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 current content of the page. This is basically similar to
1141          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1142          * content object is returned instead of null.
1143          *
1144          * @since 1.21
1145          * @return Content
1146          */
1147         protected function getCurrentContent() {
1148                 $rev = $this->mArticle->getRevision();
1149                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1150
1151                 if ( $content === false || $content === null ) {
1152                         if ( !$this->contentModel ) {
1153                                 $this->contentModel = $this->getTitle()->getContentModel();
1154                         }
1155                         $handler = ContentHandler::getForModelID( $this->contentModel );
1156
1157                         return $handler->makeEmptyContent();
1158                 } else {
1159                         # nasty side-effect, but needed for consistency
1160                         $this->contentModel = $rev->getContentModel();
1161                         $this->contentFormat = $rev->getContentFormat();
1162
1163                         return $content;
1164                 }
1165         }
1166
1167         /**
1168          * Use this method before edit() to preload some content into the edit box
1169          *
1170          * @param Content $content
1171          *
1172          * @since 1.21
1173          */
1174         public function setPreloadedContent( Content $content ) {
1175                 $this->mPreloadContent = $content;
1176         }
1177
1178         /**
1179          * Get the contents to be preloaded into the box, either set by
1180          * an earlier setPreloadText() or by loading the given page.
1181          *
1182          * @param string $preload Representing the title to preload from.
1183          * @param array $params Parameters to use (interface-message style) in the preloaded text
1184          *
1185          * @return Content
1186          *
1187          * @since 1.21
1188          */
1189         protected function getPreloadedContent( $preload, $params = array() ) {
1190                 global $wgUser;
1191
1192                 if ( !empty( $this->mPreloadContent ) ) {
1193                         return $this->mPreloadContent;
1194                 }
1195
1196                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1197
1198                 if ( $preload === '' ) {
1199                         return $handler->makeEmptyContent();
1200                 }
1201
1202                 $title = Title::newFromText( $preload );
1203                 # Check for existence to avoid getting MediaWiki:Noarticletext
1204                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1205                         //TODO: somehow show a warning to the user!
1206                         return $handler->makeEmptyContent();
1207                 }
1208
1209                 $page = WikiPage::factory( $title );
1210                 if ( $page->isRedirect() ) {
1211                         $title = $page->getRedirectTarget();
1212                         # Same as before
1213                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1214                                 //TODO: somehow show a warning to the user!
1215                                 return $handler->makeEmptyContent();
1216                         }
1217                         $page = WikiPage::factory( $title );
1218                 }
1219
1220                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1221                 $content = $page->getContent( Revision::RAW );
1222
1223                 if ( !$content ) {
1224                         //TODO: somehow show a warning to the user!
1225                         return $handler->makeEmptyContent();
1226                 }
1227
1228                 if ( $content->getModel() !== $handler->getModelID() ) {
1229                         $converted = $content->convert( $handler->getModelID() );
1230
1231                         if ( !$converted ) {
1232                                 //TODO: somehow show a warning to the user!
1233                                 wfDebug( "Attempt to preload incompatible content: "
1234                                                 . "can't convert " . $content->getModel()
1235                                                 . " to " . $handler->getModelID() );
1236
1237                                 return $handler->makeEmptyContent();
1238                         }
1239
1240                         $content = $converted;
1241                 }
1242
1243                 return $content->preloadTransform( $title, $parserOptions, $params );
1244         }
1245
1246         /**
1247          * Make sure the form isn't faking a user's credentials.
1248          *
1249          * @param WebRequest $request
1250          * @return bool
1251          * @private
1252          */
1253         function tokenOk( &$request ) {
1254                 global $wgUser;
1255                 $token = $request->getVal( 'wpEditToken' );
1256                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1257                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1258                 return $this->mTokenOk;
1259         }
1260
1261         /**
1262          * Sets post-edit cookie indicating the user just saved a particular revision.
1263          *
1264          * This uses a temporary cookie for each revision ID so separate saves will never
1265          * interfere with each other.
1266          *
1267          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1268          * the redirect.  It must be clearable by JavaScript code, so it must not be
1269          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1270          * variable.
1271          *
1272          * If the variable were set on the server, it would be cached, which is unwanted
1273          * since the post-edit state should only apply to the load right after the save.
1274          *
1275          * @param int $statusValue The status value (to check for new article status)
1276          */
1277         protected function setPostEditCookie( $statusValue ) {
1278                 $revisionId = $this->mArticle->getLatest();
1279                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1280
1281                 $val = 'saved';
1282                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1283                         $val = 'created';
1284                 } elseif ( $this->oldid ) {
1285                         $val = 'restored';
1286                 }
1287
1288                 $response = RequestContext::getMain()->getRequest()->response();
1289                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1290                         'httpOnly' => false,
1291                 ) );
1292         }
1293
1294         /**
1295          * Attempt submission
1296          * @param array $resultDetails See docs for $result in internalAttemptSave
1297          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1298          * @return Status The resulting status object.
1299          */
1300         public function attemptSave( &$resultDetails = false ) {
1301                 global $wgUser;
1302
1303                 # Allow bots to exempt some edits from bot flagging
1304                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1305                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1306
1307                 Hooks::run( 'EditPage::attemptSave:after', array( $this, $status, $resultDetails ) );
1308
1309                 return $status;
1310         }
1311
1312         /**
1313          * Handle status, such as after attempt save
1314          *
1315          * @param Status $status
1316          * @param array|bool $resultDetails
1317          *
1318          * @throws ErrorPageError
1319          * @return bool False, if output is done, true if rest of the form should be displayed
1320          */
1321         private function handleStatus( Status $status, $resultDetails ) {
1322                 global $wgUser, $wgOut;
1323
1324                 /**
1325                  * @todo FIXME: once the interface for internalAttemptSave() is made
1326                  *   nicer, this should use the message in $status
1327                  */
1328                 if ( $status->value == self::AS_SUCCESS_UPDATE
1329                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1330                 ) {
1331                         $this->didSave = true;
1332                         if ( !$resultDetails['nullEdit'] ) {
1333                                 $this->setPostEditCookie( $status->value );
1334                         }
1335                 }
1336
1337                 switch ( $status->value ) {
1338                         case self::AS_HOOK_ERROR_EXPECTED:
1339                         case self::AS_CONTENT_TOO_BIG:
1340                         case self::AS_ARTICLE_WAS_DELETED:
1341                         case self::AS_CONFLICT_DETECTED:
1342                         case self::AS_SUMMARY_NEEDED:
1343                         case self::AS_TEXTBOX_EMPTY:
1344                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1345                         case self::AS_END:
1346                         case self::AS_BLANK_ARTICLE:
1347                         case self::AS_SELF_REDIRECT:
1348                                 return true;
1349
1350                         case self::AS_HOOK_ERROR:
1351                                 return false;
1352
1353                         case self::AS_PARSE_ERROR:
1354                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1355                                 return true;
1356
1357                         case self::AS_SUCCESS_NEW_ARTICLE:
1358                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1359                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1360                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1361                                 return false;
1362
1363                         case self::AS_SUCCESS_UPDATE:
1364                                 $extraQuery = '';
1365                                 $sectionanchor = $resultDetails['sectionanchor'];
1366
1367                                 // Give extensions a chance to modify URL query on update
1368                                 Hooks::run(
1369                                         'ArticleUpdateBeforeRedirect',
1370                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1371                                 );
1372
1373                                 if ( $resultDetails['redirect'] ) {
1374                                         if ( $extraQuery == '' ) {
1375                                                 $extraQuery = 'redirect=no';
1376                                         } else {
1377                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1378                                         }
1379                                 }
1380                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1381                                 return false;
1382
1383                         case self::AS_SPAM_ERROR:
1384                                 $this->spamPageWithContent( $resultDetails['spam'] );
1385                                 return false;
1386
1387                         case self::AS_BLOCKED_PAGE_FOR_USER:
1388                                 throw new UserBlockedError( $wgUser->getBlock() );
1389
1390                         case self::AS_IMAGE_REDIRECT_ANON:
1391                         case self::AS_IMAGE_REDIRECT_LOGGED:
1392                                 throw new PermissionsError( 'upload' );
1393
1394                         case self::AS_READ_ONLY_PAGE_ANON:
1395                         case self::AS_READ_ONLY_PAGE_LOGGED:
1396                                 throw new PermissionsError( 'edit' );
1397
1398                         case self::AS_READ_ONLY_PAGE:
1399                                 throw new ReadOnlyError;
1400
1401                         case self::AS_RATE_LIMITED:
1402                                 throw new ThrottledError();
1403
1404                         case self::AS_NO_CREATE_PERMISSION:
1405                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1406                                 throw new PermissionsError( $permission );
1407
1408                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1409                                 throw new PermissionsError( 'editcontentmodel' );
1410
1411                         default:
1412                                 // We don't recognize $status->value. The only way that can happen
1413                                 // is if an extension hook aborted from inside ArticleSave.
1414                                 // Render the status object into $this->hookError
1415                                 // FIXME this sucks, we should just use the Status object throughout
1416                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1417                                         '</div>';
1418                                 return true;
1419                 }
1420         }
1421
1422         /**
1423          * Run hooks that can filter edits just before they get saved.
1424          *
1425          * @param Content $content The Content to filter.
1426          * @param Status $status For reporting the outcome to the caller
1427          * @param User $user The user performing the edit
1428          *
1429          * @return bool
1430          */
1431         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1432                 // Run old style post-section-merge edit filter
1433                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1434                         array( $this, $content, &$this->hookError, $this->summary ) )
1435                 ) {
1436                         # Error messages etc. could be handled within the hook...
1437                         $status->fatal( 'hookaborted' );
1438                         $status->value = self::AS_HOOK_ERROR;
1439                         return false;
1440                 } elseif ( $this->hookError != '' ) {
1441                         # ...or the hook could be expecting us to produce an error
1442                         $status->fatal( 'hookaborted' );
1443                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1444                         return false;
1445                 }
1446
1447                 // Run new style post-section-merge edit filter
1448                 if ( !Hooks::run( 'EditFilterMergedContent',
1449                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1450                                 $user, $this->minoredit ) )
1451                 ) {
1452                         # Error messages etc. could be handled within the hook...
1453                         if ( $status->isGood() ) {
1454                                 $status->fatal( 'hookaborted' );
1455                                 // Not setting $this->hookError here is a hack to allow the hook
1456                                 // to cause a return to the edit page without $this->hookError
1457                                 // being set. This is used by ConfirmEdit to display a captcha
1458                                 // without any error message cruft.
1459                         } else {
1460                                 $this->hookError = $status->getWikiText();
1461                         }
1462                         // Use the existing $status->value if the hook set it
1463                         if ( !$status->value ) {
1464                                 $status->value = self::AS_HOOK_ERROR;
1465                         }
1466                         return false;
1467                 } elseif ( !$status->isOK() ) {
1468                         # ...or the hook could be expecting us to produce an error
1469                         // FIXME this sucks, we should just use the Status object throughout
1470                         $this->hookError = $status->getWikiText();
1471                         $status->fatal( 'hookaborted' );
1472                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1473                         return false;
1474                 }
1475
1476                 return true;
1477         }
1478
1479         /**
1480          * Return the summary to be used for a new section.
