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: can't parse content
 155          */
 156         const AS_PARSE_ERROR = 240;
 157
 158         /**
 159          * HTML id and name for the beginning of the edit form.
 160          */
 161         const EDITFORM_ID = 'editform';
 162
 163         /**
 164          * Prefix of key for cookie used to pass post-edit state.
 165          * The revision id edited is added after this
 166          */
 167         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 168
 169         /**
 170          * Duration of PostEdit cookie, in seconds.
 171          * The cookie will be removed instantly if the JavaScript runs.
 172          *
 173          * Otherwise, though, we don't want the cookies to accumulate.
 174          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 175          * limit of only 20 cookies per domain. This still applies at least to some
 176          * versions of IE without full updates:
 177          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 178          *
 179          * A value of 20 minutes should be enough to take into account slow loads and minor
 180          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 181          */
 182         const POST_EDIT_COOKIE_DURATION = 1200;
 183
 184         /** @var Article */
 185         public $mArticle;
 186
 187         /** @var Title */
 188         public $mTitle;
 189
 190         /** @var null|Title */
 191         private $mContextTitle = null;
 192
 193         /** @var string */
 194         public $action = 'submit';
 195
 196         /** @var bool */
 197         public $isConflict = false;
 198
 199         /** @var bool */
 200         public $isCssJsSubpage = false;
 201
 202         /** @var bool */
 203         public $isCssSubpage = false;
 204
 205         /** @var bool */
 206         public $isJsSubpage = false;
 207
 208         /** @var bool */
 209         public $isWrongCaseCssJsPage = false;
 210
 211         /** @var bool New page or new section */
 212         public $isNew = false;
 213
 214         /** @var bool */
 215         public $deletedSinceEdit;
 216
 217         /** @var string */
 218         public $formtype;
 219
 220         /** @var bool */
 221         public $firsttime;
 222
 223         /** @var bool|stdClass */
 224         public $lastDelete;
 225
 226         /** @var bool */
 227         public $mTokenOk = false;
 228
 229         /** @var bool */
 230         public $mTokenOkExceptSuffix = false;
 231
 232         /** @var bool */
 233         public $mTriedSave = false;
 234
 235         /** @var bool */
 236         public $incompleteForm = false;
 237
 238         /** @var bool */
 239         public $tooBig = false;
 240
 241         /** @var bool */
 242         public $kblength = false;
 243
 244         /** @var bool */
 245         public $missingComment = false;
 246
 247         /** @var bool */
 248         public $missingSummary = false;
 249
 250         /** @var bool */
 251         public $allowBlankSummary = false;
 252
 253         /** @var bool */
 254         protected $blankArticle = false;
 255
 256         /** @var bool */
 257         protected $allowBlankArticle = false;
 258
 259         /** @var string */
 260         public $autoSumm = '';
 261
 262         /** @var string */
 263         public $hookError = '';
 264
 265         /** @var ParserOutput */
 266         public $mParserOutput;
 267
 268         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 269         public $hasPresetSummary = false;
 270
 271         /** @var bool */
 272         public $mBaseRevision = false;
 273
 274         /** @var bool */
 275         public $mShowSummaryField = true;
 276
 277         # Form values
 278
 279         /** @var bool */
 280         public $save = false;
 281
 282         /** @var bool */
 283         public $preview = false;
 284
 285         /** @var bool */
 286         public $diff = false;
 287
 288         /** @var bool */
 289         public $minoredit = false;
 290
 291         /** @var bool */
 292         public $watchthis = false;
 293
 294         /** @var bool */
 295         public $recreate = false;
 296
 297         /** @var string */
 298         public $textbox1 = '';
 299
 300         /** @var string */
 301         public $textbox2 = '';
 302
 303         /** @var string */
 304         public $summary = '';
 305
 306         /** @var bool */
 307         public $nosummary = false;
 308
 309         /** @var string */
 310         public $edittime = '';
 311
 312         /** @var string */
 313         public $section = '';
 314
 315         /** @var string */
 316         public $sectiontitle = '';
 317
 318         /** @var string */
 319         public $starttime = '';
 320
 321         /** @var int */
 322         public $oldid = 0;
 323
 324         /** @var int */
 325         public $parentRevId = 0;
 326
 327         /** @var string */
 328         public $editintro = '';
 329
 330         /** @var null */
 331         public $scrolltop = null;
 332
 333         /** @var bool */
 334         public $bot = true;
 335
 336         /** @var null|string */
 337         public $contentModel = null;
 338
 339         /** @var null|string */
 340         public $contentFormat = null;
 341
 342         # Placeholders for text injection by hooks (must be HTML)
 343         # extensions should take care to _append_ to the present value
 344
 345         /** @var string Before even the preview */
 346         public $editFormPageTop = '';
 347         public $editFormTextTop = '';
 348         public $editFormTextBeforeContent = '';
 349         public $editFormTextAfterWarn = '';
 350         public $editFormTextAfterTools = '';
 351         public $editFormTextBottom = '';
 352         public $editFormTextAfterContent = '';
 353         public $previewTextAfterContent = '';
 354         public $mPreloadContent = null;
 355
 356         /* $didSave should be set to true whenever an article was successfully altered. */
 357         public $didSave = false;
 358         public $undidRev = 0;
 359
 360         public $suppressIntro = false;
 361
 362         /** @var bool Set to true to allow editing of non-text content types. */
 363         public $allowNonTextContent = false;
 364
 365         /** @var bool */
 366         protected $edit;
 367
 368         /** @var bool */
 369         public $live;
 370
 371         /**
 372          * @param Article $article
 373          */
 374         public function __construct( Article $article ) {
 375                 $this->mArticle = $article;
 376                 $this->mTitle = $article->getTitle();
 377
 378                 $this->contentModel = $this->mTitle->getContentModel();
 379
 380                 $handler = ContentHandler::getForModelID( $this->contentModel );
 381                 $this->contentFormat = $handler->getDefaultFormat();
 382         }
 383
 384         /**
 385          * @return Article
 386          */
 387         public function getArticle() {
 388                 return $this->mArticle;
 389         }
 390
 391         /**
 392          * @since 1.19
 393          * @return Title
 394          */
 395         public function getTitle() {
 396                 return $this->mTitle;
 397         }
 398
 399         /**
 400          * Set the context Title object
 401          *
 402          * @param Title|null $title Title object or null
 403          */
 404         public function setContextTitle( $title ) {
 405                 $this->mContextTitle = $title;
 406         }
 407
 408         /**
 409          * Get the context title object.
 410          * If not set, $wgTitle will be returned. This behavior might change in
 411          * the future to return $this->mTitle instead.
 412          *
 413          * @return Title
 414          */
 415         public function getContextTitle() {
 416                 if ( is_null( $this->mContextTitle ) ) {
 417                         global $wgTitle;
 418                         return $wgTitle;
 419                 } else {
 420                         return $this->mContextTitle;
 421                 }
 422         }
 423
 424         /**
 425          * Returns if the given content model is editable.
 426          *
 427          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 428          * @return bool
 429          * @throws MWException If $modelId has no known handler
 430          */
 431         public function isSupportedContentModel( $modelId ) {
 432                 return $this->allowNonTextContent ||
 433                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 434         }
 435
 436         function submit() {
 437                 $this->edit();
 438         }
 439
 440         /**
 441          * This is the function that gets called for "action=edit". It
 442          * sets up various member variables, then passes execution to
 443          * another function, usually showEditForm()
 444          *
 445          * The edit form is self-submitting, so that when things like
 446          * preview and edit conflicts occur, we get the same form back
 447          * with the extra stuff added.  Only when the final submission
 448          * is made and all is well do we actually save and redirect to
 449          * the newly-edited page.
 450          */
 451         function edit() {
 452                 global $wgOut, $wgRequest, $wgUser;
 453                 // Allow extensions to modify/prevent this form or submission
 454                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 455                         return;
 456                 }
 457
 458                 wfProfileIn( __METHOD__ );
 459                 wfDebug( __METHOD__ . ": enter\n" );
 460
 461                 // If they used redlink=1 and the page exists, redirect to the main article
 462                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 463                         $wgOut->redirect( $this->mTitle->getFullURL() );
 464                         wfProfileOut( __METHOD__ );
 465                         return;
 466                 }
 467
 468                 $this->importFormData( $wgRequest );
 469                 $this->firsttime = false;
 470
 471                 if ( $this->live ) {
 472                         $this->livePreview();
 473                         wfProfileOut( __METHOD__ );
 474                         return;
 475                 }
 476
 477                 if ( wfReadOnly() && $this->save ) {
 478                         // Force preview
 479                         $this->save = false;
 480                         $this->preview = true;
 481                 }
 482
 483                 if ( $this->save ) {
 484                         $this->formtype = 'save';
 485                 } elseif ( $this->preview ) {
 486                         $this->formtype = 'preview';
 487                 } elseif ( $this->diff ) {
 488                         $this->formtype = 'diff';
 489                 } else { # First time through
 490                         $this->firsttime = true;
 491                         if ( $this->previewOnOpen() ) {
 492                                 $this->formtype = 'preview';
 493                         } else {
 494                                 $this->formtype = 'initial';
 495                         }
 496                 }
 497
 498                 $permErrors = $this->getEditPermissionErrors();
 499                 if ( $permErrors ) {
 500                         wfDebug( __METHOD__ . ": User can't edit\n" );
 501                         // Auto-block user's IP if the account was "hard" blocked
 502                         $wgUser->spreadAnyEditBlock();
 503
 504                         $this->displayPermissionsError( $permErrors );
 505
 506                         wfProfileOut( __METHOD__ );
 507                         return;
 508                 }
 509
 510                 wfProfileIn( __METHOD__ . "-business-end" );
 511
 512                 $this->isConflict = false;
 513                 // css / js subpages of user pages get a special treatment
 514                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 515                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 516                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 517                 // @todo FIXME: Silly assignment.
 518                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 519
 520                 # Show applicable editing introductions
 521                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 522                         $this->showIntro();
 523                 }
 524
 525                 # Attempt submission here.  This will check for edit conflicts,
 526                 # and redundantly check for locked database, blocked IPs, etc.
 527                 # that edit() already checked just in case someone tries to sneak
 528                 # in the back door with a hand-edited submission URL.
 529
 530                 if ( 'save' == $this->formtype ) {
 531                         if ( !$this->attemptSave() ) {
 532                                 wfProfileOut( __METHOD__ . "-business-end" );
 533                                 wfProfileOut( __METHOD__ );
 534                                 return;
 535                         }
 536                 }
 537
 538                 # First time through: get contents, set time for conflict
 539                 # checking, etc.
 540                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 541                         if ( $this->initialiseForm() === false ) {
 542                                 $this->noSuchSectionPage();
 543                                 wfProfileOut( __METHOD__ . "-business-end" );
 544                                 wfProfileOut( __METHOD__ );
 545                                 return;
 546                         }
 547
 548                         if ( !$this->mTitle->getArticleID() ) {
 549                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 550                         } else {
 551                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 552                         }
 553
 554                 }
 555
 556                 $this->showEditForm();
 557                 wfProfileOut( __METHOD__ . "-business-end" );
 558                 wfProfileOut( __METHOD__ );
 559         }
 560
 561         /**
 562          * @return array
 563          */
 564         protected function getEditPermissionErrors() {
 565                 global $wgUser;
 566                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 567                 # Can this title be created?
 568                 if ( !$this->mTitle->exists() ) {
 569                         $permErrors = array_merge( $permErrors,
 570                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 571                 }
 572                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 573                 $remove = array();
 574                 foreach ( $permErrors as $error ) {
 575                         if ( ( $this->preview || $this->diff )
 576                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 577                         ) {
 578                                 $remove[] = $error;
 579                         }
 580                 }
 581                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 582                 return $permErrors;
 583         }
 584
 585         /**
 586          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 587          * but with the following differences:
 588          * - If redlink=1, the user will be redirected to the page
 589          * - If there is content to display or the error occurs while either saving,
 590          *   previewing or showing the difference, it will be a
 591          *   "View source for ..." page displaying the source code after the error message.
 592          *
 593          * @since 1.19
 594          * @param array $permErrors Array of permissions errors, as returned by
 595          *    Title::getUserPermissionsErrors().
 596          * @throws PermissionsError
 597          */
 598         protected function displayPermissionsError( array $permErrors ) {
 599                 global $wgRequest, $wgOut;
 600
 601                 if ( $wgRequest->getBool( 'redlink' ) ) {
 602                         // The edit page was reached via a red link.
 603                         // Redirect to the article page and let them click the edit tab if
 604                         // they really want a permission error.
 605                         $wgOut->redirect( $this->mTitle->getFullURL() );
 606                         return;
 607                 }
 608
 609                 $content = $this->getContentObject();
 610
 611                 # Use the normal message if there's nothing to display
 612                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 613                         $action = $this->mTitle->exists() ? 'edit' :
 614                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 615                         throw new PermissionsError( $action, $permErrors );
 616                 }
 617
 618                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 619
 620                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 621                 $wgOut->setPageTitle( wfMessage(
 622                         'viewsource-title',
 623                         $this->getContextTitle()->getPrefixedText()
 624                 ) );
 625                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 626                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 627                 $wgOut->addHTML( "<hr />\n" );
 628
 629                 # If the user made changes, preserve them when showing the markup
 630                 # (This happens when a user is blocked during edit, for instance)
 631                 if ( !$this->firsttime ) {
 632                         $text = $this->textbox1;
 633                         $wgOut->addWikiMsg( 'viewyourtext' );
 634                 } else {
 635                         $text = $this->toEditText( $content );
 636                         $wgOut->addWikiMsg( 'viewsourcetext' );
 637                 }
 638
 639                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 640
 641                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 642                         Linker::formatTemplates( $this->getTemplates() ) ) );
 643
 644                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 645
 646                 if ( $this->mTitle->exists() ) {
 647                         $wgOut->returnToMain( null, $this->mTitle );
 648                 }
 649         }
 650
 651         /**
 652          * Should we show a preview when the edit form is first shown?
