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 edit's parent revision ID
1203          *
1204          * The "parent" revision is the ancestor that should be recorded in this
1205          * page's revision history.  It is either the revision ID of the in-memory
1206          * article content, or in the case of a 3-way merge in order to rebase
1207          * across a recoverable edit conflict, the ID of the newer revision to
1208          * which we have rebased this page.
1209          *
1210          * @since 1.25
1211          * @return int Revision ID
1212          */
1213         public function getParentRevId() {
1214                 if ( $this->parentRevId ) {
1215                         return $this->parentRevId;
1216                 } else {
1217                         return $this->mArticle->getRevIdFetched();
1218                 }
1219         }
1220
1221         /**
1222          * Get the current content of the page. This is basically similar to
1223          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1224          * content object is returned instead of null.
1225          *
1226          * @since 1.21
1227          * @return Content
1228          */
1229         protected function getCurrentContent() {
1230                 $rev = $this->mArticle->getRevision();
1231                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1232
1233                 if ( $content === false || $content === null ) {
1234                         if ( !$this->contentModel ) {
1235                                 $this->contentModel = $this->getTitle()->getContentModel();
1236                         }
1237                         $handler = ContentHandler::getForModelID( $this->contentModel );
1238
1239                         return $handler->makeEmptyContent();
1240                 } else {
1241                         # nasty side-effect, but needed for consistency
1242                         $this->contentModel = $rev->getContentModel();
1243                         $this->contentFormat = $rev->getContentFormat();
1244
1245                         return $content;
1246                 }
1247         }
1248
1249         /**
1250          * Use this method before edit() to preload some content into the edit box
1251          *
1252          * @param Content $content
1253          *
1254          * @since 1.21
1255          */
1256         public function setPreloadedContent( Content $content ) {
1257                 $this->mPreloadContent = $content;
1258         }
1259
1260         /**
1261          * Get the contents to be preloaded into the box, either set by
1262          * an earlier setPreloadText() or by loading the given page.
1263          *
1264          * @param string $preload Representing the title to preload from.
1265          * @param array $params Parameters to use (interface-message style) in the preloaded text
1266          *
1267          * @return Content
1268          *
1269          * @since 1.21
1270          */
1271         protected function getPreloadedContent( $preload, $params = array() ) {
1272                 global $wgUser;
1273
1274                 if ( !empty( $this->mPreloadContent ) ) {
1275                         return $this->mPreloadContent;
1276                 }
1277
1278                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1279
1280                 if ( $preload === '' ) {
1281                         return $handler->makeEmptyContent();
1282                 }
1283
1284                 $title = Title::newFromText( $preload );
1285                 # Check for existence to avoid getting MediaWiki:Noarticletext
1286                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1287                         // TODO: somehow show a warning to the user!
1288                         return $handler->makeEmptyContent();
1289                 }
1290
1291                 $page = WikiPage::factory( $title );
1292                 if ( $page->isRedirect() ) {
1293                         $title = $page->getRedirectTarget();
1294                         # Same as before
1295                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1296                                 // TODO: somehow show a warning to the user!
1297                                 return $handler->makeEmptyContent();
1298                         }
1299                         $page = WikiPage::factory( $title );
1300                 }
1301
1302                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1303                 $content = $page->getContent( Revision::RAW );
1304
1305                 if ( !$content ) {
1306                         // TODO: somehow show a warning to the user!
1307                         return $handler->makeEmptyContent();
1308                 }
1309
1310                 if ( $content->getModel() !== $handler->getModelID() ) {
1311                         $converted = $content->convert( $handler->getModelID() );
1312
1313                         if ( !$converted ) {
1314                                 // TODO: somehow show a warning to the user!
1315                                 wfDebug( "Attempt to preload incompatible content: " .
1316                                         "can't convert " . $content->getModel() .
1317                                         " to " . $handler->getModelID() );
1318
1319                                 return $handler->makeEmptyContent();
1320                         }
1321
1322                         $content = $converted;
1323                 }
1324
1325                 return $content->preloadTransform( $title, $parserOptions, $params );
1326         }
1327
1328         /**
1329          * Make sure the form isn't faking a user's credentials.
1330          *
1331          * @param WebRequest $request
1332          * @return bool
1333          * @private
1334          */
1335         function tokenOk( &$request ) {
1336                 global $wgUser;
1337                 $token = $request->getVal( 'wpEditToken' );
1338                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1339                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1340                 return $this->mTokenOk;
1341         }
1342
1343         /**
1344          * Sets post-edit cookie indicating the user just saved a particular revision.
1345          *
1346          * This uses a temporary cookie for each revision ID so separate saves will never
1347          * interfere with each other.
1348          *
1349          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1350          * the redirect.  It must be clearable by JavaScript code, so it must not be
1351          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1352          * variable.
1353          *
1354          * If the variable were set on the server, it would be cached, which is unwanted
1355          * since the post-edit state should only apply to the load right after the save.
1356          *
1357          * @param int $statusValue The status value (to check for new article status)
1358          */
1359         protected function setPostEditCookie( $statusValue ) {
1360                 $revisionId = $this->mArticle->getLatest();
1361                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1362
1363                 $val = 'saved';
1364                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1365                         $val = 'created';
1366                 } elseif ( $this->oldid ) {
1367                         $val = 'restored';
1368                 }
1369
1370                 $response = RequestContext::getMain()->getRequest()->response();
1371                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1372                         'httpOnly' => false,
1373                 ) );
1374         }
1375
1376         /**
1377          * Attempt submission
1378          * @param array $resultDetails See docs for $result in internalAttemptSave
1379          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1380          * @return Status The resulting status object.
1381          */
1382         public function attemptSave( &$resultDetails = false ) {
1383                 global $wgUser;
1384
1385                 # Allow bots to exempt some edits from bot flagging
1386                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1387                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1388
1389                 Hooks::run( 'EditPage::attemptSave:after', array( $this, $status, $resultDetails ) );
1390
1391                 return $status;
1392         }
1393
1394         /**
1395          * Handle status, such as after attempt save
1396          *
1397          * @param Status $status
1398          * @param array|bool $resultDetails
1399          *
1400          * @throws ErrorPageError
1401          * @return bool False, if output is done, true if rest of the form should be displayed
1402          */
1403         private function handleStatus( Status $status, $resultDetails ) {
1404                 global $wgUser, $wgOut;
1405
1406                 /**
1407                  * @todo FIXME: once the interface for internalAttemptSave() is made
1408                  *   nicer, this should use the message in $status
1409                  */
1410                 if ( $status->value == self::AS_SUCCESS_UPDATE
1411                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1412                 ) {
1413                         $this->didSave = true;
1414                         if ( !$resultDetails['nullEdit'] ) {
1415                                 $this->setPostEditCookie( $status->value );
1416                         }
1417                 }
1418
1419                 switch ( $status->value ) {
1420                         case self::AS_HOOK_ERROR_EXPECTED:
1421                         case self::AS_CONTENT_TOO_BIG:
1422                         case self::AS_ARTICLE_WAS_DELETED:
1423                         case self::AS_CONFLICT_DETECTED:
1424                         case self::AS_SUMMARY_NEEDED:
1425                         case self::AS_TEXTBOX_EMPTY:
1426                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1427                         case self::AS_END:
1428                         case self::AS_BLANK_ARTICLE:
1429                         case self::AS_SELF_REDIRECT:
1430                                 return true;
1431
1432                         case self::AS_HOOK_ERROR:
1433                                 return false;
1434
1435                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1436                         case self::AS_PARSE_ERROR:
1437                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1438                                 return true;
1439
1440                         case self::AS_SUCCESS_NEW_ARTICLE:
1441                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1442                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1443                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1444                                 return false;
1445
1446                         case self::AS_SUCCESS_UPDATE:
1447                                 $extraQuery = '';
1448                                 $sectionanchor = $resultDetails['sectionanchor'];
1449
1450                                 // Give extensions a chance to modify URL query on update
1451                                 Hooks::run(
1452                                         'ArticleUpdateBeforeRedirect',
1453                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1454                                 );
1455
1456                                 if ( $resultDetails['redirect'] ) {
1457                                         if ( $extraQuery == '' ) {
1458                                                 $extraQuery = 'redirect=no';
1459                                         } else {
1460                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1461                                         }
1462                                 }
1463                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1464                                 return false;
1465
1466                         case self::AS_SPAM_ERROR:
1467                                 $this->spamPageWithContent( $resultDetails['spam'] );
1468                                 return false;
1469
1470                         case self::AS_BLOCKED_PAGE_FOR_USER:
1471                                 throw new UserBlockedError( $wgUser->getBlock() );
1472
1473                         case self::AS_IMAGE_REDIRECT_ANON:
1474                         case self::AS_IMAGE_REDIRECT_LOGGED:
1475                                 throw new PermissionsError( 'upload' );
1476
1477                         case self::AS_READ_ONLY_PAGE_ANON:
1478                         case self::AS_READ_ONLY_PAGE_LOGGED:
1479                                 throw new PermissionsError( 'edit' );
1480
1481                         case self::AS_READ_ONLY_PAGE:
1482                                 throw new ReadOnlyError;
1483
1484                         case self::AS_RATE_LIMITED:
1485                                 throw new ThrottledError();
1486
1487                         case self::AS_NO_CREATE_PERMISSION:
1488                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1489                                 throw new PermissionsError( $permission );
1490
1491                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1492                                 throw new PermissionsError( 'editcontentmodel' );
1493
1494                         default:
1495                                 // We don't recognize $status->value. The only way that can happen
1496                                 // is if an extension hook aborted from inside ArticleSave.
1497                                 // Render the status object into $this->hookError
1498                                 // FIXME this sucks, we should just use the Status object throughout
1499                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1500                                         '</div>';
1501                                 return true;
1502                 }
1503         }
1504
1505         /**
1506          * Run hooks that can filter edits just before they get saved.
1507          *
1508          * @param Content $content The Content to filter.
1509          * @param Status $status For reporting the outcome to the caller
1510          * @param User $user The user performing the edit
1511          *
1512          * @return bool
1513          */
1514         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1515                 // Run old style post-section-merge edit filter
1516                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1517                         array( $this, $content, &$this->hookError, $this->summary ) )
1518                 ) {
1519                         # Error messages etc. could be handled within the hook...
1520                         $status->fatal( 'hookaborted' );
1521                         $status->value = self::AS_HOOK_ERROR;
1522                         return false;
1523                 } elseif ( $this->hookError != '' ) {
1524                         # ...or the hook could be expecting us to produce an error
1525                         $status->fatal( 'hookaborted' );
1526                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1527                         return false;
1528                 }
1529
1530                 // Run new style post-section-merge edit filter
1531                 if ( !Hooks::run( 'EditFilterMergedContent',
1532                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1533                                 $user, $this->minoredit ) )
1534                 ) {
1535                         # Error messages etc. could be handled within the hook...
1536                         if ( $status->isGood() ) {
1537                                 $status->fatal( 'hookaborted' );
1538                                 // Not setting $this->hookError here is a hack to allow the hook
1539                                 // to cause a return to the edit page without $this->hookError
1540                                 // being set. This is used by ConfirmEdit to display a captcha
1541                                 // without any error message cruft.
