includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: user tried to modify the content model, but is not allowed to do that
 149          * ( User::isAllowed('editcontentmodel') == false )
 150          */
 151         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 152
 153         /**
 154          * Status: user tried to create self-redirect (redirect to the same article) and
 155          * wpIgnoreSelfRedirect == false
 156          */
 157         const AS_SELF_REDIRECT = 236;
 158
 159         /**
 160          * Status: can't parse content
 161          */
 162         const AS_PARSE_ERROR = 240;
 163
 164         /**
 165          * HTML id and name for the beginning of the edit form.
 166          */
 167         const EDITFORM_ID = 'editform';
 168
 169         /**
 170          * Prefix of key for cookie used to pass post-edit state.
 171          * The revision id edited is added after this
 172          */
 173         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 174
 175         /**
 176          * Duration of PostEdit cookie, in seconds.
 177          * The cookie will be removed instantly if the JavaScript runs.
 178          *
 179          * Otherwise, though, we don't want the cookies to accumulate.
 180          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 181          * limit of only 20 cookies per domain. This still applies at least to some
 182          * versions of IE without full updates:
 183          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 184          *
 185          * A value of 20 minutes should be enough to take into account slow loads and minor
 186          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 187          */
 188         const POST_EDIT_COOKIE_DURATION = 1200;
 189
 190         /** @var Article */
 191         public $mArticle;
 192
 193         /** @var Title */
 194         public $mTitle;
 195
 196         /** @var null|Title */
 197         private $mContextTitle = null;
 198
 199         /** @var string */
 200         public $action = 'submit';
 201
 202         /** @var bool */
 203         public $isConflict = false;
 204
 205         /** @var bool */
 206         public $isCssJsSubpage = false;
 207
 208         /** @var bool */
 209         public $isCssSubpage = false;
 210
 211         /** @var bool */
 212         public $isJsSubpage = false;
 213
 214         /** @var bool */
 215         public $isWrongCaseCssJsPage = false;
 216
 217         /** @var bool New page or new section */
 218         public $isNew = false;
 219
 220         /** @var bool */
 221         public $deletedSinceEdit;
 222
 223         /** @var string */
 224         public $formtype;
 225
 226         /** @var bool */
 227         public $firsttime;
 228
 229         /** @var bool|stdClass */
 230         public $lastDelete;
 231
 232         /** @var bool */
 233         public $mTokenOk = false;
 234
 235         /** @var bool */
 236         public $mTokenOkExceptSuffix = false;
 237
 238         /** @var bool */
 239         public $mTriedSave = false;
 240
 241         /** @var bool */
 242         public $incompleteForm = false;
 243
 244         /** @var bool */
 245         public $tooBig = false;
 246
 247         /** @var bool */
 248         public $kblength = false;
 249
 250         /** @var bool */
 251         public $missingComment = false;
 252
 253         /** @var bool */
 254         public $missingSummary = false;
 255
 256         /** @var bool */
 257         public $allowBlankSummary = false;
 258
 259         /** @var bool */
 260         protected $blankArticle = false;
 261
 262         /** @var bool */
 263         protected $allowBlankArticle = false;
 264
 265         /** @var bool */
 266         protected $selfRedirect = false;
 267
 268         /** @var bool */
 269         protected $allowSelfRedirect = false;
 270
 271         /** @var string */
 272         public $autoSumm = '';
 273
 274         /** @var string */
 275         public $hookError = '';
 276
 277         /** @var ParserOutput */
 278         public $mParserOutput;
 279
 280         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 281         public $hasPresetSummary = false;
 282
 283         /** @var bool */
 284         public $mBaseRevision = false;
 285
 286         /** @var bool */
 287         public $mShowSummaryField = true;
 288
 289         # Form values
 290
 291         /** @var bool */
 292         public $save = false;
 293
 294         /** @var bool */
 295         public $preview = false;
 296
 297         /** @var bool */
 298         public $diff = false;
 299
 300         /** @var bool */
 301         public $minoredit = false;
 302
 303         /** @var bool */
 304         public $watchthis = false;
 305
 306         /** @var bool */
 307         public $recreate = false;
 308
 309         /** @var string */
 310         public $textbox1 = '';
 311
 312         /** @var string */
 313         public $textbox2 = '';
 314
 315         /** @var string */
 316         public $summary = '';
 317
 318         /** @var bool */
 319         public $nosummary = false;
 320
 321         /** @var string */
 322         public $edittime = '';
 323
 324         /** @var string */
 325         public $section = '';
 326
 327         /** @var string */
 328         public $sectiontitle = '';
 329
 330         /** @var string */
 331         public $starttime = '';
 332
 333         /** @var int */
 334         public $oldid = 0;
 335
 336         /** @var int */
 337         public $parentRevId = 0;
 338
 339         /** @var string */
 340         public $editintro = '';
 341
 342         /** @var null */
 343         public $scrolltop = null;
 344
 345         /** @var bool */
 346         public $bot = true;
 347
 348         /** @var null|string */
 349         public $contentModel = null;
 350
 351         /** @var null|string */
 352         public $contentFormat = null;
 353
 354         # Placeholders for text injection by hooks (must be HTML)
 355         # extensions should take care to _append_ to the present value
 356
 357         /** @var string Before even the preview */
 358         public $editFormPageTop = '';
 359         public $editFormTextTop = '';
 360         public $editFormTextBeforeContent = '';
 361         public $editFormTextAfterWarn = '';
 362         public $editFormTextAfterTools = '';
 363         public $editFormTextBottom = '';
 364         public $editFormTextAfterContent = '';
 365         public $previewTextAfterContent = '';
 366         public $mPreloadContent = null;
 367
 368         /* $didSave should be set to true whenever an article was successfully altered. */
 369         public $didSave = false;
 370         public $undidRev = 0;
 371
 372         public $suppressIntro = false;
 373
 374         /** @var bool Set to true to allow editing of non-text content types. */
 375         public $allowNonTextContent = false;
 376
 377         /** @var bool */
 378         protected $edit;
 379
 380         /**
 381          * @param Article $article
 382          */
 383         public function __construct( Article $article ) {
 384                 $this->mArticle = $article;
 385                 $this->mTitle = $article->getTitle();
 386
 387                 $this->contentModel = $this->mTitle->getContentModel();
 388
 389                 $handler = ContentHandler::getForModelID( $this->contentModel );
 390                 $this->contentFormat = $handler->getDefaultFormat();
 391         }
 392
 393         /**
 394          * @return Article
 395          */
 396         public function getArticle() {
 397                 return $this->mArticle;
 398         }
 399
 400         /**
 401          * @since 1.19
 402          * @return Title
 403          */
 404         public function getTitle() {
 405                 return $this->mTitle;
 406         }
 407
 408         /**
 409          * Set the context Title object
 410          *
 411          * @param Title|null $title Title object or null
 412          */
 413         public function setContextTitle( $title ) {
 414                 $this->mContextTitle = $title;
 415         }
 416
 417         /**
 418          * Get the context title object.
 419          * If not set, $wgTitle will be returned. This behavior might change in
 420          * the future to return $this->mTitle instead.
 421          *
 422          * @return Title
 423          */
 424         public function getContextTitle() {
 425                 if ( is_null( $this->mContextTitle ) ) {
 426                         global $wgTitle;
 427                         return $wgTitle;
 428                 } else {
 429                         return $this->mContextTitle;
 430                 }
 431         }
 432
 433         /**
 434          * Returns if the given content model is editable.
 435          *
 436          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 437          * @return bool
 438          * @throws MWException If $modelId has no known handler
 439          */
 440         public function isSupportedContentModel( $modelId ) {
 441                 return $this->allowNonTextContent ||
 442                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 443         }
 444
 445         function submit() {
 446                 $this->edit();
 447         }
 448
 449         /**
 450          * This is the function that gets called for "action=edit". It
 451          * sets up various member variables, then passes execution to
 452          * another function, usually showEditForm()
 453          *
 454          * The edit form is self-submitting, so that when things like
 455          * preview and edit conflicts occur, we get the same form back
 456          * with the extra stuff added.  Only when the final submission
 457          * is made and all is well do we actually save and redirect to
 458          * the newly-edited page.
 459          */
 460         function edit() {
 461                 global $wgOut, $wgRequest, $wgUser;
 462                 // Allow extensions to modify/prevent this form or submission
 463                 if ( !Hooks::run( 'AlternateEdit', array( $this ) ) ) {
 464                         return;
 465                 }
 466
 467                 wfDebug( __METHOD__ . ": enter\n" );
 468
 469                 // If they used redlink=1 and the page exists, redirect to the main article
 470                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 471                         $wgOut->redirect( $this->mTitle->getFullURL() );
 472                         return;
 473                 }
 474
 475                 $this->importFormData( $wgRequest );
 476                 $this->firsttime = false;
 477
 478                 if ( wfReadOnly() && $this->save ) {
 479                         // Force preview
 480                         $this->save = false;
 481                         $this->preview = true;
 482                 }
 483
 484                 if ( $this->save ) {
 485                         $this->formtype = 'save';
 486                 } elseif ( $this->preview ) {
 487                         $this->formtype = 'preview';
 488                 } elseif ( $this->diff ) {
 489                         $this->formtype = 'diff';
 490                 } else { # First time through
 491                         $this->firsttime = true;
 492                         if ( $this->previewOnOpen() ) {
 493                                 $this->formtype = 'preview';
 494                         } else {
 495                                 $this->formtype = 'initial';
 496                         }
 497                 }
 498
 499                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 500                 if ( $permErrors ) {
 501                         wfDebug( __METHOD__ . ": User can't edit\n" );
 502                         // Auto-block user's IP if the account was "hard" blocked
 503                         $wgUser->spreadAnyEditBlock();
 504
 505                         $this->displayPermissionsError( $permErrors );
 506
 507                         return;
 508                 }
 509
 510                 $this->isConflict = false;
 511                 // css / js subpages of user pages get a special treatment
 512                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 513                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 514                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 515                 // @todo FIXME: Silly assignment.
 516                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 517
 518                 # Show applicable editing introductions
 519                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 520                         $this->showIntro();
 521                 }
 522
 523                 # Attempt submission here.  This will check for edit conflicts,
 524                 # and redundantly check for locked database, blocked IPs, etc.
 525                 # that edit() already checked just in case someone tries to sneak
 526                 # in the back door with a hand-edited submission URL.
 527
 528                 if ( 'save' == $this->formtype ) {
 529                         $resultDetails = null;
 530                         $status = $this->attemptSave( $resultDetails );
 531                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 532                                 return;
 533                         }
 534                 }
 535
 536                 # First time through: get contents, set time for conflict
 537                 # checking, etc.
 538                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 539                         if ( $this->initialiseForm() === false ) {
 540                                 $this->noSuchSectionPage();
 541                                 return;
 542                         }
 543
 544                         if ( !$this->mTitle->getArticleID() ) {
 545                                 Hooks::run( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 546                         } else {
 547                                 Hooks::run( 'EditFormInitialText', array( $this ) );
 548                         }
 549
 550                 }
 551
 552                 $this->showEditForm();
 553         }
 554
 555         /**
 556          * @param string $rigor Same format as Title::getUserPermissionErrors()
 557          * @return array
 558          */
 559         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 560                 global $wgUser;
 561
 562                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 563                 # Can this title be created?
 564                 if ( !$this->mTitle->exists() ) {
 565                         $permErrors = array_merge(
 566                                 $permErrors,
 567                                 wfArrayDiff2(
 568                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 569                                         $permErrors
 570                                 )
 571                         );
 572                 }
 573                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 574                 $remove = array();
 575                 foreach ( $permErrors as $error ) {
 576                         if ( ( $this->preview || $this->diff )
 577                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 578                         ) {
 579                                 $remove[] = $error;
 580                         }
 581                 }
 582                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 583
 584                 return $permErrors;
 585         }
 586
 587         /**
 588          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 589          * but with the following differences:
 590          * - If redlink=1, the user will be redirected to the page
 591          * - If there is content to display or the error occurs while either saving,
 592          *   previewing or showing the difference, it will be a
 593          *   "View source for ..." page displaying the source code after the error message.
 594          *
 595          * @since 1.19
 596          * @param array $permErrors Array of permissions errors, as returned by
 597          *    Title::getUserPermissionsErrors().
 598          * @throws PermissionsError
 599          */
 600         protected function displayPermissionsError( array $permErrors ) {
 601                 global $wgRequest, $wgOut;
 602
 603                 if ( $wgRequest->getBool( 'redlink' ) ) {
 604                         // The edit page was reached via a red link.
 605                         // Redirect to the article page and let them click the edit tab if
 606                         // they really want a permission error.
 607                         $wgOut->redirect( $this->mTitle->getFullURL() );
 608                         return;
 609                 }
 610
 611                 $content = $this->getContentObject();
 612
 613                 # Use the normal message if there's nothing to display
 614                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 615                         $action = $this->mTitle->exists() ? 'edit' :
 616                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 617                         throw new PermissionsError( $action, $permErrors );
 618                 }
 619
 620                 Hooks::run( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 621
 622                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 623                 $wgOut->setPageTitle( wfMessage(
 624                         'viewsource-title',
 625                         $this->getContextTitle()->getPrefixedText()
 626                 ) );
 627                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 628                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 629                 $wgOut->addHTML( "<hr />\n" );
 630
 631                 # If the user made changes, preserve them when showing the markup
 632                 # (This happens when a user is blocked during edit, for instance)
 633                 if ( !$this->firsttime ) {
 634                         $text = $this->textbox1;
 635                         $wgOut->addWikiMsg( 'viewyourtext' );
 636                 } else {
 637                         $text = $this->toEditText( $content );
 638                         $wgOut->addWikiMsg( 'viewsourcetext' );
 639                 }
 640
 641                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 642
 643                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 644                         Linker::formatTemplates( $this->getTemplates() ) ) );
 645
 646                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 647
 648                 if ( $this->mTitle->exists() ) {
 649                         $wgOut->returnToMain( null, $this->mTitle );
 650                 }
 651         }
 652
 653         /**
 654          * Should we show a preview when the edit form is first shown?