1481          *
1482          * @param string $sectionanchor Set to the section anchor text
1483          * @return string
1484          */
1485         private function newSectionSummary( &$sectionanchor = null ) {
1486                 global $wgParser;
1487
1488                 if ( $this->sectiontitle !== '' ) {
1489                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1490                         // If no edit summary was specified, create one automatically from the section
1491                         // title and have it link to the new section. Otherwise, respect the summary as
1492                         // passed.
1493                         if ( $this->summary === '' ) {
1494                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1495                                 return wfMessage( 'newsectionsummary' )
1496                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1497                         }
1498                 } elseif ( $this->summary !== '' ) {
1499                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1500                         # This is a new section, so create a link to the new section
1501                         # in the revision summary.
1502                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1503                         return wfMessage( 'newsectionsummary' )
1504                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1505                 }
1506                 return $this->summary;
1507         }
1508
1509         /**
1510          * Attempt submission (no UI)
1511          *
1512          * @param array $result Array to add statuses to, currently with the
1513          *   possible keys:
1514          *   - spam (string): Spam string from content if any spam is detected by
1515          *     matchSpamRegex.
1516          *   - sectionanchor (string): Section anchor for a section save.
1517          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1518          *     false otherwise.
1519          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1520          *     revision is a redirect.
1521          * @param bool $bot True if edit is being made under the bot right.
1522          *
1523          * @return Status Status object, possibly with a message, but always with
1524          *   one of the AS_* constants in $status->value,
1525          *
1526          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1527          *   various error display idiosyncrasies. There are also lots of cases
1528          *   where error metadata is set in the object and retrieved later instead
1529          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1530          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1531          * time.
1532          */
1533         function internalAttemptSave( &$result, $bot = false ) {
1534                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1535
1536                 $status = Status::newGood();
1537
1538                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1539                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1540                         $status->fatal( 'hookaborted' );
1541                         $status->value = self::AS_HOOK_ERROR;
1542                         return $status;
1543                 }
1544
1545                 $spam = $wgRequest->getText( 'wpAntispam' );
1546                 if ( $spam !== '' ) {
1547                         wfDebugLog(
1548                                 'SimpleAntiSpam',
1549                                 $wgUser->getName() .
1550                                 ' editing "' .
1551                                 $this->mTitle->getPrefixedText() .
1552                                 '" submitted bogus field "' .
1553                                 $spam .
1554                                 '"'
1555                         );
1556                         $status->fatal( 'spamprotectionmatch', false );
1557                         $status->value = self::AS_SPAM_ERROR;
1558                         return $status;
1559                 }
1560
1561                 try {
1562                         # Construct Content object
1563                         $textbox_content = $this->toEditContent( $this->textbox1 );
1564                 } catch ( MWContentSerializationException $ex ) {
1565                         $status->fatal(
1566                                 'content-failed-to-parse',
1567                                 $this->contentModel,
1568                                 $this->contentFormat,
1569                                 $ex->getMessage()
1570                         );
1571                         $status->value = self::AS_PARSE_ERROR;
1572                         return $status;
1573                 }
1574
1575                 # Check image redirect
1576                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1577                         $textbox_content->isRedirect() &&
1578                         !$wgUser->isAllowed( 'upload' )
1579                 ) {
1580                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1581                                 $status->setResult( false, $code );
1582
1583                                 return $status;
1584                 }
1585
1586                 # Check for spam
1587                 $match = self::matchSummarySpamRegex( $this->summary );
1588                 if ( $match === false && $this->section == 'new' ) {
1589                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1590                         # regular summaries, it is added to the actual wikitext.
1591                         if ( $this->sectiontitle !== '' ) {
1592                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1593                                 $match = self::matchSpamRegex( $this->sectiontitle );
1594                         } else {
1595                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1596                                 # is used with the 'summary' parameter.
1597                                 $match = self::matchSpamRegex( $this->summary );
1598                         }
1599                 }
1600                 if ( $match === false ) {
1601                         $match = self::matchSpamRegex( $this->textbox1 );
1602                 }
1603                 if ( $match !== false ) {
1604                         $result['spam'] = $match;
1605                         $ip = $wgRequest->getIP();
1606                         $pdbk = $this->mTitle->getPrefixedDBkey();
1607                         $match = str_replace( "\n", '', $match );
1608                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1609                         $status->fatal( 'spamprotectionmatch', $match );
1610                         $status->value = self::AS_SPAM_ERROR;
1611                         return $status;
1612                 }
1613                 if ( !Hooks::run(
1614                         'EditFilter',
1615                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1616                 ) {
1617                         # Error messages etc. could be handled within the hook...
1618                         $status->fatal( 'hookaborted' );
1619                         $status->value = self::AS_HOOK_ERROR;
1620                         return $status;
1621                 } elseif ( $this->hookError != '' ) {
1622                         # ...or the hook could be expecting us to produce an error
1623                         $status->fatal( 'hookaborted' );
1624                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1625                         return $status;
1626                 }
1627
1628                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1629                         // Auto-block user's IP if the account was "hard" blocked
1630                         $wgUser->spreadAnyEditBlock();
1631                         # Check block state against master, thus 'false'.
1632                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1633                         return $status;
1634                 }
1635
1636                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1637                 if ( $this->kblength > $wgMaxArticleSize ) {
1638                         // Error will be displayed by showEditForm()
1639                         $this->tooBig = true;
1640                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1641                         return $status;
1642                 }
1643
1644                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1645                         if ( $wgUser->isAnon() ) {
1646                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1647                                 return $status;
1648                         } else {
1649                                 $status->fatal( 'readonlytext' );
1650                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1651                                 return $status;
1652                         }
1653                 }
1654
1655                 if ( $this->contentModel !== $this->mTitle->getContentModel()
1656                         && !$wgUser->isAllowed( 'editcontentmodel' )
1657                 ) {
1658                         $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1659                         return $status;
1660                 }
1661
1662                 if ( $this->changeTags ) {
1663                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1664                                 $this->changeTags, $wgUser );
1665                         if ( !$changeTagsStatus->isOK() ) {
1666                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1667                                 return $changeTagsStatus;
1668                         }
1669                 }
1670
1671                 if ( wfReadOnly() ) {
1672                         $status->fatal( 'readonlytext' );
1673                         $status->value = self::AS_READ_ONLY_PAGE;
1674                         return $status;
1675                 }
1676                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1677                         $status->fatal( 'actionthrottledtext' );
1678                         $status->value = self::AS_RATE_LIMITED;
1679                         return $status;
1680                 }
1681
1682                 # If the article has been deleted while editing, don't save it without
1683                 # confirmation
1684                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1685                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1686                         return $status;
1687                 }
1688
1689                 # Load the page data from the master. If anything changes in the meantime,
1690                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1691                 $this->mArticle->loadPageData( 'fromdbmaster' );
1692                 $new = !$this->mArticle->exists();
1693
1694                 if ( $new ) {
1695                         // Late check for create permission, just in case *PARANOIA*
1696                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1697                                 $status->fatal( 'nocreatetext' );
1698                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1699                                 wfDebug( __METHOD__ . ": no create permission\n" );
1700                                 return $status;
1701                         }
1702
1703                         // Don't save a new page if it's blank or if it's a MediaWiki:
1704                         // message with content equivalent to default (allow empty pages
1705                         // in this case to disable messages, see bug 50124)
1706                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1707                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1708                                 $defaultText = $defaultMessageText;
1709                         } else {
1710                                 $defaultText = '';
1711                         }
1712
1713                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1714                                 $this->blankArticle = true;
1715                                 $status->fatal( 'blankarticle' );
1716                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1717                                 return $status;
1718                         }
1719
1720                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1721                                 return $status;
1722                         }
1723
1724                         $content = $textbox_content;
1725
1726                         $result['sectionanchor'] = '';
1727                         if ( $this->section == 'new' ) {
1728                                 if ( $this->sectiontitle !== '' ) {
1729                                         // Insert the section title above the content.
1730                                         $content = $content->addSectionHeader( $this->sectiontitle );
1731                                 } elseif ( $this->summary !== '' ) {
1732                                         // Insert the section title above the content.
1733                                         $content = $content->addSectionHeader( $this->summary );
1734                                 }
1735                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1736                         }
1737
1738                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1739
1740                 } else { # not $new
1741
1742                         # Article exists. Check for edit conflict.
1743
1744                         $this->mArticle->clear(); # Force reload of dates, etc.
1745                         $timestamp = $this->mArticle->getTimestamp();
1746
1747                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1748
1749                         if ( $timestamp != $this->edittime ) {
1750                                 $this->isConflict = true;
1751                                 if ( $this->section == 'new' ) {
1752                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1753                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1754                                         ) {
1755                                                 // Probably a duplicate submission of a new comment.
1756                                                 // This can happen when squid resends a request after
1757                                                 // a timeout but the first one actually went through.
1758                                                 wfDebug( __METHOD__
1759                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1760                                         } else {
1761                                                 // New comment; suppress conflict.
1762                                                 $this->isConflict = false;
1763                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1764                                         }
1765                                 } elseif ( $this->section == ''
1766                                         && Revision::userWasLastToEdit(
1767                                                 DB_MASTER, $this->mTitle->getArticleID(),
1768                                                 $wgUser->getId(), $this->edittime
1769                                         )
1770                                 ) {
1771                                         # Suppress edit conflict with self, except for section edits where merging is required.
1772                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1773                                         $this->isConflict = false;
1774                                 }
1775                         }
1776
1777                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1778                         if ( $this->sectiontitle !== '' ) {
1779                                 $sectionTitle = $this->sectiontitle;
1780                         } else {
1781                                 $sectionTitle = $this->summary;
1782                         }
1783
1784                         $content = null;
1785
1786                         if ( $this->isConflict ) {
1787                                 wfDebug( __METHOD__
1788                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1789                                         . " (article time '{$timestamp}')\n" );
1790
1791                                 $content = $this->mArticle->replaceSectionContent(
1792                                         $this->section,
1793                                         $textbox_content,
1794                                         $sectionTitle,
1795                                         $this->edittime
1796                                 );
1797                         } else {
1798                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1799                                 $content = $this->mArticle->replaceSectionContent(
1800                                         $this->section,
1801                                         $textbox_content,
1802                                         $sectionTitle
1803                                 );
1804                         }
1805
1806                         if ( is_null( $content ) ) {
1807                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1808                                 $this->isConflict = true;
1809                                 $content = $textbox_content; // do not try to merge here!
1810                         } elseif ( $this->isConflict ) {
1811                                 # Attempt merge
1812                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1813                                         // Successful merge! Maybe we should tell the user the good news?