 653          *
 654          * @return bool
 655          */
 656         protected function previewOnOpen() {
 657                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 658                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 659                         // Explicit override from request
 660                         return true;
 661                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 662                         // Explicit override from request
 663                         return false;
 664                 } elseif ( $this->section == 'new' ) {
 665                         // Nothing *to* preview for new sections
 666                         return false;
 667                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 668                         && $wgUser->getOption( 'previewonfirst' )
 669                 ) {
 670                         // Standard preference behavior
 671                         return true;
 672                 } elseif ( !$this->mTitle->exists()
 673                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 674                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 675                 ) {
 676                         // Categories are special
 677                         return true;
 678                 } else {
 679                         return false;
 680                 }
 681         }
 682
 683         /**
 684          * Checks whether the user entered a skin name in uppercase,
 685          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 686          *
 687          * @return bool
 688          */
 689         protected function isWrongCaseCssJsPage() {
 690                 if ( $this->mTitle->isCssJsSubpage() ) {
 691                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 692                         $skins = array_merge(
 693                                 array_keys( Skin::getSkinNames() ),
 694                                 array( 'common' )
 695                         );
 696                         return !in_array( $name, $skins )
 697                                 && in_array( strtolower( $name ), $skins );
 698                 } else {
 699                         return false;
 700                 }
 701         }
 702
 703         /**
 704          * Returns whether section editing is supported for the current page.
 705          * Subclasses may override this to replace the default behavior, which is
 706          * to check ContentHandler::supportsSections.
 707          *
 708          * @return bool True if this edit page supports sections, false otherwise.
 709          */
 710         protected function isSectionEditSupported() {
 711                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 712                 return $contentHandler->supportsSections();
 713         }
 714
 715         /**
 716          * This function collects the form data and uses it to populate various member variables.
 717          * @param WebRequest $request
 718          * @throws ErrorPageError
 719          */
 720         function importFormData( &$request ) {
 721                 global $wgContLang, $wgUser;
 722
 723                 wfProfileIn( __METHOD__ );
 724
 725                 # Section edit can come from either the form or a link
 726                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 727
 728                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 729                         wfProfileOut( __METHOD__ );
 730                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 731                 }
 732
 733                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 734
 735                 if ( $request->wasPosted() ) {
 736                         # These fields need to be checked for encoding.
 737                         # Also remove trailing whitespace, but don't remove _initial_
 738                         # whitespace from the text boxes. This may be significant formatting.
 739                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 740                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 741                                 // Skip this if wpTextbox2 has input, it indicates that we came
 742                                 // from a conflict page with raw page text, not a custom form
 743                                 // modified by subclasses
 744                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 745                                 $textbox1 = $this->importContentFormData( $request );
 746                                 if ( $textbox1 !== null ) {
 747                                         $this->textbox1 = $textbox1;
 748                                 }
 749
 750                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 751                         }
 752
 753                         # Truncate for whole multibyte characters
 754                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 755
 756                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 757                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 758                         # section titles.
 759                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 760
 761                         # Treat sectiontitle the same way as summary.
 762                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 763                         # currently doing double duty as both edit summary and section title. Right now this
 764                         # is just to allow API edits to work around this limitation, but this should be
 765                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 766                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 767                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 768
 769                         $this->edittime = $request->getVal( 'wpEdittime' );
 770                         $this->starttime = $request->getVal( 'wpStarttime' );
 771
 772                         $undidRev = $request->getInt( 'wpUndidRevision' );
 773                         if ( $undidRev ) {
 774                                 $this->undidRev = $undidRev;
 775                         }
 776
 777                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 778
 779                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 780                                 // wpTextbox1 field is missing, possibly due to being "too big"
 781                                 // according to some filter rules such as Suhosin's setting for
 782                                 // suhosin.request.max_value_length (d'oh)
 783                                 $this->incompleteForm = true;
 784                         } else {
 785                                 // If we receive the last parameter of the request, we can fairly
 786                                 // claim the POST request has not been truncated.
 787
 788                                 // TODO: softened the check for cutover.  Once we determine
 789                                 // that it is safe, we should complete the transition by
 790                                 // removing the "edittime" clause.
 791                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 792                                         && is_null( $this->edittime ) );
 793                         }
 794                         if ( $this->incompleteForm ) {
 795                                 # If the form is incomplete, force to preview.
 796                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 797                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 798                                 $this->preview = true;
 799                         } else {
 800                                 /* Fallback for live preview */
 801                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 802                                 $this->diff = $request->getCheck( 'wpDiff' );
 803
 804                                 // Remember whether a save was requested, so we can indicate
 805                                 // if we forced preview due to session failure.
 806                                 $this->mTriedSave = !$this->preview;
 807
 808                                 if ( $this->tokenOk( $request ) ) {
 809                                         # Some browsers will not report any submit button
 810                                         # if the user hits enter in the comment box.
 811                                         # The unmarked state will be assumed to be a save,
 812                                         # if the form seems otherwise complete.
 813                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 814                                 } elseif ( $this->diff ) {
 815                                         # Failed token check, but only requested "Show Changes".
 816                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 817                                 } else {
 818                                         # Page might be a hack attempt posted from
 819                                         # an external site. Preview instead of saving.
 820                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 821                                         $this->preview = true;
 822                                 }
 823                         }
 824                         $this->save = !$this->preview && !$this->diff;
 825                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 826                                 $this->edittime = null;
 827                         }
 828
 829                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 830                                 $this->starttime = null;
 831                         }
 832
 833                         $this->recreate = $request->getCheck( 'wpRecreate' );
 834
 835                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 836                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 837
 838                         # Don't force edit summaries when a user is editing their own user or talk page
 839                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 840                                 && $this->mTitle->getText() == $wgUser->getName()
 841                         ) {
 842                                 $this->allowBlankSummary = true;
 843                         } else {
 844                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 845                                         || !$wgUser->getOption( 'forceeditsummary' );
 846                         }
 847
 848                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 849
 850                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 851                 } else {
 852                         # Not a posted form? Start with nothing.
 853                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 854                         $this->textbox1 = '';
 855                         $this->summary = '';
 856                         $this->sectiontitle = '';
 857                         $this->edittime = '';
 858                         $this->starttime = wfTimestampNow();
 859                         $this->edit = false;
 860                         $this->preview = false;
 861                         $this->save = false;
 862                         $this->diff = false;
 863                         $this->minoredit = false;
 864                         // Watch may be overridden by request parameters
 865                         $this->watchthis = $request->getBool( 'watchthis', false );
 866                         $this->recreate = false;
 867
 868                         // When creating a new section, we can preload a section title by passing it as the
 869                         // preloadtitle parameter in the URL (Bug 13100)
 870                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 871                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 872                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 873                                 $this->summary = $request->getVal( 'preloadtitle' );
 874                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 875                                 $this->summary = $request->getText( 'summary' );
 876                                 if ( $this->summary !== '' ) {
 877                                         $this->hasPresetSummary = true;
 878                                 }
 879                         }
 880
 881                         if ( $request->getVal( 'minor' ) ) {
 882                                 $this->minoredit = true;
 883                         }
 884                 }
 885
 886                 $this->oldid = $request->getInt( 'oldid' );
 887                 $this->parentRevId = $request->getInt( 'parentRevId' );
 888
 889                 $this->bot = $request->getBool( 'bot', true );
 890                 $this->nosummary = $request->getBool( 'nosummary' );
 891
 892                 // May be overridden by revision.
 893                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 894                 // May be overridden by revision.
 895                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 896
 897                 if ( !ContentHandler::getForModelID( $this->contentModel )
 898                         ->isSupportedFormat( $this->contentFormat )
 899                 ) {
 900                         throw new ErrorPageError(
 901                                 'editpage-notsupportedcontentformat-title',
 902                                 'editpage-notsupportedcontentformat-text',
 903                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 904                         );
 905                 }
 906
 907                 /**
 908                  * @todo Check if the desired model is allowed in this namespace, and if
 909                  *   a transition from the page's current model to the new model is
 910                  *   allowed.
 911                  */
 912
 913                 $this->live = $request->getCheck( 'live' );
 914                 $this->editintro = $request->getText( 'editintro',
 915                         // Custom edit intro for new sections
 916                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 917
 918                 // Allow extensions to modify form data
 919                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 920
 921                 wfProfileOut( __METHOD__ );
 922         }
 923
 924         /**
 925          * Subpage overridable method for extracting the page content data from the
 926          * posted form to be placed in $this->textbox1, if using customized input
 927          * this method should be overridden and return the page text that will be used
 928          * for saving, preview parsing and so on...
 929          *
 930          * @param WebRequest $request
 931          */
 932         protected function importContentFormData( &$request ) {
 933                 return; // Don't do anything, EditPage already extracted wpTextbox1
 934         }
 935
 936         /**
 937          * Initialise form fields in the object
 938          * Called on the first invocation, e.g. when a user clicks an edit link
 939          * @return bool If the requested section is valid
 940          */
 941         function initialiseForm() {
 942                 global $wgUser;
 943                 $this->edittime = $this->mArticle->getTimestamp();
 944
 945                 $content = $this->getContentObject( false ); #TODO: track content object?!
 946                 if ( $content === false ) {
 947                         return false;
 948                 }
 949                 $this->textbox1 = $this->toEditText( $content );
 950
 951                 // activate checkboxes if user wants them to be always active
 952                 # Sort out the "watch" checkbox
 953                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 954                         # Watch all edits
 955                         $this->watchthis = true;
 956                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 957                         # Watch creations
 958                         $this->watchthis = true;
 959                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 960                         # Already watched
 961                         $this->watchthis = true;
 962                 }
 963                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 964                         $this->minoredit = true;
 965                 }
 966                 if ( $this->textbox1 === false ) {
 967                         return false;
 968                 }
 969                 return true;
 970         }
 971
 972         /**
 973          * @param Content|null $def_content The default value to return
 974          *
 975          * @return Content|null Content on success, $def_content for invalid sections
 976          *
 977          * @since 1.21
 978          */
 979         protected function getContentObject( $def_content = null ) {
 980                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 981
 982                 wfProfileIn( __METHOD__ );
 983
 984                 $content = false;
 985
 986                 // For message page not locally set, use the i18n message.
 987                 // For other non-existent articles, use preload text if any.
 988                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 989                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 990                                 # If this is a system message, get the default text.
 991                                 $msg = $this->mTitle->getDefaultMessageText();
 992
 993                                 $content = $this->toEditContent( $msg );
 994                         }
 995                         if ( $content === false ) {
 996                                 # If requested, preload some text.
 997                                 $preload = $wgRequest->getVal( 'preload',
 998                                         // Custom preload text for new sections
 999                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1000                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1001
1002                                 $content = $this->getPreloadedContent( $preload, $params );
1003                         }
1004                 // For existing pages, get text based on "undo" or section parameters.
1005                 } else {
1006                         if ( $this->section != '' ) {
1007                                 // Get section edit text (returns $def_text for invalid sections)
1008                                 $orig = $this->getOriginalContent( $wgUser );
1009                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1010
1011                                 if ( !$content ) {
1012                                         $content = $def_content;
1013                                 }
1014                         } else {
1015                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1016                                 $undo = $wgRequest->getInt( 'undo' );
1017
1018                                 if ( $undo > 0 && $undoafter > 0 ) {
1019
1020                                         $undorev = Revision::newFromId( $undo );
1021                                         $oldrev = Revision::newFromId( $undoafter );
1022
1023                                         # Sanity check, make sure it's the right page,
1024                                         # the revisions exist and they were not deleted.
1025                                         # Otherwise, $content will be left as-is.
1026                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1027                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1028                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1029
1030                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1031
1032                                                 if ( $content === false ) {
1033                                                         # Warn the user that something went wrong
1034                                                         $undoMsg = 'failure';
1035                                                 } else {
1036                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1037                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1038                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1039
1040                                                         if ( $newContent->equals( $oldContent ) ) {
1041                                                                 # Tell the user that the undo results in no change,
1042                                                                 # i.e. the revisions were already undone.
1043                                                                 $undoMsg = 'nochange';
1044                                                                 $content = false;
1045                                                         } else {
1046                                                                 # Inform the user of our success and set an automatic edit summary
1047                                                                 $undoMsg = 'success';
1048
1049                                                                 # If we just undid one rev, use an autosummary
1050                                                                 $firstrev = $oldrev->getNext();
1051                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1052                                                                         $userText = $undorev->getUserText();
1053                                                                         if ( $userText === '' ) {
1054                                                                                 $undoSummary = wfMessage(
1055                                                                                         'undo-summary-username-hidden',
1056                                                                                         $undo
1057                                                                                 )->inContentLanguage()->text();
1058                                                                         } else {
1059                                                                                 $undoSummary = wfMessage(
1060                                                                                         'undo-summary',
1061                                                                                         $undo,
1062                                                                                         $userText
1063                                                                                 )->inContentLanguage()->text();
1064                                                                         }
1065                                                                         if ( $this->summary === '' ) {
1066                                                                                 $this->summary = $undoSummary;
1067                                                                         } else {
1068                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1069                                                                                         ->inContentLanguage()->text() . $this->summary;
1070                                                                         }
1071                                                                         $this->undidRev = $undo;
1072                                                                 }
1073                                                                 $this->formtype = 'diff';
1074                                                         }
1075                                                 }
1076                                         } else {
1077                                                 // Failed basic sanity checks.
1078                                                 // Older revisions may have been removed since the link
1079                                                 // was created, or we may simply have got bogus input.
1080                                                 $undoMsg = 'norev';
1081                                         }
1082
1083                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1084                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1085                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1086                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1087                                 }
1088
1089                                 if ( $content === false ) {
1090                                         $content = $this->getOriginalContent( $wgUser );
1091                                 }
1092                         }
1093                 }
1094
1095                 wfProfileOut( __METHOD__ );
1096                 return $content;
1097         }
1098
1099         /**
1100          * Get the content of the wanted revision, without section extraction.
1101          *
1102          * The result of this function can be used to compare user's input with
1103          * section replaced in its context (using WikiPage::replaceSection())
1104          * to the original text of the edit.
1105          *
1106          * This differs from Article::getContent() that when a missing revision is
1107          * encountered the result will be null and not the
1108          * 'missing-revision' message.
1109          *
1110          * @since 1.19
1111          * @param User $user The user to get the revision for
1112          * @return Content|null
1113          */
1114         private function getOriginalContent( User $user ) {
1115                 if ( $this->section == 'new' ) {
1116                         return $this->getCurrentContent();
1117                 }
1118                 $revision = $this->mArticle->getRevisionFetched();
1119                 if ( $revision === null ) {
1120                         if ( !$this->contentModel ) {
1121                                 $this->contentModel = $this->getTitle()->getContentModel();
1122                         }
1123                         $handler = ContentHandler::getForModelID( $this->contentModel );
1124
1125                         return $handler->makeEmptyContent();
1126                 }
1127                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1128                 return $content;
1129         }
1130
1131         /**
1132          * Get the current content of the page. This is basically similar to
1133          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1134          * content object is returned instead of null.
