includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: user tried to modify the content model, but is not allowed to do that
 149          * ( User::isAllowed('editcontentmodel') == false )
 150          */
 151         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 152
 153         /**
 154          * Status: user tried to create self-redirect (redirect to the same article) and
 155          * wpIgnoreSelfRedirect == false
 156          */
 157         const AS_SELF_REDIRECT = 236;
 158
 159         /**
 160          * Status: can't parse content
 161          */
 162         const AS_PARSE_ERROR = 240;
 163
 164         /**
 165          * HTML id and name for the beginning of the edit form.
 166          */
 167         const EDITFORM_ID = 'editform';
 168
 169         /**
 170          * Prefix of key for cookie used to pass post-edit state.
 171          * The revision id edited is added after this
 172          */
 173         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 174
 175         /**
 176          * Duration of PostEdit cookie, in seconds.
 177          * The cookie will be removed instantly if the JavaScript runs.
 178          *
 179          * Otherwise, though, we don't want the cookies to accumulate.
 180          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 181          * limit of only 20 cookies per domain. This still applies at least to some
 182          * versions of IE without full updates:
 183          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 184          *
 185          * A value of 20 minutes should be enough to take into account slow loads and minor
 186          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 187          */
 188         const POST_EDIT_COOKIE_DURATION = 1200;
 189
 190         /** @var Article */
 191         public $mArticle;
 192
 193         /** @var Title */
 194         public $mTitle;
 195
 196         /** @var null|Title */
 197         private $mContextTitle = null;
 198
 199         /** @var string */
 200         public $action = 'submit';
 201
 202         /** @var bool */
 203         public $isConflict = false;
 204
 205         /** @var bool */
 206         public $isCssJsSubpage = false;
 207
 208         /** @var bool */
 209         public $isCssSubpage = false;
 210
 211         /** @var bool */
 212         public $isJsSubpage = false;
 213
 214         /** @var bool */
 215         public $isWrongCaseCssJsPage = false;
 216
 217         /** @var bool New page or new section */
 218         public $isNew = false;
 219
 220         /** @var bool */
 221         public $deletedSinceEdit;
 222
 223         /** @var string */
 224         public $formtype;
 225
 226         /** @var bool */
 227         public $firsttime;
 228
 229         /** @var bool|stdClass */
 230         public $lastDelete;
 231
 232         /** @var bool */
 233         public $mTokenOk = false;
 234
 235         /** @var bool */
 236         public $mTokenOkExceptSuffix = false;
 237
 238         /** @var bool */
 239         public $mTriedSave = false;
 240
 241         /** @var bool */
 242         public $incompleteForm = false;
 243
 244         /** @var bool */
 245         public $tooBig = false;
 246
 247         /** @var bool */
 248         public $kblength = false;
 249
 250         /** @var bool */
 251         public $missingComment = false;
 252
 253         /** @var bool */
 254         public $missingSummary = false;
 255
 256         /** @var bool */
 257         public $allowBlankSummary = false;
 258
 259         /** @var bool */
 260         protected $blankArticle = false;
 261
 262         /** @var bool */
 263         protected $allowBlankArticle = false;
 264
 265         /** @var bool */
 266         protected $selfRedirect = false;
 267
 268         /** @var bool */
 269         protected $allowSelfRedirect = false;
 270
 271         /** @var string */
 272         public $autoSumm = '';
 273
 274         /** @var string */
 275         public $hookError = '';
 276
 277         /** @var ParserOutput */
 278         public $mParserOutput;
 279
 280         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 281         public $hasPresetSummary = false;
 282
 283         /** @var bool */
 284         public $mBaseRevision = false;
 285
 286         /** @var bool */
 287         public $mShowSummaryField = true;
 288
 289         # Form values
 290
 291         /** @var bool */
 292         public $save = false;
 293
 294         /** @var bool */
 295         public $preview = false;
 296
 297         /** @var bool */
 298         public $diff = false;
 299
 300         /** @var bool */
 301         public $minoredit = false;
 302
 303         /** @var bool */
 304         public $watchthis = false;
 305
 306         /** @var bool */
 307         public $recreate = false;
 308
 309         /** @var string */
 310         public $textbox1 = '';
 311
 312         /** @var string */
 313         public $textbox2 = '';
 314
 315         /** @var string */
 316         public $summary = '';
 317
 318         /** @var bool */
 319         public $nosummary = false;
 320
 321         /** @var string */
 322         public $edittime = '';
 323
 324         /** @var string */
 325         public $section = '';
 326
 327         /** @var string */
 328         public $sectiontitle = '';
 329
 330         /** @var string */
 331         public $starttime = '';
 332
 333         /** @var int */
 334         public $oldid = 0;
 335
 336         /** @var int */
 337         public $parentRevId = 0;
 338
 339         /** @var string */
 340         public $editintro = '';
 341
 342         /** @var null */
 343         public $scrolltop = null;
 344
 345         /** @var bool */
 346         public $bot = true;
 347
 348         /** @var null|string */
 349         public $contentModel = null;
 350
 351         /** @var null|string */
 352         public $contentFormat = null;
 353
 354         # Placeholders for text injection by hooks (must be HTML)
 355         # extensions should take care to _append_ to the present value
 356
 357         /** @var string Before even the preview */
 358         public $editFormPageTop = '';
 359         public $editFormTextTop = '';
 360         public $editFormTextBeforeContent = '';
 361         public $editFormTextAfterWarn = '';
 362         public $editFormTextAfterTools = '';
 363         public $editFormTextBottom = '';
 364         public $editFormTextAfterContent = '';
 365         public $previewTextAfterContent = '';
 366         public $mPreloadContent = null;
 367
 368         /* $didSave should be set to true whenever an article was successfully altered. */
 369         public $didSave = false;
 370         public $undidRev = 0;
 371
 372         public $suppressIntro = false;
 373
 374         /** @var bool Set to true to allow editing of non-text content types. */
 375         public $allowNonTextContent = false;
 376
 377         /** @var bool */
 378         protected $edit;
 379
 380         /** @var bool */
 381         public $live;
 382
 383         /**
 384          * @param Article $article
 385          */
 386         public function __construct( Article $article ) {
 387                 $this->mArticle = $article;
 388                 $this->mTitle = $article->getTitle();
 389
 390                 $this->contentModel = $this->mTitle->getContentModel();
 391
 392                 $handler = ContentHandler::getForModelID( $this->contentModel );
 393                 $this->contentFormat = $handler->getDefaultFormat();
 394         }
 395
 396         /**
 397          * @return Article
 398          */
 399         public function getArticle() {
 400                 return $this->mArticle;
 401         }
 402
 403         /**
 404          * @since 1.19
 405          * @return Title
 406          */
 407         public function getTitle() {
 408                 return $this->mTitle;
 409         }
 410
 411         /**
 412          * Set the context Title object
 413          *
 414          * @param Title|null $title Title object or null
 415          */
 416         public function setContextTitle( $title ) {
 417                 $this->mContextTitle = $title;
 418         }
 419
 420         /**
 421          * Get the context title object.
 422          * If not set, $wgTitle will be returned. This behavior might change in
 423          * the future to return $this->mTitle instead.
 424          *
 425          * @return Title
 426          */
 427         public function getContextTitle() {
 428                 if ( is_null( $this->mContextTitle ) ) {
 429                         global $wgTitle;
 430                         return $wgTitle;
 431                 } else {
 432                         return $this->mContextTitle;
 433                 }
 434         }
 435
 436         /**
 437          * Returns if the given content model is editable.
 438          *
 439          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 440          * @return bool
 441          * @throws MWException If $modelId has no known handler
 442          */
 443         public function isSupportedContentModel( $modelId ) {
 444                 return $this->allowNonTextContent ||
 445                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 446         }
 447
 448         function submit() {
 449                 $this->edit();
 450         }
 451
 452         /**
 453          * This is the function that gets called for "action=edit". It
 454          * sets up various member variables, then passes execution to
 455          * another function, usually showEditForm()
 456          *
 457          * The edit form is self-submitting, so that when things like
 458          * preview and edit conflicts occur, we get the same form back
 459          * with the extra stuff added.  Only when the final submission
 460          * is made and all is well do we actually save and redirect to
 461          * the newly-edited page.
 462          */
 463         function edit() {
 464                 global $wgOut, $wgRequest, $wgUser;
 465                 // Allow extensions to modify/prevent this form or submission
 466                 if ( !Hooks::run( 'AlternateEdit', array( $this ) ) ) {
 467                         return;
 468                 }
 469
 470                 wfDebug( __METHOD__ . ": enter\n" );
 471
 472                 // If they used redlink=1 and the page exists, redirect to the main article
 473                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 474                         $wgOut->redirect( $this->mTitle->getFullURL() );
 475                         return;
 476                 }
 477
 478                 $this->importFormData( $wgRequest );
 479                 $this->firsttime = false;
 480
 481                 if ( $this->live ) {
 482                         $this->livePreview();
 483                         return;
 484                 }
 485
 486                 if ( wfReadOnly() && $this->save ) {
 487                         // Force preview
 488                         $this->save = false;
 489                         $this->preview = true;
 490                 }
 491
 492                 if ( $this->save ) {
 493                         $this->formtype = 'save';
 494                 } elseif ( $this->preview ) {
 495                         $this->formtype = 'preview';
 496                 } elseif ( $this->diff ) {
 497                         $this->formtype = 'diff';
 498                 } else { # First time through
 499                         $this->firsttime = true;
 500                         if ( $this->previewOnOpen() ) {
 501                                 $this->formtype = 'preview';
 502                         } else {
 503                                 $this->formtype = 'initial';
 504                         }
 505                 }
 506
 507                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 508                 if ( $permErrors ) {
 509                         wfDebug( __METHOD__ . ": User can't edit\n" );
 510                         // Auto-block user's IP if the account was "hard" blocked
 511                         $wgUser->spreadAnyEditBlock();
 512
 513                         $this->displayPermissionsError( $permErrors );
 514
 515                         return;
 516                 }
 517
 518                 $this->isConflict = false;
 519                 // css / js subpages of user pages get a special treatment
 520                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 521                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 522                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 523                 // @todo FIXME: Silly assignment.
 524                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 525
 526                 # Show applicable editing introductions
 527                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 528                         $this->showIntro();
 529                 }
 530
 531                 # Attempt submission here.  This will check for edit conflicts,
 532                 # and redundantly check for locked database, blocked IPs, etc.
 533                 # that edit() already checked just in case someone tries to sneak
 534                 # in the back door with a hand-edited submission URL.
 535
 536                 if ( 'save' == $this->formtype ) {
 537                         if ( !$this->attemptSave() ) {
 538                                 return;
 539                         }
 540                 }
 541
 542                 # First time through: get contents, set time for conflict
 543                 # checking, etc.
 544                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 545                         if ( $this->initialiseForm() === false ) {
 546                                 $this->noSuchSectionPage();
 547                                 return;
 548                         }
 549
 550                         if ( !$this->mTitle->getArticleID() ) {
 551                                 Hooks::run( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 552                         } else {
 553                                 Hooks::run( 'EditFormInitialText', array( $this ) );
 554                         }
 555
 556                 }
 557
 558                 $this->showEditForm();
 559         }
 560
 561         /**
 562          * @param string $rigor Same format as Title::getUserPermissionErrors()
 563          * @return array
 564          */
 565         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 566                 global $wgUser;
 567
 568                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 569                 # Can this title be created?
 570                 if ( !$this->mTitle->exists() ) {
 571                         $permErrors = array_merge(
 572                                 $permErrors,
 573                                 wfArrayDiff2(
 574                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 575                                         $permErrors
 576                                 )
 577                         );
 578                 }
 579                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 580                 $remove = array();
 581                 foreach ( $permErrors as $error ) {
 582                         if ( ( $this->preview || $this->diff )
 583                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 584                         ) {
 585                                 $remove[] = $error;
 586                         }
 587                 }
 588                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 589
 590                 return $permErrors;
 591         }
 592
 593         /**
 594          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 595          * but with the following differences:
 596          * - If redlink=1, the user will be redirected to the page
 597          * - If there is content to display or the error occurs while either saving,
 598          *   previewing or showing the difference, it will be a
 599          *   "View source for ..." page displaying the source code after the error message.
 600          *
 601          * @since 1.19
 602          * @param array $permErrors Array of permissions errors, as returned by
 603          *    Title::getUserPermissionsErrors().
 604          * @throws PermissionsError
 605          */
 606         protected function displayPermissionsError( array $permErrors ) {
 607                 global $wgRequest, $wgOut;
 608
 609                 if ( $wgRequest->getBool( 'redlink' ) ) {
 610                         // The edit page was reached via a red link.
 611                         // Redirect to the article page and let them click the edit tab if
 612                         // they really want a permission error.
 613                         $wgOut->redirect( $this->mTitle->getFullURL() );
 614                         return;
 615                 }
 616
 617                 $content = $this->getContentObject();
 618
 619                 # Use the normal message if there's nothing to display
 620                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 621                         $action = $this->mTitle->exists() ? 'edit' :
 622                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 623                         throw new PermissionsError( $action, $permErrors );
 624                 }
 625
 626                 Hooks::run( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 627
 628                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 629                 $wgOut->setPageTitle( wfMessage(
 630                         'viewsource-title',
 631                         $this->getContextTitle()->getPrefixedText()
 632                 ) );
 633                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 634                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 635                 $wgOut->addHTML( "<hr />\n" );
 636
 637                 # If the user made changes, preserve them when showing the markup
 638                 # (This happens when a user is blocked during edit, for instance)
 639                 if ( !$this->firsttime ) {
 640                         $text = $this->textbox1;
 641                         $wgOut->addWikiMsg( 'viewyourtext' );
 642                 } else {
 643                         $text = $this->toEditText( $content );
 644                         $wgOut->addWikiMsg( 'viewsourcetext' );
 645                 }
 646
 647                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 648
 649                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 650                         Linker::formatTemplates( $this->getTemplates() ) ) );
 651
 652                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 653
 654                 if ( $this->mTitle->exists() ) {
 655                         $wgOut->returnToMain( null, $this->mTitle );
 656                 }
 657         }
 658
 659         /**
 660          * Should we show a preview when the edit form is first shown?