1814                                         $this->isConflict = false;
1815                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1816                                 } else {
1817                                         $this->section = '';
1818                                         $this->textbox1 = ContentHandler::getContentText( $content );
1819                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1820                                 }
1821                         }
1822
1823                         if ( $this->isConflict ) {
1824                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1825                                 return $status;
1826                         }
1827
1828                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1829                                 return $status;
1830                         }
1831
1832                         if ( $this->section == 'new' ) {
1833                                 // Handle the user preference to force summaries here
1834                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1835                                         $this->missingSummary = true;
1836                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1837                                         $status->value = self::AS_SUMMARY_NEEDED;
1838                                         return $status;
1839                                 }
1840
1841                                 // Do not allow the user to post an empty comment
1842                                 if ( $this->textbox1 == '' ) {
1843                                         $this->missingComment = true;
1844                                         $status->fatal( 'missingcommenttext' );
1845                                         $status->value = self::AS_TEXTBOX_EMPTY;
1846                                         return $status;
1847                                 }
1848                         } elseif ( !$this->allowBlankSummary
1849                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1850                                 && !$content->isRedirect()
1851                                 && md5( $this->summary ) == $this->autoSumm
1852                         ) {
1853                                 $this->missingSummary = true;
1854                                 $status->fatal( 'missingsummary' );
1855                                 $status->value = self::AS_SUMMARY_NEEDED;
1856                                 return $status;
1857                         }
1858
1859                         # All's well
1860                         $sectionanchor = '';
1861                         if ( $this->section == 'new' ) {
1862                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1863                         } elseif ( $this->section != '' ) {
1864                                 # Try to get a section anchor from the section source, redirect
1865                                 # to edited section if header found.
1866                                 # XXX: Might be better to integrate this into Article::replaceSection
1867                                 # for duplicate heading checking and maybe parsing.
1868                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1869                                 # We can't deal with anchors, includes, html etc in the header for now,
1870                                 # headline would need to be parsed to improve this.
1871                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1872                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1873                                 }
1874                         }
1875                         $result['sectionanchor'] = $sectionanchor;
1876
1877                         // Save errors may fall down to the edit form, but we've now
1878                         // merged the section into full text. Clear the section field
1879                         // so that later submission of conflict forms won't try to
1880                         // replace that into a duplicated mess.
1881                         $this->textbox1 = $this->toEditText( $content );
1882                         $this->section = '';
1883
1884                         $status->value = self::AS_SUCCESS_UPDATE;
1885                 }
1886
1887                 if ( !$this->allowSelfRedirect
1888                         && $content->isRedirect()
1889                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1890                 ) {
1891                         // If the page already redirects to itself, don't warn.
1892                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1893                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1894                                 $this->selfRedirect = true;
1895                                 $status->fatal( 'selfredirect' );
1896                                 $status->value = self::AS_SELF_REDIRECT;
1897                                 return $status;
1898                         }
1899                 }
1900
1901                 // Check for length errors again now that the section is merged in
1902                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1903                 if ( $this->kblength > $wgMaxArticleSize ) {
1904                         $this->tooBig = true;
1905                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1906                         return $status;
1907                 }
1908
1909                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1910                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1911                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1912                         ( $bot ? EDIT_FORCE_BOT : 0 );
1913
1914                 $doEditStatus = $this->mArticle->doEditContent(
1915                         $content,
1916                         $this->summary,
1917                         $flags,
1918                         false,
1919                         null,
1920                         $content->getDefaultFormat()
1921                 );
1922
1923                 if ( !$doEditStatus->isOK() ) {
1924                         // Failure from doEdit()
1925                         // Show the edit conflict page for certain recognized errors from doEdit(),
1926                         // but don't show it for errors from extension hooks
1927                         $errors = $doEditStatus->getErrorsArray();
1928                         if ( in_array( $errors[0][0],
1929                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1930                         ) {
1931                                 $this->isConflict = true;
1932                                 // Destroys data doEdit() put in $status->value but who cares
1933                                 $doEditStatus->value = self::AS_END;
1934                         }
1935                         return $doEditStatus;
1936                 }
1937
1938                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1939                 if ( $result['nullEdit'] ) {
1940                         // We don't know if it was a null edit until now, so increment here
1941                         $wgUser->pingLimiter( 'linkpurge' );
1942                 }
1943                 $result['redirect'] = $content->isRedirect();
1944
1945                 $this->updateWatchlist();
1946
1947                 if ( $this->changeTags && isset( $doEditStatus->value['revision'] ) ) {
1948                         // If a revision was created, apply any change tags that were requested
1949                         ChangeTags::addTags(
1950                                 $this->changeTags,
1951                                 isset( $doEditStatus->value['rc'] ) ? $doEditStatus->value['rc']->mAttribs['rc_id'] : null,
1952                                 $doEditStatus->value['revision']->getId()
1953                         );
1954                 }
1955
1956                 return $status;
1957         }
1958
1959         /**
1960          * Register the change of watch status
1961          */
1962         protected function updateWatchlist() {
1963                 global $wgUser;
1964
1965                 if ( $wgUser->isLoggedIn()
1966                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1967                 ) {
1968                         $fname = __METHOD__;
1969                         $title = $this->mTitle;
1970                         $watch = $this->watchthis;
1971
1972                         // Do this in its own transaction to reduce contention...
1973                         $dbw = wfGetDB( DB_MASTER );
1974                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1975                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1976                         } );
1977                 }
1978         }
1979
1980         /**
1981          * Attempts to do 3-way merge of edit content with a base revision
1982          * and current content, in case of edit conflict, in whichever way appropriate
1983          * for the content type.
1984          *
1985          * @since 1.21
1986          *
1987          * @param Content $editContent
1988          *
1989          * @return bool
1990          */
1991         private function mergeChangesIntoContent( &$editContent ) {
1992
1993                 $db = wfGetDB( DB_MASTER );
1994
1995                 // This is the revision the editor started from
1996                 $baseRevision = $this->getBaseRevision();
1997                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1998
1999                 if ( is_null( $baseContent ) ) {
2000                         return false;
2001                 }
2002
2003                 // The current state, we want to merge updates into it
2004                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2005                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2006
2007                 if ( is_null( $currentContent ) ) {
2008                         return false;
2009                 }
2010
2011                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2012
2013                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2014
2015                 if ( $result ) {
2016                         $editContent = $result;
2017                         return true;
2018                 }
2019
2020                 return false;
2021         }
2022
2023         /**
2024          * @return Revision
2025          */
2026         function getBaseRevision() {
2027                 if ( !$this->mBaseRevision ) {
2028                         $db = wfGetDB( DB_MASTER );
2029                         $this->mBaseRevision = Revision::loadFromTimestamp(
2030                                 $db, $this->mTitle, $this->edittime );
2031                 }
2032                 return $this->mBaseRevision;
2033         }
2034
2035         /**
2036          * Check given input text against $wgSpamRegex, and return the text of the first match.
2037          *
2038          * @param string $text
2039          *
2040          * @return string|bool Matching string or false
2041          */
2042         public static function matchSpamRegex( $text ) {
2043                 global $wgSpamRegex;
2044                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2045                 $regexes = (array)$wgSpamRegex;
2046                 return self::matchSpamRegexInternal( $text, $regexes );
2047         }
2048
2049         /**
2050          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2051          *
2052          * @param string $text
2053          *
2054          * @return string|bool Matching string or false
2055          */
2056         public static function matchSummarySpamRegex( $text ) {
2057                 global $wgSummarySpamRegex;
2058                 $regexes = (array)$wgSummarySpamRegex;
2059                 return self::matchSpamRegexInternal( $text, $regexes );
2060         }
2061
2062         /**
2063          * @param string $text
2064          * @param array $regexes
2065          * @return bool|string
2066          */
2067         protected static function matchSpamRegexInternal( $text, $regexes ) {
2068                 foreach ( $regexes as $regex ) {
2069                         $matches = array();
2070                         if ( preg_match( $regex, $text, $matches ) ) {
2071                                 return $matches[0];
2072                         }
2073                 }
2074                 return false;
2075         }
2076
2077         function setHeaders() {
2078                 global $wgOut, $wgUser, $wgAjaxEditStash;
2079
2080                 $wgOut->addModules( 'mediawiki.action.edit' );
2081                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2082
2083                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2084                         // The addition of default buttons is handled by getEditToolbar() which
2085                         // has its own dependency on this module. The call here ensures the module
2086                         // is loaded in time (it has position "top") for other modules to register
2087                         // buttons (e.g. extensions, gadgets, user scripts).
2088                         $wgOut->addModules( 'mediawiki.toolbar' );
2089                 }
2090
2091                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2092                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2093                 }
2094
2095                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2096                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2097                 }
2098
2099                 if ( $wgAjaxEditStash ) {
2100                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2101                 }
2102
2103                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2104
2105                 # Enabled article-related sidebar, toplinks, etc.
2106                 $wgOut->setArticleRelated( true );
2107
2108                 $contextTitle = $this->getContextTitle();
2109                 if ( $this->isConflict ) {
2110                         $msg = 'editconflict';
2111                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2112                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2113                 } else {
2114                         $msg = $contextTitle->exists()
2115                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2116                                         && $contextTitle->getDefaultMessageText() !== false
2117                                 )
2118                                 ? 'editing'
2119                                 : 'creating';
2120                 }
2121
2122                 # Use the title defined by DISPLAYTITLE magic word when present
2123                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2124                 if ( $displayTitle === false ) {
2125                         $displayTitle = $contextTitle->getPrefixedText();
2126                 }
2127                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2128                 # Transmit the name of the message to JavaScript for live preview
2129                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2130                 $wgOut->addJsConfigVars( 'wgEditMessage', $msg );
2131         }
2132
2133         /**
2134          * Show all applicable editing introductions
2135          */
2136         protected function showIntro() {
2137                 global $wgOut, $wgUser;
2138                 if ( $this->suppressIntro ) {
2139                         return;
2140                 }
2141
2142                 $namespace = $this->mTitle->getNamespace();
2143
2144                 if ( $namespace == NS_MEDIAWIKI ) {
2145                         # Show a warning if editing an interface message
2146                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2147                         # If this is a default message (but not css or js),
2148                         # show a hint that it is translatable on translatewiki.net
2149                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2150                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2151                         ) {
2152                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2153                                 if ( $defaultMessageText !== false ) {
2154                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2155                                                 'translateinterface' );
2156                                 }
2157                         }
2158                 } elseif ( $namespace == NS_FILE ) {
2159                         # Show a hint to shared repo
2160                         $file = wfFindFile( $this->mTitle );
2161                         if ( $file && !$file->isLocal() ) {
2162                                 $descUrl = $file->getDescriptionUrl();
2163                                 # there must be a description url to show a hint to shared repo
2164                                 if ( $descUrl ) {
2165                                         if ( !$this->mTitle->exists() ) {
2166                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2167                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2168                                                 ) );
2169                                         } else {
2170                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2171                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2172                                                 ) );
2173                                         }
2174                                 }
2175                         }
2176                 }
2177
2178                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2179                 # Show log extract when the user is currently blocked
2180                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2181                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2182                         $username = $parts[0];
2183                         $user = User::newFromName( $username, false /* allow IP users*/ );
2184                         $ip = User::isIP( $username );
2185                         $block = Block::newFromTarget( $user, $user );
2186                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2187                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2188                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2189                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2190                                 # Show log extract if the user is currently blocked
2191                                 LogEventsList::showLogExtract(
2192                                         $wgOut,
2193                                         'block',
2194                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2195                                         '',
2196                                         array(
2197                                                 'lim' => 1,
2198                                                 'showIfEmpty' => false,
2199                                                 'msgKey' => array(
2200                                                         'blocked-notice-logextract',
2201                                                         $user->getName() # Support GENDER in notice
2202                                                 )
2203                                         )
2204                                 );
2205                         }
2206                 }
2207                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2208                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2209                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2210                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2211                         ) );
2212                         if ( $wgUser->isLoggedIn() ) {
2213                                 $wgOut->wrapWikiMsg(
2214                                         // Suppress the external link icon, consider the help url an internal one
2215                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2216                                         array(
2217                                                 'newarticletext',
2218                                                 $helpLink
2219                                         )
2220                                 );
2221                         } else {
2222                                 $wgOut->wrapWikiMsg(
2223                                         // Suppress the external link icon, consider the help url an internal one
2224                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2225                                         array(
2226                                                 'newarticletextanon',
2227                                                 $helpLink
2228                                         )
2229                                 );
2230                         }
2231                 }
2232                 # Give a notice if the user is editing a deleted/moved page...
