includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: 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                                 // If we receive the last parameter of the request, we can fairly
 801                                 // claim the POST request has not been truncated.
 802
 803                                 // TODO: softened the check for cutover.  Once we determine
 804                                 // that it is safe, we should complete the transition by
 805                                 // removing the "edittime" clause.
 806                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' ) && is_null( $this->edittime ) );
 807                         }
 808                         if ( $this->incompleteForm ) {
 809                                 # If the form is incomplete, force to preview.
 810                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 811                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 812                                 $this->preview = true;
 813                         } else {
 814                                 /* Fallback for live preview */
 815                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 816                                 $this->diff = $request->getCheck( 'wpDiff' );
 817
 818                                 // Remember whether a save was requested, so we can indicate
 819                                 // if we forced preview due to session failure.
 820                                 $this->mTriedSave = !$this->preview;
 821
 822                                 if ( $this->tokenOk( $request ) ) {
 823                                         # Some browsers will not report any submit button
 824                                         # if the user hits enter in the comment box.
 825                                         # The unmarked state will be assumed to be a save,
 826                                         # if the form seems otherwise complete.
 827                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 828                                 } elseif ( $this->diff ) {
 829                                         # Failed token check, but only requested "Show Changes".
 830                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 831                                 } else {
 832                                         # Page might be a hack attempt posted from
 833                                         # an external site. Preview instead of saving.
 834                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 835                                         $this->preview = true;
 836                                 }
 837                         }
 838                         $this->save = !$this->preview && !$this->diff;
 839                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 840                                 $this->edittime = null;
 841                         }
 842
 843                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 844                                 $this->starttime = null;
 845                         }
 846
 847                         $this->recreate = $request->getCheck( 'wpRecreate' );
 848
 849                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 850                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 851
 852                         # Don't force edit summaries when a user is editing their own user or talk page
 853                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 854                                 && $this->mTitle->getText() == $wgUser->getName()
 855                         ) {
 856                                 $this->allowBlankSummary = true;
 857                         } else {
 858                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 859                                         || !$wgUser->getOption( 'forceeditsummary' );
 860                         }
 861
 862                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 863                 } else {
 864                         # Not a posted form? Start with nothing.
 865                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 866                         $this->textbox1 = '';
 867                         $this->summary = '';
 868                         $this->sectiontitle = '';
 869                         $this->edittime = '';
 870                         $this->starttime = wfTimestampNow();
 871                         $this->edit = false;
 872                         $this->preview = false;
 873                         $this->save = false;
 874                         $this->diff = false;
 875                         $this->minoredit = false;
 876                         // Watch may be overridden by request parameters
 877                         $this->watchthis = $request->getBool( 'watchthis', false );
 878                         $this->recreate = false;
 879
 880                         // When creating a new section, we can preload a section title by passing it as the
 881                         // preloadtitle parameter in the URL (Bug 13100)
 882                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 883                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 884                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 885                                 $this->summary = $request->getVal( 'preloadtitle' );
 886                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 887                                 $this->summary = $request->getText( 'summary' );
 888                                 if ( $this->summary !== '' ) {
 889                                         $this->hasPresetSummary = true;
 890                                 }
 891                         }
 892
 893                         if ( $request->getVal( 'minor' ) ) {
 894                                 $this->minoredit = true;
 895                         }
 896                 }
 897
 898                 $this->oldid = $request->getInt( 'oldid' );
 899
 900                 $this->bot = $request->getBool( 'bot', true );
 901                 $this->nosummary = $request->getBool( 'nosummary' );
 902
 903                 // May be overridden by revision.
 904                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 905                 // May be overridden by revision.
 906                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 907
 908                 if ( !ContentHandler::getForModelID( $this->contentModel )
 909                         ->isSupportedFormat( $this->contentFormat )
 910                 ) {
 911                         throw new ErrorPageError(
 912                                 'editpage-notsupportedcontentformat-title',
 913                                 'editpage-notsupportedcontentformat-text',
 914                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 915                         );
 916                 }
 917
 918                 /**
 919                  * @todo Check if the desired model is allowed in this namespace, and if
 920                  *   a transition from the page's current model to the new model is
 921                  *   allowed.
 922                  */
 923
 924                 $this->live = $request->getCheck( 'live' );
 925                 $this->editintro = $request->getText( 'editintro',
 926                         // Custom edit intro for new sections
 927                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 928
 929                 // Allow extensions to modify form data
 930                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 931
 932                 wfProfileOut( __METHOD__ );
 933         }
 934
 935         /**
 936          * Subpage overridable method for extracting the page content data from the
 937          * posted form to be placed in $this->textbox1, if using customized input
 938          * this method should be overridden and return the page text that will be used
 939          * for saving, preview parsing and so on...
 940          *
 941          * @param WebRequest $request
 942          */
 943         protected function importContentFormData( &$request ) {
 944                 return; // Don't do anything, EditPage already extracted wpTextbox1
 945         }
 946
 947         /**
 948          * Initialise form fields in the object
 949          * Called on the first invocation, e.g. when a user clicks an edit link
 950          * @return bool If the requested section is valid
 951          */
 952         function initialiseForm() {
 953                 global $wgUser;
 954                 $this->edittime = $this->mArticle->getTimestamp();
 955
 956                 $content = $this->getContentObject( false ); #TODO: track content object?!
 957                 if ( $content === false ) {
 958                         return false;
 959                 }
 960                 $this->textbox1 = $this->toEditText( $content );
 961
 962                 // activate checkboxes if user wants them to be always active
 963                 # Sort out the "watch" checkbox
 964                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 965                         # Watch all edits
 966                         $this->watchthis = true;
 967                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 968                         # Watch creations
 969                         $this->watchthis = true;
 970                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 971                         # Already watched
 972                         $this->watchthis = true;
 973                 }
 974                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 975                         $this->minoredit = true;
 976                 }
 977                 if ( $this->textbox1 === false ) {
 978                         return false;
 979                 }
 980                 return true;
 981         }
 982
 983         /**
 984          * Fetch initial editing page content.
 985          *
 986          * @param string|bool $def_text
 987          * @return string|bool string on success, $def_text for invalid sections
 988          * @private
 989          * @deprecated since 1.21, get WikiPage::getContent() instead.
 990          */
 991         function getContent( $def_text = false ) {
 992                 ContentHandler::deprecated( __METHOD__, '1.21' );
 993
 994                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 995                         $def_content = $this->toEditContent( $def_text );
 996                 } else {
 997                         $def_content = false;
 998                 }
 999
1000                 $content = $this->getContentObject( $def_content );
1001
1002                 // Note: EditPage should only be used with text based content anyway.
1003                 return $this->toEditText( $content );
1004         }
1005
1006         /**
1007          * @param Content|null $def_content The default value to return
1008          *
1009          * @return Content|null Content on success, $def_content for invalid sections
1010          *
1011          * @since 1.21
1012          */
1013         protected function getContentObject( $def_content = null ) {
1014                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1015
1016                 wfProfileIn( __METHOD__ );
1017
1018                 $content = false;
1019
1020                 // For message page not locally set, use the i18n message.
1021                 // For other non-existent articles, use preload text if any.
1022                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1023                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1024                                 # If this is a system message, get the default text.
1025                                 $msg = $this->mTitle->getDefaultMessageText();
1026
1027                                 $content = $this->toEditContent( $msg );
1028                         }
1029                         if ( $content === false ) {
1030                                 # If requested, preload some text.
1031                                 $preload = $wgRequest->getVal( 'preload',
1032                                         // Custom preload text for new sections
1033                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1034                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1035
1036                                 $content = $this->getPreloadedContent( $preload, $params );
1037                         }
1038                 // For existing pages, get text based on "undo" or section parameters.
1039                 } else {
1040                         if ( $this->section != '' ) {
1041                                 // Get section edit text (returns $def_text for invalid sections)
1042                                 $orig = $this->getOriginalContent( $wgUser );
1043                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1044
1045                                 if ( !$content ) {
1046                                         $content = $def_content;
1047                                 }
1048                         } else {
1049                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1050                                 $undo = $wgRequest->getInt( 'undo' );
1051
1052                                 if ( $undo > 0 && $undoafter > 0 ) {
1053
1054                                         $undorev = Revision::newFromId( $undo );
1055                                         $oldrev = Revision::newFromId( $undoafter );
1056
1057                                         # Sanity check, make sure it's the right page,
1058                                         # the revisions exist and they were not deleted.
1059                                         # Otherwise, $content will be left as-is.
1060                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1061                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1062                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1063
1064                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1065
1066                                                 if ( $content === false ) {
1067                                                         # Warn the user that something went wrong
1068                                                         $undoMsg = 'failure';
1069                                                 } else {
1070                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1071                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1072                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1073
1074                                                         if ( $newContent->equals( $oldContent ) ) {
1075                                                                 # Tell the user that the undo results in no change,
1076                                                                 # i.e. the revisions were already undone.
1077                                                                 $undoMsg = 'nochange';
1078                                                                 $content = false;
1079                                                         } else {
1080                                                                 # Inform the user of our success and set an automatic edit summary
1081                                                                 $undoMsg = 'success';
1082
1083                                                                 # If we just undid one rev, use an autosummary
1084                                                                 $firstrev = $oldrev->getNext();
1085                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1086                                                                         $userText = $undorev->getUserText();
1087                                                                         if ( $userText === '' ) {
1088                                                                                 $undoSummary = wfMessage(
1089                                                                                         'undo-summary-username-hidden',
1090                                                                                         $undo
1091                                                                                 )->inContentLanguage()->text();
1092                                                                         } else {
1093                                                                                 $undoSummary = wfMessage(
1094                                                                                         'undo-summary',
1095                                                                                         $undo,
1096                                                                                         $userText
1097                                                                                 )->inContentLanguage()->text();
1098                                                                         }
1099                                                                         if ( $this->summary === '' ) {
1100                                                                                 $this->summary = $undoSummary;
1101                                                                         } else {
1102                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1103                                                                                         ->inContentLanguage()->text() . $this->summary;
1104                                                                         }
1105                                                                         $this->undidRev = $undo;
1106                                                                 }
1107                                                                 $this->formtype = 'diff';
1108                                                         }
1109                                                 }
1110                                         } else {
1111                                                 // Failed basic sanity checks.
1112                                                 // Older revisions may have been removed since the link
1113                                                 // was created, or we may simply have got bogus input.
1114                                                 $undoMsg = 'norev';
1115                                         }
1116
1117                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1118                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1119                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1120                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1121                                 }
1122
1123                                 if ( $content === false ) {
1124                                         $content = $this->getOriginalContent( $wgUser );
1125                                 }
1126                         }
1127                 }
1128
1129                 wfProfileOut( __METHOD__ );
1130                 return $content;
1131         }
1132
1133         /**
1134          * Get the content of the wanted revision, without section extraction.
1135          *
1136          * The result of this function can be used to compare user's input with
1137          * section replaced in its context (using WikiPage::replaceSection())
1138          * to the original text of the edit.
1139          *
1140          * This differs from Article::getContent() that when a missing revision is
1141          * encountered the result will be null and not the
1142          * 'missing-revision' message.
1143          *
1144          * @since 1.19
1145          * @param User $user The user to get the revision for
1146          * @return Content|null
1147          */
1148         private function getOriginalContent( User $user ) {
1149                 if ( $this->section == 'new' ) {
1150                         return $this->getCurrentContent();
1151                 }
1152                 $revision = $this->mArticle->getRevisionFetched();
1153                 if ( $revision === null ) {
1154                         if ( !$this->contentModel ) {
1155                                 $this->contentModel = $this->getTitle()->getContentModel();
1156                         }
1157                         $handler = ContentHandler::getForModelID( $this->contentModel );
1158
1159                         return $handler->makeEmptyContent();
1160                 }
1161                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1162                 return $content;
1163         }
1164
1165         /**
1166          * Get the current content of the page. This is basically similar to
1167          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1168          * content object is returned instead of null.
1169          *
1170          * @since 1.21
1171          * @return Content
1172          */
1173         protected function getCurrentContent() {
1174                 $rev = $this->mArticle->getRevision();
1175                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1176
1177                 if ( $content === false || $content === null ) {
1178                         if ( !$this->contentModel ) {
1179                                 $this->contentModel = $this->getTitle()->getContentModel();
1180                         }
1181                         $handler = ContentHandler::getForModelID( $this->contentModel );
1182
1183                         return $handler->makeEmptyContent();
1184                 } else {
1185                         # nasty side-effect, but needed for consistency
1186                         $this->contentModel = $rev->getContentModel();
1187                         $this->contentFormat = $rev->getContentFormat();
1188
1189                         return $content;
1190                 }
1191         }
1192
1193         /**
1194          * Use this method before edit() to preload some text into the edit box
1195          *
1196          * @param string $text
1197          * @deprecated since 1.21, use setPreloadedContent() instead.