1135          *
1136          * @since 1.21
1137          * @return Content
1138          */
1139         protected function getCurrentContent() {
1140                 $rev = $this->mArticle->getRevision();
1141                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1142
1143                 if ( $content === false || $content === null ) {
1144                         if ( !$this->contentModel ) {
1145                                 $this->contentModel = $this->getTitle()->getContentModel();
1146                         }
1147                         $handler = ContentHandler::getForModelID( $this->contentModel );
1148
1149                         return $handler->makeEmptyContent();
1150                 } else {
1151                         # nasty side-effect, but needed for consistency
1152                         $this->contentModel = $rev->getContentModel();
1153                         $this->contentFormat = $rev->getContentFormat();
1154
1155                         return $content;
1156                 }
1157         }
1158
1159         /**
1160          * Use this method before edit() to preload some content into the edit box
1161          *
1162          * @param Content $content
1163          *
1164          * @since 1.21
1165          */
1166         public function setPreloadedContent( Content $content ) {
1167                 $this->mPreloadContent = $content;
1168         }
1169
1170         /**
1171          * Get the contents to be preloaded into the box, either set by
1172          * an earlier setPreloadText() or by loading the given page.
1173          *
1174          * @param string $preload Representing the title to preload from.
1175          * @param array $params Parameters to use (interface-message style) in the preloaded text
1176          *
1177          * @return Content
1178          *
1179          * @since 1.21
1180          */
1181         protected function getPreloadedContent( $preload, $params = array() ) {
1182                 global $wgUser;
1183
1184                 if ( !empty( $this->mPreloadContent ) ) {
1185                         return $this->mPreloadContent;
1186                 }
1187
1188                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1189
1190                 if ( $preload === '' ) {
1191                         return $handler->makeEmptyContent();
1192                 }
1193
1194                 $title = Title::newFromText( $preload );
1195                 # Check for existence to avoid getting MediaWiki:Noarticletext
1196                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1197                         //TODO: somehow show a warning to the user!
1198                         return $handler->makeEmptyContent();
1199                 }
1200
1201                 $page = WikiPage::factory( $title );
1202                 if ( $page->isRedirect() ) {
1203                         $title = $page->getRedirectTarget();
1204                         # Same as before
1205                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1206                                 //TODO: somehow show a warning to the user!
1207                                 return $handler->makeEmptyContent();
1208                         }
1209                         $page = WikiPage::factory( $title );
1210                 }
1211
1212                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1213                 $content = $page->getContent( Revision::RAW );
1214
1215                 if ( !$content ) {
1216                         //TODO: somehow show a warning to the user!
1217                         return $handler->makeEmptyContent();
1218                 }
1219
1220                 if ( $content->getModel() !== $handler->getModelID() ) {
1221                         $converted = $content->convert( $handler->getModelID() );
1222
1223                         if ( !$converted ) {
1224                                 //TODO: somehow show a warning to the user!
1225                                 wfDebug( "Attempt to preload incompatible content: "
1226                                                 . "can't convert " . $content->getModel()
1227                                                 . " to " . $handler->getModelID() );
1228
1229                                 return $handler->makeEmptyContent();
1230                         }
1231
1232                         $content = $converted;
1233                 }
1234
1235                 return $content->preloadTransform( $title, $parserOptions, $params );
1236         }
1237
1238         /**
1239          * Make sure the form isn't faking a user's credentials.
1240          *
1241          * @param WebRequest $request
1242          * @return bool
1243          * @private
1244          */
1245         function tokenOk( &$request ) {
1246                 global $wgUser;
1247                 $token = $request->getVal( 'wpEditToken' );
1248                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1249                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1250                 return $this->mTokenOk;
1251         }
1252
1253         /**
1254          * Sets post-edit cookie indicating the user just saved a particular revision.
1255          *
1256          * This uses a temporary cookie for each revision ID so separate saves will never
1257          * interfere with each other.
1258          *
1259          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1260          * the redirect.  It must be clearable by JavaScript code, so it must not be
1261          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1262          * variable.
1263          *
1264          * If the variable were set on the server, it would be cached, which is unwanted
1265          * since the post-edit state should only apply to the load right after the save.
1266          *
1267          * @param int $statusValue The status value (to check for new article status)
1268          */
1269         protected function setPostEditCookie( $statusValue ) {
1270                 $revisionId = $this->mArticle->getLatest();
1271                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1272
1273                 $val = 'saved';
1274                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1275                         $val = 'created';
1276                 } elseif ( $this->oldid ) {
1277                         $val = 'restored';
1278                 }
1279
1280                 $response = RequestContext::getMain()->getRequest()->response();
1281                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1282                         'httpOnly' => false,
1283                 ) );
1284         }
1285
1286         /**
1287          * Attempt submission
1288          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1289          * @return bool False if output is done, true if the rest of the form should be displayed
1290          */
1291         public function attemptSave() {
1292                 global $wgUser;
1293
1294                 $resultDetails = false;
1295                 # Allow bots to exempt some edits from bot flagging
1296                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1297                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1298
1299                 return $this->handleStatus( $status, $resultDetails );
1300         }
1301
1302         /**
1303          * Handle status, such as after attempt save
1304          *
1305          * @param Status $status
1306          * @param array|bool $resultDetails
1307          *
1308          * @throws ErrorPageError
1309          * @return bool False, if output is done, true if rest of the form should be displayed
1310          */
1311         private function handleStatus( Status $status, $resultDetails ) {
1312                 global $wgUser, $wgOut;
1313
1314                 /**
1315                  * @todo FIXME: once the interface for internalAttemptSave() is made
1316                  *   nicer, this should use the message in $status
1317                  */
1318                 if ( $status->value == self::AS_SUCCESS_UPDATE
1319                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1320                 ) {
1321                         $this->didSave = true;
1322                         if ( !$resultDetails['nullEdit'] ) {
1323                                 $this->setPostEditCookie( $status->value );
1324                         }
1325                 }
1326
1327                 switch ( $status->value ) {
1328                         case self::AS_HOOK_ERROR_EXPECTED:
1329                         case self::AS_CONTENT_TOO_BIG:
1330                         case self::AS_ARTICLE_WAS_DELETED:
1331                         case self::AS_CONFLICT_DETECTED:
1332                         case self::AS_SUMMARY_NEEDED:
1333                         case self::AS_TEXTBOX_EMPTY:
1334                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1335                         case self::AS_END:
1336                         case self::AS_BLANK_ARTICLE:
1337                                 return true;
1338
1339                         case self::AS_HOOK_ERROR:
1340                                 return false;
1341
1342                         case self::AS_PARSE_ERROR:
1343                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1344                                 return true;
1345
1346                         case self::AS_SUCCESS_NEW_ARTICLE:
1347                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1348                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1349                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1350                                 return false;
1351
1352                         case self::AS_SUCCESS_UPDATE:
1353                                 $extraQuery = '';
1354                                 $sectionanchor = $resultDetails['sectionanchor'];
1355
1356                                 // Give extensions a chance to modify URL query on update
1357                                 wfRunHooks(
1358                                         'ArticleUpdateBeforeRedirect',
1359                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1360                                 );
1361
1362                                 if ( $resultDetails['redirect'] ) {
1363                                         if ( $extraQuery == '' ) {
1364                                                 $extraQuery = 'redirect=no';
1365                                         } else {
1366                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1367                                         }
1368                                 }
1369                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1370                                 return false;
1371
1372                         case self::AS_SPAM_ERROR:
1373                                 $this->spamPageWithContent( $resultDetails['spam'] );
1374                                 return false;
1375
1376                         case self::AS_BLOCKED_PAGE_FOR_USER:
1377                                 throw new UserBlockedError( $wgUser->getBlock() );
1378
1379                         case self::AS_IMAGE_REDIRECT_ANON:
1380                         case self::AS_IMAGE_REDIRECT_LOGGED:
1381                                 throw new PermissionsError( 'upload' );
1382
1383                         case self::AS_READ_ONLY_PAGE_ANON:
1384                         case self::AS_READ_ONLY_PAGE_LOGGED:
1385                                 throw new PermissionsError( 'edit' );
1386
1387                         case self::AS_READ_ONLY_PAGE:
1388                                 throw new ReadOnlyError;
1389
1390                         case self::AS_RATE_LIMITED:
1391                                 throw new ThrottledError();
1392
1393                         case self::AS_NO_CREATE_PERMISSION:
1394                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1395                                 throw new PermissionsError( $permission );
1396
1397                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1398                                 throw new PermissionsError( 'editcontentmodel' );
1399
1400                         default:
1401                                 // We don't recognize $status->value. The only way that can happen
1402                                 // is if an extension hook aborted from inside ArticleSave.
1403                                 // Render the status object into $this->hookError
1404                                 // FIXME this sucks, we should just use the Status object throughout
1405                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1406                                         '</div>';
1407                                 return true;
1408                 }
1409         }
1410
1411         /**
1412          * Run hooks that can filter edits just before they get saved.
1413          *
1414          * @param Content $content The Content to filter.
1415          * @param Status $status For reporting the outcome to the caller
1416          * @param User $user The user performing the edit
1417          *
1418          * @return bool
1419          */
1420         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1421                 // Run old style post-section-merge edit filter
1422                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1423                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1424
1425                         # Error messages etc. could be handled within the hook...
1426                         $status->fatal( 'hookaborted' );
1427                         $status->value = self::AS_HOOK_ERROR;
1428                         return false;
1429                 } elseif ( $this->hookError != '' ) {
1430                         # ...or the hook could be expecting us to produce an error
1431                         $status->fatal( 'hookaborted' );
1432                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1433                         return false;
1434                 }
1435
1436                 // Run new style post-section-merge edit filter
1437                 if ( !wfRunHooks( 'EditFilterMergedContent',
1438                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1439                                 $user, $this->minoredit ) ) ) {
1440
1441                         # Error messages etc. could be handled within the hook...
1442                         // XXX: $status->value may already be something informative...
1443                         $this->hookError = $status->getWikiText();
1444                         $status->fatal( 'hookaborted' );
1445                         $status->value = self::AS_HOOK_ERROR;
1446                         return false;
1447                 } elseif ( !$status->isOK() ) {
1448                         # ...or the hook could be expecting us to produce an error
1449                         // FIXME this sucks, we should just use the Status object throughout
1450                         $this->hookError = $status->getWikiText();
1451                         $status->fatal( 'hookaborted' );
1452                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1453                         return false;
1454                 }
1455
1456                 return true;
1457         }
1458
1459         /**
1460          * Return the summary to be used for a new section.
1461          *
1462          * @param string $sectionanchor Set to the section anchor text
1463          * @return string
1464          */
1465         private function newSectionSummary( &$sectionanchor = null ) {
1466                 global $wgParser;
1467
1468                 if ( $this->sectiontitle !== '' ) {
1469                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1470                         // If no edit summary was specified, create one automatically from the section
1471                         // title and have it link to the new section. Otherwise, respect the summary as
1472                         // passed.
1473                         if ( $this->summary === '' ) {
1474                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1475                                 return wfMessage( 'newsectionsummary' )
1476                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1477                         }
1478                 } elseif ( $this->summary !== '' ) {
1479                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1480                         # This is a new section, so create a link to the new section
1481                         # in the revision summary.
1482                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1483                         return wfMessage( 'newsectionsummary' )
1484                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1485                 }
1486                 return $this->summary;
1487         }
1488
1489         /**
1490          * Attempt submission (no UI)
1491          *
1492          * @param array $result Array to add statuses to, currently with the
1493          *   possible keys:
1494          *   - spam (string): Spam string from content if any spam is detected by
1495          *     matchSpamRegex.
1496          *   - sectionanchor (string): Section anchor for a section save.
1497          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1498          *     false otherwise.
1499          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1500          *     revision is a redirect.
1501          * @param bool $bot True if edit is being made under the bot right.
1502          *
1503          * @return Status Status object, possibly with a message, but always with
1504          *   one of the AS_* constants in $status->value,
1505          *
1506          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1507          *   various error display idiosyncrasies. There are also lots of cases
1508          *   where error metadata is set in the object and retrieved later instead
1509          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1510          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1511          * time.
1512          */
1513         function internalAttemptSave( &$result, $bot = false ) {
1514                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1515
1516                 $status = Status::newGood();
1517
1518                 wfProfileIn( __METHOD__ );
1519                 wfProfileIn( __METHOD__ . '-checks' );
1520
1521                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1522                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1523                         $status->fatal( 'hookaborted' );
1524                         $status->value = self::AS_HOOK_ERROR;
1525                         wfProfileOut( __METHOD__ . '-checks' );
1526                         wfProfileOut( __METHOD__ );
1527                         return $status;
1528                 }
1529
1530                 $spam = $wgRequest->getText( 'wpAntispam' );
1531                 if ( $spam !== '' ) {
1532                         wfDebugLog(
1533                                 'SimpleAntiSpam',
1534                                 $wgUser->getName() .
1535                                 ' editing "' .
1536                                 $this->mTitle->getPrefixedText() .
1537                                 '" submitted bogus field "' .
1538                                 $spam .
1539                                 '"'
1540                         );
1541                         $status->fatal( 'spamprotectionmatch', false );
1542                         $status->value = self::AS_SPAM_ERROR;
1543                         wfProfileOut( __METHOD__ . '-checks' );
1544                         wfProfileOut( __METHOD__ );
1545                         return $status;
1546                 }
1547
1548                 try {
1549                         # Construct Content object
1550                         $textbox_content = $this->toEditContent( $this->textbox1 );
1551                 } catch ( MWContentSerializationException $ex ) {
1552                         $status->fatal(
1553                                 'content-failed-to-parse',
1554                                 $this->contentModel,
1555                                 $this->contentFormat,
1556                                 $ex->getMessage()
1557                         );
1558                         $status->value = self::AS_PARSE_ERROR;
1559                         wfProfileOut( __METHOD__ . '-checks' );
1560                         wfProfileOut( __METHOD__ );
1561                         return $status;
1562                 }
1563
1564                 # Check image redirect
1565                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1566                         $textbox_content->isRedirect() &&
1567                         !$wgUser->isAllowed( 'upload' )
1568                 ) {
1569                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1570                                 $status->setResult( false, $code );
1571
1572                                 wfProfileOut( __METHOD__ . '-checks' );
1573                                 wfProfileOut( __METHOD__ );
1574
1575                                 return $status;
1576                 }
1577
1578                 # Check for spam
1579                 $match = self::matchSummarySpamRegex( $this->summary );
1580                 if ( $match === false && $this->section == 'new' ) {
1581                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1582                         # regular summaries, it is added to the actual wikitext.
