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