includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: user tried to modify the content model, but is not allowed to do that
 149          * ( User::isAllowed('editcontentmodel') == false )
 150          */
 151         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 152
 153         /**
 154          * Status: user tried to create self-redirect (redirect to the same article) and
 155          * wpIgnoreSelfRedirect == false
 156          */
 157         const AS_SELF_REDIRECT = 236;
 158
 159         /**
 160          * Status: can't parse content
 161          */
 162         const AS_PARSE_ERROR = 240;
 163
 164         /**
 165          * HTML id and name for the beginning of the edit form.
 166          */
 167         const EDITFORM_ID = 'editform';
 168
 169         /**
 170          * Prefix of key for cookie used to pass post-edit state.
 171          * The revision id edited is added after this
 172          */
 173         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 174
 175         /**
 176          * Duration of PostEdit cookie, in seconds.
 177          * The cookie will be removed instantly if the JavaScript runs.
 178          *
 179          * Otherwise, though, we don't want the cookies to accumulate.
 180          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 181          * limit of only 20 cookies per domain. This still applies at least to some
 182          * versions of IE without full updates:
 183          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 184          *
 185          * A value of 20 minutes should be enough to take into account slow loads and minor
 186          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 187          */
 188         const POST_EDIT_COOKIE_DURATION = 1200;
 189
 190         /** @var Article */
 191         public $mArticle;
 192
 193         /** @var Title */
 194         public $mTitle;
 195
 196         /** @var null|Title */
 197         private $mContextTitle = null;
 198
 199         /** @var string */
 200         public $action = 'submit';
 201
 202         /** @var bool */
 203         public $isConflict = false;
 204
 205         /** @var bool */
 206         public $isCssJsSubpage = false;
 207
 208         /** @var bool */
 209         public $isCssSubpage = false;
 210
 211         /** @var bool */
 212         public $isJsSubpage = false;
 213
 214         /** @var bool */
 215         public $isWrongCaseCssJsPage = false;
 216
 217         /** @var bool New page or new section */
 218         public $isNew = false;
 219
 220         /** @var bool */
 221         public $deletedSinceEdit;
 222
 223         /** @var string */
 224         public $formtype;
 225
 226         /** @var bool */
 227         public $firsttime;
 228
 229         /** @var bool|stdClass */
 230         public $lastDelete;
 231
 232         /** @var bool */
 233         public $mTokenOk = false;
 234
 235         /** @var bool */
 236         public $mTokenOkExceptSuffix = false;
 237
 238         /** @var bool */
 239         public $mTriedSave = false;
 240
 241         /** @var bool */
 242         public $incompleteForm = false;
 243
 244         /** @var bool */
 245         public $tooBig = false;
 246
 247         /** @var bool */
 248         public $kblength = false;
 249
 250         /** @var bool */
 251         public $missingComment = false;
 252
 253         /** @var bool */
 254         public $missingSummary = false;
 255
 256         /** @var bool */
 257         public $allowBlankSummary = false;
 258
 259         /** @var bool */
 260         protected $blankArticle = false;
 261
 262         /** @var bool */
 263         protected $allowBlankArticle = false;
 264
 265         /** @var bool */
 266         protected $selfRedirect = false;
 267
 268         /** @var bool */
 269         protected $allowSelfRedirect = false;
 270
 271         /** @var string */
 272         public $autoSumm = '';
 273
 274         /** @var string */
 275         public $hookError = '';
 276
 277         /** @var ParserOutput */
 278         public $mParserOutput;
 279
 280         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 281         public $hasPresetSummary = false;
 282
 283         /** @var bool */
 284         public $mBaseRevision = false;
 285
 286         /** @var bool */
 287         public $mShowSummaryField = true;
 288
 289         # Form values
 290
 291         /** @var bool */
 292         public $save = false;
 293
 294         /** @var bool */
 295         public $preview = false;
 296
 297         /** @var bool */
 298         public $diff = false;
 299
 300         /** @var bool */
 301         public $minoredit = false;
 302
 303         /** @var bool */
 304         public $watchthis = false;
 305
 306         /** @var bool */
 307         public $recreate = false;
 308
 309         /** @var string */
 310         public $textbox1 = '';
 311
 312         /** @var string */
 313         public $textbox2 = '';
 314
