includes/EditPage.php

   1 <?php
   2 /**
   3  * Page edition user interface.
   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: User cannot edit? (not used)
  71          */
  72         const AS_USER_CANNOT_EDIT = 217;
  73
  74         /**
  75          * Status: this anonymous user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_ANON = 218;
  78
  79         /**
  80          * Status: this logged in user is not allowed to edit this page
  81          */
  82         const AS_READ_ONLY_PAGE_LOGGED = 219;
  83
  84         /**
  85          * Status: wiki is in readonly mode (wfReadOnly() == true)
  86          */
  87         const AS_READ_ONLY_PAGE = 220;
  88
  89         /**
  90          * Status: rate limiter for action 'edit' was tripped
  91          */
  92         const AS_RATE_LIMITED = 221;
  93
  94         /**
  95          * Status: article was deleted while editing and param wpRecreate == false or form
  96          * was not posted
  97          */
  98         const AS_ARTICLE_WAS_DELETED = 222;
  99
 100         /**
 101          * Status: user tried to create this page, but is not allowed to do that
 102          * ( Title->userCan('create') == false )
 103          */
 104         const AS_NO_CREATE_PERMISSION = 223;
 105
 106         /**
 107          * Status: user tried to create a blank page
 108          */
 109         const AS_BLANK_ARTICLE = 224;
 110
 111         /**
 112          * Status: (non-resolvable) edit conflict
 113          */
 114         const AS_CONFLICT_DETECTED = 225;
 115
 116         /**
 117          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 118          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 119          */
 120         const AS_SUMMARY_NEEDED = 226;
 121
 122         /**
 123          * Status: user tried to create a new section without content
 124          */
 125         const AS_TEXTBOX_EMPTY = 228;
 126
 127         /**
 128          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 129          */
 130         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 131
 132         /**
 133          * not used
 134          */
 135         const AS_OK = 230;
 136
 137         /**
 138          * Status: WikiPage::doEdit() was unsuccessful
 139          */
 140         const AS_END = 231;
 141
 142         /**
 143          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 144          */
 145         const AS_SPAM_ERROR = 232;
 146
 147         /**
 148          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 149          */
 150         const AS_IMAGE_REDIRECT_ANON = 233;
 151
 152         /**
 153          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 154          */
 155         const AS_IMAGE_REDIRECT_LOGGED = 234;
 156
 157         /**
 158          * Status: can't parse content
 159          */
 160         const AS_PARSE_ERROR = 240;
 161
 162         /**
 163          * HTML id and name for the beginning of the edit form.
 164          */
 165         const EDITFORM_ID = 'editform';
 166
 167         /**
 168          * Prefix of key for cookie used to pass post-edit state.
 169          * The revision id edited is added after this
 170          */
 171         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 172
 173         /**
 174          * Duration of PostEdit cookie, in seconds.
 175          * The cookie will be removed instantly if the JavaScript runs.
 176          *
 177          * Otherwise, though, we don't want the cookies to accumulate.
 178          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 179          * limit of only 20 cookies per domain. This still applies at least to some
 180          * versions of IE without full updates:
 181          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 182          *
 183          * A value of 20 minutes should be enough to take into account slow loads and minor
 184          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 185          */
 186         const POST_EDIT_COOKIE_DURATION = 1200;
 187
 188         /** @var Article */
 189         public $mArticle;
 190
 191         /** @var Title */
 192         public $mTitle;
 193
 194         /** @var null|Title */
 195         private $mContextTitle = null;
 196
 197         /** @var string */
 198         protected $action = 'submit';
 199
 200         /** @var bool */
 201         public $isConflict = false;
 202
 203         /** @var bool */
 204         public $isCssJsSubpage = false;
 205
 206         /** @var bool */
 207         public $isCssSubpage = false;
 208
 209         /** @var bool */
 210         public $isJsSubpage = false;
 211
 212         /** @var bool */
 213         protected $isWrongCaseCssJsPage = false;
 214
 215         /** @var bool New page or new section */
 216         protected $isNew = false;
 217
 218         /** @var bool */
 219         protected $deletedSinceEdit;
 220
 221         /** @var string */
 222         public $formtype;
 223
 224         /** @var bool */
 225         public $firsttime;
 226
 227         /** @var bool|stdClass */
 228         protected $lastDelete;
 229
 230         /** @var bool */
 231         protected $mTokenOk = false;
 232
 233         /** @var bool */
 234         protected $mTokenOkExceptSuffix = false;
 235
 236         /** @var bool */
 237         protected $mTriedSave = false;
 238
 239         /** @var bool */
 240         protected $incompleteForm = false;
 241
 242         /** @var bool */
 243         protected $tooBig = false;
 244
 245         /** @var bool */
 246         protected $kblength = false;
 247
 248         /** @var bool */
 249         protected $missingComment = false;
 250
 251         /** @var bool */
 252         protected $missingSummary = false;
 253
 254         /** @var bool */
 255         protected $allowBlankSummary = false;
 256
 257         /** @var string */
 258         protected $autoSumm = '';
 259
 260         /** @var string */
 261         public $hookError = '';
 262
 263         /** @var ParserOutput */
 264         protected $mParserOutput;
 265
 266         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 267         protected $hasPresetSummary = false;
 268
 269         /** @var bool */
 270         protected $mBaseRevision = false;
 271
 272         /** @var bool */
 273         public $mShowSummaryField = true;
 274
 275         # Form values
 276
 277         /** @var bool */
 278         public $save = false;
 279
 280         /** @var bool */
 281         public $preview = false;
 282
 283         /** @var bool */
 284         protected $diff = false;
 285
 286         /** @var bool */
 287         public $minoredit = false;
 288
 289         /** @var bool */
 290         protected $watchthis = false;
 291
 292         /** @var bool */
 293         protected $recreate = false;
 294
 295         /** @var string */
 296         public $textbox1 = '';
 297
 298         /** @var string */
 299         public $textbox2 = '';
 300
 301         /** @var string */
 302         public $summary = '';
 303
 304         /** @var bool */
 305         protected $nosummary = false;
 306
 307         /** @var string */
 308         public $edittime = '';
 309
 310         /** @var string */
 311         public $section = '';
 312
 313         /** @var string */
 314         public $sectiontitle = '';
 315
 316         /** @var string */
 317         protected $starttime = '';
 318
 319         /** @var int */
 320         public $oldid = 0;
 321
 322         /** @var string */
 323         protected $editintro = '';
 324
 325         /** @var null */
 326         public $scrolltop = null;
 327
 328         /** @var bool */
 329         public $bot = true;
 330
 331         /** @var null|string */
 332         public $contentModel = null;
 333
 334         /** @var null|string */
 335         public $contentFormat = null;
 336
 337         # Placeholders for text injection by hooks (must be HTML)
 338         # extensions should take care to _append_ to the present value
 339
 340         /** @var string Before even the preview */
 341         public $editFormPageTop = '';
 342         public $editFormTextTop = '';
 343         public $editFormTextBeforeContent = '';
 344         public $editFormTextAfterWarn = '';
 345         public $editFormTextAfterTools = '';
 346         public $editFormTextBottom = '';
 347         public $editFormTextAfterContent = '';
 348         public $previewTextAfterContent = '';
 349         public $mPreloadContent = null;
 350
 351         /* $didSave should be set to true whenever an article was successfully altered. */
 352         public $didSave = false;
 353         public $undidRev = 0;
 354
 355         public $suppressIntro = false;
 356
 357         /** @var bool Set to true to allow editing of non-text content types. */
 358         public $allowNonTextContent = false;
 359
 360         /** @var bool */
 361         protected $edit;
 362
 363         /** @var bool */
 364         public $live;
 365
 366         /**
 367          * @param Article $article
 368          */
 369         public function __construct( Article $article ) {
 370                 $this->mArticle = $article;
 371                 $this->mTitle = $article->getTitle();
 372
 373                 $this->contentModel = $this->mTitle->getContentModel();
 374
 375                 $handler = ContentHandler::getForModelID( $this->contentModel );
 376                 $this->contentFormat = $handler->getDefaultFormat();
 377         }
 378
 379         /**
 380          * @return Article
 381          */
 382         public function getArticle() {
 383                 return $this->mArticle;
 384         }
 385
 386         /**
 387          * @since 1.19
 388          * @return Title
 389          */
 390         public function getTitle() {
 391                 return $this->mTitle;
 392         }
 393
 394         /**
 395          * Set the context Title object
 396          *
 397          * @param Title|null $title Title object or null
 398          */
 399         public function setContextTitle( $title ) {
 400                 $this->mContextTitle = $title;
 401         }
 402
 403         /**
 404          * Get the context title object.
 405          * If not set, $wgTitle will be returned. This behavior might change in
 406          * the future to return $this->mTitle instead.
 407          *
 408          * @return Title
 409          */
 410         public function getContextTitle() {
 411                 if ( is_null( $this->mContextTitle ) ) {
 412                         global $wgTitle;
 413                         return $wgTitle;
 414                 } else {
 415                         return $this->mContextTitle;
 416                 }
 417         }
 418
 419         /**
 420          * Returns if the given content model is editable.
 421          *
 422          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 423          * @return bool
 424          * @throws MWException if $modelId has no known handler
 425          */
 426         public function isSupportedContentModel( $modelId ) {
 427                 return $this->allowNonTextContent ||
 428                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 429         }
 430
 431         function submit() {
 432                 $this->edit();
 433         }
 434
 435         /**
 436          * This is the function that gets called for "action=edit". It
 437          * sets up various member variables, then passes execution to
 438          * another function, usually showEditForm()
 439          *
 440          * The edit form is self-submitting, so that when things like
 441          * preview and edit conflicts occur, we get the same form back
 442          * with the extra stuff added.  Only when the final submission
 443          * is made and all is well do we actually save and redirect to
 444          * the newly-edited page.
 445          */
 446         function edit() {
 447                 global $wgOut, $wgRequest, $wgUser;
 448                 // Allow extensions to modify/prevent this form or submission
 449                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 450                         return;
 451                 }
 452
 453                 wfProfileIn( __METHOD__ );
 454                 wfDebug( __METHOD__ . ": enter\n" );
 455
 456                 // If they used redlink=1 and the page exists, redirect to the main article
 457                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 458                         $wgOut->redirect( $this->mTitle->getFullURL() );
 459                         wfProfileOut( __METHOD__ );
 460                         return;
 461                 }
 462
 463                 $this->importFormData( $wgRequest );
 464                 $this->firsttime = false;
 465
 466                 if ( $this->live ) {
 467                         $this->livePreview();
 468                         wfProfileOut( __METHOD__ );
 469                         return;
 470                 }
 471
 472                 if ( wfReadOnly() && $this->save ) {
 473                         // Force preview
 474                         $this->save = false;
 475                         $this->preview = true;
 476                 }
 477
 478                 if ( $this->save ) {
 479                         $this->formtype = 'save';
 480                 } elseif ( $this->preview ) {
 481                         $this->formtype = 'preview';
 482                 } elseif ( $this->diff ) {
 483                         $this->formtype = 'diff';
 484                 } else { # First time through
 485                         $this->firsttime = true;
 486                         if ( $this->previewOnOpen() ) {
 487                                 $this->formtype = 'preview';
 488                         } else {
 489                                 $this->formtype = 'initial';
 490                         }
 491                 }
 492
 493                 $permErrors = $this->getEditPermissionErrors();
 494                 if ( $permErrors ) {
 495                         wfDebug( __METHOD__ . ": User can't edit\n" );
 496                         // Auto-block user's IP if the account was "hard" blocked
 497                         $wgUser->spreadAnyEditBlock();
 498
 499                         $this->displayPermissionsError( $permErrors );
 500
 501                         wfProfileOut( __METHOD__ );
 502                         return;
 503                 }
 504
 505                 wfProfileIn( __METHOD__ . "-business-end" );
 506
 507                 $this->isConflict = false;
 508                 // css / js subpages of user pages get a special treatment
 509                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 510                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 511                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 512                 // @todo FIXME: Silly assignment.
 513                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 514
 515                 # Show applicable editing introductions
 516                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 517                         $this->showIntro();
 518                 }
 519
 520                 # Attempt submission here.  This will check for edit conflicts,
 521                 # and redundantly check for locked database, blocked IPs, etc.
 522                 # that edit() already checked just in case someone tries to sneak
 523                 # in the back door with a hand-edited submission URL.
 524
 525                 if ( 'save' == $this->formtype ) {
 526                         if ( !$this->attemptSave() ) {
 527                                 wfProfileOut( __METHOD__ . "-business-end" );
 528                                 wfProfileOut( __METHOD__ );
 529                                 return;
 530                         }
 531                 }
 532
 533                 # First time through: get contents, set time for conflict
 534                 # checking, etc.
 535                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 536                         if ( $this->initialiseForm() === false ) {
 537                                 $this->noSuchSectionPage();
 538                                 wfProfileOut( __METHOD__ . "-business-end" );
 539                                 wfProfileOut( __METHOD__ );
 540                                 return;
 541                         }
 542
 543                         if ( !$this->mTitle->getArticleID() ) {
 544                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 545                         } else {
 546                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 547                         }
 548
 549                 }
 550
 551                 $this->showEditForm();
 552                 wfProfileOut( __METHOD__ . "-business-end" );
 553                 wfProfileOut( __METHOD__ );
 554         }
 555
 556         /**
 557          * @return array
 558          */
 559         protected function getEditPermissionErrors() {
 560                 global $wgUser;
 561                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 562                 # Can this title be created?
 563                 if ( !$this->mTitle->exists() ) {
 564                         $permErrors = array_merge( $permErrors,
 565                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 566                 }
 567                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 568                 $remove = array();
 569                 foreach ( $permErrors as $error ) {
 570                         if ( ( $this->preview || $this->diff )
 571                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 572                         ) {
 573                                 $remove[] = $error;
 574                         }
 575                 }
 576                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 577                 return $permErrors;
 578         }
 579
 580         /**
 581          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 582          * but with the following differences:
 583          * - If redlink=1, the user will be redirected to the page
 584          * - If there is content to display or the error occurs while either saving,
 585          *   previewing or showing the difference, it will be a
 586          *   "View source for ..." page displaying the source code after the error message.
 587          *
 588          * @since 1.19
 589          * @param array $permErrors Array of permissions errors, as returned by
 590          *    Title::getUserPermissionsErrors().
 591          * @throws PermissionsError
 592          */
 593         protected function displayPermissionsError( array $permErrors ) {
 594                 global $wgRequest, $wgOut;
 595
 596                 if ( $wgRequest->getBool( 'redlink' ) ) {
 597                         // The edit page was reached via a red link.
 598                         // Redirect to the article page and let them click the edit tab if
 599                         // they really want a permission error.
