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: an error relating to change tagging. Look at the message key for
 161          * more details
 162          */
 163         const AS_CHANGE_TAG_ERROR = 237;
 164
 165         /**
 166          * Status: can't parse content
 167          */
 168         const AS_PARSE_ERROR = 240;
 169
 170         /**
 171          * Status: when changing the content model is disallowed due to
 172          * $wgContentHandlerUseDB being false
 173          */
 174         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 175
 176         /**
 177          * HTML id and name for the beginning of the edit form.
 178          */
 179         const EDITFORM_ID = 'editform';
 180
 181         /**
 182          * Prefix of key for cookie used to pass post-edit state.
 183          * The revision id edited is added after this
 184          */
 185         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 186
 187         /**
 188          * Duration of PostEdit cookie, in seconds.
 189          * The cookie will be removed instantly if the JavaScript runs.
 190          *
 191          * Otherwise, though, we don't want the cookies to accumulate.
 192          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 193          * limit of only 20 cookies per domain. This still applies at least to some
 194          * versions of IE without full updates:
 195          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 196          *
 197          * A value of 20 minutes should be enough to take into account slow loads and minor
 198          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 199          */
 200         const POST_EDIT_COOKIE_DURATION = 1200;
 201
 202         /** @var Article */
 203         public $mArticle;
 204
 205         /** @var Title */
 206         public $mTitle;
 207
 208         /** @var null|Title */
 209         private $mContextTitle = null;
 210
 211         /** @var string */
 212         public $action = 'submit';
 213
 214         /** @var bool */
 215         public $isConflict = false;
 216
 217         /** @var bool */
 218         public $isCssJsSubpage = false;
 219
 220         /** @var bool */
 221         public $isCssSubpage = false;
 222
 223         /** @var bool */
 224         public $isJsSubpage = false;
 225
 226         /** @var bool */
 227         public $isWrongCaseCssJsPage = false;
 228
 229         /** @var bool New page or new section */
 230         public $isNew = false;
 231
 232         /** @var bool */
 233         public $deletedSinceEdit;
 234
 235         /** @var string */
 236         public $formtype;
 237
 238         /** @var bool */
 239         public $firsttime;
 240
 241         /** @var bool|stdClass */
 242         public $lastDelete;
 243
 244         /** @var bool */
 245         public $mTokenOk = false;
 246
 247         /** @var bool */
 248         public $mTokenOkExceptSuffix = false;
 249
 250         /** @var bool */
 251         public $mTriedSave = false;
 252
 253         /** @var bool */
 254         public $incompleteForm = false;
 255
 256         /** @var bool */
 257         public $tooBig = false;
 258
 259         /** @var bool */
 260         public $kblength = false;
 261
 262         /** @var bool */
 263         public $missingComment = false;
 264
 265         /** @var bool */
 266         public $missingSummary = false;
 267
 268         /** @var bool */
 269         public $allowBlankSummary = false;
 270
 271         /** @var bool */
 272         protected $blankArticle = false;
 273
 274         /** @var bool */
 275         protected $allowBlankArticle = false;
 276
 277         /** @var bool */
 278         protected $selfRedirect = false;
 279
 280         /** @var bool */
 281         protected $allowSelfRedirect = false;
 282
 283         /** @var string */
 284         public $autoSumm = '';
 285
 286         /** @var string */
 287         public $hookError = '';
 288
 289         /** @var ParserOutput */
 290         public $mParserOutput;
 291
 292         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 293         public $hasPresetSummary = false;
 294
 295         /** @var bool */
 296         public $mBaseRevision = false;
 297
 298         /** @var bool */
 299         public $mShowSummaryField = true;
 300
 301         # Form values
 302
 303         /** @var bool */
 304         public $save = false;
 305
 306         /** @var bool */
 307         public $preview = false;
 308
 309         /** @var bool */
 310         public $diff = false;
 311
 312         /** @var bool */
 313         public $minoredit = false;
 314
 315         /** @var bool */
 316         public $watchthis = false;
 317
 318         /** @var bool */
 319         public $recreate = false;
 320
 321         /** @var string */
 322         public $textbox1 = '';
 323
 324         /** @var string */
 325         public $textbox2 = '';
 326
 327         /** @var string */
 328         public $summary = '';
 329
 330         /** @var bool */
 331         public $nosummary = false;
 332
 333         /** @var string */
 334         public $edittime = '';
 335
 336         /** @var string */
 337         public $section = '';
 338
 339         /** @var string */
 340         public $sectiontitle = '';
 341
 342         /** @var string */
 343         public $starttime = '';
 344
 345         /** @var int */
 346         public $oldid = 0;
 347
 348         /** @var int */
 349         public $parentRevId = 0;
 350
 351         /** @var string */
 352         public $editintro = '';
 353
 354         /** @var null */
 355         public $scrolltop = null;
 356
 357         /** @var bool */
 358         public $bot = true;
 359
 360         /** @var null|string */
 361         public $contentModel = null;
 362
 363         /** @var null|string */
 364         public $contentFormat = null;
 365
 366         /** @var null|array */
 367         public $changeTags = null;
 368
 369         # Placeholders for text injection by hooks (must be HTML)
 370         # extensions should take care to _append_ to the present value
 371
 372         /** @var string Before even the preview */
 373         public $editFormPageTop = '';
 374         public $editFormTextTop = '';
 375         public $editFormTextBeforeContent = '';
 376         public $editFormTextAfterWarn = '';
 377         public $editFormTextAfterTools = '';
 378         public $editFormTextBottom = '';
 379         public $editFormTextAfterContent = '';
 380         public $previewTextAfterContent = '';
 381         public $mPreloadContent = null;
 382
 383         /* $didSave should be set to true whenever an article was successfully altered. */
 384         public $didSave = false;
 385         public $undidRev = 0;
 386
 387         public $suppressIntro = false;
 388
 389         /** @var bool */
 390         protected $edit;
 391
 392         /**
 393          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 394          */
 395         private $enableApiEditOverride = false;
 396
 397         /**
 398          * @param Article $article
 399          */
 400         public function __construct( Article $article ) {
 401                 $this->mArticle = $article;
 402                 $this->mTitle = $article->getTitle();
 403
 404                 $this->contentModel = $this->mTitle->getContentModel();
 405
 406                 $handler = ContentHandler::getForModelID( $this->contentModel );
 407                 $this->contentFormat = $handler->getDefaultFormat();
 408         }
 409
 410         /**
 411          * @return Article
 412          */
 413         public function getArticle() {
 414                 return $this->mArticle;
 415         }
 416
 417         /**
 418          * @since 1.19
 419          * @return Title
 420          */
 421         public function getTitle() {
 422                 return $this->mTitle;
 423         }
 424
 425         /**
 426          * Set the context Title object
 427          *
 428          * @param Title|null $title Title object or null
 429          */
 430         public function setContextTitle( $title ) {
 431                 $this->mContextTitle = $title;
 432         }
 433
 434         /**
 435          * Get the context title object.
 436          * If not set, $wgTitle will be returned. This behavior might change in
 437          * the future to return $this->mTitle instead.
 438          *
 439          * @return Title
 440          */
 441         public function getContextTitle() {
 442                 if ( is_null( $this->mContextTitle ) ) {
 443                         global $wgTitle;
 444                         return $wgTitle;
 445                 } else {
 446                         return $this->mContextTitle;
 447                 }
 448         }
 449
 450         /**
 451          * Returns if the given content model is editable.
 452          *
 453          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 454          * @return bool
 455          * @throws MWException If $modelId has no known handler
 456          */
 457         public function isSupportedContentModel( $modelId ) {
 458                 return $this->enableApiEditOverride === true ||
 459                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 460         }
 461
 462         /**
 463          * Allow editing of content that supports API direct editing, but not general
 464          * direct editing. Set to false by default.
 465          *
 466          * @param bool $enableOverride
 467          */
 468         public function setApiEditOverride( $enableOverride ) {
 469                 $this->enableApiEditOverride = $enableOverride;
 470         }
 471
 472         function submit() {
 473                 $this->edit();
 474         }
 475
 476         /**
 477          * This is the function that gets called for "action=edit". It
 478          * sets up various member variables, then passes execution to
 479          * another function, usually showEditForm()
 480          *
 481          * The edit form is self-submitting, so that when things like
 482          * preview and edit conflicts occur, we get the same form back
 483          * with the extra stuff added.  Only when the final submission
 484          * is made and all is well do we actually save and redirect to
 485          * the newly-edited page.
 486          */
 487         function edit() {
 488                 global $wgOut, $wgRequest, $wgUser;
 489                 // Allow extensions to modify/prevent this form or submission
 490                 if ( !Hooks::run( 'AlternateEdit', array( $this ) ) ) {
 491                         return;
 492                 }
 493
 494                 wfDebug( __METHOD__ . ": enter\n" );
 495
 496                 // If they used redlink=1 and the page exists, redirect to the main article
 497                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 498                         $wgOut->redirect( $this->mTitle->getFullURL() );
 499                         return;
 500                 }
 501
 502                 $this->importFormData( $wgRequest );
 503                 $this->firsttime = false;
 504
 505                 if ( wfReadOnly() && $this->save ) {
 506                         // Force preview
 507                         $this->save = false;
 508                         $this->preview = true;
 509                 }
 510
 511                 if ( $this->save ) {
 512                         $this->formtype = 'save';
 513                 } elseif ( $this->preview ) {
 514                         $this->formtype = 'preview';
 515                 } elseif ( $this->diff ) {
 516                         $this->formtype = 'diff';
 517                 } else { # First time through
 518                         $this->firsttime = true;
 519                         if ( $this->previewOnOpen() ) {
 520                                 $this->formtype = 'preview';
 521                         } else {
 522                                 $this->formtype = 'initial';
 523                         }
 524                 }
 525
 526                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 527                 if ( $permErrors ) {
 528                         wfDebug( __METHOD__ . ": User can't edit\n" );
 529                         // Auto-block user's IP if the account was "hard" blocked
 530                         $user = $wgUser;
 531                         DeferredUpdates::addCallableUpdate( function() use ( $user ) {
 532                                 $user->spreadAnyEditBlock();
 533                         } );
 534
 535                         $this->displayPermissionsError( $permErrors );
 536
 537                         return;
 538                 }
 539
 540                 $revision = $this->mArticle->getRevisionFetched();
 541                 // Disallow editing revisions with content models different from the current one
 542                 if ( $revision && $revision->getContentModel() !== $this->contentModel ) {
 543                         $this->displayViewSourcePage(
 544                                 $this->getContentObject(),
 545                                 wfMessage(
 546                                         'contentmodelediterror',
 547                                         $revision->getContentModel(),
 548                                         $this->contentModel
 549                                 )->plain()
 550                         );
 551                         return;
 552                 }
 553
 554                 $this->isConflict = false;
 555                 // css / js subpages of user pages get a special treatment
 556                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 557                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 558                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 559                 // @todo FIXME: Silly assignment.
 560                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 561
 562                 # Show applicable editing introductions
 563                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 564                         $this->showIntro();
 565                 }
 566
 567                 # Attempt submission here.  This will check for edit conflicts,
 568                 # and redundantly check for locked database, blocked IPs, etc.
 569                 # that edit() already checked just in case someone tries to sneak
 570                 # in the back door with a hand-edited submission URL.
 571
 572                 if ( 'save' == $this->formtype ) {
 573                         $resultDetails = null;
 574                         $status = $this->attemptSave( $resultDetails );
 575                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 576                                 return;
 577                         }
 578                 }
 579
 580                 # First time through: get contents, set time for conflict
 581                 # checking, etc.
 582                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 583                         if ( $this->initialiseForm() === false ) {
 584                                 $this->noSuchSectionPage();
 585                                 return;
 586                         }
 587
 588                         if ( !$this->mTitle->getArticleID() ) {
 589                                 Hooks::run( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 590                         } else {
 591                                 Hooks::run( 'EditFormInitialText', array( $this ) );
 592                         }
 593
 594                 }
 595
 596                 $this->showEditForm();
 597         }
 598
 599         /**
 600          * @param string $rigor Same format as Title::getUserPermissionErrors()
 601          * @return array
 602          */
 603         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 604                 global $wgUser;
 605
 606                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 607                 # Can this title be created?
 608                 if ( !$this->mTitle->exists() ) {
 609                         $permErrors = array_merge(
 610                                 $permErrors,
 611                                 wfArrayDiff2(
 612                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 613                                         $permErrors
 614                                 )
 615                         );
 616                 }
 617                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 618                 $remove = array();
 619                 foreach ( $permErrors as $error ) {
 620                         if ( ( $this->preview || $this->diff )
 621                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 622                         ) {
 623                                 $remove[] = $error;
 624                         }
 625                 }
 626                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 627
 628                 return $permErrors;
 629         }
 630
 631         /**
 632          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 633          * but with the following differences:
 634          * - If redlink=1, the user will be redirected to the page
 635          * - If there is content to display or the error occurs while either saving,
 636          *   previewing or showing the difference, it will be a
 637          *   "View source for ..." page displaying the source code after the error message.
 638          *
 639          * @since 1.19
 640          * @param array $permErrors Array of permissions errors, as returned by
 641          *    Title::getUserPermissionsErrors().
 642          * @throws PermissionsError
 643          */
 644         protected function displayPermissionsError( array $permErrors ) {
 645                 global $wgRequest, $wgOut;
 646
 647                 if ( $wgRequest->getBool( 'redlink' ) ) {
 648                         // The edit page was reached via a red link.
 649                         // Redirect to the article page and let them click the edit tab if
 650                         // they really want a permission error.
 651                         $wgOut->redirect( $this->mTitle->getFullURL() );
 652                         return;
 653                 }
 654
 655                 $content = $this->getContentObject();
 656
 657                 # Use the normal message if there's nothing to display
 658                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 659                         $action = $this->mTitle->exists() ? 'edit' :
 660                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 661                         throw new PermissionsError( $action, $permErrors );
 662                 }
 663
 664                 $this->displayViewSourcePage(
 665                         $content,
 666                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 667                 );
 668         }
 669
 670         /**
 671          * Display a read-only View Source page
 672          * @param Content $content content object
 673          * @param string $errorMessage additional wikitext error message to display
 674          */
 675         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 676                 global $wgOut;
 677
 678                 Hooks::run( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 679
 680                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 681                 $wgOut->setPageTitle( wfMessage(
 682                         'viewsource-title',
 683                         $this->getContextTitle()->getPrefixedText()
 684                 ) );
 685                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 686                 $wgOut->addHTML( $this->editFormPageTop );
 687                 $wgOut->addHTML( $this->editFormTextTop );
 688
 689                 if ( $errorMessage !== '' ) {
 690                         $wgOut->addWikiText( $errorMessage );
 691                         $wgOut->addHTML( "<hr />\n" );
 692                 }
 693
 694                 # If the user made changes, preserve them when showing the markup
 695                 # (This happens when a user is blocked during edit, for instance)
 696                 if ( !$this->firsttime ) {
 697                         $text = $this->textbox1;
 698                         $wgOut->addWikiMsg( 'viewyourtext' );
 699                 } else {
 700                         try {
 701                                 $text = $this->toEditText( $content );
 702                         } catch ( MWException $e ) {
 703                                 # Serialize using the default format if the content model is not supported
 704                                 # (e.g. for an old revision with a different model)
 705                                 $text = $content->serialize();
 706                         }
 707                         $wgOut->addWikiMsg( 'viewsourcetext' );
 708                 }
 709
 710                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 711                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 712                 $wgOut->addHTML( $this->editFormTextAfterContent );
 713
 714                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 715                         Linker::formatTemplates( $this->getTemplates() ) ) );
 716
 717                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 718
 719                 $wgOut->addHTML( $this->editFormTextBottom );
 720                 if ( $this->mTitle->exists() ) {
 721                         $wgOut->returnToMain( null, $this->mTitle );
 722                 }
 723         }
 724
 725         /**
 726          * Should we show a preview when the edit form is first shown?