 315         /** @var string */
 316         public $summary = '';
 317
 318         /** @var bool */
 319         public $nosummary = false;
 320
 321         /** @var string */
 322         public $edittime = '';
 323
 324         /** @var string */
 325         public $section = '';
 326
 327         /** @var string */
 328         public $sectiontitle = '';
 329
 330         /** @var string */
 331         public $starttime = '';
 332
 333         /** @var int */
 334         public $oldid = 0;
 335
 336         /** @var int */
 337         public $parentRevId = 0;
 338
 339         /** @var string */
 340         public $editintro = '';
 341
 342         /** @var null */
 343         public $scrolltop = null;
 344
 345         /** @var bool */
 346         public $bot = true;
 347
 348         /** @var null|string */
 349         public $contentModel = null;
 350
 351         /** @var null|string */
 352         public $contentFormat = null;
 353
 354         # Placeholders for text injection by hooks (must be HTML)
 355         # extensions should take care to _append_ to the present value
 356
 357         /** @var string Before even the preview */
 358         public $editFormPageTop = '';
 359         public $editFormTextTop = '';
 360         public $editFormTextBeforeContent = '';
 361         public $editFormTextAfterWarn = '';
 362         public $editFormTextAfterTools = '';
 363         public $editFormTextBottom = '';
 364         public $editFormTextAfterContent = '';
 365         public $previewTextAfterContent = '';
 366         public $mPreloadContent = null;
 367
 368         /* $didSave should be set to true whenever an article was successfully altered. */
 369         public $didSave = false;
 370         public $undidRev = 0;
 371
 372         public $suppressIntro = false;
 373
 374         /** @var bool Set to true to allow editing of non-text content types. */
 375         public $allowNonTextContent = false;
 376
 377         /** @var bool */
 378         protected $edit;
 379
 380         /** @var bool */
 381         public $live;
 382
 383         /**
 384          * @param Article $article
 385          */
 386         public function __construct( Article $article ) {
 387                 $this->mArticle = $article;
 388                 $this->mTitle = $article->getTitle();
 389
 390                 $this->contentModel = $this->mTitle->getContentModel();
 391
 392                 $handler = ContentHandler::getForModelID( $this->contentModel );
 393                 $this->contentFormat = $handler->getDefaultFormat();
 394         }
 395
 396         /**
 397          * @return Article
 398          */
 399         public function getArticle() {
 400                 return $this->mArticle;
 401         }
 402
 403         /**
 404          * @since 1.19
 405          * @return Title
 406          */
 407         public function getTitle() {
 408                 return $this->mTitle;
 409         }
 410
 411         /**
 412          * Set the context Title object
 413          *
 414          * @param Title|null $title Title object or null
 415          */
 416         public function setContextTitle( $title ) {
 417                 $this->mContextTitle = $title;
 418         }
 419
 420         /**
 421          * Get the context title object.
 422          * If not set, $wgTitle will be returned. This behavior might change in
 423          * the future to return $this->mTitle instead.
 424          *
 425          * @return Title
 426          */
 427         public function getContextTitle() {
 428                 if ( is_null( $this->mContextTitle ) ) {
 429                         global $wgTitle;
 430                         return $wgTitle;
 431                 } else {
 432                         return $this->mContextTitle;
 433                 }
 434         }
 435
 436         /**
 437          * Returns if the given content model is editable.
 438          *
 439          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 440          * @return bool
 441          * @throws MWException If $modelId has no known handler
 442          */
 443         public function isSupportedContentModel( $modelId ) {
 444                 return $this->allowNonTextContent ||
 445                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 446         }
 447
 448         function submit() {
 449                 $this->edit();
 450         }
 451
 452         /**
 453          * This is the function that gets called for "action=edit". It
 454          * sets up various member variables, then passes execution to
 455          * another function, usually showEditForm()
 456          *
 457          * The edit form is self-submitting, so that when things like
 458          * preview and edit conflicts occur, we get the same form back
 459          * with the extra stuff added.  Only when the final submission
 460          * is made and all is well do we actually save and redirect to
 461          * the newly-edited page.