2233                 if ( !$this->mTitle->exists() ) {
2234                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2235                                 '',
2236                                 array(
2237                                         'lim' => 10,
2238                                         'conds' => array( "log_action != 'revision'" ),
2239                                         'showIfEmpty' => false,
2240                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2241                                 )
2242                         );
2243                 }
2244         }
2245
2246         /**
2247          * Attempt to show a custom editing introduction, if supplied
2248          *
2249          * @return bool
2250          */
2251         protected function showCustomIntro() {
2252                 if ( $this->editintro ) {
2253                         $title = Title::newFromText( $this->editintro );
2254                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2255                                 global $wgOut;
2256                                 // Added using template syntax, to take <noinclude>'s into account.
2257                                 $wgOut->addWikiTextTitleTidy(
2258                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2259                                         $this->mTitle
2260                                 );
2261                                 return true;
2262                         }
2263                 }
2264                 return false;
2265         }
2266
2267         /**
2268          * Gets an editable textual representation of $content.
2269          * The textual representation can be turned by into a Content object by the
2270          * toEditContent() method.
2271          *
2272          * If $content is null or false or a string, $content is returned unchanged.
2273          *
2274          * If the given Content object is not of a type that can be edited using
2275          * the text base EditPage, an exception will be raised. Set
2276          * $this->allowNonTextContent to true to allow editing of non-textual
2277          * content.
2278          *
2279          * @param Content|null|bool|string $content
2280          * @return string The editable text form of the content.
2281          *
2282          * @throws MWException If $content is not an instance of TextContent and
2283          *   $this->allowNonTextContent is not true.
2284          */
2285         protected function toEditText( $content ) {
2286                 if ( $content === null || $content === false || is_string( $content ) ) {
2287                         return $content;
2288                 }
2289
2290                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2291                         throw new MWException( 'This content model is not supported: '
2292                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2293                 }
2294
2295                 return $content->serialize( $this->contentFormat );
2296         }
2297
2298         /**
2299          * Turns the given text into a Content object by unserializing it.
2300          *
2301          * If the resulting Content object is not of a type that can be edited using
2302          * the text base EditPage, an exception will be raised. Set
2303          * $this->allowNonTextContent to true to allow editing of non-textual
2304          * content.
2305          *
2306          * @param string|null|bool $text Text to unserialize
2307          * @return Content The content object created from $text. If $text was false
2308          *   or null, false resp. null will be  returned instead.
2309          *
2310          * @throws MWException If unserializing the text results in a Content
2311          *   object that is not an instance of TextContent and
2312          *   $this->allowNonTextContent is not true.
2313          */
2314         protected function toEditContent( $text ) {
2315                 if ( $text === false || $text === null ) {
2316                         return $text;
2317                 }
2318
2319                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2320                         $this->contentModel, $this->contentFormat );
2321
2322                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2323                         throw new MWException( 'This content model is not supported: '
2324                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2325                 }
2326
2327                 return $content;
2328         }
2329
2330         /**
2331          * Send the edit form and related headers to $wgOut
2332          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2333          *     during form output near the top, for captchas and the like.
2334          *
2335          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2336          * use the EditPage::showEditForm:fields hook instead.
2337          */
2338         function showEditForm( $formCallback = null ) {
2339                 global $wgOut, $wgUser;
2340
2341                 # need to parse the preview early so that we know which templates are used,
2342                 # otherwise users with "show preview after edit box" will get a blank list
2343                 # we parse this near the beginning so that setHeaders can do the title
2344                 # setting work instead of leaving it in getPreviewText
2345                 $previewOutput = '';
2346                 if ( $this->formtype == 'preview' ) {
2347                         $previewOutput = $this->getPreviewText();
2348                 }
2349
2350                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2351
2352                 $this->setHeaders();
2353
2354                 if ( $this->showHeader() === false ) {
2355                         return;
2356                 }
2357
2358                 $wgOut->addHTML( $this->editFormPageTop );
2359
2360                 if ( $wgUser->getOption( 'previewontop' ) ) {
2361                         $this->displayPreviewArea( $previewOutput, true );
2362                 }
2363
2364                 $wgOut->addHTML( $this->editFormTextTop );
2365
2366                 $showToolbar = true;
2367                 if ( $this->wasDeletedSinceLastEdit() ) {
2368                         if ( $this->formtype == 'save' ) {
2369                                 // Hide the toolbar and edit area, user can click preview to get it back
2370                                 // Add an confirmation checkbox and explanation.
2371                                 $showToolbar = false;
2372                         } else {
2373                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2374                                         'deletedwhileediting' );
2375                         }
2376                 }
2377
2378                 // @todo add EditForm plugin interface and use it here!
2379                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2380                 $wgOut->addHTML( Html::openElement(
2381                         'form',
2382                         array(
2383                                 'id' => self::EDITFORM_ID,
2384                                 'name' => self::EDITFORM_ID,
2385                                 'method' => 'post',
2386                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2387                                 'enctype' => 'multipart/form-data'
2388                         )
2389                 ) );
2390
2391                 if ( is_callable( $formCallback ) ) {
2392                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2393                         call_user_func_array( $formCallback, array( &$wgOut ) );
2394                 }
2395
2396                 // Add an empty field to trip up spambots
2397                 $wgOut->addHTML(
2398                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2399                         . Html::rawElement(
2400                                 'label',
2401                                 array( 'for' => 'wpAntiSpam' ),
2402                                 wfMessage( 'simpleantispam-label' )->parse()
2403                         )
2404                         . Xml::element(
2405                                 'input',
2406                                 array(
2407                                         'type' => 'text',
2408                                         'name' => 'wpAntispam',
2409                                         'id' => 'wpAntispam',
2410                                         'value' => ''
2411                                 )
2412                         )
2413                         . Xml::closeElement( 'div' )
2414                 );
2415
2416                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2417
2418                 // Put these up at the top to ensure they aren't lost on early form submission
2419                 $this->showFormBeforeText();
2420
2421                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2422                         $username = $this->lastDelete->user_name;
2423                         $comment = $this->lastDelete->log_comment;
2424
2425                         // It is better to not parse the comment at all than to have templates expanded in the middle
2426                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2427                         $key = $comment === ''
2428                                 ? 'confirmrecreate-noreason'
2429                                 : 'confirmrecreate';
2430                         $wgOut->addHTML(
2431                                 '<div class="mw-confirm-recreate">' .
2432                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2433                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2434                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2435                                 ) .
2436                                 '</div>'
2437                         );
2438                 }
2439
2440                 # When the summary is hidden, also hide them on preview/show changes
2441                 if ( $this->nosummary ) {
2442                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2443                 }
2444
2445                 # If a blank edit summary was previously provided, and the appropriate
2446                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2447                 # user being bounced back more than once in the event that a summary
2448                 # is not required.
2449                 #####
2450                 # For a bit more sophisticated detection of blank summaries, hash the
2451                 # automatic one and pass that in the hidden field wpAutoSummary.
2452                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2453                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2454                 }
2455
2456                 if ( $this->undidRev ) {
2457                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2458                 }
2459
2460                 if ( $this->selfRedirect ) {
2461                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2462                 }
2463
2464                 if ( $this->hasPresetSummary ) {
2465                         // If a summary has been preset using &summary= we don't want to prompt for
2466                         // a different summary. Only prompt for a summary if the summary is blanked.
2467                         // (Bug 17416)
2468                         $this->autoSumm = md5( '' );
2469                 }
2470
2471                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2472                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2473
2474                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2475                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2476                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2477
2478                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2479                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2480
2481                 if ( $this->section == 'new' ) {
2482                         $this->showSummaryInput( true, $this->summary );
2483                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2484                 }
2485
2486                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2487
2488                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2489                         $wgOut->addHTML( EditPage::getEditToolbar() );
2490                 }
2491
2492                 if ( $this->blankArticle ) {
2493                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2494                 }
2495
2496                 if ( $this->isConflict ) {
2497                         // In an edit conflict bypass the overridable content form method
2498                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2499                         // resolved between page source edits and custom ui edits using the
2500                         // custom edit ui.
2501                         $this->textbox2 = $this->textbox1;
2502
2503                         $content = $this->getCurrentContent();
2504                         $this->textbox1 = $this->toEditText( $content );
2505
2506                         $this->showTextbox1();
2507                 } else {
2508                         $this->showContentForm();
2509                 }
2510
2511                 $wgOut->addHTML( $this->editFormTextAfterContent );
2512
2513                 $this->showStandardInputs();
2514
2515                 $this->showFormAfterText();
2516
2517                 $this->showTosSummary();
2518
2519                 $this->showEditTools();
2520
2521                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2522
2523                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2524                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2525
2526                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2527                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2528
2529                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2530                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2531
2532                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2533
2534                 if ( $this->isConflict ) {
2535                         try {
2536                                 $this->showConflict();
2537                         } catch ( MWContentSerializationException $ex ) {
2538                                 // this can't really happen, but be nice if it does.
2539                                 $msg = wfMessage(
2540                                         'content-failed-to-parse',
2541                                         $this->contentModel,
2542                                         $this->contentFormat,
2543                                         $ex->getMessage()
2544                                 );
2545                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2546                         }
2547                 }
2548
2549                 // Marker for detecting truncated form data.  This must be the last
2550                 // parameter sent in order to be of use, so do not move me.
2551                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2552                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2553
2554                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2555                         $this->displayPreviewArea( $previewOutput, false );
2556                 }
2557
2558         }
2559
2560         /**
2561          * Extract the section title from current section text, if any.