1198          */
1199         public function setPreloadedText( $text ) {
1200                 ContentHandler::deprecated( __METHOD__, "1.21" );
1201
1202                 $content = $this->toEditContent( $text );
1203
1204                 $this->setPreloadedContent( $content );
1205         }
1206
1207         /**
1208          * Use this method before edit() to preload some content into the edit box
1209          *
1210          * @param Content $content
1211          *
1212          * @since 1.21
1213          */
1214         public function setPreloadedContent( Content $content ) {
1215                 $this->mPreloadContent = $content;
1216         }
1217
1218         /**
1219          * Get the contents to be preloaded into the box, either set by
1220          * an earlier setPreloadText() or by loading the given page.
1221          *
1222          * @param string $preload representing the title to preload from.
1223          *
1224          * @return string
1225          *
1226          * @deprecated since 1.21, use getPreloadedContent() instead
1227          */
1228         protected function getPreloadedText( $preload ) {
1229                 ContentHandler::deprecated( __METHOD__, "1.21" );
1230
1231                 $content = $this->getPreloadedContent( $preload );
1232                 $text = $this->toEditText( $content );
1233
1234                 return $text;
1235         }
1236
1237         /**
1238          * Get the contents to be preloaded into the box, either set by
1239          * an earlier setPreloadText() or by loading the given page.
1240          *
1241          * @param string $preload Representing the title to preload from.
1242          * @param array $params Parameters to use (interface-message style) in the preloaded text
1243          *
1244          * @return Content
1245          *
1246          * @since 1.21
1247          */
1248         protected function getPreloadedContent( $preload, $params = array() ) {
1249                 global $wgUser;
1250
1251                 if ( !empty( $this->mPreloadContent ) ) {
1252                         return $this->mPreloadContent;
1253                 }
1254
1255                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1256
1257                 if ( $preload === '' ) {
1258                         return $handler->makeEmptyContent();
1259                 }
1260
1261                 $title = Title::newFromText( $preload );
1262                 # Check for existence to avoid getting MediaWiki:Noarticletext
1263                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1264                         //TODO: somehow show a warning to the user!
1265                         return $handler->makeEmptyContent();
1266                 }
1267
1268                 $page = WikiPage::factory( $title );
1269                 if ( $page->isRedirect() ) {
1270                         $title = $page->getRedirectTarget();
1271                         # Same as before
1272                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1273                                 //TODO: somehow show a warning to the user!
1274                                 return $handler->makeEmptyContent();
1275                         }
1276                         $page = WikiPage::factory( $title );
1277                 }
1278
1279                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1280                 $content = $page->getContent( Revision::RAW );
1281
1282                 if ( !$content ) {
1283                         //TODO: somehow show a warning to the user!
1284                         return $handler->makeEmptyContent();
1285                 }
1286
1287                 if ( $content->getModel() !== $handler->getModelID() ) {
1288                         $converted = $content->convert( $handler->getModelID() );
1289
1290                         if ( !$converted ) {
1291                                 //TODO: somehow show a warning to the user!
1292                                 wfDebug( "Attempt to preload incompatible content: "
1293                                                 . "can't convert " . $content->getModel()
1294                                                 . " to " . $handler->getModelID() );
1295
1296                                 return $handler->makeEmptyContent();
1297                         }
1298
1299                         $content = $converted;
1300                 }
1301
1302                 return $content->preloadTransform( $title, $parserOptions, $params );
1303         }
1304
1305         /**
1306          * Make sure the form isn't faking a user's credentials.
1307          *
1308          * @param WebRequest $request
1309          * @return bool
1310          * @private
1311          */
1312         function tokenOk( &$request ) {
1313                 global $wgUser;
1314                 $token = $request->getVal( 'wpEditToken' );
1315                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1316                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1317                 return $this->mTokenOk;
1318         }
1319
1320         /**
1321          * Sets post-edit cookie indicating the user just saved a particular revision.
1322          *
1323          * This uses a temporary cookie for each revision ID so separate saves will never
1324          * interfere with each other.
1325          *
1326          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1327          * the redirect.  It must be clearable by JavaScript code, so it must not be
1328          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1329          * variable.
1330          *
1331          * If the variable were set on the server, it would be cached, which is unwanted
1332          * since the post-edit state should only apply to the load right after the save.
1333          *
1334          * @param $statusValue int The status value (to check for new article status)
1335          */
1336         protected function setPostEditCookie( $statusValue ) {
1337                 $revisionId = $this->mArticle->getLatest();
1338                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1339
1340                 $val = 'saved';
1341                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1342                         $val = 'created';
1343                 } elseif ( $this->oldid ) {
1344                         $val = 'restored';
1345                 }
1346
1347                 $response = RequestContext::getMain()->getRequest()->response();
1348                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1349                         'httpOnly' => false,
1350                 ) );
1351         }
1352
1353         /**
1354          * Attempt submission
1355          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1356          * @return bool false if output is done, true if the rest of the form should be displayed
1357          */
1358         public function attemptSave() {
1359                 global $wgUser;
1360
1361                 $resultDetails = false;
1362                 # Allow bots to exempt some edits from bot flagging
1363                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1364                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1365
1366                 return $this->handleStatus( $status, $resultDetails );
1367         }
1368
1369         /**
1370          * Handle status, such as after attempt save
1371          *
1372          * @param Status $status
1373          * @param array|bool $resultDetails
1374          *
1375          * @throws ErrorPageError
1376          * @return bool false, if output is done, true if rest of the form should be displayed
1377          */
1378         private function handleStatus( Status $status, $resultDetails ) {
1379                 global $wgUser, $wgOut;
1380
1381                 /**
1382                  * @todo FIXME: once the interface for internalAttemptSave() is made
1383                  *   nicer, this should use the message in $status
1384                  */
1385                 if ( $status->value == self::AS_SUCCESS_UPDATE
1386                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1387                 ) {
1388                         $this->didSave = true;
1389                         if ( !$resultDetails['nullEdit'] ) {
1390                                 $this->setPostEditCookie( $status->value );
1391                         }
1392                 }
1393
1394                 switch ( $status->value ) {
1395                         case self::AS_HOOK_ERROR_EXPECTED:
1396                         case self::AS_CONTENT_TOO_BIG:
1397                         case self::AS_ARTICLE_WAS_DELETED:
1398                         case self::AS_CONFLICT_DETECTED:
1399                         case self::AS_SUMMARY_NEEDED:
1400                         case self::AS_TEXTBOX_EMPTY:
1401                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1402                         case self::AS_END:
1403                                 return true;
1404
1405                         case self::AS_HOOK_ERROR:
1406                                 return false;
1407
1408                         case self::AS_PARSE_ERROR:
1409                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1410                                 return true;
1411
1412                         case self::AS_SUCCESS_NEW_ARTICLE:
1413                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1414                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1415                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1416                                 return false;
1417
1418                         case self::AS_SUCCESS_UPDATE:
1419                                 $extraQuery = '';
1420                                 $sectionanchor = $resultDetails['sectionanchor'];
1421
1422                                 // Give extensions a chance to modify URL query on update
1423                                 wfRunHooks(
1424                                         'ArticleUpdateBeforeRedirect',
1425                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1426                                 );
1427
1428                                 if ( $resultDetails['redirect'] ) {
1429                                         if ( $extraQuery == '' ) {
1430                                                 $extraQuery = 'redirect=no';
1431                                         } else {
1432                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1433                                         }
1434                                 }
1435                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1436                                 return false;
1437
1438                         case self::AS_BLANK_ARTICLE:
1439                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1440                                 return false;
1441
1442                         case self::AS_SPAM_ERROR:
1443                                 $this->spamPageWithContent( $resultDetails['spam'] );
1444                                 return false;
1445
1446                         case self::AS_BLOCKED_PAGE_FOR_USER:
1447                                 throw new UserBlockedError( $wgUser->getBlock() );
1448
1449                         case self::AS_IMAGE_REDIRECT_ANON:
1450                         case self::AS_IMAGE_REDIRECT_LOGGED:
1451                                 throw new PermissionsError( 'upload' );
1452
1453                         case self::AS_READ_ONLY_PAGE_ANON:
1454                         case self::AS_READ_ONLY_PAGE_LOGGED:
1455                                 throw new PermissionsError( 'edit' );
1456
1457                         case self::AS_READ_ONLY_PAGE:
1458                                 throw new ReadOnlyError;
1459
1460                         case self::AS_RATE_LIMITED:
1461                                 throw new ThrottledError();
1462
1463                         case self::AS_NO_CREATE_PERMISSION:
1464                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1465                                 throw new PermissionsError( $permission );
1466
1467                         default:
1468                                 // We don't recognize $status->value. The only way that can happen
1469                                 // is if an extension hook aborted from inside ArticleSave.
1470                                 // Render the status object into $this->hookError
1471                                 // FIXME this sucks, we should just use the Status object throughout
1472                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1473                                         '</div>';
1474                                 return true;
1475                 }
1476         }
1477
1478         /**
1479          * Run hooks that can filter edits just before they get saved.
1480          *
1481          * @param Content $content The Content to filter.
1482          * @param Status $status For reporting the outcome to the caller
1483          * @param User $user The user performing the edit
1484          *
1485          * @return bool
1486          */
1487         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1488                 // Run old style post-section-merge edit filter
1489                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1490                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1491
1492                         # Error messages etc. could be handled within the hook...
1493                         $status->fatal( 'hookaborted' );
1494                         $status->value = self::AS_HOOK_ERROR;
1495                         return false;
1496                 } elseif ( $this->hookError != '' ) {
1497                         # ...or the hook could be expecting us to produce an error
1498                         $status->fatal( 'hookaborted' );
1499                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1500                         return false;
1501                 }
1502
1503                 // Run new style post-section-merge edit filter
1504                 if ( !wfRunHooks( 'EditFilterMergedContent',
1505                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1506                                 $user, $this->minoredit ) ) ) {
1507
1508                         # Error messages etc. could be handled within the hook...
1509                         // XXX: $status->value may already be something informative...
1510                         $this->hookError = $status->getWikiText();
1511                         $status->fatal( 'hookaborted' );
1512                         $status->value = self::AS_HOOK_ERROR;
1513                         return false;
1514                 } elseif ( !$status->isOK() ) {
1515                         # ...or the hook could be expecting us to produce an error
1516                         // FIXME this sucks, we should just use the Status object throughout
1517                         $this->hookError = $status->getWikiText();
1518                         $status->fatal( 'hookaborted' );
1519                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1520                         return false;
1521                 }
1522
1523                 return true;
1524         }
1525
1526         /**
1527          * Attempt submission (no UI)
1528          *
1529          * @param array $result Array to add statuses to, currently with the
1530          *   possible keys:
1531          *   - spam (string): Spam string from content if any spam is detected by
1532          *     matchSpamRegex.
1533          *   - sectionanchor (string): Section anchor for a section save.
1534          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1535          *     false otherwise.
1536          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1537          *     revision is a redirect.
1538          * @param bool $bot True if edit is being made under the bot right.
1539          *
1540          * @return Status Status object, possibly with a message, but always with
1541          *   one of the AS_* constants in $status->value,
1542          *
1543          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1544          *   various error display idiosyncrasies. There are also lots of cases
1545          *   where error metadata is set in the object and retrieved later instead
1546          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1547          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1548          * time.
1549          */
1550         function internalAttemptSave( &$result, $bot = false ) {
1551                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1552
1553                 $status = Status::newGood();
1554
1555                 wfProfileIn( __METHOD__ );
1556                 wfProfileIn( __METHOD__ . '-checks' );
1557
1558                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1559                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1560                         $status->fatal( 'hookaborted' );
1561                         $status->value = self::AS_HOOK_ERROR;
1562                         wfProfileOut( __METHOD__ . '-checks' );
1563                         wfProfileOut( __METHOD__ );
1564                         return $status;
1565                 }
1566
1567                 $spam = $wgRequest->getText( 'wpAntispam' );
1568                 if ( $spam !== '' ) {
1569                         wfDebugLog(
1570                                 'SimpleAntiSpam',
1571                                 $wgUser->getName() .
1572                                 ' editing "' .
1573                                 $this->mTitle->getPrefixedText() .
1574                                 '" submitted bogus field "' .
1575                                 $spam .