 462          */
 463         function edit() {
 464                 global $wgOut, $wgRequest, $wgUser;
 465                 // Allow extensions to modify/prevent this form or submission
 466                 if ( !Hooks::run( 'AlternateEdit', array( $this ) ) ) {
 467                         return;
 468                 }
 469
 470                 wfDebug( __METHOD__ . ": enter\n" );
 471
 472                 // If they used redlink=1 and the page exists, redirect to the main article
 473                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 474                         $wgOut->redirect( $this->mTitle->getFullURL() );
 475                         return;
 476                 }
 477
 478                 $this->importFormData( $wgRequest );
 479                 $this->firsttime = false;
 480
 481                 if ( $this->live ) {
 482                         $this->livePreview();
 483                         return;
 484                 }
 485
 486                 if ( wfReadOnly() && $this->save ) {
 487                         // Force preview
 488                         $this->save = false;
 489                         $this->preview = true;
 490                 }
 491
 492                 if ( $this->save ) {
 493                         $this->formtype = 'save';
 494                 } elseif ( $this->preview ) {
 495                         $this->formtype = 'preview';
 496                 } elseif ( $this->diff ) {
 497                         $this->formtype = 'diff';
 498                 } else { # First time through
 499                         $this->firsttime = true;
 500                         if ( $this->previewOnOpen() ) {
 501                                 $this->formtype = 'preview';
 502                         } else {
 503                                 $this->formtype = 'initial';
 504                         }
 505                 }
 506
 507                 $permErrors = $this->getEditPermissionErrors();
 508                 if ( $permErrors ) {
 509                         wfDebug( __METHOD__ . ": User can't edit\n" );
 510                         // Auto-block user's IP if the account was "hard" blocked
 511                         $wgUser->spreadAnyEditBlock();
 512
 513                         $this->displayPermissionsError( $permErrors );
 514
 515                         return;
 516                 }
 517
 518                 $this->isConflict = false;
 519                 // css / js subpages of user pages get a special treatment
 520                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 521                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 522                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 523                 // @todo FIXME: Silly assignment.
 524                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 525
 526                 # Show applicable editing introductions
 527                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 528                         $this->showIntro();
 529                 }
 530
 531                 # Attempt submission here.  This will check for edit conflicts,
 532                 # and redundantly check for locked database, blocked IPs, etc.
 533                 # that edit() already checked just in case someone tries to sneak
 534                 # in the back door with a hand-edited submission URL.
 535
 536                 if ( 'save' == $this->formtype ) {
 537                         if ( !$this->attemptSave() ) {
 538                                 return;
 539                         }
 540                 }
 541
 542                 # First time through: get contents, set time for conflict
 543                 # checking, etc.
 544                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 545                         if ( $this->initialiseForm() === false ) {
 546                                 $this->noSuchSectionPage();
 547                                 return;
 548                         }
 549
 550                         if ( !$this->mTitle->getArticleID() ) {
 551                                 Hooks::run( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 552                         } else {
 553                                 Hooks::run( 'EditFormInitialText', array( $this ) );
 554                         }
 555
 556                 }
 557
 558                 $this->showEditForm();
 559         }
 560
 561         /**
 562          * @return array
 563          */
 564         protected function getEditPermissionErrors() {
 565                 global $wgUser;
 566                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 567                 # Can this title be created?
 568                 if ( !$this->mTitle->exists() ) {
 569                         $permErrors = array_merge( $permErrors,
 570                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 571                 }
 572                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 573                 $remove = array();
 574                 foreach ( $permErrors as $error ) {
 575                         if ( ( $this->preview || $this->diff )
 576                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 577                         ) {
 578                                 $remove[] = $error;
 579                         }
 580                 }
 581                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 582                 return $permErrors;
 583         }
 584
 585         /**
 586          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 587          * but with the following differences:
 588          * - If redlink=1, the user will be redirected to the page
 589          * - If there is content to display or the error occurs while either saving,
 590          *   previewing or showing the difference, it will be a
 591          *   "View source for ..." page displaying the source code after the error message.
 592          *
 593          * @since 1.19
 594          * @param array $permErrors Array of permissions errors, as returned by
 595          *    Title::getUserPermissionsErrors().
 596          * @throws PermissionsError
 597          */
 598         protected function displayPermissionsError( array $permErrors ) {
 599                 global $wgRequest, $wgOut;
 600
 601                 if ( $wgRequest->getBool( 'redlink' ) ) {
 602                         // The edit page was reached via a red link.
 603                         // Redirect to the article page and let them click the edit tab if
 604                         // they really want a permission error.