2562          *
2563          * @param string $text
2564          * @return string|bool String or false
2565          */
2566         public static function extractSectionTitle( $text ) {
2567                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2568                 if ( !empty( $matches[2] ) ) {
2569                         global $wgParser;
2570                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2571                 } else {
2572                         return false;
2573                 }
2574         }
2575
2576         /**
2577          * @return bool
2578          */
2579         protected function showHeader() {
2580                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2581                 global $wgAllowUserCss, $wgAllowUserJs;
2582
2583                 if ( $this->mTitle->isTalkPage() ) {
2584                         $wgOut->addWikiMsg( 'talkpagetext' );
2585                 }
2586
2587                 // Add edit notices
2588                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
2589                 if ( count( $editNotices ) ) {
2590                         $wgOut->addHTML( implode( "\n", $editNotices ) );
2591                 } else {
2592                         $msg = wfMessage( 'editnotice-notext' );
2593                         if ( !$msg->isDisabled() ) {
2594                                 $wgOut->addHTML(
2595                                         '<div class="mw-editnotice-notext">'
2596                                         . $msg->parseAsBlock()
2597                                         . '</div>'
2598                                 );
2599                         }
2600                 }
2601
2602                 if ( $this->isConflict ) {
2603                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2604                         $this->edittime = $this->mArticle->getTimestamp();
2605                 } else {
2606                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2607                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2608                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2609                                 // Someone is welcome to try refactoring though
2610                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2611                                 return false;
2612                         }
2613
2614                         if ( $this->section != '' && $this->section != 'new' ) {
2615                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2616                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2617                                         if ( $sectionTitle !== false ) {
2618                                                 $this->summary = "/* $sectionTitle */ ";
2619                                         }
2620                                 }
2621                         }
2622
2623                         if ( $this->missingComment ) {
2624                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2625                         }
2626
2627                         if ( $this->missingSummary && $this->section != 'new' ) {
2628                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2629                         }
2630
2631                         if ( $this->missingSummary && $this->section == 'new' ) {
2632                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2633                         }
2634
2635                         if ( $this->blankArticle ) {
2636                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2637                         }
2638
2639                         if ( $this->selfRedirect ) {
2640                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2641                         }
2642
2643                         if ( $this->hookError !== '' ) {
2644                                 $wgOut->addWikiText( $this->hookError );
2645                         }
2646
2647                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2648                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2649                         }
2650
2651                         if ( $this->section != 'new' ) {
2652                                 $revision = $this->mArticle->getRevisionFetched();
2653                                 if ( $revision ) {
2654                                         // Let sysop know that this will make private content public if saved
2655
2656                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2657                                                 $wgOut->wrapWikiMsg(
2658                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2659                                                         'rev-deleted-text-permission'
2660                                                 );
2661                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2662                                                 $wgOut->wrapWikiMsg(
2663                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2664                                                         'rev-deleted-text-view'
2665                                                 );
2666                                         }
2667
2668                                         if ( !$revision->isCurrent() ) {
2669                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2670                                                 $wgOut->addWikiMsg( 'editingold' );
2671                                         }
2672                                 } elseif ( $this->mTitle->exists() ) {
2673                                         // Something went wrong
2674
2675                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2676                                                 array( 'missing-revision', $this->oldid ) );
2677                                 }
2678                         }
2679                 }
2680
2681                 if ( wfReadOnly() ) {
2682                         $wgOut->wrapWikiMsg(
2683                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2684                                 array( 'readonlywarning', wfReadOnlyReason() )
2685                         );
2686                 } elseif ( $wgUser->isAnon() ) {
2687                         if ( $this->formtype != 'preview' ) {
2688                                 $wgOut->wrapWikiMsg(
2689                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2690                                         array( 'anoneditwarning',
2691                                                 // Log-in link
2692                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2693                                                 // Sign-up link
2694                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2695                                 );
2696                         } else {
2697                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2698                                         'anonpreviewwarning'
2699                                 );
2700                         }
2701                 } else {
2702                         if ( $this->isCssJsSubpage ) {
2703                                 # Check the skin exists
2704                                 if ( $this->isWrongCaseCssJsPage ) {
2705                                         $wgOut->wrapWikiMsg(
2706                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2707                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2708                                         );
2709                                 }
2710                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2711                                         if ( $this->formtype !== 'preview' ) {
2712                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2713                                                         $wgOut->wrapWikiMsg(
2714                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2715                                                                 array( 'usercssyoucanpreview' )
2716                                                         );
2717                                                 }
2718
2719                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
2720                                                         $wgOut->wrapWikiMsg(
2721                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2722                                                                 array( 'userjsyoucanpreview' )
2723                                                         );
2724                                                 }
2725                                         }
2726                                 }
2727                         }
2728                 }
2729
2730                 if ( $this->mTitle->isProtected( 'edit' ) &&
2731                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2732                 ) {
2733                         # Is the title semi-protected?
2734                         if ( $this->mTitle->isSemiProtected() ) {
2735                                 $noticeMsg = 'semiprotectedpagewarning';
2736                         } else {
2737                                 # Then it must be protected based on static groups (regular)
2738                                 $noticeMsg = 'protectedpagewarning';
2739                         }
2740                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2741                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2742                 }
2743                 if ( $this->mTitle->isCascadeProtected() ) {
2744                         # Is this page under cascading protection from some source pages?
2745                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2746                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2747                         $cascadeSourcesCount = count( $cascadeSources );
2748                         if ( $cascadeSourcesCount > 0 ) {
2749                                 # Explain, and list the titles responsible
2750                                 foreach ( $cascadeSources as $page ) {
2751                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2752                                 }
2753                         }
2754                         $notice .= '</div>';
2755                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2756                 }
2757                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2758                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2759                                 array( 'lim' => 1,
2760                                         'showIfEmpty' => false,
2761                                         'msgKey' => array( 'titleprotectedwarning' ),
2762                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2763                 }
2764
2765                 if ( $this->kblength === false ) {
2766                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2767                 }
2768
2769                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2770                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2771                                 array(
2772                                         'longpageerror',
2773                                         $wgLang->formatNum( $this->kblength ),
2774                                         $wgLang->formatNum( $wgMaxArticleSize )
2775                                 )
2776                         );
2777                 } else {
2778                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2779                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2780                                         array(
2781                                                 'longpage-hint',
2782                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2783                                                 strlen( $this->textbox1 )
2784                                         )
2785                                 );
2786                         }
2787                 }
2788                 # Add header copyright warning
2789                 $this->showHeaderCopyrightWarning();
2790
2791                 return true;
2792         }
2793
2794         /**
2795          * Standard summary input and label (wgSummary), abstracted so EditPage
2796          * subclasses may reorganize the form.
2797          * Note that you do not need to worry about the label's for=, it will be
2798          * inferred by the id given to the input. You can remove them both by
2799          * passing array( 'id' => false ) to $userInputAttrs.
2800          *
2801          * @param string $summary The value of the summary input
2802          * @param string $labelText The html to place inside the label
2803          * @param array $inputAttrs Array of attrs to use on the input
2804          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2805          *
2806          * @return array An array in the format array( $label, $input )
2807          */
2808         function getSummaryInput( $summary = "", $labelText = null,
2809                 $inputAttrs = null, $spanLabelAttrs = null
2810         ) {
2811                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2812                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2813                         'id' => 'wpSummary',
2814                         'maxlength' => '200',
2815                         'tabindex' => '1',
2816                         'size' => 60,
2817                         'spellcheck' => 'true',
2818                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2819
2820                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2821                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2822                         'id' => "wpSummaryLabel"
2823                 );
2824
2825                 $label = null;
2826                 if ( $labelText ) {
2827                         $label = Xml::tags(
2828                                 'label',
2829                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2830                                 $labelText
2831                         );
2832                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2833                 }
2834
2835                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2836
2837                 return array( $label, $input );
2838         }
2839
2840         /**
2841          * @param bool $isSubjectPreview True if this is the section subject/title
2842          *   up top, or false if this is the comment summary
2843          *   down below the textarea
2844          * @param string $summary The text of the summary to display
2845          */
2846         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2847                 global $wgOut, $wgContLang;
2848                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2849                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2850                 if ( $isSubjectPreview ) {
2851                         if ( $this->nosummary ) {
2852                                 return;
2853                         }
2854                 } else {
2855                         if ( !$this->mShowSummaryField ) {
2856                                 return;
2857                         }
2858                 }
2859                 $summary = $wgContLang->recodeForEdit( $summary );
2860                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2861                 list( $label, $input ) = $this->getSummaryInput(
2862                         $summary,
2863                         $labelText,
2864                         array( 'class' => $summaryClass ),
2865                         array()
2866                 );
2867                 $wgOut->addHTML( "{$label} {$input}" );
2868         }
2869
2870         /**
2871          * @param bool $isSubjectPreview True if this is the section subject/title
2872          *   up top, or false if this is the comment summary
2873          *   down below the textarea
2874          * @param string $summary The text of the summary to display
2875          * @return string
2876          */
2877         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2878                 // avoid spaces in preview, gets always trimmed on save
2879                 $summary = trim( $summary );
2880                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2881                         return "";
2882                 }
2883
2884                 global $wgParser;
2885
2886                 if ( $isSubjectPreview ) {
2887                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2888                                 ->inContentLanguage()->text();
2889                 }
2890
2891                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2892
2893                 $summary = wfMessage( $message )->parse()
2894                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2895                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2896         }
2897
2898         protected function showFormBeforeText() {
2899                 global $wgOut;
2900                 $section = htmlspecialchars( $this->section );
2901                 $wgOut->addHTML( <<<HTML
2902 <input type='hidden' value="{$section}" name="wpSection"/>
2903 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2904 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2905 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2906
2907 HTML
2908                 );
2909                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2910                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2911                 }
2912         }
2913
2914         protected function showFormAfterText() {
2915                 global $wgOut, $wgUser;
2916                 /**
2917                  * To make it harder for someone to slip a user a page
2918                  * which submits an edit form to the wiki without their
2919                  * knowledge, a random token is associated with the login
2920                  * session. If it's not passed back with the submission,
2921                  * we won't save the page, or render user JavaScript and
2922                  * CSS previews.
2923                  *
2924                  * For anon editors, who may not have a session, we just
2925                  * include the constant suffix to prevent editing from
2926                  * broken text-mangling proxies.
2927                  */
2928                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2929         }
2930
2931         /**
2932          * Subpage overridable method for printing the form for page content editing
2933          * By default this simply outputs wpTextbox1
2934          * Subclasses can override this to provide a custom UI for editing;
2935          * be it a form, or simply wpTextbox1 with a modified content that will be
2936          * reverse modified when extracted from the post data.
2937          * Note that this is basically the inverse for importContentFormData
2938          */
2939         protected function showContentForm() {
2940                 $this->showTextbox1();
2941         }
2942
2943         /**
2944          * Method to output wpTextbox1
2945          * The $textoverride method can be used by subclasses overriding showContentForm
2946          * to pass back to this method.
