage( 'yourtext' )->parse();
3148
3149                         if ( !$oldContent ) {
3150                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3151                         }
3152
3153                         if ( !$newContent ) {
3154                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3155                         }
3156
3157                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3158                         $de->setContent( $oldContent, $newContent );
3159
3160                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3161                         $de->showDiffStyle();
3162                 } else {
3163                         $difftext = '';
3164                 }
3165
3166                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3167         }
3168
3169         /**
3170          * Show the header copyright warning.
3171          */
3172         protected function showHeaderCopyrightWarning() {
3173                 $msg = 'editpage-head-copy-warn';
3174                 if ( !wfMessage( $msg )->isDisabled() ) {
3175                         global $wgOut;
3176                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3177                                 'editpage-head-copy-warn' );
3178                 }
3179         }
3180
3181         /**
3182          * Give a chance for site and per-namespace customizations of
3183          * terms of service summary link that might exist separately
3184          * from the copyright notice.
3185          *
3186          * This will display between the save button and the edit tools,
3187          * so should remain short!
3188          */
3189         protected function showTosSummary() {
3190                 $msg = 'editpage-tos-summary';
3191                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3192                 if ( !wfMessage( $msg )->isDisabled() ) {
3193                         global $wgOut;
3194                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3195                         $wgOut->addWikiMsg( $msg );
3196                         $wgOut->addHTML( '</div>' );
3197                 }
3198         }
3199
3200         protected function showEditTools() {
3201                 global $wgOut;
3202                 $wgOut->addHTML( '<div class="mw-editTools">' .
3203                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3204                         '</div>' );
3205         }
3206
3207         /**
3208          * Get the copyright warning
3209          *
3210          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3211          * @return string
3212          */
3213         protected function getCopywarn() {
3214                 return self::getCopyrightWarning( $this->mTitle );
3215         }
3216
3217         /**
3218          * Get the copyright warning, by default returns wikitext
3219          *
3220          * @param Title $title
3221          * @param string $format Output format, valid values are any function of a Message object
3222          * @return string
3223          */
3224         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3225                 global $wgRightsText;
3226                 if ( $wgRightsText ) {
3227                         $copywarnMsg = array( 'copyrightwarning',
3228                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3229                                 $wgRightsText );
3230                 } else {
3231                         $copywarnMsg = array( 'copyrightwarning2',
3232                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3233                 }
3234                 // Allow for site and per-namespace customization of contribution/copyright notice.
3235                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3236
3237                 return "<div id=\"editpage-copywarn\">\n" .
3238                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3239         }
3240
3241         /**
3242          * Get the Limit report for page previews
3243          *
3244          * @since 1.22
3245          * @param ParserOutput $output ParserOutput object from the parse
3246          * @return string HTML
3247          */
3248         public static function getPreviewLimitReport( $output ) {
3249                 if ( !$output || !$output->getLimitReportData() ) {
3250                         return '';
3251                 }
3252
3253                 wfProfileIn( __METHOD__ );
3254
3255                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3256                         wfMessage( 'limitreport-title' )->parseAsBlock()
3257                 );
3258
3259                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3260                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3261
3262                 $limitReport .= Html::openElement( 'table', array(
3263                         'class' => 'preview-limit-report wikitable'
3264                 ) ) .
3265                         Html::openElement( 'tbody' );
3266
3267                 foreach ( $output->getLimitReportData() as $key => $value ) {
3268                         if ( Hooks::run( 'ParserLimitReportFormat',
3269                                 array( $key, &$value, &$limitReport, true, true )
3270                         ) ) {
3271                                 $keyMsg = wfMessage( $key );
3272                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3273                                 if ( !$valueMsg->exists() ) {
3274                                         $valueMsg = new RawMessage( '$1' );
3275                                 }
3276                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3277                                         $limitReport .= Html::openElement( 'tr' ) .
3278                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3279                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3280                                                 Html::closeElement( 'tr' );
3281                                 }
3282                         }
3283                 }
3284
3285                 $limitReport .= Html::closeElement( 'tbody' ) .