 600                         $wgOut->redirect( $this->mTitle->getFullURL() );
 601                         return;
 602                 }
 603
 604                 $content = $this->getContentObject();
 605
 606                 # Use the normal message if there's nothing to display
 607                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 608                         $action = $this->mTitle->exists() ? 'edit' :
 609                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 610                         throw new PermissionsError( $action, $permErrors );
 611                 }
 612
 613                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 614
 615                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 616                 $wgOut->setPageTitle( wfMessage(
 617                         'viewsource-title',
 618                         $this->getContextTitle()->getPrefixedText()
 619                 ) );
 620                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 621                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 622                 $wgOut->addHTML( "<hr />\n" );
 623
 624                 # If the user made changes, preserve them when showing the markup
 625                 # (This happens when a user is blocked during edit, for instance)
 626                 if ( !$this->firsttime ) {
 627                         $text = $this->textbox1;
 628                         $wgOut->addWikiMsg( 'viewyourtext' );
 629                 } else {
 630                         $text = $this->toEditText( $content );
 631                         $wgOut->addWikiMsg( 'viewsourcetext' );
 632                 }
 633
 634                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 635
 636                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 637                         Linker::formatTemplates( $this->getTemplates() ) ) );
 638
 639                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 640
 641                 if ( $this->mTitle->exists() ) {
 642                         $wgOut->returnToMain( null, $this->mTitle );
 643                 }
 644         }
 645
 646         /**
 647          * Show a read-only error
 648          * Parameters are the same as OutputPage:readOnlyPage()
 649          * Redirect to the article page if redlink=1
 650          * @deprecated since 1.19; use displayPermissionsError() instead
 651          */
 652         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 653                 wfDeprecated( __METHOD__, '1.19' );
 654
 655                 global $wgRequest, $wgOut;
 656                 if ( $wgRequest->getBool( 'redlink' ) ) {
 657                         // The edit page was reached via a red link.
 658                         // Redirect to the article page and let them click the edit tab if
 659                         // they really want a permission error.
 660                         $wgOut->redirect( $this->mTitle->getFullURL() );
 661                 } else {
 662                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 663                 }
 664         }
 665
 666         /**
 667          * Should we show a preview when the edit form is first shown?
 668          *
 669          * @return bool
 670          */
 671         protected function previewOnOpen() {
 672                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 673                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 674                         // Explicit override from request
 675                         return true;
 676                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 677                         // Explicit override from request
 678                         return false;
 679                 } elseif ( $this->section == 'new' ) {
 680                         // Nothing *to* preview for new sections
 681                         return false;
 682                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 683                         && $wgUser->getOption( 'previewonfirst' )
 684                 ) {
 685                         // Standard preference behavior
 686                         return true;
 687                 } elseif ( !$this->mTitle->exists()
 688                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 689                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 690                 ) {
 691                         // Categories are special
 692                         return true;
 693                 } else {
 694                         return false;
 695                 }
 696         }
 697
 698         /**
 699          * Checks whether the user entered a skin name in uppercase,
 700          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 701          *
 702          * @return bool
 703          */
 704         protected function isWrongCaseCssJsPage() {
 705                 if ( $this->mTitle->isCssJsSubpage() ) {
 706                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 707                         $skins = array_merge(
 708                                 array_keys( Skin::getSkinNames() ),
 709                                 array( 'common' )
 710                         );
 711                         return !in_array( $name, $skins )
 712                                 && in_array( strtolower( $name ), $skins );
 713                 } else {
 714                         return false;
 715                 }
 716         }
 717
 718         /**
 719          * Returns whether section editing is supported for the current page.
 720          * Subclasses may override this to replace the default behavior, which is
 721          * to check ContentHandler::supportsSections.
 722          *
 723          * @return bool true if this edit page supports sections, false otherwise.
 724          */
 725         protected function isSectionEditSupported() {
 726                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 727                 return $contentHandler->supportsSections();
 728         }
 729
 730         /**
 731          * This function collects the form data and uses it to populate various member variables.
 732          * @param WebRequest $request
 733          * @throws ErrorPageError
 734          */
 735         function importFormData( &$request ) {
 736                 global $wgContLang, $wgUser;
 737
 738                 wfProfileIn( __METHOD__ );
 739
 740                 # Section edit can come from either the form or a link
 741                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 742
 743                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 744                         wfProfileOut( __METHOD__ );
 745                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 746                 }
 747
 748                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 749
 750                 if ( $request->wasPosted() ) {
 751                         # These fields need to be checked for encoding.
 752                         # Also remove trailing whitespace, but don't remove _initial_
 753                         # whitespace from the text boxes. This may be significant formatting.
 754                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 755                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 756                                 // Skip this if wpTextbox2 has input, it indicates that we came
 757                                 // from a conflict page with raw page text, not a custom form
 758                                 // modified by subclasses
 759                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 760                                 $textbox1 = $this->importContentFormData( $request );
 761                                 if ( $textbox1 !== null ) {
 762                                         $this->textbox1 = $textbox1;
 763                                 }
 764
 765                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 766                         }
 767
 768                         # Truncate for whole multibyte characters
 769                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 770
 771                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 772                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 773                         # section titles.
 774                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 775
 776                         # Treat sectiontitle the same way as summary.
 777                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 778                         # currently doing double duty as both edit summary and section title. Right now this
 779                         # is just to allow API edits to work around this limitation, but this should be
 780                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 781                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 782                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 783
 784                         $this->edittime = $request->getVal( 'wpEdittime' );
 785                         $this->starttime = $request->getVal( 'wpStarttime' );
 786
 787                         $undidRev = $request->getInt( 'wpUndidRevision' );
 788                         if ( $undidRev ) {
 789                                 $this->undidRev = $undidRev;
 790                         }
 791
 792                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 793
 794                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 795                                 // wpTextbox1 field is missing, possibly due to being "too big"
 796                                 // according to some filter rules such as Suhosin's setting for
 797                                 // suhosin.request.max_value_length (d'oh)
 798                                 $this->incompleteForm = true;
 799                         } else {
 800                                 // edittime should be one of our last fields; if it's missing,
 801                                 // the submission probably broke somewhere in the middle.
 802                                 $this->incompleteForm = is_null( $this->edittime );
 803                         }
 804                         if ( $this->incompleteForm ) {
 805                                 # If the form is incomplete, force to preview.
 806                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 807                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 808                                 $this->preview = true;
 809                         } else {
 810                                 /* Fallback for live preview */
 811                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 812                                 $this->diff = $request->getCheck( 'wpDiff' );
 813
 814                                 // Remember whether a save was requested, so we can indicate
 815                                 // if we forced preview due to session failure.
 816                                 $this->mTriedSave = !$this->preview;
 817
 818                                 if ( $this->tokenOk( $request ) ) {
 819                                         # Some browsers will not report any submit button
 820                                         # if the user hits enter in the comment box.
 821                                         # The unmarked state will be assumed to be a save,
 822                                         # if the form seems otherwise complete.
 823                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 824                                 } elseif ( $this->diff ) {
 825                                         # Failed token check, but only requested "Show Changes".
 826                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 827                                 } else {
 828                                         # Page might be a hack attempt posted from
 829                                         # an external site. Preview instead of saving.
 830                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 831                                         $this->preview = true;
 832                                 }
 833                         }
 834                         $this->save = !$this->preview && !$this->diff;
 835                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 836                                 $this->edittime = null;
 837                         }
 838
 839                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 840                                 $this->starttime = null;
 841                         }
 842
 843                         $this->recreate = $request->getCheck( 'wpRecreate' );
 844
 845                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 846                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 847
 848                         # Don't force edit summaries when a user is editing their own user or talk page
 849                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 850                                 && $this->mTitle->getText() == $wgUser->getName()
 851                         ) {
 852                                 $this->allowBlankSummary = true;
 853                         } else {
 854                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 855                                         || !$wgUser->getOption( 'forceeditsummary' );
 856                         }
 857
 858                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 859                 } else {
 860                         # Not a posted form? Start with nothing.
 861                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 862                         $this->textbox1 = '';
 863                         $this->summary = '';
 864                         $this->sectiontitle = '';
 865                         $this->edittime = '';
 866                         $this->starttime = wfTimestampNow();
 867                         $this->edit = false;
 868                         $this->preview = false;
 869                         $this->save = false;
 870                         $this->diff = false;
 871                         $this->minoredit = false;
 872                         // Watch may be overridden by request parameters
 873                         $this->watchthis = $request->getBool( 'watchthis', false );
 874                         $this->recreate = false;
 875
 876                         // When creating a new section, we can preload a section title by passing it as the
 877                         // preloadtitle parameter in the URL (Bug 13100)
 878                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 879                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 880                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 881                                 $this->summary = $request->getVal( 'preloadtitle' );
 882                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 883                                 $this->summary = $request->getText( 'summary' );
 884                                 if ( $this->summary !== '' ) {
 885                                         $this->hasPresetSummary = true;
 886                                 }
 887                         }
 888
 889                         if ( $request->getVal( 'minor' ) ) {
 890                                 $this->minoredit = true;
 891                         }
 892                 }
 893
 894                 $this->oldid = $request->getInt( 'oldid' );
 895
 896                 $this->bot = $request->getBool( 'bot', true );
 897                 $this->nosummary = $request->getBool( 'nosummary' );
 898
 899                 // May be overridden by revision.
 900                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 901                 // May be overridden by revision.
 902                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 903
 904                 if ( !ContentHandler::getForModelID( $this->contentModel )
 905                         ->isSupportedFormat( $this->contentFormat )
 906                 ) {
 907                         throw new ErrorPageError(
 908                                 'editpage-notsupportedcontentformat-title',
 909                                 'editpage-notsupportedcontentformat-text',
 910                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 911                         );
 912                 }
 913
 914                 /**
 915                  * @todo Check if the desired model is allowed in this namespace, and if
 916                  *   a transition from the page's current model to the new model is
 917                  *   allowed.
 918                  */
 919
 920                 $this->live = $request->getCheck( 'live' );
 921                 $this->editintro = $request->getText( 'editintro',
 922                         // Custom edit intro for new sections
 923                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 924
 925                 // Allow extensions to modify form data
 926                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 927
 928                 wfProfileOut( __METHOD__ );
 929         }
 930
 931         /**
 932          * Subpage overridable method for extracting the page content data from the
 933          * posted form to be placed in $this->textbox1, if using customized input
 934          * this method should be overridden and return the page text that will be used
 935          * for saving, preview parsing and so on...
 936          *
 937          * @param WebRequest $request
 938          */
 939         protected function importContentFormData( &$request ) {
 940                 return; // Don't do anything, EditPage already extracted wpTextbox1
 941         }
 942
 943         /**
 944          * Initialise form fields in the object
 945          * Called on the first invocation, e.g. when a user clicks an edit link
 946          * @return bool If the requested section is valid
 947          */
 948         function initialiseForm() {
 949                 global $wgUser;
 950                 $this->edittime = $this->mArticle->getTimestamp();
 951
 952                 $content = $this->getContentObject( false ); #TODO: track content object?!
 953                 if ( $content === false ) {
 954                         return false;
 955                 }
 956                 $this->textbox1 = $this->toEditText( $content );
 957
 958                 // activate checkboxes if user wants them to be always active
 959                 # Sort out the "watch" checkbox
 960                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 961                         # Watch all edits
 962                         $this->watchthis = true;
 963                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 964                         # Watch creations
 965                         $this->watchthis = true;
 966                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 967                         # Already watched
 968                         $this->watchthis = true;
 969                 }
 970                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 971                         $this->minoredit = true;
 972                 }
 973                 if ( $this->textbox1 === false ) {
 974                         return false;
 975                 }
 976                 return true;
 977         }
 978
 979         /**
 980          * Fetch initial editing page content.
 981          *
 982          * @param string|bool $def_text
 983          * @return string|bool string on success, $def_text for invalid sections
 984          * @private
 985          * @deprecated since 1.21, get WikiPage::getContent() instead.
 986          */
 987         function getContent( $def_text = false ) {
 988                 ContentHandler::deprecated( __METHOD__, '1.21' );
 989
 990                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 991                         $def_content = $this->toEditContent( $def_text );
 992                 } else {
 993                         $def_content = false;
 994                 }
 995
 996                 $content = $this->getContentObject( $def_content );
 997
 998                 // Note: EditPage should only be used with text based content anyway.
 999                 return $this->toEditText( $content );
1000         }
1001
1002         /**
1003          * @param Content|null $def_content The default value to return
1004          *
1005          * @return Content|null Content on success, $def_content for invalid sections
1006          *
1007          * @since 1.21
1008          */
1009         protected function getContentObject( $def_content = null ) {
1010                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1011
1012                 wfProfileIn( __METHOD__ );
1013
1014                 $content = false;
1015
1016                 // For message page not locally set, use the i18n message.
1017                 // For other non-existent articles, use preload text if any.
1018                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1019                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1020                                 # If this is a system message, get the default text.
1021                                 $msg = $this->mTitle->getDefaultMessageText();
1022
1023                                 $content = $this->toEditContent( $msg );
1024                         }
1025                         if ( $content === false ) {
1026                                 # If requested, preload some text.
1027                                 $preload = $wgRequest->getVal( 'preload',
1028                                         // Custom preload text for new sections
1029                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1030                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1031
1032                                 $content = $this->getPreloadedContent( $preload, $params );
1033                         }
1034                 // For existing pages, get text based on "undo" or section parameters.
1035                 } else {
1036                         if ( $this->section != '' ) {
1037                                 // Get section edit text (returns $def_text for invalid sections)
1038                                 $orig = $this->getOriginalContent( $wgUser );
1039                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1040
1041                                 if ( !$content ) {
1042                                         $content = $def_content;
1043                                 }
1044                         } else {
1045                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1046                                 $undo = $wgRequest->getInt( 'undo' );
1047
1048                                 if ( $undo > 0 && $undoafter > 0 ) {
1049
1050                                         $undorev = Revision::newFromId( $undo );
1051                                         $oldrev = Revision::newFromId( $undoafter );
1052
1053                                         # Sanity check, make sure it's the right page,
1054                                         # the revisions exist and they were not deleted.
1055                                         # Otherwise, $content will be left as-is.
1056                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1057                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1058                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1059
1060                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1061
1062                                                 if ( $content === false ) {
1063                                                         # Warn the user that something went wrong
1064                                                         $undoMsg = 'failure';
1065                                                 } else {
1066                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1067                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1068                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1069
1070                                                         if ( $newContent->equals( $oldContent ) ) {
1071                                                                 # Tell the user that the undo results in no change,
1072                                                                 # i.e. the revisions were already undone.
1073                                                                 $undoMsg = 'nochange';
1074                                                                 $content = false;
1075                                                         } else {
1076                                                                 # Inform the user of our success and set an automatic edit summary
1077                                                                 $undoMsg = 'success';
1078
1079                                                                 # If we just undid one rev, use an autosummary
1080                                                                 $firstrev = $oldrev->getNext();
1081                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1082                                                                         $userText = $undorev->getUserText();
1083                                                                         if ( $userText === '' ) {
1084                                                                                 $undoSummary = wfMessage(
1085                                                                                         'undo-summary-username-hidden',
1086                                                                                         $undo
1087                                                                                 )->inContentLanguage()->text();
1088                                                                         } else {
1089                                                                                 $undoSummary = wfMessage(
1090                                                                                         'undo-summary',
1091                                                                                         $undo,
1092                                                                                         $userText
1093                                                                                 )->inContentLanguage()->text();
1094                                                                         }
1095                                                                         if ( $this->summary === '' ) {
1096                                                                                 $this->summary = $undoSummary;
1097                                                                         } else {
1098                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1099                                                                                         ->inContentLanguage()->text() . $this->summary;
1100                                                                         }
1101                                                                         $this->undidRev = $undo;
1102                                                                 }
1103                                                                 $this->formtype = 'diff';
1104                                                         }
1105                                                 }
1106                                         } else {
1107                                                 // Failed basic sanity checks.