1542                         } else {
1543                                 $this->hookError = $status->getWikiText();
1544                         }
1545                         // Use the existing $status->value if the hook set it
1546                         if ( !$status->value ) {
1547                                 $status->value = self::AS_HOOK_ERROR;
1548                         }
1549                         return false;
1550                 } elseif ( !$status->isOK() ) {
1551                         # ...or the hook could be expecting us to produce an error
1552                         // FIXME this sucks, we should just use the Status object throughout
1553                         $this->hookError = $status->getWikiText();
1554                         $status->fatal( 'hookaborted' );
1555                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1556                         return false;
1557                 }
1558
1559                 return true;
1560         }
1561
1562         /**
1563          * Return the summary to be used for a new section.
1564          *
1565          * @param string $sectionanchor Set to the section anchor text
1566          * @return string
1567          */
1568         private function newSectionSummary( &$sectionanchor = null ) {
1569                 global $wgParser;
1570
1571                 if ( $this->sectiontitle !== '' ) {
1572                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1573                         // If no edit summary was specified, create one automatically from the section
1574                         // title and have it link to the new section. Otherwise, respect the summary as
1575                         // passed.
1576                         if ( $this->summary === '' ) {
1577                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1578                                 return wfMessage( 'newsectionsummary' )
1579                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1580                         }
1581                 } elseif ( $this->summary !== '' ) {
1582                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1583                         # This is a new section, so create a link to the new section
1584                         # in the revision summary.
1585                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1586                         return wfMessage( 'newsectionsummary' )
1587                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1588                 }
1589                 return $this->summary;
1590         }
1591
1592         /**
1593          * Attempt submission (no UI)
1594          *
1595          * @param array $result Array to add statuses to, currently with the
1596          *   possible keys:
1597          *   - spam (string): Spam string from content if any spam is detected by
1598          *     matchSpamRegex.
1599          *   - sectionanchor (string): Section anchor for a section save.
1600          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1601          *     false otherwise.
1602          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1603          *     revision is a redirect.
1604          * @param bool $bot True if edit is being made under the bot right.
1605          *
1606          * @return Status Status object, possibly with a message, but always with
1607          *   one of the AS_* constants in $status->value,
1608          *
1609          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1610          *   various error display idiosyncrasies. There are also lots of cases
1611          *   where error metadata is set in the object and retrieved later instead
1612          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1613          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1614          * time.
1615          */
1616         function internalAttemptSave( &$result, $bot = false ) {
1617                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1618                 global $wgContentHandlerUseDB;
1619
1620                 $status = Status::newGood();
1621
1622                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1623                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1624                         $status->fatal( 'hookaborted' );
1625                         $status->value = self::AS_HOOK_ERROR;
1626                         return $status;
1627                 }
1628
1629                 $spam = $wgRequest->getText( 'wpAntispam' );
1630                 if ( $spam !== '' ) {
1631                         wfDebugLog(
1632                                 'SimpleAntiSpam',
1633                                 $wgUser->getName() .
1634                                 ' editing "' .
1635                                 $this->mTitle->getPrefixedText() .
1636                                 '" submitted bogus field "' .
1637                                 $spam .
1638                                 '"'
1639                         );
1640                         $status->fatal( 'spamprotectionmatch', false );
1641                         $status->value = self::AS_SPAM_ERROR;
1642                         return $status;
1643                 }
1644
1645                 try {
1646                         # Construct Content object
1647                         $textbox_content = $this->toEditContent( $this->textbox1 );
1648                 } catch ( MWContentSerializationException $ex ) {
1649                         $status->fatal(
1650                                 'content-failed-to-parse',
1651                                 $this->contentModel,
1652                                 $this->contentFormat,
1653                                 $ex->getMessage()
1654                         );
1655                         $status->value = self::AS_PARSE_ERROR;
1656                         return $status;
1657                 }
1658
1659                 # Check image redirect
1660                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1661                         $textbox_content->isRedirect() &&
1662                         !$wgUser->isAllowed( 'upload' )
1663                 ) {
1664                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1665                                 $status->setResult( false, $code );
1666
1667                                 return $status;
1668                 }
1669
1670                 # Check for spam
1671                 $match = self::matchSummarySpamRegex( $this->summary );
1672                 if ( $match === false && $this->section == 'new' ) {
1673                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1674                         # regular summaries, it is added to the actual wikitext.
1675                         if ( $this->sectiontitle !== '' ) {
1676                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1677                                 $match = self::matchSpamRegex( $this->sectiontitle );
1678                         } else {
1679                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1680                                 # is used with the 'summary' parameter.
1681                                 $match = self::matchSpamRegex( $this->summary );
1682                         }
1683                 }
1684                 if ( $match === false ) {
1685                         $match = self::matchSpamRegex( $this->textbox1 );
1686                 }
1687                 if ( $match !== false ) {
1688                         $result['spam'] = $match;
1689                         $ip = $wgRequest->getIP();
1690                         $pdbk = $this->mTitle->getPrefixedDBkey();
1691                         $match = str_replace( "\n", '', $match );
1692                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1693                         $status->fatal( 'spamprotectionmatch', $match );
1694                         $status->value = self::AS_SPAM_ERROR;
1695                         return $status;
1696                 }
1697                 if ( !Hooks::run(
1698                         'EditFilter',
1699                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1700                 ) {
1701                         # Error messages etc. could be handled within the hook...
1702                         $status->fatal( 'hookaborted' );
1703                         $status->value = self::AS_HOOK_ERROR;
1704                         return $status;
1705                 } elseif ( $this->hookError != '' ) {
1706                         # ...or the hook could be expecting us to produce an error
1707                         $status->fatal( 'hookaborted' );
1708                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1709                         return $status;
1710                 }
1711
1712                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1713                         // Auto-block user's IP if the account was "hard" blocked
1714                         $wgUser->spreadAnyEditBlock();
1715                         # Check block state against master, thus 'false'.
1716                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1717                         return $status;
1718                 }
1719
1720                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1721                 if ( $this->kblength > $wgMaxArticleSize ) {
1722                         // Error will be displayed by showEditForm()
1723                         $this->tooBig = true;
1724                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1725                         return $status;
1726                 }
1727
1728                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1729                         if ( $wgUser->isAnon() ) {
1730                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1731                                 return $status;
1732                         } else {
1733                                 $status->fatal( 'readonlytext' );
1734                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1735                                 return $status;
1736                         }
1737                 }
1738
1739                 $changingContentModel = false;
1740                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1741                         if ( !$wgContentHandlerUseDB ) {
1742                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1743                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1744                                 return $status;
1745                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1746                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1747                                 return $status;
1748
1749                         }
1750                         $changingContentModel = true;
1751                         $oldContentModel = $this->mTitle->getContentModel();
1752                 }
1753
1754                 if ( $this->changeTags ) {
1755                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1756                                 $this->changeTags, $wgUser );
1757                         if ( !$changeTagsStatus->isOK() ) {
1758                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1759                                 return $changeTagsStatus;
1760                         }
1761                 }
1762
1763                 if ( wfReadOnly() ) {
1764                         $status->fatal( 'readonlytext' );
1765                         $status->value = self::AS_READ_ONLY_PAGE;
1766                         return $status;
1767                 }
1768                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1769                         $status->fatal( 'actionthrottledtext' );
1770                         $status->value = self::AS_RATE_LIMITED;
1771                         return $status;
1772                 }
1773
1774                 # If the article has been deleted while editing, don't save it without
1775                 # confirmation
1776                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1777                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1778                         return $status;
1779                 }
1780
1781                 # Load the page data from the master. If anything changes in the meantime,
1782                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1783                 $this->mArticle->loadPageData( 'fromdbmaster' );
1784                 $new = !$this->mArticle->exists();
1785
1786                 if ( $new ) {
1787                         // Late check for create permission, just in case *PARANOIA*
1788                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1789                                 $status->fatal( 'nocreatetext' );
1790                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1791                                 wfDebug( __METHOD__ . ": no create permission\n" );
1792                                 return $status;
1793                         }
1794
1795                         // Don't save a new page if it's blank or if it's a MediaWiki:
1796                         // message with content equivalent to default (allow empty pages
1797                         // in this case to disable messages, see bug 50124)
1798                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1799                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1800                                 $defaultText = $defaultMessageText;
1801                         } else {
1802                                 $defaultText = '';
1803                         }
1804
1805                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1806                                 $this->blankArticle = true;
1807                                 $status->fatal( 'blankarticle' );
1808                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1809                                 return $status;
1810                         }
1811
1812                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1813                                 return $status;
1814                         }
1815
1816                         $content = $textbox_content;
1817
1818                         $result['sectionanchor'] = '';
1819                         if ( $this->section == 'new' ) {
1820                                 if ( $this->sectiontitle !== '' ) {
1821                                         // Insert the section title above the content.
1822                                         $content = $content->addSectionHeader( $this->sectiontitle );
1823                                 } elseif ( $this->summary !== '' ) {
1824                                         // Insert the section title above the content.
1825                                         $content = $content->addSectionHeader( $this->summary );
1826                                 }
1827                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1828                         }
1829
1830                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1831
1832                 } else { # not $new
1833
1834                         # Article exists. Check for edit conflict.
1835
1836                         $this->mArticle->clear(); # Force reload of dates, etc.
1837                         $timestamp = $this->mArticle->getTimestamp();
1838
1839                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1840
1841                         if ( $timestamp != $this->edittime ) {
1842                                 $this->isConflict = true;
1843                                 if ( $this->section == 'new' ) {
1844                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1845                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1846                                         ) {
1847                                                 // Probably a duplicate submission of a new comment.
1848                                                 // This can happen when squid resends a request after
1849                                                 // a timeout but the first one actually went through.
1850                                                 wfDebug( __METHOD__
1851                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1852                                         } else {
1853                                                 // New comment; suppress conflict.
1854                                                 $this->isConflict = false;
1855                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1856                                         }
1857                                 } elseif ( $this->section == ''
1858                                         && Revision::userWasLastToEdit(
1859                                                 DB_MASTER, $this->mTitle->getArticleID(),
1860                                                 $wgUser->getId(), $this->edittime
1861                                         )
1862                                 ) {
1863                                         # Suppress edit conflict with self, except for section edits where merging is required.
1864                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1865                                         $this->isConflict = false;
1866                                 }
1867                         }
1868
1869                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1870                         if ( $this->sectiontitle !== '' ) {
1871                                 $sectionTitle = $this->sectiontitle;
1872                         } else {
1873                                 $sectionTitle = $this->summary;
1874                         }
1875
1876                         $content = null;
1877
1878                         if ( $this->isConflict ) {
1879                                 wfDebug( __METHOD__
1880                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1881                                         . " (article time '{$timestamp}')\n" );
1882
1883                                 $content = $this->mArticle->replaceSectionContent(
1884                                         $this->section,
1885                                         $textbox_content,
1886                                         $sectionTitle,
1887                                         $this->edittime
1888                                 );
1889                         } else {
1890                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1891                                 $content = $this->mArticle->replaceSectionContent(
1892                                         $this->section,
1893                                         $textbox_content,
1894                                         $sectionTitle
1895                                 );
1896                         }
1897
1898                         if ( is_null( $content ) ) {
1899                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1900                                 $this->isConflict = true;
1901                                 $content = $textbox_content; // do not try to merge here!
1902                         } elseif ( $this->isConflict ) {
1903                                 # Attempt merge
1904                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1905                                         // Successful merge! Maybe we should tell the user the good news?