 655          *
 656          * @return bool
 657          */
 658         protected function previewOnOpen() {
 659                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 660                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 661                         // Explicit override from request
 662                         return true;
 663                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 664                         // Explicit override from request
 665                         return false;
 666                 } elseif ( $this->section == 'new' ) {
 667                         // Nothing *to* preview for new sections
 668                         return false;
 669                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 670                         && $wgUser->getOption( 'previewonfirst' )
 671                 ) {
 672                         // Standard preference behavior
 673                         return true;
 674                 } elseif ( !$this->mTitle->exists()
 675                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 676                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 677                 ) {
 678                         // Categories are special
 679                         return true;
 680                 } else {
 681                         return false;
 682                 }
 683         }
 684
 685         /**
 686          * Checks whether the user entered a skin name in uppercase,
 687          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 688          *
 689          * @return bool
 690          */
 691         protected function isWrongCaseCssJsPage() {
 692                 if ( $this->mTitle->isCssJsSubpage() ) {
 693                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 694                         $skins = array_merge(
 695                                 array_keys( Skin::getSkinNames() ),
 696                                 array( 'common' )
 697                         );
 698                         return !in_array( $name, $skins )
 699                                 && in_array( strtolower( $name ), $skins );
 700                 } else {
 701                         return false;
 702                 }
 703         }
 704
 705         /**
 706          * Returns whether section editing is supported for the current page.
 707          * Subclasses may override this to replace the default behavior, which is
 708          * to check ContentHandler::supportsSections.
 709          *
 710          * @return bool True if this edit page supports sections, false otherwise.
 711          */
 712         protected function isSectionEditSupported() {
 713                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 714                 return $contentHandler->supportsSections();
 715         }
 716
 717         /**
 718          * This function collects the form data and uses it to populate various member variables.
 719          * @param WebRequest $request
 720          * @throws ErrorPageError
 721          */
 722         function importFormData( &$request ) {
 723                 global $wgContLang, $wgUser;
 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                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 730                 }
 731
 732                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 733
 734                 if ( $request->wasPosted() ) {
 735                         # These fields need to be checked for encoding.
 736                         # Also remove trailing whitespace, but don't remove _initial_
 737                         # whitespace from the text boxes. This may be significant formatting.
 738                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 739                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 740                                 // Skip this if wpTextbox2 has input, it indicates that we came
 741                                 // from a conflict page with raw page text, not a custom form
 742                                 // modified by subclasses
 743                                 $textbox1 = $this->importContentFormData( $request );
 744                                 if ( $textbox1 !== null ) {
 745                                         $this->textbox1 = $textbox1;
 746                                 }
 747                         }
 748
 749                         # Truncate for whole multibyte characters
 750                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 751
 752                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 753                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 754                         # section titles.
 755                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 756
 757                         # Treat sectiontitle the same way as summary.
 758                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 759                         # currently doing double duty as both edit summary and section title. Right now this
 760                         # is just to allow API edits to work around this limitation, but this should be
 761                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 762                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 763                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 764
 765                         $this->edittime = $request->getVal( 'wpEdittime' );
 766                         $this->starttime = $request->getVal( 'wpStarttime' );
 767
 768                         $undidRev = $request->getInt( 'wpUndidRevision' );
 769                         if ( $undidRev ) {
 770                                 $this->undidRev = $undidRev;
 771                         }
 772
 773                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 774
 775                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 776                                 // wpTextbox1 field is missing, possibly due to being "too big"
 777                                 // according to some filter rules such as Suhosin's setting for
 778                                 // suhosin.request.max_value_length (d'oh)
 779                                 $this->incompleteForm = true;
 780                         } else {
 781                                 // If we receive the last parameter of the request, we can fairly
 782                                 // claim the POST request has not been truncated.
 783
 784                                 // TODO: softened the check for cutover.  Once we determine
 785                                 // that it is safe, we should complete the transition by
 786                                 // removing the "edittime" clause.
 787                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 788                                         && is_null( $this->edittime ) );
 789                         }
 790                         if ( $this->incompleteForm ) {
 791                                 # If the form is incomplete, force to preview.
 792                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 793                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 794                                 $this->preview = true;
 795                         } else {
 796                                 $this->preview = $request->getCheck( 'wpPreview' );
 797                                 $this->diff = $request->getCheck( 'wpDiff' );
 798
 799                                 // Remember whether a save was requested, so we can indicate
 800                                 // if we forced preview due to session failure.
 801                                 $this->mTriedSave = !$this->preview;
 802
 803                                 if ( $this->tokenOk( $request ) ) {
 804                                         # Some browsers will not report any submit button
 805                                         # if the user hits enter in the comment box.
 806                                         # The unmarked state will be assumed to be a save,
 807                                         # if the form seems otherwise complete.
 808                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 809                                 } elseif ( $this->diff ) {
 810                                         # Failed token check, but only requested "Show Changes".
 811                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 812                                 } else {
 813                                         # Page might be a hack attempt posted from
 814                                         # an external site. Preview instead of saving.
 815                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 816                                         $this->preview = true;
 817                                 }
 818                         }
 819                         $this->save = !$this->preview && !$this->diff;
 820                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 821                                 $this->edittime = null;
 822                         }
 823
 824                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 825                                 $this->starttime = null;
 826                         }
 827
 828                         $this->recreate = $request->getCheck( 'wpRecreate' );
 829
 830                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 831                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 832
 833                         # Don't force edit summaries when a user is editing their own user or talk page
 834                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 835                                 && $this->mTitle->getText() == $wgUser->getName()
 836                         ) {
 837                                 $this->allowBlankSummary = true;
 838                         } else {
 839                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 840                                         || !$wgUser->getOption( 'forceeditsummary' );
 841                         }
 842
 843                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 844
 845                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 846                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 847                 } else {
 848                         # Not a posted form? Start with nothing.
 849                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 850                         $this->textbox1 = '';
 851                         $this->summary = '';
 852                         $this->sectiontitle = '';
 853                         $this->edittime = '';
 854                         $this->starttime = wfTimestampNow();
 855                         $this->edit = false;
 856                         $this->preview = false;
 857                         $this->save = false;
 858                         $this->diff = false;
 859                         $this->minoredit = false;
 860                         // Watch may be overridden by request parameters
 861                         $this->watchthis = $request->getBool( 'watchthis', false );
 862                         $this->recreate = false;
 863
 864                         // When creating a new section, we can preload a section title by passing it as the
 865                         // preloadtitle parameter in the URL (Bug 13100)
 866                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 867                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 868                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 869                                 $this->summary = $request->getVal( 'preloadtitle' );
 870                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 871                                 $this->summary = $request->getText( 'summary' );
 872                                 if ( $this->summary !== '' ) {
 873                                         $this->hasPresetSummary = true;
 874                                 }
 875                         }
 876
 877                         if ( $request->getVal( 'minor' ) ) {
 878                                 $this->minoredit = true;
 879                         }
 880                 }
 881
 882                 $this->oldid = $request->getInt( 'oldid' );
 883                 $this->parentRevId = $request->getInt( 'parentRevId' );
 884
 885                 $this->bot = $request->getBool( 'bot', true );
 886                 $this->nosummary = $request->getBool( 'nosummary' );
 887
 888                 // May be overridden by revision.
 889                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 890                 // May be overridden by revision.
 891                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 892
 893                 if ( !ContentHandler::getForModelID( $this->contentModel )
 894                         ->isSupportedFormat( $this->contentFormat )
 895                 ) {
 896                         throw new ErrorPageError(
 897                                 'editpage-notsupportedcontentformat-title',
 898                                 'editpage-notsupportedcontentformat-text',
 899                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 900                         );
 901                 }
 902
 903                 /**
 904                  * @todo Check if the desired model is allowed in this namespace, and if
 905                  *   a transition from the page's current model to the new model is
 906                  *   allowed.
 907                  */
 908
 909                 $this->editintro = $request->getText( 'editintro',
 910                         // Custom edit intro for new sections
 911                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 912
 913                 // Allow extensions to modify form data
 914                 Hooks::run( 'EditPage::importFormData', array( $this, $request ) );
 915
 916         }
 917
 918         /**
 919          * Subpage overridable method for extracting the page content data from the
 920          * posted form to be placed in $this->textbox1, if using customized input
 921          * this method should be overridden and return the page text that will be used
 922          * for saving, preview parsing and so on...
 923          *
 924          * @param WebRequest $request
 925          */
 926         protected function importContentFormData( &$request ) {
 927                 return; // Don't do anything, EditPage already extracted wpTextbox1
 928         }
 929
 930         /**
 931          * Initialise form fields in the object
 932          * Called on the first invocation, e.g. when a user clicks an edit link
 933          * @return bool If the requested section is valid
 934          */
 935         function initialiseForm() {
 936                 global $wgUser;
 937                 $this->edittime = $this->mArticle->getTimestamp();
 938
 939                 $content = $this->getContentObject( false ); #TODO: track content object?!
 940                 if ( $content === false ) {
 941                         return false;
 942                 }
 943                 $this->textbox1 = $this->toEditText( $content );
 944
 945                 // activate checkboxes if user wants them to be always active
 946                 # Sort out the "watch" checkbox
 947                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 948                         # Watch all edits
 949                         $this->watchthis = true;
 950                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 951                         # Watch creations
 952                         $this->watchthis = true;
 953                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 954                         # Already watched
 955                         $this->watchthis = true;
 956                 }
 957                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 958                         $this->minoredit = true;
 959                 }
 960                 if ( $this->textbox1 === false ) {
 961                         return false;
 962                 }
 963                 return true;
 964         }
 965
 966         /**
 967          * @param Content|null $def_content The default value to return
 968          *
 969          * @return Content|null Content on success, $def_content for invalid sections
 970          *
 971          * @since 1.21
 972          */
 973         protected function getContentObject( $def_content = null ) {
 974                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 975
 976                 $content = false;
 977
 978                 // For message page not locally set, use the i18n message.
 979                 // For other non-existent articles, use preload text if any.
 980                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 981                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 982                                 # If this is a system message, get the default text.
 983                                 $msg = $this->mTitle->getDefaultMessageText();
 984
 985                                 $content = $this->toEditContent( $msg );
 986                         }
 987                         if ( $content === false ) {
 988                                 # If requested, preload some text.
 989                                 $preload = $wgRequest->getVal( 'preload',
 990                                         // Custom preload text for new sections
 991                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 992                                 $params = $wgRequest->getArray( 'preloadparams', array() );
 993
 994                                 $content = $this->getPreloadedContent( $preload, $params );
 995                         }
 996                 // For existing pages, get text based on "undo" or section parameters.
 997                 } else {
 998                         if ( $this->section != '' ) {
 999                                 // Get section edit text (returns $def_text for invalid sections)
1000                                 $orig = $this->getOriginalContent( $wgUser );
1001                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1002
1003                                 if ( !$content ) {
1004                                         $content = $def_content;
1005                                 }
1006                         } else {
1007                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1008                                 $undo = $wgRequest->getInt( 'undo' );
1009
1010                                 if ( $undo > 0 && $undoafter > 0 ) {
1011
1012                                         $undorev = Revision::newFromId( $undo );
1013                                         $oldrev = Revision::newFromId( $undoafter );
1014
1015                                         # Sanity check, make sure it's the right page,
1016                                         # the revisions exist and they were not deleted.
1017                                         # Otherwise, $content will be left as-is.
1018                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1019                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1020                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1021
1022                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1023
1024                                                 if ( $content === false ) {
1025                                                         # Warn the user that something went wrong
1026                                                         $undoMsg = 'failure';
1027                                                 } else {
1028                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1029                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1030                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1031
1032                                                         if ( $newContent->equals( $oldContent ) ) {
1033                                                                 # Tell the user that the undo results in no change,
1034                                                                 # i.e. the revisions were already undone.
1035                                                                 $undoMsg = 'nochange';
1036                                                                 $content = false;
1037                                                         } else {
1038                                                                 # Inform the user of our success and set an automatic edit summary
1039                                                                 $undoMsg = 'success';
1040
1041                                                                 # If we just undid one rev, use an autosummary
1042                                                                 $firstrev = $oldrev->getNext();
1043                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1044                                                                         $userText = $undorev->getUserText();
1045                                                                         if ( $userText === '' ) {
1046                                                                                 $undoSummary = wfMessage(
1047                                                                                         'undo-summary-username-hidden',
1048                                                                                         $undo
1049                                                                                 )->inContentLanguage()->text();
1050                                                                         } else {
1051                                                                                 $undoSummary = wfMessage(
1052                                                                                         'undo-summary',
1053                                                                                         $undo,
1054                                                                                         $userText
1055                                                                                 )->inContentLanguage()->text();
1056                                                                         }
1057                                                                         if ( $this->summary === '' ) {
1058                                                                                 $this->summary = $undoSummary;
1059                                                                         } else {
1060                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1061                                                                                         ->inContentLanguage()->text() . $this->summary;
1062                                                                         }
1063                                                                         $this->undidRev = $undo;
1064                                                                 }
1065                                                                 $this->formtype = 'diff';
1066                                                         }
1067                                                 }
1068                                         } else {
1069                                                 // Failed basic sanity checks.
1070                                                 // Older revisions may have been removed since the link
1071                                                 // was created, or we may simply have got bogus input.
1072                                                 $undoMsg = 'norev';
1073                                         }
1074
1075                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1076                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1077                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1078                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1079                                 }
1080
1081                                 if ( $content === false ) {
1082                                         $content = $this->getOriginalContent( $wgUser );
1083                                 }
1084                         }
1085                 }
1086
1087                 return $content;
1088         }
1089
1090         /**
1091          * Get the content of the wanted revision, without section extraction.
1092          *
1093          * The result of this function can be used to compare user's input with
1094          * section replaced in its context (using WikiPage::replaceSection())
1095          * to the original text of the edit.
1096          *
1097          * This differs from Article::getContent() that when a missing revision is
1098          * encountered the result will be null and not the
1099          * 'missing-revision' message.
1100          *
1101          * @since 1.19
1102          * @param User $user The user to get the revision for
1103          * @return Content|null
1104          */
1105         private function getOriginalContent( User $user ) {
1106                 if ( $this->section == 'new' ) {
1107                         return $this->getCurrentContent();
1108                 }
1109                 $revision = $this->mArticle->getRevisionFetched();
1110                 if ( $revision === null ) {
1111                         if ( !$this->contentModel ) {
1112                                 $this->contentModel = $this->getTitle()->getContentModel();
1113                         }
1114                         $handler = ContentHandler::getForModelID( $this->contentModel );
1115
1116                         return $handler->makeEmptyContent();
1117                 }
1118                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1119                 return $content;
1120         }
1121
1122         /**
1123          * Get the current content of the page. This is basically similar to
1124          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1125          * content object is returned instead of null.