1108                                                 // Older revisions may have been removed since the link
1109                                                 // was created, or we may simply have got bogus input.
1110                                                 $undoMsg = 'norev';
1111                                         }
1112
1113                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1114                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1115                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1116                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1117                                 }
1118
1119                                 if ( $content === false ) {
1120                                         $content = $this->getOriginalContent( $wgUser );
1121                                 }
1122                         }
1123                 }
1124
1125                 wfProfileOut( __METHOD__ );
1126                 return $content;
1127         }
1128
1129         /**
1130          * Get the content of the wanted revision, without section extraction.
1131          *
1132          * The result of this function can be used to compare user's input with
1133          * section replaced in its context (using WikiPage::replaceSection())
1134          * to the original text of the edit.
1135          *
1136          * This differs from Article::getContent() that when a missing revision is
1137          * encountered the result will be null and not the
1138          * 'missing-revision' message.
1139          *
1140          * @since 1.19
1141          * @param User $user The user to get the revision for
1142          * @return Content|null
1143          */
1144         private function getOriginalContent( User $user ) {
1145                 if ( $this->section == 'new' ) {
1146                         return $this->getCurrentContent();
1147                 }
1148                 $revision = $this->mArticle->getRevisionFetched();
1149                 if ( $revision === null ) {
1150                         if ( !$this->contentModel ) {
1151                                 $this->contentModel = $this->getTitle()->getContentModel();
1152                         }
1153                         $handler = ContentHandler::getForModelID( $this->contentModel );
1154
1155                         return $handler->makeEmptyContent();
1156                 }
1157                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1158                 return $content;
1159         }
1160
1161         /**
1162          * Get the current content of the page. This is basically similar to
1163          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1164          * content object is returned instead of null.
1165          *
1166          * @since 1.21
1167          * @return Content
1168          */
1169         protected function getCurrentContent() {
1170                 $rev = $this->mArticle->getRevision();
1171                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1172
1173                 if ( $content === false || $content === null ) {
1174                         if ( !$this->contentModel ) {
1175                                 $this->contentModel = $this->getTitle()->getContentModel();
1176                         }
1177                         $handler = ContentHandler::getForModelID( $this->contentModel );
1178
1179                         return $handler->makeEmptyContent();
1180                 } else {
1181                         # nasty side-effect, but needed for consistency
1182                         $this->contentModel = $rev->getContentModel();
1183                         $this->contentFormat = $rev->getContentFormat();
1184
1185                         return $content;
1186                 }
1187         }
1188
1189         /**
1190          * Use this method before edit() to preload some text into the edit box
1191          *
1192          * @param string $text
1193          * @deprecated since 1.21, use setPreloadedContent() instead.
1194          */
1195         public function setPreloadedText( $text ) {
1196                 ContentHandler::deprecated( __METHOD__, "1.21" );
1197
1198                 $content = $this->toEditContent( $text );
1199
1200                 $this->setPreloadedContent( $content );
1201         }
1202
1203         /**
1204          * Use this method before edit() to preload some content into the edit box
1205          *
1206          * @param Content $content
1207          *
1208          * @since 1.21
1209          */
1210         public function setPreloadedContent( Content $content ) {
1211                 $this->mPreloadContent = $content;
1212         }
1213
1214         /**
1215          * Get the contents to be preloaded into the box, either set by
1216          * an earlier setPreloadText() or by loading the given page.
1217          *
1218          * @param string $preload representing the title to preload from.
1219          *
1220          * @return string
1221          *
1222          * @deprecated since 1.21, use getPreloadedContent() instead
1223          */
1224         protected function getPreloadedText( $preload ) {
1225                 ContentHandler::deprecated( __METHOD__, "1.21" );
1226
1227                 $content = $this->getPreloadedContent( $preload );
1228                 $text = $this->toEditText( $content );
1229
1230                 return $text;
1231         }
1232
1233         /**
1234          * Get the contents to be preloaded into the box, either set by
1235          * an earlier setPreloadText() or by loading the given page.
1236          *
1237          * @param string $preload Representing the title to preload from.
1238          * @param array $params Parameters to use (interface-message style) in the preloaded text
1239          *
1240          * @return Content
1241          *
1242          * @since 1.21
1243          */
1244         protected function getPreloadedContent( $preload, $params = array() ) {
1245                 global $wgUser;
1246
1247                 if ( !empty( $this->mPreloadContent ) ) {
1248                         return $this->mPreloadContent;
1249                 }
1250
1251                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1252
1253                 if ( $preload === '' ) {
1254                         return $handler->makeEmptyContent();
1255                 }
1256
1257                 $title = Title::newFromText( $preload );
1258                 # Check for existence to avoid getting MediaWiki:Noarticletext
1259                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1260                         //TODO: somehow show a warning to the user!
1261                         return $handler->makeEmptyContent();
1262                 }
1263
1264                 $page = WikiPage::factory( $title );
1265                 if ( $page->isRedirect() ) {
1266                         $title = $page->getRedirectTarget();
1267                         # Same as before
1268                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1269                                 //TODO: somehow show a warning to the user!
1270                                 return $handler->makeEmptyContent();
1271                         }
1272                         $page = WikiPage::factory( $title );
1273                 }
1274
1275                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1276                 $content = $page->getContent( Revision::RAW );
1277
1278                 if ( !$content ) {
1279                         //TODO: somehow show a warning to the user!
1280                         return $handler->makeEmptyContent();
1281                 }
1282
1283                 if ( $content->getModel() !== $handler->getModelID() ) {
1284                         $converted = $content->convert( $handler->getModelID() );
1285
1286                         if ( !$converted ) {
1287                                 //TODO: somehow show a warning to the user!
1288                                 wfDebug( "Attempt to preload incompatible content: "
1289                                                 . "can't convert " . $content->getModel()
1290                                                 . " to " . $handler->getModelID() );
1291
1292                                 return $handler->makeEmptyContent();
1293                         }
1294
1295                         $content = $converted;
1296                 }
1297
1298                 return $content->preloadTransform( $title, $parserOptions, $params );
1299         }
1300
1301         /**
1302          * Make sure the form isn't faking a user's credentials.
1303          *
1304          * @param WebRequest $request
1305          * @return bool
1306          * @private
1307          */
1308         function tokenOk( &$request ) {
1309                 global $wgUser;
1310                 $token = $request->getVal( 'wpEditToken' );
1311                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1312                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1313                 return $this->mTokenOk;
1314         }
1315
1316         /**
1317          * Sets post-edit cookie indicating the user just saved a particular revision.
1318          *
1319          * This uses a temporary cookie for each revision ID so separate saves will never
1320          * interfere with each other.
1321          *
1322          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1323          * the redirect.  It must be clearable by JavaScript code, so it must not be
1324          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1325          * variable.
1326          *
1327          * If the variable were set on the server, it would be cached, which is unwanted
1328          * since the post-edit state should only apply to the load right after the save.
1329          *
1330          * @param $statusValue int The status value (to check for new article status)
1331          */
1332         protected function setPostEditCookie( $statusValue ) {
1333                 $revisionId = $this->mArticle->getLatest();
1334                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1335
1336                 $val = 'saved';
1337                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1338                         $val = 'created';
1339                 } elseif ( $this->oldid ) {
1340                         $val = 'restored';
1341                 }
1342
1343                 $response = RequestContext::getMain()->getRequest()->response();
1344                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1345                         'httpOnly' => false,
1346                 ) );
1347         }
1348
1349         /**
1350          * Attempt submission
1351          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1352          * @return bool false if output is done, true if the rest of the form should be displayed
1353          */
1354         public function attemptSave() {
1355                 global $wgUser;
1356
1357                 $resultDetails = false;
1358                 # Allow bots to exempt some edits from bot flagging
1359                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1360                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1361
1362                 return $this->handleStatus( $status, $resultDetails );
1363         }
1364
1365         /**
1366          * Handle status, such as after attempt save
1367          *
1368          * @param Status $status
1369          * @param array|bool $resultDetails
1370          *
1371          * @throws ErrorPageError
1372          * @return bool false, if output is done, true if rest of the form should be displayed
1373          */
1374         private function handleStatus( Status $status, $resultDetails ) {
1375                 global $wgUser, $wgOut;
1376
1377                 /**
1378                  * @todo FIXME: once the interface for internalAttemptSave() is made
1379                  *   nicer, this should use the message in $status
1380                  */
1381                 if ( $status->value == self::AS_SUCCESS_UPDATE
1382                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1383                 ) {
1384                         $this->didSave = true;
1385                         if ( !$resultDetails['nullEdit'] ) {
1386                                 $this->setPostEditCookie( $status->value );
1387                         }
1388                 }
1389
1390                 switch ( $status->value ) {
1391                         case self::AS_HOOK_ERROR_EXPECTED:
1392                         case self::AS_CONTENT_TOO_BIG:
1393                         case self::AS_ARTICLE_WAS_DELETED:
1394                         case self::AS_CONFLICT_DETECTED:
1395                         case self::AS_SUMMARY_NEEDED:
1396                         case self::AS_TEXTBOX_EMPTY:
1397                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1398                         case self::AS_END:
1399                                 return true;
1400
1401                         case self::AS_HOOK_ERROR:
1402                                 return false;
1403
1404                         case self::AS_PARSE_ERROR:
1405                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1406                                 return true;
1407
1408                         case self::AS_SUCCESS_NEW_ARTICLE:
1409                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1410                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1411                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1412                                 return false;
1413
1414                         case self::AS_SUCCESS_UPDATE:
1415                                 $extraQuery = '';
1416                                 $sectionanchor = $resultDetails['sectionanchor'];
1417
1418                                 // Give extensions a chance to modify URL query on update
1419                                 wfRunHooks(
1420                                         'ArticleUpdateBeforeRedirect',
1421                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1422                                 );
1423
1424                                 if ( $resultDetails['redirect'] ) {
1425                                         if ( $extraQuery == '' ) {
1426                                                 $extraQuery = 'redirect=no';
1427                                         } else {
1428                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1429                                         }
1430                                 }
1431                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1432                                 return false;
1433
1434                         case self::AS_BLANK_ARTICLE:
1435                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1436                                 return false;
1437
1438                         case self::AS_SPAM_ERROR:
1439                                 $this->spamPageWithContent( $resultDetails['spam'] );
1440                                 return false;
1441
1442                         case self::AS_BLOCKED_PAGE_FOR_USER:
1443                                 throw new UserBlockedError( $wgUser->getBlock() );
1444
1445                         case self::AS_IMAGE_REDIRECT_ANON:
1446                         case self::AS_IMAGE_REDIRECT_LOGGED:
1447                                 throw new PermissionsError( 'upload' );
1448
1449                         case self::AS_READ_ONLY_PAGE_ANON:
1450                         case self::AS_READ_ONLY_PAGE_LOGGED:
1451                                 throw new PermissionsError( 'edit' );
1452
1453                         case self::AS_READ_ONLY_PAGE:
1454                                 throw new ReadOnlyError;
1455
1456                         case self::AS_RATE_LIMITED:
1457                                 throw new ThrottledError();
1458
1459                         case self::AS_NO_CREATE_PERMISSION:
1460                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1461                                 throw new PermissionsError( $permission );
1462
1463                         default:
1464                                 // We don't recognize $status->value. The only way that can happen
1465                                 // is if an extension hook aborted from inside ArticleSave.
1466                                 // Render the status object into $this->hookError
1467                                 // FIXME this sucks, we should just use the Status object throughout
1468                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1469                                         '</div>';
1470                                 return true;
1471                 }
1472         }
1473
1474         /**
1475          * Run hooks that can filter edits just before they get saved.
1476          *
1477          * @param Content $content The Content to filter.
1478          * @param Status $status For reporting the outcome to the caller
1479          * @param User $user The user performing the edit
1480          *
1481          * @return bool
1482          */
1483         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1484                 // Run old style post-section-merge edit filter
1485                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1486                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1487
1488                         # Error messages etc. could be handled within the hook...
1489                         $status->fatal( 'hookaborted' );
1490                         $status->value = self::AS_HOOK_ERROR;
1491                         return false;
1492                 } elseif ( $this->hookError != '' ) {
1493                         # ...or the hook could be expecting us to produce an error
1494                         $status->fatal( 'hookaborted' );
1495                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1496                         return false;
1497                 }
1498
1499                 // Run new style post-section-merge edit filter
1500                 if ( !wfRunHooks( 'EditFilterMergedContent',
1501                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1502                                 $user, $this->minoredit ) ) ) {
1503
1504                         # Error messages etc. could be handled within the hook...
1505                         // XXX: $status->value may already be something informative...
1506                         $this->hookError = $status->getWikiText();
1507                         $status->fatal( 'hookaborted' );
1508                         $status->value = self::AS_HOOK_ERROR;
1509                         return false;
1510                 } elseif ( !$status->isOK() ) {
1511                         # ...or the hook could be expecting us to produce an error
1512                         // FIXME this sucks, we should just use the Status object throughout
1513                         $this->hookError = $status->getWikiText();
1514                         $status->fatal( 'hookaborted' );
1515                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1516                         return false;
1517                 }
1518
1519                 return true;
1520         }
1521
1522         /**
1523          * Attempt submission (no UI)
1524          *
1525          * @param array $result Array to add statuses to, currently with the
1526          *   possible keys:
1527          *   - spam (string): Spam string from content if any spam is detected by
1528          *     matchSpamRegex.
1529          *   - sectionanchor (string): Section anchor for a section save.
1530          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1531          *     false otherwise.
1532          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1533          *     revision is a redirect.
1534          * @param bool $bot True if edit is being made under the bot right.
1535          *
1536          * @return Status Status object, possibly with a message, but always with
1537          *   one of the AS_* constants in $status->value,
1538          *
1539          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1540          *   various error display idiosyncrasies. There are also lots of cases
1541          *   where error metadata is set in the object and retrieved later instead
1542          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1543          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1544          * time.
1545          */
1546         function internalAttemptSave( &$result, $bot = false ) {
1547                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1548
1549                 $status = Status::newGood();
1550
1551                 wfProfileIn( __METHOD__ );
1552                 wfProfileIn( __METHOD__ . '-checks' );
1553
1554                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1555                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1556                         $status->fatal( 'hookaborted' );
1557                         $status->value = self::AS_HOOK_ERROR;
1558                         wfProfileOut( __METHOD__ . '-checks' );
1559                         wfProfileOut( __METHOD__ );
1560                         return $status;
1561                 }
1562
1563                 $spam = $wgRequest->getText( 'wpAntispam' );
1564                 if ( $spam !== '' ) {
1565                         wfDebugLog(
1566                                 'SimpleAntiSpam',
1567                                 $wgUser->getName() .
1568                                 ' editing "' .
1569                                 $this->mTitle->getPrefixedText() .
1570                                 '" submitted bogus field "' .
1571                                 $spam .