2947          *
2948          * @param array $customAttribs Array of html attributes to use in the textarea
2949          * @param string $textoverride Optional text to override $this->textarea1 with
2950          */
2951         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2952                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2953                         $attribs = array( 'style' => 'display:none;' );
2954                 } else {
2955                         $classes = array(); // Textarea CSS
2956                         if ( $this->mTitle->isProtected( 'edit' ) &&
2957                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2958                         ) {
2959                                 # Is the title semi-protected?
2960                                 if ( $this->mTitle->isSemiProtected() ) {
2961                                         $classes[] = 'mw-textarea-sprotected';
2962                                 } else {
2963                                         # Then it must be protected based on static groups (regular)
2964                                         $classes[] = 'mw-textarea-protected';
2965                                 }
2966                                 # Is the title cascade-protected?
2967                                 if ( $this->mTitle->isCascadeProtected() ) {
2968                                         $classes[] = 'mw-textarea-cprotected';
2969                                 }
2970                         }
2971
2972                         $attribs = array( 'tabindex' => 1 );
2973
2974                         if ( is_array( $customAttribs ) ) {
2975                                 $attribs += $customAttribs;
2976                         }
2977
2978                         if ( count( $classes ) ) {
2979                                 if ( isset( $attribs['class'] ) ) {
2980                                         $classes[] = $attribs['class'];
2981                                 }
2982                                 $attribs['class'] = implode( ' ', $classes );
2983                         }
2984                 }
2985
2986                 $this->showTextbox(
2987                         $textoverride !== null ? $textoverride : $this->textbox1,
2988                         'wpTextbox1',
2989                         $attribs
2990                 );
2991         }
2992
2993         protected function showTextbox2() {
2994                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2995         }
2996
2997         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2998                 global $wgOut, $wgUser;
2999
3000                 $wikitext = $this->safeUnicodeOutput( $text );
3001                 if ( strval( $wikitext ) !== '' ) {
3002                         // Ensure there's a newline at the end, otherwise adding lines
3003                         // is awkward.
3004                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3005                         // mode will show an extra newline. A bit annoying.
3006                         $wikitext .= "\n";
3007                 }
3008
3009                 $attribs = $customAttribs + array(
3010                         'accesskey' => ',',
3011                         'id' => $name,
3012                         'cols' => $wgUser->getIntOption( 'cols' ),
3013                         'rows' => $wgUser->getIntOption( 'rows' ),
3014                         // Avoid PHP notices when appending preferences
3015                         // (appending allows customAttribs['style'] to still work).
3016                         'style' => ''
3017                 );
3018
3019                 $pageLang = $this->mTitle->getPageLanguage();
3020                 $attribs['lang'] = $pageLang->getHtmlCode();
3021                 $attribs['dir'] = $pageLang->getDir();
3022
3023                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3024         }
3025
3026         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3027                 global $wgOut;
3028                 $classes = array();
3029                 if ( $isOnTop ) {
3030                         $classes[] = 'ontop';
3031                 }
3032
3033                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3034
3035                 if ( $this->formtype != 'preview' ) {
3036                         $attribs['style'] = 'display: none;';
3037                 }
3038
3039                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3040
3041                 if ( $this->formtype == 'preview' ) {
3042                         $this->showPreview( $previewOutput );
3043                 } else {
3044                         // Empty content container for LivePreview
3045                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3046                         $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3047                                 'class' => 'mw-content-' . $pageViewLang->getDir() );
3048                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3049                 }
3050
3051                 $wgOut->addHTML( '</div>' );
3052
3053                 if ( $this->formtype == 'diff' ) {
3054                         try {
3055                                 $this->showDiff();
3056                         } catch ( MWContentSerializationException $ex ) {
3057                                 $msg = wfMessage(
3058                                         'content-failed-to-parse',
3059                                         $this->contentModel,
3060                                         $this->contentFormat,
3061                                         $ex->getMessage()
3062                                 );
3063                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3064                         }
3065                 }
3066         }
3067
3068         /**
3069          * Append preview output to $wgOut.
3070          * Includes category rendering if this is a category page.
3071          *
3072          * @param string $text The HTML to be output for the preview.
3073          */
3074         protected function showPreview( $text ) {
3075                 global $wgOut;
3076                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3077                         $this->mArticle->openShowCategory();
3078                 }
3079                 # This hook seems slightly odd here, but makes things more
3080                 # consistent for extensions.
3081                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3082                 $wgOut->addHTML( $text );
3083                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3084                         $this->mArticle->closeShowCategory();
3085                 }
3086         }
3087
3088         /**
3089          * Get a diff between the current contents of the edit box and the
3090          * version of the page we're editing from.
3091          *
3092          * If this is a section edit, we'll replace the section as for final
3093          * save and then make a comparison.
3094          */
3095         function showDiff() {
3096                 global $wgUser, $wgContLang, $wgOut;
3097
3098                 $oldtitlemsg = 'currentrev';
3099                 # if message does not exist, show diff against the preloaded default
3100                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3101                         $oldtext = $this->mTitle->getDefaultMessageText();
3102                         if ( $oldtext !== false ) {
3103                                 $oldtitlemsg = 'defaultmessagetext';
3104                                 $oldContent = $this->toEditContent( $oldtext );
3105                         } else {
3106                                 $oldContent = null;
3107                         }
3108                 } else {
3109                         $oldContent = $this->getCurrentContent();
3110                 }
3111
3112                 $textboxContent = $this->toEditContent( $this->textbox1 );
3113
3114                 $newContent = $this->mArticle->replaceSectionContent(
3115                                                         $this->section, $textboxContent,
3116                                                         $this->summary, $this->edittime );
3117
3118                 if ( $newContent ) {
3119                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3120                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3121
3122                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3123                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3124                 }
3125
3126                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3127                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3128                         $newtitle = wfMessage( 'yourtext' )->parse();
3129
3130                         if ( !$oldContent ) {
3131                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3132                         }
3133
3134                         if ( !$newContent ) {
3135                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3136                         }
3137
3138                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3139                         $de->setContent( $oldContent, $newContent );
3140
3141                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3142                         $de->showDiffStyle();
3143                 } else {
3144                         $difftext = '';
3145                 }
3146
3147                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3148         }
3149
3150         /**
3151          * Show the header copyright warning.
3152          */
3153         protected function showHeaderCopyrightWarning() {
3154                 $msg = 'editpage-head-copy-warn';
3155                 if ( !wfMessage( $msg )->isDisabled() ) {
3156                         global $wgOut;
3157                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3158                                 'editpage-head-copy-warn' );
3159                 }
3160         }
3161
3162         /**
3163          * Give a chance for site and per-namespace customizations of
3164          * terms of service summary link that might exist separately
3165          * from the copyright notice.
3166          *
3167          * This will display between the save button and the edit tools,
3168          * so should remain short!
3169          */
3170         protected function showTosSummary() {
3171                 $msg = 'editpage-tos-summary';
3172                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3173                 if ( !wfMessage( $msg )->isDisabled() ) {
3174                         global $wgOut;
3175                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3176                         $wgOut->addWikiMsg( $msg );
3177                         $wgOut->addHTML( '</div>' );
3178                 }
3179         }
3180
3181         protected function showEditTools() {
3182                 global $wgOut;
3183                 $wgOut->addHTML( '<div class="mw-editTools">' .
3184                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3185                         '</div>' );
3186         }
3187
3188         /**
3189          * Get the copyright warning
3190          *
3191          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3192          * @return string
3193          */
3194         protected function getCopywarn() {
3195                 return self::getCopyrightWarning( $this->mTitle );
3196         }
3197
3198         /**
3199          * Get the copyright warning, by default returns wikitext
3200          *
3201          * @param Title $title
3202          * @param string $format Output format, valid values are any function of a Message object
3203          * @return string
3204          */
3205         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3206                 global $wgRightsText;
3207                 if ( $wgRightsText ) {
3208                         $copywarnMsg = array( 'copyrightwarning',
3209                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3210                                 $wgRightsText );
3211                 } else {
3212                         $copywarnMsg = array( 'copyrightwarning2',
3213                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3214                 }
3215                 // Allow for site and per-namespace customization of contribution/copyright notice.
3216                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3217
3218                 return "<div id=\"editpage-copywarn\">\n" .
3219                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3220         }
3221
3222         /**
3223          * Get the Limit report for page previews
3224          *
3225          * @since 1.22
3226          * @param ParserOutput $output ParserOutput object from the parse
3227          * @return string HTML
3228          */
3229         public static function getPreviewLimitReport( $output ) {
3230                 if ( !$output || !$output->getLimitReportData() ) {
3231                         return '';
3232                 }
3233
3234                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3235                         wfMessage( 'limitreport-title' )->parseAsBlock()
3236                 );
3237
3238                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3239                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3240
3241                 $limitReport .= Html::openElement( 'table', array(
3242                         'class' => 'preview-limit-report wikitable'
3243                 ) ) .
3244                         Html::openElement( 'tbody' );
3245
3246                 foreach ( $output->getLimitReportData() as $key => $value ) {
3247                         if ( Hooks::run( 'ParserLimitReportFormat',
3248                                 array( $key, &$value, &$limitReport, true, true )
3249                         ) ) {
3250                                 $keyMsg = wfMessage( $key );
3251                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3252                                 if ( !$valueMsg->exists() ) {
3253                                         $valueMsg = new RawMessage( '$1' );
3254                                 }
3255                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3256                                         $limitReport .= Html::openElement( 'tr' ) .
3257                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3258                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3259                                                 Html::closeElement( 'tr' );
3260                                 }
3261                         }
3262                 }
3263
3264                 $limitReport .= Html::closeElement( 'tbody' ) .
3265                         Html::closeElement( 'table' ) .
3266                         Html::closeElement( 'div' );
3267
3268                 return $limitReport;
3269         }
3270
3271         protected function showStandardInputs( &$tabindex = 2 ) {
3272                 global $wgOut;
3273                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3274
3275                 if ( $this->section != 'new' ) {
3276                         $this->showSummaryInput( false, $this->summary );
3277                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3278                 }
3279
3280                 $checkboxes = $this->getCheckboxes( $tabindex,
3281                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3282                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3283
3284                 // Show copyright warning.
3285                 $wgOut->addWikiText( $this->getCopywarn() );
3286                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3287
3288                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3289                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3290
3291                 $cancel = $this->getCancelLink();
3292                 if ( $cancel !== '' ) {
3293                         $cancel .= Html::element( 'span',
3294                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3295                                 wfMessage( 'pipe-separator' )->text() );
3296                 }
3297
3298                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3299                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3300                 $attrs = array(
3301                         'target' => 'helpwindow',
3302                         'href' => $edithelpurl,
3303                 );
3304                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3305                         $attrs, array( 'mw-ui-quiet' ) ) .
3306                         wfMessage( 'word-separator' )->escaped() .
3307                         wfMessage( 'newwindow' )->parse();
3308
3309                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3310                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3311                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3312
3313                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3314
3315                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3316         }
3317
3318         /**
3319          * Show an edit conflict. textbox1 is already shown in showEditForm().