1583                         if ( $this->sectiontitle !== '' ) {
1584                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1585                                 $match = self::matchSpamRegex( $this->sectiontitle );
1586                         } else {
1587                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1588                                 # is used with the 'summary' parameter.
1589                                 $match = self::matchSpamRegex( $this->summary );
1590                         }
1591                 }
1592                 if ( $match === false ) {
1593                         $match = self::matchSpamRegex( $this->textbox1 );
1594                 }
1595                 if ( $match !== false ) {
1596                         $result['spam'] = $match;
1597                         $ip = $wgRequest->getIP();
1598                         $pdbk = $this->mTitle->getPrefixedDBkey();
1599                         $match = str_replace( "\n", '', $match );
1600                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1601                         $status->fatal( 'spamprotectionmatch', $match );
1602                         $status->value = self::AS_SPAM_ERROR;
1603                         wfProfileOut( __METHOD__ . '-checks' );
1604                         wfProfileOut( __METHOD__ );
1605                         return $status;
1606                 }
1607                 if ( !wfRunHooks(
1608                         'EditFilter',
1609                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1610                 ) {
1611                         # Error messages etc. could be handled within the hook...
1612                         $status->fatal( 'hookaborted' );
1613                         $status->value = self::AS_HOOK_ERROR;
1614                         wfProfileOut( __METHOD__ . '-checks' );
1615                         wfProfileOut( __METHOD__ );
1616                         return $status;
1617                 } elseif ( $this->hookError != '' ) {
1618                         # ...or the hook could be expecting us to produce an error
1619                         $status->fatal( 'hookaborted' );
1620                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1621                         wfProfileOut( __METHOD__ . '-checks' );
1622                         wfProfileOut( __METHOD__ );
1623                         return $status;
1624                 }
1625
1626                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1627                         // Auto-block user's IP if the account was "hard" blocked
1628                         $wgUser->spreadAnyEditBlock();
1629                         # Check block state against master, thus 'false'.
1630                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1631                         wfProfileOut( __METHOD__ . '-checks' );
1632                         wfProfileOut( __METHOD__ );
1633                         return $status;
1634                 }
1635
1636                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1637                 if ( $this->kblength > $wgMaxArticleSize ) {
1638                         // Error will be displayed by showEditForm()
1639                         $this->tooBig = true;
1640                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1641                         wfProfileOut( __METHOD__ . '-checks' );
1642                         wfProfileOut( __METHOD__ );
1643                         return $status;
1644                 }
1645
1646                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1647                         if ( $wgUser->isAnon() ) {
1648                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1649                                 wfProfileOut( __METHOD__ . '-checks' );
1650                                 wfProfileOut( __METHOD__ );
1651                                 return $status;
1652                         } else {
1653                                 $status->fatal( 'readonlytext' );
1654                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1655                                 wfProfileOut( __METHOD__ . '-checks' );
1656                                 wfProfileOut( __METHOD__ );
1657                                 return $status;
1658                         }
1659                 }
1660
1661                 if ( $this->contentModel !== $this->mTitle->getContentModel()
1662                         && !$wgUser->isAllowed( 'editcontentmodel' )
1663                 ) {
1664                         $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1665                         wfProfileOut( __METHOD__ . '-checks' );
1666                         wfProfileOut( __METHOD__ );
1667                         return $status;
1668                 }
1669
1670                 if ( wfReadOnly() ) {
1671                         $status->fatal( 'readonlytext' );
1672                         $status->value = self::AS_READ_ONLY_PAGE;
1673                         wfProfileOut( __METHOD__ . '-checks' );
1674                         wfProfileOut( __METHOD__ );
1675                         return $status;
1676                 }
1677                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1678                         $status->fatal( 'actionthrottledtext' );
1679                         $status->value = self::AS_RATE_LIMITED;
1680                         wfProfileOut( __METHOD__ . '-checks' );
1681                         wfProfileOut( __METHOD__ );
1682                         return $status;
1683                 }
1684
1685                 # If the article has been deleted while editing, don't save it without
1686                 # confirmation
1687                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1688                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1689                         wfProfileOut( __METHOD__ . '-checks' );
1690                         wfProfileOut( __METHOD__ );
1691                         return $status;
1692                 }
1693
1694                 wfProfileOut( __METHOD__ . '-checks' );
1695
1696                 # Load the page data from the master. If anything changes in the meantime,
1697                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1698                 $this->mArticle->loadPageData( 'fromdbmaster' );
1699                 $new = !$this->mArticle->exists();
1700
1701                 if ( $new ) {
1702                         // Late check for create permission, just in case *PARANOIA*
1703                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1704                                 $status->fatal( 'nocreatetext' );
1705                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1706                                 wfDebug( __METHOD__ . ": no create permission\n" );
1707                                 wfProfileOut( __METHOD__ );
1708                                 return $status;
1709                         }
1710
1711                         // Don't save a new page if it's blank or if it's a MediaWiki:
1712                         // message with content equivalent to default (allow empty pages
1713                         // in this case to disable messages, see bug 50124)
1714                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1715                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1716                                 $defaultText = $defaultMessageText;
1717                         } else {
1718                                 $defaultText = '';
1719                         }
1720
1721                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1722                                 $this->blankArticle = true;
1723                                 $status->fatal( 'blankarticle' );
1724                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1725                                 wfProfileOut( __METHOD__ );
1726                                 return $status;
1727                         }
1728
1729                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1730                                 wfProfileOut( __METHOD__ );
1731                                 return $status;
1732                         }
1733
1734                         $content = $textbox_content;
1735
1736                         $result['sectionanchor'] = '';
1737                         if ( $this->section == 'new' ) {
1738                                 if ( $this->sectiontitle !== '' ) {
1739                                         // Insert the section title above the content.
1740                                         $content = $content->addSectionHeader( $this->sectiontitle );
1741                                 } elseif ( $this->summary !== '' ) {
1742                                         // Insert the section title above the content.
1743                                         $content = $content->addSectionHeader( $this->summary );
1744                                 }
1745                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1746                         }
1747
1748                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1749
1750                 } else { # not $new
1751
1752                         # Article exists. Check for edit conflict.
1753
1754                         $this->mArticle->clear(); # Force reload of dates, etc.
1755                         $timestamp = $this->mArticle->getTimestamp();
1756
1757                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1758
1759                         if ( $timestamp != $this->edittime ) {
1760                                 $this->isConflict = true;
1761                                 if ( $this->section == 'new' ) {
1762                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1763                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1764                                         ) {
1765                                                 // Probably a duplicate submission of a new comment.
1766                                                 // This can happen when squid resends a request after
1767                                                 // a timeout but the first one actually went through.
1768                                                 wfDebug( __METHOD__
1769                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1770                                         } else {
1771                                                 // New comment; suppress conflict.
1772                                                 $this->isConflict = false;
1773                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1774                                         }
1775                                 } elseif ( $this->section == ''
1776                                         && Revision::userWasLastToEdit(
1777                                                 DB_MASTER, $this->mTitle->getArticleID(),
1778                                                 $wgUser->getId(), $this->edittime
1779                                         )
1780                                 ) {
1781                                         # Suppress edit conflict with self, except for section edits where merging is required.
1782                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1783                                         $this->isConflict = false;
1784                                 }
1785                         }
1786
1787                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1788                         if ( $this->sectiontitle !== '' ) {
1789                                 $sectionTitle = $this->sectiontitle;
1790                         } else {
1791                                 $sectionTitle = $this->summary;
1792                         }
1793
1794                         $content = null;
1795
1796                         if ( $this->isConflict ) {
1797                                 wfDebug( __METHOD__
1798                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1799                                         . " (article time '{$timestamp}')\n" );
1800
1801                                 $content = $this->mArticle->replaceSectionContent(
1802                                         $this->section,
1803                                         $textbox_content,
1804                                         $sectionTitle,
1805                                         $this->edittime
1806                                 );
1807                         } else {
1808                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1809                                 $content = $this->mArticle->replaceSectionContent(
1810                                         $this->section,
1811                                         $textbox_content,
1812                                         $sectionTitle
1813                                 );
1814                         }
1815
1816                         if ( is_null( $content ) ) {
1817                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1818                                 $this->isConflict = true;
1819                                 $content = $textbox_content; // do not try to merge here!
1820                         } elseif ( $this->isConflict ) {
1821                                 # Attempt merge
1822                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1823                                         // Successful merge! Maybe we should tell the user the good news?
1824                                         $this->isConflict = false;
1825                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1826                                 } else {
1827                                         $this->section = '';
1828                                         $this->textbox1 = ContentHandler::getContentText( $content );
1829                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1830                                 }
1831                         }
1832
1833                         if ( $this->isConflict ) {
1834                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1835                                 wfProfileOut( __METHOD__ );
1836                                 return $status;
1837                         }
1838
1839                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1840                                 wfProfileOut( __METHOD__ );
1841                                 return $status;
1842                         }
1843
1844                         if ( $this->section == 'new' ) {
1845                                 // Handle the user preference to force summaries here
1846                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1847                                         $this->missingSummary = true;
1848                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1849                                         $status->value = self::AS_SUMMARY_NEEDED;
1850                                         wfProfileOut( __METHOD__ );
1851                                         return $status;
1852                                 }
1853
1854                                 // Do not allow the user to post an empty comment
1855                                 if ( $this->textbox1 == '' ) {
1856                                         $this->missingComment = true;
1857                                         $status->fatal( 'missingcommenttext' );
1858                                         $status->value = self::AS_TEXTBOX_EMPTY;
1859                                         wfProfileOut( __METHOD__ );
1860                                         return $status;
1861                                 }
1862                         } elseif ( !$this->allowBlankSummary
1863                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1864                                 && !$content->isRedirect()
1865                                 && md5( $this->summary ) == $this->autoSumm
1866                         ) {
1867                                 $this->missingSummary = true;
1868                                 $status->fatal( 'missingsummary' );
1869                                 $status->value = self::AS_SUMMARY_NEEDED;
1870                                 wfProfileOut( __METHOD__ );
1871                                 return $status;
1872                         }
1873
1874                         # All's well
1875                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1876                         $sectionanchor = '';
1877                         if ( $this->section == 'new' ) {
1878                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1879                         } elseif ( $this->section != '' ) {
1880                                 # Try to get a section anchor from the section source, redirect
1881                                 # to edited section if header found.
1882                                 # XXX: Might be better to integrate this into Article::replaceSection
1883                                 # for duplicate heading checking and maybe parsing.
1884                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1885                                 # We can't deal with anchors, includes, html etc in the header for now,
1886                                 # headline would need to be parsed to improve this.
1887                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1888                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1889                                 }
1890                         }
1891                         $result['sectionanchor'] = $sectionanchor;
1892                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1893
1894                         // Save errors may fall down to the edit form, but we've now
1895                         // merged the section into full text. Clear the section field
1896                         // so that later submission of conflict forms won't try to
1897                         // replace that into a duplicated mess.
1898                         $this->textbox1 = $this->toEditText( $content );
1899                         $this->section = '';
1900
1901                         $status->value = self::AS_SUCCESS_UPDATE;
1902                 }
1903
1904                 // Check for length errors again now that the section is merged in
1905                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1906                 if ( $this->kblength > $wgMaxArticleSize ) {
1907                         $this->tooBig = true;
1908                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1909                         wfProfileOut( __METHOD__ );
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                         wfProfileOut( __METHOD__ );
1940                         return $doEditStatus;
1941                 }
1942
1943                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1944                 if ( $result['nullEdit'] ) {
1945                         // We don't know if it was a null edit until now, so increment here
1946                         $wgUser->pingLimiter( 'linkpurge' );
1947                 }
1948                 $result['redirect'] = $content->isRedirect();
1949                 $this->updateWatchlist();
1950                 wfProfileOut( __METHOD__ );
1951                 return $status;
1952         }
1953
1954         /**
1955          * Register the change of watch status
1956          */
1957         protected function updateWatchlist() {
1958                 global $wgUser;
1959
1960                 if ( $wgUser->isLoggedIn()
1961                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1962                 ) {
1963                         $fname = __METHOD__;
1964                         $title = $this->mTitle;
1965                         $watch = $this->watchthis;
1966
1967                         // Do this in its own transaction to reduce contention...
1968                         $dbw = wfGetDB( DB_MASTER );
1969                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1970                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1971                         } );
1972                 }
1973         }
1974
1975         /**
1976          * Attempts to do 3-way merge of edit content with a base revision
1977          * and current content, in case of edit conflict, in whichever way appropriate
1978          * for the content type.
1979          *
1980          * @since 1.21
1981          *
1982          * @param Content $editContent
1983          *
1984          * @return bool
1985          */
1986         private function mergeChangesIntoContent( &$editContent ) {
1987                 wfProfileIn( __METHOD__ );
1988
1989                 $db = wfGetDB( DB_MASTER );
1990
1991                 // This is the revision the editor started from
1992                 $baseRevision = $this->getBaseRevision();
1993                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1994
1995                 if ( is_null( $baseContent ) ) {
1996                         wfProfileOut( __METHOD__ );
1997                         return false;
1998                 }
1999
2000                 // The current state, we want to merge updates into it
2001                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2002                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2003
2004                 if ( is_null( $currentContent ) ) {
2005                         wfProfileOut( __METHOD__ );
2006                         return false;
2007                 }
2008
2009                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2010
2011                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2012
2013                 if ( $result ) {
2014                         $editContent = $result;
2015                         wfProfileOut( __METHOD__ );
2016                         return true;
2017                 }
2018
2019                 wfProfileOut( __METHOD__ );
2020                 return false;
2021         }
2022
2023         /**
2024          * @return Revision
2025          */
2026         function getBaseRevision() {
2027                 if ( !$this->mBaseRevision ) {
2028                         $db = wfGetDB( DB_MASTER );
2029                         $this->mBaseRevision = Revision::loadFromTimestamp(
2030                                 $db, $this->mTitle, $this->edittime );
2031                 }
2032                 return $this->mBaseRevision;
2033         }
2034
2035         /**
2036          * Check given input text against $wgSpamRegex, and return the text of the first match.