1572                                 '"'
1573                         );
1574                         $status->fatal( 'spamprotectionmatch', false );
1575                         $status->value = self::AS_SPAM_ERROR;
1576                         wfProfileOut( __METHOD__ . '-checks' );
1577                         wfProfileOut( __METHOD__ );
1578                         return $status;
1579                 }
1580
1581                 try {
1582                         # Construct Content object
1583                         $textbox_content = $this->toEditContent( $this->textbox1 );
1584                 } catch ( MWContentSerializationException $ex ) {
1585                         $status->fatal(
1586                                 'content-failed-to-parse',
1587                                 $this->contentModel,
1588                                 $this->contentFormat,
1589                                 $ex->getMessage()
1590                         );
1591                         $status->value = self::AS_PARSE_ERROR;
1592                         wfProfileOut( __METHOD__ . '-checks' );
1593                         wfProfileOut( __METHOD__ );
1594                         return $status;
1595                 }
1596
1597                 # Check image redirect
1598                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1599                         $textbox_content->isRedirect() &&
1600                         !$wgUser->isAllowed( 'upload' ) ) {
1601                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1602                                 $status->setResult( false, $code );
1603
1604                                 wfProfileOut( __METHOD__ . '-checks' );
1605                                 wfProfileOut( __METHOD__ );
1606
1607                                 return $status;
1608                 }
1609
1610                 # Check for spam
1611                 $match = self::matchSummarySpamRegex( $this->summary );
1612                 if ( $match === false && $this->section == 'new' ) {
1613                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1614                         # regular summaries, it is added to the actual wikitext.
1615                         if ( $this->sectiontitle !== '' ) {
1616                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1617                                 $match = self::matchSpamRegex( $this->sectiontitle );
1618                         } else {
1619                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1620                                 # is used with the 'summary' parameter.
1621                                 $match = self::matchSpamRegex( $this->summary );
1622                         }
1623                 }
1624                 if ( $match === false ) {
1625                         $match = self::matchSpamRegex( $this->textbox1 );
1626                 }
1627                 if ( $match !== false ) {
1628                         $result['spam'] = $match;
1629                         $ip = $wgRequest->getIP();
1630                         $pdbk = $this->mTitle->getPrefixedDBkey();
1631                         $match = str_replace( "\n", '', $match );
1632                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1633                         $status->fatal( 'spamprotectionmatch', $match );
1634                         $status->value = self::AS_SPAM_ERROR;
1635                         wfProfileOut( __METHOD__ . '-checks' );
1636                         wfProfileOut( __METHOD__ );
1637                         return $status;
1638                 }
1639                 if ( !wfRunHooks(
1640                         'EditFilter',
1641                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1642                 ) {
1643                         # Error messages etc. could be handled within the hook...
1644                         $status->fatal( 'hookaborted' );
1645                         $status->value = self::AS_HOOK_ERROR;
1646                         wfProfileOut( __METHOD__ . '-checks' );
1647                         wfProfileOut( __METHOD__ );
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                         wfProfileOut( __METHOD__ . '-checks' );
1654                         wfProfileOut( __METHOD__ );
1655                         return $status;
1656                 }
1657
1658                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1659                         // Auto-block user's IP if the account was "hard" blocked
1660                         $wgUser->spreadAnyEditBlock();
1661                         # Check block state against master, thus 'false'.
1662                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1663                         wfProfileOut( __METHOD__ . '-checks' );
1664                         wfProfileOut( __METHOD__ );
1665                         return $status;
1666                 }
1667
1668                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1669                 if ( $this->kblength > $wgMaxArticleSize ) {
1670                         // Error will be displayed by showEditForm()
1671                         $this->tooBig = true;
1672                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1673                         wfProfileOut( __METHOD__ . '-checks' );
1674                         wfProfileOut( __METHOD__ );
1675                         return $status;
1676                 }
1677
1678                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1679                         if ( $wgUser->isAnon() ) {
1680                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1681                                 wfProfileOut( __METHOD__ . '-checks' );
1682                                 wfProfileOut( __METHOD__ );
1683                                 return $status;
1684                         } else {
1685                                 $status->fatal( 'readonlytext' );
1686                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1687                                 wfProfileOut( __METHOD__ . '-checks' );
1688                                 wfProfileOut( __METHOD__ );
1689                                 return $status;
1690                         }
1691                 }
1692
1693                 if ( wfReadOnly() ) {
1694                         $status->fatal( 'readonlytext' );
1695                         $status->value = self::AS_READ_ONLY_PAGE;
1696                         wfProfileOut( __METHOD__ . '-checks' );
1697                         wfProfileOut( __METHOD__ );
1698                         return $status;
1699                 }
1700                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1701                         $status->fatal( 'actionthrottledtext' );
1702                         $status->value = self::AS_RATE_LIMITED;
1703                         wfProfileOut( __METHOD__ . '-checks' );
1704                         wfProfileOut( __METHOD__ );
1705                         return $status;
1706                 }
1707
1708                 # If the article has been deleted while editing, don't save it without
1709                 # confirmation
1710                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1711                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1712                         wfProfileOut( __METHOD__ . '-checks' );
1713                         wfProfileOut( __METHOD__ );
1714                         return $status;
1715                 }
1716
1717                 wfProfileOut( __METHOD__ . '-checks' );
1718
1719                 # Load the page data from the master. If anything changes in the meantime,
1720                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1721                 $this->mArticle->loadPageData( 'fromdbmaster' );
1722                 $new = !$this->mArticle->exists();
1723
1724                 if ( $new ) {
1725                         // Late check for create permission, just in case *PARANOIA*
1726                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1727                                 $status->fatal( 'nocreatetext' );
1728                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1729                                 wfDebug( __METHOD__ . ": no create permission\n" );
1730                                 wfProfileOut( __METHOD__ );
1731                                 return $status;
1732                         }
1733
1734                         // Don't save a new page if it's blank or if it's a MediaWiki:
1735                         // message with content equivalent to default (allow empty pages
1736                         // in this case to disable messages, see bug 50124)
1737                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1738                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1739                                 $defaultText = $defaultMessageText;
1740                         } else {
1741                                 $defaultText = '';
1742                         }
1743
1744                         if ( $this->textbox1 === $defaultText ) {
1745                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1746                                 wfProfileOut( __METHOD__ );
1747                                 return $status;
1748                         }
1749
1750                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1751                                 wfProfileOut( __METHOD__ );
1752                                 return $status;
1753                         }
1754
1755                         $content = $textbox_content;
1756
1757                         $result['sectionanchor'] = '';
1758                         if ( $this->section == 'new' ) {
1759                                 if ( $this->sectiontitle !== '' ) {
1760                                         // Insert the section title above the content.
1761                                         $content = $content->addSectionHeader( $this->sectiontitle );
1762
1763                                         // Jump to the new section
1764                                         $result['sectionanchor'] =
1765                                                 $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1766
1767                                         // If no edit summary was specified, create one automatically from the section
1768                                         // title and have it link to the new section. Otherwise, respect the summary as
1769                                         // passed.
1770                                         if ( $this->summary === '' ) {
1771                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1772                                                 $this->summary = wfMessage( 'newsectionsummary' )
1773                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1774                                         }
1775                                 } elseif ( $this->summary !== '' ) {
1776                                         // Insert the section title above the content.
1777                                         $content = $content->addSectionHeader( $this->summary );
1778
1779                                         // Jump to the new section
1780                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1781
1782                                         // Create a link to the new section from the edit summary.
1783                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1784                                         $this->summary = wfMessage( 'newsectionsummary' )
1785                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1786                                 }
1787                         }
1788
1789                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1790
1791                 } else { # not $new
1792
1793                         # Article exists. Check for edit conflict.
1794
1795                         $this->mArticle->clear(); # Force reload of dates, etc.
1796                         $timestamp = $this->mArticle->getTimestamp();
1797
1798                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1799
1800                         if ( $timestamp != $this->edittime ) {
1801                                 $this->isConflict = true;
1802                                 if ( $this->section == 'new' ) {
1803                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1804                                                 $this->mArticle->getComment() == $this->summary ) {
1805                                                 // Probably a duplicate submission of a new comment.
1806                                                 // This can happen when squid resends a request after
1807                                                 // a timeout but the first one actually went through.
1808                                                 wfDebug( __METHOD__
1809                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1810                                         } else {
1811                                                 // New comment; suppress conflict.
1812                                                 $this->isConflict = false;
1813                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1814                                         }
1815                                 } elseif ( $this->section == ''
1816                                         && Revision::userWasLastToEdit(
1817                                                 DB_MASTER, $this->mTitle->getArticleID(),
1818                                                 $wgUser->getId(), $this->edittime
1819                                         )
1820                                 ) {
1821                                         # Suppress edit conflict with self, except for section edits where merging is required.
1822                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1823                                         $this->isConflict = false;
1824                                 }
1825                         }
1826
1827                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1828                         if ( $this->sectiontitle !== '' ) {
1829                                 $sectionTitle = $this->sectiontitle;
1830                         } else {
1831                                 $sectionTitle = $this->summary;
1832                         }
1833
1834                         $content = null;
1835
1836                         if ( $this->isConflict ) {
1837                                 wfDebug( __METHOD__
1838                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1839                                         . " (article time '{$timestamp}')\n" );
1840
1841                                 $content = $this->mArticle->replaceSectionContent(
1842                                         $this->section,
1843                                         $textbox_content,
1844                                         $sectionTitle,
1845                                         $this->edittime
1846                                 );
1847                         } else {
1848                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1849                                 $content = $this->mArticle->replaceSectionContent(
1850                                         $this->section,
1851                                         $textbox_content,
1852                                         $sectionTitle
1853                                 );
1854                         }
1855
1856                         if ( is_null( $content ) ) {
1857                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1858                                 $this->isConflict = true;
1859                                 $content = $textbox_content; // do not try to merge here!
1860                         } elseif ( $this->isConflict ) {
1861                                 # Attempt merge
1862                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1863                                         // Successful merge! Maybe we should tell the user the good news?
1864                                         $this->isConflict = false;
1865                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1866                                 } else {
1867                                         $this->section = '';
1868                                         $this->textbox1 = ContentHandler::getContentText( $content );
1869                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1870                                 }
1871                         }
1872
1873                         if ( $this->isConflict ) {
1874                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1875                                 wfProfileOut( __METHOD__ );
1876                                 return $status;
1877                         }
1878
1879                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1880                                 wfProfileOut( __METHOD__ );
1881                                 return $status;
1882                         }
1883
1884                         if ( $this->section == 'new' ) {
1885                                 // Handle the user preference to force summaries here
1886                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1887                                         $this->missingSummary = true;
1888                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1889                                         $status->value = self::AS_SUMMARY_NEEDED;
1890                                         wfProfileOut( __METHOD__ );
1891                                         return $status;
1892                                 }
1893
1894                                 // Do not allow the user to post an empty comment
1895                                 if ( $this->textbox1 == '' ) {
1896                                         $this->missingComment = true;
1897                                         $status->fatal( 'missingcommenttext' );
1898                                         $status->value = self::AS_TEXTBOX_EMPTY;
1899                                         wfProfileOut( __METHOD__ );
1900                                         return $status;
1901                                 }
1902                         } elseif ( !$this->allowBlankSummary
1903                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1904                                 && !$content->isRedirect()
1905                                 && md5( $this->summary ) == $this->autoSumm
1906                         ) {
1907                                 $this->missingSummary = true;
1908                                 $status->fatal( 'missingsummary' );
1909                                 $status->value = self::AS_SUMMARY_NEEDED;
1910                                 wfProfileOut( __METHOD__ );
1911                                 return $status;
1912                         }
1913
1914                         # All's well
1915                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1916                         $sectionanchor = '';
1917                         if ( $this->section == 'new' ) {
1918                                 if ( $this->sectiontitle !== '' ) {
1919                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1920                                         // If no edit summary was specified, create one automatically from the section
1921                                         // title and have it link to the new section. Otherwise, respect the summary as
1922                                         // passed.
1923                                         if ( $this->summary === '' ) {
1924                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1925                                                 $this->summary = wfMessage( 'newsectionsummary' )
1926                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1927                                         }
1928                                 } elseif ( $this->summary !== '' ) {
1929                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1930                                         # This is a new section, so create a link to the new section
1931                                         # in the revision summary.
1932                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1933                                         $this->summary = wfMessage( 'newsectionsummary' )
1934                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1935                                 }
1936                         } elseif ( $this->section != '' ) {
1937                                 # Try to get a section anchor from the section source, redirect
1938                                 # to edited section if header found.
1939                                 # XXX: Might be better to integrate this into Article::replaceSection
1940                                 # for duplicate heading checking and maybe parsing.
1941                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1942                                 # We can't deal with anchors, includes, html etc in the header for now,
1943                                 # headline would need to be parsed to improve this.
1944                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1945                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1946                                 }
1947                         }
1948                         $result['sectionanchor'] = $sectionanchor;
1949                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1950
1951                         // Save errors may fall down to the edit form, but we've now
1952                         // merged the section into full text. Clear the section field
1953                         // so that later submission of conflict forms won't try to
1954                         // replace that into a duplicated mess.
1955                         $this->textbox1 = $this->toEditText( $content );
1956                         $this->section = '';
1957
1958                         $status->value = self::AS_SUCCESS_UPDATE;
1959                 }
1960
1961                 // Check for length errors again now that the section is merged in
1962                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1963                 if ( $this->kblength > $wgMaxArticleSize ) {
1964                         $this->tooBig = true;
1965                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1966                         wfProfileOut( __METHOD__ );
1967                         return $status;
1968                 }
1969
1970                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1971                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1972                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1973                         ( $bot ? EDIT_FORCE_BOT : 0 );
1974
1975                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1976                                                                                                                         false, null, $this->contentFormat );
1977
1978                 if ( !$doEditStatus->isOK() ) {
1979                         // Failure from doEdit()
1980                         // Show the edit conflict page for certain recognized errors from doEdit(),
1981                         // but don't show it for errors from extension hooks
1982                         $errors = $doEditStatus->getErrorsArray();
1983                         if ( in_array( $errors[0][0],
1984                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1985                         ) {
1986                                 $this->isConflict = true;
1987                                 // Destroys data doEdit() put in $status->value but who cares
1988                                 $doEditStatus->value = self::AS_END;
1989                         }
1990                         wfProfileOut( __METHOD__ );
1991                         return $doEditStatus;
1992                 }
1993
1994                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1995                 if ( $result['nullEdit'] ) {
1996                         // We don't know if it was a null edit until now, so increment here
1997                         $wgUser->pingLimiter( 'linkpurge' );
1998                 }
1999                 $result['redirect'] = $content->isRedirect();
2000                 $this->updateWatchlist();
2001                 wfProfileOut( __METHOD__ );
2002                 return $status;
2003         }
2004
2005         /**
2006          * Register the change of watch status
2007          */
2008         protected function updateWatchlist() {
2009                 global $wgUser;
2010
2011                 if ( $wgUser->isLoggedIn()
2012                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
2013                 ) {
2014                         $fname = __METHOD__;
2015                         $title = $this->mTitle;
2016                         $watch = $this->watchthis;
2017
2018                         // Do this in its own transaction to reduce contention...
2019                         $dbw = wfGetDB( DB_MASTER );
2020                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
2021                                 $dbw->begin( $fname );
2022                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
2023                                 $dbw->commit( $fname );
2024                         } );
2025                 }
2026         }
2027
2028         /**
2029          * Attempts to merge text content with base and current revisions
2030          *
2031          * @param string $editText
2032          *
2033          * @return bool
2034          * @deprecated since 1.21, use mergeChangesIntoContent() instead
2035          */
2036         function mergeChangesInto( &$editText ) {
2037                 ContentHandler::deprecated( __METHOD__, "1.21" );
2038
2039                 $editContent = $this->toEditContent( $editText );
2040
2041                 $ok = $this->mergeChangesIntoContent( $editContent );
2042
2043                 if ( $ok ) {
2044                         $editText = $this->toEditText( $editContent );
2045                         return true;
2046                 }
2047                 return false;
2048         }
2049
2050         /**
2051          * Attempts to do 3-way merge of edit content with a base revision
2052          * and current content, in case of edit conflict, in whichever way appropriate
2053          * for the content type.