 661          *
 662          * @return bool
 663          */
 664         protected function previewOnOpen() {
 665                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 666                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 667                         // Explicit override from request
 668                         return true;
 669                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 670                         // Explicit override from request
 671                         return false;
 672                 } elseif ( $this->section == 'new' ) {
 673                         // Nothing *to* preview for new sections
 674                         return false;
 675                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 676                         && $wgUser->getOption( 'previewonfirst' )
 677                 ) {
 678                         // Standard preference behavior
 679                         return true;
 680                 } elseif ( !$this->mTitle->exists()
 681                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 682                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 683                 ) {
 684                         // Categories are special
 685                         return true;
 686                 } else {
 687                         return false;
 688                 }
 689         }
 690
 691         /**
 692          * Checks whether the user entered a skin name in uppercase,
 693          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 694          *
 695          * @return bool
 696          */
 697         protected function isWrongCaseCssJsPage() {
 698                 if ( $this->mTitle->isCssJsSubpage() ) {
 699                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 700                         $skins = array_merge(
 701                                 array_keys( Skin::getSkinNames() ),
 702                                 array( 'common' )
 703                         );
 704                         return !in_array( $name, $skins )
 705                                 && in_array( strtolower( $name ), $skins );
 706                 } else {
 707                         return false;
 708                 }
 709         }
 710
 711         /**
 712          * Returns whether section editing is supported for the current page.
 713          * Subclasses may override this to replace the default behavior, which is
 714          * to check ContentHandler::supportsSections.
 715          *
 716          * @return bool True if this edit page supports sections, false otherwise.
 717          */
 718         protected function isSectionEditSupported() {
 719                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 720                 return $contentHandler->supportsSections();
 721         }
 722
 723         /**
 724          * This function collects the form data and uses it to populate various member variables.
 725          * @param WebRequest $request
 726          * @throws ErrorPageError
 727          */
 728         function importFormData( &$request ) {
 729                 global $wgContLang, $wgUser;
 730
 731                 # Section edit can come from either the form or a link
 732                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 733
 734                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 735                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 736                 }
 737
 738                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 739
 740                 if ( $request->wasPosted() ) {
 741                         # These fields need to be checked for encoding.
 742                         # Also remove trailing whitespace, but don't remove _initial_
 743                         # whitespace from the text boxes. This may be significant formatting.
 744                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 745                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 746                                 // Skip this if wpTextbox2 has input, it indicates that we came
 747                                 // from a conflict page with raw page text, not a custom form
 748                                 // modified by subclasses
 749                                 $textbox1 = $this->importContentFormData( $request );
 750                                 if ( $textbox1 !== null ) {
 751                                         $this->textbox1 = $textbox1;
 752                                 }
 753                         }
 754
 755                         # Truncate for whole multibyte characters
 756                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 757
 758                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 759                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 760                         # section titles.
 761                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 762
 763                         # Treat sectiontitle the same way as summary.
 764                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 765                         # currently doing double duty as both edit summary and section title. Right now this
 766                         # is just to allow API edits to work around this limitation, but this should be
 767                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 768                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 769                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 770
 771                         $this->edittime = $request->getVal( 'wpEdittime' );
 772                         $this->starttime = $request->getVal( 'wpStarttime' );
 773
 774                         $undidRev = $request->getInt( 'wpUndidRevision' );
 775                         if ( $undidRev ) {
 776                                 $this->undidRev = $undidRev;
 777                         }
 778
 779                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 780
 781                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 782                                 // wpTextbox1 field is missing, possibly due to being "too big"
 783                                 // according to some filter rules such as Suhosin's setting for
 784                                 // suhosin.request.max_value_length (d'oh)
 785                                 $this->incompleteForm = true;
 786                         } else {
 787                                 // If we receive the last parameter of the request, we can fairly
 788                                 // claim the POST request has not been truncated.
 789
 790                                 // TODO: softened the check for cutover.  Once we determine
 791                                 // that it is safe, we should complete the transition by
 792                                 // removing the "edittime" clause.
 793                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 794                                         && is_null( $this->edittime ) );
 795                         }
 796                         if ( $this->incompleteForm ) {
 797                                 # If the form is incomplete, force to preview.
 798                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 799                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 800                                 $this->preview = true;
 801                         } else {
 802                                 /* Fallback for live preview */
 803                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 804                                 $this->diff = $request->getCheck( 'wpDiff' );
 805
 806                                 // Remember whether a save was requested, so we can indicate
 807                                 // if we forced preview due to session failure.
 808                                 $this->mTriedSave = !$this->preview;
 809
 810                                 if ( $this->tokenOk( $request ) ) {
 811                                         # Some browsers will not report any submit button
 812                                         # if the user hits enter in the comment box.
 813                                         # The unmarked state will be assumed to be a save,
 814                                         # if the form seems otherwise complete.
 815                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 816                                 } elseif ( $this->diff ) {
 817                                         # Failed token check, but only requested "Show Changes".
 818                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 819                                 } else {
 820                                         # Page might be a hack attempt posted from
 821                                         # an external site. Preview instead of saving.
 822                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 823                                         $this->preview = true;
 824                                 }
 825                         }
 826                         $this->save = !$this->preview && !$this->diff;
 827                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 828                                 $this->edittime = null;
 829                         }
 830
 831                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 832                                 $this->starttime = null;
 833                         }
 834
 835                         $this->recreate = $request->getCheck( 'wpRecreate' );
 836
 837                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 838                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 839
 840                         # Don't force edit summaries when a user is editing their own user or talk page
 841                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 842                                 && $this->mTitle->getText() == $wgUser->getName()
 843                         ) {
 844                                 $this->allowBlankSummary = true;
 845                         } else {
 846                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 847                                         || !$wgUser->getOption( 'forceeditsummary' );
 848                         }
 849
 850                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 851
 852                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 853                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 854                 } else {
 855                         # Not a posted form? Start with nothing.
 856                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 857                         $this->textbox1 = '';
 858                         $this->summary = '';
 859                         $this->sectiontitle = '';
 860                         $this->edittime = '';
 861                         $this->starttime = wfTimestampNow();
 862                         $this->edit = false;
 863                         $this->preview = false;
 864                         $this->save = false;
 865                         $this->diff = false;
 866                         $this->minoredit = false;
 867                         // Watch may be overridden by request parameters
 868                         $this->watchthis = $request->getBool( 'watchthis', false );
 869                         $this->recreate = false;
 870
 871                         // When creating a new section, we can preload a section title by passing it as the
 872                         // preloadtitle parameter in the URL (Bug 13100)
 873                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 874                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 875                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 876                                 $this->summary = $request->getVal( 'preloadtitle' );
 877                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 878                                 $this->summary = $request->getText( 'summary' );
 879                                 if ( $this->summary !== '' ) {
 880                                         $this->hasPresetSummary = true;
 881                                 }
 882                         }
 883
 884                         if ( $request->getVal( 'minor' ) ) {
 885                                 $this->minoredit = true;
 886                         }
 887                 }
 888
 889                 $this->oldid = $request->getInt( 'oldid' );
 890                 $this->parentRevId = $request->getInt( 'parentRevId' );
 891
 892                 $this->bot = $request->getBool( 'bot', true );
 893                 $this->nosummary = $request->getBool( 'nosummary' );
 894
 895                 // May be overridden by revision.
 896                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 897                 // May be overridden by revision.
 898                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 899
 900                 if ( !ContentHandler::getForModelID( $this->contentModel )
 901                         ->isSupportedFormat( $this->contentFormat )
 902                 ) {
 903                         throw new ErrorPageError(
 904                                 'editpage-notsupportedcontentformat-title',
 905                                 'editpage-notsupportedcontentformat-text',
 906                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 907                         );
 908                 }
 909
 910                 /**
 911                  * @todo Check if the desired model is allowed in this namespace, and if
 912                  *   a transition from the page's current model to the new model is
 913                  *   allowed.
 914                  */
 915
 916                 $this->live = $request->getCheck( 'live' );
 917                 $this->editintro = $request->getText( 'editintro',
 918                         // Custom edit intro for new sections
 919                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 920
 921                 // Allow extensions to modify form data
 922                 Hooks::run( 'EditPage::importFormData', array( $this, $request ) );
 923
 924         }
 925
 926         /**
 927          * Subpage overridable method for extracting the page content data from the
 928          * posted form to be placed in $this->textbox1, if using customized input
 929          * this method should be overridden and return the page text that will be used
 930          * for saving, preview parsing and so on...
 931          *
 932          * @param WebRequest $request
 933          */
 934         protected function importContentFormData( &$request ) {
 935                 return; // Don't do anything, EditPage already extracted wpTextbox1
 936         }
 937
 938         /**
 939          * Initialise form fields in the object
 940          * Called on the first invocation, e.g. when a user clicks an edit link
 941          * @return bool If the requested section is valid
 942          */
 943         function initialiseForm() {
 944                 global $wgUser;
 945                 $this->edittime = $this->mArticle->getTimestamp();
 946
 947                 $content = $this->getContentObject( false ); #TODO: track content object?!
 948                 if ( $content === false ) {
 949                         return false;
 950                 }
 951                 $this->textbox1 = $this->toEditText( $content );
 952
 953                 // activate checkboxes if user wants them to be always active
 954                 # Sort out the "watch" checkbox
 955                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 956                         # Watch all edits
 957                         $this->watchthis = true;
 958                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 959                         # Watch creations
 960                         $this->watchthis = true;
 961                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 962                         # Already watched
 963                         $this->watchthis = true;
 964                 }
 965                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 966                         $this->minoredit = true;
 967                 }
 968                 if ( $this->textbox1 === false ) {
 969                         return false;
 970                 }
 971                 return true;
 972         }
 973
 974         /**
 975          * @param Content|null $def_content The default value to return
 976          *
 977          * @return Content|null Content on success, $def_content for invalid sections
 978          *
 979          * @since 1.21
 980          */
 981         protected function getContentObject( $def_content = null ) {
 982                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 983
 984                 $content = false;
 985
 986                 // For message page not locally set, use the i18n message.
 987                 // For other non-existent articles, use preload text if any.
 988                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 989                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 990                                 # If this is a system message, get the default text.
 991                                 $msg = $this->mTitle->getDefaultMessageText();
 992
 993                                 $content = $this->toEditContent( $msg );
 994                         }
 995                         if ( $content === false ) {
 996                                 # If requested, preload some text.
 997                                 $preload = $wgRequest->getVal( 'preload',
 998                                         // Custom preload text for new sections
 999                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1000                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1001
1002                                 $content = $this->getPreloadedContent( $preload, $params );
1003                         }
1004                 // For existing pages, get text based on "undo" or section parameters.
1005                 } else {
1006                         if ( $this->section != '' ) {
1007                                 // Get section edit text (returns $def_text for invalid sections)
1008                                 $orig = $this->getOriginalContent( $wgUser );
1009                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1010
1011                                 if ( !$content ) {
1012                                         $content = $def_content;
1013                                 }
1014                         } else {
1015                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1016                                 $undo = $wgRequest->getInt( 'undo' );
1017
1018                                 if ( $undo > 0 && $undoafter > 0 ) {
1019
1020                                         $undorev = Revision::newFromId( $undo );
1021                                         $oldrev = Revision::newFromId( $undoafter );
1022
1023                                         # Sanity check, make sure it's the right page,
1024                                         # the revisions exist and they were not deleted.
1025                                         # Otherwise, $content will be left as-is.
1026                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1027                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1028                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1029
1030                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1031
1032                                                 if ( $content === false ) {
1033                                                         # Warn the user that something went wrong
1034                                                         $undoMsg = 'failure';
1035                                                 } else {
1036                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1037                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1038                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1039
1040                                                         if ( $newContent->equals( $oldContent ) ) {
1041                                                                 # Tell the user that the undo results in no change,
1042                                                                 # i.e. the revisions were already undone.
1043                                                                 $undoMsg = 'nochange';
1044                                                                 $content = false;
1045                                                         } else {
1046                                                                 # Inform the user of our success and set an automatic edit summary
1047                                                                 $undoMsg = 'success';
1048
1049                                                                 # If we just undid one rev, use an autosummary
1050                                                                 $firstrev = $oldrev->getNext();
1051                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1052                                                                         $userText = $undorev->getUserText();
1053                                                                         if ( $userText === '' ) {
1054                                                                                 $undoSummary = wfMessage(
1055                                                                                         'undo-summary-username-hidden',
1056                                                                                         $undo
1057                                                                                 )->inContentLanguage()->text();
1058                                                                         } else {
1059                                                                                 $undoSummary = wfMessage(
1060                                                                                         'undo-summary',
1061                                                                                         $undo,
1062                                                                                         $userText
1063                                                                                 )->inContentLanguage()->text();
1064                                                                         }
1065                                                                         if ( $this->summary === '' ) {
1066                                                                                 $this->summary = $undoSummary;
1067                                                                         } else {
1068                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1069                                                                                         ->inContentLanguage()->text() . $this->summary;
1070                                                                         }
1071                                                                         $this->undidRev = $undo;
1072                                                                 }
1073                                                                 $this->formtype = 'diff';
1074                                                         }
1075                                                 }
1076                                         } else {
1077                                                 // Failed basic sanity checks.
1078                                                 // Older revisions may have been removed since the link
1079                                                 // was created, or we may simply have got bogus input.
1080                                                 $undoMsg = 'norev';
1081                                         }
1082
1083                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1084                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1085                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1086                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1087                                 }
1088
1089                                 if ( $content === false ) {
1090                                         $content = $this->getOriginalContent( $wgUser );
1091                                 }
1092                         }
1093                 }
1094
1095                 return $content;
1096         }
1097
1098         /**
1099          * Get the content of the wanted revision, without section extraction.
1100          *
1101          * The result of this function can be used to compare user's input with
1102          * section replaced in its context (using WikiPage::replaceSection())
1103          * to the original text of the edit.
1104          *
1105          * This differs from Article::getContent() that when a missing revision is
1106          * encountered the result will be null and not the
1107          * 'missing-revision' message.
1108          *
1109          * @since 1.19
1110          * @param User $user The user to get the revision for
1111          * @return Content|null
1112          */
1113         private function getOriginalContent( User $user ) {
1114                 if ( $this->section == 'new' ) {
1115                         return $this->getCurrentContent();
1116                 }
1117                 $revision = $this->mArticle->getRevisionFetched();
1118                 if ( $revision === null ) {
1119                         if ( !$this->contentModel ) {
1120                                 $this->contentModel = $this->getTitle()->getContentModel();
1121                         }
1122                         $handler = ContentHandler::getForModelID( $this->contentModel );
1123
1124                         return $handler->makeEmptyContent();
1125                 }
1126                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1127                 return $content;
1128         }
1129
1130         /**
1131          * Get the current content of the page. This is basically similar to
1132          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1133          * content object is returned instead of null.