1126          *
1127          * @since 1.21
1128          * @return Content
1129          */
1130         protected function getCurrentContent() {
1131                 $rev = $this->mArticle->getRevision();
1132                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1133
1134                 if ( $content === false || $content === null ) {
1135                         if ( !$this->contentModel ) {
1136                                 $this->contentModel = $this->getTitle()->getContentModel();
1137                         }
1138                         $handler = ContentHandler::getForModelID( $this->contentModel );
1139
1140                         return $handler->makeEmptyContent();
1141                 } else {
1142                         # nasty side-effect, but needed for consistency
1143                         $this->contentModel = $rev->getContentModel();
1144                         $this->contentFormat = $rev->getContentFormat();
1145
1146                         return $content;
1147                 }
1148         }
1149
1150         /**
1151          * Use this method before edit() to preload some content into the edit box
1152          *
1153          * @param Content $content
1154          *
1155          * @since 1.21
1156          */
1157         public function setPreloadedContent( Content $content ) {
1158                 $this->mPreloadContent = $content;
1159         }
1160
1161         /**
1162          * Get the contents to be preloaded into the box, either set by
1163          * an earlier setPreloadText() or by loading the given page.
1164          *
1165          * @param string $preload Representing the title to preload from.
1166          * @param array $params Parameters to use (interface-message style) in the preloaded text
1167          *
1168          * @return Content
1169          *
1170          * @since 1.21
1171          */
1172         protected function getPreloadedContent( $preload, $params = array() ) {
1173                 global $wgUser;
1174
1175                 if ( !empty( $this->mPreloadContent ) ) {
1176                         return $this->mPreloadContent;
1177                 }
1178
1179                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1180
1181                 if ( $preload === '' ) {
1182                         return $handler->makeEmptyContent();
1183                 }
1184
1185                 $title = Title::newFromText( $preload );
1186                 # Check for existence to avoid getting MediaWiki:Noarticletext
1187                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1188                         //TODO: somehow show a warning to the user!
1189                         return $handler->makeEmptyContent();
1190                 }
1191
1192                 $page = WikiPage::factory( $title );
1193                 if ( $page->isRedirect() ) {
1194                         $title = $page->getRedirectTarget();
1195                         # Same as before
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                         $page = WikiPage::factory( $title );
1201                 }
1202
1203                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1204                 $content = $page->getContent( Revision::RAW );
1205
1206                 if ( !$content ) {
1207                         //TODO: somehow show a warning to the user!
1208                         return $handler->makeEmptyContent();
1209                 }
1210
1211                 if ( $content->getModel() !== $handler->getModelID() ) {
1212                         $converted = $content->convert( $handler->getModelID() );
1213
1214                         if ( !$converted ) {
1215                                 //TODO: somehow show a warning to the user!
1216                                 wfDebug( "Attempt to preload incompatible content: "
1217                                                 . "can't convert " . $content->getModel()
1218                                                 . " to " . $handler->getModelID() );
1219
1220                                 return $handler->makeEmptyContent();
1221                         }
1222
1223                         $content = $converted;
1224                 }
1225
1226                 return $content->preloadTransform( $title, $parserOptions, $params );
1227         }
1228
1229         /**
1230          * Make sure the form isn't faking a user's credentials.
1231          *
1232          * @param WebRequest $request
1233          * @return bool
1234          * @private
1235          */
1236         function tokenOk( &$request ) {
1237                 global $wgUser;
1238                 $token = $request->getVal( 'wpEditToken' );
1239                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1240                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1241                 return $this->mTokenOk;
1242         }
1243
1244         /**
1245          * Sets post-edit cookie indicating the user just saved a particular revision.
1246          *
1247          * This uses a temporary cookie for each revision ID so separate saves will never
1248          * interfere with each other.
1249          *
1250          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1251          * the redirect.  It must be clearable by JavaScript code, so it must not be
1252          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1253          * variable.
1254          *
1255          * If the variable were set on the server, it would be cached, which is unwanted
1256          * since the post-edit state should only apply to the load right after the save.
1257          *
1258          * @param int $statusValue The status value (to check for new article status)
1259          */
1260         protected function setPostEditCookie( $statusValue ) {
1261                 $revisionId = $this->mArticle->getLatest();
1262                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1263
1264                 $val = 'saved';
1265                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1266                         $val = 'created';
1267                 } elseif ( $this->oldid ) {
1268                         $val = 'restored';
1269                 }
1270
1271                 $response = RequestContext::getMain()->getRequest()->response();
1272                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1273                         'httpOnly' => false,
1274                 ) );
1275         }
1276
1277         /**
1278          * Attempt submission
1279          * @param array $resultDetails See docs for $result in internalAttemptSave
1280          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1281          * @return Status The resulting status object.
1282          */
1283         public function attemptSave( &$resultDetails = false ) {
1284                 global $wgUser;
1285
1286                 # Allow bots to exempt some edits from bot flagging
1287                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1288                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1289
1290                 Hooks::run( 'EditPage::attemptSave:after', array( $this, $status, $resultDetails ) );
1291
1292                 return $status;
1293         }
1294
1295         /**
1296          * Handle status, such as after attempt save
1297          *
1298          * @param Status $status
1299          * @param array|bool $resultDetails
1300          *
1301          * @throws ErrorPageError
1302          * @return bool False, if output is done, true if rest of the form should be displayed
1303          */
1304         private function handleStatus( Status $status, $resultDetails ) {
1305                 global $wgUser, $wgOut;
1306
1307                 /**
1308                  * @todo FIXME: once the interface for internalAttemptSave() is made
1309                  *   nicer, this should use the message in $status
1310                  */
1311                 if ( $status->value == self::AS_SUCCESS_UPDATE
1312                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1313                 ) {
1314                         $this->didSave = true;
1315                         if ( !$resultDetails['nullEdit'] ) {
1316                                 $this->setPostEditCookie( $status->value );
1317                         }
1318                 }
1319
1320                 switch ( $status->value ) {
1321                         case self::AS_HOOK_ERROR_EXPECTED:
1322                         case self::AS_CONTENT_TOO_BIG:
1323                         case self::AS_ARTICLE_WAS_DELETED:
1324                         case self::AS_CONFLICT_DETECTED:
1325                         case self::AS_SUMMARY_NEEDED:
1326                         case self::AS_TEXTBOX_EMPTY:
1327                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1328                         case self::AS_END:
1329                         case self::AS_BLANK_ARTICLE:
1330                         case self::AS_SELF_REDIRECT:
1331                                 return true;
1332
1333                         case self::AS_HOOK_ERROR:
1334                                 return false;
1335
1336                         case self::AS_PARSE_ERROR:
1337                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1338                                 return true;
1339
1340                         case self::AS_SUCCESS_NEW_ARTICLE:
1341                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1342                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1343                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1344                                 return false;
1345
1346                         case self::AS_SUCCESS_UPDATE:
1347                                 $extraQuery = '';
1348                                 $sectionanchor = $resultDetails['sectionanchor'];
1349
1350                                 // Give extensions a chance to modify URL query on update
1351                                 Hooks::run(
1352                                         'ArticleUpdateBeforeRedirect',
1353                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1354                                 );
1355
1356                                 if ( $resultDetails['redirect'] ) {
1357                                         if ( $extraQuery == '' ) {
1358                                                 $extraQuery = 'redirect=no';
1359                                         } else {
1360                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1361                                         }
1362                                 }
1363                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1364                                 return false;
1365
1366                         case self::AS_SPAM_ERROR:
1367                                 $this->spamPageWithContent( $resultDetails['spam'] );
1368                                 return false;
1369
1370                         case self::AS_BLOCKED_PAGE_FOR_USER:
1371                                 throw new UserBlockedError( $wgUser->getBlock() );
1372
1373                         case self::AS_IMAGE_REDIRECT_ANON:
1374                         case self::AS_IMAGE_REDIRECT_LOGGED:
1375                                 throw new PermissionsError( 'upload' );
1376
1377                         case self::AS_READ_ONLY_PAGE_ANON:
1378                         case self::AS_READ_ONLY_PAGE_LOGGED:
1379                                 throw new PermissionsError( 'edit' );
1380
1381                         case self::AS_READ_ONLY_PAGE:
1382                                 throw new ReadOnlyError;
1383
1384                         case self::AS_RATE_LIMITED:
1385                                 throw new ThrottledError();
1386
1387                         case self::AS_NO_CREATE_PERMISSION:
1388                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1389                                 throw new PermissionsError( $permission );
1390
1391                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1392                                 throw new PermissionsError( 'editcontentmodel' );
1393
1394                         default:
1395                                 // We don't recognize $status->value. The only way that can happen
1396                                 // is if an extension hook aborted from inside ArticleSave.
1397                                 // Render the status object into $this->hookError
1398                                 // FIXME this sucks, we should just use the Status object throughout
1399                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1400                                         '</div>';
1401                                 return true;
1402                 }
1403         }
1404
1405         /**
1406          * Run hooks that can filter edits just before they get saved.
1407          *
1408          * @param Content $content The Content to filter.
1409          * @param Status $status For reporting the outcome to the caller
1410          * @param User $user The user performing the edit
1411          *
1412          * @return bool
1413          */
1414         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1415                 // Run old style post-section-merge edit filter
1416                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1417                         array( $this, $content, &$this->hookError, $this->summary ) )
1418                 ) {
1419                         # Error messages etc. could be handled within the hook...
1420                         $status->fatal( 'hookaborted' );
1421                         $status->value = self::AS_HOOK_ERROR;
1422                         return false;
1423                 } elseif ( $this->hookError != '' ) {
1424                         # ...or the hook could be expecting us to produce an error
1425                         $status->fatal( 'hookaborted' );
1426                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1427                         return false;
1428                 }
1429
1430                 // Run new style post-section-merge edit filter
1431                 if ( !Hooks::run( 'EditFilterMergedContent',
1432                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1433                                 $user, $this->minoredit ) )
1434                 ) {
1435                         # Error messages etc. could be handled within the hook...
1436                         if ( $status->isGood() ) {
1437                                 $status->fatal( 'hookaborted' );
1438                                 // Not setting $this->hookError here is a hack to allow the hook
1439                                 // to cause a return to the edit page without $this->hookError
1440                                 // being set. This is used by ConfirmEdit to display a captcha
1441                                 // without any error message cruft.
1442                         } else {
1443                                 $this->hookError = $status->getWikiText();
1444                         }
1445                         // Use the existing $status->value if the hook set it
1446                         if ( !$status->value ) {
1447                                 $status->value = self::AS_HOOK_ERROR;
1448                         }
1449                         return false;
1450                 } elseif ( !$status->isOK() ) {
1451                         # ...or the hook could be expecting us to produce an error
1452                         // FIXME this sucks, we should just use the Status object throughout
1453                         $this->hookError = $status->getWikiText();
1454                         $status->fatal( 'hookaborted' );
1455                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1456                         return false;
1457                 }
1458
1459                 return true;
1460         }
1461
1462         /**
1463          * Return the summary to be used for a new section.
1464          *
1465          * @param string $sectionanchor Set to the section anchor text
1466          * @return string
1467          */
1468         private function newSectionSummary( &$sectionanchor = null ) {
1469                 global $wgParser;
1470
1471                 if ( $this->sectiontitle !== '' ) {
1472                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1473                         // If no edit summary was specified, create one automatically from the section
1474                         // title and have it link to the new section. Otherwise, respect the summary as
1475                         // passed.
1476                         if ( $this->summary === '' ) {
1477                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1478                                 return wfMessage( 'newsectionsummary' )
1479                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1480                         }
1481                 } elseif ( $this->summary !== '' ) {
1482                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1483                         # This is a new section, so create a link to the new section
1484                         # in the revision summary.
1485                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1486                         return wfMessage( 'newsectionsummary' )
1487                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1488                 }
1489                 return $this->summary;
1490         }
1491
1492         /**
1493          * Attempt submission (no UI)
1494          *
1495          * @param array $result Array to add statuses to, currently with the
1496          *   possible keys:
1497          *   - spam (string): Spam string from content if any spam is detected by
1498          *     matchSpamRegex.
1499          *   - sectionanchor (string): Section anchor for a section save.
1500          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1501          *     false otherwise.
1502          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1503          *     revision is a redirect.
1504          * @param bool $bot True if edit is being made under the bot right.
1505          *
1506          * @return Status Status object, possibly with a message, but always with
1507          *   one of the AS_* constants in $status->value,
1508          *
1509          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1510          *   various error display idiosyncrasies. There are also lots of cases
1511          *   where error metadata is set in the object and retrieved later instead
1512          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1513          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1514          * time.
1515          */
1516         function internalAttemptSave( &$result, $bot = false ) {
1517                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1518
1519                 $status = Status::newGood();
1520
1521                 if ( !Hooks::run( '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                         return $status;
1526                 }
1527
1528                 $spam = $wgRequest->getText( 'wpAntispam' );
1529                 if ( $spam !== '' ) {
1530                         wfDebugLog(
1531                                 'SimpleAntiSpam',
1532                                 $wgUser->getName() .
1533                                 ' editing "' .
1534                                 $this->mTitle->getPrefixedText() .
1535                                 '" submitted bogus field "' .
1536                                 $spam .
1537                                 '"'
1538                         );
1539                         $status->fatal( 'spamprotectionmatch', false );
1540                         $status->value = self::AS_SPAM_ERROR;
1541                         return $status;
1542                 }
1543
1544                 try {
1545                         # Construct Content object
1546                         $textbox_content = $this->toEditContent( $this->textbox1 );
1547                 } catch ( MWContentSerializationException $ex ) {
1548                         $status->fatal(
1549                                 'content-failed-to-parse',
1550                                 $this->contentModel,
1551                                 $this->contentFormat,
1552                                 $ex->getMessage()
1553                         );
1554                         $status->value = self::AS_PARSE_ERROR;
1555                         return $status;
1556                 }
1557
1558                 # Check image redirect
1559                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1560                         $textbox_content->isRedirect() &&
1561                         !$wgUser->isAllowed( 'upload' )
1562                 ) {
1563                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1564                                 $status->setResult( false, $code );
1565
1566                                 return $status;
1567                 }
1568
1569                 # Check for spam
1570                 $match = self::matchSummarySpamRegex( $this->summary );
1571                 if ( $match === false && $this->section == 'new' ) {
1572                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1573                         # regular summaries, it is added to the actual wikitext.