2054          *
2055          * @since 1.21
2056          *
2057          * @param Content $editContent
2058          *
2059          * @return bool
2060          */
2061         private function mergeChangesIntoContent( &$editContent ) {
2062                 wfProfileIn( __METHOD__ );
2063
2064                 $db = wfGetDB( DB_MASTER );
2065
2066                 // This is the revision the editor started from
2067                 $baseRevision = $this->getBaseRevision();
2068                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2069
2070                 if ( is_null( $baseContent ) ) {
2071                         wfProfileOut( __METHOD__ );
2072                         return false;
2073                 }
2074
2075                 // The current state, we want to merge updates into it
2076                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2077                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2078
2079                 if ( is_null( $currentContent ) ) {
2080                         wfProfileOut( __METHOD__ );
2081                         return false;
2082                 }
2083
2084                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2085
2086                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2087
2088                 if ( $result ) {
2089                         $editContent = $result;
2090                         wfProfileOut( __METHOD__ );
2091                         return true;
2092                 }
2093
2094                 wfProfileOut( __METHOD__ );
2095                 return false;
2096         }
2097
2098         /**
2099          * @return Revision
2100          */
2101         function getBaseRevision() {
2102                 if ( !$this->mBaseRevision ) {
2103                         $db = wfGetDB( DB_MASTER );
2104                         $this->mBaseRevision = Revision::loadFromTimestamp(
2105                                 $db, $this->mTitle, $this->edittime );
2106                 }
2107                 return $this->mBaseRevision;
2108         }
2109
2110         /**
2111          * Check given input text against $wgSpamRegex, and return the text of the first match.
2112          *
2113          * @param string $text
2114          *
2115          * @return string|bool Matching string or false
2116          */
2117         public static function matchSpamRegex( $text ) {
2118                 global $wgSpamRegex;
2119                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2120                 $regexes = (array)$wgSpamRegex;
2121                 return self::matchSpamRegexInternal( $text, $regexes );
2122         }
2123
2124         /**
2125          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2126          *
2127          * @param string $text
2128          *
2129          * @return string|bool Matching string or false
2130          */
2131         public static function matchSummarySpamRegex( $text ) {
2132                 global $wgSummarySpamRegex;
2133                 $regexes = (array)$wgSummarySpamRegex;
2134                 return self::matchSpamRegexInternal( $text, $regexes );
2135         }
2136
2137         /**
2138          * @param string $text
2139          * @param array $regexes
2140          * @return bool|string
2141          */
2142         protected static function matchSpamRegexInternal( $text, $regexes ) {
2143                 foreach ( $regexes as $regex ) {
2144                         $matches = array();
2145                         if ( preg_match( $regex, $text, $matches ) ) {
2146                                 return $matches[0];
2147                         }
2148                 }
2149                 return false;
2150         }
2151
2152         function setHeaders() {
2153                 global $wgOut, $wgUser;
2154
2155                 $wgOut->addModules( 'mediawiki.action.edit' );
2156                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2157
2158                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2159                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2160                 }
2161
2162                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2163                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2164                 }
2165
2166                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2167
2168                 # Enabled article-related sidebar, toplinks, etc.
2169                 $wgOut->setArticleRelated( true );
2170
2171                 $contextTitle = $this->getContextTitle();
2172                 if ( $this->isConflict ) {
2173                         $msg = 'editconflict';
2174                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2175                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2176                 } else {
2177                         $msg = $contextTitle->exists()
2178                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2179                                         && $contextTitle->getDefaultMessageText() !== false
2180                                 )
2181                                 ? 'editing'
2182                                 : 'creating';
2183                 }
2184
2185                 # Use the title defined by DISPLAYTITLE magic word when present
2186                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2187                 if ( $displayTitle === false ) {
2188                         $displayTitle = $contextTitle->getPrefixedText();
2189                 }
2190                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2191         }
2192
2193         /**
2194          * Show all applicable editing introductions
2195          */
2196         protected function showIntro() {
2197                 global $wgOut, $wgUser;
2198                 if ( $this->suppressIntro ) {
2199                         return;
2200                 }
2201
2202                 $namespace = $this->mTitle->getNamespace();
2203
2204                 if ( $namespace == NS_MEDIAWIKI ) {
2205                         # Show a warning if editing an interface message
2206                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2207                 } elseif ( $namespace == NS_FILE ) {
2208                         # Show a hint to shared repo
2209                         $file = wfFindFile( $this->mTitle );
2210                         if ( $file && !$file->isLocal() ) {
2211                                 $descUrl = $file->getDescriptionUrl();
2212                                 # there must be a description url to show a hint to shared repo
2213                                 if ( $descUrl ) {
2214                                         if ( !$this->mTitle->exists() ) {
2215                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2216                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2217                                                 ) );
2218                                         } else {
2219                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2220                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2221                                                 ) );
2222                                         }
2223                                 }
2224                         }
2225                 }
2226
2227                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2228                 # Show log extract when the user is currently blocked
2229                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2230                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2231                         $username = $parts[0];
2232                         $user = User::newFromName( $username, false /* allow IP users*/ );
2233                         $ip = User::isIP( $username );
2234                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2235                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2236                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2237                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
2238                                 LogEventsList::showLogExtract(
2239                                         $wgOut,
2240                                         'block',
2241                                         $user->getUserPage(),
2242                                         '',
2243                                         array(
2244                                                 'lim' => 1,
2245                                                 'showIfEmpty' => false,
2246                                                 'msgKey' => array(
2247                                                         'blocked-notice-logextract',
2248                                                         $user->getName() # Support GENDER in notice
2249                                                 )
2250                                         )
2251                                 );
2252                         }
2253                 }
2254                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2255                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2256                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2257                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2258                         ) );
2259                         if ( $wgUser->isLoggedIn() ) {
2260                                 $wgOut->wrapWikiMsg(
2261                                         // Suppress the external link icon, consider the help url an internal one
2262                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2263                                         array(
2264                                                 'newarticletext',
2265                                                 $helpLink
2266                                         )
2267                                 );
2268                         } else {
2269                                 $wgOut->wrapWikiMsg(
2270                                         // Suppress the external link icon, consider the help url an internal one
2271                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2272                                         array(
2273                                                 'newarticletextanon',
2274                                                 $helpLink
2275                                         )
2276                                 );
2277                         }
2278                 }
2279                 # Give a notice if the user is editing a deleted/moved page...
2280                 if ( !$this->mTitle->exists() ) {
2281                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2282                                 '',
2283                                 array(
2284                                         'lim' => 10,
2285                                         'conds' => array( "log_action != 'revision'" ),
2286                                         'showIfEmpty' => false,
2287                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2288                                 )
2289                         );
2290                 }
2291         }
2292
2293         /**
2294          * Attempt to show a custom editing introduction, if supplied
2295          *
2296          * @return bool
2297          */
2298         protected function showCustomIntro() {
2299                 if ( $this->editintro ) {
2300                         $title = Title::newFromText( $this->editintro );
2301                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2302                                 global $wgOut;
2303                                 // Added using template syntax, to take <noinclude>'s into account.
2304                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2305                                 return true;
2306                         }
2307                 }
2308                 return false;
2309         }
2310
2311         /**
2312          * Gets an editable textual representation of $content.
2313          * The textual representation can be turned by into a Content object by the
2314          * toEditContent() method.
2315          *
2316          * If $content is null or false or a string, $content is returned unchanged.
2317          *
2318          * If the given Content object is not of a type that can be edited using
2319          * the text base EditPage, an exception will be raised. Set
2320          * $this->allowNonTextContent to true to allow editing of non-textual
2321          * content.
2322          *
2323          * @param Content|null|bool|string $content
2324          * @return string The editable text form of the content.
2325          *
2326          * @throws MWException if $content is not an instance of TextContent and
2327          *   $this->allowNonTextContent is not true.
2328          */
2329         protected function toEditText( $content ) {
2330                 if ( $content === null || $content === false ) {
2331                         return $content;
2332                 }
2333
2334                 if ( is_string( $content ) ) {
2335                         return $content;
2336                 }
2337
2338                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2339                         throw new MWException( 'This content model is not supported: '
2340                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2341                 }
2342
2343                 return $content->serialize( $this->contentFormat );
2344         }
2345
2346         /**
2347          * Turns the given text into a Content object by unserializing it.
2348          *
2349          * If the resulting Content object is not of a type that can be edited using
2350          * the text base EditPage, an exception will be raised. Set
2351          * $this->allowNonTextContent to true to allow editing of non-textual
2352          * content.
2353          *
2354          * @param string|null|bool $text Text to unserialize
2355          * @return Content The content object created from $text. If $text was false
2356          *   or null, false resp. null will be  returned instead.
2357          *
2358          * @throws MWException if unserializing the text results in a Content
2359          *   object that is not an instance of TextContent and
2360          *   $this->allowNonTextContent is not true.
2361          */
2362         protected function toEditContent( $text ) {
2363                 if ( $text === false || $text === null ) {
2364                         return $text;
2365                 }
2366
2367                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2368                         $this->contentModel, $this->contentFormat );
2369
2370                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2371                         throw new MWException( 'This content model is not supported: '
2372                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2373                 }
2374
2375                 return $content;
2376         }
2377
2378         /**
2379          * Send the edit form and related headers to $wgOut
2380          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2381          *     during form output near the top, for captchas and the like.
2382          */
2383         function showEditForm( $formCallback = null ) {
2384                 global $wgOut, $wgUser;
2385
2386                 wfProfileIn( __METHOD__ );
2387
2388                 # need to parse the preview early so that we know which templates are used,
2389                 # otherwise users with "show preview after edit box" will get a blank list
2390                 # we parse this near the beginning so that setHeaders can do the title
2391                 # setting work instead of leaving it in getPreviewText
2392                 $previewOutput = '';
2393                 if ( $this->formtype == 'preview' ) {
2394                         $previewOutput = $this->getPreviewText();
2395                 }
2396
2397                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2398
2399                 $this->setHeaders();
2400
2401                 if ( $this->showHeader() === false ) {
2402                         wfProfileOut( __METHOD__ );
2403                         return;
2404                 }
2405
2406                 $wgOut->addHTML( $this->editFormPageTop );
2407
2408                 if ( $wgUser->getOption( 'previewontop' ) ) {
2409                         $this->displayPreviewArea( $previewOutput, true );
2410                 }
2411
2412                 $wgOut->addHTML( $this->editFormTextTop );
2413
2414                 $showToolbar = true;
2415                 if ( $this->wasDeletedSinceLastEdit() ) {
2416                         if ( $this->formtype == 'save' ) {
2417                                 // Hide the toolbar and edit area, user can click preview to get it back
2418                                 // Add an confirmation checkbox and explanation.
2419                                 $showToolbar = false;
2420                         } else {
2421                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2422                                         'deletedwhileediting' );
2423                         }
2424                 }
2425
2426                 // @todo add EditForm plugin interface and use it here!
2427                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2428                 $wgOut->addHTML( Html::openElement(
2429                         'form',
2430                         array(
2431                                 'id' => self::EDITFORM_ID,
2432                                 'name' => self::EDITFORM_ID,
2433                                 'method' => 'post',
2434                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2435                                 'enctype' => 'multipart/form-data'
2436                         )
2437                 ) );
2438
2439                 if ( is_callable( $formCallback ) ) {
2440                         call_user_func_array( $formCallback, array( &$wgOut ) );
2441                 }
2442
2443                 // Add an empty field to trip up spambots
2444                 $wgOut->addHTML(
2445                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2446                         . Html::rawElement(
2447                                 'label',
2448                                 array( 'for' => 'wpAntiSpam' ),
2449                                 wfMessage( 'simpleantispam-label' )->parse()
2450                         )
2451                         . Xml::element(
2452                                 'input',
2453                                 array(
2454                                         'type' => 'text',
2455                                         'name' => 'wpAntispam',
2456                                         'id' => 'wpAntispam',
2457                                         'value' => ''
2458                                 )
2459                         )
2460                         . Xml::closeElement( 'div' )
2461                 );
2462
2463                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2464
2465                 // Put these up at the top to ensure they aren't lost on early form submission
2466                 $this->showFormBeforeText();
2467
2468                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2469                         $username = $this->lastDelete->user_name;
2470                         $comment = $this->lastDelete->log_comment;
2471
2472                         // It is better to not parse the comment at all than to have templates expanded in the middle
2473                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2474                         $key = $comment === ''
2475                                 ? 'confirmrecreate-noreason'
2476                                 : 'confirmrecreate';
2477                         $wgOut->addHTML(
2478                                 '<div class="mw-confirm-recreate">' .
2479                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2480                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2481                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2482                                 ) .
2483                                 '</div>'
2484                         );
2485                 }
2486
2487                 # When the summary is hidden, also hide them on preview/show changes
2488                 if ( $this->nosummary ) {
2489                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2490                 }
2491
2492                 # If a blank edit summary was previously provided, and the appropriate
2493                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2494                 # user being bounced back more than once in the event that a summary
2495                 # is not required.
2496                 #####
2497                 # For a bit more sophisticated detection of blank summaries, hash the
2498                 # automatic one and pass that in the hidden field wpAutoSummary.
2499                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2500                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2501                 }
2502
2503                 if ( $this->undidRev ) {
2504                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2505                 }
2506
2507                 if ( $this->hasPresetSummary ) {
2508                         // If a summary has been preset using &summary= we don't want to prompt for
2509                         // a different summary. Only prompt for a summary if the summary is blanked.
2510                         // (Bug 17416)
2511                         $this->autoSumm = md5( '' );
2512                 }
2513
2514                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2515                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2516
2517                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2518
2519                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2520                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2521
2522                 if ( $this->section == 'new' ) {
2523                         $this->showSummaryInput( true, $this->summary );
2524                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2525                 }
2526
2527                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2528
2529                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2530                         $wgOut->addHTML( EditPage::getEditToolbar() );
2531                 }
2532
2533                 if ( $this->isConflict ) {
2534                         // In an edit conflict bypass the overridable content form method
2535                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2536                         // resolved between page source edits and custom ui edits using the
2537                         // custom edit ui.
2538                         $this->textbox2 = $this->textbox1;
2539
2540                         $content = $this->getCurrentContent();
2541                         $this->textbox1 = $this->toEditText( $content );
2542
2543                         $this->showTextbox1();
2544                 } else {
2545                         $this->showContentForm();
2546                 }
2547
2548                 $wgOut->addHTML( $this->editFormTextAfterContent );
2549
2550                 $this->showStandardInputs();
2551
2552                 $this->showFormAfterText();
2553
2554                 $this->showTosSummary();
2555
2556                 $this->showEditTools();
2557
2558                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2559
2560                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2561                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2562
2563                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2564                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2565
2566                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2567                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2568
2569                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2570
2571                 if ( $this->isConflict ) {
2572                         try {
2573                                 $this->showConflict();
2574                         } catch ( MWContentSerializationException $ex ) {
2575                                 // this can't really happen, but be nice if it does.