1134          *
1135          * @since 1.21
1136          * @return Content
1137          */
1138         protected function getCurrentContent() {
1139                 $rev = $this->mArticle->getRevision();
1140                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1141
1142                 if ( $content === false || $content === null ) {
1143                         if ( !$this->contentModel ) {
1144                                 $this->contentModel = $this->getTitle()->getContentModel();
1145                         }
1146                         $handler = ContentHandler::getForModelID( $this->contentModel );
1147
1148                         return $handler->makeEmptyContent();
1149                 } else {
1150                         # nasty side-effect, but needed for consistency
1151                         $this->contentModel = $rev->getContentModel();
1152                         $this->contentFormat = $rev->getContentFormat();
1153
1154                         return $content;
1155                 }
1156         }
1157
1158         /**
1159          * Use this method before edit() to preload some content into the edit box
1160          *
1161          * @param Content $content
1162          *
1163          * @since 1.21
1164          */
1165         public function setPreloadedContent( Content $content ) {
1166                 $this->mPreloadContent = $content;
1167         }
1168
1169         /**
1170          * Get the contents to be preloaded into the box, either set by
1171          * an earlier setPreloadText() or by loading the given page.
1172          *
1173          * @param string $preload Representing the title to preload from.
1174          * @param array $params Parameters to use (interface-message style) in the preloaded text
1175          *
1176          * @return Content
1177          *
1178          * @since 1.21
1179          */
1180         protected function getPreloadedContent( $preload, $params = array() ) {
1181                 global $wgUser;
1182
1183                 if ( !empty( $this->mPreloadContent ) ) {
1184                         return $this->mPreloadContent;
1185                 }
1186
1187                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1188
1189                 if ( $preload === '' ) {
1190                         return $handler->makeEmptyContent();
1191                 }
1192
1193                 $title = Title::newFromText( $preload );
1194                 # Check for existence to avoid getting MediaWiki:Noarticletext
1195                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1196                         //TODO: somehow show a warning to the user!
1197                         return $handler->makeEmptyContent();
1198                 }
1199
1200                 $page = WikiPage::factory( $title );
1201                 if ( $page->isRedirect() ) {
1202                         $title = $page->getRedirectTarget();
1203                         # Same as before
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                         $page = WikiPage::factory( $title );
1209                 }
1210
1211                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1212                 $content = $page->getContent( Revision::RAW );
1213
1214                 if ( !$content ) {
1215                         //TODO: somehow show a warning to the user!
1216                         return $handler->makeEmptyContent();
1217                 }
1218
1219                 if ( $content->getModel() !== $handler->getModelID() ) {
1220                         $converted = $content->convert( $handler->getModelID() );
1221
1222                         if ( !$converted ) {
1223                                 //TODO: somehow show a warning to the user!
1224                                 wfDebug( "Attempt to preload incompatible content: "
1225                                                 . "can't convert " . $content->getModel()
1226                                                 . " to " . $handler->getModelID() );
1227
1228                                 return $handler->makeEmptyContent();
1229                         }
1230
1231                         $content = $converted;
1232                 }
1233
1234                 return $content->preloadTransform( $title, $parserOptions, $params );
1235         }
1236
1237         /**
1238          * Make sure the form isn't faking a user's credentials.
1239          *
1240          * @param WebRequest $request
1241          * @return bool
1242          * @private
1243          */
1244         function tokenOk( &$request ) {
1245                 global $wgUser;
1246                 $token = $request->getVal( 'wpEditToken' );
1247                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1248                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1249                 return $this->mTokenOk;
1250         }
1251
1252         /**
1253          * Sets post-edit cookie indicating the user just saved a particular revision.
1254          *
1255          * This uses a temporary cookie for each revision ID so separate saves will never
1256          * interfere with each other.
1257          *
1258          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1259          * the redirect.  It must be clearable by JavaScript code, so it must not be
1260          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1261          * variable.
1262          *
1263          * If the variable were set on the server, it would be cached, which is unwanted
1264          * since the post-edit state should only apply to the load right after the save.
1265          *
1266          * @param int $statusValue The status value (to check for new article status)
1267          */
1268         protected function setPostEditCookie( $statusValue ) {
1269                 $revisionId = $this->mArticle->getLatest();
1270                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1271
1272                 $val = 'saved';
1273                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1274                         $val = 'created';
1275                 } elseif ( $this->oldid ) {
1276                         $val = 'restored';
1277                 }
1278
1279                 $response = RequestContext::getMain()->getRequest()->response();
1280                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1281                         'httpOnly' => false,
1282                 ) );
1283         }
1284
1285         /**
1286          * Attempt submission
1287          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1288          * @return bool False if output is done, true if the rest of the form should be displayed
1289          */
1290         public function attemptSave() {
1291                 global $wgUser;
1292
1293                 $resultDetails = false;
1294                 # Allow bots to exempt some edits from bot flagging
1295                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1296                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1297
1298                 return $this->handleStatus( $status, $resultDetails );
1299         }
1300
1301         /**
1302          * Handle status, such as after attempt save
1303          *
1304          * @param Status $status
1305          * @param array|bool $resultDetails
1306          *
1307          * @throws ErrorPageError
1308          * @return bool False, if output is done, true if rest of the form should be displayed
1309          */
1310         private function handleStatus( Status $status, $resultDetails ) {
1311                 global $wgUser, $wgOut;
1312
1313                 /**
1314                  * @todo FIXME: once the interface for internalAttemptSave() is made
1315                  *   nicer, this should use the message in $status
1316                  */
1317                 if ( $status->value == self::AS_SUCCESS_UPDATE
1318                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1319                 ) {
1320                         $this->didSave = true;
1321                         if ( !$resultDetails['nullEdit'] ) {
1322                                 $this->setPostEditCookie( $status->value );
1323                         }
1324                 }
1325
1326                 switch ( $status->value ) {
1327                         case self::AS_HOOK_ERROR_EXPECTED:
1328                         case self::AS_CONTENT_TOO_BIG:
1329                         case self::AS_ARTICLE_WAS_DELETED:
1330                         case self::AS_CONFLICT_DETECTED:
1331                         case self::AS_SUMMARY_NEEDED:
1332                         case self::AS_TEXTBOX_EMPTY:
1333                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1334                         case self::AS_END:
1335                         case self::AS_BLANK_ARTICLE:
1336                         case self::AS_SELF_REDIRECT:
1337                                 return true;
1338
1339                         case self::AS_HOOK_ERROR:
1340                                 return false;
1341
1342                         case self::AS_PARSE_ERROR:
1343                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1344                                 return true;
1345
1346                         case self::AS_SUCCESS_NEW_ARTICLE:
1347                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1348                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1349                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1350                                 return false;
1351
1352                         case self::AS_SUCCESS_UPDATE:
1353                                 $extraQuery = '';
1354                                 $sectionanchor = $resultDetails['sectionanchor'];
1355
1356                                 // Give extensions a chance to modify URL query on update
1357                                 Hooks::run(
1358                                         'ArticleUpdateBeforeRedirect',
1359                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1360                                 );
1361
1362                                 if ( $resultDetails['redirect'] ) {
1363                                         if ( $extraQuery == '' ) {
1364                                                 $extraQuery = 'redirect=no';
1365                                         } else {
1366                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1367                                         }
1368                                 }
1369                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1370                                 return false;
1371
1372                         case self::AS_SPAM_ERROR:
1373                                 $this->spamPageWithContent( $resultDetails['spam'] );
1374                                 return false;
1375
1376                         case self::AS_BLOCKED_PAGE_FOR_USER:
1377                                 throw new UserBlockedError( $wgUser->getBlock() );
1378
1379                         case self::AS_IMAGE_REDIRECT_ANON:
1380                         case self::AS_IMAGE_REDIRECT_LOGGED:
1381                                 throw new PermissionsError( 'upload' );
1382
1383                         case self::AS_READ_ONLY_PAGE_ANON:
1384                         case self::AS_READ_ONLY_PAGE_LOGGED:
1385                                 throw new PermissionsError( 'edit' );
1386
1387                         case self::AS_READ_ONLY_PAGE:
1388                                 throw new ReadOnlyError;
1389
1390                         case self::AS_RATE_LIMITED:
1391                                 throw new ThrottledError();
1392
1393                         case self::AS_NO_CREATE_PERMISSION:
1394                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1395                                 throw new PermissionsError( $permission );
1396
1397                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1398                                 throw new PermissionsError( 'editcontentmodel' );
1399
1400                         default:
1401                                 // We don't recognize $status->value. The only way that can happen
1402                                 // is if an extension hook aborted from inside ArticleSave.
1403                                 // Render the status object into $this->hookError
1404                                 // FIXME this sucks, we should just use the Status object throughout
1405                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1406                                         '</div>';
1407                                 return true;
1408                 }
1409         }
1410
1411         /**
1412          * Run hooks that can filter edits just before they get saved.
1413          *
1414          * @param Content $content The Content to filter.
1415          * @param Status $status For reporting the outcome to the caller
1416          * @param User $user The user performing the edit
1417          *
1418          * @return bool
1419          */
1420         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1421                 // Run old style post-section-merge edit filter
1422                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1423                         array( $this, $content, &$this->hookError, $this->summary ) )
1424                 ) {
1425                         # Error messages etc. could be handled within the hook...
1426                         $status->fatal( 'hookaborted' );
1427                         $status->value = self::AS_HOOK_ERROR;
1428                         return false;
1429                 } elseif ( $this->hookError != '' ) {
1430                         # ...or the hook could be expecting us to produce an error
1431                         $status->fatal( 'hookaborted' );
1432                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1433                         return false;
1434                 }
1435
1436                 // Run new style post-section-merge edit filter
1437                 if ( !Hooks::run( 'EditFilterMergedContent',
1438                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1439                                 $user, $this->minoredit ) )
1440                 ) {
1441                         # Error messages etc. could be handled within the hook...
1442                         if ( $status->isGood() ) {
1443                                 $status->fatal( 'hookaborted' );
1444                                 // Not setting $this->hookError here is a hack to allow the hook
1445                                 // to cause a return to the edit page without $this->hookError
1446                                 // being set. This is used by ConfirmEdit to display a captcha
1447                                 // without any error message cruft.
1448                         } else {
1449                                 $this->hookError = $status->getWikiText();
1450                         }
1451                         // Use the existing $status->value if the hook set it
1452                         if ( !$status->value ) {
1453                                 $status->value = self::AS_HOOK_ERROR;
1454                         }
1455                         return false;
1456                 } elseif ( !$status->isOK() ) {
1457                         # ...or the hook could be expecting us to produce an error
1458                         // FIXME this sucks, we should just use the Status object throughout
1459                         $this->hookError = $status->getWikiText();
1460                         $status->fatal( 'hookaborted' );
1461                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1462                         return false;
1463                 }
1464
1465                 return true;
1466         }
1467
1468         /**
1469          * Return the summary to be used for a new section.
1470          *
1471          * @param string $sectionanchor Set to the section anchor text
1472          * @return string
1473          */
1474         private function newSectionSummary( &$sectionanchor = null ) {
1475                 global $wgParser;
1476
1477                 if ( $this->sectiontitle !== '' ) {
1478                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1479                         // If no edit summary was specified, create one automatically from the section
1480                         // title and have it link to the new section. Otherwise, respect the summary as
1481                         // passed.
1482                         if ( $this->summary === '' ) {
1483                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1484                                 return wfMessage( 'newsectionsummary' )
1485                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1486                         }
1487                 } elseif ( $this->summary !== '' ) {
1488                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1489                         # This is a new section, so create a link to the new section
1490                         # in the revision summary.
1491                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1492                         return wfMessage( 'newsectionsummary' )
1493                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1494                 }
1495                 return $this->summary;
1496         }
1497
1498         /**
1499          * Attempt submission (no UI)
1500          *
1501          * @param array $result Array to add statuses to, currently with the
1502          *   possible keys:
1503          *   - spam (string): Spam string from content if any spam is detected by
1504          *     matchSpamRegex.
1505          *   - sectionanchor (string): Section anchor for a section save.
1506          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1507          *     false otherwise.
1508          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1509          *     revision is a redirect.
1510          * @param bool $bot True if edit is being made under the bot right.
1511          *
1512          * @return Status Status object, possibly with a message, but always with
1513          *   one of the AS_* constants in $status->value,
1514          *
1515          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1516          *   various error display idiosyncrasies. There are also lots of cases
1517          *   where error metadata is set in the object and retrieved later instead
1518          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1519          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1520          * time.
1521          */
1522         function internalAttemptSave( &$result, $bot = false ) {
1523                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1524
1525                 $status = Status::newGood();
1526
1527                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1528                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1529                         $status->fatal( 'hookaborted' );
1530                         $status->value = self::AS_HOOK_ERROR;
1531                         return $status;
1532                 }
1533
1534                 $spam = $wgRequest->getText( 'wpAntispam' );
1535                 if ( $spam !== '' ) {
1536                         wfDebugLog(
1537                                 'SimpleAntiSpam',
1538                                 $wgUser->getName() .
1539                                 ' editing "' .
1540                                 $this->mTitle->getPrefixedText() .
1541                                 '" submitted bogus field "' .
1542                                 $spam .
1543                                 '"'
1544                         );
1545                         $status->fatal( 'spamprotectionmatch', false );
1546                         $status->value = self::AS_SPAM_ERROR;
1547                         return $status;
1548                 }
1549
1550                 try {
1551                         # Construct Content object
1552                         $textbox_content = $this->toEditContent( $this->textbox1 );
1553                 } catch ( MWContentSerializationException $ex ) {
1554                         $status->fatal(
1555                                 'content-failed-to-parse',
1556                                 $this->contentModel,
1557                                 $this->contentFormat,
1558                                 $ex->getMessage()
1559                         );
1560                         $status->value = self::AS_PARSE_ERROR;
1561                         return $status;
1562                 }
1563
1564                 # Check image redirect
1565                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1566                         $textbox_content->isRedirect() &&
1567                         !$wgUser->isAllowed( 'upload' )
1568                 ) {
1569                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1570                                 $status->setResult( false, $code );
1571
1572                                 return $status;
1573                 }
1574
1575                 # Check for spam
1576                 $match = self::matchSummarySpamRegex( $this->summary );
1577                 if ( $match === false && $this->section == 'new' ) {
1578                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1579                         # regular summaries, it is added to the actual wikitext.