 727          *
 728          * @return bool
 729          */
 730         protected function previewOnOpen() {
 731                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 732                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 733                         // Explicit override from request
 734                         return true;
 735                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 736                         // Explicit override from request
 737                         return false;
 738                 } elseif ( $this->section == 'new' ) {
 739                         // Nothing *to* preview for new sections
 740                         return false;
 741                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 742                         && $wgUser->getOption( 'previewonfirst' )
 743                 ) {
 744                         // Standard preference behavior
 745                         return true;
 746                 } elseif ( !$this->mTitle->exists()
 747                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 748                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 749                 ) {
 750                         // Categories are special
 751                         return true;
 752                 } else {
 753                         return false;
 754                 }
 755         }
 756
 757         /**
 758          * Checks whether the user entered a skin name in uppercase,
 759          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 760          *
 761          * @return bool
 762          */
 763         protected function isWrongCaseCssJsPage() {
 764                 if ( $this->mTitle->isCssJsSubpage() ) {
 765                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 766                         $skins = array_merge(
 767                                 array_keys( Skin::getSkinNames() ),
 768                                 array( 'common' )
 769                         );
 770                         return !in_array( $name, $skins )
 771                                 && in_array( strtolower( $name ), $skins );
 772                 } else {
 773                         return false;
 774                 }
 775         }
 776
 777         /**
 778          * Returns whether section editing is supported for the current page.
 779          * Subclasses may override this to replace the default behavior, which is
 780          * to check ContentHandler::supportsSections.
 781          *
 782          * @return bool True if this edit page supports sections, false otherwise.
 783          */
 784         protected function isSectionEditSupported() {
 785                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 786                 return $contentHandler->supportsSections();
 787         }
 788
 789         /**
 790          * This function collects the form data and uses it to populate various member variables.
 791          * @param WebRequest $request
 792          * @throws ErrorPageError
 793          */
 794         function importFormData( &$request ) {
 795                 global $wgContLang, $wgUser;
 796
 797                 # Section edit can come from either the form or a link
 798                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 799
 800                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 801                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 802                 }
 803
 804                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 805
 806                 if ( $request->wasPosted() ) {
 807                         # These fields need to be checked for encoding.
 808                         # Also remove trailing whitespace, but don't remove _initial_
 809                         # whitespace from the text boxes. This may be significant formatting.
 810                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 811                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 812                                 // Skip this if wpTextbox2 has input, it indicates that we came
 813                                 // from a conflict page with raw page text, not a custom form
 814                                 // modified by subclasses
 815                                 $textbox1 = $this->importContentFormData( $request );
 816                                 if ( $textbox1 !== null ) {
 817                                         $this->textbox1 = $textbox1;
 818                                 }
 819                         }
 820
 821                         # Truncate for whole multibyte characters
 822                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 823
 824                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 825                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 826                         # section titles.
 827                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 828
 829                         # Treat sectiontitle the same way as summary.
 830                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 831                         # currently doing double duty as both edit summary and section title. Right now this
 832                         # is just to allow API edits to work around this limitation, but this should be
 833                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 834                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 835                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 836
 837                         $this->edittime = $request->getVal( 'wpEdittime' );
 838                         $this->starttime = $request->getVal( 'wpStarttime' );
 839
 840                         $undidRev = $request->getInt( 'wpUndidRevision' );
 841                         if ( $undidRev ) {
 842                                 $this->undidRev = $undidRev;
 843                         }
 844
 845                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 846
 847                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 848                                 // wpTextbox1 field is missing, possibly due to being "too big"
 849                                 // according to some filter rules such as Suhosin's setting for
 850                                 // suhosin.request.max_value_length (d'oh)
 851                                 $this->incompleteForm = true;
 852                         } else {
 853                                 // If we receive the last parameter of the request, we can fairly
 854                                 // claim the POST request has not been truncated.
 855
 856                                 // TODO: softened the check for cutover.  Once we determine
 857                                 // that it is safe, we should complete the transition by
 858                                 // removing the "edittime" clause.
 859                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 860                                         && is_null( $this->edittime ) );
 861                         }
 862                         if ( $this->incompleteForm ) {
 863                                 # If the form is incomplete, force to preview.
 864                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 865                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 866                                 $this->preview = true;
 867                         } else {
 868                                 $this->preview = $request->getCheck( 'wpPreview' );
 869                                 $this->diff = $request->getCheck( 'wpDiff' );
 870
 871                                 // Remember whether a save was requested, so we can indicate
 872                                 // if we forced preview due to session failure.
 873                                 $this->mTriedSave = !$this->preview;
 874
 875                                 if ( $this->tokenOk( $request ) ) {
 876                                         # Some browsers will not report any submit button
 877                                         # if the user hits enter in the comment box.
 878                                         # The unmarked state will be assumed to be a save,
 879                                         # if the form seems otherwise complete.
 880                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 881                                 } elseif ( $this->diff ) {
 882                                         # Failed token check, but only requested "Show Changes".
 883                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 884                                 } else {
 885                                         # Page might be a hack attempt posted from
 886                                         # an external site. Preview instead of saving.
 887                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 888                                         $this->preview = true;
 889                                 }
 890                         }
 891                         $this->save = !$this->preview && !$this->diff;
 892                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 893                                 $this->edittime = null;
 894                         }
 895
 896                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 897                                 $this->starttime = null;
 898                         }
 899
 900                         $this->recreate = $request->getCheck( 'wpRecreate' );
 901
 902                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 903                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 904
 905                         # Don't force edit summaries when a user is editing their own user or talk page
 906                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 907                                 && $this->mTitle->getText() == $wgUser->getName()
 908                         ) {
 909                                 $this->allowBlankSummary = true;
 910                         } else {
 911                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 912                                         || !$wgUser->getOption( 'forceeditsummary' );
 913                         }
 914
 915                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 916
 917                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 918                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 919
 920                         $changeTags = $request->getVal( 'wpChangeTags' );
 921                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 922                                 $this->changeTags = array();
 923                         } else {
 924                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 925                                         $changeTags ) ) );
 926                         }
 927                 } else {
 928                         # Not a posted form? Start with nothing.
 929                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 930                         $this->textbox1 = '';
 931                         $this->summary = '';
 932                         $this->sectiontitle = '';
 933                         $this->edittime = '';
 934                         $this->starttime = wfTimestampNow();
 935                         $this->edit = false;
 936                         $this->preview = false;
 937                         $this->save = false;
 938                         $this->diff = false;
 939                         $this->minoredit = false;
 940                         // Watch may be overridden by request parameters
 941                         $this->watchthis = $request->getBool( 'watchthis', false );
 942                         $this->recreate = false;
 943
 944                         // When creating a new section, we can preload a section title by passing it as the
 945                         // preloadtitle parameter in the URL (Bug 13100)
 946                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 947                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 948                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 949                                 $this->summary = $request->getVal( 'preloadtitle' );
 950                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 951                                 $this->summary = $request->getText( 'summary' );
 952                                 if ( $this->summary !== '' ) {
 953                                         $this->hasPresetSummary = true;
 954                                 }
 955                         }
 956
 957                         if ( $request->getVal( 'minor' ) ) {
 958                                 $this->minoredit = true;
 959                         }
 960                 }
 961
 962                 $this->oldid = $request->getInt( 'oldid' );
 963                 $this->parentRevId = $request->getInt( 'parentRevId' );
 964
 965                 $this->bot = $request->getBool( 'bot', true );
 966                 $this->nosummary = $request->getBool( 'nosummary' );
 967
 968                 // May be overridden by revision.
 969                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 970                 // May be overridden by revision.
 971                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 972
 973                 if ( !ContentHandler::getForModelID( $this->contentModel )
 974                         ->isSupportedFormat( $this->contentFormat )
 975                 ) {
 976                         throw new ErrorPageError(
 977                                 'editpage-notsupportedcontentformat-title',
 978                                 'editpage-notsupportedcontentformat-text',
 979                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 980                         );
 981                 }
 982
 983                 /**
 984                  * @todo Check if the desired model is allowed in this namespace, and if
 985                  *   a transition from the page's current model to the new model is
 986                  *   allowed.
 987                  */
 988
 989                 $this->editintro = $request->getText( 'editintro',
 990                         // Custom edit intro for new sections
 991                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 992
 993                 // Allow extensions to modify form data
 994                 Hooks::run( 'EditPage::importFormData', array( $this, $request ) );
 995
 996         }
 997
 998         /**
 999          * Subpage overridable method for extracting the page content data from the
1000          * posted form to be placed in $this->textbox1, if using customized input
1001          * this method should be overridden and return the page text that will be used
1002          * for saving, preview parsing and so on...
1003          *
1004          * @param WebRequest $request
1005          */
1006         protected function importContentFormData( &$request ) {
1007                 return; // Don't do anything, EditPage already extracted wpTextbox1
1008         }
1009
1010         /**
1011          * Initialise form fields in the object
1012          * Called on the first invocation, e.g. when a user clicks an edit link
1013          * @return bool If the requested section is valid
1014          */
1015         function initialiseForm() {
1016                 global $wgUser;
1017                 $this->edittime = $this->mArticle->getTimestamp();
1018
1019                 $content = $this->getContentObject( false ); # TODO: track content object?!
1020                 if ( $content === false ) {
1021                         return false;
1022                 }
1023                 $this->textbox1 = $this->toEditText( $content );
1024
1025                 // activate checkboxes if user wants them to be always active
1026                 # Sort out the "watch" checkbox
1027                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1028                         # Watch all edits
1029                         $this->watchthis = true;
1030                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1031                         # Watch creations
1032                         $this->watchthis = true;
1033                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1034                         # Already watched
1035                         $this->watchthis = true;
1036                 }
1037                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1038                         $this->minoredit = true;
1039                 }
1040                 if ( $this->textbox1 === false ) {
1041                         return false;
1042                 }
1043                 return true;
1044         }
1045
1046         /**
1047          * @param Content|null $def_content The default value to return
1048          *
1049          * @return Content|null Content on success, $def_content for invalid sections
1050          *
1051          * @since 1.21
1052          */
1053         protected function getContentObject( $def_content = null ) {
1054                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1055
1056                 $content = false;
1057
1058                 // For message page not locally set, use the i18n message.
1059                 // For other non-existent articles, use preload text if any.
1060                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1061                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1062                                 # If this is a system message, get the default text.
1063                                 $msg = $this->mTitle->getDefaultMessageText();
1064
1065                                 $content = $this->toEditContent( $msg );
1066                         }
1067                         if ( $content === false ) {
1068                                 # If requested, preload some text.
1069                                 $preload = $wgRequest->getVal( 'preload',
1070                                         // Custom preload text for new sections
1071                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1072                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1073
1074                                 $content = $this->getPreloadedContent( $preload, $params );
1075                         }
1076                 // For existing pages, get text based on "undo" or section parameters.
1077                 } else {
1078                         if ( $this->section != '' ) {
1079                                 // Get section edit text (returns $def_text for invalid sections)
1080                                 $orig = $this->getOriginalContent( $wgUser );
1081                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1082
1083                                 if ( !$content ) {
1084                                         $content = $def_content;
1085                                 }
1086                         } else {
1087                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1088                                 $undo = $wgRequest->getInt( 'undo' );
1089
1090                                 if ( $undo > 0 && $undoafter > 0 ) {
1091                                         $undorev = Revision::newFromId( $undo );
1092                                         $oldrev = Revision::newFromId( $undoafter );
1093
1094                                         # Sanity check, make sure it's the right page,
1095                                         # the revisions exist and they were not deleted.
1096                                         # Otherwise, $content will be left as-is.
1097                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1098                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1099                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1100                                         ) {
1101                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1102
1103                                                 if ( $content === false ) {
1104                                                         # Warn the user that something went wrong
1105                                                         $undoMsg = 'failure';
1106                                                 } else {
1107                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1108                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1109                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1110
1111                                                         if ( $newContent->equals( $oldContent ) ) {
1112                                                                 # Tell the user that the undo results in no change,
1113                                                                 # i.e. the revisions were already undone.
1114                                                                 $undoMsg = 'nochange';
1115                                                                 $content = false;
1116                                                         } else {
1117                                                                 # Inform the user of our success and set an automatic edit summary
1118                                                                 $undoMsg = 'success';
1119
1120                                                                 # If we just undid one rev, use an autosummary
1121                                                                 $firstrev = $oldrev->getNext();
1122                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1123                                                                         $userText = $undorev->getUserText();
1124                                                                         if ( $userText === '' ) {
1125                                                                                 $undoSummary = wfMessage(
1126                                                                                         'undo-summary-username-hidden',
1127                                                                                         $undo
1128                                                                                 )->inContentLanguage()->text();
1129                                                                         } else {
1130                                                                                 $undoSummary = wfMessage(
1131                                                                                         'undo-summary',
1132                                                                                         $undo,
1133                                                                                         $userText
1134                                                                                 )->inContentLanguage()->text();
1135                                                                         }
1136                                                                         if ( $this->summary === '' ) {
1137                                                                                 $this->summary = $undoSummary;
1138                                                                         } else {
1139                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1140                                                                                         ->inContentLanguage()->text() . $this->summary;
1141                                                                         }
1142                                                                         $this->undidRev = $undo;
1143                                                                 }
1144                                                                 $this->formtype = 'diff';
1145                                                         }
1146                                                 }
1147                                         } else {
1148                                                 // Failed basic sanity checks.
1149                                                 // Older revisions may have been removed since the link
1150                                                 // was created, or we may simply have got bogus input.
1151                                                 $undoMsg = 'norev';
1152                                         }
1153
1154                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1155                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1156                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1157                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1158                                 }
1159
1160                                 if ( $content === false ) {
1161                                         $content = $this->getOriginalContent( $wgUser );
1162                                 }
1163                         }
1164                 }
1165
1166                 return $content;
1167         }
1168
1169         /**
1170          * Get the content of the wanted revision, without section extraction.
1171          *
1172          * The result of this function can be used to compare user's input with
1173          * section replaced in its context (using WikiPage::replaceSection())
1174          * to the original text of the edit.