2576                                 $msg = wfMessage(
2577                                         'content-failed-to-parse',
2578                                         $this->contentModel,
2579                                         $this->contentFormat,
2580                                         $ex->getMessage()
2581                                 );
2582                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2583                         }
2584                 }
2585
2586                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2587
2588                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2589                         $this->displayPreviewArea( $previewOutput, false );
2590                 }
2591
2592                 wfProfileOut( __METHOD__ );
2593         }
2594
2595         /**
2596          * Extract the section title from current section text, if any.
2597          *
2598          * @param string $text
2599          * @return string|bool string or false
2600          */
2601         public static function extractSectionTitle( $text ) {
2602                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2603                 if ( !empty( $matches[2] ) ) {
2604                         global $wgParser;
2605                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2606                 } else {
2607                         return false;
2608                 }
2609         }
2610
2611         /**
2612          * @return bool
2613          */
2614         protected function showHeader() {
2615                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2616
2617                 if ( $this->mTitle->isTalkPage() ) {
2618                         $wgOut->addWikiMsg( 'talkpagetext' );
2619                 }
2620
2621                 // Add edit notices
2622                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2623
2624                 if ( $this->isConflict ) {
2625                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2626                         $this->edittime = $this->mArticle->getTimestamp();
2627                 } else {
2628                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2629                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2630                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2631                                 // Someone is welcome to try refactoring though
2632                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2633                                 return false;
2634                         }
2635
2636                         if ( $this->section != '' && $this->section != 'new' ) {
2637                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2638                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2639                                         if ( $sectionTitle !== false ) {
2640                                                 $this->summary = "/* $sectionTitle */ ";
2641                                         }
2642                                 }
2643                         }
2644
2645                         if ( $this->missingComment ) {
2646                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2647                         }
2648
2649                         if ( $this->missingSummary && $this->section != 'new' ) {
2650                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2651                         }
2652
2653                         if ( $this->missingSummary && $this->section == 'new' ) {
2654                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2655                         }
2656
2657                         if ( $this->hookError !== '' ) {
2658                                 $wgOut->addWikiText( $this->hookError );
2659                         }
2660
2661                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2662                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2663                         }
2664
2665                         if ( $this->section != 'new' ) {
2666                                 $revision = $this->mArticle->getRevisionFetched();
2667                                 if ( $revision ) {
2668                                         // Let sysop know that this will make private content public if saved
2669
2670                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2671                                                 $wgOut->wrapWikiMsg(
2672                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2673                                                         'rev-deleted-text-permission'
2674                                                 );
2675                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2676                                                 $wgOut->wrapWikiMsg(
2677                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2678                                                         'rev-deleted-text-view'
2679                                                 );
2680                                         }
2681
2682                                         if ( !$revision->isCurrent() ) {
2683                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2684                                                 $wgOut->addWikiMsg( 'editingold' );
2685                                         }
2686                                 } elseif ( $this->mTitle->exists() ) {
2687                                         // Something went wrong
2688
2689                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2690                                                 array( 'missing-revision', $this->oldid ) );
2691                                 }
2692                         }
2693                 }
2694
2695                 if ( wfReadOnly() ) {
2696                         $wgOut->wrapWikiMsg(
2697                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2698                                 array( 'readonlywarning', wfReadOnlyReason() )
2699                         );
2700                 } elseif ( $wgUser->isAnon() ) {
2701                         if ( $this->formtype != 'preview' ) {
2702                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2703                         } else {
2704                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2705                         }
2706                 } else {
2707                         if ( $this->isCssJsSubpage ) {
2708                                 # Check the skin exists
2709                                 if ( $this->isWrongCaseCssJsPage ) {
2710                                         $wgOut->wrapWikiMsg(
2711                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2712                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2713                                         );
2714                                 }
2715                                 if ( $this->formtype !== 'preview' ) {
2716                                         if ( $this->isCssSubpage ) {
2717                                                 $wgOut->wrapWikiMsg(
2718                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2719                                                         array( 'usercssyoucanpreview' )
2720                                                 );
2721                                         }
2722
2723                                         if ( $this->isJsSubpage ) {
2724                                                 $wgOut->wrapWikiMsg(
2725                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2726                                                         array( 'userjsyoucanpreview' )
2727                                                 );
2728                                         }
2729                                 }
2730                         }
2731                 }
2732
2733                 if ( $this->mTitle->isProtected( 'edit' ) &&
2734                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2735                 ) {
2736                         # Is the title semi-protected?
2737                         if ( $this->mTitle->isSemiProtected() ) {
2738                                 $noticeMsg = 'semiprotectedpagewarning';
2739                         } else {
2740                                 # Then it must be protected based on static groups (regular)
2741                                 $noticeMsg = 'protectedpagewarning';
2742                         }
2743                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2744                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2745                 }
2746                 if ( $this->mTitle->isCascadeProtected() ) {
2747                         # Is this page under cascading protection from some source pages?
2748                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2749                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2750                         $cascadeSourcesCount = count( $cascadeSources );
2751                         if ( $cascadeSourcesCount > 0 ) {
2752                                 # Explain, and list the titles responsible
2753                                 foreach ( $cascadeSources as $page ) {
2754                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2755                                 }
2756                         }
2757                         $notice .= '</div>';
2758                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2759                 }
2760                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2761                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2762                                 array( 'lim' => 1,
2763                                         'showIfEmpty' => false,
2764                                         'msgKey' => array( 'titleprotectedwarning' ),
2765                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2766                 }
2767
2768                 if ( $this->kblength === false ) {
2769                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2770                 }
2771
2772                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2773                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2774                                 array(
2775                                         'longpageerror',
2776                                         $wgLang->formatNum( $this->kblength ),
2777                                         $wgLang->formatNum( $wgMaxArticleSize )
2778                                 )
2779                         );
2780                 } else {
2781                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2782                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2783                                         array(
2784                                                 'longpage-hint',
2785                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2786                                                 strlen( $this->textbox1 )
2787                                         )
2788                                 );
2789                         }
2790                 }
2791                 # Add header copyright warning
2792                 $this->showHeaderCopyrightWarning();
2793
2794                 return true;
2795         }
2796
2797         /**
2798          * Standard summary input and label (wgSummary), abstracted so EditPage
2799          * subclasses may reorganize the form.
2800          * Note that you do not need to worry about the label's for=, it will be
2801          * inferred by the id given to the input. You can remove them both by
2802          * passing array( 'id' => false ) to $userInputAttrs.
2803          *
2804          * @param string $summary The value of the summary input
2805          * @param string $labelText The html to place inside the label
2806          * @param array $inputAttrs Array of attrs to use on the input
2807          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2808          *
2809          * @return array An array in the format array( $label, $input )
2810          */
2811         function getSummaryInput( $summary = "", $labelText = null,
2812                 $inputAttrs = null, $spanLabelAttrs = null
2813         ) {
2814                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2815                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2816                         'id' => 'wpSummary',
2817                         'maxlength' => '200',
2818                         'tabindex' => '1',
2819                         'size' => 60,
2820                         'spellcheck' => 'true',
2821                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2822
2823                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2824                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2825                         'id' => "wpSummaryLabel"
2826                 );
2827
2828                 $label = null;
2829                 if ( $labelText ) {
2830                         $label = Xml::tags(
2831                                 'label',
2832                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2833                                 $labelText
2834                         );
2835                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2836                 }
2837
2838                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2839
2840                 return array( $label, $input );
2841         }
2842
2843         /**
2844          * @param bool $isSubjectPreview true if this is the section subject/title
2845          *   up top, or false if this is the comment summary
2846          *   down below the textarea
2847          * @param string $summary The text of the summary to display
2848          * @return string
2849          */
2850         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2851                 global $wgOut, $wgContLang;
2852                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2853                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2854                 if ( $isSubjectPreview ) {
2855                         if ( $this->nosummary ) {
2856                                 return;
2857                         }
2858                 } else {
2859                         if ( !$this->mShowSummaryField ) {
2860                                 return;
2861                         }
2862                 }
2863                 $summary = $wgContLang->recodeForEdit( $summary );
2864                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2865                 list( $label, $input ) = $this->getSummaryInput(
2866                         $summary,
2867                         $labelText,
2868                         array( 'class' => $summaryClass ),
2869                         array()
2870                 );
2871                 $wgOut->addHTML( "{$label} {$input}" );
2872         }
2873
2874         /**
2875          * @param bool $isSubjectPreview true if this is the section subject/title
2876          *   up top, or false if this is the comment summary
2877          *   down below the textarea
2878          * @param string $summary The text of the summary to display
2879          * @return string
2880          */
2881         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2882                 // avoid spaces in preview, gets always trimmed on save
2883                 $summary = trim( $summary );
2884                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2885                         return "";
2886                 }
2887
2888                 global $wgParser;
2889
2890                 if ( $isSubjectPreview ) {
2891                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2892                                 ->inContentLanguage()->text();
2893                 }
2894
2895                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2896
2897                 $summary = wfMessage( $message )->parse()
2898                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2899                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2900         }
2901
2902         protected function showFormBeforeText() {
2903                 global $wgOut;
2904                 $section = htmlspecialchars( $this->section );
2905                 $wgOut->addHTML( <<<HTML
2906 <input type='hidden' value="{$section}" name="wpSection" />
2907 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2908 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2909 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2910
2911 HTML
2912                 );
2913                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2914                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2915                 }
2916         }
2917
2918         protected function showFormAfterText() {
2919                 global $wgOut, $wgUser;
2920                 /**
2921                  * To make it harder for someone to slip a user a page
2922                  * which submits an edit form to the wiki without their
2923                  * knowledge, a random token is associated with the login
2924                  * session. If it's not passed back with the submission,
2925                  * we won't save the page, or render user JavaScript and
2926                  * CSS previews.
2927                  *
2928                  * For anon editors, who may not have a session, we just
2929                  * include the constant suffix to prevent editing from
2930                  * broken text-mangling proxies.
2931                  */
2932                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2933         }
2934
2935         /**
2936          * Subpage overridable method for printing the form for page content editing
2937          * By default this simply outputs wpTextbox1
2938          * Subclasses can override this to provide a custom UI for editing;
2939          * be it a form, or simply wpTextbox1 with a modified content that will be
2940          * reverse modified when extracted from the post data.
2941          * Note that this is basically the inverse for importContentFormData
2942          */
2943         protected function showContentForm() {
2944                 $this->showTextbox1();
2945         }
2946
2947         /**
2948          * Method to output wpTextbox1
2949          * The $textoverride method can be used by subclasses overriding showContentForm
2950          * to pass back to this method.
2951          *
2952          * @param array $customAttribs Array of html attributes to use in the textarea
2953          * @param string $textoverride Optional text to override $this->textarea1 with
2954          */
2955         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2956                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2957                         $attribs = array( 'style' => 'display:none;' );
2958                 } else {
2959                         $classes = array(); // Textarea CSS
2960                         if ( $this->mTitle->isProtected( 'edit' ) &&
2961                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2962                         ) {
2963                                 # Is the title semi-protected?
2964                                 if ( $this->mTitle->isSemiProtected() ) {
2965                                         $classes[] = 'mw-textarea-sprotected';
2966                                 } else {
2967                                         # Then it must be protected based on static groups (regular)
2968                                         $classes[] = 'mw-textarea-protected';
2969                                 }
2970                                 # Is the title cascade-protected?
2971                                 if ( $this->mTitle->isCascadeProtected() ) {
2972                                         $classes[] = 'mw-textarea-cprotected';
2973                                 }
2974                         }
2975
2976                         $attribs = array( 'tabindex' => 1 );
2977
2978                         if ( is_array( $customAttribs ) ) {
2979                                 $attribs += $customAttribs;
2980                         }
2981
2982                         if ( count( $classes ) ) {
2983                                 if ( isset( $attribs['class'] ) ) {
2984                                         $classes[] = $attribs['class'];
2985                                 }
2986                                 $attribs['class'] = implode( ' ', $classes );
2987                         }
2988                 }
2989
2990                 $this->showTextbox(
2991                         $textoverride !== null ? $textoverride : $this->textbox1,
2992                         'wpTextbox1',
2993                         $attribs
2994                 );
2995         }
2996
2997         protected function showTextbox2() {
2998                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2999         }
3000
3001         protected function showTextbox( $text, $name, $customAttribs = array() ) {
3002                 global $wgOut, $wgUser;
3003
3004                 $wikitext = $this->safeUnicodeOutput( $text );
3005                 if ( strval( $wikitext ) !== '' ) {
3006                         // Ensure there's a newline at the end, otherwise adding lines
3007                         // is awkward.
3008                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3009                         // mode will show an extra newline. A bit annoying.
3010                         $wikitext .= "\n";
3011                 }
3012
3013                 $attribs = $customAttribs + array(
3014                         'accesskey' => ',',
3015                         'id' => $name,
3016                         'cols' => $wgUser->getIntOption( 'cols' ),
3017                         'rows' => $wgUser->getIntOption( 'rows' ),
3018                         // Avoid PHP notices when appending preferences
3019                         // (appending allows customAttribs['style'] to still work).
3020                         'style' => ''
3021                 );
3022
3023                 $pageLang = $this->mTitle->getPageLanguage();
3024                 $attribs['lang'] = $pageLang->getCode();
3025                 $attribs['dir'] = $pageLang->getDir();
3026
3027                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3028         }
3029
3030         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3031                 global $wgOut;
3032                 $classes = array();
3033                 if ( $isOnTop ) {
3034                         $classes[] = 'ontop';
3035                 }
3036
3037                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3038
3039                 if ( $this->formtype != 'preview' ) {
3040                         $attribs['style'] = 'display: none;';
3041                 }
3042
3043                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3044
3045                 if ( $this->formtype == 'preview' ) {
3046                         $this->showPreview( $previewOutput );
3047                 }
3048
3049                 $wgOut->addHTML( '</div>' );
3050
3051                 if ( $this->formtype == 'diff' ) {
3052                         try {
3053                                 $this->showDiff();
3054                         } catch ( MWContentSerializationException $ex ) {
3055                                 $msg = wfMessage(
3056                                         'content-failed-to-parse',
3057                                         $this->contentModel,
3058                                         $this->contentFormat,
3059                                         $ex->getMessage()
3060                                 );
3061                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3062                         }
3063                 }
3064         }
3065
3066         /**
3067          * Append preview output to $wgOut.
3068          * Includes category rendering if this is a category page.
3069          *
3070          * @param string $text The HTML to be output for the preview.
3071          */
3072         protected function showPreview( $text ) {
3073                 global $wgOut;
3074                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3075                         $this->mArticle->openShowCategory();
3076                 }
3077                 # This hook seems slightly odd here, but makes things more
3078                 # consistent for extensions.
3079                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3080                 $wgOut->addHTML( $text );
3081                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3082                         $this->mArticle->closeShowCategory();
3083                 }
3084         }
3085
3086         /**
3087          * Get a diff between the current contents of the edit box and the
3088          * version of the page we're editing from.
3089          *
3090          * If this is a section edit, we'll replace the section as for final
3091          * save and then make a comparison.