3286                         Html::closeElement( 'table' ) .
3287                         Html::closeElement( 'div' );
3288
3289                 wfProfileOut( __METHOD__ );
3290
3291                 return $limitReport;
3292         }
3293
3294         protected function showStandardInputs( &$tabindex = 2 ) {
3295                 global $wgOut;
3296                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3297
3298                 if ( $this->section != 'new' ) {
3299                         $this->showSummaryInput( false, $this->summary );
3300                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3301                 }
3302
3303                 $checkboxes = $this->getCheckboxes( $tabindex,
3304                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3305                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3306
3307                 // Show copyright warning.
3308                 $wgOut->addWikiText( $this->getCopywarn() );
3309                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3310
3311                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3312                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3313
3314                 $cancel = $this->getCancelLink();
3315                 if ( $cancel !== '' ) {
3316                         $cancel .= Html::element( 'span',
3317                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3318                                 wfMessage( 'pipe-separator' )->text() );
3319                 }
3320
3321                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3322                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3323                 $attrs = array(
3324                         'target' => 'helpwindow',
3325                         'href' => $edithelpurl,
3326                 );
3327                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3328                         $attrs, array( 'mw-ui-quiet' ) ) .
3329                         wfMessage( 'word-separator' )->escaped() .
3330                         wfMessage( 'newwindow' )->parse();
3331
3332                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3333                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3334                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3335
3336                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3337
3338                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3339         }
3340
3341         /**
3342          * Show an edit conflict. textbox1 is already shown in showEditForm().
3343          * If you want to use another entry point to this function, be careful.
3344          */
3345         protected function showConflict() {
3346                 global $wgOut;
3347
3348                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3349                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3350
3351                         $content1 = $this->toEditContent( $this->textbox1 );
3352                         $content2 = $this->toEditContent( $this->textbox2 );
3353
3354                         $handler = ContentHandler::getForModelID( $this->contentModel );
3355                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3356                         $de->setContent( $content2, $content1 );
3357                         $de->showDiff(
3358                                 wfMessage( 'yourtext' )->parse(),
3359                                 wfMessage( 'storedversion' )->text()
3360                         );
3361
3362                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3363                         $this->showTextbox2();
3364                 }
3365         }
3366
3367         /**
3368          * @return string
3369          */
3370         public function getCancelLink() {
3371                 $cancelParams = array();
3372                 if ( !$this->isConflict && $this->oldid > 0 ) {
3373                         $cancelParams['oldid'] = $this->oldid;
3374                 }
3375                 $attrs = array( 'id' => 'mw-editform-cancel' );
3376
3377                 return Linker::linkKnown(
3378                         $this->getContextTitle(),
3379                         wfMessage( 'cancel' )->parse(),
3380                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3381                         $cancelParams
3382                 );
3383         }
3384
3385         /**
3386          * Returns the URL to use in the form's action attribute.
3387          * This is used by EditPage subclasses when simply customizing the action
3388          * variable in the constructor is not enough. This can be used when the
3389          * EditPage lives inside of a Special page rather than a custom page action.
3390          *
3391          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3392          * @return string
3393          */
3394         protected function getActionURL( Title $title ) {
3395                 return $title->getLocalURL( array( 'action' => $this->action ) );
3396         }
3397
3398         /**
3399          * Check if a page was deleted while the user was editing it, before submit.
3400          * Note that we rely on the logging table, which hasn't been always there,
3401          * but that doesn't matter, because this only applies to brand new
3402          * deletes.