1574                         if ( $this->sectiontitle !== '' ) {
1575                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1576                                 $match = self::matchSpamRegex( $this->sectiontitle );
1577                         } else {
1578                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1579                                 # is used with the 'summary' parameter.
1580                                 $match = self::matchSpamRegex( $this->summary );
1581                         }
1582                 }
1583                 if ( $match === false ) {
1584                         $match = self::matchSpamRegex( $this->textbox1 );
1585                 }
1586                 if ( $match !== false ) {
1587                         $result['spam'] = $match;
1588                         $ip = $wgRequest->getIP();
1589                         $pdbk = $this->mTitle->getPrefixedDBkey();
1590                         $match = str_replace( "\n", '', $match );
1591                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1592                         $status->fatal( 'spamprotectionmatch', $match );
1593                         $status->value = self::AS_SPAM_ERROR;
1594                         return $status;
1595                 }
1596                 if ( !Hooks::run(
1597                         'EditFilter',
1598                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1599                 ) {
1600                         # Error messages etc. could be handled within the hook...
1601                         $status->fatal( 'hookaborted' );
1602                         $status->value = self::AS_HOOK_ERROR;
1603                         return $status;
1604                 } elseif ( $this->hookError != '' ) {
1605                         # ...or the hook could be expecting us to produce an error
1606                         $status->fatal( 'hookaborted' );
1607                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1608                         return $status;
1609                 }
1610
1611                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1612                         // Auto-block user's IP if the account was "hard" blocked
1613                         $wgUser->spreadAnyEditBlock();
1614                         # Check block state against master, thus 'false'.
1615                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1616                         return $status;
1617                 }
1618
1619                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1620                 if ( $this->kblength > $wgMaxArticleSize ) {
1621                         // Error will be displayed by showEditForm()
1622                         $this->tooBig = true;
1623                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1624                         return $status;
1625                 }
1626
1627                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1628                         if ( $wgUser->isAnon() ) {
1629                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1630                                 return $status;
1631                         } else {
1632                                 $status->fatal( 'readonlytext' );
1633                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1634                                 return $status;
1635                         }
1636                 }
1637
1638                 if ( $this->contentModel !== $this->mTitle->getContentModel()
1639                         && !$wgUser->isAllowed( 'editcontentmodel' )
1640                 ) {
1641                         $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1642                         return $status;
1643                 }
1644
1645                 if ( wfReadOnly() ) {
1646                         $status->fatal( 'readonlytext' );
1647                         $status->value = self::AS_READ_ONLY_PAGE;
1648                         return $status;
1649                 }
1650                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1651                         $status->fatal( 'actionthrottledtext' );
1652                         $status->value = self::AS_RATE_LIMITED;
1653                         return $status;
1654                 }
1655
1656                 # If the article has been deleted while editing, don't save it without
1657                 # confirmation
1658                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1659                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1660                         return $status;
1661                 }
1662
1663                 # Load the page data from the master. If anything changes in the meantime,
1664                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1665                 $this->mArticle->loadPageData( 'fromdbmaster' );
1666                 $new = !$this->mArticle->exists();
1667
1668                 if ( $new ) {
1669                         // Late check for create permission, just in case *PARANOIA*
1670                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1671                                 $status->fatal( 'nocreatetext' );
1672                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1673                                 wfDebug( __METHOD__ . ": no create permission\n" );
1674                                 return $status;
1675                         }
1676
1677                         // Don't save a new page if it's blank or if it's a MediaWiki:
1678                         // message with content equivalent to default (allow empty pages
1679                         // in this case to disable messages, see bug 50124)
1680                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1681                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1682                                 $defaultText = $defaultMessageText;
1683                         } else {
1684                                 $defaultText = '';
1685                         }
1686
1687                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1688                                 $this->blankArticle = true;
1689                                 $status->fatal( 'blankarticle' );
1690                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1691                                 return $status;
1692                         }
1693
1694                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1695                                 return $status;
1696                         }
1697
1698                         $content = $textbox_content;
1699
1700                         $result['sectionanchor'] = '';
1701                         if ( $this->section == 'new' ) {
1702                                 if ( $this->sectiontitle !== '' ) {
1703                                         // Insert the section title above the content.
1704                                         $content = $content->addSectionHeader( $this->sectiontitle );
1705                                 } elseif ( $this->summary !== '' ) {
1706                                         // Insert the section title above the content.
1707                                         $content = $content->addSectionHeader( $this->summary );
1708                                 }
1709                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1710                         }
1711
1712                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1713
1714                 } else { # not $new
1715
1716                         # Article exists. Check for edit conflict.
1717
1718                         $this->mArticle->clear(); # Force reload of dates, etc.
1719                         $timestamp = $this->mArticle->getTimestamp();
1720
1721                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1722
1723                         if ( $timestamp != $this->edittime ) {
1724                                 $this->isConflict = true;
1725                                 if ( $this->section == 'new' ) {
1726                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1727                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1728                                         ) {
1729                                                 // Probably a duplicate submission of a new comment.
1730                                                 // This can happen when squid resends a request after
1731                                                 // a timeout but the first one actually went through.
1732                                                 wfDebug( __METHOD__
1733                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1734                                         } else {
1735                                                 // New comment; suppress conflict.
1736                                                 $this->isConflict = false;
1737                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1738                                         }
1739                                 } elseif ( $this->section == ''
1740                                         && Revision::userWasLastToEdit(
1741                                                 DB_MASTER, $this->mTitle->getArticleID(),
1742                                                 $wgUser->getId(), $this->edittime
1743                                         )
1744                                 ) {
1745                                         # Suppress edit conflict with self, except for section edits where merging is required.
1746                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1747                                         $this->isConflict = false;
1748                                 }
1749                         }
1750
1751                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1752                         if ( $this->sectiontitle !== '' ) {
1753                                 $sectionTitle = $this->sectiontitle;
1754                         } else {
1755                                 $sectionTitle = $this->summary;
1756                         }
1757
1758                         $content = null;
1759
1760                         if ( $this->isConflict ) {
1761                                 wfDebug( __METHOD__
1762                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1763                                         . " (article time '{$timestamp}')\n" );
1764
1765                                 $content = $this->mArticle->replaceSectionContent(
1766                                         $this->section,
1767                                         $textbox_content,
1768                                         $sectionTitle,
1769                                         $this->edittime
1770                                 );
1771                         } else {
1772                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1773                                 $content = $this->mArticle->replaceSectionContent(
1774                                         $this->section,
1775                                         $textbox_content,
1776                                         $sectionTitle
1777                                 );
1778                         }
1779
1780                         if ( is_null( $content ) ) {
1781                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1782                                 $this->isConflict = true;
1783                                 $content = $textbox_content; // do not try to merge here!
1784                         } elseif ( $this->isConflict ) {
1785                                 # Attempt merge
1786                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1787                                         // Successful merge! Maybe we should tell the user the good news?
1788                                         $this->isConflict = false;
1789                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1790                                 } else {
1791                                         $this->section = '';
1792                                         $this->textbox1 = ContentHandler::getContentText( $content );
1793                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1794                                 }
1795                         }
1796
1797                         if ( $this->isConflict ) {
1798                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1799                                 return $status;
1800                         }
1801
1802                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1803                                 return $status;
1804                         }
1805
1806                         if ( $this->section == 'new' ) {
1807                                 // Handle the user preference to force summaries here
1808                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1809                                         $this->missingSummary = true;
1810                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1811                                         $status->value = self::AS_SUMMARY_NEEDED;
1812                                         return $status;
1813                                 }
1814
1815                                 // Do not allow the user to post an empty comment
1816                                 if ( $this->textbox1 == '' ) {
1817                                         $this->missingComment = true;
1818                                         $status->fatal( 'missingcommenttext' );
1819                                         $status->value = self::AS_TEXTBOX_EMPTY;
1820                                         return $status;
1821                                 }
1822                         } elseif ( !$this->allowBlankSummary
1823                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1824                                 && !$content->isRedirect()
1825                                 && md5( $this->summary ) == $this->autoSumm
1826                         ) {
1827                                 $this->missingSummary = true;
1828                                 $status->fatal( 'missingsummary' );
1829                                 $status->value = self::AS_SUMMARY_NEEDED;
1830                                 return $status;
1831                         }
1832
1833                         # All's well
1834                         $sectionanchor = '';
1835                         if ( $this->section == 'new' ) {
1836                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1837                         } elseif ( $this->section != '' ) {
1838                                 # Try to get a section anchor from the section source, redirect
1839                                 # to edited section if header found.
1840                                 # XXX: Might be better to integrate this into Article::replaceSection
1841                                 # for duplicate heading checking and maybe parsing.
1842                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1843                                 # We can't deal with anchors, includes, html etc in the header for now,
1844                                 # headline would need to be parsed to improve this.
1845                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1846                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1847                                 }
1848                         }
1849                         $result['sectionanchor'] = $sectionanchor;
1850
1851                         // Save errors may fall down to the edit form, but we've now
1852                         // merged the section into full text. Clear the section field
1853                         // so that later submission of conflict forms won't try to
1854                         // replace that into a duplicated mess.
1855                         $this->textbox1 = $this->toEditText( $content );
1856                         $this->section = '';
1857
1858                         $status->value = self::AS_SUCCESS_UPDATE;
1859                 }
1860
1861                 if ( !$this->allowSelfRedirect
1862                         && $content->isRedirect()
1863                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1864                 ) {
1865                         // If the page already redirects to itself, don't warn.
1866                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1867                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1868                                 $this->selfRedirect = true;
1869                                 $status->fatal( 'selfredirect' );
1870                                 $status->value = self::AS_SELF_REDIRECT;
1871                                 return $status;
1872                         }
1873                 }
1874
1875                 // Check for length errors again now that the section is merged in
1876                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1877                 if ( $this->kblength > $wgMaxArticleSize ) {
1878                         $this->tooBig = true;
1879                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1880                         return $status;
1881                 }
1882
1883                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1884                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1885                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1886                         ( $bot ? EDIT_FORCE_BOT : 0 );
1887
1888                 $doEditStatus = $this->mArticle->doEditContent(
1889                         $content,
1890                         $this->summary,
1891                         $flags,
1892                         false,
1893                         null,
1894                         $content->getDefaultFormat()
1895                 );
1896
1897                 if ( !$doEditStatus->isOK() ) {
1898                         // Failure from doEdit()
1899                         // Show the edit conflict page for certain recognized errors from doEdit(),
1900                         // but don't show it for errors from extension hooks
1901                         $errors = $doEditStatus->getErrorsArray();
1902                         if ( in_array( $errors[0][0],
1903                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1904                         ) {
1905                                 $this->isConflict = true;
1906                                 // Destroys data doEdit() put in $status->value but who cares
1907                                 $doEditStatus->value = self::AS_END;
1908                         }
1909                         return $doEditStatus;
1910                 }
1911
1912                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1913                 if ( $result['nullEdit'] ) {
1914                         // We don't know if it was a null edit until now, so increment here
1915                         $wgUser->pingLimiter( 'linkpurge' );
1916                 }
1917                 $result['redirect'] = $content->isRedirect();
1918                 $this->updateWatchlist();
1919                 return $status;
1920         }
1921
1922         /**
1923          * Register the change of watch status
1924          */
1925         protected function updateWatchlist() {
1926                 global $wgUser;
1927
1928                 if ( $wgUser->isLoggedIn()
1929                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1930                 ) {
1931                         $fname = __METHOD__;
1932                         $title = $this->mTitle;
1933                         $watch = $this->watchthis;
1934
1935                         // Do this in its own transaction to reduce contention...
1936                         $dbw = wfGetDB( DB_MASTER );
1937                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1938                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1939                         } );
1940                 }
1941         }
1942
1943         /**
1944          * Attempts to do 3-way merge of edit content with a base revision
1945          * and current content, in case of edit conflict, in whichever way appropriate
1946          * for the content type.
1947          *
1948          * @since 1.21
1949          *
1950          * @param Content $editContent
1951          *
1952          * @return bool
1953          */
1954         private function mergeChangesIntoContent( &$editContent ) {
1955
1956                 $db = wfGetDB( DB_MASTER );
1957
1958                 // This is the revision the editor started from
1959                 $baseRevision = $this->getBaseRevision();
1960                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1961
1962                 if ( is_null( $baseContent ) ) {
1963                         return false;
1964                 }
1965
1966                 // The current state, we want to merge updates into it
1967                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1968                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1969
1970                 if ( is_null( $currentContent ) ) {
1971                         return false;
1972                 }
1973
1974                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1975
1976                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1977
1978                 if ( $result ) {
1979                         $editContent = $result;
1980                         return true;
1981                 }
1982
1983                 return false;
1984         }
1985
1986         /**
1987          * @return Revision
1988          */
1989         function getBaseRevision() {
1990                 if ( !$this->mBaseRevision ) {
1991                         $db = wfGetDB( DB_MASTER );
1992                         $this->mBaseRevision = Revision::loadFromTimestamp(
1993                                 $db, $this->mTitle, $this->edittime );
1994                 }
1995                 return $this->mBaseRevision;
1996         }
1997
1998         /**
1999          * Check given input text against $wgSpamRegex, and return the text of the first match.