1175          *
1176          * This differs from Article::getContent() that when a missing revision is
1177          * encountered the result will be null and not the
1178          * 'missing-revision' message.
1179          *
1180          * @since 1.19
1181          * @param User $user The user to get the revision for
1182          * @return Content|null
1183          */
1184         private function getOriginalContent( User $user ) {
1185                 if ( $this->section == 'new' ) {
1186                         return $this->getCurrentContent();
1187                 }
1188                 $revision = $this->mArticle->getRevisionFetched();
1189                 if ( $revision === null ) {
1190                         if ( !$this->contentModel ) {
1191                                 $this->contentModel = $this->getTitle()->getContentModel();
1192                         }
1193                         $handler = ContentHandler::getForModelID( $this->contentModel );
1194
1195                         return $handler->makeEmptyContent();
1196                 }
1197                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1198                 return $content;
1199         }
1200
1201         /**
1202          * Get the current content of the page. This is basically similar to
1203          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1204          * content object is returned instead of null.
1205          *
1206          * @since 1.21
1207          * @return Content
1208          */
1209         protected function getCurrentContent() {
1210                 $rev = $this->mArticle->getRevision();
1211                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1212
1213                 if ( $content === false || $content === null ) {
1214                         if ( !$this->contentModel ) {
1215                                 $this->contentModel = $this->getTitle()->getContentModel();
1216                         }
1217                         $handler = ContentHandler::getForModelID( $this->contentModel );
1218
1219                         return $handler->makeEmptyContent();
1220                 } else {
1221                         # nasty side-effect, but needed for consistency
1222                         $this->contentModel = $rev->getContentModel();
1223                         $this->contentFormat = $rev->getContentFormat();
1224
1225                         return $content;
1226                 }
1227         }
1228
1229         /**
1230          * Use this method before edit() to preload some content into the edit box
1231          *
1232          * @param Content $content
1233          *
1234          * @since 1.21
1235          */
1236         public function setPreloadedContent( Content $content ) {
1237                 $this->mPreloadContent = $content;
1238         }
1239
1240         /**
1241          * Get the contents to be preloaded into the box, either set by
1242          * an earlier setPreloadText() or by loading the given page.
1243          *
1244          * @param string $preload Representing the title to preload from.
1245          * @param array $params Parameters to use (interface-message style) in the preloaded text
1246          *
1247          * @return Content
1248          *
1249          * @since 1.21
1250          */
1251         protected function getPreloadedContent( $preload, $params = array() ) {
1252                 global $wgUser;
1253
1254                 if ( !empty( $this->mPreloadContent ) ) {
1255                         return $this->mPreloadContent;
1256                 }
1257
1258                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1259
1260                 if ( $preload === '' ) {
1261                         return $handler->makeEmptyContent();
1262                 }
1263
1264                 $title = Title::newFromText( $preload );
1265                 # Check for existence to avoid getting MediaWiki:Noarticletext
1266                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1267                         // TODO: somehow show a warning to the user!
1268                         return $handler->makeEmptyContent();
1269                 }
1270
1271                 $page = WikiPage::factory( $title );
1272                 if ( $page->isRedirect() ) {
1273                         $title = $page->getRedirectTarget();
1274                         # Same as before
1275                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1276                                 // TODO: somehow show a warning to the user!
1277                                 return $handler->makeEmptyContent();
1278                         }
1279                         $page = WikiPage::factory( $title );
1280                 }
1281
1282                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1283                 $content = $page->getContent( Revision::RAW );
1284
1285                 if ( !$content ) {
1286                         // TODO: somehow show a warning to the user!
1287                         return $handler->makeEmptyContent();
1288                 }
1289
1290                 if ( $content->getModel() !== $handler->getModelID() ) {
1291                         $converted = $content->convert( $handler->getModelID() );
1292
1293                         if ( !$converted ) {
1294                                 // TODO: somehow show a warning to the user!
1295                                 wfDebug( "Attempt to preload incompatible content: " .
1296                                         "can't convert " . $content->getModel() .
1297                                         " to " . $handler->getModelID() );
1298
1299                                 return $handler->makeEmptyContent();
1300                         }
1301
1302                         $content = $converted;
1303                 }
1304
1305                 return $content->preloadTransform( $title, $parserOptions, $params );
1306         }
1307
1308         /**
1309          * Make sure the form isn't faking a user's credentials.
1310          *
1311          * @param WebRequest $request
1312          * @return bool
1313          * @private
1314          */
1315         function tokenOk( &$request ) {
1316                 global $wgUser;
1317                 $token = $request->getVal( 'wpEditToken' );
1318                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1319                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1320                 return $this->mTokenOk;
1321         }
1322
1323         /**
1324          * Sets post-edit cookie indicating the user just saved a particular revision.
1325          *
1326          * This uses a temporary cookie for each revision ID so separate saves will never
1327          * interfere with each other.
1328          *
1329          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1330          * the redirect.  It must be clearable by JavaScript code, so it must not be
1331          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1332          * variable.
1333          *
1334          * If the variable were set on the server, it would be cached, which is unwanted
1335          * since the post-edit state should only apply to the load right after the save.
1336          *
1337          * @param int $statusValue The status value (to check for new article status)
1338          */
1339         protected function setPostEditCookie( $statusValue ) {
1340                 $revisionId = $this->mArticle->getLatest();
1341                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1342
1343                 $val = 'saved';
1344                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1345                         $val = 'created';
1346                 } elseif ( $this->oldid ) {
1347                         $val = 'restored';
1348                 }
1349
1350                 $response = RequestContext::getMain()->getRequest()->response();
1351                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1352                         'httpOnly' => false,
1353                 ) );
1354         }
1355
1356         /**
1357          * Attempt submission
1358          * @param array $resultDetails See docs for $result in internalAttemptSave
1359          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1360          * @return Status The resulting status object.
1361          */
1362         public function attemptSave( &$resultDetails = false ) {
1363                 global $wgUser;
1364
1365                 # Allow bots to exempt some edits from bot flagging
1366                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1367                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1368
1369                 Hooks::run( 'EditPage::attemptSave:after', array( $this, $status, $resultDetails ) );
1370
1371                 return $status;
1372         }
1373
1374         /**
1375          * Handle status, such as after attempt save
1376          *
1377          * @param Status $status
1378          * @param array|bool $resultDetails
1379          *
1380          * @throws ErrorPageError
1381          * @return bool False, if output is done, true if rest of the form should be displayed
1382          */
1383         private function handleStatus( Status $status, $resultDetails ) {
1384                 global $wgUser, $wgOut;
1385
1386                 /**
1387                  * @todo FIXME: once the interface for internalAttemptSave() is made
1388                  *   nicer, this should use the message in $status
1389                  */
1390                 if ( $status->value == self::AS_SUCCESS_UPDATE
1391                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1392                 ) {
1393                         $this->didSave = true;
1394                         if ( !$resultDetails['nullEdit'] ) {
1395                                 $this->setPostEditCookie( $status->value );
1396                         }
1397                 }
1398
1399                 switch ( $status->value ) {
1400                         case self::AS_HOOK_ERROR_EXPECTED:
1401                         case self::AS_CONTENT_TOO_BIG:
1402                         case self::AS_ARTICLE_WAS_DELETED:
1403                         case self::AS_CONFLICT_DETECTED:
1404                         case self::AS_SUMMARY_NEEDED:
1405                         case self::AS_TEXTBOX_EMPTY:
1406                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1407                         case self::AS_END:
1408                         case self::AS_BLANK_ARTICLE:
1409                         case self::AS_SELF_REDIRECT:
1410                                 return true;
1411
1412                         case self::AS_HOOK_ERROR:
1413                                 return false;
1414
1415                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1416                         case self::AS_PARSE_ERROR:
1417                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1418                                 return true;
1419
1420                         case self::AS_SUCCESS_NEW_ARTICLE:
1421                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1422                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1423                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1424                                 return false;
1425
1426                         case self::AS_SUCCESS_UPDATE:
1427                                 $extraQuery = '';
1428                                 $sectionanchor = $resultDetails['sectionanchor'];
1429
1430                                 // Give extensions a chance to modify URL query on update
1431                                 Hooks::run(
1432                                         'ArticleUpdateBeforeRedirect',
1433                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1434                                 );
1435
1436                                 if ( $resultDetails['redirect'] ) {
1437                                         if ( $extraQuery == '' ) {
1438                                                 $extraQuery = 'redirect=no';
1439                                         } else {
1440                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1441                                         }
1442                                 }
1443                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1444                                 return false;
1445
1446                         case self::AS_SPAM_ERROR:
1447                                 $this->spamPageWithContent( $resultDetails['spam'] );
1448                                 return false;
1449
1450                         case self::AS_BLOCKED_PAGE_FOR_USER:
1451                                 throw new UserBlockedError( $wgUser->getBlock() );
1452
1453                         case self::AS_IMAGE_REDIRECT_ANON:
1454                         case self::AS_IMAGE_REDIRECT_LOGGED:
1455                                 throw new PermissionsError( 'upload' );
1456
1457                         case self::AS_READ_ONLY_PAGE_ANON:
1458                         case self::AS_READ_ONLY_PAGE_LOGGED:
1459                                 throw new PermissionsError( 'edit' );
1460
1461                         case self::AS_READ_ONLY_PAGE:
1462                                 throw new ReadOnlyError;
1463
1464                         case self::AS_RATE_LIMITED:
1465                                 throw new ThrottledError();
1466
1467                         case self::AS_NO_CREATE_PERMISSION:
1468                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1469                                 throw new PermissionsError( $permission );
1470
1471                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1472                                 throw new PermissionsError( 'editcontentmodel' );
1473
1474                         default:
1475                                 // We don't recognize $status->value. The only way that can happen
1476                                 // is if an extension hook aborted from inside ArticleSave.
1477                                 // Render the status object into $this->hookError
1478                                 // FIXME this sucks, we should just use the Status object throughout
1479                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1480                                         '</div>';
1481                                 return true;
1482                 }
1483         }
1484
1485         /**
1486          * Run hooks that can filter edits just before they get saved.
1487          *
1488          * @param Content $content The Content to filter.
1489          * @param Status $status For reporting the outcome to the caller
1490          * @param User $user The user performing the edit
1491          *
1492          * @return bool
1493          */
1494         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1495                 // Run old style post-section-merge edit filter
1496                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1497                         array( $this, $content, &$this->hookError, $this->summary ) )
1498                 ) {
1499                         # Error messages etc. could be handled within the hook...
1500                         $status->fatal( 'hookaborted' );
1501                         $status->value = self::AS_HOOK_ERROR;
1502                         return false;
1503                 } elseif ( $this->hookError != '' ) {
1504                         # ...or the hook could be expecting us to produce an error
1505                         $status->fatal( 'hookaborted' );
1506                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1507                         return false;
1508                 }
1509
1510                 // Run new style post-section-merge edit filter
1511                 if ( !Hooks::run( 'EditFilterMergedContent',
1512                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1513                                 $user, $this->minoredit ) )
1514                 ) {
1515                         # Error messages etc. could be handled within the hook...
1516                         if ( $status->isGood() ) {
1517                                 $status->fatal( 'hookaborted' );
1518                                 // Not setting $this->hookError here is a hack to allow the hook
1519                                 // to cause a return to the edit page without $this->hookError
1520                                 // being set. This is used by ConfirmEdit to display a captcha
1521                                 // without any error message cruft.
1522                         } else {
1523                                 $this->hookError = $status->getWikiText();
1524                         }
1525                         // Use the existing $status->value if the hook set it
1526                         if ( !$status->value ) {
1527                                 $status->value = self::AS_HOOK_ERROR;
1528                         }
1529                         return false;
1530                 } elseif ( !$status->isOK() ) {
1531                         # ...or the hook could be expecting us to produce an error
1532                         // FIXME this sucks, we should just use the Status object throughout
1533                         $this->hookError = $status->getWikiText();
1534                         $status->fatal( 'hookaborted' );
1535                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1536                         return false;
1537                 }
1538
1539                 return true;
1540         }
1541
1542         /**
1543          * Return the summary to be used for a new section.
1544          *
1545          * @param string $sectionanchor Set to the section anchor text
1546          * @return string
1547          */
1548         private function newSectionSummary( &$sectionanchor = null ) {
1549                 global $wgParser;
1550
1551                 if ( $this->sectiontitle !== '' ) {
1552                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1553                         // If no edit summary was specified, create one automatically from the section
1554                         // title and have it link to the new section. Otherwise, respect the summary as
1555                         // passed.
1556                         if ( $this->summary === '' ) {
1557                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1558                                 return wfMessage( 'newsectionsummary' )
1559                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1560                         }
1561                 } elseif ( $this->summary !== '' ) {
1562                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1563                         # This is a new section, so create a link to the new section
1564                         # in the revision summary.
1565                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1566                         return wfMessage( 'newsectionsummary' )
1567                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1568                 }
1569                 return $this->summary;
1570         }
1571
1572         /**
1573          * Attempt submission (no UI)
1574          *
1575          * @param array $result Array to add statuses to, currently with the
1576          *   possible keys:
1577          *   - spam (string): Spam string from content if any spam is detected by
1578          *     matchSpamRegex.
1579          *   - sectionanchor (string): Section anchor for a section save.
1580          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1581          *     false otherwise.
1582          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1583          *     revision is a redirect.
1584          * @param bool $bot True if edit is being made under the bot right.
1585          *
1586          * @return Status Status object, possibly with a message, but always with
1587          *   one of the AS_* constants in $status->value,
1588          *
1589          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1590          *   various error display idiosyncrasies. There are also lots of cases
1591          *   where error metadata is set in the object and retrieved later instead
1592          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1593          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1594          * time.
1595          */
1596         function internalAttemptSave( &$result, $bot = false ) {
1597                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1598                 global $wgContentHandlerUseDB;
1599
1600                 $status = Status::newGood();
1601
1602                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1603                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1604                         $status->fatal( 'hookaborted' );
1605                         $status->value = self::AS_HOOK_ERROR;
1606                         return $status;
1607                 }
1608
1609                 $spam = $wgRequest->getText( 'wpAntispam' );
1610                 if ( $spam !== '' ) {
1611                         wfDebugLog(
1612                                 'SimpleAntiSpam',
1613                                 $wgUser->getName() .
1614                                 ' editing "' .
1615                                 $this->mTitle->getPrefixedText() .
1616                                 '" submitted bogus field "' .
1617                                 $spam .
1618                                 '"'
1619                         );
1620                         $status->fatal( 'spamprotectionmatch', false );
1621                         $status->value = self::AS_SPAM_ERROR;
1622                         return $status;
1623                 }
1624
1625                 try {
1626                         # Construct Content object
1627                         $textbox_content = $this->toEditContent( $this->textbox1 );
1628                 } catch ( MWContentSerializationException $ex ) {
1629                         $status->fatal(
1630                                 'content-failed-to-parse',
1631                                 $this->contentModel,
1632                                 $this->contentFormat,
1633                                 $ex->getMessage()
1634                         );
1635                         $status->value = self::AS_PARSE_ERROR;
1636                         return $status;
1637                 }
1638
1639                 # Check image redirect
1640                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1641                         $textbox_content->isRedirect() &&
1642                         !$wgUser->isAllowed( 'upload' )
1643                 ) {
1644                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1645                                 $status->setResult( false, $code );
1646
1647                                 return $status;
1648                 }
1649
1650                 # Check for spam
1651                 $match = self::matchSummarySpamRegex( $this->summary );
1652                 if ( $match === false && $this->section == 'new' ) {
1653                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1654                         # regular summaries, it is added to the actual wikitext.