3092          */
3093         function showDiff() {
3094                 global $wgUser, $wgContLang, $wgOut;
3095
3096                 $oldtitlemsg = 'currentrev';
3097                 # if message does not exist, show diff against the preloaded default
3098                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3099                         $oldtext = $this->mTitle->getDefaultMessageText();
3100                         if ( $oldtext !== false ) {
3101                                 $oldtitlemsg = 'defaultmessagetext';
3102                                 $oldContent = $this->toEditContent( $oldtext );
3103                         } else {
3104                                 $oldContent = null;
3105                         }
3106                 } else {
3107                         $oldContent = $this->getCurrentContent();
3108                 }
3109
3110                 $textboxContent = $this->toEditContent( $this->textbox1 );
3111
3112                 $newContent = $this->mArticle->replaceSectionContent(
3113                                                         $this->section, $textboxContent,
3114                                                         $this->summary, $this->edittime );
3115
3116                 if ( $newContent ) {
3117                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3118                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3119
3120                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3121                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3122                 }
3123
3124                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3125                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3126                         $newtitle = wfMessage( 'yourtext' )->parse();
3127
3128                         if ( !$oldContent ) {
3129                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3130                         }
3131
3132                         if ( !$newContent ) {
3133                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3134                         }
3135
3136                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3137                         $de->setContent( $oldContent, $newContent );
3138
3139                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3140                         $de->showDiffStyle();
3141                 } else {
3142                         $difftext = '';
3143                 }
3144
3145                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3146         }
3147
3148         /**
3149          * Show the header copyright warning.
3150          */
3151         protected function showHeaderCopyrightWarning() {
3152                 $msg = 'editpage-head-copy-warn';
3153                 if ( !wfMessage( $msg )->isDisabled() ) {
3154                         global $wgOut;
3155                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3156                                 'editpage-head-copy-warn' );
3157                 }
3158         }
3159
3160         /**
3161          * Give a chance for site and per-namespace customizations of
3162          * terms of service summary link that might exist separately
3163          * from the copyright notice.
3164          *
3165          * This will display between the save button and the edit tools,
3166          * so should remain short!
3167          */
3168         protected function showTosSummary() {
3169                 $msg = 'editpage-tos-summary';
3170                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3171                 if ( !wfMessage( $msg )->isDisabled() ) {
3172                         global $wgOut;
3173                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3174                         $wgOut->addWikiMsg( $msg );
3175                         $wgOut->addHTML( '</div>' );
3176                 }
3177         }
3178
3179         protected function showEditTools() {
3180                 global $wgOut;
3181                 $wgOut->addHTML( '<div class="mw-editTools">' .
3182                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3183                         '</div>' );
3184         }
3185
3186         /**
3187          * Get the copyright warning
3188          *
3189          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3190          */
3191         protected function getCopywarn() {
3192                 return self::getCopyrightWarning( $this->mTitle );
3193         }
3194
3195         /**
3196          * Get the copyright warning, by default returns wikitext
3197          *
3198          * @param Title $title
3199          * @param string $format Output format, valid values are any function of a Message object
3200          * @return string
3201          */
3202         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3203                 global $wgRightsText;
3204                 if ( $wgRightsText ) {
3205                         $copywarnMsg = array( 'copyrightwarning',
3206                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3207                                 $wgRightsText );
3208                 } else {
3209                         $copywarnMsg = array( 'copyrightwarning2',
3210                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3211                 }
3212                 // Allow for site and per-namespace customization of contribution/copyright notice.
3213                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3214
3215                 return "<div id=\"editpage-copywarn\">\n" .
3216                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3217         }
3218
3219         /**
3220          * Get the Limit report for page previews
3221          *
3222          * @since 1.22
3223          * @param ParserOutput $output ParserOutput object from the parse
3224          * @return string HTML
3225          */
3226         public static function getPreviewLimitReport( $output ) {
3227                 if ( !$output || !$output->getLimitReportData() ) {
3228                         return '';
3229                 }
3230
3231                 wfProfileIn( __METHOD__ );
3232
3233                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3234                         wfMessage( 'limitreport-title' )->parseAsBlock()
3235                 );
3236
3237                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3238                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3239
3240                 $limitReport .= Html::openElement( 'table', array(
3241                         'class' => 'preview-limit-report wikitable'
3242                 ) ) .
3243                         Html::openElement( 'tbody' );
3244
3245                 foreach ( $output->getLimitReportData() as $key => $value ) {
3246                         if ( wfRunHooks( 'ParserLimitReportFormat',
3247                                 array( $key, &$value, &$limitReport, true, true )
3248                         ) ) {
3249                                 $keyMsg = wfMessage( $key );
3250                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3251                                 if ( !$valueMsg->exists() ) {
3252                                         $valueMsg = new RawMessage( '$1' );
3253                                 }
3254                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3255                                         $limitReport .= Html::openElement( 'tr' ) .
3256                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3257                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3258                                                 Html::closeElement( 'tr' );
3259                                 }
3260                         }
3261                 }
3262
3263                 $limitReport .= Html::closeElement( 'tbody' ) .
3264                         Html::closeElement( 'table' ) .
3265                         Html::closeElement( 'div' );
3266
3267                 wfProfileOut( __METHOD__ );
3268
3269                 return $limitReport;
3270         }
3271
3272         protected function showStandardInputs( &$tabindex = 2 ) {
3273                 global $wgOut;
3274                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3275
3276                 if ( $this->section != 'new' ) {
3277                         $this->showSummaryInput( false, $this->summary );
3278                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3279                 }
3280
3281                 $checkboxes = $this->getCheckboxes( $tabindex,
3282                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3283                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3284
3285                 // Show copyright warning.
3286                 $wgOut->addWikiText( $this->getCopywarn() );
3287                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3288
3289                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3290                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3291
3292                 $cancel = $this->getCancelLink();
3293                 if ( $cancel !== '' ) {
3294                         $cancel .= Html::element( 'span',
3295                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3296                                 wfMessage( 'pipe-separator' )->text() );
3297                 }
3298
3299                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3300                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3301                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3302                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3303                         wfMessage( 'newwindow' )->parse();
3304
3305                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3306                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3307                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3308
3309                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3310
3311                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3312         }
3313
3314         /**
3315          * Show an edit conflict. textbox1 is already shown in showEditForm().
3316          * If you want to use another entry point to this function, be careful.
3317          */
3318         protected function showConflict() {
3319                 global $wgOut;
3320
3321                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3322                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3323
3324                         $content1 = $this->toEditContent( $this->textbox1 );
3325                         $content2 = $this->toEditContent( $this->textbox2 );
3326
3327                         $handler = ContentHandler::getForModelID( $this->contentModel );
3328                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3329                         $de->setContent( $content2, $content1 );
3330                         $de->showDiff(
3331                                 wfMessage( 'yourtext' )->parse(),
3332                                 wfMessage( 'storedversion' )->text()
3333                         );
3334
3335                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3336                         $this->showTextbox2();
3337                 }
3338         }
3339
3340         /**
3341          * @return string
3342          */
3343         public function getCancelLink() {
3344                 $cancelParams = array();
3345                 if ( !$this->isConflict && $this->oldid > 0 ) {
3346                         $cancelParams['oldid'] = $this->oldid;
3347                 }
3348
3349                 return Linker::linkKnown(
3350                         $this->getContextTitle(),
3351                         wfMessage( 'cancel' )->parse(),
3352                         array( 'id' => 'mw-editform-cancel' ),
3353                         $cancelParams
3354                 );
3355         }
3356
3357         /**
3358          * Returns the URL to use in the form's action attribute.
3359          * This is used by EditPage subclasses when simply customizing the action
3360          * variable in the constructor is not enough. This can be used when the
3361          * EditPage lives inside of a Special page rather than a custom page action.
3362          *
3363          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3364          * @return string
3365          */
3366         protected function getActionURL( Title $title ) {
3367                 return $title->getLocalURL( array( 'action' => $this->action ) );
3368         }
3369
3370         /**
3371          * Check if a page was deleted while the user was editing it, before submit.
3372          * Note that we rely on the logging table, which hasn't been always there,
3373          * but that doesn't matter, because this only applies to brand new
3374          * deletes.
3375          * @return bool
3376          */
3377         protected function wasDeletedSinceLastEdit() {
3378                 if ( $this->deletedSinceEdit !== null ) {
3379                         return $this->deletedSinceEdit;
3380                 }
3381
3382                 $this->deletedSinceEdit = false;
3383
3384                 if ( $this->mTitle->isDeletedQuick() ) {
3385                         $this->lastDelete = $this->getLastDelete();
3386                         if ( $this->lastDelete ) {
3387                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3388                                 if ( $deleteTime > $this->starttime ) {
3389                                         $this->deletedSinceEdit = true;
3390                                 }
3391                         }
3392                 }
3393
3394                 return $this->deletedSinceEdit;
3395         }
3396
3397         /**
3398          * @return bool|stdClass
3399          */
3400         protected function getLastDelete() {
3401                 $dbr = wfGetDB( DB_SLAVE );
3402                 $data = $dbr->selectRow(
3403                         array( 'logging', 'user' ),
3404                         array(
3405                                 'log_type',
3406                                 'log_action',
3407                                 'log_timestamp',
3408                                 'log_user',
3409                                 'log_namespace',
3410                                 'log_title',
3411                                 'log_comment',
3412                                 'log_params',
3413                                 'log_deleted',
3414                                 'user_name'
3415                         ), array(
3416                                 'log_namespace' => $this->mTitle->getNamespace(),
3417                                 'log_title' => $this->mTitle->getDBkey(),
3418                                 'log_type' => 'delete',
3419                                 'log_action' => 'delete',
3420                                 'user_id=log_user'
3421                         ),
3422                         __METHOD__,
3423                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3424                 );
3425                 // Quick paranoid permission checks...
3426                 if ( is_object( $data ) ) {
3427                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3428                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3429                         }
3430
3431                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3432                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3433                         }
3434                 }
3435
3436                 return $data;
3437         }
3438
3439         /**
3440          * Get the rendered text for previewing.
3441          * @throws MWException
3442          * @return string
3443          */
3444         function getPreviewText() {
3445                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3446
3447                 wfProfileIn( __METHOD__ );
3448
3449                 if ( $wgRawHtml && !$this->mTokenOk ) {
3450                         // Could be an offsite preview attempt. This is very unsafe if
3451                         // HTML is enabled, as it could be an attack.
3452                         $parsedNote = '';
3453                         if ( $this->textbox1 !== '' ) {
3454                                 // Do not put big scary notice, if previewing the empty
3455                                 // string, which happens when you initially edit
3456                                 // a category page, due to automatic preview-on-open.
3457                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3458                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3459                         }
3460                         wfProfileOut( __METHOD__ );
3461                         return $parsedNote;
3462                 }
3463
3464                 $note = '';
3465
3466                 try {
3467                         $content = $this->toEditContent( $this->textbox1 );
3468
3469                         $previewHTML = '';
3470                         if ( !wfRunHooks(
3471                                 'AlternateEditPreview',
3472                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3473                         ) {
3474                                 wfProfileOut( __METHOD__ );
3475                                 return $previewHTML;
3476                         }
3477
3478                         # provide a anchor link to the editform
3479                         $continueEditing = '<span class="mw-continue-editing">' .
3480                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3481                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3482                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3483                                 if ( $this->mTokenOkExceptSuffix ) {
3484                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3485
3486                                 } else {
3487                                         $note = wfMessage( 'session_fail_preview' )->plain();
3488                                 }
3489                         } elseif ( $this->incompleteForm ) {
3490                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3491                         } else {
3492                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3493                         }
3494
3495                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3496                         $parserOptions->setEditSection( false );
3497                         $parserOptions->setIsPreview( true );
3498                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3499
3500                         # don't parse non-wikitext pages, show message about preview
3501                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3502                                 if ( $this->mTitle->isCssJsSubpage() ) {
3503                                         $level = 'user';
3504                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3505                                         $level = 'site';
3506                                 } else {
3507                                         $level = false;
3508                                 }
3509
3510                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3511                                         $format = 'css';
3512                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3513                                         $format = 'js';
3514                                 } else {
3515                                         $format = false;
3516                                 }
3517
3518                                 # Used messages to make sure grep find them:
3519                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3520                                 if ( $level && $format ) {
3521                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3522                                                 wfMessage( "{$level}{$format}preview" )->text() .
3523                                                 ' ' . $continueEditing . "</div>";
3524                                 }
3525                         }
3526
3527                         # If we're adding a comment, we need to show the
3528                         # summary as the headline
3529                         if ( $this->section === "new" && $this->summary !== "" ) {
3530                                 $content = $content->addSectionHeader( $this->summary );
3531                         }
3532
3533                         $hook_args = array( $this, &$content );
3534                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3535                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3536
3537                         $parserOptions->enableLimitReport();
3538
3539                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3540                         # But it's now deprecated, so never mind
3541
3542                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3543                         $parserOutput = $content->getParserOutput(
3544                                 $this->getArticle()->getTitle(),
3545                                 null,
3546                                 $parserOptions
3547                         );
3548
3549                         $previewHTML = $parserOutput->getText();
3550                         $this->mParserOutput = $parserOutput;
3551                         $wgOut->addParserOutputNoText( $parserOutput );
3552
3553                         if ( count( $parserOutput->getWarnings() ) ) {
3554                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3555                         }
3556                 } catch ( MWContentSerializationException $ex ) {
3557                         $m = wfMessage(
3558                                 'content-failed-to-parse',
3559                                 $this->contentModel,
3560                                 $this->contentFormat,
3561                                 $ex->getMessage()
3562                         );
3563                         $note .= "\n\n" . $m->parse();
3564                         $previewHTML = '';
3565                 }
3566
3567                 if ( $this->isConflict ) {
3568                         $conflict = '<h2 id="mw-previewconflict">'
3569                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3570                 } else {
3571                         $conflict = '<hr />';
3572                 }
3573
3574                 $previewhead = "<div class='previewnote'>\n" .
3575                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3576                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3577
3578                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3579                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3580                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3581                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3582
3583                 wfProfileOut( __METHOD__ );
3584                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3585         }
3586
3587         /**
3588          * @return array
3589          */
3590         function getTemplates() {
3591                 if ( $this->preview || $this->section != '' ) {
3592                         $templates = array();
3593                         if ( !isset( $this->mParserOutput ) ) {
3594                                 return $templates;
3595                         }
3596                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3597                                 foreach ( array_keys( $template ) as $dbk ) {
3598                                         $templates[] = Title::makeTitle( $ns, $dbk );
3599                                 }
3600                         }
3601                         return $templates;
3602                 } else {
3603                         return $this->mTitle->getTemplateLinksFrom();
3604                 }
3605         }
3606
3607         /**
3608          * Shows a bulletin board style toolbar for common editing functions.
3609          * It can be disabled in the user preferences.
3610          * The necessary JavaScript code can be found in skins/common/edit.js.
3611          *
3612          * @return string
3613          */
3614         static function getEditToolbar() {
3615                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3616                 global $wgEnableUploads, $wgForeignFileRepos;
3617
3618                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3619
3620                 /**
3621                  * $toolarray is an array of arrays each of which includes the
3622                  * filename of the button image (without path), the opening
3623                  * tag, the closing tag, optionally a sample text that is
3624                  * inserted between the two when no selection is highlighted
3625                  * and.  The tip text is shown when the user moves the mouse
3626                  * over the button.
3627                  *
3628                  * Also here: accesskeys (key), which are not used yet until
3629                  * someone can figure out a way to make them work in
3630                  * IE. However, we should make sure these keys are not defined
3631                  * on the edit page.