1906                                         $this->isConflict = false;
1907                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1908                                 } else {
1909                                         $this->section = '';
1910                                         $this->textbox1 = ContentHandler::getContentText( $content );
1911                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1912                                 }
1913                         }
1914
1915                         if ( $this->isConflict ) {
1916                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1917                                 return $status;
1918                         }
1919
1920                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1921                                 return $status;
1922                         }
1923
1924                         if ( $this->section == 'new' ) {
1925                                 // Handle the user preference to force summaries here
1926                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1927                                         $this->missingSummary = true;
1928                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1929                                         $status->value = self::AS_SUMMARY_NEEDED;
1930                                         return $status;
1931                                 }
1932
1933                                 // Do not allow the user to post an empty comment
1934                                 if ( $this->textbox1 == '' ) {
1935                                         $this->missingComment = true;
1936                                         $status->fatal( 'missingcommenttext' );
1937                                         $status->value = self::AS_TEXTBOX_EMPTY;
1938                                         return $status;
1939                                 }
1940                         } elseif ( !$this->allowBlankSummary
1941                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1942                                 && !$content->isRedirect()
1943                                 && md5( $this->summary ) == $this->autoSumm
1944                         ) {
1945                                 $this->missingSummary = true;
1946                                 $status->fatal( 'missingsummary' );
1947                                 $status->value = self::AS_SUMMARY_NEEDED;
1948                                 return $status;
1949                         }
1950
1951                         # All's well
1952                         $sectionanchor = '';
1953                         if ( $this->section == 'new' ) {
1954                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1955                         } elseif ( $this->section != '' ) {
1956                                 # Try to get a section anchor from the section source, redirect
1957                                 # to edited section if header found.
1958                                 # XXX: Might be better to integrate this into Article::replaceSection
1959                                 # for duplicate heading checking and maybe parsing.
1960                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1961                                 # We can't deal with anchors, includes, html etc in the header for now,
1962                                 # headline would need to be parsed to improve this.
1963                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1964                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1965                                 }
1966                         }
1967                         $result['sectionanchor'] = $sectionanchor;
1968
1969                         // Save errors may fall down to the edit form, but we've now
1970                         // merged the section into full text. Clear the section field
1971                         // so that later submission of conflict forms won't try to
1972                         // replace that into a duplicated mess.
1973                         $this->textbox1 = $this->toEditText( $content );
1974                         $this->section = '';
1975
1976                         $status->value = self::AS_SUCCESS_UPDATE;
1977                 }
1978
1979                 if ( !$this->allowSelfRedirect
1980                         && $content->isRedirect()
1981                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1982                 ) {
1983                         // If the page already redirects to itself, don't warn.
1984                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1985                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1986                                 $this->selfRedirect = true;
1987                                 $status->fatal( 'selfredirect' );
1988                                 $status->value = self::AS_SELF_REDIRECT;
1989                                 return $status;
1990                         }
1991                 }
1992
1993                 // Check for length errors again now that the section is merged in
1994                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1995                 if ( $this->kblength > $wgMaxArticleSize ) {
1996                         $this->tooBig = true;
1997                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1998                         return $status;
1999                 }
2000
2001                 $flags = EDIT_AUTOSUMMARY |
2002                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
2003                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
2004                         ( $bot ? EDIT_FORCE_BOT : 0 );
2005
2006                 $doEditStatus = $this->mArticle->doEditContent(
2007                         $content,
2008                         $this->summary,
2009                         $flags,
2010                         false,
2011                         $wgUser,
2012                         $content->getDefaultFormat()
2013                 );
2014
2015                 if ( !$doEditStatus->isOK() ) {
2016                         // Failure from doEdit()
2017                         // Show the edit conflict page for certain recognized errors from doEdit(),
2018                         // but don't show it for errors from extension hooks
2019                         $errors = $doEditStatus->getErrorsArray();
2020                         if ( in_array( $errors[0][0],
2021                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
2022                         ) {
2023                                 $this->isConflict = true;
2024                                 // Destroys data doEdit() put in $status->value but who cares
2025                                 $doEditStatus->value = self::AS_END;
2026                         }
2027                         return $doEditStatus;
2028                 }
2029
2030                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2031                 if ( $result['nullEdit'] ) {
2032                         // We don't know if it was a null edit until now, so increment here
2033                         $wgUser->pingLimiter( 'linkpurge' );
2034                 }
2035                 $result['redirect'] = $content->isRedirect();
2036
2037                 $this->updateWatchlist();
2038
2039                 if ( $this->changeTags && isset( $doEditStatus->value['revision'] ) ) {
2040                         // If a revision was created, apply any change tags that were requested
2041                         $addTags = $this->changeTags;
2042                         $revId = $doEditStatus->value['revision']->getId();
2043                         // Defer this both for performance and so that addTags() sees the rc_id
2044                         // since the recentchange entry addition is deferred first (bug T100248)
2045                         DeferredUpdates::addCallableUpdate( function() use ( $addTags, $revId ) {
2046                                 ChangeTags::addTags( $addTags, null, $revId );
2047                         } );
2048                 }
2049
2050                 // If the content model changed, add a log entry
2051                 if ( $changingContentModel ) {
2052                         $this->addContentModelChangeLogEntry(
2053                                 $wgUser,
2054                                 $oldContentModel,
2055                                 $this->contentModel,
2056                                 $this->summary
2057                         );
2058                 }
2059
2060                 return $status;
2061         }
2062
2063         /**
2064          * @param User $user
2065          * @param string $oldModel
2066          * @param string $newModel
2067          * @param string $reason
2068          */
2069         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2070                 $log = new ManualLogEntry( 'contentmodel', 'change' );
2071                 $log->setPerformer( $user );
2072                 $log->setTarget( $this->mTitle );
2073                 $log->setComment( $reason );
2074                 $log->setParameters( array(
2075                         '4::oldmodel' => $oldModel,
2076                         '5::newmodel' => $newModel
2077                 ) );
2078                 $logid = $log->insert();
2079                 $log->publish( $logid );
2080         }
2081
2082         /**
2083          * Register the change of watch status
2084          */
2085         protected function updateWatchlist() {
2086                 global $wgUser;
2087
2088                 if ( !$wgUser->isLoggedIn() ) {
2089                         return;
2090                 }
2091
2092                 $user = $wgUser;
2093                 $title = $this->mTitle;
2094                 $watch = $this->watchthis;
2095                 // Do this in its own transaction to reduce contention...
2096                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2097                         if ( $watch == $user->isWatched( $title, WatchedItem::IGNORE_USER_RIGHTS ) ) {
2098                                 return; // nothing to change
2099                         }
2100                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2101                 } );
2102         }
2103
2104         /**
2105          * Attempts to do 3-way merge of edit content with a base revision
2106          * and current content, in case of edit conflict, in whichever way appropriate
2107          * for the content type.
2108          *
2109          * @since 1.21
2110          *
2111          * @param Content $editContent
2112          *
2113          * @return bool
2114          */
2115         private function mergeChangesIntoContent( &$editContent ) {
2116
2117                 $db = wfGetDB( DB_MASTER );
2118
2119                 // This is the revision the editor started from
2120                 $baseRevision = $this->getBaseRevision();
2121                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2122
2123                 if ( is_null( $baseContent ) ) {
2124                         return false;
2125                 }
2126
2127                 // The current state, we want to merge updates into it
2128                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2129                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2130
2131                 if ( is_null( $currentContent ) ) {
2132                         return false;
2133                 }
2134
2135                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2136
2137                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2138
2139                 if ( $result ) {
2140                         $editContent = $result;
2141                         // Update parentRevId to what we just merged.
2142                         $this->parentRevId = $currentRevision->getId();
2143                         return true;
2144                 }
2145
2146                 return false;
2147         }
2148
2149         /**
2150          * @note: this method is very poorly named. If the user opened the form with ?oldid=X,
2151          *        one might think of X as the "base revision", which is NOT what this returns.
2152          * @return Revision Current version when the edit was started
2153          */
2154         function getBaseRevision() {
2155                 if ( !$this->mBaseRevision ) {
2156                         $db = wfGetDB( DB_MASTER );
2157                         $this->mBaseRevision = Revision::loadFromTimestamp(
2158                                 $db, $this->mTitle, $this->edittime );
2159                 }
2160                 return $this->mBaseRevision;
2161         }
2162
2163         /**
2164          * Check given input text against $wgSpamRegex, and return the text of the first match.
2165          *
2166          * @param string $text
2167          *
2168          * @return string|bool Matching string or false
2169          */
2170         public static function matchSpamRegex( $text ) {
2171                 global $wgSpamRegex;
2172                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2173                 $regexes = (array)$wgSpamRegex;
2174                 return self::matchSpamRegexInternal( $text, $regexes );
2175         }
2176
2177         /**
2178          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2179          *
2180          * @param string $text
2181          *
2182          * @return string|bool Matching string or false
2183          */
2184         public static function matchSummarySpamRegex( $text ) {
2185                 global $wgSummarySpamRegex;
2186                 $regexes = (array)$wgSummarySpamRegex;
2187                 return self::matchSpamRegexInternal( $text, $regexes );
2188         }
2189
2190         /**
2191          * @param string $text
2192          * @param array $regexes
2193          * @return bool|string
2194          */
2195         protected static function matchSpamRegexInternal( $text, $regexes ) {
2196                 foreach ( $regexes as $regex ) {
2197                         $matches = array();
2198                         if ( preg_match( $regex, $text, $matches ) ) {
2199                                 return $matches[0];
2200                         }
2201                 }
2202                 return false;
2203         }
2204
2205         function setHeaders() {
2206                 global $wgOut, $wgUser, $wgAjaxEditStash;
2207
2208                 $wgOut->addModules( 'mediawiki.action.edit' );
2209                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2210
2211                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2212                         // The addition of default buttons is handled by getEditToolbar() which
2213                         // has its own dependency on this module. The call here ensures the module
2214                         // is loaded in time (it has position "top") for other modules to register
2215                         // buttons (e.g. extensions, gadgets, user scripts).
2216                         $wgOut->addModules( 'mediawiki.toolbar' );
2217                 }
2218
2219                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2220                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2221                 }
2222
2223                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2224                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2225                 }
2226
2227                 if ( $wgAjaxEditStash ) {
2228                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2229                 }
2230
2231                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2232
2233                 # Enabled article-related sidebar, toplinks, etc.