1655                         if ( $this->sectiontitle !== '' ) {
1656                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1657                                 $match = self::matchSpamRegex( $this->sectiontitle );
1658                         } else {
1659                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1660                                 # is used with the 'summary' parameter.
1661                                 $match = self::matchSpamRegex( $this->summary );
1662                         }
1663                 }
1664                 if ( $match === false ) {
1665                         $match = self::matchSpamRegex( $this->textbox1 );
1666                 }
1667                 if ( $match !== false ) {
1668                         $result['spam'] = $match;
1669                         $ip = $wgRequest->getIP();
1670                         $pdbk = $this->mTitle->getPrefixedDBkey();
1671                         $match = str_replace( "\n", '', $match );
1672                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1673                         $status->fatal( 'spamprotectionmatch', $match );
1674                         $status->value = self::AS_SPAM_ERROR;
1675                         return $status;
1676                 }
1677                 if ( !Hooks::run(
1678                         'EditFilter',
1679                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1680                 ) {
1681                         # Error messages etc. could be handled within the hook...
1682                         $status->fatal( 'hookaborted' );
1683                         $status->value = self::AS_HOOK_ERROR;
1684                         return $status;
1685                 } elseif ( $this->hookError != '' ) {
1686                         # ...or the hook could be expecting us to produce an error
1687                         $status->fatal( 'hookaborted' );
1688                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1689                         return $status;
1690                 }
1691
1692                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1693                         // Auto-block user's IP if the account was "hard" blocked
1694                         $wgUser->spreadAnyEditBlock();
1695                         # Check block state against master, thus 'false'.
1696                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1697                         return $status;
1698                 }
1699
1700                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1701                 if ( $this->kblength > $wgMaxArticleSize ) {
1702                         // Error will be displayed by showEditForm()
1703                         $this->tooBig = true;
1704                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1705                         return $status;
1706                 }
1707
1708                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1709                         if ( $wgUser->isAnon() ) {
1710                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1711                                 return $status;
1712                         } else {
1713                                 $status->fatal( 'readonlytext' );
1714                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1715                                 return $status;
1716                         }
1717                 }
1718
1719                 $changingContentModel = false;
1720                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1721                         if ( !$wgContentHandlerUseDB ) {
1722                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1723                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1724                                 return $status;
1725                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1726                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1727                                 return $status;
1728
1729                         }
1730                         $changingContentModel = true;
1731                         $oldContentModel = $this->mTitle->getContentModel();
1732                 }
1733
1734                 if ( $this->changeTags ) {
1735                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1736                                 $this->changeTags, $wgUser );
1737                         if ( !$changeTagsStatus->isOK() ) {
1738                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1739                                 return $changeTagsStatus;
1740                         }
1741                 }
1742
1743                 if ( wfReadOnly() ) {
1744                         $status->fatal( 'readonlytext' );
1745                         $status->value = self::AS_READ_ONLY_PAGE;
1746                         return $status;
1747                 }
1748                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1749                         $status->fatal( 'actionthrottledtext' );
1750                         $status->value = self::AS_RATE_LIMITED;
1751                         return $status;
1752                 }
1753
1754                 # If the article has been deleted while editing, don't save it without
1755                 # confirmation
1756                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1757                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1758                         return $status;
1759                 }
1760
1761                 # Load the page data from the master. If anything changes in the meantime,
1762                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1763                 $this->mArticle->loadPageData( 'fromdbmaster' );
1764                 $new = !$this->mArticle->exists();
1765
1766                 if ( $new ) {
1767                         // Late check for create permission, just in case *PARANOIA*
1768                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1769                                 $status->fatal( 'nocreatetext' );
1770                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1771                                 wfDebug( __METHOD__ . ": no create permission\n" );
1772                                 return $status;
1773                         }
1774
1775                         // Don't save a new page if it's blank or if it's a MediaWiki:
1776                         // message with content equivalent to default (allow empty pages
1777                         // in this case to disable messages, see bug 50124)
1778                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1779                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1780                                 $defaultText = $defaultMessageText;
1781                         } else {
1782                                 $defaultText = '';
1783                         }
1784
1785                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1786                                 $this->blankArticle = true;
1787                                 $status->fatal( 'blankarticle' );
1788                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1789                                 return $status;
1790                         }
1791
1792                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1793                                 return $status;
1794                         }
1795
1796                         $content = $textbox_content;
1797
1798                         $result['sectionanchor'] = '';
1799                         if ( $this->section == 'new' ) {
1800                                 if ( $this->sectiontitle !== '' ) {
1801                                         // Insert the section title above the content.
1802                                         $content = $content->addSectionHeader( $this->sectiontitle );
1803                                 } elseif ( $this->summary !== '' ) {
1804                                         // Insert the section title above the content.
1805                                         $content = $content->addSectionHeader( $this->summary );
1806                                 }
1807                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1808                         }
1809
1810                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1811
1812                 } else { # not $new
1813
1814                         # Article exists. Check for edit conflict.
1815
1816                         $this->mArticle->clear(); # Force reload of dates, etc.
1817                         $timestamp = $this->mArticle->getTimestamp();
1818
1819                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1820
1821                         if ( $timestamp != $this->edittime ) {
1822                                 $this->isConflict = true;
1823                                 if ( $this->section == 'new' ) {
1824                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1825                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1826                                         ) {
1827                                                 // Probably a duplicate submission of a new comment.
1828                                                 // This can happen when squid resends a request after
1829                                                 // a timeout but the first one actually went through.
1830                                                 wfDebug( __METHOD__
1831                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1832                                         } else {
1833                                                 // New comment; suppress conflict.
1834                                                 $this->isConflict = false;
1835                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1836                                         }
1837                                 } elseif ( $this->section == ''
1838                                         && Revision::userWasLastToEdit(
1839                                                 DB_MASTER, $this->mTitle->getArticleID(),
1840                                                 $wgUser->getId(), $this->edittime
1841                                         )
1842                                 ) {
1843                                         # Suppress edit conflict with self, except for section edits where merging is required.
1844                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1845                                         $this->isConflict = false;
1846                                 }
1847                         }
1848
1849                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1850                         if ( $this->sectiontitle !== '' ) {
1851                                 $sectionTitle = $this->sectiontitle;
1852                         } else {
1853                                 $sectionTitle = $this->summary;
1854                         }
1855
1856                         $content = null;
1857
1858                         if ( $this->isConflict ) {
1859                                 wfDebug( __METHOD__
1860                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1861                                         . " (article time '{$timestamp}')\n" );
1862
1863                                 $content = $this->mArticle->replaceSectionContent(
1864                                         $this->section,
1865                                         $textbox_content,
1866                                         $sectionTitle,
1867                                         $this->edittime
1868                                 );
1869                         } else {
1870                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1871                                 $content = $this->mArticle->replaceSectionContent(
1872                                         $this->section,
1873                                         $textbox_content,
1874                                         $sectionTitle
1875                                 );
1876                         }
1877
1878                         if ( is_null( $content ) ) {
1879                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1880                                 $this->isConflict = true;
1881                                 $content = $textbox_content; // do not try to merge here!
1882                         } elseif ( $this->isConflict ) {
1883                                 # Attempt merge
1884                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1885                                         // Successful merge! Maybe we should tell the user the good news?
1886                                         $this->isConflict = false;
1887                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1888                                 } else {
1889                                         $this->section = '';
1890                                         $this->textbox1 = ContentHandler::getContentText( $content );
1891                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1892                                 }
1893                         }
1894
1895                         if ( $this->isConflict ) {
1896                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1897                                 return $status;
1898                         }
1899
1900                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1901                                 return $status;
1902                         }
1903
1904                         if ( $this->section == 'new' ) {
1905                                 // Handle the user preference to force summaries here
1906                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1907                                         $this->missingSummary = true;
1908                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1909                                         $status->value = self::AS_SUMMARY_NEEDED;
1910                                         return $status;
1911                                 }
1912
1913                                 // Do not allow the user to post an empty comment
1914                                 if ( $this->textbox1 == '' ) {
1915                                         $this->missingComment = true;
1916                                         $status->fatal( 'missingcommenttext' );
1917                                         $status->value = self::AS_TEXTBOX_EMPTY;
1918                                         return $status;
1919                                 }
1920                         } elseif ( !$this->allowBlankSummary
1921                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1922                                 && !$content->isRedirect()
1923                                 && md5( $this->summary ) == $this->autoSumm
1924                         ) {
1925                                 $this->missingSummary = true;
1926                                 $status->fatal( 'missingsummary' );
1927                                 $status->value = self::AS_SUMMARY_NEEDED;
1928                                 return $status;
1929                         }
1930
1931                         # All's well
1932                         $sectionanchor = '';
1933                         if ( $this->section == 'new' ) {
1934                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1935                         } elseif ( $this->section != '' ) {
1936                                 # Try to get a section anchor from the section source, redirect
1937                                 # to edited section if header found.
1938                                 # XXX: Might be better to integrate this into Article::replaceSection
1939                                 # for duplicate heading checking and maybe parsing.
1940                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1941                                 # We can't deal with anchors, includes, html etc in the header for now,
1942                                 # headline would need to be parsed to improve this.
1943                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1944                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1945                                 }
1946                         }
1947                         $result['sectionanchor'] = $sectionanchor;
1948
1949                         // Save errors may fall down to the edit form, but we've now
1950                         // merged the section into full text. Clear the section field
1951                         // so that later submission of conflict forms won't try to
1952                         // replace that into a duplicated mess.
1953                         $this->textbox1 = $this->toEditText( $content );
1954                         $this->section = '';
1955
1956                         $status->value = self::AS_SUCCESS_UPDATE;
1957                 }
1958
1959                 if ( !$this->allowSelfRedirect
1960                         && $content->isRedirect()
1961                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1962                 ) {
1963                         // If the page already redirects to itself, don't warn.
1964                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1965                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1966                                 $this->selfRedirect = true;
1967                                 $status->fatal( 'selfredirect' );
1968                                 $status->value = self::AS_SELF_REDIRECT;
1969                                 return $status;
1970                         }
1971                 }
1972
1973                 // Check for length errors again now that the section is merged in
1974                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1975                 if ( $this->kblength > $wgMaxArticleSize ) {
1976                         $this->tooBig = true;
1977                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1978                         return $status;
1979                 }
1980
1981                 $flags = EDIT_AUTOSUMMARY |
1982                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1983                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1984                         ( $bot ? EDIT_FORCE_BOT : 0 );
1985
1986                 $doEditStatus = $this->mArticle->doEditContent(
1987                         $content,
1988                         $this->summary,
1989                         $flags,
1990                         false,
1991                         $wgUser,
1992                         $content->getDefaultFormat()
1993                 );
1994
1995                 if ( !$doEditStatus->isOK() ) {
1996                         // Failure from doEdit()
1997                         // Show the edit conflict page for certain recognized errors from doEdit(),
1998                         // but don't show it for errors from extension hooks
1999                         $errors = $doEditStatus->getErrorsArray();
2000                         if ( in_array( $errors[0][0],
2001                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
2002                         ) {
2003                                 $this->isConflict = true;
2004                                 // Destroys data doEdit() put in $status->value but who cares
2005                                 $doEditStatus->value = self::AS_END;
2006                         }
2007                         return $doEditStatus;
2008                 }
2009
2010                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2011                 if ( $result['nullEdit'] ) {
2012                         // We don't know if it was a null edit until now, so increment here
2013                         $wgUser->pingLimiter( 'linkpurge' );
2014                 }
2015                 $result['redirect'] = $content->isRedirect();
2016
2017                 $this->updateWatchlist();
2018
2019                 if ( $this->changeTags && isset( $doEditStatus->value['revision'] ) ) {
2020                         // If a revision was created, apply any change tags that were requested
2021                         $addTags = $this->changeTags;
2022                         $revId = $doEditStatus->value['revision']->getId();
2023                         // Defer this both for performance and so that addTags() sees the rc_id
2024                         // since the recentchange entry addition is deferred first (bug T100248)
2025                         DeferredUpdates::addCallableUpdate( function() use ( $addTags, $revId ) {
2026                                 ChangeTags::addTags( $addTags, null, $revId );
2027                         } );
2028                 }
2029
2030                 // If the content model changed, add a log entry
2031                 if ( $changingContentModel ) {
2032                         $this->addContentModelChangeLogEntry(
2033                                 $wgUser,
2034                                 $oldContentModel,
2035                                 $this->contentModel,
2036                                 $this->summary
2037                         );
2038                 }
2039
2040                 return $status;
2041         }
2042
2043         /**
2044          * @param User $user
2045          * @param string $oldModel
2046          * @param string $newModel
2047          * @param string $reason
2048          */
2049         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2050                 $log = new ManualLogEntry( 'contentmodel', 'change' );
2051                 $log->setPerformer( $user );
2052                 $log->setTarget( $this->mTitle );
2053                 $log->setComment( $reason );
2054                 $log->setParameters( array(
2055                         '4::oldmodel' => $oldModel,
2056                         '5::newmodel' => $newModel
2057                 ) );
2058                 $logid = $log->insert();
2059                 $log->publish( $logid );
2060         }
2061
2062         /**
2063          * Register the change of watch status
2064          */
2065         protected function updateWatchlist() {
2066                 global $wgUser;
2067
2068                 if ( !$wgUser->isLoggedIn() ) {
2069                         return;
2070                 }
2071
2072                 $user = $wgUser;
2073                 $title = $this->mTitle;
2074                 $watch = $this->watchthis;
2075                 // Do this in its own transaction to reduce contention...
2076                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2077                         if ( $watch == $user->isWatched( $title, WatchedItem::IGNORE_USER_RIGHTS ) ) {
2078                                 return; // nothing to change
2079                         }
2080                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2081                 } );
2082         }
2083
2084         /**
2085          * Attempts to do 3-way merge of edit content with a base revision
2086          * and current content, in case of edit conflict, in whichever way appropriate
2087          * for the content type.