3320          * If you want to use another entry point to this function, be careful.
3321          */
3322         protected function showConflict() {
3323                 global $wgOut;
3324
3325                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3326                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3327
3328                         $content1 = $this->toEditContent( $this->textbox1 );
3329                         $content2 = $this->toEditContent( $this->textbox2 );
3330
3331                         $handler = ContentHandler::getForModelID( $this->contentModel );
3332                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3333                         $de->setContent( $content2, $content1 );
3334                         $de->showDiff(
3335                                 wfMessage( 'yourtext' )->parse(),
3336                                 wfMessage( 'storedversion' )->text()
3337                         );
3338
3339                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3340                         $this->showTextbox2();
3341                 }
3342         }
3343
3344         /**
3345          * @return string
3346          */
3347         public function getCancelLink() {
3348                 $cancelParams = array();
3349                 if ( !$this->isConflict && $this->oldid > 0 ) {
3350                         $cancelParams['oldid'] = $this->oldid;
3351                 }
3352                 $attrs = array( 'id' => 'mw-editform-cancel' );
3353
3354                 return Linker::linkKnown(
3355                         $this->getContextTitle(),
3356                         wfMessage( 'cancel' )->parse(),
3357                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3358                         $cancelParams
3359                 );
3360         }
3361
3362         /**
3363          * Returns the URL to use in the form's action attribute.
3364          * This is used by EditPage subclasses when simply customizing the action
3365          * variable in the constructor is not enough. This can be used when the
3366          * EditPage lives inside of a Special page rather than a custom page action.
3367          *
3368          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3369          * @return string
3370          */
3371         protected function getActionURL( Title $title ) {
3372                 return $title->getLocalURL( array( 'action' => $this->action ) );
3373         }
3374
3375         /**
3376          * Check if a page was deleted while the user was editing it, before submit.
3377          * Note that we rely on the logging table, which hasn't been always there,
3378          * but that doesn't matter, because this only applies to brand new
3379          * deletes.
3380          * @return bool
3381          */
3382         protected function wasDeletedSinceLastEdit() {
3383                 if ( $this->deletedSinceEdit !== null ) {
3384                         return $this->deletedSinceEdit;
3385                 }
3386
3387                 $this->deletedSinceEdit = false;
3388
3389                 if ( $this->mTitle->isDeletedQuick() ) {
3390                         $this->lastDelete = $this->getLastDelete();
3391                         if ( $this->lastDelete ) {
3392                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3393                                 if ( $deleteTime > $this->starttime ) {
3394                                         $this->deletedSinceEdit = true;
3395                                 }
3396                         }
3397                 }
3398
3399                 return $this->deletedSinceEdit;
3400         }
3401
3402         /**
3403          * @return bool|stdClass
3404          */
3405         protected function getLastDelete() {
3406                 $dbr = wfGetDB( DB_SLAVE );
3407                 $data = $dbr->selectRow(
3408                         array( 'logging', 'user' ),
3409                         array(
3410                                 'log_type',
3411                                 'log_action',
3412                                 'log_timestamp',
3413                                 'log_user',
3414                                 'log_namespace',
3415                                 'log_title',
3416                                 'log_comment',
3417                                 'log_params',
3418                                 'log_deleted',
3419                                 'user_name'
3420                         ), array(
3421                                 'log_namespace' => $this->mTitle->getNamespace(),
3422                                 'log_title' => $this->mTitle->getDBkey(),
3423                                 'log_type' => 'delete',
3424                                 'log_action' => 'delete',
3425                                 'user_id=log_user'
3426                         ),
3427                         __METHOD__,
3428                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3429                 );
3430                 // Quick paranoid permission checks...
3431                 if ( is_object( $data ) ) {
3432                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3433                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3434                         }
3435
3436                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3437                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3438                         }
3439                 }
3440
3441                 return $data;
3442         }
3443
3444         /**
3445          * Get the rendered text for previewing.
3446          * @throws MWException
3447          * @return string
3448          */
3449         function getPreviewText() {
3450                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3451                 global $wgAllowUserCss, $wgAllowUserJs;
3452
3453                 if ( $wgRawHtml && !$this->mTokenOk ) {
3454                         // Could be an offsite preview attempt. This is very unsafe if
3455                         // HTML is enabled, as it could be an attack.
3456                         $parsedNote = '';
3457                         if ( $this->textbox1 !== '' ) {
3458                                 // Do not put big scary notice, if previewing the empty
3459                                 // string, which happens when you initially edit
3460                                 // a category page, due to automatic preview-on-open.
3461                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3462                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3463                         }
3464                         return $parsedNote;
3465                 }
3466
3467                 $note = '';
3468
3469                 try {
3470                         $content = $this->toEditContent( $this->textbox1 );
3471
3472                         $previewHTML = '';
3473                         if ( !Hooks::run(
3474                                 'AlternateEditPreview',
3475                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3476                         ) {
3477                                 return $previewHTML;
3478                         }
3479
3480                         # provide a anchor link to the editform
3481                         $continueEditing = '<span class="mw-continue-editing">' .
3482                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3483                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3484                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3485                                 if ( $this->mTokenOkExceptSuffix ) {
3486                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3487                                 } else {
3488                                         $note = wfMessage( 'session_fail_preview' )->plain();
3489                                 }
3490                         } elseif ( $this->incompleteForm ) {
3491                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3492                         } else {
3493                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3494                         }
3495
3496                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3497                         $parserOptions->setIsPreview( true );
3498                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3499
3500                         # don't parse non-wikitext pages, show message about preview
3501                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3502                                 if ( $this->mTitle->isCssJsSubpage() ) {
3503                                         $level = 'user';
3504                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3505                                         $level = 'site';
3506                                 } else {
3507                                         $level = false;
3508                                 }
3509
3510                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3511                                         $format = 'css';
3512                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3513                                                 $format = false;
3514                                         }
3515                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3516                                         $format = 'js';
3517                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3518                                                 $format = false;
3519                                         }
3520                                 } else {
3521                                         $format = false;
3522                                 }
3523
3524                                 # Used messages to make sure grep find them:
3525                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3526                                 if ( $level && $format ) {
3527                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3528                                                 wfMessage( "{$level}{$format}preview" )->text() .
3529                                                 ' ' . $continueEditing . "</div>";
3530                                 }
3531                         }
3532
3533                         # If we're adding a comment, we need to show the
3534                         # summary as the headline
3535                         if ( $this->section === "new" && $this->summary !== "" ) {
3536                                 $content = $content->addSectionHeader( $this->summary );
3537                         }
3538
3539                         $hook_args = array( $this, &$content );
3540                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3541                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3542
3543                         $parserOptions->enableLimitReport();
3544
3545                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3546                         # But it's now deprecated, so never mind
3547
3548                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3549                         $scopedCallback = $parserOptions->setupFakeRevision(
3550                                 $this->mTitle, $pstContent, $wgUser );
3551                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3552
3553                         # Try to stash the edit for the final submission step
3554                         # @todo: different date format preferences cause cache misses
3555                         ApiStashEdit::stashEditFromPreview(
3556                                 $this->getArticle(), $content, $pstContent,
3557                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3558                         );
3559
3560                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3561                         $previewHTML = $parserOutput->getText();
3562                         $this->mParserOutput = $parserOutput;
3563                         $wgOut->addParserOutputMetadata( $parserOutput );
3564
3565                         if ( count( $parserOutput->getWarnings() ) ) {
3566                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3567                         }
3568                 } catch ( MWContentSerializationException $ex ) {
3569                         $m = wfMessage(
3570                                 'content-failed-to-parse',
3571                                 $this->contentModel,
3572                                 $this->contentFormat,
3573                                 $ex->getMessage()
3574                         );
3575                         $note .= "\n\n" . $m->parse();
3576                         $previewHTML = '';
3577                 }
3578
3579                 if ( $this->isConflict ) {
3580                         $conflict = '<h2 id="mw-previewconflict">'
3581                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3582                 } else {
3583                         $conflict = '<hr />';
3584                 }
3585
3586                 $previewhead = "<div class='previewnote'>\n" .
3587                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3588                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3589
3590                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3591                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3592                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3593                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3594
3595                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3596         }
3597
3598         /**
3599          * @return array
3600          */
3601         function getTemplates() {
3602                 if ( $this->preview || $this->section != '' ) {
3603                         $templates = array();
3604                         if ( !isset( $this->mParserOutput ) ) {
3605                                 return $templates;
3606                         }
3607                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3608                                 foreach ( array_keys( $template ) as $dbk ) {
3609                                         $templates[] = Title::makeTitle( $ns, $dbk );
3610                                 }
3611                         }
3612                         return $templates;
3613                 } else {
3614                         return $this->mTitle->getTemplateLinksFrom();
3615                 }
3616         }
3617
3618         /**
3619          * Shows a bulletin board style toolbar for common editing functions.
3620          * It can be disabled in the user preferences.
3621          *
3622          * @return string
3623          */
3624         static function getEditToolbar() {
3625                 global $wgContLang, $wgOut;
3626                 global $wgEnableUploads, $wgForeignFileRepos;
3627
3628                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3629
3630                 /**
3631                  * $toolarray is an array of arrays each of which includes the
3632                  * opening tag, the closing tag, optionally a sample text that is
3633                  * inserted between the two when no selection is highlighted
3634                  * and.  The tip text is shown when the user moves the mouse
3635                  * over the button.
3636                  *
3637                  * Images are defined in ResourceLoaderEditToolbarModule.