2234                 $wgOut->setArticleRelated( true );
2235
2236                 $contextTitle = $this->getContextTitle();
2237                 if ( $this->isConflict ) {
2238                         $msg = 'editconflict';
2239                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2240                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2241                 } else {
2242                         $msg = $contextTitle->exists()
2243                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2244                                         && $contextTitle->getDefaultMessageText() !== false
2245                                 )
2246                                 ? 'editing'
2247                                 : 'creating';
2248                 }
2249
2250                 # Use the title defined by DISPLAYTITLE magic word when present
2251                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2252                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2253                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2254                 if ( $displayTitle === false ) {
2255                         $displayTitle = $contextTitle->getPrefixedText();
2256                 }
2257                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2258                 # Transmit the name of the message to JavaScript for live preview
2259                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2260                 $wgOut->addJsConfigVars( 'wgEditMessage', $msg );
2261         }
2262
2263         /**
2264          * Show all applicable editing introductions
2265          */
2266         protected function showIntro() {
2267                 global $wgOut, $wgUser;
2268                 if ( $this->suppressIntro ) {
2269                         return;
2270                 }
2271
2272                 $namespace = $this->mTitle->getNamespace();
2273
2274                 if ( $namespace == NS_MEDIAWIKI ) {
2275                         # Show a warning if editing an interface message
2276                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2277                         # If this is a default message (but not css or js),
2278                         # show a hint that it is translatable on translatewiki.net
2279                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2280                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2281                         ) {
2282                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2283                                 if ( $defaultMessageText !== false ) {
2284                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2285                                                 'translateinterface' );
2286                                 }
2287                         }
2288                 } elseif ( $namespace == NS_FILE ) {
2289                         # Show a hint to shared repo
2290                         $file = wfFindFile( $this->mTitle );
2291                         if ( $file && !$file->isLocal() ) {
2292                                 $descUrl = $file->getDescriptionUrl();
2293                                 # there must be a description url to show a hint to shared repo
2294                                 if ( $descUrl ) {
2295                                         if ( !$this->mTitle->exists() ) {
2296                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2297                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2298                                                 ) );
2299                                         } else {
2300                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2301                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2302                                                 ) );
2303                                         }
2304                                 }
2305                         }
2306                 }
2307
2308                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2309                 # Show log extract when the user is currently blocked
2310                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2311                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2312                         $username = $parts[0];
2313                         $user = User::newFromName( $username, false /* allow IP users*/ );
2314                         $ip = User::isIP( $username );
2315                         $block = Block::newFromTarget( $user, $user );
2316                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2317                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2318                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2319                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2320                                 # Show log extract if the user is currently blocked
2321                                 LogEventsList::showLogExtract(
2322                                         $wgOut,
2323                                         'block',
2324                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2325                                         '',
2326                                         array(
2327                                                 'lim' => 1,
2328                                                 'showIfEmpty' => false,
2329                                                 'msgKey' => array(
2330                                                         'blocked-notice-logextract',
2331                                                         $user->getName() # Support GENDER in notice
2332                                                 )
2333                                         )
2334                                 );
2335                         }
2336                 }
2337                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2338                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2339                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2340                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2341                         ) );
2342                         if ( $wgUser->isLoggedIn() ) {
2343                                 $wgOut->wrapWikiMsg(
2344                                         // Suppress the external link icon, consider the help url an internal one
2345                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2346                                         array(
2347                                                 'newarticletext',
2348                                                 $helpLink
2349                                         )
2350                                 );
2351                         } else {
2352                                 $wgOut->wrapWikiMsg(
2353                                         // Suppress the external link icon, consider the help url an internal one
2354                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2355                                         array(
2356                                                 'newarticletextanon',
2357                                                 $helpLink
2358                                         )
2359                                 );
2360                         }
2361                 }
2362                 # Give a notice if the user is editing a deleted/moved page...
2363                 if ( !$this->mTitle->exists() ) {
2364                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2365                                 '',
2366                                 array(
2367                                         'lim' => 10,
2368                                         'conds' => array( "log_action != 'revision'" ),
2369                                         'showIfEmpty' => false,
2370                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2371                                 )
2372                         );
2373                 }
2374         }
2375
2376         /**
2377          * Attempt to show a custom editing introduction, if supplied
2378          *
2379          * @return bool
2380          */
2381         protected function showCustomIntro() {
2382                 if ( $this->editintro ) {
2383                         $title = Title::newFromText( $this->editintro );
2384                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2385                                 global $wgOut;
2386                                 // Added using template syntax, to take <noinclude>'s into account.
2387                                 $wgOut->addWikiTextTitleTidy(
2388                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2389                                         $this->mTitle
2390                                 );
2391                                 return true;
2392                         }
2393                 }
2394                 return false;
2395         }
2396
2397         /**
2398          * Gets an editable textual representation of $content.
2399          * The textual representation can be turned by into a Content object by the
2400          * toEditContent() method.
2401          *
2402          * If $content is null or false or a string, $content is returned unchanged.
2403          *
2404          * If the given Content object is not of a type that can be edited using
2405          * the text base EditPage, an exception will be raised. Set
2406          * $this->allowNonTextContent to true to allow editing of non-textual
2407          * content.
2408          *
2409          * @param Content|null|bool|string $content
2410          * @return string The editable text form of the content.
2411          *
2412          * @throws MWException If $content is not an instance of TextContent and
2413          *   $this->allowNonTextContent is not true.
2414          */
2415         protected function toEditText( $content ) {
2416                 if ( $content === null || $content === false || is_string( $content ) ) {
2417                         return $content;
2418                 }
2419
2420                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2421                         throw new MWException( 'This content model is not supported: '
2422                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2423                 }
2424
2425                 return $content->serialize( $this->contentFormat );
2426         }
2427
2428         /**
2429          * Turns the given text into a Content object by unserializing it.
2430          *
2431          * If the resulting Content object is not of a type that can be edited using
2432          * the text base EditPage, an exception will be raised. Set
2433          * $this->allowNonTextContent to true to allow editing of non-textual
2434          * content.
2435          *
2436          * @param string|null|bool $text Text to unserialize
2437          * @return Content The content object created from $text. If $text was false
2438          *   or null, false resp. null will be  returned instead.
2439          *
2440          * @throws MWException If unserializing the text results in a Content
2441          *   object that is not an instance of TextContent and
2442          *   $this->allowNonTextContent is not true.
2443          */
2444         protected function toEditContent( $text ) {
2445                 if ( $text === false || $text === null ) {
2446                         return $text;
2447                 }
2448
2449                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2450                         $this->contentModel, $this->contentFormat );
2451
2452                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2453                         throw new MWException( 'This content model is not supported: '
2454                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2455                 }
2456
2457                 return $content;
2458         }
2459
2460         /**
2461          * Send the edit form and related headers to $wgOut
2462          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2463          *     during form output near the top, for captchas and the like.
2464          *
2465          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2466          * use the EditPage::showEditForm:fields hook instead.
2467          */
2468         function showEditForm( $formCallback = null ) {
2469                 global $wgOut, $wgUser;
2470
2471                 # need to parse the preview early so that we know which templates are used,
2472                 # otherwise users with "show preview after edit box" will get a blank list
2473                 # we parse this near the beginning so that setHeaders can do the title
2474                 # setting work instead of leaving it in getPreviewText
2475                 $previewOutput = '';
2476                 if ( $this->formtype == 'preview' ) {
2477                         $previewOutput = $this->getPreviewText();
2478                 }
2479
2480                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2481
2482                 $this->setHeaders();
2483
2484                 if ( $this->showHeader() === false ) {
2485                         return;
2486                 }
2487
2488                 $wgOut->addHTML( $this->editFormPageTop );
2489
2490                 if ( $wgUser->getOption( 'previewontop' ) ) {
2491                         $this->displayPreviewArea( $previewOutput, true );
2492                 }
2493
2494                 $wgOut->addHTML( $this->editFormTextTop );
2495
2496                 $showToolbar = true;
2497                 if ( $this->wasDeletedSinceLastEdit() ) {
2498                         if ( $this->formtype == 'save' ) {
2499                                 // Hide the toolbar and edit area, user can click preview to get it back
2500                                 // Add an confirmation checkbox and explanation.
2501                                 $showToolbar = false;
2502                         } else {
2503                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2504                                         'deletedwhileediting' );
2505                         }
2506                 }
2507
2508                 // @todo add EditForm plugin interface and use it here!
2509                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2510                 $wgOut->addHTML( Html::openElement(
2511                         'form',
2512                         array(
2513                                 'id' => self::EDITFORM_ID,
2514                                 'name' => self::EDITFORM_ID,
2515                                 'method' => 'post',
2516                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2517                                 'enctype' => 'multipart/form-data'
2518                         )
2519                 ) );
2520
2521                 if ( is_callable( $formCallback ) ) {
2522                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2523                         call_user_func_array( $formCallback, array( &$wgOut ) );
2524                 }
2525
2526                 // Add an empty field to trip up spambots
2527                 $wgOut->addHTML(
2528                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2529                         . Html::rawElement(
2530                                 'label',
2531                                 array( 'for' => 'wpAntiSpam' ),
2532                                 wfMessage( 'simpleantispam-label' )->parse()
2533                         )
2534                         . Xml::element(
2535                                 'input',
2536                                 array(
2537                                         'type' => 'text',
2538                                         'name' => 'wpAntispam',
2539                                         'id' => 'wpAntispam',
2540                                         'value' => ''
2541                                 )
2542                         )
2543                         . Xml::closeElement( 'div' )
2544                 );
2545
2546                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2547
2548                 // Put these up at the top to ensure they aren't lost on early form submission
2549                 $this->showFormBeforeText();
2550
2551                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2552                         $username = $this->lastDelete->user_name;
2553                         $comment = $this->lastDelete->log_comment;
2554
2555                         // It is better to not parse the comment at all than to have templates expanded in the middle
2556                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2557                         $key = $comment === ''
2558                                 ? 'confirmrecreate-noreason'
2559                                 : 'confirmrecreate';
2560                         $wgOut->addHTML(
2561                                 '<div class="mw-confirm-recreate">' .
2562                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2563                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2564                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2565                                 ) .
2566                                 '</div>'
2567                         );
2568                 }
2569
2570                 # When the summary is hidden, also hide them on preview/show changes
2571                 if ( $this->nosummary ) {
2572                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2573                 }
2574
2575                 # If a blank edit summary was previously provided, and the appropriate
2576                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2577                 # user being bounced back more than once in the event that a summary
2578                 # is not required.
2579                 # ####
2580                 # For a bit more sophisticated detection of blank summaries, hash the
2581                 # automatic one and pass that in the hidden field wpAutoSummary.
2582                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2583                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2584                 }
2585
2586                 if ( $this->undidRev ) {
2587                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2588                 }
2589
2590                 if ( $this->selfRedirect ) {
2591                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2592                 }
2593
2594                 if ( $this->hasPresetSummary ) {
2595                         // If a summary has been preset using &summary= we don't want to prompt for
2596                         // a different summary. Only prompt for a summary if the summary is blanked.
2597                         // (Bug 17416)
2598                         $this->autoSumm = md5( '' );
2599                 }
2600
2601                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2602                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2603
2604                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2605                 $wgOut->addHTML( Html::hidden( 'parentRevId', $this->getParentRevId() ) );
2606
2607                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2608                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2609
2610                 if ( $this->section == 'new' ) {
2611                         $this->showSummaryInput( true, $this->summary );
2612                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2613                 }
2614
2615                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2616
2617                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2618                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2619                 }
2620
2621                 if ( $this->blankArticle ) {
2622                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2623                 }
2624
2625                 if ( $this->isConflict ) {
2626                         // In an edit conflict bypass the overridable content form method
2627                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2628                         // resolved between page source edits and custom ui edits using the
2629                         // custom edit ui.
2630                         $this->textbox2 = $this->textbox1;
2631
2632                         $content = $this->getCurrentContent();
2633                         $this->textbox1 = $this->toEditText( $content );
2634
2635                         $this->showTextbox1();
2636                 } else {
2637                         $this->showContentForm();
2638                 }
2639
2640                 $wgOut->addHTML( $this->editFormTextAfterContent );
2641
2642                 $this->showStandardInputs();
2643
2644                 $this->showFormAfterText();
2645
2646                 $this->showTosSummary();
2647
2648                 $this->showEditTools();
2649
2650                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2651
2652                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2653                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2654
2655                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2656                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2657
2658                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2659                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2660
2661                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2662
2663                 if ( $this->isConflict ) {
2664                         try {
2665                                 $this->showConflict();
2666                         } catch ( MWContentSerializationException $ex ) {
2667                                 // this can't really happen, but be nice if it does.