2088          *
2089          * @since 1.21
2090          *
2091          * @param Content $editContent
2092          *
2093          * @return bool
2094          */
2095         private function mergeChangesIntoContent( &$editContent ) {
2096
2097                 $db = wfGetDB( DB_MASTER );
2098
2099                 // This is the revision the editor started from
2100                 $baseRevision = $this->getBaseRevision();
2101                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2102
2103                 if ( is_null( $baseContent ) ) {
2104                         return false;
2105                 }
2106
2107                 // The current state, we want to merge updates into it
2108                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2109                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2110
2111                 if ( is_null( $currentContent ) ) {
2112                         return false;
2113                 }
2114
2115                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2116
2117                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2118
2119                 if ( $result ) {
2120                         $editContent = $result;
2121                         return true;
2122                 }
2123
2124                 return false;
2125         }
2126
2127         /**
2128          * @return Revision
2129          */
2130         function getBaseRevision() {
2131                 if ( !$this->mBaseRevision ) {
2132                         $db = wfGetDB( DB_MASTER );
2133                         $this->mBaseRevision = Revision::loadFromTimestamp(
2134                                 $db, $this->mTitle, $this->edittime );
2135                 }
2136                 return $this->mBaseRevision;
2137         }
2138
2139         /**
2140          * Check given input text against $wgSpamRegex, and return the text of the first match.
2141          *
2142          * @param string $text
2143          *
2144          * @return string|bool Matching string or false
2145          */
2146         public static function matchSpamRegex( $text ) {
2147                 global $wgSpamRegex;
2148                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2149                 $regexes = (array)$wgSpamRegex;
2150                 return self::matchSpamRegexInternal( $text, $regexes );
2151         }
2152
2153         /**
2154          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2155          *
2156          * @param string $text
2157          *
2158          * @return string|bool Matching string or false
2159          */
2160         public static function matchSummarySpamRegex( $text ) {
2161                 global $wgSummarySpamRegex;
2162                 $regexes = (array)$wgSummarySpamRegex;
2163                 return self::matchSpamRegexInternal( $text, $regexes );
2164         }
2165
2166         /**
2167          * @param string $text
2168          * @param array $regexes
2169          * @return bool|string
2170          */
2171         protected static function matchSpamRegexInternal( $text, $regexes ) {
2172                 foreach ( $regexes as $regex ) {
2173                         $matches = array();
2174                         if ( preg_match( $regex, $text, $matches ) ) {
2175                                 return $matches[0];
2176                         }
2177                 }
2178                 return false;
2179         }
2180
2181         function setHeaders() {
2182                 global $wgOut, $wgUser, $wgAjaxEditStash;
2183
2184                 $wgOut->addModules( 'mediawiki.action.edit' );
2185                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2186
2187                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2188                         // The addition of default buttons is handled by getEditToolbar() which
2189                         // has its own dependency on this module. The call here ensures the module
2190                         // is loaded in time (it has position "top") for other modules to register
2191                         // buttons (e.g. extensions, gadgets, user scripts).
2192                         $wgOut->addModules( 'mediawiki.toolbar' );
2193                 }
2194
2195                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2196                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2197                 }
2198
2199                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2200                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2201                 }
2202
2203                 if ( $wgAjaxEditStash ) {
2204                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2205                 }
2206
2207                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2208
2209                 # Enabled article-related sidebar, toplinks, etc.
2210                 $wgOut->setArticleRelated( true );
2211
2212                 $contextTitle = $this->getContextTitle();
2213                 if ( $this->isConflict ) {
2214                         $msg = 'editconflict';
2215                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2216                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2217                 } else {
2218                         $msg = $contextTitle->exists()
2219                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2220                                         && $contextTitle->getDefaultMessageText() !== false
2221                                 )
2222                                 ? 'editing'
2223                                 : 'creating';
2224                 }
2225
2226                 # Use the title defined by DISPLAYTITLE magic word when present
2227                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2228                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2229                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2230                 if ( $displayTitle === false ) {
2231                         $displayTitle = $contextTitle->getPrefixedText();
2232                 }
2233                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2234                 # Transmit the name of the message to JavaScript for live preview
2235                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2236                 $wgOut->addJsConfigVars( 'wgEditMessage', $msg );
2237         }
2238
2239         /**
2240          * Show all applicable editing introductions
2241          */
2242         protected function showIntro() {
2243                 global $wgOut, $wgUser;
2244                 if ( $this->suppressIntro ) {
2245                         return;
2246                 }
2247
2248                 $namespace = $this->mTitle->getNamespace();
2249
2250                 if ( $namespace == NS_MEDIAWIKI ) {
2251                         # Show a warning if editing an interface message
2252                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2253                         # If this is a default message (but not css or js),
2254                         # show a hint that it is translatable on translatewiki.net
2255                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2256                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2257                         ) {
2258                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2259                                 if ( $defaultMessageText !== false ) {
2260                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2261                                                 'translateinterface' );
2262                                 }
2263                         }
2264                 } elseif ( $namespace == NS_FILE ) {
2265                         # Show a hint to shared repo
2266                         $file = wfFindFile( $this->mTitle );
2267                         if ( $file && !$file->isLocal() ) {
2268                                 $descUrl = $file->getDescriptionUrl();
2269                                 # there must be a description url to show a hint to shared repo
2270                                 if ( $descUrl ) {
2271                                         if ( !$this->mTitle->exists() ) {
2272                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2273                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2274                                                 ) );
2275                                         } else {
2276                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2277                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2278                                                 ) );
2279                                         }
2280                                 }
2281                         }
2282                 }
2283
2284                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2285                 # Show log extract when the user is currently blocked
2286                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2287                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2288                         $username = $parts[0];
2289                         $user = User::newFromName( $username, false /* allow IP users*/ );
2290                         $ip = User::isIP( $username );
2291                         $block = Block::newFromTarget( $user, $user );
2292                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2293                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2294                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2295                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2296                                 # Show log extract if the user is currently blocked
2297                                 LogEventsList::showLogExtract(
2298                                         $wgOut,
2299                                         'block',
2300                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2301                                         '',
2302                                         array(
2303                                                 'lim' => 1,
2304                                                 'showIfEmpty' => false,
2305                                                 'msgKey' => array(
2306                                                         'blocked-notice-logextract',
2307                                                         $user->getName() # Support GENDER in notice
2308                                                 )
2309                                         )
2310                                 );
2311                         }
2312                 }
2313                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2314                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2315                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2316                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2317                         ) );
2318                         if ( $wgUser->isLoggedIn() ) {
2319                                 $wgOut->wrapWikiMsg(
2320                                         // Suppress the external link icon, consider the help url an internal one
2321                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2322                                         array(
2323                                                 'newarticletext',
2324                                                 $helpLink
2325                                         )
2326                                 );
2327                         } else {
2328                                 $wgOut->wrapWikiMsg(
2329                                         // Suppress the external link icon, consider the help url an internal one
2330                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2331                                         array(
2332                                                 'newarticletextanon',
2333                                                 $helpLink
2334                                         )
2335                                 );
2336                         }
2337                 }
2338                 # Give a notice if the user is editing a deleted/moved page...
2339                 if ( !$this->mTitle->exists() ) {
2340                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2341                                 '',
2342                                 array(
2343                                         'lim' => 10,
2344                                         'conds' => array( "log_action != 'revision'" ),
2345                                         'showIfEmpty' => false,
2346                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2347                                 )
2348                         );
2349                 }
2350         }
2351
2352         /**
2353          * Attempt to show a custom editing introduction, if supplied
2354          *
2355          * @return bool
2356          */
2357         protected function showCustomIntro() {
2358                 if ( $this->editintro ) {
2359                         $title = Title::newFromText( $this->editintro );
2360                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2361                                 global $wgOut;
2362                                 // Added using template syntax, to take <noinclude>'s into account.
2363                                 $wgOut->addWikiTextTitleTidy(
2364                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2365                                         $this->mTitle
2366                                 );
2367                                 return true;
2368                         }
2369                 }
2370                 return false;
2371         }
2372
2373         /**
2374          * Gets an editable textual representation of $content.
2375          * The textual representation can be turned by into a Content object by the
2376          * toEditContent() method.
2377          *
2378          * If $content is null or false or a string, $content is returned unchanged.
2379          *
2380          * If the given Content object is not of a type that can be edited using
2381          * the text base EditPage, an exception will be raised. Set
2382          * $this->allowNonTextContent to true to allow editing of non-textual
2383          * content.
2384          *
2385          * @param Content|null|bool|string $content
2386          * @return string The editable text form of the content.
2387          *
2388          * @throws MWException If $content is not an instance of TextContent and
2389          *   $this->allowNonTextContent is not true.
2390          */
2391         protected function toEditText( $content ) {
2392                 if ( $content === null || $content === false || is_string( $content ) ) {
2393                         return $content;
2394                 }
2395
2396                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2397                         throw new MWException( 'This content model is not supported: '
2398                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2399                 }
2400
2401                 return $content->serialize( $this->contentFormat );
2402         }
2403
2404         /**
2405          * Turns the given text into a Content object by unserializing it.
2406          *
2407          * If the resulting Content object is not of a type that can be edited using
2408          * the text base EditPage, an exception will be raised. Set
2409          * $this->allowNonTextContent to true to allow editing of non-textual
2410          * content.
2411          *
2412          * @param string|null|bool $text Text to unserialize
2413          * @return Content The content object created from $text. If $text was false
2414          *   or null, false resp. null will be  returned instead.
2415          *
2416          * @throws MWException If unserializing the text results in a Content
2417          *   object that is not an instance of TextContent and
2418          *   $this->allowNonTextContent is not true.
2419          */
2420         protected function toEditContent( $text ) {
2421                 if ( $text === false || $text === null ) {
2422                         return $text;
2423                 }
2424
2425                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2426                         $this->contentModel, $this->contentFormat );
2427
2428                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2429                         throw new MWException( 'This content model is not supported: '
2430                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2431                 }
2432
2433                 return $content;
2434         }
2435
2436         /**
2437          * Send the edit form and related headers to $wgOut
2438          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2439          *     during form output near the top, for captchas and the like.
2440          *
2441          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2442          * use the EditPage::showEditForm:fields hook instead.
2443          */
2444         function showEditForm( $formCallback = null ) {
2445                 global $wgOut, $wgUser;
2446
2447                 # need to parse the preview early so that we know which templates are used,
2448                 # otherwise users with "show preview after edit box" will get a blank list
2449                 # we parse this near the beginning so that setHeaders can do the title
2450                 # setting work instead of leaving it in getPreviewText
2451                 $previewOutput = '';
2452                 if ( $this->formtype == 'preview' ) {
2453                         $previewOutput = $this->getPreviewText();
2454                 }
2455
2456                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2457
2458                 $this->setHeaders();
2459
2460                 if ( $this->showHeader() === false ) {
2461                         return;
2462                 }
2463
2464                 $wgOut->addHTML( $this->editFormPageTop );
2465
2466                 if ( $wgUser->getOption( 'previewontop' ) ) {
2467                         $this->displayPreviewArea( $previewOutput, true );
2468                 }
2469
2470                 $wgOut->addHTML( $this->editFormTextTop );
2471
2472                 $showToolbar = true;
2473                 if ( $this->wasDeletedSinceLastEdit() ) {
2474                         if ( $this->formtype == 'save' ) {
2475                                 // Hide the toolbar and edit area, user can click preview to get it back
2476                                 // Add an confirmation checkbox and explanation.
2477                                 $showToolbar = false;
2478                         } else {
2479                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2480                                         'deletedwhileediting' );
2481                         }
2482                 }
2483
2484                 // @todo add EditForm plugin interface and use it here!
2485                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2486                 $wgOut->addHTML( Html::openElement(
2487                         'form',
2488                         array(
2489                                 'id' => self::EDITFORM_ID,
2490                                 'name' => self::EDITFORM_ID,
2491                                 'method' => 'post',
2492                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2493                                 'enctype' => 'multipart/form-data'
2494                         )
2495                 ) );
2496
2497                 if ( is_callable( $formCallback ) ) {
2498                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2499                         call_user_func_array( $formCallback, array( &$wgOut ) );
2500                 }
2501
2502                 // Add an empty field to trip up spambots
2503                 $wgOut->addHTML(
2504                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2505                         . Html::rawElement(
2506                                 'label',
2507                                 array( 'for' => 'wpAntiSpam' ),
2508                                 wfMessage( 'simpleantispam-label' )->parse()
2509                         )
2510                         . Xml::element(
2511                                 'input',
2512                                 array(
2513                                         'type' => 'text',
2514                                         'name' => 'wpAntispam',
2515                                         'id' => 'wpAntispam',
2516                                         'value' => ''
2517                                 )
2518                         )
2519                         . Xml::closeElement( 'div' )
2520                 );
2521
2522                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2523
2524                 // Put these up at the top to ensure they aren't lost on early form submission
2525                 $this->showFormBeforeText();
2526
2527                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2528                         $username = $this->lastDelete->user_name;
2529                         $comment = $this->lastDelete->log_comment;
2530
2531                         // It is better to not parse the comment at all than to have templates expanded in the middle
2532                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2533                         $key = $comment === ''
2534                                 ? 'confirmrecreate-noreason'
2535                                 : 'confirmrecreate';
2536                         $wgOut->addHTML(
2537                                 '<div class="mw-confirm-recreate">' .
2538                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2539                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2540                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2541                                 ) .
2542                                 '</div>'
2543                         );
2544                 }
2545
2546                 # When the summary is hidden, also hide them on preview/show changes
2547                 if ( $this->nosummary ) {
2548                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2549                 }
2550
2551                 # If a blank edit summary was previously provided, and the appropriate
2552                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2553                 # user being bounced back more than once in the event that a summary
2554                 # is not required.
2555                 # ####
2556                 # For a bit more sophisticated detection of blank summaries, hash the
2557                 # automatic one and pass that in the hidden field wpAutoSummary.
2558                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2559                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2560                 }
2561
2562                 if ( $this->undidRev ) {
2563                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2564                 }
2565
2566                 if ( $this->selfRedirect ) {
2567                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2568                 }
2569
2570                 if ( $this->hasPresetSummary ) {
2571                         // If a summary has been preset using &summary= we don't want to prompt for
2572                         // a different summary. Only prompt for a summary if the summary is blanked.
2573                         // (Bug 17416)
2574                         $this->autoSumm = md5( '' );
2575                 }
2576
2577                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2578                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2579
2580                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2581                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2582                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2583
2584                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2585                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2586
2587                 if ( $this->section == 'new' ) {
2588                         $this->showSummaryInput( true, $this->summary );
2589                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2590                 }
2591
2592                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2593
2594                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2595                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2596                 }
2597
2598                 if ( $this->blankArticle ) {
2599                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2600                 }
2601
2602                 if ( $this->isConflict ) {
2603                         // In an edit conflict bypass the overridable content form method
2604                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2605                         // resolved between page source edits and custom ui edits using the
2606                         // custom edit ui.
2607                         $this->textbox2 = $this->textbox1;
2608
2609                         $content = $this->getCurrentContent();
2610                         $this->textbox1 = $this->toEditText( $content );
2611
2612                         $this->showTextbox1();
2613                 } else {
2614                         $this->showContentForm();
2615                 }
2616
2617                 $wgOut->addHTML( $this->editFormTextAfterContent );
2618
2619                 $this->showStandardInputs();
2620
2621                 $this->showFormAfterText();
2622
2623                 $this->showTosSummary();
2624
2625                 $this->showEditTools();
2626
2627                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2628
2629                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2630                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2631
2632                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2633                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2634
2635                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2636                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2637
2638                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2639
2640                 if ( $this->isConflict ) {
2641                         try {
2642                                 $this->showConflict();
2643                         } catch ( MWContentSerializationException $ex ) {
2644                                 // this can't really happen, but be nice if it does.