2037          *
2038          * @param string $text
2039          *
2040          * @return string|bool Matching string or false
2041          */
2042         public static function matchSpamRegex( $text ) {
2043                 global $wgSpamRegex;
2044                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2045                 $regexes = (array)$wgSpamRegex;
2046                 return self::matchSpamRegexInternal( $text, $regexes );
2047         }
2048
2049         /**
2050          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2051          *
2052          * @param string $text
2053          *
2054          * @return string|bool Matching string or false
2055          */
2056         public static function matchSummarySpamRegex( $text ) {
2057                 global $wgSummarySpamRegex;
2058                 $regexes = (array)$wgSummarySpamRegex;
2059                 return self::matchSpamRegexInternal( $text, $regexes );
2060         }
2061
2062         /**
2063          * @param string $text
2064          * @param array $regexes
2065          * @return bool|string
2066          */
2067         protected static function matchSpamRegexInternal( $text, $regexes ) {
2068                 foreach ( $regexes as $regex ) {
2069                         $matches = array();
2070                         if ( preg_match( $regex, $text, $matches ) ) {
2071                                 return $matches[0];
2072                         }
2073                 }
2074                 return false;
2075         }
2076
2077         function setHeaders() {
2078                 global $wgOut, $wgUser, $wgAjaxEditStash;
2079
2080                 $wgOut->addModules( 'mediawiki.action.edit' );
2081                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2082
2083                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2084                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2085                 }
2086
2087                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2088                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2089                 }
2090
2091                 if ( $wgAjaxEditStash ) {
2092                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2093                 }
2094
2095                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2096
2097                 # Enabled article-related sidebar, toplinks, etc.
2098                 $wgOut->setArticleRelated( true );
2099
2100                 $contextTitle = $this->getContextTitle();
2101                 if ( $this->isConflict ) {
2102                         $msg = 'editconflict';
2103                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2104                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2105                 } else {
2106                         $msg = $contextTitle->exists()
2107                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2108                                         && $contextTitle->getDefaultMessageText() !== false
2109                                 )
2110                                 ? 'editing'
2111                                 : 'creating';
2112                 }
2113
2114                 # Use the title defined by DISPLAYTITLE magic word when present
2115                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2116                 if ( $displayTitle === false ) {
2117                         $displayTitle = $contextTitle->getPrefixedText();
2118                 }
2119                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2120         }
2121
2122         /**
2123          * Show all applicable editing introductions
2124          */
2125         protected function showIntro() {
2126                 global $wgOut, $wgUser;
2127                 if ( $this->suppressIntro ) {
2128                         return;
2129                 }
2130
2131                 $namespace = $this->mTitle->getNamespace();
2132
2133                 if ( $namespace == NS_MEDIAWIKI ) {
2134                         # Show a warning if editing an interface message
2135                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2136                         # If this is a default message (but not css or js),
2137                         # show a hint that it is translatable on translatewiki.net
2138                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2139                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2140                         ) {
2141                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2142                                 if ( $defaultMessageText !== false ) {
2143                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2144                                                 'translateinterface' );
2145                                 }
2146                         }
2147                 } elseif ( $namespace == NS_FILE ) {
2148                         # Show a hint to shared repo
2149                         $file = wfFindFile( $this->mTitle );
2150                         if ( $file && !$file->isLocal() ) {
2151                                 $descUrl = $file->getDescriptionUrl();
2152                                 # there must be a description url to show a hint to shared repo
2153                                 if ( $descUrl ) {
2154                                         if ( !$this->mTitle->exists() ) {
2155                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2156                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2157                                                 ) );
2158                                         } else {
2159                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2160                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2161                                                 ) );
2162                                         }
2163                                 }
2164                         }
2165                 }
2166
2167                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2168                 # Show log extract when the user is currently blocked
2169                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2170                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2171                         $username = $parts[0];
2172                         $user = User::newFromName( $username, false /* allow IP users*/ );
2173                         $ip = User::isIP( $username );
2174                         $block = Block::newFromTarget( $user, $user );
2175                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2176                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2177                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2178                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2179                                 # Show log extract if the user is currently blocked
2180                                 LogEventsList::showLogExtract(
2181                                         $wgOut,
2182                                         'block',
2183                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2184                                         '',
2185                                         array(
2186                                                 'lim' => 1,
2187                                                 'showIfEmpty' => false,
2188                                                 'msgKey' => array(
2189                                                         'blocked-notice-logextract',
2190                                                         $user->getName() # Support GENDER in notice
2191                                                 )
2192                                         )
2193                                 );
2194                         }
2195                 }
2196                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2197                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2198                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2199                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2200                         ) );
2201                         if ( $wgUser->isLoggedIn() ) {
2202                                 $wgOut->wrapWikiMsg(
2203                                         // Suppress the external link icon, consider the help url an internal one
2204                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2205                                         array(
2206                                                 'newarticletext',
2207                                                 $helpLink
2208                                         )
2209                                 );
2210                         } else {
2211                                 $wgOut->wrapWikiMsg(
2212                                         // Suppress the external link icon, consider the help url an internal one
2213                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2214                                         array(
2215                                                 'newarticletextanon',
2216                                                 $helpLink
2217                                         )
2218                                 );
2219                         }
2220                 }
2221                 # Give a notice if the user is editing a deleted/moved page...
2222                 if ( !$this->mTitle->exists() ) {
2223                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2224                                 '',
2225                                 array(
2226                                         'lim' => 10,
2227                                         'conds' => array( "log_action != 'revision'" ),
2228                                         'showIfEmpty' => false,
2229                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2230                                 )
2231                         );
2232                 }
2233         }
2234
2235         /**
2236          * Attempt to show a custom editing introduction, if supplied
2237          *
2238          * @return bool
2239          */
2240         protected function showCustomIntro() {
2241                 if ( $this->editintro ) {
2242                         $title = Title::newFromText( $this->editintro );
2243                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2244                                 global $wgOut;
2245                                 // Added using template syntax, to take <noinclude>'s into account.
2246                                 $wgOut->addWikiTextTitleTidy(
2247                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2248                                         $this->mTitle
2249                                 );
2250                                 return true;
2251                         }
2252                 }
2253                 return false;
2254         }
2255
2256         /**
2257          * Gets an editable textual representation of $content.
2258          * The textual representation can be turned by into a Content object by the
2259          * toEditContent() method.
2260          *
2261          * If $content is null or false or a string, $content is returned unchanged.
2262          *
2263          * If the given Content object is not of a type that can be edited using
2264          * the text base EditPage, an exception will be raised. Set
2265          * $this->allowNonTextContent to true to allow editing of non-textual
2266          * content.
2267          *
2268          * @param Content|null|bool|string $content
2269          * @return string The editable text form of the content.
2270          *
2271          * @throws MWException If $content is not an instance of TextContent and
2272          *   $this->allowNonTextContent is not true.
2273          */
2274         protected function toEditText( $content ) {
2275                 if ( $content === null || $content === false || is_string( $content ) ) {
2276                         return $content;
2277                 }
2278
2279                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2280                         throw new MWException( 'This content model is not supported: '
2281                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2282                 }
2283
2284                 return $content->serialize( $this->contentFormat );
2285         }
2286
2287         /**
2288          * Turns the given text into a Content object by unserializing it.
2289          *
2290          * If the resulting Content object is not of a type that can be edited using
2291          * the text base EditPage, an exception will be raised. Set
2292          * $this->allowNonTextContent to true to allow editing of non-textual
2293          * content.
2294          *
2295          * @param string|null|bool $text Text to unserialize
2296          * @return Content The content object created from $text. If $text was false
2297          *   or null, false resp. null will be  returned instead.
2298          *
2299          * @throws MWException If unserializing the text results in a Content
2300          *   object that is not an instance of TextContent and
2301          *   $this->allowNonTextContent is not true.
2302          */
2303         protected function toEditContent( $text ) {
2304                 if ( $text === false || $text === null ) {
2305                         return $text;
2306                 }
2307
2308                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2309                         $this->contentModel, $this->contentFormat );
2310
2311                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2312                         throw new MWException( 'This content model is not supported: '
2313                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2314                 }
2315
2316                 return $content;
2317         }
2318
2319         /**
2320          * Send the edit form and related headers to $wgOut
2321          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2322          *     during form output near the top, for captchas and the like.
2323          */
2324         function showEditForm( $formCallback = null ) {
2325                 global $wgOut, $wgUser;
2326
2327                 wfProfileIn( __METHOD__ );
2328
2329                 # need to parse the preview early so that we know which templates are used,
2330                 # otherwise users with "show preview after edit box" will get a blank list
2331                 # we parse this near the beginning so that setHeaders can do the title
2332                 # setting work instead of leaving it in getPreviewText
2333                 $previewOutput = '';
2334                 if ( $this->formtype == 'preview' ) {
2335                         $previewOutput = $this->getPreviewText();
2336                 }
2337
2338                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2339
2340                 $this->setHeaders();
2341
2342                 if ( $this->showHeader() === false ) {
2343                         wfProfileOut( __METHOD__ );
2344                         return;
2345                 }
2346
2347                 $wgOut->addHTML( $this->editFormPageTop );
2348
2349                 if ( $wgUser->getOption( 'previewontop' ) ) {
2350                         $this->displayPreviewArea( $previewOutput, true );
2351                 }
2352
2353                 $wgOut->addHTML( $this->editFormTextTop );
2354
2355                 $showToolbar = true;
2356                 if ( $this->wasDeletedSinceLastEdit() ) {
2357                         if ( $this->formtype == 'save' ) {
2358                                 // Hide the toolbar and edit area, user can click preview to get it back
2359                                 // Add an confirmation checkbox and explanation.
2360                                 $showToolbar = false;
2361                         } else {
2362                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2363                                         'deletedwhileediting' );
2364                         }
2365                 }
2366
2367                 // @todo add EditForm plugin interface and use it here!
2368                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2369                 $wgOut->addHTML( Html::openElement(
2370                         'form',
2371                         array(
2372                                 'id' => self::EDITFORM_ID,
2373                                 'name' => self::EDITFORM_ID,
2374                                 'method' => 'post',
2375                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2376                                 'enctype' => 'multipart/form-data'
2377                         )
2378                 ) );
2379
2380                 if ( is_callable( $formCallback ) ) {
2381                         call_user_func_array( $formCallback, array( &$wgOut ) );
2382                 }
2383
2384                 // Add an empty field to trip up spambots
2385                 $wgOut->addHTML(
2386                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2387                         . Html::rawElement(
2388                                 'label',
2389                                 array( 'for' => 'wpAntiSpam' ),
2390                                 wfMessage( 'simpleantispam-label' )->parse()
2391                         )
2392                         . Xml::element(
2393                                 'input',
2394                                 array(
2395                                         'type' => 'text',
2396                                         'name' => 'wpAntispam',
2397                                         'id' => 'wpAntispam',
2398                                         'value' => ''
2399                                 )
2400                         )
2401                         . Xml::closeElement( 'div' )
2402                 );
2403
2404                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2405
2406                 // Put these up at the top to ensure they aren't lost on early form submission
2407                 $this->showFormBeforeText();
2408
2409                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2410                         $username = $this->lastDelete->user_name;
2411                         $comment = $this->lastDelete->log_comment;
2412
2413                         // It is better to not parse the comment at all than to have templates expanded in the middle
2414                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2415                         $key = $comment === ''
2416                                 ? 'confirmrecreate-noreason'
2417                                 : 'confirmrecreate';
2418                         $wgOut->addHTML(
2419                                 '<div class="mw-confirm-recreate">' .
2420                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2421                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2422                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2423                                 ) .
2424                                 '</div>'
2425                         );
2426                 }
2427
2428                 # When the summary is hidden, also hide them on preview/show changes
2429                 if ( $this->nosummary ) {
2430                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2431                 }
2432
2433                 # If a blank edit summary was previously provided, and the appropriate
2434                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2435                 # user being bounced back more than once in the event that a summary
2436                 # is not required.
2437                 #####
2438                 # For a bit more sophisticated detection of blank summaries, hash the
2439                 # automatic one and pass that in the hidden field wpAutoSummary.
2440                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2441                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2442                 }
2443
2444                 if ( $this->undidRev ) {
2445                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2446                 }
2447
2448                 if ( $this->hasPresetSummary ) {
2449                         // If a summary has been preset using &summary= we don't want to prompt for
2450                         // a different summary. Only prompt for a summary if the summary is blanked.
2451                         // (Bug 17416)
2452                         $this->autoSumm = md5( '' );
2453                 }
2454
2455                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2456                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2457
2458                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2459                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2460                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2461
2462                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2463                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2464
2465                 if ( $this->section == 'new' ) {
2466                         $this->showSummaryInput( true, $this->summary );
2467                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2468                 }
2469
2470                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2471
2472                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2473                         $wgOut->addHTML( EditPage::getEditToolbar() );
2474                 }
2475
2476                 if ( $this->blankArticle ) {
2477                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2478                 }
2479
2480                 if ( $this->isConflict ) {
2481                         // In an edit conflict bypass the overridable content form method
2482                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2483                         // resolved between page source edits and custom ui edits using the
2484                         // custom edit ui.
2485                         $this->textbox2 = $this->textbox1;
2486
2487                         $content = $this->getCurrentContent();
2488                         $this->textbox1 = $this->toEditText( $content );
2489
2490                         $this->showTextbox1();
2491                 } else {
2492                         $this->showContentForm();
2493                 }
2494
2495                 $wgOut->addHTML( $this->editFormTextAfterContent );
2496
2497                 $this->showStandardInputs();
2498
2499                 $this->showFormAfterText();
2500
2501                 $this->showTosSummary();
2502
2503                 $this->showEditTools();
2504
2505                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2506
2507                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2508                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2509
2510                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2511                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2512
2513                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2514                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2515
2516                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2517
2518                 if ( $this->isConflict ) {
2519                         try {
2520                                 $this->showConflict();
2521                         } catch ( MWContentSerializationException $ex ) {
2522                                 // this can't really happen, but be nice if it does.
2523                                 $msg = wfMessage(
2524                                         'content-failed-to-parse',
2525                                         $this->contentModel,
2526                                         $this->contentFormat,
2527                                         $ex->getMessage()
2528                                 );
2529                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2530                         }
2531                 }
2532
2533                 // Marker for detecting truncated form data.  This must be the last
2534                 // parameter sent in order to be of use, so do not move me.
2535                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2536                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2537
2538                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2539                         $this->displayPreviewArea( $previewOutput, false );
2540                 }
2541
2542                 wfProfileOut( __METHOD__ );
2543         }
2544
2545         /**
2546          * Extract the section title from current section text, if any.