2668                                 $msg = wfMessage(
2669                                         'content-failed-to-parse',
2670                                         $this->contentModel,
2671                                         $this->contentFormat,
2672                                         $ex->getMessage()
2673                                 );
2674                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2675                         }
2676                 }
2677
2678                 // Marker for detecting truncated form data.  This must be the last
2679                 // parameter sent in order to be of use, so do not move me.
2680                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2681                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2682
2683                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2684                         $this->displayPreviewArea( $previewOutput, false );
2685                 }
2686
2687         }
2688
2689         /**
2690          * Extract the section title from current section text, if any.
2691          *
2692          * @param string $text
2693          * @return string|bool String or false
2694          */
2695         public static function extractSectionTitle( $text ) {
2696                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2697                 if ( !empty( $matches[2] ) ) {
2698                         global $wgParser;
2699                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2700                 } else {
2701                         return false;
2702                 }
2703         }
2704
2705         /**
2706          * @return bool
2707          */
2708         protected function showHeader() {
2709                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2710                 global $wgAllowUserCss, $wgAllowUserJs;
2711
2712                 if ( $this->mTitle->isTalkPage() ) {
2713                         $wgOut->addWikiMsg( 'talkpagetext' );
2714                 }
2715
2716                 // Add edit notices
2717                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
2718                 if ( count( $editNotices ) ) {
2719                         $wgOut->addHTML( implode( "\n", $editNotices ) );
2720                 } else {
2721                         $msg = wfMessage( 'editnotice-notext' );
2722                         if ( !$msg->isDisabled() ) {
2723                                 $wgOut->addHTML(
2724                                         '<div class="mw-editnotice-notext">'
2725                                         . $msg->parseAsBlock()
2726                                         . '</div>'
2727                                 );
2728                         }
2729                 }
2730
2731                 if ( $this->isConflict ) {
2732                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2733                         $this->edittime = $this->mArticle->getTimestamp();
2734                 } else {
2735                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2736                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2737                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2738                                 // Someone is welcome to try refactoring though
2739                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2740                                 return false;
2741                         }
2742
2743                         if ( $this->section != '' && $this->section != 'new' ) {
2744                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2745                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2746                                         if ( $sectionTitle !== false ) {
2747                                                 $this->summary = "/* $sectionTitle */ ";
2748                                         }
2749                                 }
2750                         }
2751
2752                         if ( $this->missingComment ) {
2753                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2754                         }
2755
2756                         if ( $this->missingSummary && $this->section != 'new' ) {
2757                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2758                         }
2759
2760                         if ( $this->missingSummary && $this->section == 'new' ) {
2761                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2762                         }
2763
2764                         if ( $this->blankArticle ) {
2765                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2766                         }
2767
2768                         if ( $this->selfRedirect ) {
2769                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2770                         }
2771
2772                         if ( $this->hookError !== '' ) {
2773                                 $wgOut->addWikiText( $this->hookError );
2774                         }
2775
2776                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2777                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2778                         }
2779
2780                         if ( $this->section != 'new' ) {
2781                                 $revision = $this->mArticle->getRevisionFetched();
2782                                 if ( $revision ) {
2783                                         // Let sysop know that this will make private content public if saved
2784
2785                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2786                                                 $wgOut->wrapWikiMsg(
2787                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2788                                                         'rev-deleted-text-permission'
2789                                                 );
2790                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2791                                                 $wgOut->wrapWikiMsg(
2792                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2793                                                         'rev-deleted-text-view'
2794                                                 );
2795                                         }
2796
2797                                         if ( !$revision->isCurrent() ) {
2798                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2799                                                 $wgOut->addWikiMsg( 'editingold' );
2800                                         }
2801                                 } elseif ( $this->mTitle->exists() ) {
2802                                         // Something went wrong
2803
2804                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2805                                                 array( 'missing-revision', $this->oldid ) );
2806                                 }
2807                         }
2808                 }
2809
2810                 if ( wfReadOnly() ) {
2811                         $wgOut->wrapWikiMsg(
2812                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2813                                 array( 'readonlywarning', wfReadOnlyReason() )
2814                         );
2815                 } elseif ( $wgUser->isAnon() ) {
2816                         if ( $this->formtype != 'preview' ) {
2817                                 $wgOut->wrapWikiMsg(
2818                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2819                                         array( 'anoneditwarning',
2820                                                 // Log-in link
2821                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2822                                                 // Sign-up link
2823                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2824                                 );
2825                         } else {
2826                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2827                                         'anonpreviewwarning'
2828                                 );
2829                         }
2830                 } else {
2831                         if ( $this->isCssJsSubpage ) {
2832                                 # Check the skin exists
2833                                 if ( $this->isWrongCaseCssJsPage ) {
2834                                         $wgOut->wrapWikiMsg(
2835                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2836                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2837                                         );
2838                                 }
2839                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2840                                         if ( $this->formtype !== 'preview' ) {
2841                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2842                                                         $wgOut->wrapWikiMsg(
2843                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2844                                                                 array( 'usercssyoucanpreview' )
2845                                                         );
2846                                                 }
2847
2848                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
2849                                                         $wgOut->wrapWikiMsg(
2850                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2851                                                                 array( 'userjsyoucanpreview' )
2852                                                         );
2853                                                 }
2854                                         }
2855                                 }
2856                         }
2857                 }
2858
2859                 if ( $this->mTitle->isProtected( 'edit' ) &&
2860                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2861                 ) {
2862                         # Is the title semi-protected?
2863                         if ( $this->mTitle->isSemiProtected() ) {
2864                                 $noticeMsg = 'semiprotectedpagewarning';
2865                         } else {
2866                                 # Then it must be protected based on static groups (regular)
2867                                 $noticeMsg = 'protectedpagewarning';
2868                         }
2869                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2870                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2871                 }
2872                 if ( $this->mTitle->isCascadeProtected() ) {
2873                         # Is this page under cascading protection from some source pages?
2874                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2875                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2876                         $cascadeSourcesCount = count( $cascadeSources );
2877                         if ( $cascadeSourcesCount > 0 ) {
2878                                 # Explain, and list the titles responsible
2879                                 foreach ( $cascadeSources as $page ) {
2880                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2881                                 }
2882                         }
2883                         $notice .= '</div>';
2884                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2885                 }
2886                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2887                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2888                                 array( 'lim' => 1,
2889                                         'showIfEmpty' => false,
2890                                         'msgKey' => array( 'titleprotectedwarning' ),
2891                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2892                 }
2893
2894                 if ( $this->kblength === false ) {
2895                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2896                 }
2897
2898                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2899                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2900                                 array(
2901                                         'longpageerror',
2902                                         $wgLang->formatNum( $this->kblength ),
2903                                         $wgLang->formatNum( $wgMaxArticleSize )
2904                                 )
2905                         );
2906                 } else {
2907                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2908                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2909                                         array(
2910                                                 'longpage-hint',
2911                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2912                                                 strlen( $this->textbox1 )
2913                                         )
2914                                 );
2915                         }
2916                 }
2917                 # Add header copyright warning
2918                 $this->showHeaderCopyrightWarning();
2919
2920                 return true;
2921         }
2922
2923         /**
2924          * Standard summary input and label (wgSummary), abstracted so EditPage
2925          * subclasses may reorganize the form.
2926          * Note that you do not need to worry about the label's for=, it will be
2927          * inferred by the id given to the input. You can remove them both by
2928          * passing array( 'id' => false ) to $userInputAttrs.
2929          *
2930          * @param string $summary The value of the summary input
2931          * @param string $labelText The html to place inside the label
2932          * @param array $inputAttrs Array of attrs to use on the input
2933          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2934          *
2935          * @return array An array in the format array( $label, $input )
2936          */
2937         function getSummaryInput( $summary = "", $labelText = null,
2938                 $inputAttrs = null, $spanLabelAttrs = null
2939         ) {
2940                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2941                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2942                         'id' => 'wpSummary',
2943                         'maxlength' => '200',
2944                         'tabindex' => '1',
2945                         'size' => 60,
2946                         'spellcheck' => 'true',
2947                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2948
2949                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2950                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2951                         'id' => "wpSummaryLabel"
2952                 );
2953
2954                 $label = null;
2955                 if ( $labelText ) {
2956                         $label = Xml::tags(
2957                                 'label',
2958                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2959                                 $labelText
2960                         );
2961                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2962                 }
2963
2964                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2965
2966                 return array( $label, $input );
2967         }
2968
2969         /**
2970          * @param bool $isSubjectPreview True if this is the section subject/title
2971          *   up top, or false if this is the comment summary
2972          *   down below the textarea
2973          * @param string $summary The text of the summary to display
2974          */
2975         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2976                 global $wgOut, $wgContLang;
2977                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2978                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2979                 if ( $isSubjectPreview ) {
2980                         if ( $this->nosummary ) {
2981                                 return;
2982                         }
2983                 } else {
2984                         if ( !$this->mShowSummaryField ) {
2985                                 return;
2986                         }
2987                 }
2988                 $summary = $wgContLang->recodeForEdit( $summary );
2989                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2990                 list( $label, $input ) = $this->getSummaryInput(
2991                         $summary,
2992                         $labelText,
2993                         array( 'class' => $summaryClass ),
2994                         array()
2995                 );
2996                 $wgOut->addHTML( "{$label} {$input}" );
2997         }
2998
2999         /**
3000          * @param bool $isSubjectPreview True if this is the section subject/title
3001          *   up top, or false if this is the comment summary
3002          *   down below the textarea
3003          * @param string $summary The text of the summary to display
3004          * @return string
3005          */
3006         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
3007                 // avoid spaces in preview, gets always trimmed on save
3008                 $summary = trim( $summary );
3009                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
3010                         return "";
3011                 }
3012
3013                 global $wgParser;
3014
3015                 if ( $isSubjectPreview ) {
3016                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
3017                                 ->inContentLanguage()->text();
3018                 }
3019
3020                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3021
3022                 $summary = wfMessage( $message )->parse()
3023                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3024                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
3025         }
3026
3027         protected function showFormBeforeText() {
3028                 global $wgOut;
3029                 $section = htmlspecialchars( $this->section );
3030                 $wgOut->addHTML( <<<HTML
3031 <input type='hidden' value="{$section}" name="wpSection"/>
3032 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3033 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3034 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3035
3036 HTML
3037                 );
3038                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3039                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3040                 }
3041         }
3042
3043         protected function showFormAfterText() {
3044                 global $wgOut, $wgUser;
3045                 /**
3046                  * To make it harder for someone to slip a user a page
3047                  * which submits an edit form to the wiki without their
3048                  * knowledge, a random token is associated with the login
3049                  * session. If it's not passed back with the submission,
3050                  * we won't save the page, or render user JavaScript and
3051                  * CSS previews.
3052                  *
3053                  * For anon editors, who may not have a session, we just
3054                  * include the constant suffix to prevent editing from
3055                  * broken text-mangling proxies.