1576                                 '"'
1577                         );
1578                         $status->fatal( 'spamprotectionmatch', false );
1579                         $status->value = self::AS_SPAM_ERROR;
1580                         wfProfileOut( __METHOD__ . '-checks' );
1581                         wfProfileOut( __METHOD__ );
1582                         return $status;
1583                 }
1584
1585                 try {
1586                         # Construct Content object
1587                         $textbox_content = $this->toEditContent( $this->textbox1 );
1588                 } catch ( MWContentSerializationException $ex ) {
1589                         $status->fatal(
1590                                 'content-failed-to-parse',
1591                                 $this->contentModel,
1592                                 $this->contentFormat,
1593                                 $ex->getMessage()
1594                         );
1595                         $status->value = self::AS_PARSE_ERROR;
1596                         wfProfileOut( __METHOD__ . '-checks' );
1597                         wfProfileOut( __METHOD__ );
1598                         return $status;
1599                 }
1600
1601                 # Check image redirect
1602                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1603                         $textbox_content->isRedirect() &&
1604                         !$wgUser->isAllowed( 'upload' )
1605                 ) {
1606                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1607                                 $status->setResult( false, $code );
1608
1609                                 wfProfileOut( __METHOD__ . '-checks' );
1610                                 wfProfileOut( __METHOD__ );
1611
1612                                 return $status;
1613                 }
1614
1615                 # Check for spam
1616                 $match = self::matchSummarySpamRegex( $this->summary );
1617                 if ( $match === false && $this->section == 'new' ) {
1618                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1619                         # regular summaries, it is added to the actual wikitext.
1620                         if ( $this->sectiontitle !== '' ) {
1621                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1622                                 $match = self::matchSpamRegex( $this->sectiontitle );
1623                         } else {
1624                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1625                                 # is used with the 'summary' parameter.
1626                                 $match = self::matchSpamRegex( $this->summary );
1627                         }
1628                 }
1629                 if ( $match === false ) {
1630                         $match = self::matchSpamRegex( $this->textbox1 );
1631                 }
1632                 if ( $match !== false ) {
1633                         $result['spam'] = $match;
1634                         $ip = $wgRequest->getIP();
1635                         $pdbk = $this->mTitle->getPrefixedDBkey();
1636                         $match = str_replace( "\n", '', $match );
1637                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1638                         $status->fatal( 'spamprotectionmatch', $match );
1639                         $status->value = self::AS_SPAM_ERROR;
1640                         wfProfileOut( __METHOD__ . '-checks' );
1641                         wfProfileOut( __METHOD__ );
1642                         return $status;
1643                 }
1644                 if ( !wfRunHooks(
1645                         'EditFilter',
1646                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1647                 ) {
1648                         # Error messages etc. could be handled within the hook...
1649                         $status->fatal( 'hookaborted' );
1650                         $status->value = self::AS_HOOK_ERROR;
1651                         wfProfileOut( __METHOD__ . '-checks' );
1652                         wfProfileOut( __METHOD__ );
1653                         return $status;
1654                 } elseif ( $this->hookError != '' ) {
1655                         # ...or the hook could be expecting us to produce an error
1656                         $status->fatal( 'hookaborted' );
1657                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1658                         wfProfileOut( __METHOD__ . '-checks' );
1659                         wfProfileOut( __METHOD__ );
1660                         return $status;
1661                 }
1662
1663                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1664                         // Auto-block user's IP if the account was "hard" blocked
1665                         $wgUser->spreadAnyEditBlock();
1666                         # Check block state against master, thus 'false'.
1667                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1668                         wfProfileOut( __METHOD__ . '-checks' );
1669                         wfProfileOut( __METHOD__ );
1670                         return $status;
1671                 }
1672
1673                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1674                 if ( $this->kblength > $wgMaxArticleSize ) {
1675                         // Error will be displayed by showEditForm()
1676                         $this->tooBig = true;
1677                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1678                         wfProfileOut( __METHOD__ . '-checks' );
1679                         wfProfileOut( __METHOD__ );
1680                         return $status;
1681                 }
1682
1683                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1684                         if ( $wgUser->isAnon() ) {
1685                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1686                                 wfProfileOut( __METHOD__ . '-checks' );
1687                                 wfProfileOut( __METHOD__ );
1688                                 return $status;
1689                         } else {
1690                                 $status->fatal( 'readonlytext' );
1691                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1692                                 wfProfileOut( __METHOD__ . '-checks' );
1693                                 wfProfileOut( __METHOD__ );
1694                                 return $status;
1695                         }
1696                 }
1697
1698                 if ( wfReadOnly() ) {
1699                         $status->fatal( 'readonlytext' );
1700                         $status->value = self::AS_READ_ONLY_PAGE;
1701                         wfProfileOut( __METHOD__ . '-checks' );
1702                         wfProfileOut( __METHOD__ );
1703                         return $status;
1704                 }
1705                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1706                         $status->fatal( 'actionthrottledtext' );
1707                         $status->value = self::AS_RATE_LIMITED;
1708                         wfProfileOut( __METHOD__ . '-checks' );
1709                         wfProfileOut( __METHOD__ );
1710                         return $status;
1711                 }
1712
1713                 # If the article has been deleted while editing, don't save it without
1714                 # confirmation
1715                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1716                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1717                         wfProfileOut( __METHOD__ . '-checks' );
1718                         wfProfileOut( __METHOD__ );
1719                         return $status;
1720                 }
1721
1722                 wfProfileOut( __METHOD__ . '-checks' );
1723
1724                 # Load the page data from the master. If anything changes in the meantime,
1725                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1726                 $this->mArticle->loadPageData( 'fromdbmaster' );
1727                 $new = !$this->mArticle->exists();
1728
1729                 if ( $new ) {
1730                         // Late check for create permission, just in case *PARANOIA*
1731                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1732                                 $status->fatal( 'nocreatetext' );
1733                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1734                                 wfDebug( __METHOD__ . ": no create permission\n" );
1735                                 wfProfileOut( __METHOD__ );
1736                                 return $status;
1737                         }
1738
1739                         // Don't save a new page if it's blank or if it's a MediaWiki:
1740                         // message with content equivalent to default (allow empty pages
1741                         // in this case to disable messages, see bug 50124)
1742                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1743                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1744                                 $defaultText = $defaultMessageText;
1745                         } else {
1746                                 $defaultText = '';
1747                         }
1748
1749                         if ( $this->textbox1 === $defaultText ) {
1750                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1751                                 wfProfileOut( __METHOD__ );
1752                                 return $status;
1753                         }
1754
1755                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1756                                 wfProfileOut( __METHOD__ );
1757                                 return $status;
1758                         }
1759
1760                         $content = $textbox_content;
1761
1762                         $result['sectionanchor'] = '';
1763                         if ( $this->section == 'new' ) {
1764                                 if ( $this->sectiontitle !== '' ) {
1765                                         // Insert the section title above the content.
1766                                         $content = $content->addSectionHeader( $this->sectiontitle );
1767
1768                                         // Jump to the new section
1769                                         $result['sectionanchor'] =
1770                                                 $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1771
1772                                         // If no edit summary was specified, create one automatically from the section
1773                                         // title and have it link to the new section. Otherwise, respect the summary as
1774                                         // passed.
1775                                         if ( $this->summary === '' ) {
1776                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1777                                                 $this->summary = wfMessage( 'newsectionsummary' )
1778                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1779                                         }
1780                                 } elseif ( $this->summary !== '' ) {
1781                                         // Insert the section title above the content.
1782                                         $content = $content->addSectionHeader( $this->summary );
1783
1784                                         // Jump to the new section
1785                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1786
1787                                         // Create a link to the new section from the edit summary.
1788                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1789                                         $this->summary = wfMessage( 'newsectionsummary' )
1790                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1791                                 }
1792                         }
1793
1794                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1795
1796                 } else { # not $new
1797
1798                         # Article exists. Check for edit conflict.
1799
1800                         $this->mArticle->clear(); # Force reload of dates, etc.
1801                         $timestamp = $this->mArticle->getTimestamp();
1802
1803                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1804
1805                         if ( $timestamp != $this->edittime ) {
1806                                 $this->isConflict = true;
1807                                 if ( $this->section == 'new' ) {
1808                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1809                                                 $this->mArticle->getComment() == $this->summary ) {
1810                                                 // Probably a duplicate submission of a new comment.
1811                                                 // This can happen when squid resends a request after
1812                                                 // a timeout but the first one actually went through.
1813                                                 wfDebug( __METHOD__
1814                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1815                                         } else {
1816                                                 // New comment; suppress conflict.
1817                                                 $this->isConflict = false;
1818                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1819                                         }
1820                                 } elseif ( $this->section == ''
1821                                         && Revision::userWasLastToEdit(
1822                                                 DB_MASTER, $this->mTitle->getArticleID(),
1823                                                 $wgUser->getId(), $this->edittime
1824                                         )
1825                                 ) {
1826                                         # Suppress edit conflict with self, except for section edits where merging is required.
1827                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1828                                         $this->isConflict = false;
1829                                 }
1830                         }
1831
1832                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1833                         if ( $this->sectiontitle !== '' ) {
1834                                 $sectionTitle = $this->sectiontitle;
1835                         } else {
1836                                 $sectionTitle = $this->summary;
1837                         }
1838
1839                         $content = null;
1840
1841                         if ( $this->isConflict ) {
1842                                 wfDebug( __METHOD__
1843                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1844                                         . " (article time '{$timestamp}')\n" );
1845
1846                                 $content = $this->mArticle->replaceSectionContent(
1847                                         $this->section,
1848                                         $textbox_content,
1849                                         $sectionTitle,
1850                                         $this->edittime
1851                                 );
1852                         } else {
1853                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1854                                 $content = $this->mArticle->replaceSectionContent(
1855                                         $this->section,
1856                                         $textbox_content,
1857                                         $sectionTitle
1858                                 );
1859                         }
1860
1861                         if ( is_null( $content ) ) {
1862                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1863                                 $this->isConflict = true;
1864                                 $content = $textbox_content; // do not try to merge here!
1865                         } elseif ( $this->isConflict ) {
1866                                 # Attempt merge
1867                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1868                                         // Successful merge! Maybe we should tell the user the good news?
1869                                         $this->isConflict = false;
1870                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1871                                 } else {
1872                                         $this->section = '';
1873                                         $this->textbox1 = ContentHandler::getContentText( $content );
1874                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1875                                 }
1876                         }
1877
1878                         if ( $this->isConflict ) {
1879                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1880                                 wfProfileOut( __METHOD__ );
1881                                 return $status;
1882                         }
1883
1884                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1885                                 wfProfileOut( __METHOD__ );
1886                                 return $status;
1887                         }
1888
1889                         if ( $this->section == 'new' ) {
1890                                 // Handle the user preference to force summaries here
1891                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1892                                         $this->missingSummary = true;
1893                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1894                                         $status->value = self::AS_SUMMARY_NEEDED;
1895                                         wfProfileOut( __METHOD__ );
1896                                         return $status;
1897                                 }
1898
1899                                 // Do not allow the user to post an empty comment
1900                                 if ( $this->textbox1 == '' ) {
1901                                         $this->missingComment = true;
1902                                         $status->fatal( 'missingcommenttext' );
1903                                         $status->value = self::AS_TEXTBOX_EMPTY;
1904                                         wfProfileOut( __METHOD__ );
1905                                         return $status;
1906                                 }
1907                         } elseif ( !$this->allowBlankSummary
1908                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1909                                 && !$content->isRedirect()
1910                                 && md5( $this->summary ) == $this->autoSumm
1911                         ) {
1912                                 $this->missingSummary = true;
1913                                 $status->fatal( 'missingsummary' );
1914                                 $status->value = self::AS_SUMMARY_NEEDED;
1915                                 wfProfileOut( __METHOD__ );
1916                                 return $status;
1917                         }
1918
1919                         # All's well
1920                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1921                         $sectionanchor = '';
1922                         if ( $this->section == 'new' ) {
1923                                 if ( $this->sectiontitle !== '' ) {
1924                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1925                                         // If no edit summary was specified, create one automatically from the section
1926                                         // title and have it link to the new section. Otherwise, respect the summary as
1927                                         // passed.
1928                                         if ( $this->summary === '' ) {
1929                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1930                                                 $this->summary = wfMessage( 'newsectionsummary' )
1931                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1932                                         }
1933                                 } elseif ( $this->summary !== '' ) {
1934                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1935                                         # This is a new section, so create a link to the new section
1936                                         # in the revision summary.
1937                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1938                                         $this->summary = wfMessage( 'newsectionsummary' )
1939                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1940                                 }
1941                         } elseif ( $this->section != '' ) {
1942                                 # Try to get a section anchor from the section source, redirect
1943                                 # to edited section if header found.
1944                                 # XXX: Might be better to integrate this into Article::replaceSection
1945                                 # for duplicate heading checking and maybe parsing.
1946                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1947                                 # We can't deal with anchors, includes, html etc in the header for now,
1948                                 # headline would need to be parsed to improve this.
1949                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1950                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1951                                 }
1952                         }
1953                         $result['sectionanchor'] = $sectionanchor;
1954                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1955
1956                         // Save errors may fall down to the edit form, but we've now
1957                         // merged the section into full text. Clear the section field
1958                         // so that later submission of conflict forms won't try to
1959                         // replace that into a duplicated mess.