2000          *
2001          * @param string $text
2002          *
2003          * @return string|bool Matching string or false
2004          */
2005         public static function matchSpamRegex( $text ) {
2006                 global $wgSpamRegex;
2007                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2008                 $regexes = (array)$wgSpamRegex;
2009                 return self::matchSpamRegexInternal( $text, $regexes );
2010         }
2011
2012         /**
2013          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2014          *
2015          * @param string $text
2016          *
2017          * @return string|bool Matching string or false
2018          */
2019         public static function matchSummarySpamRegex( $text ) {
2020                 global $wgSummarySpamRegex;
2021                 $regexes = (array)$wgSummarySpamRegex;
2022                 return self::matchSpamRegexInternal( $text, $regexes );
2023         }
2024
2025         /**
2026          * @param string $text
2027          * @param array $regexes
2028          * @return bool|string
2029          */
2030         protected static function matchSpamRegexInternal( $text, $regexes ) {
2031                 foreach ( $regexes as $regex ) {
2032                         $matches = array();
2033                         if ( preg_match( $regex, $text, $matches ) ) {
2034                                 return $matches[0];
2035                         }
2036                 }
2037                 return false;
2038         }
2039
2040         function setHeaders() {
2041                 global $wgOut, $wgUser, $wgAjaxEditStash;
2042
2043                 $wgOut->addModules( 'mediawiki.action.edit' );
2044                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2045
2046                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2047                         // The addition of default buttons is handled by getEditToolbar() which
2048                         // has its own dependency on this module. The call here ensures the module
2049                         // is loaded in time (it has position "top") for other modules to register
2050                         // buttons (e.g. extensions, gadgets, user scripts).
2051                         $wgOut->addModules( 'mediawiki.toolbar' );
2052                 }
2053
2054                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2055                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2056                 }
2057
2058                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2059                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2060                 }
2061
2062                 if ( $wgAjaxEditStash ) {
2063                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2064                 }
2065
2066                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2067
2068                 # Enabled article-related sidebar, toplinks, etc.
2069                 $wgOut->setArticleRelated( true );
2070
2071                 $contextTitle = $this->getContextTitle();
2072                 if ( $this->isConflict ) {
2073                         $msg = 'editconflict';
2074                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2075                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2076                 } else {
2077                         $msg = $contextTitle->exists()
2078                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2079                                         && $contextTitle->getDefaultMessageText() !== false
2080                                 )
2081                                 ? 'editing'
2082                                 : 'creating';
2083                 }
2084
2085                 # Use the title defined by DISPLAYTITLE magic word when present
2086                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2087                 if ( $displayTitle === false ) {
2088                         $displayTitle = $contextTitle->getPrefixedText();
2089                 }
2090                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2091                 # Transmit the name of the message to JavaScript for live preview
2092                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2093                 $wgOut->addJsConfigVars( 'wgEditMessage', $msg );
2094         }
2095
2096         /**
2097          * Show all applicable editing introductions
2098          */
2099         protected function showIntro() {
2100                 global $wgOut, $wgUser;
2101                 if ( $this->suppressIntro ) {
2102                         return;
2103                 }
2104
2105                 $namespace = $this->mTitle->getNamespace();
2106
2107                 if ( $namespace == NS_MEDIAWIKI ) {
2108                         # Show a warning if editing an interface message
2109                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2110                         # If this is a default message (but not css or js),
2111                         # show a hint that it is translatable on translatewiki.net
2112                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2113                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2114                         ) {
2115                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2116                                 if ( $defaultMessageText !== false ) {
2117                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2118                                                 'translateinterface' );
2119                                 }
2120                         }
2121                 } elseif ( $namespace == NS_FILE ) {
2122                         # Show a hint to shared repo
2123                         $file = wfFindFile( $this->mTitle );
2124                         if ( $file && !$file->isLocal() ) {
2125                                 $descUrl = $file->getDescriptionUrl();
2126                                 # there must be a description url to show a hint to shared repo
2127                                 if ( $descUrl ) {
2128                                         if ( !$this->mTitle->exists() ) {
2129                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2130                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2131                                                 ) );
2132                                         } else {
2133                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2134                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2135                                                 ) );
2136                                         }
2137                                 }
2138                         }
2139                 }
2140
2141                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2142                 # Show log extract when the user is currently blocked
2143                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2144                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2145                         $username = $parts[0];
2146                         $user = User::newFromName( $username, false /* allow IP users*/ );
2147                         $ip = User::isIP( $username );
2148                         $block = Block::newFromTarget( $user, $user );
2149                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2150                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2151                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2152                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2153                                 # Show log extract if the user is currently blocked
2154                                 LogEventsList::showLogExtract(
2155                                         $wgOut,
2156                                         'block',
2157                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2158                                         '',
2159                                         array(
2160                                                 'lim' => 1,
2161                                                 'showIfEmpty' => false,
2162                                                 'msgKey' => array(
2163                                                         'blocked-notice-logextract',
2164                                                         $user->getName() # Support GENDER in notice
2165                                                 )
2166                                         )
2167                                 );
2168                         }
2169                 }
2170                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2171                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2172                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2173                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2174                         ) );
2175                         if ( $wgUser->isLoggedIn() ) {
2176                                 $wgOut->wrapWikiMsg(
2177                                         // Suppress the external link icon, consider the help url an internal one
2178                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2179                                         array(
2180                                                 'newarticletext',
2181                                                 $helpLink
2182                                         )
2183                                 );
2184                         } else {
2185                                 $wgOut->wrapWikiMsg(
2186                                         // Suppress the external link icon, consider the help url an internal one
2187                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2188                                         array(
2189                                                 'newarticletextanon',
2190                                                 $helpLink
2191                                         )
2192                                 );
2193                         }
2194                 }
2195                 # Give a notice if the user is editing a deleted/moved page...
2196                 if ( !$this->mTitle->exists() ) {
2197                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2198                                 '',
2199                                 array(
2200                                         'lim' => 10,
2201                                         'conds' => array( "log_action != 'revision'" ),
2202                                         'showIfEmpty' => false,
2203                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2204                                 )
2205                         );
2206                 }
2207         }
2208
2209         /**
2210          * Attempt to show a custom editing introduction, if supplied
2211          *
2212          * @return bool
2213          */
2214         protected function showCustomIntro() {
2215                 if ( $this->editintro ) {
2216                         $title = Title::newFromText( $this->editintro );
2217                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2218                                 global $wgOut;
2219                                 // Added using template syntax, to take <noinclude>'s into account.
2220                                 $wgOut->addWikiTextTitleTidy(
2221                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2222                                         $this->mTitle
2223                                 );
2224                                 return true;
2225                         }
2226                 }
2227                 return false;
2228         }
2229
2230         /**
2231          * Gets an editable textual representation of $content.
2232          * The textual representation can be turned by into a Content object by the
2233          * toEditContent() method.
2234          *
2235          * If $content is null or false or a string, $content is returned unchanged.
2236          *
2237          * If the given Content object is not of a type that can be edited using
2238          * the text base EditPage, an exception will be raised. Set
2239          * $this->allowNonTextContent to true to allow editing of non-textual
2240          * content.
2241          *
2242          * @param Content|null|bool|string $content
2243          * @return string The editable text form of the content.
2244          *
2245          * @throws MWException If $content is not an instance of TextContent and
2246          *   $this->allowNonTextContent is not true.
2247          */
2248         protected function toEditText( $content ) {
2249                 if ( $content === null || $content === false || is_string( $content ) ) {
2250                         return $content;
2251                 }
2252
2253                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2254                         throw new MWException( 'This content model is not supported: '
2255                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2256                 }
2257
2258                 return $content->serialize( $this->contentFormat );
2259         }
2260
2261         /**
2262          * Turns the given text into a Content object by unserializing it.
2263          *
2264          * If the resulting Content object is not of a type that can be edited using
2265          * the text base EditPage, an exception will be raised. Set
2266          * $this->allowNonTextContent to true to allow editing of non-textual
2267          * content.
2268          *
2269          * @param string|null|bool $text Text to unserialize
2270          * @return Content The content object created from $text. If $text was false
2271          *   or null, false resp. null will be  returned instead.
2272          *
2273          * @throws MWException If unserializing the text results in a Content
2274          *   object that is not an instance of TextContent and
2275          *   $this->allowNonTextContent is not true.
2276          */
2277         protected function toEditContent( $text ) {
2278                 if ( $text === false || $text === null ) {
2279                         return $text;
2280                 }
2281
2282                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2283                         $this->contentModel, $this->contentFormat );
2284
2285                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2286                         throw new MWException( 'This content model is not supported: '
2287                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2288                 }
2289
2290                 return $content;
2291         }
2292
2293         /**
2294          * Send the edit form and related headers to $wgOut
2295          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2296          *     during form output near the top, for captchas and the like.
2297          *
2298          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2299          * use the EditPage::showEditForm:fields hook instead.
2300          */
2301         function showEditForm( $formCallback = null ) {
2302                 global $wgOut, $wgUser;
2303
2304                 # need to parse the preview early so that we know which templates are used,
2305                 # otherwise users with "show preview after edit box" will get a blank list
2306                 # we parse this near the beginning so that setHeaders can do the title
2307                 # setting work instead of leaving it in getPreviewText
2308                 $previewOutput = '';
2309                 if ( $this->formtype == 'preview' ) {
2310                         $previewOutput = $this->getPreviewText();
2311                 }
2312
2313                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2314
2315                 $this->setHeaders();
2316
2317                 if ( $this->showHeader() === false ) {
2318                         return;
2319                 }
2320
2321                 $wgOut->addHTML( $this->editFormPageTop );
2322
2323                 if ( $wgUser->getOption( 'previewontop' ) ) {
2324                         $this->displayPreviewArea( $previewOutput, true );
2325                 }
2326
2327                 $wgOut->addHTML( $this->editFormTextTop );
2328
2329                 $showToolbar = true;
2330                 if ( $this->wasDeletedSinceLastEdit() ) {
2331                         if ( $this->formtype == 'save' ) {
2332                                 // Hide the toolbar and edit area, user can click preview to get it back
2333                                 // Add an confirmation checkbox and explanation.
2334                                 $showToolbar = false;
2335                         } else {
2336                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2337                                         'deletedwhileediting' );
2338                         }
2339                 }
2340
2341                 // @todo add EditForm plugin interface and use it here!
2342                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2343                 $wgOut->addHTML( Html::openElement(
2344                         'form',
2345                         array(
2346                                 'id' => self::EDITFORM_ID,
2347                                 'name' => self::EDITFORM_ID,
2348                                 'method' => 'post',
2349                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2350                                 'enctype' => 'multipart/form-data'
2351                         )
2352                 ) );
2353
2354                 if ( is_callable( $formCallback ) ) {
2355                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2356                         call_user_func_array( $formCallback, array( &$wgOut ) );
2357                 }
2358
2359                 // Add an empty field to trip up spambots
2360                 $wgOut->addHTML(
2361                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2362                         . Html::rawElement(
2363                                 'label',
2364                                 array( 'for' => 'wpAntiSpam' ),
2365                                 wfMessage( 'simpleantispam-label' )->parse()
2366                         )
2367                         . Xml::element(
2368                                 'input',
2369                                 array(
2370                                         'type' => 'text',
2371                                         'name' => 'wpAntispam',
2372                                         'id' => 'wpAntispam',
2373                                         'value' => ''
2374                                 )
2375                         )
2376                         . Xml::closeElement( 'div' )
2377                 );
2378
2379                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2380
2381                 // Put these up at the top to ensure they aren't lost on early form submission
2382                 $this->showFormBeforeText();
2383
2384                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2385                         $username = $this->lastDelete->user_name;
2386                         $comment = $this->lastDelete->log_comment;
2387
2388                         // It is better to not parse the comment at all than to have templates expanded in the middle
2389                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2390                         $key = $comment === ''
2391                                 ? 'confirmrecreate-noreason'
2392                                 : 'confirmrecreate';
2393                         $wgOut->addHTML(
2394                                 '<div class="mw-confirm-recreate">' .
2395                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2396                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2397                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2398                                 ) .
2399                                 '</div>'
2400                         );
2401                 }
2402
2403                 # When the summary is hidden, also hide them on preview/show changes
2404                 if ( $this->nosummary ) {
2405                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2406                 }
2407
2408                 # If a blank edit summary was previously provided, and the appropriate
2409                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2410                 # user being bounced back more than once in the event that a summary
2411                 # is not required.
2412                 #####
2413                 # For a bit more sophisticated detection of blank summaries, hash the
2414                 # automatic one and pass that in the hidden field wpAutoSummary.
2415                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2416                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2417                 }
2418
2419                 if ( $this->undidRev ) {
2420                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2421                 }
2422
2423                 if ( $this->selfRedirect ) {
2424                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2425                 }
2426
2427                 if ( $this->hasPresetSummary ) {
2428                         // If a summary has been preset using &summary= we don't want to prompt for
2429                         // a different summary. Only prompt for a summary if the summary is blanked.
2430                         // (Bug 17416)
2431                         $this->autoSumm = md5( '' );
2432                 }
2433
2434                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2435                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2436
2437                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2438                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2439                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2440
2441                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2442                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2443
2444                 if ( $this->section == 'new' ) {
2445                         $this->showSummaryInput( true, $this->summary );
2446                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2447                 }
2448
2449                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2450
2451                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2452                         $wgOut->addHTML( EditPage::getEditToolbar() );
2453                 }
2454
2455                 if ( $this->blankArticle ) {
2456                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2457                 }
2458
2459                 if ( $this->isConflict ) {
2460                         // In an edit conflict bypass the overridable content form method
2461                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2462                         // resolved between page source edits and custom ui edits using the
2463                         // custom edit ui.
2464                         $this->textbox2 = $this->textbox1;
2465
2466                         $content = $this->getCurrentContent();
2467                         $this->textbox1 = $this->toEditText( $content );
2468
2469                         $this->showTextbox1();
2470                 } else {
2471                         $this->showContentForm();
2472                 }
2473
2474                 $wgOut->addHTML( $this->editFormTextAfterContent );
2475
2476                 $this->showStandardInputs();
2477
2478                 $this->showFormAfterText();
2479
2480                 $this->showTosSummary();
2481
2482                 $this->showEditTools();
2483
2484                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2485
2486                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2487                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2488
2489                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2490                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2491
2492                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2493                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2494
2495                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2496
2497                 if ( $this->isConflict ) {
2498                         try {
2499                                 $this->showConflict();
2500                         } catch ( MWContentSerializationException $ex ) {
2501                                 // this can't really happen, but be nice if it does.
2502                                 $msg = wfMessage(
2503                                         'content-failed-to-parse',
2504                                         $this->contentModel,
2505                                         $this->contentFormat,
2506                                         $ex->getMessage()
2507                                 );
2508                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2509                         }
2510                 }
2511
2512                 // Marker for detecting truncated form data.  This must be the last
2513                 // parameter sent in order to be of use, so do not move me.