1580                         if ( $this->sectiontitle !== '' ) {
1581                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1582                                 $match = self::matchSpamRegex( $this->sectiontitle );
1583                         } else {
1584                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1585                                 # is used with the 'summary' parameter.
1586                                 $match = self::matchSpamRegex( $this->summary );
1587                         }
1588                 }
1589                 if ( $match === false ) {
1590                         $match = self::matchSpamRegex( $this->textbox1 );
1591                 }
1592                 if ( $match !== false ) {
1593                         $result['spam'] = $match;
1594                         $ip = $wgRequest->getIP();
1595                         $pdbk = $this->mTitle->getPrefixedDBkey();
1596                         $match = str_replace( "\n", '', $match );
1597                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1598                         $status->fatal( 'spamprotectionmatch', $match );
1599                         $status->value = self::AS_SPAM_ERROR;
1600                         return $status;
1601                 }
1602                 if ( !Hooks::run(
1603                         'EditFilter',
1604                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1605                 ) {
1606                         # Error messages etc. could be handled within the hook...
1607                         $status->fatal( 'hookaborted' );
1608                         $status->value = self::AS_HOOK_ERROR;
1609                         return $status;
1610                 } elseif ( $this->hookError != '' ) {
1611                         # ...or the hook could be expecting us to produce an error
1612                         $status->fatal( 'hookaborted' );
1613                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1614                         return $status;
1615                 }
1616
1617                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1618                         // Auto-block user's IP if the account was "hard" blocked
1619                         $wgUser->spreadAnyEditBlock();
1620                         # Check block state against master, thus 'false'.
1621                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1622                         return $status;
1623                 }
1624
1625                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1626                 if ( $this->kblength > $wgMaxArticleSize ) {
1627                         // Error will be displayed by showEditForm()
1628                         $this->tooBig = true;
1629                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1630                         return $status;
1631                 }
1632
1633                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1634                         if ( $wgUser->isAnon() ) {
1635                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1636                                 return $status;
1637                         } else {
1638                                 $status->fatal( 'readonlytext' );
1639                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1640                                 return $status;
1641                         }
1642                 }
1643
1644                 if ( $this->contentModel !== $this->mTitle->getContentModel()
1645                         && !$wgUser->isAllowed( 'editcontentmodel' )
1646                 ) {
1647                         $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1648                         return $status;
1649                 }
1650
1651                 if ( wfReadOnly() ) {
1652                         $status->fatal( 'readonlytext' );
1653                         $status->value = self::AS_READ_ONLY_PAGE;
1654                         return $status;
1655                 }
1656                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1657                         $status->fatal( 'actionthrottledtext' );
1658                         $status->value = self::AS_RATE_LIMITED;
1659                         return $status;
1660                 }
1661
1662                 # If the article has been deleted while editing, don't save it without
1663                 # confirmation
1664                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1665                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1666                         return $status;
1667                 }
1668
1669                 # Load the page data from the master. If anything changes in the meantime,
1670                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1671                 $this->mArticle->loadPageData( 'fromdbmaster' );
1672                 $new = !$this->mArticle->exists();
1673
1674                 if ( $new ) {
1675                         // Late check for create permission, just in case *PARANOIA*
1676                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1677                                 $status->fatal( 'nocreatetext' );
1678                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1679                                 wfDebug( __METHOD__ . ": no create permission\n" );
1680                                 return $status;
1681                         }
1682
1683                         // Don't save a new page if it's blank or if it's a MediaWiki:
1684                         // message with content equivalent to default (allow empty pages
1685                         // in this case to disable messages, see bug 50124)
1686                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1687                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1688                                 $defaultText = $defaultMessageText;
1689                         } else {
1690                                 $defaultText = '';
1691                         }
1692
1693                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1694                                 $this->blankArticle = true;
1695                                 $status->fatal( 'blankarticle' );
1696                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1697                                 return $status;
1698                         }
1699
1700                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1701                                 return $status;
1702                         }
1703
1704                         $content = $textbox_content;
1705
1706                         $result['sectionanchor'] = '';
1707                         if ( $this->section == 'new' ) {
1708                                 if ( $this->sectiontitle !== '' ) {
1709                                         // Insert the section title above the content.
1710                                         $content = $content->addSectionHeader( $this->sectiontitle );
1711                                 } elseif ( $this->summary !== '' ) {
1712                                         // Insert the section title above the content.
1713                                         $content = $content->addSectionHeader( $this->summary );
1714                                 }
1715                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1716                         }
1717
1718                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1719
1720                 } else { # not $new
1721
1722                         # Article exists. Check for edit conflict.
1723
1724                         $this->mArticle->clear(); # Force reload of dates, etc.
1725                         $timestamp = $this->mArticle->getTimestamp();
1726
1727                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1728
1729                         if ( $timestamp != $this->edittime ) {
1730                                 $this->isConflict = true;
1731                                 if ( $this->section == 'new' ) {
1732                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1733                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1734                                         ) {
1735                                                 // Probably a duplicate submission of a new comment.
1736                                                 // This can happen when squid resends a request after
1737                                                 // a timeout but the first one actually went through.
1738                                                 wfDebug( __METHOD__
1739                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1740                                         } else {
1741                                                 // New comment; suppress conflict.
1742                                                 $this->isConflict = false;
1743                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1744                                         }
1745                                 } elseif ( $this->section == ''
1746                                         && Revision::userWasLastToEdit(
1747                                                 DB_MASTER, $this->mTitle->getArticleID(),
1748                                                 $wgUser->getId(), $this->edittime
1749                                         )
1750                                 ) {
1751                                         # Suppress edit conflict with self, except for section edits where merging is required.
1752                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1753                                         $this->isConflict = false;
1754                                 }
1755                         }
1756
1757                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1758                         if ( $this->sectiontitle !== '' ) {
1759                                 $sectionTitle = $this->sectiontitle;
1760                         } else {
1761                                 $sectionTitle = $this->summary;
1762                         }
1763
1764                         $content = null;
1765
1766                         if ( $this->isConflict ) {
1767                                 wfDebug( __METHOD__
1768                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1769                                         . " (article time '{$timestamp}')\n" );
1770
1771                                 $content = $this->mArticle->replaceSectionContent(
1772                                         $this->section,
1773                                         $textbox_content,
1774                                         $sectionTitle,
1775                                         $this->edittime
1776                                 );
1777                         } else {
1778                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1779                                 $content = $this->mArticle->replaceSectionContent(
1780                                         $this->section,
1781                                         $textbox_content,
1782                                         $sectionTitle
1783                                 );
1784                         }
1785
1786                         if ( is_null( $content ) ) {
1787                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1788                                 $this->isConflict = true;
1789                                 $content = $textbox_content; // do not try to merge here!
1790                         } elseif ( $this->isConflict ) {
1791                                 # Attempt merge
1792                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1793                                         // Successful merge! Maybe we should tell the user the good news?
1794                                         $this->isConflict = false;
1795                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1796                                 } else {
1797                                         $this->section = '';
1798                                         $this->textbox1 = ContentHandler::getContentText( $content );
1799                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1800                                 }
1801                         }
1802
1803                         if ( $this->isConflict ) {
1804                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1805                                 return $status;
1806                         }
1807
1808                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1809                                 return $status;
1810                         }
1811
1812                         if ( $this->section == 'new' ) {
1813                                 // Handle the user preference to force summaries here
1814                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1815                                         $this->missingSummary = true;
1816                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1817                                         $status->value = self::AS_SUMMARY_NEEDED;
1818                                         return $status;
1819                                 }
1820
1821                                 // Do not allow the user to post an empty comment
1822                                 if ( $this->textbox1 == '' ) {
1823                                         $this->missingComment = true;
1824                                         $status->fatal( 'missingcommenttext' );
1825                                         $status->value = self::AS_TEXTBOX_EMPTY;
1826                                         return $status;
1827                                 }
1828                         } elseif ( !$this->allowBlankSummary
1829                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1830                                 && !$content->isRedirect()
1831                                 && md5( $this->summary ) == $this->autoSumm
1832                         ) {
1833                                 $this->missingSummary = true;
1834                                 $status->fatal( 'missingsummary' );
1835                                 $status->value = self::AS_SUMMARY_NEEDED;
1836                                 return $status;
1837                         }
1838
1839                         # All's well
1840                         $sectionanchor = '';
1841                         if ( $this->section == 'new' ) {
1842                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1843                         } elseif ( $this->section != '' ) {
1844                                 # Try to get a section anchor from the section source, redirect
1845                                 # to edited section if header found.
1846                                 # XXX: Might be better to integrate this into Article::replaceSection
1847                                 # for duplicate heading checking and maybe parsing.
1848                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1849                                 # We can't deal with anchors, includes, html etc in the header for now,
1850                                 # headline would need to be parsed to improve this.
1851                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1852                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1853                                 }
1854                         }
1855                         $result['sectionanchor'] = $sectionanchor;
1856
1857                         // Save errors may fall down to the edit form, but we've now
1858                         // merged the section into full text. Clear the section field
1859                         // so that later submission of conflict forms won't try to
1860                         // replace that into a duplicated mess.
1861                         $this->textbox1 = $this->toEditText( $content );
1862                         $this->section = '';
1863
1864                         $status->value = self::AS_SUCCESS_UPDATE;
1865                 }
1866
1867                 if ( !$this->allowSelfRedirect
1868                         && $content->isRedirect()
1869                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1870                 ) {
1871                         // If the page already redirects to itself, don't warn.
1872                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1873                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1874                                 $this->selfRedirect = true;
1875                                 $status->fatal( 'selfredirect' );
1876                                 $status->value = self::AS_SELF_REDIRECT;
1877                                 return $status;
1878                         }
1879                 }
1880
1881                 // Check for length errors again now that the section is merged in
1882                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1883                 if ( $this->kblength > $wgMaxArticleSize ) {
1884                         $this->tooBig = true;
1885                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1886                         return $status;
1887                 }
1888
1889                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1890                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1891                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1892                         ( $bot ? EDIT_FORCE_BOT : 0 );
1893
1894                 $doEditStatus = $this->mArticle->doEditContent(
1895                         $content,
1896                         $this->summary,
1897                         $flags,
1898                         false,
1899                         null,
1900                         $content->getDefaultFormat()
1901                 );
1902
1903                 if ( !$doEditStatus->isOK() ) {
1904                         // Failure from doEdit()
1905                         // Show the edit conflict page for certain recognized errors from doEdit(),
1906                         // but don't show it for errors from extension hooks
1907                         $errors = $doEditStatus->getErrorsArray();
1908                         if ( in_array( $errors[0][0],
1909                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1910                         ) {
1911                                 $this->isConflict = true;
1912                                 // Destroys data doEdit() put in $status->value but who cares
1913                                 $doEditStatus->value = self::AS_END;
1914                         }
1915                         return $doEditStatus;
1916                 }
1917
1918                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1919                 if ( $result['nullEdit'] ) {
1920                         // We don't know if it was a null edit until now, so increment here
1921                         $wgUser->pingLimiter( 'linkpurge' );
1922                 }
1923                 $result['redirect'] = $content->isRedirect();
1924                 $this->updateWatchlist();
1925                 return $status;
1926         }
1927
1928         /**
1929          * Register the change of watch status
1930          */
1931         protected function updateWatchlist() {
1932                 global $wgUser;
1933
1934                 if ( $wgUser->isLoggedIn()
1935                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1936                 ) {
1937                         $fname = __METHOD__;
1938                         $title = $this->mTitle;
1939                         $watch = $this->watchthis;
1940
1941                         // Do this in its own transaction to reduce contention...
1942                         $dbw = wfGetDB( DB_MASTER );
1943                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1944                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1945                         } );
1946                 }
1947         }
1948
1949         /**
1950          * Attempts to do 3-way merge of edit content with a base revision
1951          * and current content, in case of edit conflict, in whichever way appropriate
1952          * for the content type.
1953          *
1954          * @since 1.21
1955          *
1956          * @param Content $editContent
1957          *
1958          * @return bool
1959          */
1960         private function mergeChangesIntoContent( &$editContent ) {
1961
1962                 $db = wfGetDB( DB_MASTER );
1963
1964                 // This is the revision the editor started from
1965                 $baseRevision = $this->getBaseRevision();
1966                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1967
1968                 if ( is_null( $baseContent ) ) {
1969                         return false;
1970                 }
1971
1972                 // The current state, we want to merge updates into it
1973                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1974                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1975
1976                 if ( is_null( $currentContent ) ) {
1977                         return false;
1978                 }
1979
1980                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1981
1982                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1983
1984                 if ( $result ) {
1985                         $editContent = $result;
1986                         return true;
1987                 }
1988
1989                 return false;
1990         }
1991
1992         /**
1993          * @return Revision
1994          */
1995         function getBaseRevision() {
1996                 if ( !$this->mBaseRevision ) {
1997                         $db = wfGetDB( DB_MASTER );
1998                         $this->mBaseRevision = Revision::loadFromTimestamp(
1999                                 $db, $this->mTitle, $this->edittime );
2000                 }
2001                 return $this->mBaseRevision;
2002         }
2003
2004         /**
2005          * Check given input text against $wgSpamRegex, and return the text of the first match.
2006          *
2007          * @param string $text
2008          *
2009          * @return string|bool Matching string or false
2010          */
2011         public static function matchSpamRegex( $text ) {
2012                 global $wgSpamRegex;
2013                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2014                 $regexes = (array)$wgSpamRegex;
2015                 return self::matchSpamRegexInternal( $text, $regexes );
2016         }
2017
2018         /**
2019          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2020          *
2021          * @param string $text
2022          *
2023          * @return string|bool Matching string or false
2024          */
2025         public static function matchSummarySpamRegex( $text ) {
2026                 global $wgSummarySpamRegex;
2027                 $regexes = (array)$wgSummarySpamRegex;
2028                 return self::matchSpamRegexInternal( $text, $regexes );
2029         }
2030
2031         /**
2032          * @param string $text
2033          * @param array $regexes
2034          * @return bool|string
2035          */
2036         protected static function matchSpamRegexInternal( $text, $regexes ) {
2037                 foreach ( $regexes as $regex ) {
2038                         $matches = array();
2039                         if ( preg_match( $regex, $text, $matches ) ) {
2040                                 return $matches[0];
2041                         }
2042                 }
2043                 return false;
2044         }
2045
2046         function setHeaders() {
2047                 global $wgOut, $wgUser, $wgAjaxEditStash;
2048
2049                 $wgOut->addModules( 'mediawiki.action.edit' );
2050                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2051
2052                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2053                         // The addition of default buttons is handled by getEditToolbar() which
2054                         // has its own dependency on this module. The call here ensures the module
2055                         // is loaded in time (it has position "top") for other modules to register
2056                         // buttons (e.g. extensions, gadgets, user scripts).