1960                         $this->textbox1 = $this->toEditText( $content );
1961                         $this->section = '';
1962
1963                         $status->value = self::AS_SUCCESS_UPDATE;
1964                 }
1965
1966                 // Check for length errors again now that the section is merged in
1967                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1968                 if ( $this->kblength > $wgMaxArticleSize ) {
1969                         $this->tooBig = true;
1970                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1971                         wfProfileOut( __METHOD__ );
1972                         return $status;
1973                 }
1974
1975                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1976                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1977                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1978                         ( $bot ? EDIT_FORCE_BOT : 0 );
1979
1980                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1981                                                                                                                 false, null, $this->contentFormat );
1982
1983                 if ( !$doEditStatus->isOK() ) {
1984                         // Failure from doEdit()
1985                         // Show the edit conflict page for certain recognized errors from doEdit(),
1986                         // but don't show it for errors from extension hooks
1987                         $errors = $doEditStatus->getErrorsArray();
1988                         if ( in_array( $errors[0][0],
1989                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1990                         ) {
1991                                 $this->isConflict = true;
1992                                 // Destroys data doEdit() put in $status->value but who cares
1993                                 $doEditStatus->value = self::AS_END;
1994                         }
1995                         wfProfileOut( __METHOD__ );
1996                         return $doEditStatus;
1997                 }
1998
1999                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2000                 if ( $result['nullEdit'] ) {
2001                         // We don't know if it was a null edit until now, so increment here
2002                         $wgUser->pingLimiter( 'linkpurge' );
2003                 }
2004                 $result['redirect'] = $content->isRedirect();
2005                 $this->updateWatchlist();
2006                 wfProfileOut( __METHOD__ );
2007                 return $status;
2008         }
2009
2010         /**
2011          * Register the change of watch status
2012          */
2013         protected function updateWatchlist() {
2014                 global $wgUser;
2015
2016                 if ( $wgUser->isLoggedIn()
2017                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
2018                 ) {
2019                         $fname = __METHOD__;
2020                         $title = $this->mTitle;
2021                         $watch = $this->watchthis;
2022
2023                         // Do this in its own transaction to reduce contention...
2024                         $dbw = wfGetDB( DB_MASTER );
2025                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
2026                                 $dbw->begin( $fname );
2027                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
2028                                 $dbw->commit( $fname );
2029                         } );
2030                 }
2031         }
2032
2033         /**
2034          * Attempts to merge text content with base and current revisions
2035          *
2036          * @param string $editText
2037          *
2038          * @return bool
2039          * @deprecated since 1.21, use mergeChangesIntoContent() instead
2040          */
2041         function mergeChangesInto( &$editText ) {
2042                 ContentHandler::deprecated( __METHOD__, "1.21" );
2043
2044                 $editContent = $this->toEditContent( $editText );
2045
2046                 $ok = $this->mergeChangesIntoContent( $editContent );
2047
2048                 if ( $ok ) {
2049                         $editText = $this->toEditText( $editContent );
2050                         return true;
2051                 }
2052                 return false;
2053         }
2054
2055         /**
2056          * Attempts to do 3-way merge of edit content with a base revision
2057          * and current content, in case of edit conflict, in whichever way appropriate
2058          * for the content type.
2059          *
2060          * @since 1.21
2061          *
2062          * @param Content $editContent
2063          *
2064          * @return bool
2065          */
2066         private function mergeChangesIntoContent( &$editContent ) {
2067                 wfProfileIn( __METHOD__ );
2068
2069                 $db = wfGetDB( DB_MASTER );
2070
2071                 // This is the revision the editor started from
2072                 $baseRevision = $this->getBaseRevision();
2073                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2074
2075                 if ( is_null( $baseContent ) ) {
2076                         wfProfileOut( __METHOD__ );
2077                         return false;
2078                 }
2079
2080                 // The current state, we want to merge updates into it
2081                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2082                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2083
2084                 if ( is_null( $currentContent ) ) {
2085                         wfProfileOut( __METHOD__ );
2086                         return false;
2087                 }
2088
2089                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2090
2091                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2092
2093                 if ( $result ) {
2094                         $editContent = $result;
2095                         wfProfileOut( __METHOD__ );
2096                         return true;
2097                 }
2098
2099                 wfProfileOut( __METHOD__ );
2100                 return false;
2101         }
2102
2103         /**
2104          * @return Revision
2105          */
2106         function getBaseRevision() {
2107                 if ( !$this->mBaseRevision ) {
2108                         $db = wfGetDB( DB_MASTER );
2109                         $this->mBaseRevision = Revision::loadFromTimestamp(
2110                                 $db, $this->mTitle, $this->edittime );
2111                 }
2112                 return $this->mBaseRevision;
2113         }
2114
2115         /**
2116          * Check given input text against $wgSpamRegex, and return the text of the first match.
2117          *
2118          * @param string $text
2119          *
2120          * @return string|bool Matching string or false
2121          */
2122         public static function matchSpamRegex( $text ) {
2123                 global $wgSpamRegex;
2124                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2125                 $regexes = (array)$wgSpamRegex;
2126                 return self::matchSpamRegexInternal( $text, $regexes );
2127         }
2128
2129         /**
2130          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2131          *
2132          * @param string $text
2133          *
2134          * @return string|bool Matching string or false
2135          */
2136         public static function matchSummarySpamRegex( $text ) {
2137                 global $wgSummarySpamRegex;
2138                 $regexes = (array)$wgSummarySpamRegex;
2139                 return self::matchSpamRegexInternal( $text, $regexes );
2140         }
2141
2142         /**
2143          * @param string $text
2144          * @param array $regexes
2145          * @return bool|string
2146          */
2147         protected static function matchSpamRegexInternal( $text, $regexes ) {
2148                 foreach ( $regexes as $regex ) {
2149                         $matches = array();
2150                         if ( preg_match( $regex, $text, $matches ) ) {
2151                                 return $matches[0];
2152                         }
2153                 }
2154                 return false;
2155         }
2156
2157         function setHeaders() {
2158                 global $wgOut, $wgUser;
2159
2160                 $wgOut->addModules( 'mediawiki.action.edit' );
2161                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2162
2163                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2164                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2165                 }
2166
2167                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2168                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2169                 }
2170
2171                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2172
2173                 # Enabled article-related sidebar, toplinks, etc.
2174                 $wgOut->setArticleRelated( true );
2175
2176                 $contextTitle = $this->getContextTitle();
2177                 if ( $this->isConflict ) {
2178                         $msg = 'editconflict';
2179                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2180                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2181                 } else {
2182                         $msg = $contextTitle->exists()
2183                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2184                                         && $contextTitle->getDefaultMessageText() !== false
2185                                 )
2186                                 ? 'editing'
2187                                 : 'creating';
2188                 }
2189
2190                 # Use the title defined by DISPLAYTITLE magic word when present
2191                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2192                 if ( $displayTitle === false ) {
2193                         $displayTitle = $contextTitle->getPrefixedText();
2194                 }
2195                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2196         }
2197
2198         /**
2199          * Show all applicable editing introductions
2200          */
2201         protected function showIntro() {
2202                 global $wgOut, $wgUser;
2203                 if ( $this->suppressIntro ) {
2204                         return;
2205                 }
2206
2207                 $namespace = $this->mTitle->getNamespace();
2208
2209                 if ( $namespace == NS_MEDIAWIKI ) {
2210                         # Show a warning if editing an interface message
2211                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2212                 } elseif ( $namespace == NS_FILE ) {
2213                         # Show a hint to shared repo
2214                         $file = wfFindFile( $this->mTitle );
2215                         if ( $file && !$file->isLocal() ) {
2216                                 $descUrl = $file->getDescriptionUrl();
2217                                 # there must be a description url to show a hint to shared repo
2218                                 if ( $descUrl ) {
2219                                         if ( !$this->mTitle->exists() ) {
2220                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2221                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2222                                                 ) );
2223                                         } else {
2224                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2225                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2226                                                 ) );
2227                                         }
2228                                 }
2229                         }
2230                 }
2231
2232                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2233                 # Show log extract when the user is currently blocked
2234                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2235                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2236                         $username = $parts[0];
2237                         $user = User::newFromName( $username, false /* allow IP users*/ );
2238                         $ip = User::isIP( $username );
2239                         $block = Block::newFromTarget( $user, $user );
2240                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2241                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2242                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2243                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) { # Show log extract if the user is currently blocked
2244                                 LogEventsList::showLogExtract(
2245                                         $wgOut,
2246                                         'block',
2247                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2248                                         '',
2249                                         array(
2250                                                 'lim' => 1,
2251                                                 'showIfEmpty' => false,
2252                                                 'msgKey' => array(
2253                                                         'blocked-notice-logextract',
2254                                                         $user->getName() # Support GENDER in notice
2255                                                 )
2256                                         )
2257                                 );
2258                         }
2259                 }
2260                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2261                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2262                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2263                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2264                         ) );
2265                         if ( $wgUser->isLoggedIn() ) {
2266                                 $wgOut->wrapWikiMsg(
2267                                         // Suppress the external link icon, consider the help url an internal one
2268                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2269                                         array(
2270                                                 'newarticletext',
2271                                                 $helpLink
2272                                         )
2273                                 );
2274                         } else {
2275                                 $wgOut->wrapWikiMsg(
2276                                         // Suppress the external link icon, consider the help url an internal one
2277                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2278                                         array(
2279                                                 'newarticletextanon',
2280                                                 $helpLink
2281                                         )
2282                                 );
2283                         }
2284                 }
2285                 # Give a notice if the user is editing a deleted/moved page...
2286                 if ( !$this->mTitle->exists() ) {
2287                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2288                                 '',
2289                                 array(
2290                                         'lim' => 10,
2291                                         'conds' => array( "log_action != 'revision'" ),
2292                                         'showIfEmpty' => false,
2293                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2294                                 )
2295                         );
2296                 }
2297         }
2298
2299         /**
2300          * Attempt to show a custom editing introduction, if supplied
2301          *
2302          * @return bool
2303          */
2304         protected function showCustomIntro() {
2305                 if ( $this->editintro ) {
2306                         $title = Title::newFromText( $this->editintro );
2307                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2308                                 global $wgOut;
2309                                 // Added using template syntax, to take <noinclude>'s into account.
2310                                 $wgOut->addWikiTextTitleTidy( '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>', $this->mTitle );
2311                                 return true;
2312                         }
2313                 }
2314                 return false;
2315         }
2316
2317         /**
2318          * Gets an editable textual representation of $content.
2319          * The textual representation can be turned by into a Content object by the
2320          * toEditContent() method.
2321          *
2322          * If $content is null or false or a string, $content is returned unchanged.
2323          *
2324          * If the given Content object is not of a type that can be edited using
2325          * the text base EditPage, an exception will be raised. Set
2326          * $this->allowNonTextContent to true to allow editing of non-textual
2327          * content.
2328          *
2329          * @param Content|null|bool|string $content
2330          * @return string The editable text form of the content.
2331          *
2332          * @throws MWException if $content is not an instance of TextContent and
2333          *   $this->allowNonTextContent is not true.
2334          */
2335         protected function toEditText( $content ) {
2336                 if ( $content === null || $content === false ) {
2337                         return $content;
2338                 }
2339
2340                 if ( is_string( $content ) ) {
2341                         return $content;
2342                 }
2343
2344                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2345                         throw new MWException( 'This content model is not supported: '
2346                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2347                 }
2348
2349                 return $content->serialize( $this->contentFormat );
2350         }
2351
2352         /**
2353          * Turns the given text into a Content object by unserializing it.
2354          *
2355          * If the resulting Content object is not of a type that can be edited using
2356          * the text base EditPage, an exception will be raised. Set
2357          * $this->allowNonTextContent to true to allow editing of non-textual
2358          * content.
2359          *
2360          * @param string|null|bool $text Text to unserialize
2361          * @return Content The content object created from $text. If $text was false
2362          *   or null, false resp. null will be  returned instead.
2363          *
2364          * @throws MWException if unserializing the text results in a Content
2365          *   object that is not an instance of TextContent and
2366          *   $this->allowNonTextContent is not true.
2367          */
2368         protected function toEditContent( $text ) {
2369                 if ( $text === false || $text === null ) {
2370                         return $text;
2371                 }
2372
2373                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2374                         $this->contentModel, $this->contentFormat );
2375
2376                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2377                         throw new MWException( 'This content model is not supported: '
2378                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2379                 }
2380
2381                 return $content;
2382         }
2383
2384         /**
2385          * Send the edit form and related headers to $wgOut
2386          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2387          *     during form output near the top, for captchas and the like.