2645                                 $msg = wfMessage(
2646                                         'content-failed-to-parse',
2647                                         $this->contentModel,
2648                                         $this->contentFormat,
2649                                         $ex->getMessage()
2650                                 );
2651                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2652                         }
2653                 }
2654
2655                 // Marker for detecting truncated form data.  This must be the last
2656                 // parameter sent in order to be of use, so do not move me.
2657                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2658                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2659
2660                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2661                         $this->displayPreviewArea( $previewOutput, false );
2662                 }
2663
2664         }
2665
2666         /**
2667          * Extract the section title from current section text, if any.
2668          *
2669          * @param string $text
2670          * @return string|bool String or false
2671          */
2672         public static function extractSectionTitle( $text ) {
2673                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2674                 if ( !empty( $matches[2] ) ) {
2675                         global $wgParser;
2676                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2677                 } else {
2678                         return false;
2679                 }
2680         }
2681
2682         /**
2683          * @return bool
2684          */
2685         protected function showHeader() {
2686                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2687                 global $wgAllowUserCss, $wgAllowUserJs;
2688
2689                 if ( $this->mTitle->isTalkPage() ) {
2690                         $wgOut->addWikiMsg( 'talkpagetext' );
2691                 }
2692
2693                 // Add edit notices
2694                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
2695                 if ( count( $editNotices ) ) {
2696                         $wgOut->addHTML( implode( "\n", $editNotices ) );
2697                 } else {
2698                         $msg = wfMessage( 'editnotice-notext' );
2699                         if ( !$msg->isDisabled() ) {
2700                                 $wgOut->addHTML(
2701                                         '<div class="mw-editnotice-notext">'
2702                                         . $msg->parseAsBlock()
2703                                         . '</div>'
2704                                 );
2705                         }
2706                 }
2707
2708                 if ( $this->isConflict ) {
2709                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2710                         $this->edittime = $this->mArticle->getTimestamp();
2711                 } else {
2712                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2713                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2714                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2715                                 // Someone is welcome to try refactoring though
2716                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2717                                 return false;
2718                         }
2719
2720                         if ( $this->section != '' && $this->section != 'new' ) {
2721                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2722                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2723                                         if ( $sectionTitle !== false ) {
2724                                                 $this->summary = "/* $sectionTitle */ ";
2725                                         }
2726                                 }
2727                         }
2728
2729                         if ( $this->missingComment ) {
2730                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2731                         }
2732
2733                         if ( $this->missingSummary && $this->section != 'new' ) {
2734                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2735                         }
2736
2737                         if ( $this->missingSummary && $this->section == 'new' ) {
2738                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2739                         }
2740
2741                         if ( $this->blankArticle ) {
2742                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2743                         }
2744
2745                         if ( $this->selfRedirect ) {
2746                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2747                         }
2748
2749                         if ( $this->hookError !== '' ) {
2750                                 $wgOut->addWikiText( $this->hookError );
2751                         }
2752
2753                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2754                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2755                         }
2756
2757                         if ( $this->section != 'new' ) {
2758                                 $revision = $this->mArticle->getRevisionFetched();
2759                                 if ( $revision ) {
2760                                         // Let sysop know that this will make private content public if saved
2761
2762                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2763                                                 $wgOut->wrapWikiMsg(
2764                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2765                                                         'rev-deleted-text-permission'
2766                                                 );
2767                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2768                                                 $wgOut->wrapWikiMsg(
2769                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2770                                                         'rev-deleted-text-view'
2771                                                 );
2772                                         }
2773
2774                                         if ( !$revision->isCurrent() ) {
2775                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2776                                                 $wgOut->addWikiMsg( 'editingold' );
2777                                         }
2778                                 } elseif ( $this->mTitle->exists() ) {
2779                                         // Something went wrong
2780
2781                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2782                                                 array( 'missing-revision', $this->oldid ) );
2783                                 }
2784                         }
2785                 }
2786
2787                 if ( wfReadOnly() ) {
2788                         $wgOut->wrapWikiMsg(
2789                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2790                                 array( 'readonlywarning', wfReadOnlyReason() )
2791                         );
2792                 } elseif ( $wgUser->isAnon() ) {
2793                         if ( $this->formtype != 'preview' ) {
2794                                 $wgOut->wrapWikiMsg(
2795                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2796                                         array( 'anoneditwarning',
2797                                                 // Log-in link
2798                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2799                                                 // Sign-up link
2800                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2801                                 );
2802                         } else {
2803                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2804                                         'anonpreviewwarning'
2805                                 );
2806                         }
2807                 } else {
2808                         if ( $this->isCssJsSubpage ) {
2809                                 # Check the skin exists
2810                                 if ( $this->isWrongCaseCssJsPage ) {
2811                                         $wgOut->wrapWikiMsg(
2812                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2813                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2814                                         );
2815                                 }
2816                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2817                                         if ( $this->formtype !== 'preview' ) {
2818                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2819                                                         $wgOut->wrapWikiMsg(
2820                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2821                                                                 array( 'usercssyoucanpreview' )
2822                                                         );
2823                                                 }
2824
2825                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
2826                                                         $wgOut->wrapWikiMsg(
2827                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2828                                                                 array( 'userjsyoucanpreview' )
2829                                                         );
2830                                                 }
2831                                         }
2832                                 }
2833                         }
2834                 }
2835
2836                 if ( $this->mTitle->isProtected( 'edit' ) &&
2837                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2838                 ) {
2839                         # Is the title semi-protected?
2840                         if ( $this->mTitle->isSemiProtected() ) {
2841                                 $noticeMsg = 'semiprotectedpagewarning';
2842                         } else {
2843                                 # Then it must be protected based on static groups (regular)
2844                                 $noticeMsg = 'protectedpagewarning';
2845                         }
2846                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2847                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2848                 }
2849                 if ( $this->mTitle->isCascadeProtected() ) {
2850                         # Is this page under cascading protection from some source pages?
2851                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2852                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2853                         $cascadeSourcesCount = count( $cascadeSources );
2854                         if ( $cascadeSourcesCount > 0 ) {
2855                                 # Explain, and list the titles responsible
2856                                 foreach ( $cascadeSources as $page ) {
2857                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2858                                 }
2859                         }
2860                         $notice .= '</div>';
2861                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2862                 }
2863                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2864                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2865                                 array( 'lim' => 1,
2866                                         'showIfEmpty' => false,
2867                                         'msgKey' => array( 'titleprotectedwarning' ),
2868                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2869                 }
2870
2871                 if ( $this->kblength === false ) {
2872                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2873                 }
2874
2875                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2876                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2877                                 array(
2878                                         'longpageerror',
2879                                         $wgLang->formatNum( $this->kblength ),
2880                                         $wgLang->formatNum( $wgMaxArticleSize )
2881                                 )
2882                         );
2883                 } else {
2884                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2885                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2886                                         array(
2887                                                 'longpage-hint',
2888                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2889                                                 strlen( $this->textbox1 )
2890                                         )
2891                                 );
2892                         }
2893                 }
2894                 # Add header copyright warning
2895                 $this->showHeaderCopyrightWarning();
2896
2897                 return true;
2898         }
2899
2900         /**
2901          * Standard summary input and label (wgSummary), abstracted so EditPage
2902          * subclasses may reorganize the form.
2903          * Note that you do not need to worry about the label's for=, it will be
2904          * inferred by the id given to the input. You can remove them both by
2905          * passing array( 'id' => false ) to $userInputAttrs.
2906          *
2907          * @param string $summary The value of the summary input
2908          * @param string $labelText The html to place inside the label
2909          * @param array $inputAttrs Array of attrs to use on the input
2910          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2911          *
2912          * @return array An array in the format array( $label, $input )
2913          */
2914         function getSummaryInput( $summary = "", $labelText = null,
2915                 $inputAttrs = null, $spanLabelAttrs = null
2916         ) {
2917                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2918                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2919                         'id' => 'wpSummary',
2920                         'maxlength' => '200',
2921                         'tabindex' => '1',
2922                         'size' => 60,
2923                         'spellcheck' => 'true',
2924                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2925
2926                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2927                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2928                         'id' => "wpSummaryLabel"
2929                 );
2930
2931                 $label = null;
2932                 if ( $labelText ) {
2933                         $label = Xml::tags(
2934                                 'label',
2935                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2936                                 $labelText
2937                         );
2938                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2939                 }
2940
2941                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2942
2943                 return array( $label, $input );
2944         }
2945
2946         /**
2947          * @param bool $isSubjectPreview True if this is the section subject/title
2948          *   up top, or false if this is the comment summary
2949          *   down below the textarea
2950          * @param string $summary The text of the summary to display
2951          */
2952         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2953                 global $wgOut, $wgContLang;
2954                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2955                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2956                 if ( $isSubjectPreview ) {
2957                         if ( $this->nosummary ) {
2958                                 return;
2959                         }
2960                 } else {
2961                         if ( !$this->mShowSummaryField ) {
2962                                 return;
2963                         }
2964                 }
2965                 $summary = $wgContLang->recodeForEdit( $summary );
2966                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2967                 list( $label, $input ) = $this->getSummaryInput(
2968                         $summary,
2969                         $labelText,
2970                         array( 'class' => $summaryClass ),
2971                         array()
2972                 );
2973                 $wgOut->addHTML( "{$label} {$input}" );
2974         }
2975
2976         /**
2977          * @param bool $isSubjectPreview True if this is the section subject/title
2978          *   up top, or false if this is the comment summary
2979          *   down below the textarea
2980          * @param string $summary The text of the summary to display
2981          * @return string
2982          */
2983         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2984                 // avoid spaces in preview, gets always trimmed on save
2985                 $summary = trim( $summary );
2986                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2987                         return "";
2988                 }
2989
2990                 global $wgParser;
2991
2992                 if ( $isSubjectPreview ) {
2993                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2994                                 ->inContentLanguage()->text();
2995                 }
2996
2997                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2998
2999                 $summary = wfMessage( $message )->parse()
3000                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3001                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
3002         }
3003
3004         protected function showFormBeforeText() {
3005                 global $wgOut;
3006                 $section = htmlspecialchars( $this->section );
3007                 $wgOut->addHTML( <<<HTML
3008 <input type='hidden' value="{$section}" name="wpSection"/>
3009 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3010 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3011 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3012
3013 HTML
3014                 );
3015                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3016                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3017                 }
3018         }
3019
3020         protected function showFormAfterText() {
3021                 global $wgOut, $wgUser;
3022                 /**
3023                  * To make it harder for someone to slip a user a page
3024                  * which submits an edit form to the wiki without their
3025                  * knowledge, a random token is associated with the login
3026                  * session. If it's not passed back with the submission,
3027                  * we won't save the page, or render user JavaScript and
3028                  * CSS previews.
3029                  *
3030                  * For anon editors, who may not have a session, we just
3031                  * include the constant suffix to prevent editing from
3032                  * broken text-mangling proxies.
3033                  */
3034                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3035         }
3036
3037         /**
3038          * Subpage overridable method for printing the form for page content editing
3039          * By default this simply outputs wpTextbox1
3040          * Subclasses can override this to provide a custom UI for editing;
3041          * be it a form, or simply wpTextbox1 with a modified content that will be
3042          * reverse modified when extracted from the post data.
3043          * Note that this is basically the inverse for importContentFormData
3044          */
3045         protected function showContentForm() {
3046                 $this->showTextbox1();
3047         }
3048
3049         /**
3050          * Method to output wpTextbox1
3051          * The $textoverride method can be used by subclasses overriding showContentForm
3052          * to pass back to this method.
3053          *
3054          * @param array $customAttribs Array of html attributes to use in the textarea
3055          * @param string $textoverride Optional text to override $this->textarea1 with
3056          */
3057         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3058                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3059                         $attribs = array( 'style' => 'display:none;' );
3060                 } else {
3061                         $classes = array(); // Textarea CSS
3062                         if ( $this->mTitle->isProtected( 'edit' ) &&
3063                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
3064                         ) {
3065                                 # Is the title semi-protected?
3066                                 if ( $this->mTitle->isSemiProtected() ) {
3067                                         $classes[] = 'mw-textarea-sprotected';
3068                                 } else {
3069                                         # Then it must be protected based on static groups (regular)
3070                                         $classes[] = 'mw-textarea-protected';
3071                                 }
3072                                 # Is the title cascade-protected?
3073                                 if ( $this->mTitle->isCascadeProtected() ) {
3074                                         $classes[] = 'mw-textarea-cprotected';
3075                                 }
3076                         }
3077
3078                         $attribs = array( 'tabindex' => 1 );
3079
3080                         if ( is_array( $customAttribs ) ) {
3081                                 $attribs += $customAttribs;
3082                         }
3083
3084                         if ( count( $classes ) ) {
3085                                 if ( isset( $attribs['class'] ) ) {
3086                                         $classes[] = $attribs['class'];
3087                                 }
3088                                 $attribs['class'] = implode( ' ', $classes );
3089                         }
3090                 }
3091
3092                 $this->showTextbox(
3093                         $textoverride !== null ? $textoverride : $this->textbox1,
3094                         'wpTextbox1',
3095                         $attribs
3096                 );
3097         }
3098
3099         protected function showTextbox2() {
3100                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
3101         }
3102
3103         protected function showTextbox( $text, $name, $customAttribs = array() ) {
3104                 global $wgOut, $wgUser;
3105
3106                 $wikitext = $this->safeUnicodeOutput( $text );
3107                 if ( strval( $wikitext ) !== '' ) {
3108                         // Ensure there's a newline at the end, otherwise adding lines
3109                         // is awkward.
3110                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3111                         // mode will show an extra newline. A bit annoying.
3112                         $wikitext .= "\n";
3113                 }
3114
3115                 $attribs = $customAttribs + array(
3116                         'accesskey' => ',',
3117                         'id' => $name,
3118                         'cols' => $wgUser->getIntOption( 'cols' ),
3119                         'rows' => $wgUser->getIntOption( 'rows' ),
3120                         // Avoid PHP notices when appending preferences
3121                         // (appending allows customAttribs['style'] to still work).
3122                         'style' => ''
3123                 );
3124
3125                 $pageLang = $this->mTitle->getPageLanguage();
3126                 $attribs['lang'] = $pageLang->getHtmlCode();
3127                 $attribs['dir'] = $pageLang->getDir();
3128
3129                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3130         }
3131
3132         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3133                 global $wgOut;
3134                 $classes = array();
3135                 if ( $isOnTop ) {
3136                         $classes[] = 'ontop';
3137                 }
3138
3139                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3140
3141                 if ( $this->formtype != 'preview' ) {
3142                         $attribs['style'] = 'display: none;';
3143                 }
3144
3145                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3146
3147                 if ( $this->formtype == 'preview' ) {
3148                         $this->showPreview( $previewOutput );
3149                 } else {
3150                         // Empty content container for LivePreview
3151                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3152                         $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3153                                 'class' => 'mw-content-' . $pageViewLang->getDir() );
3154                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3155                 }
3156
3157                 $wgOut->addHTML( '</div>' );
3158
3159                 if ( $this->formtype == 'diff' ) {
3160                         try {
3161                                 $this->showDiff();
3162                         } catch ( MWContentSerializationException $ex ) {
3163                                 $msg = wfMessage(
3164                                         'content-failed-to-parse',
3165                                         $this->contentModel,
3166                                         $this->contentFormat,
3167                                         $ex->getMessage()
3168                                 );
3169                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3170                         }
3171                 }
3172         }
3173
3174         /**
3175          * Append preview output to $wgOut.