2057                         $wgOut->addModules( 'mediawiki.toolbar' );
2058                 }
2059
2060                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2061                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2062                 }
2063
2064                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2065                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2066                 }
2067
2068                 if ( $wgAjaxEditStash ) {
2069                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2070                 }
2071
2072                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2073
2074                 # Enabled article-related sidebar, toplinks, etc.
2075                 $wgOut->setArticleRelated( true );
2076
2077                 $contextTitle = $this->getContextTitle();
2078                 if ( $this->isConflict ) {
2079                         $msg = 'editconflict';
2080                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2081                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2082                 } else {
2083                         $msg = $contextTitle->exists()
2084                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2085                                         && $contextTitle->getDefaultMessageText() !== false
2086                                 )
2087                                 ? 'editing'
2088                                 : 'creating';
2089                 }
2090
2091                 # Use the title defined by DISPLAYTITLE magic word when present
2092                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2093                 if ( $displayTitle === false ) {
2094                         $displayTitle = $contextTitle->getPrefixedText();
2095                 }
2096                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2097         }
2098
2099         /**
2100          * Show all applicable editing introductions
2101          */
2102         protected function showIntro() {
2103                 global $wgOut, $wgUser;
2104                 if ( $this->suppressIntro ) {
2105                         return;
2106                 }
2107
2108                 $namespace = $this->mTitle->getNamespace();
2109
2110                 if ( $namespace == NS_MEDIAWIKI ) {
2111                         # Show a warning if editing an interface message
2112                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2113                         # If this is a default message (but not css or js),
2114                         # show a hint that it is translatable on translatewiki.net
2115                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2116                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2117                         ) {
2118                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2119                                 if ( $defaultMessageText !== false ) {
2120                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2121                                                 'translateinterface' );
2122                                 }
2123                         }
2124                 } elseif ( $namespace == NS_FILE ) {
2125                         # Show a hint to shared repo
2126                         $file = wfFindFile( $this->mTitle );
2127                         if ( $file && !$file->isLocal() ) {
2128                                 $descUrl = $file->getDescriptionUrl();
2129                                 # there must be a description url to show a hint to shared repo
2130                                 if ( $descUrl ) {
2131                                         if ( !$this->mTitle->exists() ) {
2132                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2133                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2134                                                 ) );
2135                                         } else {
2136                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2137                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2138                                                 ) );
2139                                         }
2140                                 }
2141                         }
2142                 }
2143
2144                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2145                 # Show log extract when the user is currently blocked
2146                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2147                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2148                         $username = $parts[0];
2149                         $user = User::newFromName( $username, false /* allow IP users*/ );
2150                         $ip = User::isIP( $username );
2151                         $block = Block::newFromTarget( $user, $user );
2152                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2153                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2154                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2155                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2156                                 # Show log extract if the user is currently blocked
2157                                 LogEventsList::showLogExtract(
2158                                         $wgOut,
2159                                         'block',
2160                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2161                                         '',
2162                                         array(
2163                                                 'lim' => 1,
2164                                                 'showIfEmpty' => false,
2165                                                 'msgKey' => array(
2166                                                         'blocked-notice-logextract',
2167                                                         $user->getName() # Support GENDER in notice
2168                                                 )
2169                                         )
2170                                 );
2171                         }
2172                 }
2173                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2174                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2175                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2176                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2177                         ) );
2178                         if ( $wgUser->isLoggedIn() ) {
2179                                 $wgOut->wrapWikiMsg(
2180                                         // Suppress the external link icon, consider the help url an internal one
2181                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2182                                         array(
2183                                                 'newarticletext',
2184                                                 $helpLink
2185                                         )
2186                                 );
2187                         } else {
2188                                 $wgOut->wrapWikiMsg(
2189                                         // Suppress the external link icon, consider the help url an internal one
2190                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2191                                         array(
2192                                                 'newarticletextanon',
2193                                                 $helpLink
2194                                         )
2195                                 );
2196                         }
2197                 }
2198                 # Give a notice if the user is editing a deleted/moved page...
2199                 if ( !$this->mTitle->exists() ) {
2200                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2201                                 '',
2202                                 array(
2203                                         'lim' => 10,
2204                                         'conds' => array( "log_action != 'revision'" ),
2205                                         'showIfEmpty' => false,
2206                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2207                                 )
2208                         );
2209                 }
2210         }
2211
2212         /**
2213          * Attempt to show a custom editing introduction, if supplied
2214          *
2215          * @return bool
2216          */
2217         protected function showCustomIntro() {
2218                 if ( $this->editintro ) {
2219                         $title = Title::newFromText( $this->editintro );
2220                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2221                                 global $wgOut;
2222                                 // Added using template syntax, to take <noinclude>'s into account.
2223                                 $wgOut->addWikiTextTitleTidy(
2224                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2225                                         $this->mTitle
2226                                 );
2227                                 return true;
2228                         }
2229                 }
2230                 return false;
2231         }
2232
2233         /**
2234          * Gets an editable textual representation of $content.
2235          * The textual representation can be turned by into a Content object by the
2236          * toEditContent() method.
2237          *
2238          * If $content is null or false or a string, $content is returned unchanged.
2239          *
2240          * If the given Content object is not of a type that can be edited using
2241          * the text base EditPage, an exception will be raised. Set
2242          * $this->allowNonTextContent to true to allow editing of non-textual
2243          * content.
2244          *
2245          * @param Content|null|bool|string $content
2246          * @return string The editable text form of the content.
2247          *
2248          * @throws MWException If $content is not an instance of TextContent and
2249          *   $this->allowNonTextContent is not true.
2250          */
2251         protected function toEditText( $content ) {
2252                 if ( $content === null || $content === false || is_string( $content ) ) {
2253                         return $content;
2254                 }
2255
2256                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2257                         throw new MWException( 'This content model is not supported: '
2258                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2259                 }
2260
2261                 return $content->serialize( $this->contentFormat );
2262         }
2263
2264         /**
2265          * Turns the given text into a Content object by unserializing it.
2266          *
2267          * If the resulting Content object is not of a type that can be edited using
2268          * the text base EditPage, an exception will be raised. Set
2269          * $this->allowNonTextContent to true to allow editing of non-textual
2270          * content.
2271          *
2272          * @param string|null|bool $text Text to unserialize
2273          * @return Content The content object created from $text. If $text was false
2274          *   or null, false resp. null will be  returned instead.
2275          *
2276          * @throws MWException If unserializing the text results in a Content
2277          *   object that is not an instance of TextContent and
2278          *   $this->allowNonTextContent is not true.
2279          */
2280         protected function toEditContent( $text ) {
2281                 if ( $text === false || $text === null ) {
2282                         return $text;
2283                 }
2284
2285                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2286                         $this->contentModel, $this->contentFormat );
2287
2288                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2289                         throw new MWException( 'This content model is not supported: '
2290                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2291                 }
2292
2293                 return $content;
2294         }
2295
2296         /**
2297          * Send the edit form and related headers to $wgOut
2298          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2299          *     during form output near the top, for captchas and the like.
2300          *
2301          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2302          * use the EditPage::showEditForm:fields hook instead.
2303          */
2304         function showEditForm( $formCallback = null ) {
2305                 global $wgOut, $wgUser;
2306
2307                 # need to parse the preview early so that we know which templates are used,
2308                 # otherwise users with "show preview after edit box" will get a blank list
2309                 # we parse this near the beginning so that setHeaders can do the title
2310                 # setting work instead of leaving it in getPreviewText
2311                 $previewOutput = '';
2312                 if ( $this->formtype == 'preview' ) {
2313                         $previewOutput = $this->getPreviewText();
2314                 }
2315
2316                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2317
2318                 $this->setHeaders();
2319
2320                 if ( $this->showHeader() === false ) {
2321                         return;
2322                 }
2323
2324                 $wgOut->addHTML( $this->editFormPageTop );
2325
2326                 if ( $wgUser->getOption( 'previewontop' ) ) {
2327                         $this->displayPreviewArea( $previewOutput, true );
2328                 }
2329
2330                 $wgOut->addHTML( $this->editFormTextTop );
2331
2332                 $showToolbar = true;
2333                 if ( $this->wasDeletedSinceLastEdit() ) {
2334                         if ( $this->formtype == 'save' ) {
2335                                 // Hide the toolbar and edit area, user can click preview to get it back
2336                                 // Add an confirmation checkbox and explanation.
2337                                 $showToolbar = false;
2338                         } else {
2339                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2340                                         'deletedwhileediting' );
2341                         }
2342                 }
2343
2344                 // @todo add EditForm plugin interface and use it here!
2345                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2346                 $wgOut->addHTML( Html::openElement(
2347                         'form',
2348                         array(
2349                                 'id' => self::EDITFORM_ID,
2350                                 'name' => self::EDITFORM_ID,
2351                                 'method' => 'post',
2352                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2353                                 'enctype' => 'multipart/form-data'
2354                         )
2355                 ) );
2356
2357                 if ( is_callable( $formCallback ) ) {
2358                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2359                         call_user_func_array( $formCallback, array( &$wgOut ) );
2360                 }
2361
2362                 // Add an empty field to trip up spambots
2363                 $wgOut->addHTML(
2364                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2365                         . Html::rawElement(
2366                                 'label',
2367                                 array( 'for' => 'wpAntiSpam' ),
2368                                 wfMessage( 'simpleantispam-label' )->parse()
2369                         )
2370                         . Xml::element(
2371                                 'input',
2372                                 array(
2373                                         'type' => 'text',
2374                                         'name' => 'wpAntispam',
2375                                         'id' => 'wpAntispam',
2376                                         'value' => ''
2377                                 )
2378                         )
2379                         . Xml::closeElement( 'div' )
2380                 );
2381
2382                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2383
2384                 // Put these up at the top to ensure they aren't lost on early form submission
2385                 $this->showFormBeforeText();
2386
2387                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2388                         $username = $this->lastDelete->user_name;
2389                         $comment = $this->lastDelete->log_comment;
2390
2391                         // It is better to not parse the comment at all than to have templates expanded in the middle
2392                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2393                         $key = $comment === ''
2394                                 ? 'confirmrecreate-noreason'
2395                                 : 'confirmrecreate';
2396                         $wgOut->addHTML(
2397                                 '<div class="mw-confirm-recreate">' .
2398                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2399                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2400                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2401                                 ) .
2402                                 '</div>'
2403                         );
2404                 }
2405
2406                 # When the summary is hidden, also hide them on preview/show changes
2407                 if ( $this->nosummary ) {
2408                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2409                 }
2410
2411                 # If a blank edit summary was previously provided, and the appropriate
2412                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2413                 # user being bounced back more than once in the event that a summary
2414                 # is not required.
2415                 #####
2416                 # For a bit more sophisticated detection of blank summaries, hash the
2417                 # automatic one and pass that in the hidden field wpAutoSummary.
2418                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2419                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2420                 }
2421
2422                 if ( $this->undidRev ) {
2423                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2424                 }
2425
2426                 if ( $this->selfRedirect ) {
2427                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2428                 }
2429
2430                 if ( $this->hasPresetSummary ) {
2431                         // If a summary has been preset using &summary= we don't want to prompt for
2432                         // a different summary. Only prompt for a summary if the summary is blanked.
2433                         // (Bug 17416)
2434                         $this->autoSumm = md5( '' );
2435                 }
2436
2437                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2438                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2439
2440                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2441                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2442                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2443
2444                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2445                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2446
2447                 if ( $this->section == 'new' ) {
2448                         $this->showSummaryInput( true, $this->summary );
2449                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2450                 }
2451
2452                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2453
2454                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2455                         $wgOut->addHTML( EditPage::getEditToolbar() );
2456                 }
2457
2458                 if ( $this->blankArticle ) {
2459                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2460                 }
2461
2462                 if ( $this->isConflict ) {
2463                         // In an edit conflict bypass the overridable content form method
2464                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2465                         // resolved between page source edits and custom ui edits using the
2466                         // custom edit ui.
2467                         $this->textbox2 = $this->textbox1;
2468
2469                         $content = $this->getCurrentContent();
2470                         $this->textbox1 = $this->toEditText( $content );
2471
2472                         $this->showTextbox1();
2473                 } else {
2474                         $this->showContentForm();
2475                 }
2476
2477                 $wgOut->addHTML( $this->editFormTextAfterContent );
2478
2479                 $this->showStandardInputs();
2480
2481                 $this->showFormAfterText();
2482
2483                 $this->showTosSummary();
2484
2485                 $this->showEditTools();
2486
2487                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2488
2489                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2490                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2491
2492                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2493                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2494
2495                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2496                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2497
2498                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2499
2500                 if ( $this->isConflict ) {
2501                         try {
2502                                 $this->showConflict();
2503                         } catch ( MWContentSerializationException $ex ) {
2504                                 // this can't really happen, but be nice if it does.
2505                                 $msg = wfMessage(
2506                                         'content-failed-to-parse',
2507                                         $this->contentModel,
2508                                         $this->contentFormat,
2509                                         $ex->getMessage()
2510                                 );
2511                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2512                         }
2513                 }
2514
2515                 // Marker for detecting truncated form data.  This must be the last
2516                 // parameter sent in order to be of use, so do not move me.
2517                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2518                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2519
2520                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2521                         $this->displayPreviewArea( $previewOutput, false );
2522                 }
2523
2524         }
2525
2526         /**
2527          * Extract the section title from current section text, if any.