2388          */
2389         function showEditForm( $formCallback = null ) {
2390                 global $wgOut, $wgUser;
2391
2392                 wfProfileIn( __METHOD__ );
2393
2394                 # need to parse the preview early so that we know which templates are used,
2395                 # otherwise users with "show preview after edit box" will get a blank list
2396                 # we parse this near the beginning so that setHeaders can do the title
2397                 # setting work instead of leaving it in getPreviewText
2398                 $previewOutput = '';
2399                 if ( $this->formtype == 'preview' ) {
2400                         $previewOutput = $this->getPreviewText();
2401                 }
2402
2403                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2404
2405                 $this->setHeaders();
2406
2407                 if ( $this->showHeader() === false ) {
2408                         wfProfileOut( __METHOD__ );
2409                         return;
2410                 }
2411
2412                 $wgOut->addHTML( $this->editFormPageTop );
2413
2414                 if ( $wgUser->getOption( 'previewontop' ) ) {
2415                         $this->displayPreviewArea( $previewOutput, true );
2416                 }
2417
2418                 $wgOut->addHTML( $this->editFormTextTop );
2419
2420                 $showToolbar = true;
2421                 if ( $this->wasDeletedSinceLastEdit() ) {
2422                         if ( $this->formtype == 'save' ) {
2423                                 // Hide the toolbar and edit area, user can click preview to get it back
2424                                 // Add an confirmation checkbox and explanation.
2425                                 $showToolbar = false;
2426                         } else {
2427                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2428                                         'deletedwhileediting' );
2429                         }
2430                 }
2431
2432                 // @todo add EditForm plugin interface and use it here!
2433                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2434                 $wgOut->addHTML( Html::openElement(
2435                         'form',
2436                         array(
2437                                 'id' => self::EDITFORM_ID,
2438                                 'name' => self::EDITFORM_ID,
2439                                 'method' => 'post',
2440                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2441                                 'enctype' => 'multipart/form-data'
2442                         )
2443                 ) );
2444
2445                 if ( is_callable( $formCallback ) ) {
2446                         call_user_func_array( $formCallback, array( &$wgOut ) );
2447                 }
2448
2449                 // Add an empty field to trip up spambots
2450                 $wgOut->addHTML(
2451                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2452                         . Html::rawElement(
2453                                 'label',
2454                                 array( 'for' => 'wpAntiSpam' ),
2455                                 wfMessage( 'simpleantispam-label' )->parse()
2456                         )
2457                         . Xml::element(
2458                                 'input',
2459                                 array(
2460                                         'type' => 'text',
2461                                         'name' => 'wpAntispam',
2462                                         'id' => 'wpAntispam',
2463                                         'value' => ''
2464                                 )
2465                         )
2466                         . Xml::closeElement( 'div' )
2467                 );
2468
2469                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2470
2471                 // Put these up at the top to ensure they aren't lost on early form submission
2472                 $this->showFormBeforeText();
2473
2474                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2475                         $username = $this->lastDelete->user_name;
2476                         $comment = $this->lastDelete->log_comment;
2477
2478                         // It is better to not parse the comment at all than to have templates expanded in the middle
2479                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2480                         $key = $comment === ''
2481                                 ? 'confirmrecreate-noreason'
2482                                 : 'confirmrecreate';
2483                         $wgOut->addHTML(
2484                                 '<div class="mw-confirm-recreate">' .
2485                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2486                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2487                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2488                                 ) .
2489                                 '</div>'
2490                         );
2491                 }
2492
2493                 # When the summary is hidden, also hide them on preview/show changes
2494                 if ( $this->nosummary ) {
2495                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2496                 }
2497
2498                 # If a blank edit summary was previously provided, and the appropriate
2499                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2500                 # user being bounced back more than once in the event that a summary
2501                 # is not required.
2502                 #####
2503                 # For a bit more sophisticated detection of blank summaries, hash the
2504                 # automatic one and pass that in the hidden field wpAutoSummary.
2505                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2506                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2507                 }
2508
2509                 if ( $this->undidRev ) {
2510                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2511                 }
2512
2513                 if ( $this->hasPresetSummary ) {
2514                         // If a summary has been preset using &summary= we don't want to prompt for
2515                         // a different summary. Only prompt for a summary if the summary is blanked.
2516                         // (Bug 17416)
2517                         $this->autoSumm = md5( '' );
2518                 }
2519
2520                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2521                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2522
2523                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2524
2525                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2526                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2527
2528                 if ( $this->section == 'new' ) {
2529                         $this->showSummaryInput( true, $this->summary );
2530                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2531                 }
2532
2533                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2534
2535                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2536                         $wgOut->addHTML( EditPage::getEditToolbar() );
2537                 }
2538
2539                 if ( $this->isConflict ) {
2540                         // In an edit conflict bypass the overridable content form method
2541                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2542                         // resolved between page source edits and custom ui edits using the
2543                         // custom edit ui.
2544                         $this->textbox2 = $this->textbox1;
2545
2546                         $content = $this->getCurrentContent();
2547                         $this->textbox1 = $this->toEditText( $content );
2548
2549                         $this->showTextbox1();
2550                 } else {
2551                         $this->showContentForm();
2552                 }
2553
2554                 $wgOut->addHTML( $this->editFormTextAfterContent );
2555
2556                 $this->showStandardInputs();
2557
2558                 $this->showFormAfterText();
2559
2560                 $this->showTosSummary();
2561
2562                 $this->showEditTools();
2563
2564                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2565
2566                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2567                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2568
2569                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2570                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2571
2572                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2573                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2574
2575                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2576
2577                 if ( $this->isConflict ) {
2578                         try {
2579                                 $this->showConflict();
2580                         } catch ( MWContentSerializationException $ex ) {
2581                                 // this can't really happen, but be nice if it does.
2582                                 $msg = wfMessage(
2583                                         'content-failed-to-parse',
2584                                         $this->contentModel,
2585                                         $this->contentFormat,
2586                                         $ex->getMessage()
2587                                 );
2588                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2589                         }
2590                 }
2591
2592                 // Marker for detecting truncated form data.  This must be the last
2593                 // parameter sent in order to be of use, so do not move me.
2594                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2595                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2596
2597                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2598                         $this->displayPreviewArea( $previewOutput, false );
2599                 }
2600
2601                 wfProfileOut( __METHOD__ );
2602         }
2603
2604         /**
2605          * Extract the section title from current section text, if any.
2606          *
2607          * @param string $text
2608          * @return string|bool string or false
2609          */
2610         public static function extractSectionTitle( $text ) {
2611                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2612                 if ( !empty( $matches[2] ) ) {
2613                         global $wgParser;
2614                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2615                 } else {
2616                         return false;
2617                 }
2618         }
2619
2620         /**
2621          * @return bool
2622          */
2623         protected function showHeader() {
2624                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2625                 global $wgAllowUserCss, $wgAllowUserJs;
2626
2627                 if ( $this->mTitle->isTalkPage() ) {
2628                         $wgOut->addWikiMsg( 'talkpagetext' );
2629                 }
2630
2631                 // Add edit notices
2632                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2633
2634                 if ( $this->isConflict ) {
2635                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2636                         $this->edittime = $this->mArticle->getTimestamp();
2637                 } else {
2638                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2639                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2640                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2641                                 // Someone is welcome to try refactoring though
2642                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2643                                 return false;
2644                         }
2645
2646                         if ( $this->section != '' && $this->section != 'new' ) {
2647                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2648                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2649                                         if ( $sectionTitle !== false ) {
2650                                                 $this->summary = "/* $sectionTitle */ ";
2651                                         }
2652                                 }
2653                         }
2654
2655                         if ( $this->missingComment ) {
2656                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2657                         }
2658
2659                         if ( $this->missingSummary && $this->section != 'new' ) {
2660                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2661                         }
2662
2663                         if ( $this->missingSummary && $this->section == 'new' ) {
2664                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2665                         }
2666
2667                         if ( $this->hookError !== '' ) {
2668                                 $wgOut->addWikiText( $this->hookError );
2669                         }
2670
2671                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2672                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2673                         }
2674
2675                         if ( $this->section != 'new' ) {
2676                                 $revision = $this->mArticle->getRevisionFetched();
2677                                 if ( $revision ) {
2678                                         // Let sysop know that this will make private content public if saved
2679
2680                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2681                                                 $wgOut->wrapWikiMsg(
2682                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2683                                                         'rev-deleted-text-permission'
2684                                                 );
2685                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2686                                                 $wgOut->wrapWikiMsg(
2687                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2688                                                         'rev-deleted-text-view'
2689                                                 );
2690                                         }
2691
2692                                         if ( !$revision->isCurrent() ) {
2693                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2694                                                 $wgOut->addWikiMsg( 'editingold' );
2695                                         }
2696                                 } elseif ( $this->mTitle->exists() ) {
2697                                         // Something went wrong
2698
2699                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2700                                                 array( 'missing-revision', $this->oldid ) );
2701                                 }
2702                         }
2703                 }
2704
2705                 if ( wfReadOnly() ) {
2706                         $wgOut->wrapWikiMsg(
2707                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2708                                 array( 'readonlywarning', wfReadOnlyReason() )
2709                         );
2710                 } elseif ( $wgUser->isAnon() ) {
2711                         if ( $this->formtype != 'preview' ) {
2712                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2713                         } else {
2714                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2715                         }
2716                 } else {
2717                         if ( $this->isCssJsSubpage ) {
2718                                 # Check the skin exists
2719                                 if ( $this->isWrongCaseCssJsPage ) {
2720                                         $wgOut->wrapWikiMsg(
2721                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2722                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2723                                         );
2724                                 }
2725                                 if ( $this->formtype !== 'preview' ) {
2726                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2727                                                 $wgOut->wrapWikiMsg(
2728                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2729                                                         array( 'usercssyoucanpreview' )
2730                                                 );
2731                                         }
2732
2733                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2734                                                 $wgOut->wrapWikiMsg(
2735                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2736                                                         array( 'userjsyoucanpreview' )
2737                                                 );
2738                                         }
2739                                 }
2740                         }
2741                 }
2742
2743                 if ( $this->mTitle->isProtected( 'edit' ) &&
2744                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2745                 ) {
2746                         # Is the title semi-protected?
2747                         if ( $this->mTitle->isSemiProtected() ) {
2748                                 $noticeMsg = 'semiprotectedpagewarning';
2749                         } else {
2750                                 # Then it must be protected based on static groups (regular)
2751                                 $noticeMsg = 'protectedpagewarning';
2752                         }
2753                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2754                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2755                 }
2756                 if ( $this->mTitle->isCascadeProtected() ) {
2757                         # Is this page under cascading protection from some source pages?
2758                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2759                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2760                         $cascadeSourcesCount = count( $cascadeSources );
2761                         if ( $cascadeSourcesCount > 0 ) {
2762                                 # Explain, and list the titles responsible
2763                                 foreach ( $cascadeSources as $page ) {
2764                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2765                                 }
2766                         }
2767                         $notice .= '</div>';
2768                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2769                 }
2770                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2771                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2772                                 array( 'lim' => 1,
2773                                         'showIfEmpty' => false,
2774                                         'msgKey' => array( 'titleprotectedwarning' ),
2775                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2776                 }
2777
2778                 if ( $this->kblength === false ) {
2779                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2780                 }
2781
2782                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2783                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2784                                 array(
2785                                         'longpageerror',
2786                                         $wgLang->formatNum( $this->kblength ),
2787                                         $wgLang->formatNum( $wgMaxArticleSize )
2788                                 )
2789                         );
2790                 } else {
2791                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2792                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2793                                         array(
2794                                                 'longpage-hint',
2795                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2796                                                 strlen( $this->textbox1 )
2797                                         )
2798                                 );
2799                         }
2800                 }
2801                 # Add header copyright warning
2802                 $this->showHeaderCopyrightWarning();
2803
2804                 return true;
2805         }
2806
2807         /**
2808          * Standard summary input and label (wgSummary), abstracted so EditPage
2809          * subclasses may reorganize the form.
2810          * Note that you do not need to worry about the label's for=, it will be
2811          * inferred by the id given to the input. You can remove them both by
2812          * passing array( 'id' => false ) to $userInputAttrs.