3403          * @return bool
3404          */
3405         protected function wasDeletedSinceLastEdit() {
3406                 if ( $this->deletedSinceEdit !== null ) {
3407                         return $this->deletedSinceEdit;
3408                 }
3409
3410                 $this->deletedSinceEdit = false;
3411
3412                 if ( $this->mTitle->isDeletedQuick() ) {
3413                         $this->lastDelete = $this->getLastDelete();
3414                         if ( $this->lastDelete ) {
3415                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3416                                 if ( $deleteTime > $this->starttime ) {
3417                                         $this->deletedSinceEdit = true;
3418                                 }
3419                         }
3420                 }
3421
3422                 return $this->deletedSinceEdit;
3423         }
3424
3425         /**
3426          * @return bool|stdClass
3427          */
3428         protected function getLastDelete() {
3429                 $dbr = wfGetDB( DB_SLAVE );
3430                 $data = $dbr->selectRow(
3431                         array( 'logging', 'user' ),
3432                         array(
3433                                 'log_type',
3434                                 'log_action',
3435                                 'log_timestamp',
3436                                 'log_user',
3437                                 'log_namespace',
3438                                 'log_title',
3439                                 'log_comment',
3440                                 'log_params',
3441                                 'log_deleted',
3442                                 'user_name'
3443                         ), array(
3444                                 'log_namespace' => $this->mTitle->getNamespace(),
3445                                 'log_title' => $this->mTitle->getDBkey(),
3446                                 'log_type' => 'delete',
3447                                 'log_action' => 'delete',
3448                                 'user_id=log_user'
3449                         ),
3450                         __METHOD__,
3451                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3452                 );
3453                 // Quick paranoid permission checks...
3454                 if ( is_object( $data ) ) {
3455                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3456                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3457                         }
3458
3459                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3460                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3461                         }
3462                 }
3463
3464                 return $data;
3465         }
3466
3467         /**
3468          * Get the rendered text for previewing.
3469          * @throws MWException
3470          * @return string
3471          */
3472         function getPreviewText() {
3473                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3474                 global $wgAllowUserCss, $wgAllowUserJs;
3475
3476                 wfProfileIn( __METHOD__ );
3477
3478                 if ( $wgRawHtml && !$this->mTokenOk ) {
3479                         // Could be an offsite preview attempt. This is very unsafe if
3480                         // HTML is enabled, as it could be an attack.
3481                         $parsedNote = '';
3482                         if ( $this->textbox1 !== '' ) {
3483                                 // Do not put big scary notice, if previewing the empty
3484                                 // string, which happens when you initially edit
3485                                 // a category page, due to automatic preview-on-open.
3486                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3487                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3488                         }
3489                         wfProfileOut( __METHOD__ );
3490                         return $parsedNote;
3491                 }
3492
3493                 $note = '';
3494
3495                 try {
3496                         $content = $this->toEditContent( $this->textbox1 );
3497
3498                         $previewHTML = '';
3499                         if ( !Hooks::run(
3500                                 'AlternateEditPreview',
3501                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3502                         ) {
3503                                 wfProfileOut( __METHOD__ );
3504                                 return $previewHTML;
3505                         }
3506
3507                         # provide a anchor link to the editform
3508                         $continueEditing = '<span class="mw-continue-editing">' .
3509                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3510                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3511                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3512                                 if ( $this->mTokenOkExceptSuffix ) {
3513                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3514                                 } else {
3515                                         $note = wfMessage( 'session_fail_preview' )->plain();
3516                                 }
3517                         } elseif ( $this->incompleteForm ) {
3518                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3519                         } else {
3520                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3521                         }
3522
3523                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3524                         $parserOptions->setIsPreview( true );
3525                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3526
3527                         # don't parse non-wikitext pages, show message about preview
3528                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3529                                 if ( $this->mTitle->isCssJsSubpage() ) {
3530                                         $level = 'user';
3531                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3532                                         $level = 'site';
3533                                 } else {
3534                                         $level = false;
3535                                 }
3536
3537                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3538                                         $format = 'css';
3539                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3540                                                 $format = false;
3541                                         }
3542                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3543                                         $format = 'js';
3544                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3545                                                 $format = false;
3546                                         }
3547                                 } else {
3548                                         $format = false;
3549                                 }
3550
3551                                 # Used messages to make sure grep find them:
3552                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3553                                 if ( $level && $format ) {
3554                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3555                                                 wfMessage( "{$level}{$format}preview" )->text() .