3176          * Includes category rendering if this is a category page.
3177          *
3178          * @param string $text The HTML to be output for the preview.
3179          */
3180         protected function showPreview( $text ) {
3181                 global $wgOut;
3182                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3183                         $this->mArticle->openShowCategory();
3184                 }
3185                 # This hook seems slightly odd here, but makes things more
3186                 # consistent for extensions.
3187                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3188                 $wgOut->addHTML( $text );
3189                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3190                         $this->mArticle->closeShowCategory();
3191                 }
3192         }
3193
3194         /**
3195          * Get a diff between the current contents of the edit box and the
3196          * version of the page we're editing from.
3197          *
3198          * If this is a section edit, we'll replace the section as for final
3199          * save and then make a comparison.
3200          */
3201         function showDiff() {
3202                 global $wgUser, $wgContLang, $wgOut;
3203
3204                 $oldtitlemsg = 'currentrev';
3205                 # if message does not exist, show diff against the preloaded default
3206                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3207                         $oldtext = $this->mTitle->getDefaultMessageText();
3208                         if ( $oldtext !== false ) {
3209                                 $oldtitlemsg = 'defaultmessagetext';
3210                                 $oldContent = $this->toEditContent( $oldtext );
3211                         } else {
3212                                 $oldContent = null;
3213                         }
3214                 } else {
3215                         $oldContent = $this->getCurrentContent();
3216                 }
3217
3218                 $textboxContent = $this->toEditContent( $this->textbox1 );
3219
3220                 $newContent = $this->mArticle->replaceSectionContent(
3221                                                         $this->section, $textboxContent,
3222                                                         $this->summary, $this->edittime );
3223
3224                 if ( $newContent ) {
3225                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3226                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3227
3228                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3229                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3230                 }
3231
3232                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3233                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3234                         $newtitle = wfMessage( 'yourtext' )->parse();
3235
3236                         if ( !$oldContent ) {
3237                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3238                         }
3239
3240                         if ( !$newContent ) {
3241                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3242                         }
3243
3244                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3245                         $de->setContent( $oldContent, $newContent );
3246
3247                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3248                         $de->showDiffStyle();
3249                 } else {
3250                         $difftext = '';
3251                 }
3252
3253                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3254         }
3255
3256         /**
3257          * Show the header copyright warning.
3258          */
3259         protected function showHeaderCopyrightWarning() {
3260                 $msg = 'editpage-head-copy-warn';
3261                 if ( !wfMessage( $msg )->isDisabled() ) {
3262                         global $wgOut;
3263                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3264                                 'editpage-head-copy-warn' );
3265                 }
3266         }
3267
3268         /**
3269          * Give a chance for site and per-namespace customizations of
3270          * terms of service summary link that might exist separately
3271          * from the copyright notice.
3272          *
3273          * This will display between the save button and the edit tools,
3274          * so should remain short!
3275          */
3276         protected function showTosSummary() {
3277                 $msg = 'editpage-tos-summary';
3278                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3279                 if ( !wfMessage( $msg )->isDisabled() ) {
3280                         global $wgOut;
3281                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3282                         $wgOut->addWikiMsg( $msg );
3283                         $wgOut->addHTML( '</div>' );
3284                 }
3285         }
3286
3287         protected function showEditTools() {
3288                 global $wgOut;
3289                 $wgOut->addHTML( '<div class="mw-editTools">' .
3290                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3291                         '</div>' );
3292         }
3293
3294         /**
3295          * Get the copyright warning
3296          *
3297          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3298          * @return string
3299          */
3300         protected function getCopywarn() {
3301                 return self::getCopyrightWarning( $this->mTitle );
3302         }
3303
3304         /**
3305          * Get the copyright warning, by default returns wikitext
3306          *
3307          * @param Title $title
3308          * @param string $format Output format, valid values are any function of a Message object
3309          * @return string
3310          */
3311         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3312                 global $wgRightsText;
3313                 if ( $wgRightsText ) {
3314                         $copywarnMsg = array( 'copyrightwarning',
3315                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3316                                 $wgRightsText );
3317                 } else {
3318                         $copywarnMsg = array( 'copyrightwarning2',
3319                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3320                 }
3321                 // Allow for site and per-namespace customization of contribution/copyright notice.
3322                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3323
3324                 return "<div id=\"editpage-copywarn\">\n" .
3325                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3326         }
3327
3328         /**
3329          * Get the Limit report for page previews
3330          *
3331          * @since 1.22
3332          * @param ParserOutput $output ParserOutput object from the parse
3333          * @return string HTML
3334          */
3335         public static function getPreviewLimitReport( $output ) {
3336                 if ( !$output || !$output->getLimitReportData() ) {
3337                         return '';
3338                 }
3339
3340                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3341                         wfMessage( 'limitreport-title' )->parseAsBlock()
3342                 );
3343
3344                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3345                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3346
3347                 $limitReport .= Html::openElement( 'table', array(
3348                         'class' => 'preview-limit-report wikitable'
3349                 ) ) .
3350                         Html::openElement( 'tbody' );
3351
3352                 foreach ( $output->getLimitReportData() as $key => $value ) {
3353                         if ( Hooks::run( 'ParserLimitReportFormat',
3354                                 array( $key, &$value, &$limitReport, true, true )
3355                         ) ) {
3356                                 $keyMsg = wfMessage( $key );
3357                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3358                                 if ( !$valueMsg->exists() ) {
3359                                         $valueMsg = new RawMessage( '$1' );
3360                                 }
3361                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3362                                         $limitReport .= Html::openElement( 'tr' ) .
3363                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3364                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3365                                                 Html::closeElement( 'tr' );
3366                                 }
3367                         }
3368                 }
3369
3370                 $limitReport .= Html::closeElement( 'tbody' ) .
3371                         Html::closeElement( 'table' ) .
3372                         Html::closeElement( 'div' );
3373
3374                 return $limitReport;
3375         }
3376
3377         protected function showStandardInputs( &$tabindex = 2 ) {
3378                 global $wgOut;
3379                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3380
3381                 if ( $this->section != 'new' ) {
3382                         $this->showSummaryInput( false, $this->summary );
3383                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3384                 }
3385
3386                 $checkboxes = $this->getCheckboxes( $tabindex,
3387                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3388                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3389
3390                 // Show copyright warning.
3391                 $wgOut->addWikiText( $this->getCopywarn() );
3392                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3393
3394                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3395                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3396
3397                 $cancel = $this->getCancelLink();
3398                 if ( $cancel !== '' ) {
3399                         $cancel .= Html::element( 'span',
3400                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3401                                 wfMessage( 'pipe-separator' )->text() );
3402                 }
3403
3404                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3405                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3406                 $attrs = array(
3407                         'target' => 'helpwindow',
3408                         'href' => $edithelpurl,
3409                 );
3410                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3411                         $attrs, array( 'mw-ui-quiet' ) ) .
3412                         wfMessage( 'word-separator' )->escaped() .
3413                         wfMessage( 'newwindow' )->parse();
3414
3415                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3416                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3417                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3418
3419                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3420
3421                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3422         }
3423
3424         /**
3425          * Show an edit conflict. textbox1 is already shown in showEditForm().
3426          * If you want to use another entry point to this function, be careful.
3427          */
3428         protected function showConflict() {
3429                 global $wgOut;
3430
3431                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3432                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3433
3434                         $content1 = $this->toEditContent( $this->textbox1 );
3435                         $content2 = $this->toEditContent( $this->textbox2 );
3436
3437                         $handler = ContentHandler::getForModelID( $this->contentModel );
3438                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3439                         $de->setContent( $content2, $content1 );
3440                         $de->showDiff(
3441                                 wfMessage( 'yourtext' )->parse(),
3442                                 wfMessage( 'storedversion' )->text()
3443                         );
3444
3445                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3446                         $this->showTextbox2();
3447                 }
3448         }
3449
3450         /**
3451          * @return string
3452          */
3453         public function getCancelLink() {
3454                 $cancelParams = array();
3455                 if ( !$this->isConflict && $this->oldid > 0 ) {
3456                         $cancelParams['oldid'] = $this->oldid;
3457                 }
3458                 $attrs = array( 'id' => 'mw-editform-cancel' );
3459
3460                 return Linker::linkKnown(
3461                         $this->getContextTitle(),
3462                         wfMessage( 'cancel' )->parse(),
3463                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3464                         $cancelParams
3465                 );
3466         }
3467
3468         /**
3469          * Returns the URL to use in the form's action attribute.
3470          * This is used by EditPage subclasses when simply customizing the action
3471          * variable in the constructor is not enough. This can be used when the
3472          * EditPage lives inside of a Special page rather than a custom page action.
3473          *
3474          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3475          * @return string
3476          */
3477         protected function getActionURL( Title $title ) {
3478                 return $title->getLocalURL( array( 'action' => $this->action ) );
3479         }
3480
3481         /**
3482          * Check if a page was deleted while the user was editing it, before submit.
3483          * Note that we rely on the logging table, which hasn't been always there,
3484          * but that doesn't matter, because this only applies to brand new
3485          * deletes.
3486          * @return bool
3487          */
3488         protected function wasDeletedSinceLastEdit() {
3489                 if ( $this->deletedSinceEdit !== null ) {
3490                         return $this->deletedSinceEdit;
3491                 }
3492
3493                 $this->deletedSinceEdit = false;
3494
3495                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3496                         $this->lastDelete = $this->getLastDelete();
3497                         if ( $this->lastDelete ) {
3498                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3499                                 if ( $deleteTime > $this->starttime ) {
3500                                         $this->deletedSinceEdit = true;
3501                                 }
3502                         }
3503                 }
3504
3505                 return $this->deletedSinceEdit;
3506         }
3507
3508         /**
3509          * @return bool|stdClass
3510          */
3511         protected function getLastDelete() {
3512                 $dbr = wfGetDB( DB_SLAVE );
3513                 $data = $dbr->selectRow(
3514                         array( 'logging', 'user' ),
3515                         array(
3516                                 'log_type',
3517                                 'log_action',
3518                                 'log_timestamp',
3519                                 'log_user',
3520                                 'log_namespace',
3521                                 'log_title',
3522                                 'log_comment',
3523                                 'log_params',
3524                                 'log_deleted',
3525                                 'user_name'
3526                         ), array(
3527                                 'log_namespace' => $this->mTitle->getNamespace(),
3528                                 'log_title' => $this->mTitle->getDBkey(),
3529                                 'log_type' => 'delete',
3530                                 'log_action' => 'delete',
3531                                 'user_id=log_user'
3532                         ),
3533                         __METHOD__,
3534                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3535                 );
3536                 // Quick paranoid permission checks...
3537                 if ( is_object( $data ) ) {
3538                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3539                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3540                         }
3541
3542                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3543                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3544                         }
3545                 }
3546
3547                 return $data;
3548         }
3549
3550         /**
3551          * Get the rendered text for previewing.
3552          * @throws MWException
3553          * @return string
3554          */
3555         function getPreviewText() {
3556                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3557                 global $wgAllowUserCss, $wgAllowUserJs;
3558
3559                 $stats = $wgOut->getContext()->getStats();
3560
3561                 if ( $wgRawHtml && !$this->mTokenOk ) {
3562                         // Could be an offsite preview attempt. This is very unsafe if
3563                         // HTML is enabled, as it could be an attack.
3564                         $parsedNote = '';
3565                         if ( $this->textbox1 !== '' ) {
3566                                 // Do not put big scary notice, if previewing the empty
3567                                 // string, which happens when you initially edit
3568                                 // a category page, due to automatic preview-on-open.
3569                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3570                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3571                         }
3572                         $stats->increment( 'edit.failures.session_loss' );
3573                         return $parsedNote;
3574                 }
3575
3576                 $note = '';
3577
3578                 try {
3579                         $content = $this->toEditContent( $this->textbox1 );
3580
3581                         $previewHTML = '';
3582                         if ( !Hooks::run(
3583                                 'AlternateEditPreview',
3584                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3585                         ) {
3586                                 return $previewHTML;
3587                         }
3588
3589                         # provide a anchor link to the editform
3590                         $continueEditing = '<span class="mw-continue-editing">' .
3591                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3592                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3593                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3594                                 if ( $this->mTokenOkExceptSuffix ) {
3595                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3596                                         $stats->increment( 'edit.failures.bad_token' );
3597                                 } else {
3598                                         $note = wfMessage( 'session_fail_preview' )->plain();
3599                                         $stats->increment( 'edit.failures.session_loss' );
3600                                 }
3601                         } elseif ( $this->incompleteForm ) {
3602                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3603                                 if ( $this->mTriedSave ) {
3604                                         $stats->increment( 'edit.failures.incomplete_form' );
3605                                 }
3606                         } else {
3607                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3608                         }
3609
3610                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3611                         $parserOptions->setIsPreview( true );
3612                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3613
3614                         # don't parse non-wikitext pages, show message about preview
3615                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3616                                 if ( $this->mTitle->isCssJsSubpage() ) {
3617                                         $level = 'user';
3618                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3619                                         $level = 'site';
3620                                 } else {
3621                                         $level = false;
3622                                 }
3623
3624                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3625                                         $format = 'css';
3626                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3627                                                 $format = false;
3628                                         }
3629                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3630                                         $format = 'js';
3631                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3632                                                 $format = false;
3633                                         }
3634                                 } else {
3635                                         $format = false;
3636                                 }
3637
3638                                 # Used messages to make sure grep find them:
3639                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3640                                 if ( $level && $format ) {
3641                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3642                                                 wfMessage( "{$level}{$format}preview" )->text() .