2813          *
2814          * @param string $summary The value of the summary input
2815          * @param string $labelText The html to place inside the label
2816          * @param array $inputAttrs Array of attrs to use on the input
2817          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2818          *
2819          * @return array An array in the format array( $label, $input )
2820          */
2821         function getSummaryInput( $summary = "", $labelText = null,
2822                 $inputAttrs = null, $spanLabelAttrs = null
2823         ) {
2824                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2825                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2826                         'id' => 'wpSummary',
2827                         'maxlength' => '200',
2828                         'tabindex' => '1',
2829                         'size' => 60,
2830                         'spellcheck' => 'true',
2831                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2832
2833                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2834                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2835                         'id' => "wpSummaryLabel"
2836                 );
2837
2838                 $label = null;
2839                 if ( $labelText ) {
2840                         $label = Xml::tags(
2841                                 'label',
2842                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2843                                 $labelText
2844                         );
2845                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2846                 }
2847
2848                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2849
2850                 return array( $label, $input );
2851         }
2852
2853         /**
2854          * @param bool $isSubjectPreview true if this is the section subject/title
2855          *   up top, or false if this is the comment summary
2856          *   down below the textarea
2857          * @param string $summary The text of the summary to display
2858          * @return string
2859          */
2860         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2861                 global $wgOut, $wgContLang;
2862                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2863                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2864                 if ( $isSubjectPreview ) {
2865                         if ( $this->nosummary ) {
2866                                 return;
2867                         }
2868                 } else {
2869                         if ( !$this->mShowSummaryField ) {
2870                                 return;
2871                         }
2872                 }
2873                 $summary = $wgContLang->recodeForEdit( $summary );
2874                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2875                 list( $label, $input ) = $this->getSummaryInput(
2876                         $summary,
2877                         $labelText,
2878                         array( 'class' => $summaryClass ),
2879                         array()
2880                 );
2881                 $wgOut->addHTML( "{$label} {$input}" );
2882         }
2883
2884         /**
2885          * @param bool $isSubjectPreview true if this is the section subject/title
2886          *   up top, or false if this is the comment summary
2887          *   down below the textarea
2888          * @param string $summary The text of the summary to display
2889          * @return string
2890          */
2891         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2892                 // avoid spaces in preview, gets always trimmed on save
2893                 $summary = trim( $summary );
2894                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2895                         return "";
2896                 }
2897
2898                 global $wgParser;
2899
2900                 if ( $isSubjectPreview ) {
2901                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2902                                 ->inContentLanguage()->text();
2903                 }
2904
2905                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2906
2907                 $summary = wfMessage( $message )->parse()
2908                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2909                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2910         }
2911
2912         protected function showFormBeforeText() {
2913                 global $wgOut;
2914                 $section = htmlspecialchars( $this->section );
2915                 $wgOut->addHTML( <<<HTML
2916 <input type='hidden' value="{$section}" name="wpSection" />
2917 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2918 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2919 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2920
2921 HTML
2922                 );
2923                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2924                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2925                 }
2926         }
2927
2928         protected function showFormAfterText() {
2929                 global $wgOut, $wgUser;
2930                 /**
2931                  * To make it harder for someone to slip a user a page
2932                  * which submits an edit form to the wiki without their
2933                  * knowledge, a random token is associated with the login
2934                  * session. If it's not passed back with the submission,
2935                  * we won't save the page, or render user JavaScript and
2936                  * CSS previews.
2937                  *
2938                  * For anon editors, who may not have a session, we just
2939                  * include the constant suffix to prevent editing from
2940                  * broken text-mangling proxies.
2941                  */
2942                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2943         }
2944
2945         /**
2946          * Subpage overridable method for printing the form for page content editing
2947          * By default this simply outputs wpTextbox1
2948          * Subclasses can override this to provide a custom UI for editing;
2949          * be it a form, or simply wpTextbox1 with a modified content that will be
2950          * reverse modified when extracted from the post data.
2951          * Note that this is basically the inverse for importContentFormData
2952          */
2953         protected function showContentForm() {
2954                 $this->showTextbox1();
2955         }
2956
2957         /**
2958          * Method to output wpTextbox1
2959          * The $textoverride method can be used by subclasses overriding showContentForm
2960          * to pass back to this method.
2961          *
2962          * @param array $customAttribs Array of html attributes to use in the textarea
2963          * @param string $textoverride Optional text to override $this->textarea1 with
2964          */
2965         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2966                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2967                         $attribs = array( 'style' => 'display:none;' );
2968                 } else {
2969                         $classes = array(); // Textarea CSS
2970                         if ( $this->mTitle->isProtected( 'edit' ) &&
2971                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2972                         ) {
2973                                 # Is the title semi-protected?
2974                                 if ( $this->mTitle->isSemiProtected() ) {
2975                                         $classes[] = 'mw-textarea-sprotected';
2976                                 } else {
2977                                         # Then it must be protected based on static groups (regular)
2978                                         $classes[] = 'mw-textarea-protected';
2979                                 }
2980                                 # Is the title cascade-protected?
2981                                 if ( $this->mTitle->isCascadeProtected() ) {
2982                                         $classes[] = 'mw-textarea-cprotected';
2983                                 }
2984                         }
2985
2986                         $attribs = array( 'tabindex' => 1 );
2987
2988                         if ( is_array( $customAttribs ) ) {
2989                                 $attribs += $customAttribs;
2990                         }
2991
2992                         if ( count( $classes ) ) {
2993                                 if ( isset( $attribs['class'] ) ) {
2994                                         $classes[] = $attribs['class'];
2995                                 }
2996                                 $attribs['class'] = implode( ' ', $classes );
2997                         }
2998                 }
2999
3000                 $this->showTextbox(
3001                         $textoverride !== null ? $textoverride : $this->textbox1,
3002                         'wpTextbox1',
3003                         $attribs
3004                 );
3005         }
3006
3007         protected function showTextbox2() {
3008                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
3009         }
3010
3011         protected function showTextbox( $text, $name, $customAttribs = array() ) {
3012                 global $wgOut, $wgUser;
3013
3014                 $wikitext = $this->safeUnicodeOutput( $text );
3015                 if ( strval( $wikitext ) !== '' ) {
3016                         // Ensure there's a newline at the end, otherwise adding lines
3017                         // is awkward.
3018                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3019                         // mode will show an extra newline. A bit annoying.
3020                         $wikitext .= "\n";
3021                 }
3022
3023                 $attribs = $customAttribs + array(
3024                         'accesskey' => ',',
3025                         'id' => $name,
3026                         'cols' => $wgUser->getIntOption( 'cols' ),
3027                         'rows' => $wgUser->getIntOption( 'rows' ),
3028                         // Avoid PHP notices when appending preferences
3029                         // (appending allows customAttribs['style'] to still work).
3030                         'style' => ''
3031                 );
3032
3033                 $pageLang = $this->mTitle->getPageLanguage();
3034                 $attribs['lang'] = $pageLang->getCode();
3035                 $attribs['dir'] = $pageLang->getDir();
3036
3037                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3038         }
3039
3040         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3041                 global $wgOut;
3042                 $classes = array();
3043                 if ( $isOnTop ) {
3044                         $classes[] = 'ontop';
3045                 }
3046
3047                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3048
3049                 if ( $this->formtype != 'preview' ) {
3050                         $attribs['style'] = 'display: none;';
3051                 }
3052
3053                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3054
3055                 if ( $this->formtype == 'preview' ) {
3056                         $this->showPreview( $previewOutput );
3057                 }
3058
3059                 $wgOut->addHTML( '</div>' );
3060
3061                 if ( $this->formtype == 'diff' ) {
3062                         try {
3063                                 $this->showDiff();
3064                         } catch ( MWContentSerializationException $ex ) {
3065                                 $msg = wfMessage(
3066                                         'content-failed-to-parse',
3067                                         $this->contentModel,
3068                                         $this->contentFormat,
3069                                         $ex->getMessage()
3070                                 );
3071                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3072                         }
3073                 }
3074         }
3075
3076         /**
3077          * Append preview output to $wgOut.
3078          * Includes category rendering if this is a category page.
3079          *
3080          * @param string $text The HTML to be output for the preview.
3081          */
3082         protected function showPreview( $text ) {
3083                 global $wgOut;
3084                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3085                         $this->mArticle->openShowCategory();
3086                 }
3087                 # This hook seems slightly odd here, but makes things more
3088                 # consistent for extensions.
3089                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3090                 $wgOut->addHTML( $text );
3091                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3092                         $this->mArticle->closeShowCategory();
3093                 }
3094         }
3095
3096         /**
3097          * Get a diff between the current contents of the edit box and the
3098          * version of the page we're editing from.
3099          *
3100          * If this is a section edit, we'll replace the section as for final
3101          * save and then make a comparison.
3102          */
3103         function showDiff() {
3104                 global $wgUser, $wgContLang, $wgOut;
3105
3106                 $oldtitlemsg = 'currentrev';
3107                 # if message does not exist, show diff against the preloaded default
3108                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3109                         $oldtext = $this->mTitle->getDefaultMessageText();
3110                         if ( $oldtext !== false ) {
3111                                 $oldtitlemsg = 'defaultmessagetext';
3112                                 $oldContent = $this->toEditContent( $oldtext );
3113                         } else {
3114                                 $oldContent = null;
3115                         }
3116                 } else {
3117                         $oldContent = $this->getCurrentContent();
3118                 }
3119
3120                 $textboxContent = $this->toEditContent( $this->textbox1 );
3121
3122                 $newContent = $this->mArticle->replaceSectionContent(
3123                                                         $this->section, $textboxContent,
3124                                                         $this->summary, $this->edittime );
3125
3126                 if ( $newContent ) {
3127                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3128                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3129
3130                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3131                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3132                 }
3133
3134                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3135                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3136                         $newtitle = wfMessage( 'yourtext' )->parse();
3137
3138                         if ( !$oldContent ) {
3139                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3140                         }
3141
3142                         if ( !$newContent ) {
3143                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3144                         }
3145
3146                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3147                         $de->setContent( $oldContent, $newContent );
3148
3149                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3150                         $de->showDiffStyle();
3151                 } else {
3152                         $difftext = '';
3153                 }
3154
3155                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3156         }
3157
3158         /**
3159          * Show the header copyright warning.
3160          */
3161         protected function showHeaderCopyrightWarning() {
3162                 $msg = 'editpage-head-copy-warn';
3163                 if ( !wfMessage( $msg )->isDisabled() ) {
3164                         global $wgOut;
3165                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3166                                 'editpage-head-copy-warn' );
3167                 }
3168         }
3169
3170         /**
3171          * Give a chance for site and per-namespace customizations of
3172          * terms of service summary link that might exist separately
3173          * from the copyright notice.
3174          *
3175          * This will display between the save button and the edit tools,
3176          * so should remain short!
3177          */
3178         protected function showTosSummary() {
3179                 $msg = 'editpage-tos-summary';
3180                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3181                 if ( !wfMessage( $msg )->isDisabled() ) {
3182                         global $wgOut;
3183                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3184                         $wgOut->addWikiMsg( $msg );
3185                         $wgOut->addHTML( '</div>' );
3186                 }
3187         }
3188
3189         protected function showEditTools() {
3190                 global $wgOut;
3191                 $wgOut->addHTML( '<div class="mw-editTools">' .
3192                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3193                         '</div>' );
3194         }
3195
3196         /**
3197          * Get the copyright warning
3198          *
3199          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3200          */
3201         protected function getCopywarn() {
3202                 return self::getCopyrightWarning( $this->mTitle );
3203         }
3204
3205         /**
3206          * Get the copyright warning, by default returns wikitext
3207          *
3208          * @param Title $title
3209          * @param string $format Output format, valid values are any function of a Message object
3210          * @return string
3211          */
3212         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3213                 global $wgRightsText;
3214                 if ( $wgRightsText ) {
3215                         $copywarnMsg = array( 'copyrightwarning',
3216                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3217                                 $wgRightsText );
3218                 } else {
3219                         $copywarnMsg = array( 'copyrightwarning2',
3220                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3221                 }
3222                 // Allow for site and per-namespace customization of contribution/copyright notice.
3223                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3224
3225                 return "<div id=\"editpage-copywarn\">\n" .
3226                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3227         }
3228
3229         /**
3230          * Get the Limit report for page previews
3231          *
3232          * @since 1.22
3233          * @param ParserOutput $output ParserOutput object from the parse
3234          * @return string HTML
3235          */
3236         public static function getPreviewLimitReport( $output ) {
3237                 if ( !$output || !$output->getLimitReportData() ) {
3238                         return '';
3239                 }
3240
3241                 wfProfileIn( __METHOD__ );
3242
3243                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3244                         wfMessage( 'limitreport-title' )->parseAsBlock()
3245                 );
3246
3247                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3248                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3249
3250                 $limitReport .= Html::openElement( 'table', array(
3251                         'class' => 'preview-limit-report wikitable'
3252                 ) ) .
3253                         Html::openElement( 'tbody' );
3254
3255                 foreach ( $output->getLimitReportData() as $key => $value ) {
3256                         if ( wfRunHooks( 'ParserLimitReportFormat',
3257                                 array( $key, &$value, &$limitReport, true, true )
3258                         ) ) {
3259                                 $keyMsg = wfMessage( $key );
3260                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3261                                 if ( !$valueMsg->exists() ) {
3262                                         $valueMsg = new RawMessage( '$1' );
3263                                 }
3264                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3265                                         $limitReport .= Html::openElement( 'tr' ) .
3266                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3267                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3268                                                 Html::closeElement( 'tr' );
3269                                 }
3270                         }
3271                 }
3272
3273                 $limitReport .= Html::closeElement( 'tbody' ) .