3556                                                 ' ' . $continueEditing . "</div>";
3557                                 }
3558                         }
3559
3560                         # If we're adding a comment, we need to show the
3561                         # summary as the headline
3562                         if ( $this->section === "new" && $this->summary !== "" ) {
3563                                 $content = $content->addSectionHeader( $this->summary );
3564                         }
3565
3566                         $hook_args = array( $this, &$content );
3567                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3568                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3569
3570                         $parserOptions->enableLimitReport();
3571
3572                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3573                         # But it's now deprecated, so never mind
3574
3575                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3576                         $scopedCallback = $parserOptions->setupFakeRevision(
3577                                 $this->mTitle, $pstContent, $wgUser );
3578                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3579
3580                         # Try to stash the edit for the final submission step
3581                         # @todo: different date format preferences cause cache misses
3582                         ApiStashEdit::stashEditFromPreview(
3583                                 $this->getArticle(), $content, $pstContent,
3584                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3585                         );
3586
3587                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3588                         $previewHTML = $parserOutput->getText();
3589                         $this->mParserOutput = $parserOutput;
3590                         $wgOut->addParserOutputMetadata( $parserOutput );
3591
3592                         if ( count( $parserOutput->getWarnings() ) ) {
3593                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3594                         }
3595                 } catch ( MWContentSerializationException $ex ) {
3596                         $m = wfMessage(
3597                                 'content-failed-to-parse',
3598                                 $this->contentModel,
3599                                 $this->contentFormat,
3600                                 $ex->getMessage()
3601                         );
3602                         $note .= "\n\n" . $m->parse();
3603                         $previewHTML = '';
3604                 }
3605
3606                 if ( $this->isConflict ) {
3607                         $conflict = '<h2 id="mw-previewconflict">'
3608                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3609                 } else {
3610                         $conflict = '<hr />';
3611                 }
3612
3613                 $previewhead = "<div class='previewnote'>\n" .
3614                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3615                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3616
3617                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3618                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3619                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3620                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3621
3622                 wfProfileOut( __METHOD__ );
3623                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3624         }
3625
3626         /**
3627          * @return array
3628          */
3629         function getTemplates() {
3630                 if ( $this->preview || $this->section != '' ) {
3631                         $templates = array();
3632                         if ( !isset( $this->mParserOutput ) ) {
3633                                 return $templates;
3634                         }
3635                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3636                                 foreach ( array_keys( $template ) as $dbk ) {
3637                                         $templates[] = Title::makeTitle( $ns, $dbk );
3638                                 }
3639                         }
3640                         return $templates;
3641                 } else {
3642                         return $this->mTitle->getTemplateLinksFrom();
3643                 }
3644         }
3645
3646         /**
3647          * Shows a bulletin board style toolbar for common editing functions.
3648          * It can be disabled in the user preferences.
3649          *
3650          * @return string
3651          */
3652         static function getEditToolbar() {
3653                 global $wgContLang, $wgOut;
3654                 global $wgEnableUploads, $wgForeignFileRepos;
3655
3656                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3657
3658                 /**
3659                  * $toolarray is an array of arrays each of which includes the
3660                  * opening tag, the closing tag, optionally a sample text that is
3661                  * inserted between the two when no selection is highlighted
3662                  * and.  The tip text is shown when the user moves the mouse
3663                  * over the button.
3664                  *
3665                  * Images are defined in ResourceLoaderEditToolbarModule.
3666                  */
3667                 $toolarray = array(
3668                         array(
3669                                 'id'     => 'mw-editbutton-bold',
3670                                 'open'   => '\'\'\'',
3671                                 'close'  => '\'\'\'',
3672                                 'sample' => wfMessage( 'bold_sample' )->text(),
3673                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3674                         ),
3675                         array(
3676                                 'id'     => 'mw-editbutton-italic',
3677                                 'open'   => '\'\'',
3678                                 'close'  => '\'\'',
3679                                 'sample' => wfMessage( 'italic_sample' )->text(),
3680                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3681                         ),
3682                         array(
3683                                 'id'     => 'mw-editbutton-link',
3684                                 'open'   => '[[',
3685                                 'close'  => ']]',
3686                                 'sample' => wfMessage( 'link_sample' )->text(),
3687                                 'tip'    => wfMessage( 'link_tip' )->text(),
3688                         ),
3689                         array(
3690                                 'id'     => 'mw-editbutton-extlink',
3691                                 'open'   => '[',
3692                                 'close'  => ']',
3693                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3694                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3695                         ),
3696                         array(
