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