3274                         Html::closeElement( 'table' ) .
3275                         Html::closeElement( 'div' );
3276
3277                 wfProfileOut( __METHOD__ );
3278
3279                 return $limitReport;
3280         }
3281
3282         protected function showStandardInputs( &$tabindex = 2 ) {
3283                 global $wgOut;
3284                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3285
3286                 if ( $this->section != 'new' ) {
3287                         $this->showSummaryInput( false, $this->summary );
3288                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3289                 }
3290
3291                 $checkboxes = $this->getCheckboxes( $tabindex,
3292                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3293                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3294
3295                 // Show copyright warning.
3296                 $wgOut->addWikiText( $this->getCopywarn() );
3297                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3298
3299                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3300                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3301
3302                 $cancel = $this->getCancelLink();
3303                 if ( $cancel !== '' ) {
3304                         $cancel .= Html::element( 'span',
3305                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3306                                 wfMessage( 'pipe-separator' )->text() );
3307                 }
3308
3309                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3310                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3311                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3312                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3313                         wfMessage( 'newwindow' )->parse();
3314
3315                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3316                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3317                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3318
3319                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3320
3321                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3322         }
3323
3324         /**
3325          * Show an edit conflict. textbox1 is already shown in showEditForm().
3326          * If you want to use another entry point to this function, be careful.
3327          */
3328         protected function showConflict() {
3329                 global $wgOut;
3330
3331                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3332                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3333
3334                         $content1 = $this->toEditContent( $this->textbox1 );
3335                         $content2 = $this->toEditContent( $this->textbox2 );
3336
3337                         $handler = ContentHandler::getForModelID( $this->contentModel );
3338                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3339                         $de->setContent( $content2, $content1 );
3340                         $de->showDiff(
3341                                 wfMessage( 'yourtext' )->parse(),
3342                                 wfMessage( 'storedversion' )->text()
3343                         );
3344
3345                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3346                         $this->showTextbox2();
3347                 }
3348         }
3349
3350         /**
3351          * @return string
3352          */
3353         public function getCancelLink() {
3354                 $cancelParams = array();
3355                 if ( !$this->isConflict && $this->oldid > 0 ) {
3356                         $cancelParams['oldid'] = $this->oldid;
3357                 }
3358
3359                 return Linker::linkKnown(
3360                         $this->getContextTitle(),
3361                         wfMessage( 'cancel' )->parse(),
3362                         array( 'id' => 'mw-editform-cancel' ),
3363                         $cancelParams
3364                 );
3365         }
3366
3367         /**
3368          * Returns the URL to use in the form's action attribute.
3369          * This is used by EditPage subclasses when simply customizing the action
3370          * variable in the constructor is not enough. This can be used when the
3371          * EditPage lives inside of a Special page rather than a custom page action.
3372          *
3373          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3374          * @return string
3375          */
3376         protected function getActionURL( Title $title ) {
3377                 return $title->getLocalURL( array( 'action' => $this->action ) );
3378         }
3379
3380         /**
3381          * Check if a page was deleted while the user was editing it, before submit.
3382          * Note that we rely on the logging table, which hasn't been always there,
3383          * but that doesn't matter, because this only applies to brand new
3384          * deletes.
3385          * @return bool
3386          */
3387         protected function wasDeletedSinceLastEdit() {
3388                 if ( $this->deletedSinceEdit !== null ) {
3389                         return $this->deletedSinceEdit;
3390                 }
3391
3392                 $this->deletedSinceEdit = false;
3393
3394                 if ( $this->mTitle->isDeletedQuick() ) {
3395                         $this->lastDelete = $this->getLastDelete();
3396                         if ( $this->lastDelete ) {
3397                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3398                                 if ( $deleteTime > $this->starttime ) {
3399                                         $this->deletedSinceEdit = true;
3400                                 }
3401                         }
3402                 }
3403
3404                 return $this->deletedSinceEdit;
3405         }
3406
3407         /**
3408          * @return bool|stdClass
3409          */
3410         protected function getLastDelete() {
3411                 $dbr = wfGetDB( DB_SLAVE );
3412                 $data = $dbr->selectRow(
3413                         array( 'logging', 'user' ),
3414                         array(
3415                                 'log_type',
3416                                 'log_action',
3417                                 'log_timestamp',
3418                                 'log_user',
3419                                 'log_namespace',
3420                                 'log_title',
3421                                 'log_comment',
3422                                 'log_params',
3423                                 'log_deleted',
3424                                 'user_name'
3425                         ), array(
3426                                 'log_namespace' => $this->mTitle->getNamespace(),
3427                                 'log_title' => $this->mTitle->getDBkey(),
3428                                 'log_type' => 'delete',
3429                                 'log_action' => 'delete',
3430                                 'user_id=log_user'
3431                         ),
3432                         __METHOD__,
3433                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3434                 );
3435                 // Quick paranoid permission checks...
3436                 if ( is_object( $data ) ) {
3437                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3438                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3439                         }
3440
3441                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3442                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3443                         }
3444                 }
3445
3446                 return $data;
3447         }
3448
3449         /**
3450          * Get the rendered text for previewing.
3451          * @throws MWException
3452          * @return string
3453          */
3454         function getPreviewText() {
3455                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3456                 global $wgAllowUserCss, $wgAllowUserJs;
3457
3458                 wfProfileIn( __METHOD__ );
3459
3460                 if ( $wgRawHtml && !$this->mTokenOk ) {
3461                         // Could be an offsite preview attempt. This is very unsafe if
3462                         // HTML is enabled, as it could be an attack.
3463                         $parsedNote = '';
3464                         if ( $this->textbox1 !== '' ) {
3465                                 // Do not put big scary notice, if previewing the empty
3466                                 // string, which happens when you initially edit
3467                                 // a category page, due to automatic preview-on-open.
3468                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3469                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3470                         }
3471                         wfProfileOut( __METHOD__ );
3472                         return $parsedNote;
3473                 }
3474
3475                 $note = '';
3476
3477                 try {
3478                         $content = $this->toEditContent( $this->textbox1 );
3479
3480                         $previewHTML = '';
3481                         if ( !wfRunHooks(
3482                                 'AlternateEditPreview',
3483                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3484                         ) {
3485                                 wfProfileOut( __METHOD__ );
3486                                 return $previewHTML;
3487                         }
3488
3489                         # provide a anchor link to the editform
3490                         $continueEditing = '<span class="mw-continue-editing">' .
3491                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3492                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3493                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3494                                 if ( $this->mTokenOkExceptSuffix ) {
3495                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3496                                 } else {
3497                                         $note = wfMessage( 'session_fail_preview' )->plain();
3498                                 }
3499                         } elseif ( $this->incompleteForm ) {
3500                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3501                         } else {
3502                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3503                         }
3504
3505                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3506                         $parserOptions->setEditSection( false );
3507                         $parserOptions->setIsPreview( true );
3508                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3509
3510                         # don't parse non-wikitext pages, show message about preview
3511                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3512                                 if ( $this->mTitle->isCssJsSubpage() ) {
3513                                         $level = 'user';
3514                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3515                                         $level = 'site';
3516                                 } else {
3517                                         $level = false;
3518                                 }
3519
3520                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3521                                         $format = 'css';
3522                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3523                                                 $format = false;
3524                                         }
3525                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3526                                         $format = 'js';
3527                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3528                                                 $format = false;
3529                                         }
3530                                 } else {
3531                                         $format = false;
3532                                 }
3533
3534                                 # Used messages to make sure grep find them:
3535                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3536                                 if ( $level && $format ) {
3537                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3538                                                 wfMessage( "{$level}{$format}preview" )->text() .
3539                                                 ' ' . $continueEditing . "</div>";
3540                                 }
3541                         }
3542
3543                         # If we're adding a comment, we need to show the
3544                         # summary as the headline
3545                         if ( $this->section === "new" && $this->summary !== "" ) {
3546                                 $content = $content->addSectionHeader( $this->summary );
3547                         }
3548
3549                         $hook_args = array( $this, &$content );
3550                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3551                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3552
3553                         $parserOptions->enableLimitReport();
3554
3555                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3556                         # But it's now deprecated, so never mind
3557
3558                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3559                         $parserOutput = $content->getParserOutput(
3560                                 $this->getArticle()->getTitle(),
3561                                 null,
3562                                 $parserOptions
3563                         );
3564
3565                         $previewHTML = $parserOutput->getText();
3566                         $this->mParserOutput = $parserOutput;
3567                         $wgOut->addParserOutputMetadata( $parserOutput );
3568
3569                         if ( count( $parserOutput->getWarnings() ) ) {
3570                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3571                         }
3572                 } catch ( MWContentSerializationException $ex ) {
3573                         $m = wfMessage(
3574                                 'content-failed-to-parse',
3575                                 $this->contentModel,
3576                                 $this->contentFormat,
3577                                 $ex->getMessage()
3578                         );
3579                         $note .= "\n\n" . $m->parse();
3580                         $previewHTML = '';
3581                 }
3582
3583                 if ( $this->isConflict ) {
3584                         $conflict = '<h2 id="mw-previewconflict">'
3585                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3586                 } else {
3587                         $conflict = '<hr />';
3588                 }
3589
3590                 $previewhead = "<div class='previewnote'>\n" .
3591                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3592                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3593
3594                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3595                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3596                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3597                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3598
3599                 wfProfileOut( __METHOD__ );
3600                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3601         }
3602
3603         /**
3604          * @return array
3605          */
3606         function getTemplates() {
3607                 if ( $this->preview || $this->section != '' ) {
3608                         $templates = array();
3609                         if ( !isset( $this->mParserOutput ) ) {
3610                                 return $templates;
3611                         }
3612                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3613                                 foreach ( array_keys( $template ) as $dbk ) {
3614                                         $templates[] = Title::makeTitle( $ns, $dbk );
3615                                 }
3616                         }
3617                         return $templates;
3618                 } else {
3619                         return $this->mTitle->getTemplateLinksFrom();
3620                 }
3621         }
3622
3623         /**
3624          * Shows a bulletin board style toolbar for common editing functions.
3625          * It can be disabled in the user preferences.
3626          * The necessary JavaScript code can be found in skins/common/edit.js.
3627          *
3628          * @return string
3629          */
3630         static function getEditToolbar() {
3631                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3632                 global $wgEnableUploads, $wgForeignFileRepos;
3633
3634                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3635
3636                 /**
3637                  * $toolarray is an array of arrays each of which includes the
3638                  * filename of the button image (without path), the opening
3639                  * tag, the closing tag, optionally a sample text that is
3640                  * inserted between the two when no selection is highlighted
3641                  * and.  The tip text is shown when the user moves the mouse
3642                  * over the button.
3643                  *
3644                  * Also here: accesskeys (key), which are not used yet until
3645                  * someone can figure out a way to make them work in
3646                  * IE. However, we should make sure these keys are not defined
3647                  * on the edit page.
3648                  */
3649                 $toolarray = array(
3650                         array(
3651                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3652                                 'id'     => 'mw-editbutton-bold',
3653                                 'open'   => '\'\'\'',
3654                                 'close'  => '\'\'\'',
3655                                 'sample' => wfMessage( 'bold_sample' )->text(),
3656                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3657                                 'key'    => 'B'
3658                         ),
3659                         array(
3660                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3661                                 'id'     => 'mw-editbutton-italic',
3662                                 'open'   => '\'\'',
3663                                 'close'  => '\'\'',
3664                                 'sample' => wfMessage( 'italic_sample' )->text(),
3665                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3666                                 'key'    => 'I'
3667                         ),
3668                         array(
3669                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3670                                 'id'     => 'mw-editbutton-link',
3671                                 'open'   => '[[',
3672                                 'close'  => ']]',
3673                                 'sample' => wfMessage( 'link_sample' )->text(),
3674                                 'tip'    => wfMessage( 'link_tip' )->text(),
3675                                 'key'    => 'L'
3676                         ),
3677                         array(
3678                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3679                                 'id'     => 'mw-editbutton-extlink',
3680                                 'open'   => '[',
3681                                 'close'  => ']',
3682                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3683                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3684                                 'key'    => 'X'
3685                         ),
3686                         array(
3687                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3688                                 'id'     => 'mw-editbutton-headline',
3689                                 'open'   => "\n== ",
3690                                 'close'  => " ==\n",
3691                                 'sample' => wfMessage( 'headline_sample' )->text(),
3692                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3693                                 'key'    => 'H'
3694                         ),
3695                         $imagesAvailable ? array(
3696                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3697                                 'id'     => 'mw-editbutton-image',
3698                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3699                                 'close'  => ']]',
3700                                 'sample' => wfMessage( 'image_sample' )->text(),
3701                                 'tip'    => wfMessage( 'image_tip' )->text(),
3702                                 'key'    => 'D',
3703                         ) : false,
3704                         $imagesAvailable ? array(
3705                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3706                                 'id'     => 'mw-editbutton-media',
3707                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3708                                 'close'  => ']]',
3709                                 'sample' => wfMessage( 'media_sample' )->text(),
3710                                 'tip'    => wfMessage( 'media_tip' )->text(),
3711                                 'key'    => 'M'
3712                         ) : false,
3713                         array(
3714                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3715                                 'id'     => 'mw-editbutton-nowiki',
3716                                 'open'   => "<nowiki>",
3717                                 'close'  => "</nowiki>",
3718                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3719                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3720                                 'key'    => 'N'
3721                         ),
3722                         array(
3723                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3724                                 'id'     => 'mw-editbutton-signature',
3725                                 'open'   => '--~~~~',
3726                                 'close'  => '',
3727                                 'sample' => '',
3728                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3729                                 'key'    => 'Y'
3730                         ),
3731                         array(
3732                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3733                                 'id'     => 'mw-editbutton-hr',
3734                                 'open'   => "\n----\n",
3735                                 'close'  => '',
3736                                 'sample' => '',
3737                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3738                                 'key'    => 'R'
3739                         )
3740                 );
3741
3742                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3743                 foreach ( $toolarray as $tool ) {
3744                         if ( !$tool ) {
3745                                 continue;
3746                         }
3747
3748                         $params = array(
3749                                 $wgStylePath . '/common/images/' . $tool['image'],
3750                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3751                                 // Older browsers show a "speedtip" type message only for ALT.