3632                  */
3633                 $toolarray = array(
3634                         array(
3635                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3636                                 'id'     => 'mw-editbutton-bold',
3637                                 'open'   => '\'\'\'',
3638                                 'close'  => '\'\'\'',
3639                                 'sample' => wfMessage( 'bold_sample' )->text(),
3640                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3641                                 'key'    => 'B'
3642                         ),
3643                         array(
3644                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3645                                 'id'     => 'mw-editbutton-italic',
3646                                 'open'   => '\'\'',
3647                                 'close'  => '\'\'',
3648                                 'sample' => wfMessage( 'italic_sample' )->text(),
3649                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3650                                 'key'    => 'I'
3651                         ),
3652                         array(
3653                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3654                                 'id'     => 'mw-editbutton-link',
3655                                 'open'   => '[[',
3656                                 'close'  => ']]',
3657                                 'sample' => wfMessage( 'link_sample' )->text(),
3658                                 'tip'    => wfMessage( 'link_tip' )->text(),
3659                                 'key'    => 'L'
3660                         ),
3661                         array(
3662                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3663                                 'id'     => 'mw-editbutton-extlink',
3664                                 'open'   => '[',
3665                                 'close'  => ']',
3666                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3667                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3668                                 'key'    => 'X'
3669                         ),
3670                         array(
3671                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3672                                 'id'     => 'mw-editbutton-headline',
3673                                 'open'   => "\n== ",
3674                                 'close'  => " ==\n",
3675                                 'sample' => wfMessage( 'headline_sample' )->text(),
3676                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3677                                 'key'    => 'H'
3678                         ),
3679                         $imagesAvailable ? array(
3680                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3681                                 'id'     => 'mw-editbutton-image',
3682                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3683                                 'close'  => ']]',
3684                                 'sample' => wfMessage( 'image_sample' )->text(),
3685                                 'tip'    => wfMessage( 'image_tip' )->text(),
3686                                 'key'    => 'D',
3687                         ) : false,
3688                         $imagesAvailable ? array(
3689                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3690                                 'id'     => 'mw-editbutton-media',
3691                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3692                                 'close'  => ']]',
3693                                 'sample' => wfMessage( 'media_sample' )->text(),
3694                                 'tip'    => wfMessage( 'media_tip' )->text(),
3695                                 'key'    => 'M'
3696                         ) : false,
3697                         array(
3698                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3699                                 'id'     => 'mw-editbutton-nowiki',
3700                                 'open'   => "<nowiki>",
3701                                 'close'  => "</nowiki>",
3702                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3703                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3704                                 'key'    => 'N'
3705                         ),
3706                         array(
3707                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3708                                 'id'     => 'mw-editbutton-signature',
3709                                 'open'   => '--~~~~',
3710                                 'close'  => '',
3711                                 'sample' => '',
3712                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3713                                 'key'    => 'Y'
3714                         ),
3715                         array(
3716                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3717                                 'id'     => 'mw-editbutton-hr',
3718                                 'open'   => "\n----\n",
3719                                 'close'  => '',
3720                                 'sample' => '',
3721                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3722                                 'key'    => 'R'
3723                         )
3724                 );
3725
3726                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3727                 foreach ( $toolarray as $tool ) {
3728                         if ( !$tool ) {
3729                                 continue;
3730                         }
3731
3732                         $params = array(
3733                                 $wgStylePath . '/common/images/' . $tool['image'],
3734                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3735                                 // Older browsers show a "speedtip" type message only for ALT.
3736                                 // Ideally these should be different, realistically they
3737                                 // probably don't need to be.
3738                                 $tool['tip'],
3739                                 $tool['open'],
3740                                 $tool['close'],
3741                                 $tool['sample'],
3742                                 $tool['id'],
3743                         );
3744
3745                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3746                 }
3747
3748                 // This used to be called on DOMReady from mediawiki.action.edit, which
3749                 // ended up causing race conditions with the setup code above.
3750                 $script .= "\n" .
3751                         "// Create button bar\n" .
3752                         "$(function() { mw.toolbar.init(); } );\n";
3753
3754                 $script .= '});';
3755                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3756
3757                 $toolbar = '<div id="toolbar"></div>';
3758
3759                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3760
3761                 return $toolbar;
3762         }
3763
3764         /**
3765          * Returns an array of html code of the following checkboxes:
3766          * minor and watch
3767          *
3768          * @param int $tabindex Current tabindex
3769          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3770          *                 status of the checkbox
3771          *
3772          * @return array
3773          */
3774         public function getCheckboxes( &$tabindex, $checked ) {
3775                 global $wgUser;
3776
3777                 $checkboxes = array();
3778
3779                 // don't show the minor edit checkbox if it's a new page or section
3780                 if ( !$this->isNew ) {
3781                         $checkboxes['minor'] = '';
3782                         $minorLabel = wfMessage( 'minoredit' )->parse();
3783                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3784                                 $attribs = array(
3785                                         'tabindex' => ++$tabindex,
3786                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3787                                         'id' => 'wpMinoredit',
3788                                 );
3789                                 $checkboxes['minor'] =
3790                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3791                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3792                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3793                                         ">{$minorLabel}</label>";
3794                         }
3795                 }
3796
3797                 $watchLabel = wfMessage( 'watchthis' )->parse();
3798                 $checkboxes['watch'] = '';
3799                 if ( $wgUser->isLoggedIn() ) {
3800                         $attribs = array(
3801                                 'tabindex' => ++$tabindex,
3802                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3803                                 'id' => 'wpWatchthis',
3804                         );
3805                         $checkboxes['watch'] =
3806                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3807                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3808                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3809                                 ">{$watchLabel}</label>";
3810                 }
3811                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3812                 return $checkboxes;
3813         }
3814
3815         /**
3816          * Returns an array of html code of the following buttons:
3817          * save, diff, preview and live
3818          *
3819          * @param int $tabindex Current tabindex
3820          *
3821          * @return array
3822          */
3823         public function getEditButtons( &$tabindex ) {
3824                 $buttons = array();
3825
3826                 // @todo FIXME: Hardcoded square brackets.
3827                 $temp = array(
3828                         'id' => 'wpSave',
3829                         'name' => 'wpSave',
3830                         'type' => 'submit',
3831                         'tabindex' => ++$tabindex,
3832                         'value' => wfMessage( 'savearticle' )->text(),
3833                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3834                         'title' => wfMessage( 'tooltip-save' )->text()
3835                                 . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3836                 );
3837                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3838
3839                 ++$tabindex; // use the same for preview and live preview
3840                 // @todo FIXME: Hardcoded square brackets.
3841                 $temp = array(
3842                         'id' => 'wpPreview',
3843                         'name' => 'wpPreview',
3844                         'type' => 'submit',
3845                         'tabindex' => $tabindex,
3846                         'value' => wfMessage( 'showpreview' )->text(),
3847                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3848                         'title' => wfMessage( 'tooltip-preview' )->text()
3849                                 . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3850                 );
3851                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3852                 $buttons['live'] = '';
3853
3854                 // @todo FIXME: Hardcoded square brackets.
3855                 $temp = array(
3856                         'id' => 'wpDiff',
3857                         'name' => 'wpDiff',
3858                         'type' => 'submit',
3859                         'tabindex' => ++$tabindex,
3860                         'value' => wfMessage( 'showdiff' )->text(),
3861                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3862                         'title' => wfMessage( 'tooltip-diff' )->text()
3863                                 . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3864                 );
3865                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3866
3867                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3868                 return $buttons;
3869         }
3870
3871         /**
3872          * Output preview text only. This can be sucked into the edit page
3873          * via JavaScript, and saves the server time rendering the skin as
3874          * well as theoretically being more robust on the client (doesn't
3875          * disturb the edit box's undo history, won't eat your text on
3876          * failure, etc).
3877          *
3878          * @todo This doesn't include category or interlanguage links.
3879          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3880          *       or something...</s>" that might also require more skin
3881          *       initialization, so check whether that's a problem.
3882          */
3883         function livePreview() {
3884                 global $wgOut;
3885                 $wgOut->disable();
3886                 header( 'Content-type: text/xml; charset=utf-8' );
3887                 header( 'Cache-control: no-cache' );
3888
3889                 $previewText = $this->getPreviewText();
3890                 #$categories = $skin->getCategoryLinks();
3891
3892                 $s =
3893                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3894                 Xml::tags( 'livepreview', null,
3895                         Xml::element( 'preview', null, $previewText )
3896                         #.      Xml::element( 'category', null, $categories )
3897                 );
3898                 echo $s;
3899         }
3900
3901         /**
3902          * Call the stock "user is blocked" page
3903          *
3904          * @deprecated since 1.19; throw an exception directly instead
3905          */
3906         function blockedPage() {
3907                 wfDeprecated( __METHOD__, '1.19' );
3908                 global $wgUser;
3909
3910                 throw new UserBlockedError( $wgUser->getBlock() );
3911         }
3912
3913         /**
3914          * Produce the stock "please login to edit pages" page
3915          *
3916          * @deprecated since 1.19; throw an exception directly instead
3917          */
3918         function userNotLoggedInPage() {
3919                 wfDeprecated( __METHOD__, '1.19' );
3920                 throw new PermissionsError( 'edit' );
3921         }
3922
3923         /**
3924          * Show an error page saying to the user that he has insufficient permissions
3925          * to create a new page
3926          *
3927          * @deprecated since 1.19; throw an exception directly instead
3928          */
3929         function noCreatePermission() {
3930                 wfDeprecated( __METHOD__, '1.19' );
3931                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3932                 throw new PermissionsError( $permission );
3933         }
3934
3935         /**
3936          * Creates a basic error page which informs the user that
3937          * they have attempted to edit a nonexistent section.
3938          */
3939         function noSuchSectionPage() {
3940                 global $wgOut;
3941
3942                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3943
3944                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3945                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3946                 $wgOut->addHTML( $res );
3947
3948                 $wgOut->returnToMain( false, $this->mTitle );
3949         }
3950
3951         /**
3952          * Show "your edit contains spam" page with your diff and text
3953          *
3954          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3955          */
3956         public function spamPageWithContent( $match = false ) {
3957                 global $wgOut, $wgLang;
3958                 $this->textbox2 = $this->textbox1;
3959
3960                 if ( is_array( $match ) ) {
3961                         $match = $wgLang->listToText( $match );
3962                 }
3963                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3964
3965                 $wgOut->addHTML( '<div id="spamprotected">' );
3966                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3967                 if ( $match ) {
3968                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3969                 }
3970                 $wgOut->addHTML( '</div>' );
3971
3972                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3973                 $this->showDiff();
3974
3975                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3976                 $this->showTextbox2();
3977
3978                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3979         }
3980
3981         /**
3982          * Check if the browser is on a blacklist of user-agents known to
3983          * mangle UTF-8 data on form submission. Returns true if Unicode
3984          * should make it through, false if it's known to be a problem.
3985          * @return bool
3986          */
3987         private function checkUnicodeCompliantBrowser() {
3988                 global $wgBrowserBlackList, $wgRequest;
3989
3990                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3991                 if ( $currentbrowser === false ) {
3992                         // No User-Agent header sent? Trust it by default...
3993                         return true;
3994                 }
3995
3996                 foreach ( $wgBrowserBlackList as $browser ) {
3997                         if ( preg_match( $browser, $currentbrowser ) ) {
3998                                 return false;
3999                         }
4000                 }
4001                 return true;
4002         }
4003
4004         /**
4005          * Filter an input field through a Unicode de-armoring process if it
4006          * came from an old browser with known broken Unicode editing issues.
4007          *
4008          * @param WebRequest $request
4009          * @param string $field
4010          * @return string
4011          */
4012         protected function safeUnicodeInput( $request, $field ) {
4013                 $text = rtrim( $request->getText( $field ) );
4014                 return $request->getBool( 'safemode' )
4015                         ? $this->unmakeSafe( $text )
4016                         : $text;
4017         }
4018
4019         /**
4020          * Filter an output field through a Unicode armoring process if it is
4021          * going to an old browser with known broken Unicode editing issues.
4022          *
4023          * @param string $text
4024          * @return string
4025          */
4026         protected function safeUnicodeOutput( $text ) {
4027                 global $wgContLang;
4028                 $codedText = $wgContLang->recodeForEdit( $text );
4029                 return $this->checkUnicodeCompliantBrowser()
4030                         ? $codedText
4031                         : $this->makeSafe( $codedText );
4032         }
4033
4034         /**
4035          * A number of web browsers are known to corrupt non-ASCII characters
4036          * in a UTF-8 text editing environment. To protect against this,
4037          * detected browsers will be served an armored version of the text,
4038          * with non-ASCII chars converted to numeric HTML character references.
4039          *
4040          * Preexisting such character references will have a 0 added to them
4041          * to ensure that round-trips do not alter the original data.
4042          *
4043          * @param string $invalue
4044          * @return string
4045          */
4046         private function makeSafe( $invalue ) {
4047                 // Armor existing references for reversibility.
4048                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4049
4050                 $bytesleft = 0;
4051                 $result = "";
4052                 $working = 0;
4053                 $valueLength = strlen( $invalue );
4054                 for ( $i = 0; $i < $valueLength; $i++ ) {
4055                         $bytevalue = ord( $invalue[$i] );
4056                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4057                                 $result .= chr( $bytevalue );
4058                                 $bytesleft = 0;
4059                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4060                                 $working = $working << 6;
4061                                 $working += ( $bytevalue & 0x3F );
4062                                 $bytesleft--;
4063                                 if ( $bytesleft <= 0 ) {
4064                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4065                                 }
4066                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4067                                 $working = $bytevalue & 0x1F;
4068                                 $bytesleft = 1;
4069                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4070                                 $working = $bytevalue & 0x0F;
4071                                 $bytesleft = 2;
4072                         } else { // 1111 0xxx
4073                                 $working = $bytevalue & 0x07;
4074                                 $bytesleft = 3;
4075                         }
4076                 }
4077                 return $result;
4078         }
4079
4080         /**
4081          * Reverse the previously applied transliteration of non-ASCII characters
4082          * back to UTF-8. Used to protect data from corruption by broken web browsers
4083          * as listed in $wgBrowserBlackList.
4084          *
4085          * @param string $invalue
4086          * @return string
4087          */
4088         private function unmakeSafe( $invalue ) {
4089                 $result = "";
4090                 $valueLength = strlen( $invalue );
4091                 for ( $i = 0; $i < $valueLength; $i++ ) {
4092                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4093                                 $i += 3;
4094                                 $hexstring = "";
4095                                 do {
4096                                         $hexstring .= $invalue[$i];
4097                                         $i++;
4098                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4099
4100                                 // Do some sanity checks. These aren't needed for reversibility,
4101                                 // but should help keep the breakage down if the editor
4102                                 // breaks one of the entities whilst editing.
4103                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
4104                                         $codepoint = hexdec( $hexstring );
4105                                         $result .= codepointToUtf8( $codepoint );
4106                                 } else {
4107                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4108                                 }
4109                         } else {
4110                                 $result .= substr( $invalue, $i, 1 );
4111                         }
4112                 }
4113                 // reverse the transform that we made for reversibility reasons.
4114                 return strtr( $result, array( "&#x0" => "&#x" ) );
4115         }
4116 }