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