3697                                 'id'     => 'mw-editbutton-headline',
3698                                 'open'   => "\n== ",
3699                                 'close'  => " ==\n",
3700                                 'sample' => wfMessage( 'headline_sample' )->text(),
3701                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3702                         ),
3703                         $imagesAvailable ? array(
3704                                 'id'     => 'mw-editbutton-image',
3705                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3706                                 'close'  => ']]',
3707                                 'sample' => wfMessage( 'image_sample' )->text(),
3708                                 'tip'    => wfMessage( 'image_tip' )->text(),
3709                         ) : false,
3710                         $imagesAvailable ? array(
3711                                 'id'     => 'mw-editbutton-media',
3712                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3713                                 'close'  => ']]',
3714                                 'sample' => wfMessage( 'media_sample' )->text(),
3715                                 'tip'    => wfMessage( 'media_tip' )->text(),
3716                         ) : false,
3717                         array(
3718                                 'id'     => 'mw-editbutton-nowiki',
3719                                 'open'   => "<nowiki>",
3720                                 'close'  => "</nowiki>",
3721                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3722                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3723                         ),
3724                         array(
3725                                 'id'     => 'mw-editbutton-signature',
3726                                 'open'   => '--~~~~',
3727                                 'close'  => '',
3728                                 'sample' => '',
3729                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3730                         ),
3731                         array(
3732                                 'id'     => 'mw-editbutton-hr',
3733                                 'open'   => "\n----\n",
3734                                 'close'  => '',
3735                                 'sample' => '',
3736                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3737                         )
3738                 );
3739
3740                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3741                 foreach ( $toolarray as $tool ) {
3742                         if ( !$tool ) {
3743                                 continue;
3744                         }
3745
3746                         $params = array(
3747                                 // Images are defined in ResourceLoaderEditToolbarModule
3748                                 false,
3749                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3750                                 // Older browsers show a "speedtip" type message only for ALT.
3751                                 // Ideally these should be different, realistically they
3752                                 // probably don't need to be.
3753                                 $tool['tip'],
3754                                 $tool['open'],
3755                                 $tool['close'],
3756                                 $tool['sample'],
3757                                 $tool['id'],
3758                         );
3759
3760                         $script .= Xml::encodeJsCall(
3761                                 'mw.toolbar.addButton',
3762                                 $params,
3763                                 ResourceLoader::inDebugMode()
3764                         );
3765                 }
3766
3767                 $script .= '});';
3768                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3769
3770                 $toolbar = '<div id="toolbar"></div>';
3771
3772                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3773
3774                 return $toolbar;
3775         }
3776
3777         /**
3778          * Returns an array of html code of the following checkboxes:
3779          * minor and watch
3780          *
3781          * @param int $tabindex Current tabindex
3782          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3783          *                 status of the checkbox
3784          *
3785          * @return array
3786          */
3787         public function getCheckboxes( &$tabindex, $checked ) {
3788                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3789
3790                 $checkboxes = array();
3791
3792                 // don't show the minor edit checkbox if it's a new page or section
3793                 if ( !$this->isNew ) {
3794                         $checkboxes['minor'] = '';
3795                         $minorLabel = wfMessage( 'minoredit' )->parse();
3796                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3797                                 $attribs = array(
3798                                         'tabindex' => ++$tabindex,
3799                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3800                                         'id' => 'wpMinoredit',
3801                                 );
3802                                 $minorEditHtml =
3803                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3804                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3805                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3806                                         ">{$minorLabel}</label>";
3807
3808                                 if ( $wgUseMediaWikiUIEverywhere ) {
3809                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3810                                                 $minorEditHtml .
3811                                         Html::closeElement( 'div' );
3812                                 } else {
3813                                         $checkboxes['minor'] = $minorEditHtml;
3814                                 }
3815                         }
3816                 }
3817
3818                 $watchLabel = wfMessage( 'watchthis' )->parse();
3819                 $checkboxes['watch'] = '';
3820                 if ( $wgUser->isLoggedIn() ) {
3821                         $attribs = array(
3822                                 'tabindex' => ++$tabindex,
3823                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3824                                 'id' => 'wpWatchthis',
3825                         );
3826                         $watchThisHtml =
3827                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3828                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3829                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3830                                 ">{$watchLabel}</label>";
3831                         if ( $wgUseMediaWikiUIEverywhere ) {
3832                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3833                                         $watchThisHtml .