2547          *
2548          * @param string $text
2549          * @return string|bool String or false
2550          */
2551         public static function extractSectionTitle( $text ) {
2552                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2553                 if ( !empty( $matches[2] ) ) {
2554                         global $wgParser;
2555                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2556                 } else {
2557                         return false;
2558                 }
2559         }
2560
2561         /**
2562          * @return bool
2563          */
2564         protected function showHeader() {
2565                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2566                 global $wgAllowUserCss, $wgAllowUserJs;
2567
2568                 if ( $this->mTitle->isTalkPage() ) {
2569                         $wgOut->addWikiMsg( 'talkpagetext' );
2570                 }
2571
2572                 // Add edit notices
2573                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2574
2575                 if ( $this->isConflict ) {
2576                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2577                         $this->edittime = $this->mArticle->getTimestamp();
2578                 } else {
2579                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2580                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2581                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2582                                 // Someone is welcome to try refactoring though
2583                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2584                                 return false;
2585                         }
2586
2587                         if ( $this->section != '' && $this->section != 'new' ) {
2588                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2589                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2590                                         if ( $sectionTitle !== false ) {
2591                                                 $this->summary = "/* $sectionTitle */ ";
2592                                         }
2593                                 }
2594                         }
2595
2596                         if ( $this->missingComment ) {
2597                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2598                         }
2599
2600                         if ( $this->missingSummary && $this->section != 'new' ) {
2601                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2602                         }
2603
2604                         if ( $this->missingSummary && $this->section == 'new' ) {
2605                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2606                         }
2607
2608                         if ( $this->blankArticle ) {
2609                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2610                         }
2611
2612                         if ( $this->hookError !== '' ) {
2613                                 $wgOut->addWikiText( $this->hookError );
2614                         }
2615
2616                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2617                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2618                         }
2619
2620                         if ( $this->section != 'new' ) {
2621                                 $revision = $this->mArticle->getRevisionFetched();
2622                                 if ( $revision ) {
2623                                         // Let sysop know that this will make private content public if saved
2624
2625                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2626                                                 $wgOut->wrapWikiMsg(
2627                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2628                                                         'rev-deleted-text-permission'
2629                                                 );
2630                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2631                                                 $wgOut->wrapWikiMsg(
2632                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2633                                                         'rev-deleted-text-view'
2634                                                 );
2635                                         }
2636
2637                                         if ( !$revision->isCurrent() ) {
2638                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2639                                                 $wgOut->addWikiMsg( 'editingold' );
2640                                         }
2641                                 } elseif ( $this->mTitle->exists() ) {
2642                                         // Something went wrong
2643
2644                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2645                                                 array( 'missing-revision', $this->oldid ) );
2646                                 }
2647                         }
2648                 }
2649
2650                 if ( wfReadOnly() ) {
2651                         $wgOut->wrapWikiMsg(
2652                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2653                                 array( 'readonlywarning', wfReadOnlyReason() )
2654                         );
2655                 } elseif ( $wgUser->isAnon() ) {
2656                         if ( $this->formtype != 'preview' ) {
2657                                 $wgOut->wrapWikiMsg(
2658                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2659                                         array( 'anoneditwarning',
2660                                                 // Log-in link
2661                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2662                                                 // Sign-up link
2663                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2664                                 );
2665                         } else {
2666                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2667                                         'anonpreviewwarning'
2668                                 );
2669                         }
2670                 } else {
2671                         if ( $this->isCssJsSubpage ) {
2672                                 # Check the skin exists
2673                                 if ( $this->isWrongCaseCssJsPage ) {
2674                                         $wgOut->wrapWikiMsg(
2675                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2676                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2677                                         );
2678                                 }
2679                                 if ( $this->formtype !== 'preview' ) {
2680                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2681                                                 $wgOut->wrapWikiMsg(
2682                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2683                                                         array( 'usercssyoucanpreview' )
2684                                                 );
2685                                         }
2686
2687                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2688                                                 $wgOut->wrapWikiMsg(
2689                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2690                                                         array( 'userjsyoucanpreview' )
2691                                                 );
2692                                         }
2693                                 }
2694                         }
2695                 }
2696
2697                 if ( $this->mTitle->isProtected( 'edit' ) &&
2698                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2699                 ) {
2700                         # Is the title semi-protected?
2701                         if ( $this->mTitle->isSemiProtected() ) {
2702                                 $noticeMsg = 'semiprotectedpagewarning';
2703                         } else {
2704                                 # Then it must be protected based on static groups (regular)
2705                                 $noticeMsg = 'protectedpagewarning';
2706                         }
2707                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2708                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2709                 }
2710                 if ( $this->mTitle->isCascadeProtected() ) {
2711                         # Is this page under cascading protection from some source pages?
2712                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2713                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2714                         $cascadeSourcesCount = count( $cascadeSources );
2715                         if ( $cascadeSourcesCount > 0 ) {
2716                                 # Explain, and list the titles responsible
2717                                 foreach ( $cascadeSources as $page ) {
2718                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2719                                 }
2720                         }
2721                         $notice .= '</div>';
2722                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2723                 }
2724                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2725                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2726                                 array( 'lim' => 1,
2727                                         'showIfEmpty' => false,
2728                                         'msgKey' => array( 'titleprotectedwarning' ),
2729                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2730                 }
2731
2732                 if ( $this->kblength === false ) {
2733                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2734                 }
2735
2736                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2737                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2738                                 array(
2739                                         'longpageerror',
2740                                         $wgLang->formatNum( $this->kblength ),
2741                                         $wgLang->formatNum( $wgMaxArticleSize )
2742                                 )
2743                         );
2744                 } else {
2745                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2746                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2747                                         array(
2748                                                 'longpage-hint',
2749                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2750                                                 strlen( $this->textbox1 )
2751                                         )
2752                                 );
2753                         }
2754                 }
2755                 # Add header copyright warning
2756                 $this->showHeaderCopyrightWarning();
2757
2758                 return true;
2759         }
2760
2761         /**
2762          * Standard summary input and label (wgSummary), abstracted so EditPage
2763          * subclasses may reorganize the form.
2764          * Note that you do not need to worry about the label's for=, it will be
2765          * inferred by the id given to the input. You can remove them both by
2766          * passing array( 'id' => false ) to $userInputAttrs.
2767          *
2768          * @param string $summary The value of the summary input
2769          * @param string $labelText The html to place inside the label
2770          * @param array $inputAttrs Array of attrs to use on the input
2771          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2772          *
2773          * @return array An array in the format array( $label, $input )
2774          */
2775         function getSummaryInput( $summary = "", $labelText = null,
2776                 $inputAttrs = null, $spanLabelAttrs = null
2777         ) {
2778                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2779                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2780                         'id' => 'wpSummary',
2781                         'maxlength' => '200',
2782                         'tabindex' => '1',
2783                         'size' => 60,
2784                         'spellcheck' => 'true',
2785                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2786
2787                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2788                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2789                         'id' => "wpSummaryLabel"
2790                 );
2791
2792                 $label = null;
2793                 if ( $labelText ) {
2794                         $label = Xml::tags(
2795                                 'label',
2796                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2797                                 $labelText
2798                         );
2799                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2800                 }
2801
2802                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2803
2804                 return array( $label, $input );
2805         }
2806
2807         /**
2808          * @param bool $isSubjectPreview True if this is the section subject/title
2809          *   up top, or false if this is the comment summary
2810          *   down below the textarea
2811          * @param string $summary The text of the summary to display
2812          */
2813         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2814                 global $wgOut, $wgContLang;
2815                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2816                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2817                 if ( $isSubjectPreview ) {
2818                         if ( $this->nosummary ) {
2819                                 return;
2820                         }
2821                 } else {
2822                         if ( !$this->mShowSummaryField ) {
2823                                 return;
2824                         }
2825                 }
2826                 $summary = $wgContLang->recodeForEdit( $summary );
2827                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2828                 list( $label, $input ) = $this->getSummaryInput(
2829                         $summary,
2830                         $labelText,
2831                         array( 'class' => $summaryClass ),
2832                         array()
2833                 );
2834                 $wgOut->addHTML( "{$label} {$input}" );
2835         }
2836
2837         /**
2838          * @param bool $isSubjectPreview True if this is the section subject/title
2839          *   up top, or false if this is the comment summary
2840          *   down below the textarea
2841          * @param string $summary The text of the summary to display
2842          * @return string
2843          */
2844         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2845                 // avoid spaces in preview, gets always trimmed on save
2846                 $summary = trim( $summary );
2847                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2848                         return "";
2849                 }
2850
2851                 global $wgParser;
2852
2853                 if ( $isSubjectPreview ) {
2854                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2855                                 ->inContentLanguage()->text();
2856                 }
2857
2858                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2859
2860                 $summary = wfMessage( $message )->parse()
2861                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2862                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2863         }
2864
2865         protected function showFormBeforeText() {
2866                 global $wgOut;
2867                 $section = htmlspecialchars( $this->section );
2868                 $wgOut->addHTML( <<<HTML
2869 <input type='hidden' value="{$section}" name="wpSection"/>
2870 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2871 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2872 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2873
2874 HTML
2875                 );
2876                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2877                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2878                 }
2879         }
2880
2881         protected function showFormAfterText() {
2882                 global $wgOut, $wgUser;
2883                 /**
2884                  * To make it harder for someone to slip a user a page
2885                  * which submits an edit form to the wiki without their
2886                  * knowledge, a random token is associated with the login
2887                  * session. If it's not passed back with the submission,
2888                  * we won't save the page, or render user JavaScript and
2889                  * CSS previews.
2890                  *
2891                  * For anon editors, who may not have a session, we just
2892                  * include the constant suffix to prevent editing from
2893                  * broken text-mangling proxies.
2894                  */
2895                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2896         }
2897
2898         /**
2899          * Subpage overridable method for printing the form for page content editing
2900          * By default this simply outputs wpTextbox1
2901          * Subclasses can override this to provide a custom UI for editing;
2902          * be it a form, or simply wpTextbox1 with a modified content that will be
2903          * reverse modified when extracted from the post data.
2904          * Note that this is basically the inverse for importContentFormData
2905          */
2906         protected function showContentForm() {
2907                 $this->showTextbox1();
2908         }
2909
2910         /**
2911          * Method to output wpTextbox1
2912          * The $textoverride method can be used by subclasses overriding showContentForm
2913          * to pass back to this method.
2914          *
2915          * @param array $customAttribs Array of html attributes to use in the textarea
2916          * @param string $textoverride Optional text to override $this->textarea1 with
2917          */
2918         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2919                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2920                         $attribs = array( 'style' => 'display:none;' );
2921                 } else {
2922                         $classes = array(); // Textarea CSS
2923                         if ( $this->mTitle->isProtected( 'edit' ) &&
2924                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2925                         ) {
2926                                 # Is the title semi-protected?
2927                                 if ( $this->mTitle->isSemiProtected() ) {
2928                                         $classes[] = 'mw-textarea-sprotected';
2929                                 } else {
2930                                         # Then it must be protected based on static groups (regular)
2931                                         $classes[] = 'mw-textarea-protected';
2932                                 }
2933                                 # Is the title cascade-protected?
2934                                 if ( $this->mTitle->isCascadeProtected() ) {
2935                                         $classes[] = 'mw-textarea-cprotected';
2936                                 }
2937                         }
2938
2939                         $attribs = array( 'tabindex' => 1 );
2940
2941                         if ( is_array( $customAttribs ) ) {
2942                                 $attribs += $customAttribs;
2943                         }
2944
2945                         if ( count( $classes ) ) {
2946                                 if ( isset( $attribs['class'] ) ) {
2947                                         $classes[] = $attribs['class'];
2948                                 }
2949                                 $attribs['class'] = implode( ' ', $classes );
2950                         }
2951                 }
2952
2953                 $this->showTextbox(
2954                         $textoverride !== null ? $textoverride : $this->textbox1,
2955                         'wpTextbox1',
2956                         $attribs
2957                 );
2958         }
2959
2960         protected function showTextbox2() {
2961                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2962         }
2963
2964         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2965                 global $wgOut, $wgUser;
2966
2967                 $wikitext = $this->safeUnicodeOutput( $text );
2968                 if ( strval( $wikitext ) !== '' ) {
2969                         // Ensure there's a newline at the end, otherwise adding lines
2970                         // is awkward.
2971                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2972                         // mode will show an extra newline. A bit annoying.
2973                         $wikitext .= "\n";
2974                 }
2975
2976                 $attribs = $customAttribs + array(
2977                         'accesskey' => ',',
2978                         'id' => $name,
2979                         'cols' => $wgUser->getIntOption( 'cols' ),
2980                         'rows' => $wgUser->getIntOption( 'rows' ),
2981                         // Avoid PHP notices when appending preferences
2982                         // (appending allows customAttribs['style'] to still work).
2983                         'style' => ''
2984                 );
2985
2986                 $pageLang = $this->mTitle->getPageLanguage();
2987                 $attribs['lang'] = $pageLang->getHtmlCode();
2988                 $attribs['dir'] = $pageLang->getDir();
2989
2990                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2991         }
2992
2993         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2994                 global $wgOut;
2995                 $classes = array();
2996                 if ( $isOnTop ) {
2997                         $classes[] = 'ontop';
2998                 }
2999
3000                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3001
3002                 if ( $this->formtype != 'preview' ) {
3003                         $attribs['style'] = 'display: none;';
3004                 }
3005
3006                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3007
3008                 if ( $this->formtype == 'preview' ) {
3009                         $this->showPreview( $previewOutput );
3010                 }
3011
3012                 $wgOut->addHTML( '</div>' );
3013
3014                 if ( $this->formtype == 'diff' ) {
3015                         try {
3016                                 $this->showDiff();
3017                         } catch ( MWContentSerializationException $ex ) {
3018                                 $msg = wfMessage(
3019                                         'content-failed-to-parse',
3020                                         $this->contentModel,
3021                                         $this->contentFormat,
3022                                         $ex->getMessage()
3023                                 );
3024                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3025                         }
3026                 }
3027         }
3028
3029         /**
3030          * Append preview output to $wgOut.
3031          * Includes category rendering if this is a category page.
3032          *
3033          * @param string $text The HTML to be output for the preview.
3034          */
3035         protected function showPreview( $text ) {
3036                 global $wgOut;
3037                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3038                         $this->mArticle->openShowCategory();
3039                 }
3040                 # This hook seems slightly odd here, but makes things more
3041                 # consistent for extensions.
3042                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3043                 $wgOut->addHTML( $text );
3044                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3045                         $this->mArticle->closeShowCategory();
3046                 }
3047         }
3048
3049         /**
3050          * Get a diff between the current contents of the edit box and the
3051          * version of the page we're editing from.
3052          *
3053          * If this is a section edit, we'll replace the section as for final
3054          * save and then make a comparison.