2528          *
2529          * @param string $text
2530          * @return string|bool String or false
2531          */
2532         public static function extractSectionTitle( $text ) {
2533                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2534                 if ( !empty( $matches[2] ) ) {
2535                         global $wgParser;
2536                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2537                 } else {
2538                         return false;
2539                 }
2540         }
2541
2542         /**
2543          * @return bool
2544          */
2545         protected function showHeader() {
2546                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2547                 global $wgAllowUserCss, $wgAllowUserJs;
2548
2549                 if ( $this->mTitle->isTalkPage() ) {
2550                         $wgOut->addWikiMsg( 'talkpagetext' );
2551                 }
2552
2553                 // Add edit notices
2554                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2555
2556                 if ( $this->isConflict ) {
2557                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2558                         $this->edittime = $this->mArticle->getTimestamp();
2559                 } else {
2560                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2561                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2562                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2563                                 // Someone is welcome to try refactoring though
2564                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2565                                 return false;
2566                         }
2567
2568                         if ( $this->section != '' && $this->section != 'new' ) {
2569                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2570                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2571                                         if ( $sectionTitle !== false ) {
2572                                                 $this->summary = "/* $sectionTitle */ ";
2573                                         }
2574                                 }
2575                         }
2576
2577                         if ( $this->missingComment ) {
2578                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2579                         }
2580
2581                         if ( $this->missingSummary && $this->section != 'new' ) {
2582                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2583                         }
2584
2585                         if ( $this->missingSummary && $this->section == 'new' ) {
2586                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2587                         }
2588
2589                         if ( $this->blankArticle ) {
2590                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2591                         }
2592
2593                         if ( $this->selfRedirect ) {
2594                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2595                         }
2596
2597                         if ( $this->hookError !== '' ) {
2598                                 $wgOut->addWikiText( $this->hookError );
2599                         }
2600
2601                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2602                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2603                         }
2604
2605                         if ( $this->section != 'new' ) {
2606                                 $revision = $this->mArticle->getRevisionFetched();
2607                                 if ( $revision ) {
2608                                         // Let sysop know that this will make private content public if saved
2609
2610                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2611                                                 $wgOut->wrapWikiMsg(
2612                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2613                                                         'rev-deleted-text-permission'
2614                                                 );
2615                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2616                                                 $wgOut->wrapWikiMsg(
2617                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2618                                                         'rev-deleted-text-view'
2619                                                 );
2620                                         }
2621
2622                                         if ( !$revision->isCurrent() ) {
2623                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2624                                                 $wgOut->addWikiMsg( 'editingold' );
2625                                         }
2626                                 } elseif ( $this->mTitle->exists() ) {
2627                                         // Something went wrong
2628
2629                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2630                                                 array( 'missing-revision', $this->oldid ) );
2631                                 }
2632                         }
2633                 }
2634
2635                 if ( wfReadOnly() ) {
2636                         $wgOut->wrapWikiMsg(
2637                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2638                                 array( 'readonlywarning', wfReadOnlyReason() )
2639                         );
2640                 } elseif ( $wgUser->isAnon() ) {
2641                         if ( $this->formtype != 'preview' ) {
2642                                 $wgOut->wrapWikiMsg(
2643                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2644                                         array( 'anoneditwarning',
2645                                                 // Log-in link
2646                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2647                                                 // Sign-up link
2648                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2649                                 );
2650                         } else {
2651                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2652                                         'anonpreviewwarning'
2653                                 );
2654                         }
2655                 } else {
2656                         if ( $this->isCssJsSubpage ) {
2657                                 # Check the skin exists
2658                                 if ( $this->isWrongCaseCssJsPage ) {
2659                                         $wgOut->wrapWikiMsg(
2660                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2661                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2662                                         );
2663                                 }
2664                                 if ( $this->formtype !== 'preview' ) {
2665                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2666                                                 $wgOut->wrapWikiMsg(
2667                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2668                                                         array( 'usercssyoucanpreview' )
2669                                                 );
2670                                         }
2671
2672                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2673                                                 $wgOut->wrapWikiMsg(
2674                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2675                                                         array( 'userjsyoucanpreview' )
2676                                                 );
2677                                         }
2678                                 }
2679                         }
2680                 }
2681
2682                 if ( $this->mTitle->isProtected( 'edit' ) &&
2683                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2684                 ) {
2685                         # Is the title semi-protected?
2686                         if ( $this->mTitle->isSemiProtected() ) {
2687                                 $noticeMsg = 'semiprotectedpagewarning';
2688                         } else {
2689                                 # Then it must be protected based on static groups (regular)
2690                                 $noticeMsg = 'protectedpagewarning';
2691                         }
2692                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2693                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2694                 }
2695                 if ( $this->mTitle->isCascadeProtected() ) {
2696                         # Is this page under cascading protection from some source pages?
2697                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2698                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2699                         $cascadeSourcesCount = count( $cascadeSources );
2700                         if ( $cascadeSourcesCount > 0 ) {
2701                                 # Explain, and list the titles responsible
2702                                 foreach ( $cascadeSources as $page ) {
2703                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2704                                 }
2705                         }
2706                         $notice .= '</div>';
2707                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2708                 }
2709                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2710                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2711                                 array( 'lim' => 1,
2712                                         'showIfEmpty' => false,
2713                                         'msgKey' => array( 'titleprotectedwarning' ),
2714                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2715                 }
2716
2717                 if ( $this->kblength === false ) {
2718                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2719                 }
2720
2721                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2722                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2723                                 array(
2724                                         'longpageerror',
2725                                         $wgLang->formatNum( $this->kblength ),
2726                                         $wgLang->formatNum( $wgMaxArticleSize )
2727                                 )
2728                         );
2729                 } else {
2730                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2731                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2732                                         array(
2733                                                 'longpage-hint',
2734                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2735                                                 strlen( $this->textbox1 )
2736                                         )
2737                                 );
2738                         }
2739                 }
2740                 # Add header copyright warning
2741                 $this->showHeaderCopyrightWarning();
2742
2743                 return true;
2744         }
2745
2746         /**
2747          * Standard summary input and label (wgSummary), abstracted so EditPage
2748          * subclasses may reorganize the form.
2749          * Note that you do not need to worry about the label's for=, it will be
2750          * inferred by the id given to the input. You can remove them both by
2751          * passing array( 'id' => false ) to $userInputAttrs.
2752          *
2753          * @param string $summary The value of the summary input
2754          * @param string $labelText The html to place inside the label
2755          * @param array $inputAttrs Array of attrs to use on the input
2756          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2757          *
2758          * @return array An array in the format array( $label, $input )
2759          */
2760         function getSummaryInput( $summary = "", $labelText = null,
2761                 $inputAttrs = null, $spanLabelAttrs = null
2762         ) {
2763                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2764                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2765                         'id' => 'wpSummary',
2766                         'maxlength' => '200',
2767                         'tabindex' => '1',
2768                         'size' => 60,
2769                         'spellcheck' => 'true',
2770                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2771
2772                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2773                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2774                         'id' => "wpSummaryLabel"
2775                 );
2776
2777                 $label = null;
2778                 if ( $labelText ) {
2779                         $label = Xml::tags(
2780                                 'label',
2781                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2782                                 $labelText
2783                         );
2784                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2785                 }
2786
2787                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2788
2789                 return array( $label, $input );
2790         }
2791
2792         /**
2793          * @param bool $isSubjectPreview True if this is the section subject/title
2794          *   up top, or false if this is the comment summary
2795          *   down below the textarea
2796          * @param string $summary The text of the summary to display
2797          */
2798         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2799                 global $wgOut, $wgContLang;
2800                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2801                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2802                 if ( $isSubjectPreview ) {
2803                         if ( $this->nosummary ) {
2804                                 return;
2805                         }
2806                 } else {
2807                         if ( !$this->mShowSummaryField ) {
2808                                 return;
2809                         }
2810                 }
2811                 $summary = $wgContLang->recodeForEdit( $summary );
2812                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2813                 list( $label, $input ) = $this->getSummaryInput(
2814                         $summary,
2815                         $labelText,
2816                         array( 'class' => $summaryClass ),
2817                         array()
2818                 );
2819                 $wgOut->addHTML( "{$label} {$input}" );
2820         }
2821
2822         /**
2823          * @param bool $isSubjectPreview True if this is the section subject/title
2824          *   up top, or false if this is the comment summary
2825          *   down below the textarea
2826          * @param string $summary The text of the summary to display
2827          * @return string
2828          */
2829         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2830                 // avoid spaces in preview, gets always trimmed on save
2831                 $summary = trim( $summary );
2832                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2833                         return "";
2834                 }
2835
2836                 global $wgParser;
2837
2838                 if ( $isSubjectPreview ) {
2839                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2840                                 ->inContentLanguage()->text();
2841                 }
2842
2843                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2844
2845                 $summary = wfMessage( $message )->parse()
2846                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2847                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2848         }
2849
2850         protected function showFormBeforeText() {
2851                 global $wgOut;
2852                 $section = htmlspecialchars( $this->section );
2853                 $wgOut->addHTML( <<<HTML
2854 <input type='hidden' value="{$section}" name="wpSection"/>
2855 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2856 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2857 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2858
2859 HTML
2860                 );
2861                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2862                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2863                 }
2864         }
2865
2866         protected function showFormAfterText() {
2867                 global $wgOut, $wgUser;
2868                 /**
2869                  * To make it harder for someone to slip a user a page
2870                  * which submits an edit form to the wiki without their
2871                  * knowledge, a random token is associated with the login
2872                  * session. If it's not passed back with the submission,
2873                  * we won't save the page, or render user JavaScript and
2874                  * CSS previews.
2875                  *
2876                  * For anon editors, who may not have a session, we just
2877                  * include the constant suffix to prevent editing from
2878                  * broken text-mangling proxies.
2879                  */
2880                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2881         }
2882
2883         /**
2884          * Subpage overridable method for printing the form for page content editing
2885          * By default this simply outputs wpTextbox1
2886          * Subclasses can override this to provide a custom UI for editing;
2887          * be it a form, or simply wpTextbox1 with a modified content that will be
2888          * reverse modified when extracted from the post data.
2889          * Note that this is basically the inverse for importContentFormData
2890          */
2891         protected function showContentForm() {
2892                 $this->showTextbox1();
2893         }
2894
2895         /**
2896          * Method to output wpTextbox1
2897          * The $textoverride method can be used by subclasses overriding showContentForm
2898          * to pass back to this method.
2899          *
2900          * @param array $customAttribs Array of html attributes to use in the textarea
2901          * @param string $textoverride Optional text to override $this->textarea1 with
2902          */
2903         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2904                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2905                         $attribs = array( 'style' => 'display:none;' );
2906                 } else {
2907                         $classes = array(); // Textarea CSS
2908                         if ( $this->mTitle->isProtected( 'edit' ) &&
2909                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2910                         ) {
2911                                 # Is the title semi-protected?
2912                                 if ( $this->mTitle->isSemiProtected() ) {
2913                                         $classes[] = 'mw-textarea-sprotected';
2914                                 } else {
2915                                         # Then it must be protected based on static groups (regular)
2916                                         $classes[] = 'mw-textarea-protected';
2917                                 }
2918                                 # Is the title cascade-protected?
2919                                 if ( $this->mTitle->isCascadeProtected() ) {
2920                                         $classes[] = 'mw-textarea-cprotected';
2921                                 }
2922                         }
2923
2924                         $attribs = array( 'tabindex' => 1 );
2925
2926                         if ( is_array( $customAttribs ) ) {
2927                                 $attribs += $customAttribs;
2928                         }
2929
2930                         if ( count( $classes ) ) {
2931                                 if ( isset( $attribs['class'] ) ) {
2932                                         $classes[] = $attribs['class'];
2933                                 }
2934                                 $attribs['class'] = implode( ' ', $classes );
2935                         }
2936                 }
2937
2938                 $this->showTextbox(
2939                         $textoverride !== null ? $textoverride : $this->textbox1,
2940                         'wpTextbox1',
2941                         $attribs
2942                 );
2943         }
2944
2945         protected function showTextbox2() {
2946                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2947         }
2948
2949         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2950                 global $wgOut, $wgUser;
2951
2952                 $wikitext = $this->safeUnicodeOutput( $text );
2953                 if ( strval( $wikitext ) !== '' ) {
2954                         // Ensure there's a newline at the end, otherwise adding lines
2955                         // is awkward.
2956                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2957                         // mode will show an extra newline. A bit annoying.
2958                         $wikitext .= "\n";
2959                 }
2960
2961                 $attribs = $customAttribs + array(
2962                         'accesskey' => ',',
2963                         'id' => $name,
2964                         'cols' => $wgUser->getIntOption( 'cols' ),
2965                         'rows' => $wgUser->getIntOption( 'rows' ),
2966                         // Avoid PHP notices when appending preferences
2967                         // (appending allows customAttribs['style'] to still work).
2968                         'style' => ''
2969                 );
2970
2971                 $pageLang = $this->mTitle->getPageLanguage();
2972                 $attribs['lang'] = $pageLang->getHtmlCode();
2973                 $attribs['dir'] = $pageLang->getDir();
2974
2975                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2976         }
2977
2978         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2979                 global $wgOut;
2980                 $classes = array();
2981                 if ( $isOnTop ) {
2982                         $classes[] = 'ontop';
2983                 }
2984
2985                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2986
2987                 if ( $this->formtype != 'preview' ) {
2988                         $attribs['style'] = 'display: none;';
2989                 }
2990
2991                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2992
2993                 if ( $this->formtype == 'preview' ) {
2994                         $this->showPreview( $previewOutput );
2995                 }
2996
2997                 $wgOut->addHTML( '</div>' );
2998
2999                 if ( $this->formtype == 'diff' ) {
3000                         try {
3001                                 $this->showDiff();
3002                         } catch ( MWContentSerializationException $ex ) {
3003                                 $msg = wfMessage(
3004                                         'content-failed-to-parse',
3005                                         $this->contentModel,
3006                                         $this->contentFormat,
3007                                         $ex->getMessage()
3008                                 );
3009                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3010                         }
3011                 }
3012         }
3013
3014         /**
3015          * Append preview output to $wgOut.
3016          * Includes category rendering if this is a category page.
3017          *
3018          * @param string $text The HTML to be output for the preview.
3019          */
3020         protected function showPreview( $text ) {
3021                 global $wgOut;
3022                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3023                         $this->mArticle->openShowCategory();
3024                 }
3025                 # This hook seems slightly odd here, but makes things more
3026                 # consistent for extensions.
3027                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3028                 $wgOut->addHTML( $text );
3029                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3030                         $this->mArticle->closeShowCategory();
3031                 }
3032         }
3033
3034         /**
3035          * Get a diff between the current contents of the edit box and the
3036          * version of the page we're editing from.
3037          *
3038          * If this is a section edit, we'll replace the section as for final
3039          * save and then make a comparison.