3056                  */
3057                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3058         }
3059
3060         /**
3061          * Subpage overridable method for printing the form for page content editing
3062          * By default this simply outputs wpTextbox1
3063          * Subclasses can override this to provide a custom UI for editing;
3064          * be it a form, or simply wpTextbox1 with a modified content that will be
3065          * reverse modified when extracted from the post data.
3066          * Note that this is basically the inverse for importContentFormData
3067          */
3068         protected function showContentForm() {
3069                 $this->showTextbox1();
3070         }
3071
3072         /**
3073          * Method to output wpTextbox1
3074          * The $textoverride method can be used by subclasses overriding showContentForm
3075          * to pass back to this method.
3076          *
3077          * @param array $customAttribs Array of html attributes to use in the textarea
3078          * @param string $textoverride Optional text to override $this->textarea1 with
3079          */
3080         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3081                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3082                         $attribs = array( 'style' => 'display:none;' );
3083                 } else {
3084                         $classes = array(); // Textarea CSS
3085                         if ( $this->mTitle->isProtected( 'edit' ) &&
3086                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
3087                         ) {
3088                                 # Is the title semi-protected?
3089                                 if ( $this->mTitle->isSemiProtected() ) {
3090                                         $classes[] = 'mw-textarea-sprotected';
3091                                 } else {
3092                                         # Then it must be protected based on static groups (regular)
3093                                         $classes[] = 'mw-textarea-protected';
3094                                 }
3095                                 # Is the title cascade-protected?
3096                                 if ( $this->mTitle->isCascadeProtected() ) {
3097                                         $classes[] = 'mw-textarea-cprotected';
3098                                 }
3099                         }
3100
3101                         $attribs = array( 'tabindex' => 1 );
3102
3103                         if ( is_array( $customAttribs ) ) {
3104                                 $attribs += $customAttribs;
3105                         }
3106
3107                         if ( count( $classes ) ) {
3108                                 if ( isset( $attribs['class'] ) ) {
3109                                         $classes[] = $attribs['class'];
3110                                 }
3111                                 $attribs['class'] = implode( ' ', $classes );
3112                         }
3113                 }
3114
3115                 $this->showTextbox(
3116                         $textoverride !== null ? $textoverride : $this->textbox1,
3117                         'wpTextbox1',
3118                         $attribs
3119                 );
3120         }
3121
3122         protected function showTextbox2() {
3123                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
3124         }
3125
3126         protected function showTextbox( $text, $name, $customAttribs = array() ) {
3127                 global $wgOut, $wgUser;
3128
3129                 $wikitext = $this->safeUnicodeOutput( $text );
3130                 if ( strval( $wikitext ) !== '' ) {
3131                         // Ensure there's a newline at the end, otherwise adding lines
3132                         // is awkward.
3133                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3134                         // mode will show an extra newline. A bit annoying.
3135                         $wikitext .= "\n";
3136                 }
3137
3138                 $attribs = $customAttribs + array(
3139                         'accesskey' => ',',
3140                         'id' => $name,
3141                         'cols' => $wgUser->getIntOption( 'cols' ),
3142                         'rows' => $wgUser->getIntOption( 'rows' ),
3143                         // Avoid PHP notices when appending preferences
3144                         // (appending allows customAttribs['style'] to still work).
3145                         'style' => ''
3146                 );
3147
3148                 $pageLang = $this->mTitle->getPageLanguage();
3149                 $attribs['lang'] = $pageLang->getHtmlCode();
3150                 $attribs['dir'] = $pageLang->getDir();
3151
3152                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3153         }
3154
3155         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3156                 global $wgOut;
3157                 $classes = array();
3158                 if ( $isOnTop ) {
3159                         $classes[] = 'ontop';
3160                 }
3161
3162                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3163
3164                 if ( $this->formtype != 'preview' ) {
3165                         $attribs['style'] = 'display: none;';
3166                 }
3167
3168                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3169
3170                 if ( $this->formtype == 'preview' ) {
3171                         $this->showPreview( $previewOutput );
3172                 } else {
3173                         // Empty content container for LivePreview
3174                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3175                         $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3176                                 'class' => 'mw-content-' . $pageViewLang->getDir() );
3177                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3178                 }
3179
3180                 $wgOut->addHTML( '</div>' );
3181
3182                 if ( $this->formtype == 'diff' ) {
3183                         try {
3184                                 $this->showDiff();
3185                         } catch ( MWContentSerializationException $ex ) {
3186                                 $msg = wfMessage(
3187                                         'content-failed-to-parse',
3188                                         $this->contentModel,
3189                                         $this->contentFormat,
3190                                         $ex->getMessage()
3191                                 );
3192                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3193                         }
3194                 }
3195         }
3196
3197         /**
3198          * Append preview output to $wgOut.
3199          * Includes category rendering if this is a category page.
3200          *
3201          * @param string $text The HTML to be output for the preview.
3202          */
3203         protected function showPreview( $text ) {
3204                 global $wgOut;
3205                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3206                         $this->mArticle->openShowCategory();
3207                 }
3208                 # This hook seems slightly odd here, but makes things more
3209                 # consistent for extensions.
3210                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3211                 $wgOut->addHTML( $text );
3212                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3213                         $this->mArticle->closeShowCategory();
3214                 }
3215         }
3216
3217         /**
3218          * Get a diff between the current contents of the edit box and the
3219          * version of the page we're editing from.
3220          *
3221          * If this is a section edit, we'll replace the section as for final
3222          * save and then make a comparison.
3223          */
3224         function showDiff() {
3225                 global $wgUser, $wgContLang, $wgOut;
3226
3227                 $oldtitlemsg = 'currentrev';
3228                 # if message does not exist, show diff against the preloaded default
3229                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3230                         $oldtext = $this->mTitle->getDefaultMessageText();
3231                         if ( $oldtext !== false ) {
3232                                 $oldtitlemsg = 'defaultmessagetext';
3233                                 $oldContent = $this->toEditContent( $oldtext );
3234                         } else {
3235                                 $oldContent = null;
3236                         }
3237                 } else {
3238                         $oldContent = $this->getCurrentContent();
3239                 }
3240
3241                 $textboxContent = $this->toEditContent( $this->textbox1 );
3242
3243                 $newContent = $this->mArticle->replaceSectionContent(
3244                                                         $this->section, $textboxContent,
3245                                                         $this->summary, $this->edittime );
3246
3247                 if ( $newContent ) {
3248                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3249                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3250
3251                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3252                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3253                 }
3254
3255                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3256                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3257                         $newtitle = wfMessage( 'yourtext' )->parse();
3258
3259                         if ( !$oldContent ) {
3260                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3261                         }
3262
3263                         if ( !$newContent ) {
3264                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3265                         }
3266
3267                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3268                         $de->setContent( $oldContent, $newContent );
3269
3270                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3271                         $de->showDiffStyle();
3272                 } else {
3273                         $difftext = '';
3274                 }
3275
3276                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3277         }
3278
3279         /**
3280          * Show the header copyright warning.
3281          */
3282         protected function showHeaderCopyrightWarning() {
3283                 $msg = 'editpage-head-copy-warn';
3284                 if ( !wfMessage( $msg )->isDisabled() ) {
3285                         global $wgOut;
3286                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3287                                 'editpage-head-copy-warn' );
3288                 }
3289         }
3290
3291         /**
3292          * Give a chance for site and per-namespace customizations of
3293          * terms of service summary link that might exist separately
3294          * from the copyright notice.
3295          *
3296          * This will display between the save button and the edit tools,
3297          * so should remain short!
3298          */
3299         protected function showTosSummary() {
3300                 $msg = 'editpage-tos-summary';
3301                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3302                 if ( !wfMessage( $msg )->isDisabled() ) {
3303                         global $wgOut;
3304                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3305                         $wgOut->addWikiMsg( $msg );
3306                         $wgOut->addHTML( '</div>' );
3307                 }
3308         }
3309
3310         protected function showEditTools() {
3311                 global $wgOut;
3312                 $wgOut->addHTML( '<div class="mw-editTools">' .
3313                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3314                         '</div>' );
3315         }
3316
3317         /**
3318          * Get the copyright warning
3319          *
3320          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3321          * @return string
3322          */
3323         protected function getCopywarn() {
3324                 return self::getCopyrightWarning( $this->mTitle );
3325         }
3326
3327         /**
3328          * Get the copyright warning, by default returns wikitext
3329          *
3330          * @param Title $title
3331          * @param string $format Output format, valid values are any function of a Message object
3332          * @return string
3333          */
3334         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3335                 global $wgRightsText;
3336                 if ( $wgRightsText ) {
3337                         $copywarnMsg = array( 'copyrightwarning',
3338                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3339                                 $wgRightsText );
3340                 } else {
3341                         $copywarnMsg = array( 'copyrightwarning2',
3342                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3343                 }
3344                 // Allow for site and per-namespace customization of contribution/copyright notice.
3345                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3346
3347                 return "<div id=\"editpage-copywarn\">\n" .
3348                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3349         }
3350
3351         /**
3352          * Get the Limit report for page previews
3353          *
3354          * @since 1.22
3355          * @param ParserOutput $output ParserOutput object from the parse
3356          * @return string HTML
3357          */
3358         public static function getPreviewLimitReport( $output ) {
3359                 if ( !$output || !$output->getLimitReportData() ) {
3360                         return '';
3361                 }
3362
3363                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3364                         wfMessage( 'limitreport-title' )->parseAsBlock()
3365                 );
3366
3367                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3368                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3369
3370                 $limitReport .= Html::openElement( 'table', array(
3371                         'class' => 'preview-limit-report wikitable'
3372                 ) ) .
3373                         Html::openElement( 'tbody' );
3374
3375                 foreach ( $output->getLimitReportData() as $key => $value ) {
3376                         if ( Hooks::run( 'ParserLimitReportFormat',
3377                                 array( $key, &$value, &$limitReport, true, true )
3378                         ) ) {
3379                                 $keyMsg = wfMessage( $key );
3380                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3381                                 if ( !$valueMsg->exists() ) {
3382                                         $valueMsg = new RawMessage( '$1' );
3383                                 }
3384                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3385                                         $limitReport .= Html::openElement( 'tr' ) .
3386                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3387                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3388                                                 Html::closeElement( 'tr' );
3389                                 }
3390                         }
3391                 }
3392
3393                 $limitReport .= Html::closeElement( 'tbody' ) .
3394                         Html::closeElement( 'table' ) .
3395                         Html::closeElement( 'div' );
3396
3397                 return $limitReport;
3398         }
3399
3400         protected function showStandardInputs( &$tabindex = 2 ) {
3401                 global $wgOut;
3402                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3403
3404                 if ( $this->section != 'new' ) {
3405                         $this->showSummaryInput( false, $this->summary );
3406                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3407                 }
3408
3409                 $checkboxes = $this->getCheckboxes( $tabindex,
3410                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3411                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3412
3413                 // Show copyright warning.
3414                 $wgOut->addWikiText( $this->getCopywarn() );
3415                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3416
3417                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3418                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3419
3420                 $cancel = $this->getCancelLink();
3421                 if ( $cancel !== '' ) {
3422                         $cancel .= Html::element( 'span',
3423                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3424                                 wfMessage( 'pipe-separator' )->text() );
3425                 }
3426
3427                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3428                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3429                 $attrs = array(
3430                         'target' => 'helpwindow',
3431                         'href' => $edithelpurl,
3432                 );
3433                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3434                         $attrs, array( 'mw-ui-quiet' ) ) .