2514                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2515                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2516
2517                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2518                         $this->displayPreviewArea( $previewOutput, false );
2519                 }
2520
2521         }
2522
2523         /**
2524          * Extract the section title from current section text, if any.
2525          *
2526          * @param string $text
2527          * @return string|bool String or false
2528          */
2529         public static function extractSectionTitle( $text ) {
2530                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2531                 if ( !empty( $matches[2] ) ) {
2532                         global $wgParser;
2533                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2534                 } else {
2535                         return false;
2536                 }
2537         }
2538
2539         /**
2540          * @return bool
2541          */
2542         protected function showHeader() {
2543                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2544                 global $wgAllowUserCss, $wgAllowUserJs;
2545
2546                 if ( $this->mTitle->isTalkPage() ) {
2547                         $wgOut->addWikiMsg( 'talkpagetext' );
2548                 }
2549
2550                 // Add edit notices
2551                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
2552                 if ( count( $editNotices ) ) {
2553                         $wgOut->addHTML( implode( "\n", $editNotices ) );
2554                 } else {
2555                         $msg = wfMessage( 'editnotice-notext' );
2556                         if ( !$msg->isDisabled() ) {
2557                                 $wgOut->addHTML(
2558                                         '<div class="mw-editnotice-notext">'
2559                                         . $msg->parseAsBlock()
2560                                         . '</div>'
2561                                 );
2562                         }
2563                 }
2564
2565                 if ( $this->isConflict ) {
2566                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2567                         $this->edittime = $this->mArticle->getTimestamp();
2568                 } else {
2569                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2570                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2571                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2572                                 // Someone is welcome to try refactoring though
2573                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2574                                 return false;
2575                         }
2576
2577                         if ( $this->section != '' && $this->section != 'new' ) {
2578                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2579                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2580                                         if ( $sectionTitle !== false ) {
2581                                                 $this->summary = "/* $sectionTitle */ ";
2582                                         }
2583                                 }
2584                         }
2585
2586                         if ( $this->missingComment ) {
2587                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2588                         }
2589
2590                         if ( $this->missingSummary && $this->section != 'new' ) {
2591                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2592                         }
2593
2594                         if ( $this->missingSummary && $this->section == 'new' ) {
2595                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2596                         }
2597
2598                         if ( $this->blankArticle ) {
2599                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2600                         }
2601
2602                         if ( $this->selfRedirect ) {
2603                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2604                         }
2605
2606                         if ( $this->hookError !== '' ) {
2607                                 $wgOut->addWikiText( $this->hookError );
2608                         }
2609
2610                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2611                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2612                         }
2613
2614                         if ( $this->section != 'new' ) {
2615                                 $revision = $this->mArticle->getRevisionFetched();
2616                                 if ( $revision ) {
2617                                         // Let sysop know that this will make private content public if saved
2618
2619                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2620                                                 $wgOut->wrapWikiMsg(
2621                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2622                                                         'rev-deleted-text-permission'
2623                                                 );
2624                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2625                                                 $wgOut->wrapWikiMsg(
2626                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2627                                                         'rev-deleted-text-view'
2628                                                 );
2629                                         }
2630
2631                                         if ( !$revision->isCurrent() ) {
2632                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2633                                                 $wgOut->addWikiMsg( 'editingold' );
2634                                         }
2635                                 } elseif ( $this->mTitle->exists() ) {
2636                                         // Something went wrong
2637
2638                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2639                                                 array( 'missing-revision', $this->oldid ) );
2640                                 }
2641                         }
2642                 }
2643
2644                 if ( wfReadOnly() ) {
2645                         $wgOut->wrapWikiMsg(
2646                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2647                                 array( 'readonlywarning', wfReadOnlyReason() )
2648                         );
2649                 } elseif ( $wgUser->isAnon() ) {
2650                         if ( $this->formtype != 'preview' ) {
2651                                 $wgOut->wrapWikiMsg(
2652                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2653                                         array( 'anoneditwarning',
2654                                                 // Log-in link
2655                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2656                                                 // Sign-up link
2657                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2658                                 );
2659                         } else {
2660                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2661                                         'anonpreviewwarning'
2662                                 );
2663                         }
2664                 } else {
2665                         if ( $this->isCssJsSubpage ) {
2666                                 # Check the skin exists
2667                                 if ( $this->isWrongCaseCssJsPage ) {
2668                                         $wgOut->wrapWikiMsg(
2669                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2670                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2671                                         );
2672                                 }
2673                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2674                                         if ( $this->formtype !== 'preview' ) {
2675                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2676                                                         $wgOut->wrapWikiMsg(
2677                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2678                                                                 array( 'usercssyoucanpreview' )
2679                                                         );
2680                                                 }
2681
2682                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
2683                                                         $wgOut->wrapWikiMsg(
2684                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2685                                                                 array( 'userjsyoucanpreview' )
2686                                                         );
2687                                                 }
2688                                         }
2689                                 }
2690                         }
2691                 }
2692
2693                 if ( $this->mTitle->isProtected( 'edit' ) &&
2694                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2695                 ) {
2696                         # Is the title semi-protected?
2697                         if ( $this->mTitle->isSemiProtected() ) {
2698                                 $noticeMsg = 'semiprotectedpagewarning';
2699                         } else {
2700                                 # Then it must be protected based on static groups (regular)
2701                                 $noticeMsg = 'protectedpagewarning';
2702                         }
2703                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2704                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2705                 }
2706                 if ( $this->mTitle->isCascadeProtected() ) {
2707                         # Is this page under cascading protection from some source pages?
2708                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2709                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2710                         $cascadeSourcesCount = count( $cascadeSources );
2711                         if ( $cascadeSourcesCount > 0 ) {
2712                                 # Explain, and list the titles responsible
2713                                 foreach ( $cascadeSources as $page ) {
2714                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2715                                 }
2716                         }
2717                         $notice .= '</div>';
2718                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2719                 }
2720                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2721                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2722                                 array( 'lim' => 1,
2723                                         'showIfEmpty' => false,
2724                                         'msgKey' => array( 'titleprotectedwarning' ),
2725                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2726                 }
2727
2728                 if ( $this->kblength === false ) {
2729                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2730                 }
2731
2732                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2733                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2734                                 array(
2735                                         'longpageerror',
2736                                         $wgLang->formatNum( $this->kblength ),
2737                                         $wgLang->formatNum( $wgMaxArticleSize )
2738                                 )
2739                         );
2740                 } else {
2741                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2742                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2743                                         array(
2744                                                 'longpage-hint',
2745                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2746                                                 strlen( $this->textbox1 )
2747                                         )
2748                                 );
2749                         }
2750                 }
2751                 # Add header copyright warning
2752                 $this->showHeaderCopyrightWarning();
2753
2754                 return true;
2755         }
2756
2757         /**
2758          * Standard summary input and label (wgSummary), abstracted so EditPage
2759          * subclasses may reorganize the form.
2760          * Note that you do not need to worry about the label's for=, it will be
2761          * inferred by the id given to the input. You can remove them both by
2762          * passing array( 'id' => false ) to $userInputAttrs.
2763          *
2764          * @param string $summary The value of the summary input
2765          * @param string $labelText The html to place inside the label
2766          * @param array $inputAttrs Array of attrs to use on the input
2767          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2768          *
2769          * @return array An array in the format array( $label, $input )
2770          */
2771         function getSummaryInput( $summary = "", $labelText = null,
2772                 $inputAttrs = null, $spanLabelAttrs = null
2773         ) {
2774                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2775                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2776                         'id' => 'wpSummary',
2777                         'maxlength' => '200',
2778                         'tabindex' => '1',
2779                         'size' => 60,
2780                         'spellcheck' => 'true',
2781                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2782
2783                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2784                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2785                         'id' => "wpSummaryLabel"
2786                 );
2787
2788                 $label = null;
2789                 if ( $labelText ) {
2790                         $label = Xml::tags(
2791                                 'label',
2792                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2793                                 $labelText
2794                         );
2795                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2796                 }
2797
2798                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2799
2800                 return array( $label, $input );
2801         }
2802
2803         /**
2804          * @param bool $isSubjectPreview True if this is the section subject/title
2805          *   up top, or false if this is the comment summary
2806          *   down below the textarea
2807          * @param string $summary The text of the summary to display
2808          */
2809         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2810                 global $wgOut, $wgContLang;
2811                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2812                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2813                 if ( $isSubjectPreview ) {
2814                         if ( $this->nosummary ) {
2815                                 return;
2816                         }
2817                 } else {
2818                         if ( !$this->mShowSummaryField ) {
2819                                 return;
2820                         }
2821                 }
2822                 $summary = $wgContLang->recodeForEdit( $summary );
2823                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2824                 list( $label, $input ) = $this->getSummaryInput(
2825                         $summary,
2826                         $labelText,
2827                         array( 'class' => $summaryClass ),
2828                         array()
2829                 );
2830                 $wgOut->addHTML( "{$label} {$input}" );
2831         }
2832
2833         /**
2834          * @param bool $isSubjectPreview True if this is the section subject/title
2835          *   up top, or false if this is the comment summary
2836          *   down below the textarea
2837          * @param string $summary The text of the summary to display
2838          * @return string
2839          */
2840         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2841                 // avoid spaces in preview, gets always trimmed on save
2842                 $summary = trim( $summary );
2843                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2844                         return "";
2845                 }
2846
2847                 global $wgParser;
2848
2849                 if ( $isSubjectPreview ) {
2850                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2851                                 ->inContentLanguage()->text();
2852                 }
2853
2854                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2855
2856                 $summary = wfMessage( $message )->parse()
2857                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2858                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2859         }
2860
2861         protected function showFormBeforeText() {
2862                 global $wgOut;
2863                 $section = htmlspecialchars( $this->section );
2864                 $wgOut->addHTML( <<<HTML
2865 <input type='hidden' value="{$section}" name="wpSection"/>
2866 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2867 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2868 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2869
2870 HTML
2871                 );
2872                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2873                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2874                 }
2875         }
2876
2877         protected function showFormAfterText() {
2878                 global $wgOut, $wgUser;
2879                 /**
2880                  * To make it harder for someone to slip a user a page
2881                  * which submits an edit form to the wiki without their
2882                  * knowledge, a random token is associated with the login
2883                  * session. If it's not passed back with the submission,
2884                  * we won't save the page, or render user JavaScript and
2885                  * CSS previews.
2886                  *
2887                  * For anon editors, who may not have a session, we just
2888                  * include the constant suffix to prevent editing from
2889                  * broken text-mangling proxies.
2890                  */
2891                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2892         }
2893
2894         /**
2895          * Subpage overridable method for printing the form for page content editing
2896          * By default this simply outputs wpTextbox1
2897          * Subclasses can override this to provide a custom UI for editing;
2898          * be it a form, or simply wpTextbox1 with a modified content that will be
2899          * reverse modified when extracted from the post data.
2900          * Note that this is basically the inverse for importContentFormData
2901          */
2902         protected function showContentForm() {
2903                 $this->showTextbox1();
2904         }
2905
2906         /**
2907          * Method to output wpTextbox1
2908          * The $textoverride method can be used by subclasses overriding showContentForm
2909          * to pass back to this method.
2910          *
2911          * @param array $customAttribs Array of html attributes to use in the textarea
2912          * @param string $textoverride Optional text to override $this->textarea1 with
2913          */
2914         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2915                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2916                         $attribs = array( 'style' => 'display:none;' );
2917                 } else {
2918                         $classes = array(); // Textarea CSS
2919                         if ( $this->mTitle->isProtected( 'edit' ) &&
2920                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2921                         ) {
2922                                 # Is the title semi-protected?
2923                                 if ( $this->mTitle->isSemiProtected() ) {
2924                                         $classes[] = 'mw-textarea-sprotected';
2925                                 } else {
2926                                         # Then it must be protected based on static groups (regular)
2927                                         $classes[] = 'mw-textarea-protected';
2928                                 }
2929                                 # Is the title cascade-protected?
2930                                 if ( $this->mTitle->isCascadeProtected() ) {
2931                                         $classes[] = 'mw-textarea-cprotected';
2932                                 }
2933                         }
2934
2935                         $attribs = array( 'tabindex' => 1 );
2936
2937                         if ( is_array( $customAttribs ) ) {
2938                                 $attribs += $customAttribs;
2939                         }
2940
2941                         if ( count( $classes ) ) {
2942                                 if ( isset( $attribs['class'] ) ) {
2943                                         $classes[] = $attribs['class'];
2944                                 }
2945                                 $attribs['class'] = implode( ' ', $classes );
2946                         }
2947                 }
2948
2949                 $this->showTextbox(
2950                         $textoverride !== null ? $textoverride : $this->textbox1,
2951                         'wpTextbox1',
2952                         $attribs
2953                 );
2954         }
2955
2956         protected function showTextbox2() {
2957                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2958         }
2959
2960         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2961                 global $wgOut, $wgUser;
2962
2963                 $wikitext = $this->safeUnicodeOutput( $text );
2964                 if ( strval( $wikitext ) !== '' ) {
2965                         // Ensure there's a newline at the end, otherwise adding lines
2966                         // is awkward.
2967                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2968                         // mode will show an extra newline. A bit annoying.
2969                         $wikitext .= "\n";
2970                 }
2971
2972                 $attribs = $customAttribs + array(
2973                         'accesskey' => ',',
2974                         'id' => $name,
2975                         'cols' => $wgUser->getIntOption( 'cols' ),
2976                         'rows' => $wgUser->getIntOption( 'rows' ),
2977                         // Avoid PHP notices when appending preferences
2978                         // (appending allows customAttribs['style'] to still work).