3040          */
3041         function showDiff() {
3042                 global $wgUser, $wgContLang, $wgOut;
3043
3044                 $oldtitlemsg = 'currentrev';
3045                 # if message does not exist, show diff against the preloaded default
3046                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3047                         $oldtext = $this->mTitle->getDefaultMessageText();
3048                         if ( $oldtext !== false ) {
3049                                 $oldtitlemsg = 'defaultmessagetext';
3050                                 $oldContent = $this->toEditContent( $oldtext );
3051                         } else {
3052                                 $oldContent = null;
3053                         }
3054                 } else {
3055                         $oldContent = $this->getCurrentContent();
3056                 }
3057
3058                 $textboxContent = $this->toEditContent( $this->textbox1 );
3059
3060                 $newContent = $this->mArticle->replaceSectionContent(
3061                                                         $this->section, $textboxContent,
3062                                                         $this->summary, $this->edittime );
3063
3064                 if ( $newContent ) {
3065                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3066                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3067
3068                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3069                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3070                 }
3071
3072                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3073                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3074                         $newtitle = wfMessage( 'yourtext' )->parse();
3075
3076                         if ( !$oldContent ) {
3077                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3078                         }
3079
3080                         if ( !$newContent ) {
3081                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3082                         }
3083
3084                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3085                         $de->setContent( $oldContent, $newContent );
3086
3087                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3088                         $de->showDiffStyle();
3089                 } else {
3090                         $difftext = '';
3091                 }
3092
3093                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3094         }
3095
3096         /**
3097          * Show the header copyright warning.
3098          */
3099         protected function showHeaderCopyrightWarning() {
3100                 $msg = 'editpage-head-copy-warn';
3101                 if ( !wfMessage( $msg )->isDisabled() ) {
3102                         global $wgOut;
3103                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3104                                 'editpage-head-copy-warn' );
3105                 }
3106         }
3107
3108         /**
3109          * Give a chance for site and per-namespace customizations of
3110          * terms of service summary link that might exist separately
3111          * from the copyright notice.
3112          *
3113          * This will display between the save button and the edit tools,
3114          * so should remain short!
3115          */
3116         protected function showTosSummary() {
3117                 $msg = 'editpage-tos-summary';
3118                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3119                 if ( !wfMessage( $msg )->isDisabled() ) {
3120                         global $wgOut;
3121                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3122                         $wgOut->addWikiMsg( $msg );
3123                         $wgOut->addHTML( '</div>' );
3124                 }
3125         }
3126
3127         protected function showEditTools() {
3128                 global $wgOut;
3129                 $wgOut->addHTML( '<div class="mw-editTools">' .
3130                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3131                         '</div>' );
3132         }
3133
3134         /**
3135          * Get the copyright warning
3136          *
3137          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3138          * @return string
3139          */
3140         protected function getCopywarn() {
3141                 return self::getCopyrightWarning( $this->mTitle );
3142         }
3143
3144         /**
3145          * Get the copyright warning, by default returns wikitext
3146          *
3147          * @param Title $title
3148          * @param string $format Output format, valid values are any function of a Message object
3149          * @return string
3150          */
3151         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3152                 global $wgRightsText;
3153                 if ( $wgRightsText ) {
3154                         $copywarnMsg = array( 'copyrightwarning',
3155                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3156                                 $wgRightsText );
3157                 } else {
3158                         $copywarnMsg = array( 'copyrightwarning2',
3159                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3160                 }
3161                 // Allow for site and per-namespace customization of contribution/copyright notice.
3162                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3163
3164                 return "<div id=\"editpage-copywarn\">\n" .
3165                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3166         }
3167
3168         /**
3169          * Get the Limit report for page previews
3170          *
3171          * @since 1.22
3172          * @param ParserOutput $output ParserOutput object from the parse
3173          * @return string HTML
3174          */
3175         public static function getPreviewLimitReport( $output ) {
3176                 if ( !$output || !$output->getLimitReportData() ) {
3177                         return '';
3178                 }
3179
3180                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3181                         wfMessage( 'limitreport-title' )->parseAsBlock()
3182                 );
3183
3184                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3185                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3186
3187                 $limitReport .= Html::openElement( 'table', array(
3188                         'class' => 'preview-limit-report wikitable'
3189                 ) ) .
3190                         Html::openElement( 'tbody' );
3191
3192                 foreach ( $output->getLimitReportData() as $key => $value ) {
3193                         if ( Hooks::run( 'ParserLimitReportFormat',
3194                                 array( $key, &$value, &$limitReport, true, true )
3195                         ) ) {
3196                                 $keyMsg = wfMessage( $key );
3197                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3198                                 if ( !$valueMsg->exists() ) {
3199                                         $valueMsg = new RawMessage( '$1' );
3200                                 }
3201                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3202                                         $limitReport .= Html::openElement( 'tr' ) .
3203                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3204                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3205                                                 Html::closeElement( 'tr' );
3206                                 }
3207                         }
3208                 }
3209
3210                 $limitReport .= Html::closeElement( 'tbody' ) .
3211                         Html::closeElement( 'table' ) .
3212                         Html::closeElement( 'div' );
3213
3214                 return $limitReport;
3215         }
3216
3217         protected function showStandardInputs( &$tabindex = 2 ) {
3218                 global $wgOut;
3219                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3220
3221                 if ( $this->section != 'new' ) {
3222                         $this->showSummaryInput( false, $this->summary );
3223                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3224                 }
3225
3226                 $checkboxes = $this->getCheckboxes( $tabindex,
3227                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3228                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3229
3230                 // Show copyright warning.
3231                 $wgOut->addWikiText( $this->getCopywarn() );
3232                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3233
3234                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3235                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3236
3237                 $cancel = $this->getCancelLink();
3238                 if ( $cancel !== '' ) {
3239                         $cancel .= Html::element( 'span',
3240                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3241                                 wfMessage( 'pipe-separator' )->text() );
3242                 }
3243
3244                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3245                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3246                 $attrs = array(
3247                         'target' => 'helpwindow',
3248                         'href' => $edithelpurl,
3249                 );
3250                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3251                         $attrs, array( 'mw-ui-quiet' ) ) .
3252                         wfMessage( 'word-separator' )->escaped() .
3253                         wfMessage( 'newwindow' )->parse();
3254
3255                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3256                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3257                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3258
3259                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3260
3261                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3262         }
3263
3264         /**
3265          * Show an edit conflict. textbox1 is already shown in showEditForm().
3266          * If you want to use another entry point to this function, be careful.
3267          */
3268         protected function showConflict() {
3269                 global $wgOut;
3270
3271                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3272                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3273
3274                         $content1 = $this->toEditContent( $this->textbox1 );
3275                         $content2 = $this->toEditContent( $this->textbox2 );
3276
3277                         $handler = ContentHandler::getForModelID( $this->contentModel );
3278                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3279                         $de->setContent( $content2, $content1 );
3280                         $de->showDiff(
3281                                 wfMessage( 'yourtext' )->parse(),
3282                                 wfMessage( 'storedversion' )->text()
3283                         );
3284
3285                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3286                         $this->showTextbox2();
3287                 }
3288         }
3289
3290         /**
3291          * @return string
3292          */
3293         public function getCancelLink() {
3294                 $cancelParams = array();
3295                 if ( !$this->isConflict && $this->oldid > 0 ) {
3296                         $cancelParams['oldid'] = $this->oldid;
3297                 }
3298                 $attrs = array( 'id' => 'mw-editform-cancel' );
3299
3300                 return Linker::linkKnown(
3301                         $this->getContextTitle(),
3302                         wfMessage( 'cancel' )->parse(),
3303                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3304                         $cancelParams
3305                 );
3306         }
3307
3308         /**
3309          * Returns the URL to use in the form's action attribute.
3310          * This is used by EditPage subclasses when simply customizing the action
3311          * variable in the constructor is not enough. This can be used when the
3312          * EditPage lives inside of a Special page rather than a custom page action.
3313          *
3314          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3315          * @return string
3316          */
3317         protected function getActionURL( Title $title ) {
3318                 return $title->getLocalURL( array( 'action' => $this->action ) );
3319         }
3320
3321         /**
3322          * Check if a page was deleted while the user was editing it, before submit.
3323          * Note that we rely on the logging table, which hasn't been always there,
3324          * but that doesn't matter, because this only applies to brand new
3325          * deletes.
3326          * @return bool
3327          */
3328         protected function wasDeletedSinceLastEdit() {
3329                 if ( $this->deletedSinceEdit !== null ) {
3330                         return $this->deletedSinceEdit;
3331                 }
3332
3333                 $this->deletedSinceEdit = false;
3334
3335                 if ( $this->mTitle->isDeletedQuick() ) {
3336                         $this->lastDelete = $this->getLastDelete();
3337                         if ( $this->lastDelete ) {
3338                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3339                                 if ( $deleteTime > $this->starttime ) {
3340                                         $this->deletedSinceEdit = true;
3341                                 }
3342                         }
3343                 }
3344
3345                 return $this->deletedSinceEdit;
3346         }
3347
3348         /**
3349          * @return bool|stdClass
3350          */
3351         protected function getLastDelete() {
3352                 $dbr = wfGetDB( DB_SLAVE );
3353                 $data = $dbr->selectRow(
3354                         array( 'logging', 'user' ),
3355                         array(
3356                                 'log_type',
3357                                 'log_action',
3358                                 'log_timestamp',
3359                                 'log_user',
3360                                 'log_namespace',
3361                                 'log_title',
3362                                 'log_comment',
3363                                 'log_params',
3364                                 'log_deleted',
3365                                 'user_name'
3366                         ), array(
3367                                 'log_namespace' => $this->mTitle->getNamespace(),
3368                                 'log_title' => $this->mTitle->getDBkey(),
3369                                 'log_type' => 'delete',
3370                                 'log_action' => 'delete',
3371                                 'user_id=log_user'
3372                         ),
3373                         __METHOD__,
3374                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3375                 );
3376                 // Quick paranoid permission checks...
3377                 if ( is_object( $data ) ) {
3378                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3379                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3380                         }
3381
3382                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3383                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3384                         }
3385                 }
3386
3387                 return $data;
3388         }
3389
3390         /**
3391          * Get the rendered text for previewing.
3392          * @throws MWException
3393          * @return string
3394          */
3395         function getPreviewText() {
3396                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3397                 global $wgAllowUserCss, $wgAllowUserJs;
3398
3399                 if ( $wgRawHtml && !$this->mTokenOk ) {
3400                         // Could be an offsite preview attempt. This is very unsafe if
3401                         // HTML is enabled, as it could be an attack.
3402                         $parsedNote = '';
3403                         if ( $this->textbox1 !== '' ) {
3404                                 // Do not put big scary notice, if previewing the empty
3405                                 // string, which happens when you initially edit
3406                                 // a category page, due to automatic preview-on-open.
3407                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3408                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3409                         }
3410                         return $parsedNote;
3411                 }
3412
3413                 $note = '';
3414
3415                 try {
3416                         $content = $this->toEditContent( $this->textbox1 );
3417
3418                         $previewHTML = '';
3419                         if ( !Hooks::run(
3420                                 'AlternateEditPreview',
3421                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3422                         ) {
3423                                 return $previewHTML;
3424                         }
3425
3426                         # provide a anchor link to the editform
3427                         $continueEditing = '<span class="mw-continue-editing">' .
3428                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3429                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3430                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3431                                 if ( $this->mTokenOkExceptSuffix ) {
3432                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3433                                 } else {
3434                                         $note = wfMessage( 'session_fail_preview' )->plain();
3435                                 }
3436                         } elseif ( $this->incompleteForm ) {
3437                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3438                         } else {
3439                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3440                         }
3441
3442                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3443                         $parserOptions->setIsPreview( true );
3444                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3445
3446                         # don't parse non-wikitext pages, show message about preview
3447                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3448                                 if ( $this->mTitle->isCssJsSubpage() ) {
3449                                         $level = 'user';
3450                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3451                                         $level = 'site';
3452                                 } else {
3453                                         $level = false;
3454                                 }
3455
3456                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3457                                         $format = 'css';
3458                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3459                                                 $format = false;
3460                                         }
3461                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3462                                         $format = 'js';
3463                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3464                                                 $format = false;
3465                                         }
3466                                 } else {
3467                                         $format = false;
3468                                 }
3469
3470                                 # Used messages to make sure grep find them:
3471                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3472                                 if ( $level && $format ) {
3473                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3474                                                 wfMessage( "{$level}{$format}preview" )->text() .
3475                                                 ' ' . $continueEditing . "</div>";
3476                                 }
3477                         }
3478
3479                         # If we're adding a comment, we need to show the
3480                         # summary as the headline
3481                         if ( $this->section === "new" && $this->summary !== "" ) {
3482                                 $content = $content->addSectionHeader( $this->summary );
3483                         }
3484
3485                         $hook_args = array( $this, &$content );
3486                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3487                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3488
3489                         $parserOptions->enableLimitReport();
3490
3491                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3492                         # But it's now deprecated, so never mind
3493
3494                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3495                         $scopedCallback = $parserOptions->setupFakeRevision(
3496                                 $this->mTitle, $pstContent, $wgUser );
3497                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3498
3499                         # Try to stash the edit for the final submission step
3500                         # @todo: different date format preferences cause cache misses
3501                         ApiStashEdit::stashEditFromPreview(
3502                                 $this->getArticle(), $content, $pstContent,
3503                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3504                         );
3505
3506                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3507                         $previewHTML = $parserOutput->getText();
3508                         $this->mParserOutput = $parserOutput;
3509                         $wgOut->addParserOutputMetadata( $parserOutput );
3510
3511                         if ( count( $parserOutput->getWarnings() ) ) {
3512                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3513                         }
3514                 } catch ( MWContentSerializationException $ex ) {
3515                         $m = wfMessage(
3516                                 'content-failed-to-parse',
3517                                 $this->contentModel,
3518                                 $this->contentFormat,
3519                                 $ex->getMessage()
3520                         );
3521                         $note .= "\n\n" . $m->parse();
3522                         $previewHTML = '';
3523                 }
3524
3525                 if ( $this->isConflict ) {
3526                         $conflict = '<h2 id="mw-previewconflict">'
3527                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3528                 } else {
3529                         $conflict = '<hr />';
3530                 }
3531
3532                 $previewhead = "<div class='previewnote'>\n" .
3533                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3534                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3535
3536                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3537                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3538                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3539                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3540
3541                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3542         }
3543
3544         /**
3545          * @return array
3546          */
3547         function getTemplates() {
3548                 if ( $this->preview || $this->section != '' ) {
3549                         $templates = array();
3550                         if ( !isset( $this->mParserOutput ) ) {
3551                                 return $templates;
3552                         }
3553                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3554                                 foreach ( array_keys( $template ) as $dbk ) {
3555                                         $templates[] = Title::makeTitle( $ns, $dbk );
3556                                 }
3557                         }
3558                         return $templates;
3559                 } else {
3560                         return $this->mTitle->getTemplateLinksFrom();
3561                 }
3562         }
3563
3564         /**
3565          * Shows a bulletin board style toolbar for common editing functions.