 605                         $wgOut->redirect( $this->mTitle->getFullURL() );
 606                         return;
 607                 }
 608
 609                 $content = $this->getContentObject();
 610
 611                 # Use the normal message if there's nothing to display
 612                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 613                         $action = $this->mTitle->exists() ? 'edit' :
 614                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 615                         throw new PermissionsError( $action, $permErrors );
 616                 }
 617
 618                 Hooks::run( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 619
 620                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 621                 $wgOut->setPageTitle( wfMessage(
 622                         'viewsource-title',
 623                         $this->getContextTitle()->getPrefixedText()
 624                 ) );
 625                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 626                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 627                 $wgOut->addHTML( "<hr />\n" );
 628
 629                 # If the user made changes, preserve them when showing the markup
 630                 # (This happens when a user is blocked during edit, for instance)
 631                 if ( !$this->firsttime ) {
 632                         $text = $this->textbox1;
 633                         $wgOut->addWikiMsg( 'viewyourtext' );
 634                 } else {
 635                         $text = $this->toEditText( $content );
 636                         $wgOut->addWikiMsg( 'viewsourcetext' );
 637                 }
 638
 639                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 640
 641                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 642                         Linker::formatTemplates( $this->getTemplates() ) ) );
 643
 644                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 645
 646                 if ( $this->mTitle->exists() ) {
 647                         $wgOut->returnToMain( null, $this->mTitle );
 648                 }
 649         }
 650
 651         /**
 652          * Should we show a preview when the edit form is first shown?
 653          *
 654          * @return bool
 655          */
 656         protected function previewOnOpen() {
 657                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 658                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 659                         // Explicit override from request
 660                         return true;
 661                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 662                         // Explicit override from request
 663                         return false;
 664                 } elseif ( $this->section == 'new' ) {
 665                         // Nothing *to* preview for new sections
 666                         return false;
 667                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 668                         && $wgUser->getOption( 'previewonfirst' )
 669                 ) {
 670                         // Standard preference behavior
 671                         return true;
 672                 } elseif ( !$this->mTitle->exists()
 673                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 674                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 675                 ) {
 676                         // Categories are special
 677                         return true;
 678                 } else {
 679                         return false;
 680                 }
 681         }
 682
 683         /**
 684          * Checks whether the user entered a skin name in uppercase,
 685          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 686          *
 687          * @return bool
 688          */
 689         protected function isWrongCaseCssJsPage() {
 690                 if ( $this->mTitle->isCssJsSubpage() ) {
 691                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 692                         $skins = array_merge(
 693                                 array_keys( Skin::getSkinNames() ),
 694                                 array( 'common' )
 695                         );
 696                         return !in_array( $name, $skins )
 697                                 && in_array( strtolower( $name ), $skins );
 698                 } else {
 699                         return false;
 700                 }
 701         }
 702
 703         /**
 704          * Returns whether section editing is supported for the current page.
 705          * Subclasses may override this to replace the default behavior, which is
 706          * to check ContentHandler::supportsSections.
 707          *
 708          * @return bool True if this edit page supports sections, false otherwise.
 709          */
 710         protected function isSectionEditSupported() {
 711                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 712                 return $contentHandler->supportsSections();
 713         }
 714
 715         /**
 716          * This function collects the form data and uses it to populate various member variables.
 717          * @param WebRequest $request
 718          * @throws ErrorPageError
 719          */
 720         function importFormData( &$request ) {
 721                 global $wgContLang, $wgUser;
 722
 723                 # Section edit can come from either the form or a link
 724                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 725
 726                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 727                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 728                 }
 729
 730                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 731
 732                 if ( $request->wasPosted() ) {
 733                         # These fields need to be checked for encoding.
 734                         # Also remove trailing whitespace, but don't remove _initial_
 735                         # whitespace from the text boxes. This may be significant formatting.
 736                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 737                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 738                                 // Skip this if wpTextbox2 has input, it indicates that we came
 739                                 // from a conflict page with raw page text, not a custom form
 740                                 // modified by subclasses
 741                                 $textbox1 = $this->importContentFormData( $request );
 742                                 if ( $textbox1 !== null ) {
 743                                         $this->textbox1 = $textbox1;
 744                                 }
 745                         }
 746
 747                         # Truncate for whole multibyte characters
 748                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 749
 750                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 751                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 752                         # section titles.
 753                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 754
 755                         # Treat sectiontitle the same way as summary.
