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