3643                                                 ' ' . $continueEditing . "</div>";
3644                                 }
3645                         }
3646
3647                         # If we're adding a comment, we need to show the
3648                         # summary as the headline
3649                         if ( $this->section === "new" && $this->summary !== "" ) {
3650                                 $content = $content->addSectionHeader( $this->summary );
3651                         }
3652
3653                         $hook_args = array( $this, &$content );
3654                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3655                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3656
3657                         $parserOptions->enableLimitReport();
3658
3659                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3660                         # But it's now deprecated, so never mind
3661
3662                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3663                         $scopedCallback = $parserOptions->setupFakeRevision(
3664                                 $this->mTitle, $pstContent, $wgUser );
3665                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3666
3667                         # Try to stash the edit for the final submission step
3668                         # @todo: different date format preferences cause cache misses
3669                         ApiStashEdit::stashEditFromPreview(
3670                                 $this->getArticle(), $content, $pstContent,
3671                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3672                         );
3673
3674                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3675                         $previewHTML = $parserOutput->getText();
3676                         $this->mParserOutput = $parserOutput;
3677                         $wgOut->addParserOutputMetadata( $parserOutput );
3678
3679                         if ( count( $parserOutput->getWarnings() ) ) {
3680                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3681                         }
3682                 } catch ( MWContentSerializationException $ex ) {
3683                         $m = wfMessage(
3684                                 'content-failed-to-parse',
3685                                 $this->contentModel,
3686                                 $this->contentFormat,
3687                                 $ex->getMessage()
3688                         );
3689                         $note .= "\n\n" . $m->parse();
3690                         $previewHTML = '';
3691                 }
3692
3693                 if ( $this->isConflict ) {
3694                         $conflict = '<h2 id="mw-previewconflict">'
3695                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3696                 } else {
3697                         $conflict = '<hr />';
3698                 }
3699
3700                 $previewhead = "<div class='previewnote'>\n" .
3701                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3702                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3703
3704                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3705                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3706                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3707                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3708
3709                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3710         }
3711
3712         /**
3713          * @return array
3714          */
3715         function getTemplates() {
3716                 if ( $this->preview || $this->section != '' ) {
3717                         $templates = array();
3718                         if ( !isset( $this->mParserOutput ) ) {
3719                                 return $templates;
3720                         }
3721                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3722                                 foreach ( array_keys( $template ) as $dbk ) {
3723                                         $templates[] = Title::makeTitle( $ns, $dbk );
3724                                 }
3725                         }
3726                         return $templates;
3727                 } else {
3728                         return $this->mTitle->getTemplateLinksFrom();
3729                 }
3730         }
3731
3732         /**
3733          * Shows a bulletin board style toolbar for common editing functions.
3734          * It can be disabled in the user preferences.
3735          *
3736          * @param $title Title object for the page being edited (optional)
3737          * @return string
3738          */
3739         static function getEditToolbar( $title = null ) {
3740                 global $wgContLang, $wgOut;
3741                 global $wgEnableUploads, $wgForeignFileRepos;
3742
3743                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3744                 $showSignature = true;
3745                 if ( $title ) {
3746                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3747                 }
3748
3749                 /**
3750                  * $toolarray is an array of arrays each of which includes the
3751                  * opening tag, the closing tag, optionally a sample text that is
3752                  * inserted between the two when no selection is highlighted
3753                  * and.  The tip text is shown when the user moves the mouse
3754                  * over the button.
3755                  *
3756                  * Images are defined in ResourceLoaderEditToolbarModule.
3757                  */
3758                 $toolarray = array(
3759                         array(
3760                                 'id'     => 'mw-editbutton-bold',
3761                                 'open'   => '\'\'\'',
3762                                 'close'  => '\'\'\'',
3763                                 'sample' => wfMessage( 'bold_sample' )->text(),
3764                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3765                         ),
3766                         array(
3767                                 'id'     => 'mw-editbutton-italic',
3768                                 'open'   => '\'\'',
3769                                 'close'  => '\'\'',
3770                                 'sample' => wfMessage( 'italic_sample' )->text(),
3771                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3772                         ),
3773                         array(
3774                                 'id'     => 'mw-editbutton-link',
3775                                 'open'   => '[[',
3776                                 'close'  => ']]',
3777                                 'sample' => wfMessage( 'link_sample' )->text(),
3778                                 'tip'    => wfMessage( 'link_tip' )->text(),
3779                         ),
3780                         array(
3781                                 'id'     => 'mw-editbutton-extlink',
3782                                 'open'   => '[',
3783                                 'close'  => ']',
3784                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3785                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3786                         ),
3787                         array(
3788                                 'id'     => 'mw-editbutton-headline',
3789                                 'open'   => "\n== ",
3790                                 'close'  => " ==\n",
3791                                 'sample' => wfMessage( 'headline_sample' )->text(),
3792                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3793                         ),
3794                         $imagesAvailable ? array(
3795                                 'id'     => 'mw-editbutton-image',
3796                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3797                                 'close'  => ']]',
3798                                 'sample' => wfMessage( 'image_sample' )->text(),
3799                                 'tip'    => wfMessage( 'image_tip' )->text(),
3800                         ) : false,
3801                         $imagesAvailable ? array(
3802                                 'id'     => 'mw-editbutton-media',
3803                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3804                                 'close'  => ']]',
3805                                 'sample' => wfMessage( 'media_sample' )->text(),
3806                                 'tip'    => wfMessage( 'media_tip' )->text(),
3807                         ) : false,
3808                         array(
3809                                 'id'     => 'mw-editbutton-nowiki',
3810                                 'open'   => "<nowiki>",
3811                                 'close'  => "</nowiki>",
3812                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3813                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3814                         ),
3815                         $showSignature ? array(
3816                                 'id'     => 'mw-editbutton-signature',
3817                                 'open'   => '--~~~~',
3818                                 'close'  => '',
3819                                 'sample' => '',
3820                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3821                         ) : false,
3822                         array(
3823                                 'id'     => 'mw-editbutton-hr',
3824                                 'open'   => "\n----\n",
3825                                 'close'  => '',
3826                                 'sample' => '',
3827                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3828                         )
3829                 );
3830
3831                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3832                 foreach ( $toolarray as $tool ) {
3833                         if ( !$tool ) {
3834                                 continue;
3835                         }
3836
3837                         $params = array(
3838                                 // Images are defined in ResourceLoaderEditToolbarModule
3839                                 false,
3840                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3841                                 // Older browsers show a "speedtip" type message only for ALT.
3842                                 // Ideally these should be different, realistically they
3843                                 // probably don't need to be.
3844                                 $tool['tip'],
3845                                 $tool['open'],
3846                                 $tool['close'],
3847                                 $tool['sample'],
3848                                 $tool['id'],
3849                         );
3850
3851                         $script .= Xml::encodeJsCall(
3852                                 'mw.toolbar.addButton',
3853                                 $params,
3854                                 ResourceLoader::inDebugMode()
3855                         );
3856                 }
3857
3858                 $script .= '});';
3859                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
3860
3861                 $toolbar = '<div id="toolbar"></div>';
3862
3863                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3864
3865                 return $toolbar;
3866         }
3867
3868         /**
3869          * Returns an array of html code of the following checkboxes:
3870          * minor and watch
3871          *
3872          * @param int $tabindex Current tabindex
3873          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3874          *                 status of the checkbox
3875          *
3876          * @return array
3877          */
3878         public function getCheckboxes( &$tabindex, $checked ) {
3879                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3880
3881                 $checkboxes = array();
3882
3883                 // don't show the minor edit checkbox if it's a new page or section
3884                 if ( !$this->isNew ) {
3885                         $checkboxes['minor'] = '';
3886                         $minorLabel = wfMessage( 'minoredit' )->parse();
3887                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3888                                 $attribs = array(
3889                                         'tabindex' => ++$tabindex,
3890                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3891                                         'id' => 'wpMinoredit',
3892                                 );
3893                                 $minorEditHtml =
3894                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3895                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3896                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3897                                         ">{$minorLabel}</label>";
3898
3899                                 if ( $wgUseMediaWikiUIEverywhere ) {
3900                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3901                                                 $minorEditHtml .
3902                                         Html::closeElement( 'div' );
3903                                 } else {
3904                                         $checkboxes['minor'] = $minorEditHtml;
3905                                 }
3906                         }
3907                 }
3908
3909                 $watchLabel = wfMessage( 'watchthis' )->parse();
3910                 $checkboxes['watch'] = '';
3911                 if ( $wgUser->isLoggedIn() ) {
3912                         $attribs = array(
3913                                 'tabindex' => ++$tabindex,
3914                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3915                                 'id' => 'wpWatchthis',
3916                         );
3917                         $watchThisHtml =
3918                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3919                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3920                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3921                                 ">{$watchLabel}</label>";
3922                         if ( $wgUseMediaWikiUIEverywhere ) {
3923                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3924                                         $watchThisHtml .
3925                                         Html::closeElement( 'div' );
3926                         } else {
3927                                 $checkboxes['watch'] = $watchThisHtml;
3928                         }
3929                 }
3930                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3931                 return $checkboxes;
3932         }
3933
3934         /**
3935          * Returns an array of html code of the following buttons:
3936          * save, diff, preview and live
3937          *
3938          * @param int $tabindex Current tabindex
3939          *
3940          * @return array
3941          */
3942         public function getEditButtons( &$tabindex ) {
3943                 $buttons = array();
3944
3945                 $attribs = array(
3946                         'id' => 'wpSave',
3947                         'name' => 'wpSave',
3948                         'tabindex' => ++$tabindex,
3949                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3950                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3951                         $attribs, array( 'mw-ui-constructive' ) );
3952
3953                 ++$tabindex; // use the same for preview and live preview
3954                 $attribs = array(
3955                         'id' => 'wpPreview',
3956                         'name' => 'wpPreview',
3957                         'tabindex' => $tabindex,
3958                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3959                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3960                         $attribs );
3961                 $buttons['live'] = '';
3962
3963                 $attribs = array(
3964                         'id' => 'wpDiff',
3965                         'name' => 'wpDiff',
3966                         'tabindex' => ++$tabindex,
3967                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3968                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3969                         $attribs );
3970
3971                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3972                 return $buttons;
3973         }
3974
3975         /**
3976          * Creates a basic error page which informs the user that
3977          * they have attempted to edit a nonexistent section.
3978          */
3979         function noSuchSectionPage() {
3980                 global $wgOut;
3981
3982                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3983
3984                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3985                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3986                 $wgOut->addHTML( $res );
3987
3988                 $wgOut->returnToMain( false, $this->mTitle );
3989         }
3990
3991         /**
3992          * Show "your edit contains spam" page with your diff and text
3993          *
3994          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3995          */
3996         public function spamPageWithContent( $match = false ) {
3997                 global $wgOut, $wgLang;
3998                 $this->textbox2 = $this->textbox1;
3999
4000                 if ( is_array( $match ) ) {
4001                         $match = $wgLang->listToText( $match );
4002                 }
4003                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
4004
4005                 $wgOut->addHTML( '<div id="spamprotected">' );
4006                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4007                 if ( $match ) {
4008                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4009                 }
4010                 $wgOut->addHTML( '</div>' );
4011
4012                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4013                 $this->showDiff();
4014
4015                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4016                 $this->showTextbox2();
4017
4018                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
4019         }
4020
4021         /**
4022          * Check if the browser is on a blacklist of user-agents known to
4023          * mangle UTF-8 data on form submission. Returns true if Unicode
4024          * should make it through, false if it's known to be a problem.
4025          * @return bool
4026          */
4027         private function checkUnicodeCompliantBrowser() {
4028                 global $wgBrowserBlackList, $wgRequest;
4029
4030                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4031                 if ( $currentbrowser === false ) {
4032                         // No User-Agent header sent? Trust it by default...
4033                         return true;
4034                 }
4035
4036                 foreach ( $wgBrowserBlackList as $browser ) {
4037                         if ( preg_match( $browser, $currentbrowser ) ) {
4038                                 return false;
4039                         }
4040                 }
4041                 return true;
4042         }
4043
4044         /**
4045          * Filter an input field through a Unicode de-armoring process if it
4046          * came from an old browser with known broken Unicode editing issues.
4047          *
4048          * @param WebRequest $request
4049          * @param string $field
4050          * @return string
4051          */
4052         protected function safeUnicodeInput( $request, $field ) {
4053                 $text = rtrim( $request->getText( $field ) );
4054                 return $request->getBool( 'safemode' )
4055                         ? $this->unmakeSafe( $text )
4056                         : $text;
4057         }
4058
4059         /**
4060          * Filter an output field through a Unicode armoring process if it is
4061          * going to an old browser with known broken Unicode editing issues.
4062          *
4063          * @param string $text
4064          * @return string
4065          */
4066         protected function safeUnicodeOutput( $text ) {
4067                 global $wgContLang;
4068                 $codedText = $wgContLang->recodeForEdit( $text );
4069                 return $this->checkUnicodeCompliantBrowser()
4070                         ? $codedText
4071                         : $this->makeSafe( $codedText );
4072         }
4073
4074         /**
4075          * A number of web browsers are known to corrupt non-ASCII characters
4076          * in a UTF-8 text editing environment. To protect against this,
4077          * detected browsers will be served an armored version of the text,
4078          * with non-ASCII chars converted to numeric HTML character references.
4079          *
4080          * Preexisting such character references will have a 0 added to them
4081          * to ensure that round-trips do not alter the original data.
4082          *
4083          * @param string $invalue
4084          * @return string
4085          */
4086         private function makeSafe( $invalue ) {
4087                 // Armor existing references for reversibility.
4088                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4089
4090                 $bytesleft = 0;
4091                 $result = "";
4092                 $working = 0;
4093                 $valueLength = strlen( $invalue );
4094                 for ( $i = 0; $i < $valueLength; $i++ ) {
4095                         $bytevalue = ord( $invalue[$i] );
4096                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4097                                 $result .= chr( $bytevalue );
4098                                 $bytesleft = 0;
4099                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4100                                 $working = $working << 6;
4101                                 $working += ( $bytevalue & 0x3F );
4102                                 $bytesleft--;
4103                                 if ( $bytesleft <= 0 ) {
4104                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4105                                 }
4106                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4107                                 $working = $bytevalue & 0x1F;
4108                                 $bytesleft = 1;
4109                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4110                                 $working = $bytevalue & 0x0F;
4111                                 $bytesleft = 2;
4112                         } else { // 1111 0xxx
4113                                 $working = $bytevalue & 0x07;
4114                                 $bytesleft = 3;
4115                         }
4116                 }
4117                 return $result;
4118         }
4119
4120         /**
4121          * Reverse the previously applied transliteration of non-ASCII characters
4122          * back to UTF-8. Used to protect data from corruption by broken web browsers
4123          * as listed in $wgBrowserBlackList.
4124          *
4125          * @param string $invalue
4126          * @return string
4127          */
4128         private function unmakeSafe( $invalue ) {
4129                 $result = "";
4130                 $valueLength = strlen( $invalue );
4131                 for ( $i = 0; $i < $valueLength; $i++ ) {
4132                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4133                                 $i += 3;
4134                                 $hexstring = "";
4135                                 do {
4136                                         $hexstring .= $invalue[$i];
4137                                         $i++;
4138                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4139
4140                                 // Do some sanity checks. These aren't needed for reversibility,
4141                                 // but should help keep the breakage down if the editor
4142                                 // breaks one of the entities whilst editing.
4143                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4144                                         $codepoint = hexdec( $hexstring );
4145                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4146                                 } else {
4147                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4148                                 }
4149                         } else {
4150                                 $result .= substr( $invalue, $i, 1 );
4151                         }
4152                 }
4153                 // reverse the transform that we made for reversibility reasons.
4154                 return strtr( $result, array( "&#x0" => "&#x" ) );
4155         }
4156 }