2979                         'style' => ''
2980                 );
2981
2982                 $pageLang = $this->mTitle->getPageLanguage();
2983                 $attribs['lang'] = $pageLang->getHtmlCode();
2984                 $attribs['dir'] = $pageLang->getDir();
2985
2986                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2987         }
2988
2989         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2990                 global $wgOut;
2991                 $classes = array();
2992                 if ( $isOnTop ) {
2993                         $classes[] = 'ontop';
2994                 }
2995
2996                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2997
2998                 if ( $this->formtype != 'preview' ) {
2999                         $attribs['style'] = 'display: none;';
3000                 }
3001
3002                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3003
3004                 if ( $this->formtype == 'preview' ) {
3005                         $this->showPreview( $previewOutput );
3006                 } else {
3007                         // Empty content container for LivePreview
3008                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3009                         $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3010                                 'class' => 'mw-content-' . $pageViewLang->getDir() );
3011                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3012                 }
3013
3014                 $wgOut->addHTML( '</div>' );
3015
3016                 if ( $this->formtype == 'diff' ) {
3017                         try {
3018                                 $this->showDiff();
3019                         } catch ( MWContentSerializationException $ex ) {
3020                                 $msg = wfMessage(
3021                                         'content-failed-to-parse',
3022                                         $this->contentModel,
3023                                         $this->contentFormat,
3024                                         $ex->getMessage()
3025                                 );
3026                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3027                         }
3028                 }
3029         }
3030
3031         /**
3032          * Append preview output to $wgOut.
3033          * Includes category rendering if this is a category page.
3034          *
3035          * @param string $text The HTML to be output for the preview.
3036          */
3037         protected function showPreview( $text ) {
3038                 global $wgOut;
3039                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3040                         $this->mArticle->openShowCategory();
3041                 }
3042                 # This hook seems slightly odd here, but makes things more
3043                 # consistent for extensions.
3044                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3045                 $wgOut->addHTML( $text );
3046                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3047                         $this->mArticle->closeShowCategory();
3048                 }
3049         }
3050
3051         /**
3052          * Get a diff between the current contents of the edit box and the
3053          * version of the page we're editing from.
3054          *
3055          * If this is a section edit, we'll replace the section as for final
3056          * save and then make a comparison.
3057          */
3058         function showDiff() {
3059                 global $wgUser, $wgContLang, $wgOut;
3060
3061                 $oldtitlemsg = 'currentrev';
3062                 # if message does not exist, show diff against the preloaded default
3063                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3064                         $oldtext = $this->mTitle->getDefaultMessageText();
3065                         if ( $oldtext !== false ) {
3066                                 $oldtitlemsg = 'defaultmessagetext';
3067                                 $oldContent = $this->toEditContent( $oldtext );
3068                         } else {
3069                                 $oldContent = null;
3070                         }
3071                 } else {
3072                         $oldContent = $this->getCurrentContent();
3073                 }
3074
3075                 $textboxContent = $this->toEditContent( $this->textbox1 );
3076
3077                 $newContent = $this->mArticle->replaceSectionContent(
3078                                                         $this->section, $textboxContent,
3079                                                         $this->summary, $this->edittime );
3080
3081                 if ( $newContent ) {
3082                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3083                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3084
3085                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3086                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3087                 }
3088
3089                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3090                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3091                         $newtitle = wfMessage( 'yourtext' )->parse();
3092
3093                         if ( !$oldContent ) {
3094                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3095                         }
3096
3097                         if ( !$newContent ) {
3098                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3099                         }
3100
3101                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3102                         $de->setContent( $oldContent, $newContent );
3103
3104                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3105                         $de->showDiffStyle();
3106                 } else {
3107                         $difftext = '';
3108                 }
3109
3110                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3111         }
3112
3113         /**
3114          * Show the header copyright warning.
3115          */
3116         protected function showHeaderCopyrightWarning() {
3117                 $msg = 'editpage-head-copy-warn';
3118                 if ( !wfMessage( $msg )->isDisabled() ) {
3119                         global $wgOut;
3120                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3121                                 'editpage-head-copy-warn' );
3122                 }
3123         }
3124
3125         /**
3126          * Give a chance for site and per-namespace customizations of
3127          * terms of service summary link that might exist separately
3128          * from the copyright notice.
3129          *
3130          * This will display between the save button and the edit tools,
3131          * so should remain short!
3132          */
3133         protected function showTosSummary() {
3134                 $msg = 'editpage-tos-summary';
3135                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3136                 if ( !wfMessage( $msg )->isDisabled() ) {
3137                         global $wgOut;
3138                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3139                         $wgOut->addWikiMsg( $msg );
3140                         $wgOut->addHTML( '</div>' );
3141                 }
3142         }
3143
3144         protected function showEditTools() {
3145                 global $wgOut;
3146                 $wgOut->addHTML( '<div class="mw-editTools">' .
3147                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3148                         '</div>' );
3149         }
3150
3151         /**
3152          * Get the copyright warning
3153          *
3154          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3155          * @return string
3156          */
3157         protected function getCopywarn() {
3158                 return self::getCopyrightWarning( $this->mTitle );
3159         }
3160
3161         /**
3162          * Get the copyright warning, by default returns wikitext
3163          *
3164          * @param Title $title
3165          * @param string $format Output format, valid values are any function of a Message object
3166          * @return string
3167          */
3168         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3169                 global $wgRightsText;
3170                 if ( $wgRightsText ) {
3171                         $copywarnMsg = array( 'copyrightwarning',
3172                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3173                                 $wgRightsText );
3174                 } else {
3175                         $copywarnMsg = array( 'copyrightwarning2',
3176                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3177                 }
3178                 // Allow for site and per-namespace customization of contribution/copyright notice.
3179                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3180
3181                 return "<div id=\"editpage-copywarn\">\n" .
3182                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3183         }
3184
3185         /**
3186          * Get the Limit report for page previews
3187          *
3188          * @since 1.22
3189          * @param ParserOutput $output ParserOutput object from the parse
3190          * @return string HTML
3191          */
3192         public static function getPreviewLimitReport( $output ) {
3193                 if ( !$output || !$output->getLimitReportData() ) {
3194                         return '';
3195                 }
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 ( Hooks::run( '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                 return $limitReport;
3232         }
3233
3234         protected function showStandardInputs( &$tabindex = 2 ) {
3235                 global $wgOut;
3236                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3237
3238                 if ( $this->section != 'new' ) {
3239                         $this->showSummaryInput( false, $this->summary );
3240                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3241                 }
3242
3243                 $checkboxes = $this->getCheckboxes( $tabindex,
3244                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3245                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3246
3247                 // Show copyright warning.
3248                 $wgOut->addWikiText( $this->getCopywarn() );
3249                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3250
3251                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3252                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3253
3254                 $cancel = $this->getCancelLink();
3255                 if ( $cancel !== '' ) {
3256                         $cancel .= Html::element( 'span',
3257                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3258                                 wfMessage( 'pipe-separator' )->text() );
3259                 }
3260
3261                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3262                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3263                 $attrs = array(
3264                         'target' => 'helpwindow',
3265                         'href' => $edithelpurl,
3266                 );
3267                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3268                         $attrs, array( 'mw-ui-quiet' ) ) .
3269                         wfMessage( 'word-separator' )->escaped() .
3270                         wfMessage( 'newwindow' )->parse();
3271
3272                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3273                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3274                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3275
3276                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3277
3278                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3279         }
3280
3281         /**
3282          * Show an edit conflict. textbox1 is already shown in showEditForm().
3283          * If you want to use another entry point to this function, be careful.
3284          */
3285         protected function showConflict() {
3286                 global $wgOut;
3287
3288                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3289                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3290
3291                         $content1 = $this->toEditContent( $this->textbox1 );
3292                         $content2 = $this->toEditContent( $this->textbox2 );
3293
3294                         $handler = ContentHandler::getForModelID( $this->contentModel );
3295                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3296                         $de->setContent( $content2, $content1 );
3297                         $de->showDiff(
3298                                 wfMessage( 'yourtext' )->parse(),
3299                                 wfMessage( 'storedversion' )->text()
3300                         );
3301
3302                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3303                         $this->showTextbox2();
3304                 }
3305         }
3306
3307         /**
3308          * @return string
3309          */
3310         public function getCancelLink() {
3311                 $cancelParams = array();
3312                 if ( !$this->isConflict && $this->oldid > 0 ) {
3313                         $cancelParams['oldid'] = $this->oldid;
3314                 }
3315                 $attrs = array( 'id' => 'mw-editform-cancel' );
3316
3317                 return Linker::linkKnown(
3318                         $this->getContextTitle(),
3319                         wfMessage( 'cancel' )->parse(),
3320                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3321                         $cancelParams
3322                 );
3323         }
3324
3325         /**
3326          * Returns the URL to use in the form's action attribute.
3327          * This is used by EditPage subclasses when simply customizing the action
3328          * variable in the constructor is not enough. This can be used when the
3329          * EditPage lives inside of a Special page rather than a custom page action.
3330          *
3331          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3332          * @return string
3333          */
3334         protected function getActionURL( Title $title ) {
3335                 return $title->getLocalURL( array( 'action' => $this->action ) );
3336         }
3337
3338         /**
3339          * Check if a page was deleted while the user was editing it, before submit.
3340          * Note that we rely on the logging table, which hasn't been always there,
3341          * but that doesn't matter, because this only applies to brand new
3342          * deletes.
3343          * @return bool
3344          */
3345         protected function wasDeletedSinceLastEdit() {
3346                 if ( $this->deletedSinceEdit !== null ) {
3347                         return $this->deletedSinceEdit;
3348                 }
3349
3350                 $this->deletedSinceEdit = false;
3351
3352                 if ( $this->mTitle->isDeletedQuick() ) {
3353                         $this->lastDelete = $this->getLastDelete();
3354                         if ( $this->lastDelete ) {
3355                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3356                                 if ( $deleteTime > $this->starttime ) {
3357                                         $this->deletedSinceEdit = true;
3358                                 }
3359                         }
3360                 }
3361
3362                 return $this->deletedSinceEdit;
3363         }
3364
3365         /**
3366          * @return bool|stdClass
3367          */
3368         protected function getLastDelete() {
3369                 $dbr = wfGetDB( DB_SLAVE );
3370                 $data = $dbr->selectRow(
3371                         array( 'logging', 'user' ),
3372                         array(
3373                                 'log_type',
3374                                 'log_action',
3375                                 'log_timestamp',
3376                                 'log_user',
3377                                 'log_namespace',
3378                                 'log_title',
3379                                 'log_comment',
3380                                 'log_params',
3381                                 'log_deleted',
3382                                 'user_name'
3383                         ), array(
3384                                 'log_namespace' => $this->mTitle->getNamespace(),
3385                                 'log_title' => $this->mTitle->getDBkey(),
3386                                 'log_type' => 'delete',
3387                                 'log_action' => 'delete',
3388                                 'user_id=log_user'
3389                         ),
3390                         __METHOD__,
3391                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3392                 );
3393                 // Quick paranoid permission checks...
3394                 if ( is_object( $data ) ) {
3395                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3396                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3397                         }
3398
3399                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3400                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3401                         }
3402                 }
3403
3404                 return $data;
3405         }
3406
3407         /**
3408          * Get the rendered text for previewing.
3409          * @throws MWException
3410          * @return string
3411          */
3412         function getPreviewText() {
3413                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3414                 global $wgAllowUserCss, $wgAllowUserJs;
3415
3416                 if ( $wgRawHtml && !$this->mTokenOk ) {
3417                         // Could be an offsite preview attempt. This is very unsafe if
3418                         // HTML is enabled, as it could be an attack.
3419                         $parsedNote = '';
3420                         if ( $this->textbox1 !== '' ) {
3421                                 // Do not put big scary notice, if previewing the empty
3422                                 // string, which happens when you initially edit
3423                                 // a category page, due to automatic preview-on-open.
3424                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3425                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3426                         }
3427                         return $parsedNote;
3428                 }
3429
3430                 $note = '';
3431
3432                 try {
3433                         $content = $this->toEditContent( $this->textbox1 );
3434
3435                         $previewHTML = '';
3436                         if ( !Hooks::run(
3437                                 'AlternateEditPreview',
3438                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3439                         ) {
3440                                 return $previewHTML;
3441                         }
3442
3443                         # provide a anchor link to the editform
3444                         $continueEditing = '<span class="mw-continue-editing">' .
3445                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3446                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3447                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3448                                 if ( $this->mTokenOkExceptSuffix ) {
3449                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3450                                 } else {
3451                                         $note = wfMessage( 'session_fail_preview' )->plain();
3452                                 }
3453                         } elseif ( $this->incompleteForm ) {
3454                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3455                         } else {
3456                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3457                         }
3458
3459                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3460                         $parserOptions->setIsPreview( true );
3461                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3462
3463                         # don't parse non-wikitext pages, show message about preview
3464                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3465                                 if ( $this->mTitle->isCssJsSubpage() ) {
3466                                         $level = 'user';
3467                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3468                                         $level = 'site';
3469                                 } else {
3470                                         $level = false;
3471                                 }
3472
3473                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3474                                         $format = 'css';
3475                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3476                                                 $format = false;
3477                                         }
3478                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3479                                         $format = 'js';
3480                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3481                                                 $format = false;
3482                                         }
3483                                 } else {
3484                                         $format = false;
3485                                 }
3486
3487                                 # Used messages to make sure grep find them:
3488                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3489                                 if ( $level && $format ) {
3490                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3491                                                 wfMessage( "{$level}{$format}preview" )->text() .
3492                                                 ' ' . $continueEditing . "</div>";
3493                                 }
3494                         }
3495
3496                         # If we're adding a comment, we need to show the
3497                         # summary as the headline
3498                         if ( $this->section === "new" && $this->summary !== "" ) {
3499                                 $content = $content->addSectionHeader( $this->summary );
3500                         }
3501
3502                         $hook_args = array( $this, &$content );
3503                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3504                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3505
3506                         $parserOptions->enableLimitReport();
3507
3508                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3509                         # But it's now deprecated, so never mind
3510
3511                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3512                         $scopedCallback = $parserOptions->setupFakeRevision(
3513                                 $this->mTitle, $pstContent, $wgUser );
3514                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3515
3516                         # Try to stash the edit for the final submission step
3517                         # @todo: different date format preferences cause cache misses
3518                         ApiStashEdit::stashEditFromPreview(
3519                                 $this->getArticle(), $content, $pstContent,
3520                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3521                         );
3522
3523                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3524                         $previewHTML = $parserOutput->getText();
3525                         $this->mParserOutput = $parserOutput;
3526                         $wgOut->addParserOutputMetadata( $parserOutput );
3527
3528                         if ( count( $parserOutput->getWarnings() ) ) {
3529                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3530                         }
3531                 } catch ( MWContentSerializationException $ex ) {
3532                         $m = wfMessage(
3533                                 'content-failed-to-parse',
3534                                 $this->contentModel,
3535                                 $this->contentFormat,
3536                                 $ex->getMessage()
3537                         );
3538                         $note .= "\n\n" . $m->parse();
3539                         $previewHTML = '';
3540                 }
3541
3542                 if ( $this->isConflict ) {
3543                         $conflict = '<h2 id="mw-previewconflict">'
3544                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3545                 } else {
3546                         $conflict = '<hr />';
3547                 }
3548
3549                 $previewhead = "<div class='previewnote'>\n" .