3834                                         Html::closeElement( 'div' );
3835                         } else {
3836                                 $checkboxes['watch'] = $watchThisHtml;
3837                         }
3838                 }
3839                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3840                 return $checkboxes;
3841         }
3842
3843         /**
3844          * Returns an array of html code of the following buttons:
3845          * save, diff, preview and live
3846          *
3847          * @param int $tabindex Current tabindex
3848          *
3849          * @return array
3850          */
3851         public function getEditButtons( &$tabindex ) {
3852                 $buttons = array();
3853
3854                 $attribs = array(
3855                         'id' => 'wpSave',
3856                         'name' => 'wpSave',
3857                         'tabindex' => ++$tabindex,
3858                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3859                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3860                         $attribs, array( 'mw-ui-constructive' ) );
3861
3862                 ++$tabindex; // use the same for preview and live preview
3863                 $attribs = array(
3864                         'id' => 'wpPreview',
3865                         'name' => 'wpPreview',
3866                         'tabindex' => $tabindex,
3867                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3868                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3869                         $attribs );
3870                 $buttons['live'] = '';
3871
3872                 $attribs = array(
3873                         'id' => 'wpDiff',
3874                         'name' => 'wpDiff',
3875                         'tabindex' => ++$tabindex,
3876                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3877                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3878                         $attribs );
3879
3880                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3881                 return $buttons;
3882         }
3883
3884         /**
3885          * Output preview text only. This can be sucked into the edit page
3886          * via JavaScript, and saves the server time rendering the skin as
3887          * well as theoretically being more robust on the client (doesn't
3888          * disturb the edit box's undo history, won't eat your text on
3889          * failure, etc).
3890          *
3891          * @todo This doesn't include category or interlanguage links.
3892          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3893          *       or something...</s>" that might also require more skin
3894          *       initialization, so check whether that's a problem.
3895          */
3896         function livePreview() {
3897                 global $wgOut;
3898                 $wgOut->disable();
3899                 header( 'Content-type: text/xml; charset=utf-8' );
3900                 header( 'Cache-control: no-cache' );
3901
3902                 $previewText = $this->getPreviewText();
3903                 #$categories = $skin->getCategoryLinks();
3904
3905                 $s =
3906                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3907                         Xml::tags( 'livepreview', null,
3908                                 Xml::element( 'preview', null, $previewText )
3909                                 #.      Xml::element( 'category', null, $categories )
3910                         );
3911                 echo $s;
3912         }
3913
3914         /**
3915          * Creates a basic error page which informs the user that
3916          * they have attempted to edit a nonexistent section.
3917          */
3918         function noSuchSectionPage() {
3919                 global $wgOut;
3920
3921                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3922
3923                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3924                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3925                 $wgOut->addHTML( $res );
3926
3927                 $wgOut->returnToMain( false, $this->mTitle );
3928         }
3929
3930         /**
3931          * Show "your edit contains spam" page with your diff and text
3932          *
3933          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3934          */
3935         public function spamPageWithContent( $match = false ) {
3936                 global $wgOut, $wgLang;
3937                 $this->textbox2 = $this->textbox1;
3938
3939                 if ( is_array( $match ) ) {
3940                         $match = $wgLang->listToText( $match );
3941                 }
3942                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3943
3944                 $wgOut->addHTML( '<div id="spamprotected">' );
3945                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3946                 if ( $match ) {
3947                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3948                 }
3949                 $wgOut->addHTML( '</div>' );
3950
3951                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3952                 $this->showDiff();
3953
3954                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3955                 $this->showTextbox2();
3956
3957                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3958         }
3959
3960         /**
3961          * Check if the browser is on a blacklist of user-agents known to
3962          * mangle UTF-8 data on form submission. Returns true if Unicode
3963          * should make it through, false if it's known to be a problem.
3964          * @return bool
3965          */
3966         private function checkUnicodeCompliantBrowser() {
3967                 global $wgBrowserBlackList, $wgRequest;
3968
3969                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3970                 if ( $currentbrowser === false ) {
3971                         // No User-Agent header sent? Trust it by default...