3435                         wfMessage( 'word-separator' )->escaped() .
3436                         wfMessage( 'newwindow' )->parse();
3437
3438                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3439                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3440                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3441
3442                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3443
3444                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3445         }
3446
3447         /**
3448          * Show an edit conflict. textbox1 is already shown in showEditForm().
3449          * If you want to use another entry point to this function, be careful.
3450          */
3451         protected function showConflict() {
3452                 global $wgOut;
3453
3454                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3455                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3456
3457                         $content1 = $this->toEditContent( $this->textbox1 );
3458                         $content2 = $this->toEditContent( $this->textbox2 );
3459
3460                         $handler = ContentHandler::getForModelID( $this->contentModel );
3461                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3462                         $de->setContent( $content2, $content1 );
3463                         $de->showDiff(
3464                                 wfMessage( 'yourtext' )->parse(),
3465                                 wfMessage( 'storedversion' )->text()
3466                         );
3467
3468                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3469                         $this->showTextbox2();
3470                 }
3471         }
3472
3473         /**
3474          * @return string
3475          */
3476         public function getCancelLink() {
3477                 $cancelParams = array();
3478                 if ( !$this->isConflict && $this->oldid > 0 ) {
3479                         $cancelParams['oldid'] = $this->oldid;
3480                 }
3481                 $attrs = array( 'id' => 'mw-editform-cancel' );
3482
3483                 return Linker::linkKnown(
3484                         $this->getContextTitle(),
3485                         wfMessage( 'cancel' )->parse(),
3486                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3487                         $cancelParams
3488                 );
3489         }
3490
3491         /**
3492          * Returns the URL to use in the form's action attribute.
3493          * This is used by EditPage subclasses when simply customizing the action
3494          * variable in the constructor is not enough. This can be used when the
3495          * EditPage lives inside of a Special page rather than a custom page action.
3496          *
3497          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3498          * @return string
3499          */
3500         protected function getActionURL( Title $title ) {
3501                 return $title->getLocalURL( array( 'action' => $this->action ) );
3502         }
3503
3504         /**
3505          * Check if a page was deleted while the user was editing it, before submit.
3506          * Note that we rely on the logging table, which hasn't been always there,
3507          * but that doesn't matter, because this only applies to brand new
3508          * deletes.
3509          * @return bool
3510          */
3511         protected function wasDeletedSinceLastEdit() {
3512                 if ( $this->deletedSinceEdit !== null ) {
3513                         return $this->deletedSinceEdit;
3514                 }
3515
3516                 $this->deletedSinceEdit = false;
3517
3518                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3519                         $this->lastDelete = $this->getLastDelete();
3520                         if ( $this->lastDelete ) {
3521                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3522                                 if ( $deleteTime > $this->starttime ) {
3523                                         $this->deletedSinceEdit = true;
3524                                 }
3525                         }
3526                 }
3527
3528                 return $this->deletedSinceEdit;
3529         }
3530
3531         /**
3532          * @return bool|stdClass
3533          */
3534         protected function getLastDelete() {
3535                 $dbr = wfGetDB( DB_SLAVE );
3536                 $data = $dbr->selectRow(
3537                         array( 'logging', 'user' ),
3538                         array(
3539                                 'log_type',
3540                                 'log_action',
3541                                 'log_timestamp',
3542                                 'log_user',
3543                                 'log_namespace',
3544                                 'log_title',
3545                                 'log_comment',
3546                                 'log_params',
3547                                 'log_deleted',
3548                                 'user_name'
3549                         ), array(
3550                                 'log_namespace' => $this->mTitle->getNamespace(),
3551                                 'log_title' => $this->mTitle->getDBkey(),
3552                                 'log_type' => 'delete',
3553                                 'log_action' => 'delete',
3554                                 'user_id=log_user'
3555                         ),
3556                         __METHOD__,
3557                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3558                 );
3559                 // Quick paranoid permission checks...
3560                 if ( is_object( $data ) ) {
3561                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3562                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3563                         }
3564
3565                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3566                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3567                         }
3568                 }
3569
3570                 return $data;
3571         }
3572
3573         /**
3574          * Get the rendered text for previewing.
3575          * @throws MWException
3576          * @return string
3577          */
3578         function getPreviewText() {
3579                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3580                 global $wgAllowUserCss, $wgAllowUserJs;
3581
3582                 $stats = $wgOut->getContext()->getStats();
3583
3584                 if ( $wgRawHtml && !$this->mTokenOk ) {
3585                         // Could be an offsite preview attempt. This is very unsafe if
3586                         // HTML is enabled, as it could be an attack.
3587                         $parsedNote = '';
3588                         if ( $this->textbox1 !== '' ) {
3589                                 // Do not put big scary notice, if previewing the empty
3590                                 // string, which happens when you initially edit
3591                                 // a category page, due to automatic preview-on-open.
3592                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3593                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3594                         }
3595                         $stats->increment( 'edit.failures.session_loss' );
3596                         return $parsedNote;
3597                 }
3598
3599                 $note = '';
3600
3601                 try {
3602                         $content = $this->toEditContent( $this->textbox1 );
3603
3604                         $previewHTML = '';
3605                         if ( !Hooks::run(
3606                                 'AlternateEditPreview',
3607                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3608                         ) {
3609                                 return $previewHTML;
3610                         }
3611
3612                         # provide a anchor link to the editform
3613                         $continueEditing = '<span class="mw-continue-editing">' .
3614                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3615                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3616                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3617                                 if ( $this->mTokenOkExceptSuffix ) {
3618                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3619                                         $stats->increment( 'edit.failures.bad_token' );
3620                                 } else {
3621                                         $note = wfMessage( 'session_fail_preview' )->plain();
3622                                         $stats->increment( 'edit.failures.session_loss' );
3623                                 }
3624                         } elseif ( $this->incompleteForm ) {
3625                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3626                                 if ( $this->mTriedSave ) {
3627                                         $stats->increment( 'edit.failures.incomplete_form' );
3628                                 }
3629                         } else {
3630                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3631                         }
3632
3633                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3634                         $parserOptions->setIsPreview( true );
3635                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3636
3637                         # don't parse non-wikitext pages, show message about preview
3638                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3639                                 if ( $this->mTitle->isCssJsSubpage() ) {
3640                                         $level = 'user';
3641                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3642                                         $level = 'site';
3643                                 } else {
3644                                         $level = false;
3645                                 }
3646
3647                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3648                                         $format = 'css';
3649                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3650                                                 $format = false;
3651                                         }
3652                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3653                                         $format = 'js';
3654                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3655                                                 $format = false;
3656                                         }
3657                                 } else {
3658                                         $format = false;
3659                                 }
3660
3661                                 # Used messages to make sure grep find them:
3662                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3663                                 if ( $level && $format ) {
3664                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3665                                                 wfMessage( "{$level}{$format}preview" )->text() .
3666                                                 ' ' . $continueEditing . "</div>";
3667                                 }
3668                         }
3669
3670                         # If we're adding a comment, we need to show the
3671                         # summary as the headline
3672                         if ( $this->section === "new" && $this->summary !== "" ) {
3673                                 $content = $content->addSectionHeader( $this->summary );
3674                         }
3675
3676                         $hook_args = array( $this, &$content );
3677                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3678                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3679
3680                         $parserOptions->enableLimitReport();
3681
3682                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3683                         # But it's now deprecated, so never mind
3684
3685                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3686                         $scopedCallback = $parserOptions->setupFakeRevision(
3687                                 $this->mTitle, $pstContent, $wgUser );
3688                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3689
3690                         # Try to stash the edit for the final submission step
3691                         # @todo: different date format preferences cause cache misses
3692                         ApiStashEdit::stashEditFromPreview(
3693                                 $this->getArticle(), $content, $pstContent,
3694                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3695                         );
3696
3697                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3698                         $previewHTML = $parserOutput->getText();
3699                         $this->mParserOutput = $parserOutput;
3700                         $wgOut->addParserOutputMetadata( $parserOutput );
3701
3702                         if ( count( $parserOutput->getWarnings() ) ) {
3703                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3704                         }
3705                 } catch ( MWContentSerializationException $ex ) {
3706                         $m = wfMessage(
3707                                 'content-failed-to-parse',
3708                                 $this->contentModel,
3709                                 $this->contentFormat,
3710                                 $ex->getMessage()
3711                         );
3712                         $note .= "\n\n" . $m->parse();
3713                         $previewHTML = '';
3714                 }
3715
3716                 if ( $this->isConflict ) {
3717                         $conflict = '<h2 id="mw-previewconflict">'
3718                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3719                 } else {
3720                         $conflict = '<hr />';
3721                 }
3722
3723                 $previewhead = "<div class='previewnote'>\n" .
3724                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3725                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3726
3727                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3728                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3729                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3730                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3731
3732                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3733         }
3734
3735         /**
3736          * @return array
3737          */
3738         function getTemplates() {
3739                 if ( $this->preview || $this->section != '' ) {
3740                         $templates = array();
3741                         if ( !isset( $this->mParserOutput ) ) {
3742                                 return $templates;
3743                         }
3744                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3745                                 foreach ( array_keys( $template ) as $dbk ) {
3746                                         $templates[] = Title::makeTitle( $ns, $dbk );
3747                                 }
3748                         }
3749                         return $templates;
3750                 } else {
3751                         return $this->mTitle->getTemplateLinksFrom();
3752                 }
3753         }
3754
3755         /**
3756          * Shows a bulletin board style toolbar for common editing functions.
3757          * It can be disabled in the user preferences.
3758          *
3759          * @param $title Title object for the page being edited (optional)
3760          * @return string
3761          */
3762         static function getEditToolbar( $title = null ) {
3763                 global $wgContLang, $wgOut;
3764                 global $wgEnableUploads, $wgForeignFileRepos;
3765
3766                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3767                 $showSignature = true;
3768                 if ( $title ) {
3769                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3770                 }
3771
3772                 /**
3773                  * $toolarray is an array of arrays each of which includes the
3774                  * opening tag, the closing tag, optionally a sample text that is
3775                  * inserted between the two when no selection is highlighted
3776                  * and.  The tip text is shown when the user moves the mouse
3777                  * over the button.
3778                  *
3779                  * Images are defined in ResourceLoaderEditToolbarModule.