3550                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3551                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3552
3553                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3554                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3555                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3556                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3557
3558                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3559         }
3560
3561         /**
3562          * @return array
3563          */
3564         function getTemplates() {
3565                 if ( $this->preview || $this->section != '' ) {
3566                         $templates = array();
3567                         if ( !isset( $this->mParserOutput ) ) {
3568                                 return $templates;
3569                         }
3570                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3571                                 foreach ( array_keys( $template ) as $dbk ) {
3572                                         $templates[] = Title::makeTitle( $ns, $dbk );
3573                                 }
3574                         }
3575                         return $templates;
3576                 } else {
3577                         return $this->mTitle->getTemplateLinksFrom();
3578                 }
3579         }
3580
3581         /**
3582          * Shows a bulletin board style toolbar for common editing functions.
3583          * It can be disabled in the user preferences.
3584          *
3585          * @return string
3586          */
3587         static function getEditToolbar() {
3588                 global $wgContLang, $wgOut;
3589                 global $wgEnableUploads, $wgForeignFileRepos;
3590
3591                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3592
3593                 /**
3594                  * $toolarray is an array of arrays each of which includes the
3595                  * opening tag, the closing tag, optionally a sample text that is
3596                  * inserted between the two when no selection is highlighted
3597                  * and.  The tip text is shown when the user moves the mouse
3598                  * over the button.
3599                  *
3600                  * Images are defined in ResourceLoaderEditToolbarModule.
3601                  */
3602                 $toolarray = array(
3603                         array(
3604                                 'id'     => 'mw-editbutton-bold',
3605                                 'open'   => '\'\'\'',
3606                                 'close'  => '\'\'\'',
3607                                 'sample' => wfMessage( 'bold_sample' )->text(),
3608                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3609                         ),
3610                         array(
3611                                 'id'     => 'mw-editbutton-italic',
3612                                 'open'   => '\'\'',
3613                                 'close'  => '\'\'',
3614                                 'sample' => wfMessage( 'italic_sample' )->text(),
3615                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3616                         ),
3617                         array(
3618                                 'id'     => 'mw-editbutton-link',
3619                                 'open'   => '[[',
3620                                 'close'  => ']]',
3621                                 'sample' => wfMessage( 'link_sample' )->text(),
3622                                 'tip'    => wfMessage( 'link_tip' )->text(),
3623                         ),
3624                         array(
3625                                 'id'     => 'mw-editbutton-extlink',
3626                                 'open'   => '[',
3627                                 'close'  => ']',
3628                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3629                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3630                         ),
3631                         array(
3632                                 'id'     => 'mw-editbutton-headline',
3633                                 'open'   => "\n== ",
3634                                 'close'  => " ==\n",
3635                                 'sample' => wfMessage( 'headline_sample' )->text(),
3636                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3637                         ),
3638                         $imagesAvailable ? array(
3639                                 'id'     => 'mw-editbutton-image',
3640                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3641                                 'close'  => ']]',
3642                                 'sample' => wfMessage( 'image_sample' )->text(),
3643                                 'tip'    => wfMessage( 'image_tip' )->text(),
3644                         ) : false,
3645                         $imagesAvailable ? array(
3646                                 'id'     => 'mw-editbutton-media',
3647                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3648                                 'close'  => ']]',
3649                                 'sample' => wfMessage( 'media_sample' )->text(),
3650                                 'tip'    => wfMessage( 'media_tip' )->text(),
3651                         ) : false,
3652                         array(
3653                                 'id'     => 'mw-editbutton-nowiki',
3654                                 'open'   => "<nowiki>",
3655                                 'close'  => "</nowiki>",
3656                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3657                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3658                         ),
3659                         array(
3660                                 'id'     => 'mw-editbutton-signature',
3661                                 'open'   => '--~~~~',
3662                                 'close'  => '',
3663                                 'sample' => '',
3664                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3665                         ),
3666                         array(
3667                                 'id'     => 'mw-editbutton-hr',
3668                                 'open'   => "\n----\n",
3669                                 'close'  => '',
3670                                 'sample' => '',
3671                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3672                         )
3673                 );
3674
3675                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3676                 foreach ( $toolarray as $tool ) {
3677                         if ( !$tool ) {
3678                                 continue;
3679                         }
3680
3681                         $params = array(
3682                                 // Images are defined in ResourceLoaderEditToolbarModule
3683                                 false,
3684                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3685                                 // Older browsers show a "speedtip" type message only for ALT.
3686                                 // Ideally these should be different, realistically they
3687                                 // probably don't need to be.
3688                                 $tool['tip'],
3689                                 $tool['open'],
3690                                 $tool['close'],
3691                                 $tool['sample'],
3692                                 $tool['id'],
3693                         );
3694
3695                         $script .= Xml::encodeJsCall(
3696                                 'mw.toolbar.addButton',
3697                                 $params,
3698                                 ResourceLoader::inDebugMode()
3699                         );
3700                 }
3701
3702                 $script .= '});';
3703                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3704
3705                 $toolbar = '<div id="toolbar"></div>';
3706
3707                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3708
3709                 return $toolbar;
3710         }
3711
3712         /**
3713          * Returns an array of html code of the following checkboxes:
3714          * minor and watch
3715          *
3716          * @param int $tabindex Current tabindex
3717          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3718          *                 status of the checkbox
3719          *
3720          * @return array
3721          */
3722         public function getCheckboxes( &$tabindex, $checked ) {
3723                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3724
3725                 $checkboxes = array();
3726
3727                 // don't show the minor edit checkbox if it's a new page or section
3728                 if ( !$this->isNew ) {
3729                         $checkboxes['minor'] = '';
3730                         $minorLabel = wfMessage( 'minoredit' )->parse();
3731                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3732                                 $attribs = array(
3733                                         'tabindex' => ++$tabindex,
3734                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3735                                         'id' => 'wpMinoredit',
3736                                 );
3737                                 $minorEditHtml =
3738                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3739                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3740                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3741                                         ">{$minorLabel}</label>";
3742
3743                                 if ( $wgUseMediaWikiUIEverywhere ) {
3744                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3745                                                 $minorEditHtml .
3746                                         Html::closeElement( 'div' );
3747                                 } else {
3748                                         $checkboxes['minor'] = $minorEditHtml;
3749                                 }
3750                         }
3751                 }
3752
3753                 $watchLabel = wfMessage( 'watchthis' )->parse();
3754                 $checkboxes['watch'] = '';
3755                 if ( $wgUser->isLoggedIn() ) {
3756                         $attribs = array(
3757                                 'tabindex' => ++$tabindex,
3758                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3759                                 'id' => 'wpWatchthis',
3760                         );
3761                         $watchThisHtml =
3762                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3763                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3764                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3765                                 ">{$watchLabel}</label>";
3766                         if ( $wgUseMediaWikiUIEverywhere ) {
3767                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3768                                         $watchThisHtml .
3769                                         Html::closeElement( 'div' );
3770                         } else {
3771                                 $checkboxes['watch'] = $watchThisHtml;
3772                         }
3773                 }
3774                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3775                 return $checkboxes;
3776         }
3777
3778         /**
3779          * Returns an array of html code of the following buttons:
3780          * save, diff, preview and live
3781          *
3782          * @param int $tabindex Current tabindex
3783          *
3784          * @return array
3785          */
3786         public function getEditButtons( &$tabindex ) {
3787                 $buttons = array();
3788
3789                 $attribs = array(
3790                         'id' => 'wpSave',
3791                         'name' => 'wpSave',
3792                         'tabindex' => ++$tabindex,
3793                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3794                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3795                         $attribs, array( 'mw-ui-constructive' ) );
3796
3797                 ++$tabindex; // use the same for preview and live preview
3798                 $attribs = array(
3799                         'id' => 'wpPreview',
3800                         'name' => 'wpPreview',
3801                         'tabindex' => $tabindex,
3802                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3803                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3804                         $attribs );
3805                 $buttons['live'] = '';
3806
3807                 $attribs = array(
3808                         'id' => 'wpDiff',
3809                         'name' => 'wpDiff',
3810                         'tabindex' => ++$tabindex,
3811                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3812                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3813                         $attribs );
3814
3815                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3816                 return $buttons;
3817         }
3818
3819         /**
3820          * Creates a basic error page which informs the user that
3821          * they have attempted to edit a nonexistent section.
3822          */
3823         function noSuchSectionPage() {
3824                 global $wgOut;
3825
3826                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3827
3828                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3829                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3830                 $wgOut->addHTML( $res );
3831
3832                 $wgOut->returnToMain( false, $this->mTitle );
3833         }
3834
3835         /**
3836          * Show "your edit contains spam" page with your diff and text
3837          *
3838          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3839          */
3840         public function spamPageWithContent( $match = false ) {
3841                 global $wgOut, $wgLang;
3842                 $this->textbox2 = $this->textbox1;
3843
3844                 if ( is_array( $match ) ) {
3845                         $match = $wgLang->listToText( $match );
3846                 }
3847                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3848
3849                 $wgOut->addHTML( '<div id="spamprotected">' );
3850                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3851                 if ( $match ) {
3852                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3853                 }
3854                 $wgOut->addHTML( '</div>' );
3855
3856                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3857                 $this->showDiff();
3858
3859                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3860                 $this->showTextbox2();
3861
3862                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3863         }
3864
3865         /**
3866          * Check if the browser is on a blacklist of user-agents known to
3867          * mangle UTF-8 data on form submission. Returns true if Unicode
3868          * should make it through, false if it's known to be a problem.
3869          * @return bool
3870          */
3871         private function checkUnicodeCompliantBrowser() {
3872                 global $wgBrowserBlackList, $wgRequest;
3873
3874                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3875                 if ( $currentbrowser === false ) {
3876                         // No User-Agent header sent? Trust it by default...
3877                         return true;
3878                 }
3879
3880                 foreach ( $wgBrowserBlackList as $browser ) {
3881                         if ( preg_match( $browser, $currentbrowser ) ) {
3882                                 return false;
3883                         }
3884                 }
3885                 return true;
3886         }
3887
3888         /**
3889          * Filter an input field through a Unicode de-armoring process if it
3890          * came from an old browser with known broken Unicode editing issues.
3891          *
3892          * @param WebRequest $request
3893          * @param string $field
3894          * @return string
3895          */
3896         protected function safeUnicodeInput( $request, $field ) {
3897                 $text = rtrim( $request->getText( $field ) );
3898                 return $request->getBool( 'safemode' )
3899                         ? $this->unmakeSafe( $text )
3900                         : $text;
3901         }
3902
3903         /**
3904          * Filter an output field through a Unicode armoring process if it is
3905          * going to an old browser with known broken Unicode editing issues.
3906          *
3907          * @param string $text
3908          * @return string
3909          */
3910         protected function safeUnicodeOutput( $text ) {
3911                 global $wgContLang;
3912                 $codedText = $wgContLang->recodeForEdit( $text );
3913                 return $this->checkUnicodeCompliantBrowser()
3914                         ? $codedText
3915                         : $this->makeSafe( $codedText );
3916         }
3917
3918         /**
3919          * A number of web browsers are known to corrupt non-ASCII characters
3920          * in a UTF-8 text editing environment. To protect against this,
3921          * detected browsers will be served an armored version of the text,
3922          * with non-ASCII chars converted to numeric HTML character references.
3923          *
3924          * Preexisting such character references will have a 0 added to them
3925          * to ensure that round-trips do not alter the original data.
3926          *
3927          * @param string $invalue
3928          * @return string
3929          */
3930         private function makeSafe( $invalue ) {
3931                 // Armor existing references for reversibility.
3932                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3933
3934                 $bytesleft = 0;
3935                 $result = "";
3936                 $working = 0;
3937                 $valueLength = strlen( $invalue );
3938                 for ( $i = 0; $i < $valueLength; $i++ ) {
3939                         $bytevalue = ord( $invalue[$i] );
3940                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3941                                 $result .= chr( $bytevalue );
3942                                 $bytesleft = 0;
3943                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3944                                 $working = $working << 6;
3945                                 $working += ( $bytevalue & 0x3F );
3946                                 $bytesleft--;
3947                                 if ( $bytesleft <= 0 ) {
3948                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3949                                 }
3950                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3951                                 $working = $bytevalue & 0x1F;
3952                                 $bytesleft = 1;
3953                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3954                                 $working = $bytevalue & 0x0F;
3955                                 $bytesleft = 2;
3956                         } else { // 1111 0xxx
3957                                 $working = $bytevalue & 0x07;
3958                                 $bytesleft = 3;
3959                         }
3960                 }
3961                 return $result;
3962         }
3963
3964         /**
3965          * Reverse the previously applied transliteration of non-ASCII characters
3966          * back to UTF-8. Used to protect data from corruption by broken web browsers
3967          * as listed in $wgBrowserBlackList.
3968          *
3969          * @param string $invalue
3970          * @return string
3971          */
3972         private function unmakeSafe( $invalue ) {
3973                 $result = "";
3974                 $valueLength = strlen( $invalue );
3975                 for ( $i = 0; $i < $valueLength; $i++ ) {
3976                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3977                                 $i += 3;
3978                                 $hexstring = "";
3979                                 do {
3980                                         $hexstring .= $invalue[$i];
3981                                         $i++;
3982                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3983
3984                                 // Do some sanity checks. These aren't needed for reversibility,
3985                                 // but should help keep the breakage down if the editor
3986                                 // breaks one of the entities whilst editing.
3987                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
3988                                         $codepoint = hexdec( $hexstring );
3989                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
3990                                 } else {
3991                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3992                                 }
3993                         } else {
3994                                 $result .= substr( $invalue, $i, 1 );
3995                         }
3996                 }
3997                 // reverse the transform that we made for reversibility reasons.
3998                 return strtr( $result, array( "&#x0" => "&#x" ) );
3999         }
4000 }