3055          */
3056         function showDiff() {
3057                 global $wgUser, $wgContLang, $wgOut;
3058
3059                 $oldtitlemsg = 'currentrev';
3060                 # if message does not exist, show diff against the preloaded default
3061                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3062                         $oldtext = $this->mTitle->getDefaultMessageText();
3063                         if ( $oldtext !== false ) {
3064                                 $oldtitlemsg = 'defaultmessagetext';
3065                                 $oldContent = $this->toEditContent( $oldtext );
3066                         } else {
3067                                 $oldContent = null;
3068                         }
3069                 } else {
3070                         $oldContent = $this->getCurrentContent();
3071                 }
3072
3073                 $textboxContent = $this->toEditContent( $this->textbox1 );
3074
3075                 $newContent = $this->mArticle->replaceSectionContent(
3076                                                         $this->section, $textboxContent,
3077                                                         $this->summary, $this->edittime );
3078
3079                 if ( $newContent ) {
3080                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3081                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3082
3083                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3084                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3085                 }
3086
3087                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3088                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3089                         $newtitle = wfMessage( 'yourtext' )->parse();
3090
3091                         if ( !$oldContent ) {
3092                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3093                         }
3094
3095                         if ( !$newContent ) {
3096                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3097                         }
3098
3099                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3100                         $de->setContent( $oldContent, $newContent );
3101
3102                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3103                         $de->showDiffStyle();
3104                 } else {
3105                         $difftext = '';
3106                 }
3107
3108                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3109         }
3110
3111         /**
3112          * Show the header copyright warning.
3113          */
3114         protected function showHeaderCopyrightWarning() {
3115                 $msg = 'editpage-head-copy-warn';
3116                 if ( !wfMessage( $msg )->isDisabled() ) {
3117                         global $wgOut;
3118                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3119                                 'editpage-head-copy-warn' );
3120                 }
3121         }
3122
3123         /**
3124          * Give a chance for site and per-namespace customizations of
3125          * terms of service summary link that might exist separately
3126          * from the copyright notice.
3127          *
3128          * This will display between the save button and the edit tools,
3129          * so should remain short!
3130          */
3131         protected function showTosSummary() {
3132                 $msg = 'editpage-tos-summary';
3133                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3134                 if ( !wfMessage( $msg )->isDisabled() ) {
3135                         global $wgOut;
3136                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3137                         $wgOut->addWikiMsg( $msg );
3138                         $wgOut->addHTML( '</div>' );
3139                 }
3140         }
3141
3142         protected function showEditTools() {
3143                 global $wgOut;
3144                 $wgOut->addHTML( '<div class="mw-editTools">' .
3145                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3146                         '</div>' );
3147         }
3148
3149         /**
3150          * Get the copyright warning
3151          *
3152          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3153          * @return string
3154          */
3155         protected function getCopywarn() {
3156                 return self::getCopyrightWarning( $this->mTitle );
3157         }
3158
3159         /**
3160          * Get the copyright warning, by default returns wikitext
3161          *
3162          * @param Title $title
3163          * @param string $format Output format, valid values are any function of a Message object
3164          * @return string
3165          */
3166         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3167                 global $wgRightsText;
3168                 if ( $wgRightsText ) {
3169                         $copywarnMsg = array( 'copyrightwarning',
3170                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3171                                 $wgRightsText );
3172                 } else {
3173                         $copywarnMsg = array( 'copyrightwarning2',
3174                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3175                 }
3176                 // Allow for site and per-namespace customization of contribution/copyright notice.
3177                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3178
3179                 return "<div id=\"editpage-copywarn\">\n" .
3180                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3181         }
3182
3183         /**
3184          * Get the Limit report for page previews
3185          *
3186          * @since 1.22
3187          * @param ParserOutput $output ParserOutput object from the parse
3188          * @return string HTML
3189          */
3190         public static function getPreviewLimitReport( $output ) {
3191                 if ( !$output || !$output->getLimitReportData() ) {
3192                         return '';
3193                 }
3194
3195                 wfProfileIn( __METHOD__ );
3196
3197                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3198                         wfMessage( 'limitreport-title' )->parseAsBlock()
3199                 );
3200
3201                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3202                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3203
3204                 $limitReport .= Html::openElement( 'table', array(
3205                         'class' => 'preview-limit-report wikitable'
3206                 ) ) .
3207                         Html::openElement( 'tbody' );
3208
3209                 foreach ( $output->getLimitReportData() as $key => $value ) {
3210                         if ( wfRunHooks( 'ParserLimitReportFormat',
3211                                 array( $key, &$value, &$limitReport, true, true )
3212                         ) ) {
3213                                 $keyMsg = wfMessage( $key );
3214                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3215                                 if ( !$valueMsg->exists() ) {
3216                                         $valueMsg = new RawMessage( '$1' );
3217                                 }
3218                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3219                                         $limitReport .= Html::openElement( 'tr' ) .
3220                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3221                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3222                                                 Html::closeElement( 'tr' );
3223                                 }
3224                         }
3225                 }
3226
3227                 $limitReport .= Html::closeElement( 'tbody' ) .
3228                         Html::closeElement( 'table' ) .
3229                         Html::closeElement( 'div' );
3230
3231                 wfProfileOut( __METHOD__ );
3232
3233                 return $limitReport;
3234         }
3235
3236         protected function showStandardInputs( &$tabindex = 2 ) {
3237                 global $wgOut;
3238                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3239
3240                 if ( $this->section != 'new' ) {
3241                         $this->showSummaryInput( false, $this->summary );
3242                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3243                 }
3244
3245                 $checkboxes = $this->getCheckboxes( $tabindex,
3246                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3247                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3248
3249                 // Show copyright warning.
3250                 $wgOut->addWikiText( $this->getCopywarn() );
3251                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3252
3253                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3254                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3255
3256                 $cancel = $this->getCancelLink();
3257                 if ( $cancel !== '' ) {
3258                         $cancel .= Html::element( 'span',
3259                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3260                                 wfMessage( 'pipe-separator' )->text() );
3261                 }
3262
3263                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3264                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3265                 $attrs = array(
3266                         'target' => 'helpwindow',
3267                         'href' => $edithelpurl,
3268                 );
3269                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3270                         $attrs, array( 'mw-ui-quiet' ) ) .
3271                         wfMessage( 'word-separator' )->escaped() .
3272                         wfMessage( 'newwindow' )->parse();
3273
3274                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3275                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3276                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3277
3278                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3279
3280                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3281         }
3282
3283         /**
3284          * Show an edit conflict. textbox1 is already shown in showEditForm().
3285          * If you want to use another entry point to this function, be careful.
3286          */
3287         protected function showConflict() {
3288                 global $wgOut;
3289
3290                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3291                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3292
3293                         $content1 = $this->toEditContent( $this->textbox1 );
3294                         $content2 = $this->toEditContent( $this->textbox2 );
3295
3296                         $handler = ContentHandler::getForModelID( $this->contentModel );
3297                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3298                         $de->setContent( $content2, $content1 );
3299                         $de->showDiff(
3300                                 wfMessage( 'yourtext' )->parse(),
3301                                 wfMessage( 'storedversion' )->text()
3302                         );
3303
3304                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3305                         $this->showTextbox2();
3306                 }
3307         }
3308
3309         /**
3310          * @return string
3311          */
3312         public function getCancelLink() {
3313                 $cancelParams = array();
3314                 if ( !$this->isConflict && $this->oldid > 0 ) {
3315                         $cancelParams['oldid'] = $this->oldid;
3316                 }
3317                 $attrs = array( 'id' => 'mw-editform-cancel' );
3318
3319                 return Linker::linkKnown(
3320                         $this->getContextTitle(),
3321                         wfMessage( 'cancel' )->parse(),
3322                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3323                         $cancelParams
3324                 );
3325         }
3326
3327         /**
3328          * Returns the URL to use in the form's action attribute.
3329          * This is used by EditPage subclasses when simply customizing the action
3330          * variable in the constructor is not enough. This can be used when the
3331          * EditPage lives inside of a Special page rather than a custom page action.
3332          *
3333          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3334          * @return string
3335          */
3336         protected function getActionURL( Title $title ) {
3337                 return $title->getLocalURL( array( 'action' => $this->action ) );
3338         }
3339
3340         /**
3341          * Check if a page was deleted while the user was editing it, before submit.
3342          * Note that we rely on the logging table, which hasn't been always there,
3343          * but that doesn't matter, because this only applies to brand new
3344          * deletes.
3345          * @return bool
3346          */
3347         protected function wasDeletedSinceLastEdit() {
3348                 if ( $this->deletedSinceEdit !== null ) {
3349                         return $this->deletedSinceEdit;
3350                 }
3351
3352                 $this->deletedSinceEdit = false;
3353
3354                 if ( $this->mTitle->isDeletedQuick() ) {
3355                         $this->lastDelete = $this->getLastDelete();
3356                         if ( $this->lastDelete ) {
3357                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3358                                 if ( $deleteTime > $this->starttime ) {
3359                                         $this->deletedSinceEdit = true;
3360                                 }
3361                         }
3362                 }
3363
3364                 return $this->deletedSinceEdit;
3365         }
3366
3367         /**
3368          * @return bool|stdClass
3369          */
3370         protected function getLastDelete() {
3371                 $dbr = wfGetDB( DB_SLAVE );
3372                 $data = $dbr->selectRow(
3373                         array( 'logging', 'user' ),
3374                         array(
3375                                 'log_type',
3376                                 'log_action',
3377                                 'log_timestamp',
3378                                 'log_user',
3379                                 'log_namespace',
3380                                 'log_title',
3381                                 'log_comment',
3382                                 'log_params',
3383                                 'log_deleted',
3384                                 'user_name'
3385                         ), array(
3386                                 'log_namespace' => $this->mTitle->getNamespace(),
3387                                 'log_title' => $this->mTitle->getDBkey(),
3388                                 'log_type' => 'delete',
3389                                 'log_action' => 'delete',
3390                                 'user_id=log_user'
3391                         ),
3392                         __METHOD__,
3393                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3394                 );
3395                 // Quick paranoid permission checks...
3396                 if ( is_object( $data ) ) {
3397                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3398                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3399                         }
3400
3401                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3402                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3403                         }
3404                 }
3405
3406                 return $data;
3407         }
3408
3409         /**
3410          * Get the rendered text for previewing.
3411          * @throws MWException
3412          * @return string
3413          */
3414         function getPreviewText() {
3415                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3416                 global $wgAllowUserCss, $wgAllowUserJs;
3417
3418                 wfProfileIn( __METHOD__ );
3419
3420                 if ( $wgRawHtml && !$this->mTokenOk ) {
3421                         // Could be an offsite preview attempt. This is very unsafe if
3422                         // HTML is enabled, as it could be an attack.
3423                         $parsedNote = '';
3424                         if ( $this->textbox1 !== '' ) {
3425                                 // Do not put big scary notice, if previewing the empty
3426                                 // string, which happens when you initially edit
3427                                 // a category page, due to automatic preview-on-open.
3428                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3429                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3430                         }
3431                         wfProfileOut( __METHOD__ );
3432                         return $parsedNote;
3433                 }
3434
3435                 $note = '';
3436
3437                 try {
3438                         $content = $this->toEditContent( $this->textbox1 );
3439
3440                         $previewHTML = '';
3441                         if ( !wfRunHooks(
3442                                 'AlternateEditPreview',
3443                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3444                         ) {
3445                                 wfProfileOut( __METHOD__ );
3446                                 return $previewHTML;
3447                         }
3448
3449                         # provide a anchor link to the editform
3450                         $continueEditing = '<span class="mw-continue-editing">' .
3451                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3452                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3453                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3454                                 if ( $this->mTokenOkExceptSuffix ) {
3455                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3456                                 } else {
3457                                         $note = wfMessage( 'session_fail_preview' )->plain();
3458                                 }
3459                         } elseif ( $this->incompleteForm ) {
3460                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3461                         } else {
3462                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3463                         }
3464
3465                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3466                         $parserOptions->setEditSection( false );
3467                         $parserOptions->setIsPreview( true );
3468                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3469
3470                         # don't parse non-wikitext pages, show message about preview
3471                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3472                                 if ( $this->mTitle->isCssJsSubpage() ) {
3473                                         $level = 'user';
3474                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3475                                         $level = 'site';
3476                                 } else {
3477                                         $level = false;
3478                                 }
3479
3480                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3481                                         $format = 'css';
3482                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3483                                                 $format = false;
3484                                         }
3485                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3486                                         $format = 'js';
3487                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3488                                                 $format = false;
3489                                         }
3490                                 } else {
3491                                         $format = false;
3492                                 }
3493
3494                                 # Used messages to make sure grep find them:
3495                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3496                                 if ( $level && $format ) {
3497                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3498                                                 wfMessage( "{$level}{$format}preview" )->text() .
3499                                                 ' ' . $continueEditing . "</div>";
3500                                 }
3501                         }
3502
3503                         # If we're adding a comment, we need to show the
3504                         # summary as the headline
3505                         if ( $this->section === "new" && $this->summary !== "" ) {
3506                                 $content = $content->addSectionHeader( $this->summary );
3507                         }
3508
3509                         $hook_args = array( $this, &$content );
3510                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3511                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3512
3513                         $parserOptions->enableLimitReport();
3514
3515                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3516                         # But it's now deprecated, so never mind
3517
3518                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3519                         $parserOutput = $content->getParserOutput(
3520                                 $this->getArticle()->getTitle(),
3521                                 null,
3522                                 $parserOptions
3523                         );
3524
3525                         $previewHTML = $parserOutput->getText();
3526                         $this->mParserOutput = $parserOutput;
3527                         $wgOut->addParserOutputMetadata( $parserOutput );
3528
3529                         if ( count( $parserOutput->getWarnings() ) ) {
3530                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3531                         }
3532                 } catch ( MWContentSerializationException $ex ) {
3533                         $m = wfMessage(
3534                                 'content-failed-to-parse',
3535                                 $this->contentModel,
3536                                 $this->contentFormat,
3537                                 $ex->getMessage()
3538                         );
3539                         $note .= "\n\n" . $m->parse();
3540                         $previewHTML = '';
3541                 }
3542
3543                 if ( $this->isConflict ) {
3544                         $conflict = '<h2 id="mw-previewconflict">'
3545                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3546                 } else {
3547                         $conflict = '<hr />';
3548                 }
3549
3550                 $previewhead = "<div class='previewnote'>\n" .