3566          * It can be disabled in the user preferences.
3567          *
3568          * @return string
3569          */
3570         static function getEditToolbar() {
3571                 global $wgContLang, $wgOut;
3572                 global $wgEnableUploads, $wgForeignFileRepos;
3573
3574                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3575
3576                 /**
3577                  * $toolarray is an array of arrays each of which includes the
3578                  * opening tag, the closing tag, optionally a sample text that is
3579                  * inserted between the two when no selection is highlighted
3580                  * and.  The tip text is shown when the user moves the mouse
3581                  * over the button.
3582                  *
3583                  * Images are defined in ResourceLoaderEditToolbarModule.
3584                  */
3585                 $toolarray = array(
3586                         array(
3587                                 'id'     => 'mw-editbutton-bold',
3588                                 'open'   => '\'\'\'',
3589                                 'close'  => '\'\'\'',
3590                                 'sample' => wfMessage( 'bold_sample' )->text(),
3591                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3592                         ),
3593                         array(
3594                                 'id'     => 'mw-editbutton-italic',
3595                                 'open'   => '\'\'',
3596                                 'close'  => '\'\'',
3597                                 'sample' => wfMessage( 'italic_sample' )->text(),
3598                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3599                         ),
3600                         array(
3601                                 'id'     => 'mw-editbutton-link',
3602                                 'open'   => '[[',
3603                                 'close'  => ']]',
3604                                 'sample' => wfMessage( 'link_sample' )->text(),
3605                                 'tip'    => wfMessage( 'link_tip' )->text(),
3606                         ),
3607                         array(
3608                                 'id'     => 'mw-editbutton-extlink',
3609                                 'open'   => '[',
3610                                 'close'  => ']',
3611                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3612                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3613                         ),
3614                         array(
3615                                 'id'     => 'mw-editbutton-headline',
3616                                 'open'   => "\n== ",
3617                                 'close'  => " ==\n",
3618                                 'sample' => wfMessage( 'headline_sample' )->text(),
3619                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3620                         ),
3621                         $imagesAvailable ? array(
3622                                 'id'     => 'mw-editbutton-image',
3623                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3624                                 'close'  => ']]',
3625                                 'sample' => wfMessage( 'image_sample' )->text(),
3626                                 'tip'    => wfMessage( 'image_tip' )->text(),
3627                         ) : false,
3628                         $imagesAvailable ? array(
3629                                 'id'     => 'mw-editbutton-media',
3630                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3631                                 'close'  => ']]',
3632                                 'sample' => wfMessage( 'media_sample' )->text(),
3633                                 'tip'    => wfMessage( 'media_tip' )->text(),
3634                         ) : false,
3635                         array(
3636                                 'id'     => 'mw-editbutton-nowiki',
3637                                 'open'   => "<nowiki>",
3638                                 'close'  => "</nowiki>",
3639                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3640                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3641                         ),
3642                         array(
3643                                 'id'     => 'mw-editbutton-signature',
3644                                 'open'   => '--~~~~',
3645                                 'close'  => '',
3646                                 'sample' => '',
3647                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3648                         ),
3649                         array(
3650                                 'id'     => 'mw-editbutton-hr',
3651                                 'open'   => "\n----\n",
3652                                 'close'  => '',
3653                                 'sample' => '',
3654                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3655                         )
3656                 );
3657
3658                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3659                 foreach ( $toolarray as $tool ) {
3660                         if ( !$tool ) {
3661                                 continue;
3662                         }
3663
3664                         $params = array(
3665                                 // Images are defined in ResourceLoaderEditToolbarModule
3666                                 false,
3667                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3668                                 // Older browsers show a "speedtip" type message only for ALT.
3669                                 // Ideally these should be different, realistically they
3670                                 // probably don't need to be.
3671                                 $tool['tip'],
3672                                 $tool['open'],
3673                                 $tool['close'],
3674                                 $tool['sample'],
3675                                 $tool['id'],
3676                         );
3677
3678                         $script .= Xml::encodeJsCall(
3679                                 'mw.toolbar.addButton',
3680                                 $params,
3681                                 ResourceLoader::inDebugMode()
3682                         );
3683                 }
3684
3685                 $script .= '});';
3686                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3687
3688                 $toolbar = '<div id="toolbar"></div>';
3689
3690                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3691
3692                 return $toolbar;
3693         }
3694
3695         /**
3696          * Returns an array of html code of the following checkboxes:
3697          * minor and watch
3698          *
3699          * @param int $tabindex Current tabindex
3700          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3701          *                 status of the checkbox
3702          *
3703          * @return array
3704          */
3705         public function getCheckboxes( &$tabindex, $checked ) {
3706                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3707
3708                 $checkboxes = array();
3709
3710                 // don't show the minor edit checkbox if it's a new page or section
3711                 if ( !$this->isNew ) {
3712                         $checkboxes['minor'] = '';
3713                         $minorLabel = wfMessage( 'minoredit' )->parse();
3714                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3715                                 $attribs = array(
3716                                         'tabindex' => ++$tabindex,
3717                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3718                                         'id' => 'wpMinoredit',
3719                                 );
3720                                 $minorEditHtml =
3721                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3722                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3723                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3724                                         ">{$minorLabel}</label>";
3725
3726                                 if ( $wgUseMediaWikiUIEverywhere ) {
3727                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3728                                                 $minorEditHtml .
3729                                         Html::closeElement( 'div' );
3730                                 } else {
3731                                         $checkboxes['minor'] = $minorEditHtml;
3732                                 }
3733                         }
3734                 }
3735
3736                 $watchLabel = wfMessage( 'watchthis' )->parse();
3737                 $checkboxes['watch'] = '';
3738                 if ( $wgUser->isLoggedIn() ) {
3739                         $attribs = array(
3740                                 'tabindex' => ++$tabindex,
3741                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3742                                 'id' => 'wpWatchthis',
3743                         );
3744                         $watchThisHtml =
3745                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3746                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3747                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3748                                 ">{$watchLabel}</label>";
3749                         if ( $wgUseMediaWikiUIEverywhere ) {
3750                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3751                                         $watchThisHtml .
3752                                         Html::closeElement( 'div' );
3753                         } else {
3754                                 $checkboxes['watch'] = $watchThisHtml;
3755                         }
3756                 }
3757                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3758                 return $checkboxes;
3759         }
3760
3761         /**
3762          * Returns an array of html code of the following buttons:
3763          * save, diff, preview and live
3764          *
3765          * @param int $tabindex Current tabindex
3766          *
3767          * @return array
3768          */
3769         public function getEditButtons( &$tabindex ) {
3770                 $buttons = array();
3771
3772                 $attribs = array(
3773                         'id' => 'wpSave',
3774                         'name' => 'wpSave',
3775                         'tabindex' => ++$tabindex,
3776                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3777                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3778                         $attribs, array( 'mw-ui-constructive' ) );
3779
3780                 ++$tabindex; // use the same for preview and live preview
3781                 $attribs = array(
3782                         'id' => 'wpPreview',
3783                         'name' => 'wpPreview',
3784                         'tabindex' => $tabindex,
3785                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3786                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3787                         $attribs );
3788                 $buttons['live'] = '';
3789
3790                 $attribs = array(
3791                         'id' => 'wpDiff',
3792                         'name' => 'wpDiff',
3793                         'tabindex' => ++$tabindex,
3794                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3795                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3796                         $attribs );
3797
3798                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3799                 return $buttons;
3800         }
3801
3802         /**
3803          * Output preview text only. This can be sucked into the edit page
3804          * via JavaScript, and saves the server time rendering the skin as
3805          * well as theoretically being more robust on the client (doesn't
3806          * disturb the edit box's undo history, won't eat your text on
3807          * failure, etc).
3808          *
3809          * @todo This doesn't include category or interlanguage links.
3810          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3811          *       or something...</s>" that might also require more skin
3812          *       initialization, so check whether that's a problem.
3813          */
3814         function livePreview() {
3815                 global $wgOut;
3816                 $wgOut->disable();
3817                 header( 'Content-type: text/xml; charset=utf-8' );
3818                 header( 'Cache-control: no-cache' );
3819
3820                 $previewText = $this->getPreviewText();
3821                 #$categories = $skin->getCategoryLinks();
3822
3823                 $s =
3824                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3825                         Xml::tags( 'livepreview', null,
3826                                 Xml::element( 'preview', null, $previewText )
3827                                 #.      Xml::element( 'category', null, $categories )
3828                         );
3829                 echo $s;
3830         }
3831
3832         /**
3833          * Creates a basic error page which informs the user that
3834          * they have attempted to edit a nonexistent section.
3835          */
3836         function noSuchSectionPage() {
3837                 global $wgOut;
3838
3839                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3840
3841                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3842                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3843                 $wgOut->addHTML( $res );
3844
3845                 $wgOut->returnToMain( false, $this->mTitle );
3846         }
3847
3848         /**
3849          * Show "your edit contains spam" page with your diff and text
3850          *
3851          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3852          */
3853         public function spamPageWithContent( $match = false ) {
3854                 global $wgOut, $wgLang;
3855                 $this->textbox2 = $this->textbox1;
3856
3857                 if ( is_array( $match ) ) {
3858                         $match = $wgLang->listToText( $match );
3859                 }
3860                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3861
3862                 $wgOut->addHTML( '<div id="spamprotected">' );
3863                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3864                 if ( $match ) {
3865                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3866                 }
3867                 $wgOut->addHTML( '</div>' );
3868
3869                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3870                 $this->showDiff();
3871
3872                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3873                 $this->showTextbox2();
3874
3875                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3876         }
3877
3878         /**
3879          * Check if the browser is on a blacklist of user-agents known to
3880          * mangle UTF-8 data on form submission. Returns true if Unicode
3881          * should make it through, false if it's known to be a problem.
3882          * @return bool
3883          */
3884         private function checkUnicodeCompliantBrowser() {
3885                 global $wgBrowserBlackList, $wgRequest;
3886
3887                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3888                 if ( $currentbrowser === false ) {
3889                         // No User-Agent header sent? Trust it by default...
3890                         return true;
3891                 }
3892
3893                 foreach ( $wgBrowserBlackList as $browser ) {
3894                         if ( preg_match( $browser, $currentbrowser ) ) {
3895                                 return false;
3896                         }
3897                 }
3898                 return true;
3899         }
3900
3901         /**
3902          * Filter an input field through a Unicode de-armoring process if it
3903          * came from an old browser with known broken Unicode editing issues.
3904          *
3905          * @param WebRequest $request
3906          * @param string $field
3907          * @return string
3908          */
3909         protected function safeUnicodeInput( $request, $field ) {
3910                 $text = rtrim( $request->getText( $field ) );
3911                 return $request->getBool( 'safemode' )
3912                         ? $this->unmakeSafe( $text )
3913                         : $text;
3914         }
3915
3916         /**
3917          * Filter an output field through a Unicode armoring process if it is
3918          * going to an old browser with known broken Unicode editing issues.
3919          *
3920          * @param string $text
3921          * @return string
3922          */
3923         protected function safeUnicodeOutput( $text ) {
3924                 global $wgContLang;
3925                 $codedText = $wgContLang->recodeForEdit( $text );
3926                 return $this->checkUnicodeCompliantBrowser()
3927                         ? $codedText
3928                         : $this->makeSafe( $codedText );
3929         }
3930
3931         /**
3932          * A number of web browsers are known to corrupt non-ASCII characters
3933          * in a UTF-8 text editing environment. To protect against this,
3934          * detected browsers will be served an armored version of the text,
3935          * with non-ASCII chars converted to numeric HTML character references.
3936          *
3937          * Preexisting such character references will have a 0 added to them
3938          * to ensure that round-trips do not alter the original data.
3939          *
3940          * @param string $invalue
3941          * @return string
3942          */
3943         private function makeSafe( $invalue ) {
3944                 // Armor existing references for reversibility.
3945                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3946
3947                 $bytesleft = 0;
3948                 $result = "";
3949                 $working = 0;
3950                 $valueLength = strlen( $invalue );
3951                 for ( $i = 0; $i < $valueLength; $i++ ) {
3952                         $bytevalue = ord( $invalue[$i] );
3953                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3954                                 $result .= chr( $bytevalue );
3955                                 $bytesleft = 0;
3956                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3957                                 $working = $working << 6;
3958                                 $working += ( $bytevalue & 0x3F );
3959                                 $bytesleft--;
3960                                 if ( $bytesleft <= 0 ) {
3961                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3962                                 }
3963                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3964                                 $working = $bytevalue & 0x1F;
3965                                 $bytesleft = 1;
3966                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3967                                 $working = $bytevalue & 0x0F;
3968                                 $bytesleft = 2;
3969                         } else { // 1111 0xxx
3970                                 $working = $bytevalue & 0x07;
3971                                 $bytesleft = 3;
3972                         }
3973                 }
3974                 return $result;
3975         }
3976
3977         /**
3978          * Reverse the previously applied transliteration of non-ASCII characters
3979          * back to UTF-8. Used to protect data from corruption by broken web browsers
3980          * as listed in $wgBrowserBlackList.
3981          *
3982          * @param string $invalue
3983          * @return string
3984          */
3985         private function unmakeSafe( $invalue ) {
3986                 $result = "";
3987                 $valueLength = strlen( $invalue );
3988                 for ( $i = 0; $i < $valueLength; $i++ ) {
3989                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3990                                 $i += 3;
3991                                 $hexstring = "";
3992                                 do {
3993                                         $hexstring .= $invalue[$i];
3994                                         $i++;
3995                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3996
3997                                 // Do some sanity checks. These aren't needed for reversibility,
3998                                 // but should help keep the breakage down if the editor
3999                                 // breaks one of the entities whilst editing.
4000                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4001                                         $codepoint = hexdec( $hexstring );
4002                                         $result .= codepointToUtf8( $codepoint );
4003                                 } else {
4004                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4005                                 }
4006                         } else {
4007                                 $result .= substr( $invalue, $i, 1 );
4008                         }
4009                 }
4010                 // reverse the transform that we made for reversibility reasons.
4011                 return strtr( $result, array( "&#x0" => "&#x" ) );
4012         }
4013 }