3752                                 // Ideally these should be different, realistically they
3753                                 // probably don't need to be.
3754                                 $tool['tip'],
3755                                 $tool['open'],
3756                                 $tool['close'],
3757                                 $tool['sample'],
3758                                 $tool['id'],
3759                         );
3760
3761                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3762                 }
3763
3764                 // This used to be called on DOMReady from mediawiki.action.edit, which
3765                 // ended up causing race conditions with the setup code above.
3766                 $script .= "\n" .
3767                         "// Create button bar\n" .
3768                         "$(function() { mw.toolbar.init(); } );\n";
3769
3770                 $script .= '});';
3771                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3772
3773                 $toolbar = '<div id="toolbar"></div>';
3774
3775                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3776
3777                 return $toolbar;
3778         }
3779
3780         /**
3781          * Returns an array of html code of the following checkboxes:
3782          * minor and watch
3783          *
3784          * @param int $tabindex Current tabindex
3785          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3786          *                 status of the checkbox
3787          *
3788          * @return array
3789          */
3790         public function getCheckboxes( &$tabindex, $checked ) {
3791                 global $wgUser;
3792
3793                 $checkboxes = array();
3794
3795                 // don't show the minor edit checkbox if it's a new page or section
3796                 if ( !$this->isNew ) {
3797                         $checkboxes['minor'] = '';
3798                         $minorLabel = wfMessage( 'minoredit' )->parse();
3799                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3800                                 $attribs = array(
3801                                         'tabindex' => ++$tabindex,
3802                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3803                                         'id' => 'wpMinoredit',
3804                                 );
3805                                 $checkboxes['minor'] =
3806                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3807                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3808                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3809                                         ">{$minorLabel}</label>";
3810                         }
3811                 }
3812
3813                 $watchLabel = wfMessage( 'watchthis' )->parse();
3814                 $checkboxes['watch'] = '';
3815                 if ( $wgUser->isLoggedIn() ) {
3816                         $attribs = array(
3817                                 'tabindex' => ++$tabindex,
3818                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3819                                 'id' => 'wpWatchthis',
3820                         );
3821                         $checkboxes['watch'] =
3822                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3823                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3824                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3825                                 ">{$watchLabel}</label>";
3826                 }
3827                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3828                 return $checkboxes;
3829         }
3830
3831         /**
3832          * Returns an array of html code of the following buttons:
3833          * save, diff, preview and live
3834          *
3835          * @param int $tabindex Current tabindex
3836          *
3837          * @return array
3838          */
3839         public function getEditButtons( &$tabindex ) {
3840                 $buttons = array();
3841
3842                 $attribs = array(
3843                         'id' => 'wpSave',
3844                         'name' => 'wpSave',
3845                         'type' => 'submit',
3846                         'tabindex' => ++$tabindex,
3847                         'value' => wfMessage( 'savearticle' )->text(),
3848                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3849                 $buttons['save'] = Xml::element( 'input', $attribs, '' );
3850
3851                 ++$tabindex; // use the same for preview and live preview
3852                 $attribs = array(
3853                         'id' => 'wpPreview',
3854                         'name' => 'wpPreview',
3855                         'type' => 'submit',
3856                         'tabindex' => $tabindex,
3857                         'value' => wfMessage( 'showpreview' )->text(),
3858                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3859                 $buttons['preview'] = Xml::element( 'input', $attribs, '' );
3860                 $buttons['live'] = '';
3861
3862                 $attribs = array(
3863                         'id' => 'wpDiff',
3864                         'name' => 'wpDiff',
3865                         'type' => 'submit',
3866                         'tabindex' => ++$tabindex,
3867                         'value' => wfMessage( 'showdiff' )->text(),
3868                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3869                 $buttons['diff'] = Xml::element( 'input', $attribs, '' );
3870
3871                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3872                 return $buttons;
3873         }
3874
3875         /**
3876          * Output preview text only. This can be sucked into the edit page
3877          * via JavaScript, and saves the server time rendering the skin as
3878          * well as theoretically being more robust on the client (doesn't
3879          * disturb the edit box's undo history, won't eat your text on
3880          * failure, etc).
3881          *
3882          * @todo This doesn't include category or interlanguage links.
3883          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3884          *       or something...</s>" that might also require more skin
3885          *       initialization, so check whether that's a problem.
3886          */
3887         function livePreview() {
3888                 global $wgOut;
3889                 $wgOut->disable();
3890                 header( 'Content-type: text/xml; charset=utf-8' );
3891                 header( 'Cache-control: no-cache' );
3892
3893                 $previewText = $this->getPreviewText();
3894                 #$categories = $skin->getCategoryLinks();
3895
3896                 $s =
3897                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3898                         Xml::tags( 'livepreview', null,
3899                                 Xml::element( 'preview', null, $previewText )
3900                                 #.      Xml::element( 'category', null, $categories )
3901                         );
3902                 echo $s;
3903         }
3904
3905         /**
3906          * Call the stock "user is blocked" page
3907          *
3908          * @deprecated since 1.19; throw an exception directly instead
3909          */
3910         function blockedPage() {
3911                 wfDeprecated( __METHOD__, '1.19' );
3912                 global $wgUser;
3913
3914                 throw new UserBlockedError( $wgUser->getBlock() );
3915         }
3916
3917         /**
3918          * Produce the stock "please login to edit pages" page
3919          *
3920          * @deprecated since 1.19; throw an exception directly instead
3921          */
3922         function userNotLoggedInPage() {
3923                 wfDeprecated( __METHOD__, '1.19' );
3924                 throw new PermissionsError( 'edit' );
3925         }
3926
3927         /**
3928          * Show an error page saying to the user that he has insufficient permissions
3929          * to create a new page
3930          *
3931          * @deprecated since 1.19; throw an exception directly instead
3932          */
3933         function noCreatePermission() {
3934                 wfDeprecated( __METHOD__, '1.19' );
3935                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3936                 throw new PermissionsError( $permission );
3937         }
3938
3939         /**
3940          * Creates a basic error page which informs the user that
3941          * they have attempted to edit a nonexistent section.
3942          */
3943         function noSuchSectionPage() {
3944                 global $wgOut;
3945
3946                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3947
3948                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3949                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3950                 $wgOut->addHTML( $res );
3951
3952                 $wgOut->returnToMain( false, $this->mTitle );
3953         }
3954
3955         /**
3956          * Show "your edit contains spam" page with your diff and text
3957          *
3958          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3959          */
3960         public function spamPageWithContent( $match = false ) {
3961                 global $wgOut, $wgLang;
3962                 $this->textbox2 = $this->textbox1;
3963
3964                 if ( is_array( $match ) ) {
3965                         $match = $wgLang->listToText( $match );
3966                 }
3967                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3968
3969                 $wgOut->addHTML( '<div id="spamprotected">' );
3970                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3971                 if ( $match ) {
3972                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3973                 }
3974                 $wgOut->addHTML( '</div>' );
3975
3976                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3977                 $this->showDiff();
3978
3979                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3980                 $this->showTextbox2();
3981
3982                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3983         }
3984
3985         /**
3986          * Check if the browser is on a blacklist of user-agents known to
3987          * mangle UTF-8 data on form submission. Returns true if Unicode
3988          * should make it through, false if it's known to be a problem.
3989          * @return bool
3990          */
3991         private function checkUnicodeCompliantBrowser() {
3992                 global $wgBrowserBlackList, $wgRequest;
3993
3994                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3995                 if ( $currentbrowser === false ) {
3996                         // No User-Agent header sent? Trust it by default...
3997                         return true;
3998                 }
3999
4000                 foreach ( $wgBrowserBlackList as $browser ) {
4001                         if ( preg_match( $browser, $currentbrowser ) ) {
4002                                 return false;
4003                         }
4004                 }
4005                 return true;
4006         }
4007
4008         /**
4009          * Filter an input field through a Unicode de-armoring process if it
4010          * came from an old browser with known broken Unicode editing issues.
4011          *
4012          * @param WebRequest $request
4013          * @param string $field
4014          * @return string
4015          */
4016         protected function safeUnicodeInput( $request, $field ) {
4017                 $text = rtrim( $request->getText( $field ) );
4018                 return $request->getBool( 'safemode' )
4019                         ? $this->unmakeSafe( $text )
4020                         : $text;
4021         }
4022
4023         /**
4024          * Filter an output field through a Unicode armoring process if it is
4025          * going to an old browser with known broken Unicode editing issues.
4026          *
4027          * @param string $text
4028          * @return string
4029          */
4030         protected function safeUnicodeOutput( $text ) {
4031                 global $wgContLang;
4032                 $codedText = $wgContLang->recodeForEdit( $text );
4033                 return $this->checkUnicodeCompliantBrowser()
4034                         ? $codedText
4035                         : $this->makeSafe( $codedText );
4036         }
4037
4038         /**
4039          * A number of web browsers are known to corrupt non-ASCII characters
4040          * in a UTF-8 text editing environment. To protect against this,
4041          * detected browsers will be served an armored version of the text,
4042          * with non-ASCII chars converted to numeric HTML character references.
4043          *
4044          * Preexisting such character references will have a 0 added to them
4045          * to ensure that round-trips do not alter the original data.
4046          *
4047          * @param string $invalue
4048          * @return string
4049          */
4050         private function makeSafe( $invalue ) {
4051                 // Armor existing references for reversibility.
4052                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4053
4054                 $bytesleft = 0;
4055                 $result = "";
4056                 $working = 0;
4057                 $valueLength = strlen( $invalue );
4058                 for ( $i = 0; $i < $valueLength; $i++ ) {
4059                         $bytevalue = ord( $invalue[$i] );
4060                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4061                                 $result .= chr( $bytevalue );
4062                                 $bytesleft = 0;
4063                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4064                                 $working = $working << 6;
4065                                 $working += ( $bytevalue & 0x3F );
4066                                 $bytesleft--;
4067                                 if ( $bytesleft <= 0 ) {
4068                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4069                                 }
4070                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4071                                 $working = $bytevalue & 0x1F;
4072                                 $bytesleft = 1;
4073                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4074                                 $working = $bytevalue & 0x0F;
4075                                 $bytesleft = 2;
4076                         } else { // 1111 0xxx
4077                                 $working = $bytevalue & 0x07;
4078                                 $bytesleft = 3;
4079                         }
4080                 }
4081                 return $result;
4082         }
4083
4084         /**
4085          * Reverse the previously applied transliteration of non-ASCII characters
4086          * back to UTF-8. Used to protect data from corruption by broken web browsers
4087          * as listed in $wgBrowserBlackList.
4088          *
4089          * @param string $invalue
4090          * @return string
4091          */
4092         private function unmakeSafe( $invalue ) {
4093                 $result = "";
4094                 $valueLength = strlen( $invalue );
4095                 for ( $i = 0; $i < $valueLength; $i++ ) {
4096                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4097                                 $i += 3;
4098                                 $hexstring = "";
4099                                 do {
4100                                         $hexstring .= $invalue[$i];
4101                                         $i++;
4102                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4103
4104                                 // Do some sanity checks. These aren't needed for reversibility,
4105                                 // but should help keep the breakage down if the editor
4106                                 // breaks one of the entities whilst editing.
4107                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
4108                                         $codepoint = hexdec( $hexstring );
4109                                         $result .= codepointToUtf8( $codepoint );
4110                                 } else {
4111                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4112                                 }
4113                         } else {
4114                                 $result .= substr( $invalue, $i, 1 );
4115                         }
4116                 }
4117                 // reverse the transform that we made for reversibility reasons.
4118                 return strtr( $result, array( "&#x0" => "&#x" ) );
4119         }
4120 }