3551                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3552                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3553
3554                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3555                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3556                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3557                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3558
3559                 wfProfileOut( __METHOD__ );
3560                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3561         }
3562
3563         /**
3564          * @return array
3565          */
3566         function getTemplates() {
3567                 if ( $this->preview || $this->section != '' ) {
3568                         $templates = array();
3569                         if ( !isset( $this->mParserOutput ) ) {
3570                                 return $templates;
3571                         }
3572                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3573                                 foreach ( array_keys( $template ) as $dbk ) {
3574                                         $templates[] = Title::makeTitle( $ns, $dbk );
3575                                 }
3576                         }
3577                         return $templates;
3578                 } else {
3579                         return $this->mTitle->getTemplateLinksFrom();
3580                 }
3581         }
3582
3583         /**
3584          * Shows a bulletin board style toolbar for common editing functions.
3585          * It can be disabled in the user preferences.
3586          *
3587          * @return string
3588          */
3589         static function getEditToolbar() {
3590                 global $wgContLang, $wgOut;
3591                 global $wgEnableUploads, $wgForeignFileRepos;
3592
3593                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3594
3595                 /**
3596                  * $toolarray is an array of arrays each of which includes the
3597                  * opening tag, the closing tag, optionally a sample text that is
3598                  * inserted between the two when no selection is highlighted
3599                  * and.  The tip text is shown when the user moves the mouse
3600                  * over the button.
3601                  *
3602                  * Images are defined in ResourceLoaderEditToolbarModule.
3603                  */
3604                 $toolarray = array(
3605                         array(
3606                                 'id'     => 'mw-editbutton-bold',
3607                                 'open'   => '\'\'\'',
3608                                 'close'  => '\'\'\'',
3609                                 'sample' => wfMessage( 'bold_sample' )->text(),
3610                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3611                         ),
3612                         array(
3613                                 'id'     => 'mw-editbutton-italic',
3614                                 'open'   => '\'\'',
3615                                 'close'  => '\'\'',
3616                                 'sample' => wfMessage( 'italic_sample' )->text(),
3617                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3618                         ),
3619                         array(
3620                                 'id'     => 'mw-editbutton-link',
3621                                 'open'   => '[[',
3622                                 'close'  => ']]',
3623                                 'sample' => wfMessage( 'link_sample' )->text(),
3624                                 'tip'    => wfMessage( 'link_tip' )->text(),
3625                         ),
3626                         array(
3627                                 'id'     => 'mw-editbutton-extlink',
3628                                 'open'   => '[',
3629                                 'close'  => ']',
3630                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3631                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3632                         ),
3633                         array(
3634                                 'id'     => 'mw-editbutton-headline',
3635                                 'open'   => "\n== ",
3636                                 'close'  => " ==\n",
3637                                 'sample' => wfMessage( 'headline_sample' )->text(),
3638                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3639                         ),
3640                         $imagesAvailable ? array(
3641                                 'id'     => 'mw-editbutton-image',
3642                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3643                                 'close'  => ']]',
3644                                 'sample' => wfMessage( 'image_sample' )->text(),
3645                                 'tip'    => wfMessage( 'image_tip' )->text(),
3646                         ) : false,
3647                         $imagesAvailable ? array(
3648                                 'id'     => 'mw-editbutton-media',
3649                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3650                                 'close'  => ']]',
3651                                 'sample' => wfMessage( 'media_sample' )->text(),
3652                                 'tip'    => wfMessage( 'media_tip' )->text(),
3653                         ) : false,
3654                         array(
3655                                 'id'     => 'mw-editbutton-nowiki',
3656                                 'open'   => "<nowiki>",
3657                                 'close'  => "</nowiki>",
3658                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3659                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3660                         ),
3661                         array(
3662                                 'id'     => 'mw-editbutton-signature',
3663                                 'open'   => '--~~~~',
3664                                 'close'  => '',
3665                                 'sample' => '',
3666                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3667                         ),
3668                         array(
3669                                 'id'     => 'mw-editbutton-hr',
3670                                 'open'   => "\n----\n",
3671                                 'close'  => '',
3672                                 'sample' => '',
3673                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3674                         )
3675                 );
3676
3677                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3678                 foreach ( $toolarray as $tool ) {
3679                         if ( !$tool ) {
3680                                 continue;
3681                         }
3682
3683                         $params = array(
3684                                 // Images are defined in ResourceLoaderEditToolbarModule
3685                                 false,
3686                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3687                                 // Older browsers show a "speedtip" type message only for ALT.
3688                                 // Ideally these should be different, realistically they
3689                                 // probably don't need to be.
3690                                 $tool['tip'],
3691                                 $tool['open'],
3692                                 $tool['close'],
3693                                 $tool['sample'],
3694                                 $tool['id'],
3695                         );
3696
3697                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3698                 }
3699
3700                 $script .= '});';
3701                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3702
3703                 $toolbar = '<div id="toolbar"></div>';
3704
3705                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3706
3707                 return $toolbar;
3708         }
3709
3710         /**
3711          * Returns an array of html code of the following checkboxes:
3712          * minor and watch
3713          *
3714          * @param int $tabindex Current tabindex
3715          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3716          *                 status of the checkbox
3717          *
3718          * @return array
3719          */
3720         public function getCheckboxes( &$tabindex, $checked ) {
3721                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3722
3723                 $checkboxes = array();
3724
3725                 // don't show the minor edit checkbox if it's a new page or section
3726                 if ( !$this->isNew ) {
3727                         $checkboxes['minor'] = '';
3728                         $minorLabel = wfMessage( 'minoredit' )->parse();
3729                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3730                                 $attribs = array(
3731                                         'tabindex' => ++$tabindex,
3732                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3733                                         'id' => 'wpMinoredit',
3734                                 );
3735                                 $minorEditHtml =
3736                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3737                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3738                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3739                                         ">{$minorLabel}</label>";
3740
3741                                 if ( $wgUseMediaWikiUIEverywhere ) {
3742                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3743                                                 $minorEditHtml .
3744                                         Html::closeElement( 'div' );
3745                                 } else {
3746                                         $checkboxes['minor'] = $minorEditHtml;
3747                                 }
3748                         }
3749                 }
3750
3751                 $watchLabel = wfMessage( 'watchthis' )->parse();
3752                 $checkboxes['watch'] = '';
3753                 if ( $wgUser->isLoggedIn() ) {
3754                         $attribs = array(
3755                                 'tabindex' => ++$tabindex,
3756                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3757                                 'id' => 'wpWatchthis',
3758                         );
3759                         $watchThisHtml =
3760                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3761                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3762                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3763                                 ">{$watchLabel}</label>";
3764                         if ( $wgUseMediaWikiUIEverywhere ) {
3765                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3766                                         $watchThisHtml .
3767                                         Html::closeElement( 'div' );
3768                         } else {
3769                                 $checkboxes['watch'] = $watchThisHtml;
3770                         }
3771                 }
3772                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3773                 return $checkboxes;
3774         }
3775
3776         /**
3777          * Returns an array of html code of the following buttons:
3778          * save, diff, preview and live
3779          *
3780          * @param int $tabindex Current tabindex
3781          *
3782          * @return array
3783          */
3784         public function getEditButtons( &$tabindex ) {
3785                 $buttons = array();
3786
3787                 $attribs = array(
3788                         'id' => 'wpSave',
3789                         'name' => 'wpSave',
3790                         'tabindex' => ++$tabindex,
3791                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3792                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3793                         $attribs, array( 'mw-ui-constructive' ) );
3794
3795                 ++$tabindex; // use the same for preview and live preview
3796                 $attribs = array(
3797                         'id' => 'wpPreview',
3798                         'name' => 'wpPreview',
3799                         'tabindex' => $tabindex,
3800                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3801                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3802                         $attribs );
3803                 $buttons['live'] = '';
3804
3805                 $attribs = array(
3806                         'id' => 'wpDiff',
3807                         'name' => 'wpDiff',
3808                         'tabindex' => ++$tabindex,
3809                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3810                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3811                         $attribs );
3812
3813                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3814                 return $buttons;
3815         }
3816
3817         /**
3818          * Output preview text only. This can be sucked into the edit page
3819          * via JavaScript, and saves the server time rendering the skin as
3820          * well as theoretically being more robust on the client (doesn't
3821          * disturb the edit box's undo history, won't eat your text on
3822          * failure, etc).
3823          *
3824          * @todo This doesn't include category or interlanguage links.
3825          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3826          *       or something...</s>" that might also require more skin
3827          *       initialization, so check whether that's a problem.
3828          */
3829         function livePreview() {
3830                 global $wgOut;
3831                 $wgOut->disable();
3832                 header( 'Content-type: text/xml; charset=utf-8' );
3833                 header( 'Cache-control: no-cache' );
3834
3835                 $previewText = $this->getPreviewText();
3836                 #$categories = $skin->getCategoryLinks();
3837
3838                 $s =
3839                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3840                         Xml::tags( 'livepreview', null,
3841                                 Xml::element( 'preview', null, $previewText )
3842                                 #.      Xml::element( 'category', null, $categories )
3843                         );
3844                 echo $s;
3845         }
3846
3847         /**
3848          * Creates a basic error page which informs the user that
3849          * they have attempted to edit a nonexistent section.
3850          */
3851         function noSuchSectionPage() {
3852                 global $wgOut;
3853
3854                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3855
3856                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3857                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3858                 $wgOut->addHTML( $res );
3859
3860                 $wgOut->returnToMain( false, $this->mTitle );
3861         }
3862
3863         /**
3864          * Show "your edit contains spam" page with your diff and text
3865          *
3866          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3867          */
3868         public function spamPageWithContent( $match = false ) {
3869                 global $wgOut, $wgLang;
3870                 $this->textbox2 = $this->textbox1;
3871
3872                 if ( is_array( $match ) ) {
3873                         $match = $wgLang->listToText( $match );
3874                 }
3875                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3876
3877                 $wgOut->addHTML( '<div id="spamprotected">' );
3878                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3879                 if ( $match ) {
3880                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3881                 }
3882                 $wgOut->addHTML( '</div>' );
3883
3884                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3885                 $this->showDiff();
3886
3887                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3888                 $this->showTextbox2();
3889
3890                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3891         }
3892
3893         /**
3894          * Check if the browser is on a blacklist of user-agents known to
3895          * mangle UTF-8 data on form submission. Returns true if Unicode
3896          * should make it through, false if it's known to be a problem.
3897          * @return bool
3898          */
3899         private function checkUnicodeCompliantBrowser() {
3900                 global $wgBrowserBlackList, $wgRequest;
3901
3902                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3903                 if ( $currentbrowser === false ) {
3904                         // No User-Agent header sent? Trust it by default...
3905                         return true;
3906                 }
3907
3908                 foreach ( $wgBrowserBlackList as $browser ) {
3909                         if ( preg_match( $browser, $currentbrowser ) ) {
3910                                 return false;
3911                         }
3912                 }
3913                 return true;
3914         }
3915
3916         /**
3917          * Filter an input field through a Unicode de-armoring process if it
3918          * came from an old browser with known broken Unicode editing issues.
3919          *
3920          * @param WebRequest $request
3921          * @param string $field
3922          * @return string
3923          */
3924         protected function safeUnicodeInput( $request, $field ) {
3925                 $text = rtrim( $request->getText( $field ) );
3926                 return $request->getBool( 'safemode' )
3927                         ? $this->unmakeSafe( $text )
3928                         : $text;
3929         }
3930
3931         /**
3932          * Filter an output field through a Unicode armoring process if it is
3933          * going to an old browser with known broken Unicode editing issues.
3934          *
3935          * @param string $text
3936          * @return string
3937          */
3938         protected function safeUnicodeOutput( $text ) {
3939                 global $wgContLang;
3940                 $codedText = $wgContLang->recodeForEdit( $text );
3941                 return $this->checkUnicodeCompliantBrowser()
3942                         ? $codedText
3943                         : $this->makeSafe( $codedText );
3944         }
3945
3946         /**
3947          * A number of web browsers are known to corrupt non-ASCII characters
3948          * in a UTF-8 text editing environment. To protect against this,
3949          * detected browsers will be served an armored version of the text,
3950          * with non-ASCII chars converted to numeric HTML character references.
3951          *
3952          * Preexisting such character references will have a 0 added to them
3953          * to ensure that round-trips do not alter the original data.
3954          *
3955          * @param string $invalue
3956          * @return string
3957          */
3958         private function makeSafe( $invalue ) {
3959                 // Armor existing references for reversibility.
3960                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3961
3962                 $bytesleft = 0;
3963                 $result = "";
3964                 $working = 0;
3965                 $valueLength = strlen( $invalue );
3966                 for ( $i = 0; $i < $valueLength; $i++ ) {
3967                         $bytevalue = ord( $invalue[$i] );
3968                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3969                                 $result .= chr( $bytevalue );
3970                                 $bytesleft = 0;
3971                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3972                                 $working = $working << 6;
3973                                 $working += ( $bytevalue & 0x3F );
3974                                 $bytesleft--;
3975                                 if ( $bytesleft <= 0 ) {
3976                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3977                                 }
3978                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3979                                 $working = $bytevalue & 0x1F;
3980                                 $bytesleft = 1;
3981                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3982                                 $working = $bytevalue & 0x0F;
3983                                 $bytesleft = 2;
3984                         } else { // 1111 0xxx
3985                                 $working = $bytevalue & 0x07;
3986                                 $bytesleft = 3;
3987                         }
3988                 }
3989                 return $result;
3990         }
3991
3992         /**
3993          * Reverse the previously applied transliteration of non-ASCII characters
3994          * back to UTF-8. Used to protect data from corruption by broken web browsers
3995          * as listed in $wgBrowserBlackList.
3996          *
3997          * @param string $invalue
3998          * @return string
3999          */
4000         private function unmakeSafe( $invalue ) {
4001                 $result = "";
4002                 $valueLength = strlen( $invalue );
4003                 for ( $i = 0; $i < $valueLength; $i++ ) {
4004                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4005                                 $i += 3;
4006                                 $hexstring = "";
4007                                 do {
4008                                         $hexstring .= $invalue[$i];
4009                                         $i++;
4010                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4011
4012                                 // Do some sanity checks. These aren't needed for reversibility,
4013                                 // but should help keep the breakage down if the editor
4014                                 // breaks one of the entities whilst editing.
4015                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4016                                         $codepoint = hexdec( $hexstring );
4017                                         $result .= codepointToUtf8( $codepoint );
4018                                 } else {
4019                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4020                                 }
4021                         } else {
4022                                 $result .= substr( $invalue, $i, 1 );
4023                         }
4024                 }
4025                 // reverse the transform that we made for reversibility reasons.
4026                 return strtr( $result, array( "&#x0" => "&#x" ) );
4027         }
4028 }