3780                  */
3781                 $toolarray = array(
3782                         array(
3783                                 'id'     => 'mw-editbutton-bold',
3784                                 'open'   => '\'\'\'',
3785                                 'close'  => '\'\'\'',
3786                                 'sample' => wfMessage( 'bold_sample' )->text(),
3787                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3788                         ),
3789                         array(
3790                                 'id'     => 'mw-editbutton-italic',
3791                                 'open'   => '\'\'',
3792                                 'close'  => '\'\'',
3793                                 'sample' => wfMessage( 'italic_sample' )->text(),
3794                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3795                         ),
3796                         array(
3797                                 'id'     => 'mw-editbutton-link',
3798                                 'open'   => '[[',
3799                                 'close'  => ']]',
3800                                 'sample' => wfMessage( 'link_sample' )->text(),
3801                                 'tip'    => wfMessage( 'link_tip' )->text(),
3802                         ),
3803                         array(
3804                                 'id'     => 'mw-editbutton-extlink',
3805                                 'open'   => '[',
3806                                 'close'  => ']',
3807                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3808                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3809                         ),
3810                         array(
3811                                 'id'     => 'mw-editbutton-headline',
3812                                 'open'   => "\n== ",
3813                                 'close'  => " ==\n",
3814                                 'sample' => wfMessage( 'headline_sample' )->text(),
3815                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3816                         ),
3817                         $imagesAvailable ? array(
3818                                 'id'     => 'mw-editbutton-image',
3819                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3820                                 'close'  => ']]',
3821                                 'sample' => wfMessage( 'image_sample' )->text(),
3822                                 'tip'    => wfMessage( 'image_tip' )->text(),
3823                         ) : false,
3824                         $imagesAvailable ? array(
3825                                 'id'     => 'mw-editbutton-media',
3826                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3827                                 'close'  => ']]',
3828                                 'sample' => wfMessage( 'media_sample' )->text(),
3829                                 'tip'    => wfMessage( 'media_tip' )->text(),
3830                         ) : false,
3831                         array(
3832                                 'id'     => 'mw-editbutton-nowiki',
3833                                 'open'   => "<nowiki>",
3834                                 'close'  => "</nowiki>",
3835                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3836                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3837                         ),
3838                         $showSignature ? array(
3839                                 'id'     => 'mw-editbutton-signature',
3840                                 'open'   => '--~~~~',
3841                                 'close'  => '',
3842                                 'sample' => '',
3843                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3844                         ) : false,
3845                         array(
3846                                 'id'     => 'mw-editbutton-hr',
3847                                 'open'   => "\n----\n",
3848                                 'close'  => '',
3849                                 'sample' => '',
3850                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3851                         )
3852                 );
3853
3854                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3855                 foreach ( $toolarray as $tool ) {
3856                         if ( !$tool ) {
3857                                 continue;
3858                         }
3859
3860                         $params = array(
3861                                 // Images are defined in ResourceLoaderEditToolbarModule
3862                                 false,
3863                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3864                                 // Older browsers show a "speedtip" type message only for ALT.
3865                                 // Ideally these should be different, realistically they
3866                                 // probably don't need to be.
3867                                 $tool['tip'],
3868                                 $tool['open'],
3869                                 $tool['close'],
3870                                 $tool['sample'],
3871                                 $tool['id'],
3872                         );
3873
3874                         $script .= Xml::encodeJsCall(
3875                                 'mw.toolbar.addButton',
3876                                 $params,
3877                                 ResourceLoader::inDebugMode()
3878                         );
3879                 }
3880
3881                 $script .= '});';
3882                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
3883
3884                 $toolbar = '<div id="toolbar"></div>';
3885
3886                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3887
3888                 return $toolbar;
3889         }
3890
3891         /**
3892          * Returns an array of html code of the following checkboxes:
3893          * minor and watch
3894          *
3895          * @param int $tabindex Current tabindex
3896          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3897          *                 status of the checkbox
3898          *
3899          * @return array
3900          */
3901         public function getCheckboxes( &$tabindex, $checked ) {
3902                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3903
3904                 $checkboxes = array();
3905
3906                 // don't show the minor edit checkbox if it's a new page or section
3907                 if ( !$this->isNew ) {
3908                         $checkboxes['minor'] = '';
3909                         $minorLabel = wfMessage( 'minoredit' )->parse();
3910                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3911                                 $attribs = array(
3912                                         'tabindex' => ++$tabindex,
3913                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3914                                         'id' => 'wpMinoredit',
3915                                 );
3916                                 $minorEditHtml =
3917                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3918                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3919                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3920                                         ">{$minorLabel}</label>";
3921
3922                                 if ( $wgUseMediaWikiUIEverywhere ) {
3923                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3924                                                 $minorEditHtml .
3925                                         Html::closeElement( 'div' );
3926                                 } else {
3927                                         $checkboxes['minor'] = $minorEditHtml;
3928                                 }
3929                         }
3930                 }
3931
3932                 $watchLabel = wfMessage( 'watchthis' )->parse();
3933                 $checkboxes['watch'] = '';
3934                 if ( $wgUser->isLoggedIn() ) {
3935                         $attribs = array(
3936                                 'tabindex' => ++$tabindex,
3937                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3938                                 'id' => 'wpWatchthis',
3939                         );
3940                         $watchThisHtml =
3941                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3942                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3943                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3944                                 ">{$watchLabel}</label>";
3945                         if ( $wgUseMediaWikiUIEverywhere ) {
3946                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3947                                         $watchThisHtml .
3948                                         Html::closeElement( 'div' );
3949                         } else {
3950                                 $checkboxes['watch'] = $watchThisHtml;
3951                         }
3952                 }
3953                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3954                 return $checkboxes;
3955         }
3956
3957         /**
3958          * Returns an array of html code of the following buttons:
3959          * save, diff, preview and live
3960          *
3961          * @param int $tabindex Current tabindex
3962          *
3963          * @return array
3964          */
3965         public function getEditButtons( &$tabindex ) {
3966                 $buttons = array();
3967
3968                 $attribs = array(
3969                         'id' => 'wpSave',
3970                         'name' => 'wpSave',
3971                         'tabindex' => ++$tabindex,
3972                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3973                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3974                         $attribs, array( 'mw-ui-constructive' ) );
3975
3976                 ++$tabindex; // use the same for preview and live preview
3977                 $attribs = array(
3978                         'id' => 'wpPreview',
3979                         'name' => 'wpPreview',
3980                         'tabindex' => $tabindex,
3981                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3982                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3983                         $attribs );
3984                 $buttons['live'] = '';
3985
3986                 $attribs = array(
3987                         'id' => 'wpDiff',
3988                         'name' => 'wpDiff',
3989                         'tabindex' => ++$tabindex,
3990                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3991                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3992                         $attribs );
3993
3994                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3995                 return $buttons;
3996         }
3997
3998         /**
3999          * Creates a basic error page which informs the user that
4000          * they have attempted to edit a nonexistent section.
4001          */
4002         function noSuchSectionPage() {
4003                 global $wgOut;
4004
4005                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
4006
4007                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
4008                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
4009                 $wgOut->addHTML( $res );
4010
4011                 $wgOut->returnToMain( false, $this->mTitle );
4012         }
4013
4014         /**
4015          * Show "your edit contains spam" page with your diff and text
4016          *
4017          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4018          */
4019         public function spamPageWithContent( $match = false ) {
4020                 global $wgOut, $wgLang;
4021                 $this->textbox2 = $this->textbox1;
4022
4023                 if ( is_array( $match ) ) {
4024                         $match = $wgLang->listToText( $match );
4025                 }
4026                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
4027
4028                 $wgOut->addHTML( '<div id="spamprotected">' );
4029                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4030                 if ( $match ) {
4031                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4032                 }
4033                 $wgOut->addHTML( '</div>' );
4034
4035                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4036                 $this->showDiff();
4037
4038                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4039                 $this->showTextbox2();
4040
4041                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
4042         }
4043
4044         /**
4045          * Check if the browser is on a blacklist of user-agents known to
4046          * mangle UTF-8 data on form submission. Returns true if Unicode
4047          * should make it through, false if it's known to be a problem.
4048          * @return bool
4049          */
4050         private function checkUnicodeCompliantBrowser() {
4051                 global $wgBrowserBlackList, $wgRequest;
4052
4053                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4054                 if ( $currentbrowser === false ) {
4055                         // No User-Agent header sent? Trust it by default...
4056                         return true;
4057                 }
4058
4059                 foreach ( $wgBrowserBlackList as $browser ) {
4060                         if ( preg_match( $browser, $currentbrowser ) ) {
4061                                 return false;
4062                         }
4063                 }
4064                 return true;
4065         }
4066
4067         /**
4068          * Filter an input field through a Unicode de-armoring process if it
4069          * came from an old browser with known broken Unicode editing issues.
4070          *
4071          * @param WebRequest $request
4072          * @param string $field
4073          * @return string
4074          */
4075         protected function safeUnicodeInput( $request, $field ) {
4076                 $text = rtrim( $request->getText( $field ) );
4077                 return $request->getBool( 'safemode' )
4078                         ? $this->unmakeSafe( $text )
4079                         : $text;
4080         }
4081
4082         /**
4083          * Filter an output field through a Unicode armoring process if it is
4084          * going to an old browser with known broken Unicode editing issues.
4085          *
4086          * @param string $text
4087          * @return string
4088          */
4089         protected function safeUnicodeOutput( $text ) {
4090                 global $wgContLang;
4091                 $codedText = $wgContLang->recodeForEdit( $text );
4092                 return $this->checkUnicodeCompliantBrowser()
4093                         ? $codedText
4094                         : $this->makeSafe( $codedText );
4095         }
4096
4097         /**
4098          * A number of web browsers are known to corrupt non-ASCII characters
4099          * in a UTF-8 text editing environment. To protect against this,
4100          * detected browsers will be served an armored version of the text,
4101          * with non-ASCII chars converted to numeric HTML character references.
4102          *
4103          * Preexisting such character references will have a 0 added to them
4104          * to ensure that round-trips do not alter the original data.
4105          *
4106          * @param string $invalue
4107          * @return string
4108          */
4109         private function makeSafe( $invalue ) {
4110                 // Armor existing references for reversibility.
4111                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4112
4113                 $bytesleft = 0;
4114                 $result = "";
4115                 $working = 0;
4116                 $valueLength = strlen( $invalue );
4117                 for ( $i = 0; $i < $valueLength; $i++ ) {
4118                         $bytevalue = ord( $invalue[$i] );
4119                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4120                                 $result .= chr( $bytevalue );
4121                                 $bytesleft = 0;
4122                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4123                                 $working = $working << 6;
4124                                 $working += ( $bytevalue & 0x3F );
4125                                 $bytesleft--;
4126                                 if ( $bytesleft <= 0 ) {
4127                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4128                                 }
4129                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4130                                 $working = $bytevalue & 0x1F;
4131                                 $bytesleft = 1;
4132                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4133                                 $working = $bytevalue & 0x0F;
4134                                 $bytesleft = 2;
4135                         } else { // 1111 0xxx
4136                                 $working = $bytevalue & 0x07;
4137                                 $bytesleft = 3;
4138                         }
4139                 }
4140                 return $result;
4141         }
4142
4143         /**
4144          * Reverse the previously applied transliteration of non-ASCII characters
4145          * back to UTF-8. Used to protect data from corruption by broken web browsers
4146          * as listed in $wgBrowserBlackList.
4147          *
4148          * @param string $invalue
4149          * @return string
4150          */
4151         private function unmakeSafe( $invalue ) {
4152                 $result = "";
4153                 $valueLength = strlen( $invalue );
4154                 for ( $i = 0; $i < $valueLength; $i++ ) {
4155                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4156                                 $i += 3;
4157                                 $hexstring = "";
4158                                 do {
4159                                         $hexstring .= $invalue[$i];
4160                                         $i++;
4161                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4162
4163                                 // Do some sanity checks. These aren't needed for reversibility,
4164                                 // but should help keep the breakage down if the editor
4165                                 // breaks one of the entities whilst editing.
4166                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4167                                         $codepoint = hexdec( $hexstring );
4168                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4169                                 } else {
4170                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4171                                 }
4172                         } else {
4173                                 $result .= substr( $invalue, $i, 1 );
4174                         }
4175                 }
4176                 // reverse the transform that we made for reversibility reasons.
4177                 return strtr( $result, array( "&#x0" => "&#x" ) );
4178         }
4179 }