3638                  */
3639                 $toolarray = array(
3640                         array(
3641                                 'id'     => 'mw-editbutton-bold',
3642                                 'open'   => '\'\'\'',
3643                                 'close'  => '\'\'\'',
3644                                 'sample' => wfMessage( 'bold_sample' )->text(),
3645                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3646                         ),
3647                         array(
3648                                 'id'     => 'mw-editbutton-italic',
3649                                 'open'   => '\'\'',
3650                                 'close'  => '\'\'',
3651                                 'sample' => wfMessage( 'italic_sample' )->text(),
3652                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3653                         ),
3654                         array(
3655                                 'id'     => 'mw-editbutton-link',
3656                                 'open'   => '[[',
3657                                 'close'  => ']]',
3658                                 'sample' => wfMessage( 'link_sample' )->text(),
3659                                 'tip'    => wfMessage( 'link_tip' )->text(),
3660                         ),
3661                         array(
3662                                 'id'     => 'mw-editbutton-extlink',
3663                                 'open'   => '[',
3664                                 'close'  => ']',
3665                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3666                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3667                         ),
3668                         array(
3669                                 'id'     => 'mw-editbutton-headline',
3670                                 'open'   => "\n== ",
3671                                 'close'  => " ==\n",
3672                                 'sample' => wfMessage( 'headline_sample' )->text(),
3673                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3674                         ),
3675                         $imagesAvailable ? array(
3676                                 'id'     => 'mw-editbutton-image',
3677                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3678                                 'close'  => ']]',
3679                                 'sample' => wfMessage( 'image_sample' )->text(),
3680                                 'tip'    => wfMessage( 'image_tip' )->text(),
3681                         ) : false,
3682                         $imagesAvailable ? array(
3683                                 'id'     => 'mw-editbutton-media',
3684                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3685                                 'close'  => ']]',
3686                                 'sample' => wfMessage( 'media_sample' )->text(),
3687                                 'tip'    => wfMessage( 'media_tip' )->text(),
3688                         ) : false,
3689                         array(
3690                                 'id'     => 'mw-editbutton-nowiki',
3691                                 'open'   => "<nowiki>",
3692                                 'close'  => "</nowiki>",
3693                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3694                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3695                         ),
3696                         array(
3697                                 'id'     => 'mw-editbutton-signature',
3698                                 'open'   => '--~~~~',
3699                                 'close'  => '',
3700                                 'sample' => '',
3701                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3702                         ),
3703                         array(
3704                                 'id'     => 'mw-editbutton-hr',
3705                                 'open'   => "\n----\n",
3706                                 'close'  => '',
3707                                 'sample' => '',
3708                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3709                         )
3710                 );
3711
3712                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3713                 foreach ( $toolarray as $tool ) {
3714                         if ( !$tool ) {
3715                                 continue;
3716                         }
3717
3718                         $params = array(
3719                                 // Images are defined in ResourceLoaderEditToolbarModule
3720                                 false,
3721                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3722                                 // Older browsers show a "speedtip" type message only for ALT.
3723                                 // Ideally these should be different, realistically they
3724                                 // probably don't need to be.
3725                                 $tool['tip'],
3726                                 $tool['open'],
3727                                 $tool['close'],
3728                                 $tool['sample'],
3729                                 $tool['id'],
3730                         );
3731
3732                         $script .= Xml::encodeJsCall(
3733                                 'mw.toolbar.addButton',
3734                                 $params,
3735                                 ResourceLoader::inDebugMode()
3736                         );
3737                 }
3738
3739                 $script .= '});';
3740                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3741
3742                 $toolbar = '<div id="toolbar"></div>';
3743
3744                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3745
3746                 return $toolbar;
3747         }
3748
3749         /**
3750          * Returns an array of html code of the following checkboxes:
3751          * minor and watch
3752          *
3753          * @param int $tabindex Current tabindex
3754          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3755          *                 status of the checkbox
3756          *
3757          * @return array
3758          */
3759         public function getCheckboxes( &$tabindex, $checked ) {
3760                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3761
3762                 $checkboxes = array();
3763
3764                 // don't show the minor edit checkbox if it's a new page or section
3765                 if ( !$this->isNew ) {
3766                         $checkboxes['minor'] = '';
3767                         $minorLabel = wfMessage( 'minoredit' )->parse();
3768                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3769                                 $attribs = array(
3770                                         'tabindex' => ++$tabindex,
3771                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3772                                         'id' => 'wpMinoredit',
3773                                 );
3774                                 $minorEditHtml =
3775                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3776                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3777                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3778                                         ">{$minorLabel}</label>";
3779
3780                                 if ( $wgUseMediaWikiUIEverywhere ) {
3781                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3782                                                 $minorEditHtml .
3783                                         Html::closeElement( 'div' );
3784                                 } else {
3785                                         $checkboxes['minor'] = $minorEditHtml;
3786                                 }
3787                         }
3788                 }
3789
3790                 $watchLabel = wfMessage( 'watchthis' )->parse();
3791                 $checkboxes['watch'] = '';
3792                 if ( $wgUser->isLoggedIn() ) {
3793                         $attribs = array(
3794                                 'tabindex' => ++$tabindex,
3795                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3796                                 'id' => 'wpWatchthis',
3797                         );
3798                         $watchThisHtml =
3799                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3800                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3801                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3802                                 ">{$watchLabel}</label>";
3803                         if ( $wgUseMediaWikiUIEverywhere ) {
3804                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3805                                         $watchThisHtml .
3806                                         Html::closeElement( 'div' );
3807                         } else {
3808                                 $checkboxes['watch'] = $watchThisHtml;
3809                         }
3810                 }
3811                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3812                 return $checkboxes;
3813         }
3814
3815         /**
3816          * Returns an array of html code of the following buttons:
3817          * save, diff, preview and live
3818          *
3819          * @param int $tabindex Current tabindex
3820          *
3821          * @return array
3822          */
3823         public function getEditButtons( &$tabindex ) {
3824                 $buttons = array();
3825
3826                 $attribs = array(
3827                         'id' => 'wpSave',
3828                         'name' => 'wpSave',
3829                         'tabindex' => ++$tabindex,
3830                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3831                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3832                         $attribs, array( 'mw-ui-constructive' ) );
3833
3834                 ++$tabindex; // use the same for preview and live preview
3835                 $attribs = array(
3836                         'id' => 'wpPreview',
3837                         'name' => 'wpPreview',
3838                         'tabindex' => $tabindex,
3839                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3840                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3841                         $attribs );
3842                 $buttons['live'] = '';
3843
3844                 $attribs = array(
3845                         'id' => 'wpDiff',
3846                         'name' => 'wpDiff',
3847                         'tabindex' => ++$tabindex,
3848                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3849                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3850                         $attribs );
3851
3852                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3853                 return $buttons;
3854         }
3855
3856         /**
3857          * Creates a basic error page which informs the user that
3858          * they have attempted to edit a nonexistent section.
3859          */
3860         function noSuchSectionPage() {
3861                 global $wgOut;
3862
3863                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3864
3865                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3866                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3867                 $wgOut->addHTML( $res );
3868
3869                 $wgOut->returnToMain( false, $this->mTitle );
3870         }
3871
3872         /**
3873          * Show "your edit contains spam" page with your diff and text
3874          *
3875          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3876          */
3877         public function spamPageWithContent( $match = false ) {
3878                 global $wgOut, $wgLang;
3879                 $this->textbox2 = $this->textbox1;
3880
3881                 if ( is_array( $match ) ) {
3882                         $match = $wgLang->listToText( $match );
3883                 }
3884                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3885
3886                 $wgOut->addHTML( '<div id="spamprotected">' );
3887                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3888                 if ( $match ) {
3889                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3890                 }
3891                 $wgOut->addHTML( '</div>' );
3892
3893                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3894                 $this->showDiff();
3895
3896                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3897                 $this->showTextbox2();
3898
3899                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3900         }
3901
3902         /**
3903          * Check if the browser is on a blacklist of user-agents known to
3904          * mangle UTF-8 data on form submission. Returns true if Unicode
3905          * should make it through, false if it's known to be a problem.
3906          * @return bool
3907          */
3908         private function checkUnicodeCompliantBrowser() {
3909                 global $wgBrowserBlackList, $wgRequest;
3910
3911                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3912                 if ( $currentbrowser === false ) {
3913                         // No User-Agent header sent? Trust it by default...
3914                         return true;
3915                 }
3916
3917                 foreach ( $wgBrowserBlackList as $browser ) {
3918                         if ( preg_match( $browser, $currentbrowser ) ) {
3919                                 return false;
3920                         }
3921                 }
3922                 return true;
3923         }
3924
3925         /**
3926          * Filter an input field through a Unicode de-armoring process if it
3927          * came from an old browser with known broken Unicode editing issues.
3928          *
3929          * @param WebRequest $request
3930          * @param string $field
3931          * @return string
3932          */
3933         protected function safeUnicodeInput( $request, $field ) {
3934                 $text = rtrim( $request->getText( $field ) );
3935                 return $request->getBool( 'safemode' )
3936                         ? $this->unmakeSafe( $text )
3937                         : $text;
3938         }
3939
3940         /**
3941          * Filter an output field through a Unicode armoring process if it is
3942          * going to an old browser with known broken Unicode editing issues.
3943          *
3944          * @param string $text
3945          * @return string
3946          */
3947         protected function safeUnicodeOutput( $text ) {
3948                 global $wgContLang;
3949                 $codedText = $wgContLang->recodeForEdit( $text );
3950                 return $this->checkUnicodeCompliantBrowser()
3951                         ? $codedText
3952                         : $this->makeSafe( $codedText );
3953         }
3954
3955         /**
3956          * A number of web browsers are known to corrupt non-ASCII characters
3957          * in a UTF-8 text editing environment. To protect against this,
3958          * detected browsers will be served an armored version of the text,
3959          * with non-ASCII chars converted to numeric HTML character references.
3960          *
3961          * Preexisting such character references will have a 0 added to them
3962          * to ensure that round-trips do not alter the original data.
3963          *
3964          * @param string $invalue
3965          * @return string
3966          */
3967         private function makeSafe( $invalue ) {
3968                 // Armor existing references for reversibility.
3969                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3970
3971                 $bytesleft = 0;
3972                 $result = "";
3973                 $working = 0;
3974                 $valueLength = strlen( $invalue );
3975                 for ( $i = 0; $i < $valueLength; $i++ ) {
3976                         $bytevalue = ord( $invalue[$i] );
3977                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3978                                 $result .= chr( $bytevalue );
3979                                 $bytesleft = 0;
3980                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3981                                 $working = $working << 6;
3982                                 $working += ( $bytevalue & 0x3F );
3983                                 $bytesleft--;
3984                                 if ( $bytesleft <= 0 ) {
3985                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3986                                 }
3987                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3988                                 $working = $bytevalue & 0x1F;
3989                                 $bytesleft = 1;
3990                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3991                                 $working = $bytevalue & 0x0F;
3992                                 $bytesleft = 2;
3993                         } else { // 1111 0xxx
3994                                 $working = $bytevalue & 0x07;
3995                                 $bytesleft = 3;
3996                         }
3997                 }
3998                 return $result;
3999         }
4000
4001         /**
4002          * Reverse the previously applied transliteration of non-ASCII characters
4003          * back to UTF-8. Used to protect data from corruption by broken web browsers
4004          * as listed in $wgBrowserBlackList.
4005          *
4006          * @param string $invalue
4007          * @return string
4008          */
4009         private function unmakeSafe( $invalue ) {
4010                 $result = "";
4011                 $valueLength = strlen( $invalue );
4012                 for ( $i = 0; $i < $valueLength; $i++ ) {
4013                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4014                                 $i += 3;
4015                                 $hexstring = "";
4016                                 do {
4017                                         $hexstring .= $invalue[$i];
4018                                         $i++;
4019                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4020
4021                                 // Do some sanity checks. These aren't needed for reversibility,
4022                                 // but should help keep the breakage down if the editor
4023                                 // breaks one of the entities whilst editing.
4024                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4025                                         $codepoint = hexdec( $hexstring );
4026                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4027                                 } else {
4028                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4029                                 }
4030                         } else {
4031                                 $result .= substr( $invalue, $i, 1 );
4032                         }
4033                 }
4034                 // reverse the transform that we made for reversibility reasons.
4035                 return strtr( $result, array( "&#x0" => "&#x" ) );
4036         }
4037 }