3972                         return true;
3973                 }
3974
3975                 foreach ( $wgBrowserBlackList as $browser ) {
3976                         if ( preg_match( $browser, $currentbrowser ) ) {
3977                                 return false;
3978                         }
3979                 }
3980                 return true;
3981         }
3982
3983         /**
3984          * Filter an input field through a Unicode de-armoring process if it
3985          * came from an old browser with known broken Unicode editing issues.
3986          *
3987          * @param WebRequest $request
3988          * @param string $field
3989          * @return string
3990          */
3991         protected function safeUnicodeInput( $request, $field ) {
3992                 $text = rtrim( $request->getText( $field ) );
3993                 return $request->getBool( 'safemode' )
3994                         ? $this->unmakeSafe( $text )
3995                         : $text;
3996         }
3997
3998         /**
3999          * Filter an output field through a Unicode armoring process if it is
4000          * going to an old browser with known broken Unicode editing issues.
4001          *
4002          * @param string $text
4003          * @return string
4004          */
4005         protected function safeUnicodeOutput( $text ) {
4006                 global $wgContLang;
4007                 $codedText = $wgContLang->recodeForEdit( $text );
4008                 return $this->checkUnicodeCompliantBrowser()
4009                         ? $codedText
4010                         : $this->makeSafe( $codedText );
4011         }
4012
4013         /**
4014          * A number of web browsers are known to corrupt non-ASCII characters
4015          * in a UTF-8 text editing environment. To protect against this,
4016          * detected browsers will be served an armored version of the text,
4017          * with non-ASCII chars converted to numeric HTML character references.
4018          *
4019          * Preexisting such character references will have a 0 added to them
4020          * to ensure that round-trips do not alter the original data.
4021          *
4022          * @param string $invalue
4023          * @return string
4024          */
4025         private function makeSafe( $invalue ) {
4026                 // Armor existing references for reversibility.
4027                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4028
4029                 $bytesleft = 0;
4030                 $result = "";
4031                 $working = 0;
4032                 $valueLength = strlen( $invalue );
4033                 for ( $i = 0; $i < $valueLength; $i++ ) {
4034                         $bytevalue = ord( $invalue[$i] );
4035                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4036                                 $result .= chr( $bytevalue );
4037                                 $bytesleft = 0;
4038                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4039                                 $working = $working << 6;
4040                                 $working += ( $bytevalue & 0x3F );
4041                                 $bytesleft--;
4042                                 if ( $bytesleft <= 0 ) {
4043                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4044                                 }
4045                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4046                                 $working = $bytevalue & 0x1F;
4047                                 $bytesleft = 1;
4048                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4049                                 $working = $bytevalue & 0x0F;
4050                                 $bytesleft = 2;
4051                         } else { // 1111 0xxx
4052                                 $working = $bytevalue & 0x07;
4053                                 $bytesleft = 3;
4054                         }
4055                 }
4056                 return $result;
4057         }
4058
4059         /**
4060          * Reverse the previously applied transliteration of non-ASCII characters
4061          * back to UTF-8. Used to protect data from corruption by broken web browsers
4062          * as listed in $wgBrowserBlackList.
4063          *
4064          * @param string $invalue
4065          * @return string
4066          */
4067         private function unmakeSafe( $invalue ) {
4068                 $result = "";
4069                 $valueLength = strlen( $invalue );
4070                 for ( $i = 0; $i < $valueLength; $i++ ) {
4071                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4072                                 $i += 3;
4073                                 $hexstring = "";
4074                                 do {
4075                                         $hexstring .= $invalue[$i];
4076                                         $i++;
4077                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4078
4079                                 // Do some sanity checks. These aren't needed for reversibility,
4080                                 // but should help keep the breakage down if the editor
4081                                 // breaks one of the entities whilst editing.
4082                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4083                                         $codepoint = hexdec( $hexstring );
4084                                         $result .= codepointToUtf8( $codepoint );
4085                                 } else {
4086                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4087                                 }
4088                         } else {
4089                                 $result .= substr( $invalue, $i, 1 );
4090                         }
4091                 }
4092                 // reverse the transform that we made for reversibility reasons.
4093                 return strtr( $result, array( "&#x0" => "&#x" ) );
4094         }
4095 }