 756                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 757                         # currently doing double duty as both edit summary and section title. Right now this
 758                         # is just to allow API edits to work around this limitation, but this should be
 759                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 760                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 761                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 762
 763                         $this->edittime = $request->getVal( 'wpEdittime' );
 764                         $this->starttime = $request->getVal( 'wpStarttime' );
 765
 766                         $undidRev = $request->getInt( 'wpUndidRevision' );
 767                         if ( $undidRev ) {
 768                                 $this->undidRev = $undidRev;
 769                         }
 770
 771                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 772
 773                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 774                                 // wpTextbox1 field is missing, possibly due to being "too big"
 775                                 // according to some filter rules such as Suhosin's setting for
 776                                 // suhosin.request.max_value_length (d'oh)
 777                                 $this->incompleteForm = true;
 778                         } else {
 779                                 // If we receive the last parameter of the request, we can fairly
 780                                 // claim the POST request has not been truncated.
 781
 782                                 // TODO: softened the check for cutover.  Once we determine
 783                                 // that it is safe, we should complete the transition by
 784                                 // removing the "edittime" clause.
 785                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 786                                         && is_null( $this->edittime ) );
 787                         }
 788                         if ( $this->incompleteForm ) {
 789                                 # If the form is incomplete, force to preview.
 790                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 791                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 792                                 $this->preview = true;
 793                         } else {
 794                                 /* Fallback for live preview */
 795                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 796                                 $this->diff = $request->getCheck( 'wpDiff' );
 797
 798                                 // Remember whether a save was requested, so we can indicate
 799                                 // if we forced preview due to session failure.
 800                                 $this->mTriedSave = !$this->preview;
 801
 802                                 if ( $this->tokenOk( $request ) ) {
 803                                         # Some browsers will not report any submit button
 804                                         # if the user hits enter in the comment box.
 805                                         # The unmarked state will be assumed to be a save,
 806                                         # if the form seems otherwise complete.
 807                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 808                                 } elseif ( $this->diff ) {
 809                                         # Failed token check, but only requested "Show Changes".
 810                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 811                                 } else {
 812                                         # Page might be a hack attempt posted from
 813                                         # an external site. Preview instead of saving.
 814                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 815                                         $this->preview = true;
 816                                 }
 817                         }
 818                         $this->save = !$this->preview && !$this->diff;
 819                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 820                                 $this->edittime = null;
 821                         }
 822
 823                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 824                                 $this->starttime = null;
 825                         }
 826
 827                         $this->recreate = $request->getCheck( 'wpRecreate' );
 828
 829                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 830                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 831
 832                         # Don't force edit summaries when a user is editing their own user or talk page
 833                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 834                                 && $this->mTitle->getText() == $wgUser->getName()
 835                         ) {
 836                                 $this->allowBlankSummary = true;
 837                         } else {
 838                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 839                                         || !$wgUser->getOption( 'forceeditsummary' );
 840                         }
 841
 842                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 843
 844                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 845                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 846                 } else {
 847                         # Not a posted form? Start with nothing.
 848                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 849                         $this->textbox1 = '';
 850                         $this->summary = '';
 851                         $this->sectiontitle = '';
 852                         $this->edittime = '';
 853                         $this->starttime = wfTimestampNow();
 854                         $this->edit = false;
 855                         $this->preview = false;
 856                         $this->save = false;
 857                         $this->diff = false;
 858                         $this->minoredit = false;
 859                         // Watch may be overridden by request parameters
 860                         $this->watchthis = $request->getBool( 'watchthis', false );
 861                         $this->recreate = false;
 862
 863                         // When creating a new section, we can preload a section title by passing it as the
 864                         // preloadtitle parameter in the URL (Bug 13100)
 865                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 866                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 867                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 868                                 $this->summary = $request->getVal( 'preloadtitle' );
 869                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 870                                 $this->summary = $request->getText( 'summary' );
 871                                 if ( $this->summary !== '' ) {
 872                                         $this->hasPresetSummary = true;
 873                                 }
 874                         }
 875
 876                         if ( $request->getVal( 'minor' ) ) {
 877                                 $this->minoredit = true;
 878                         }
 879                 }
 880
 881                 $this->oldid = $request->getInt( 'oldid' );
 882                 $this->parentRevId = $request->getInt( 'parentRevId' );
 883
 884                 $this->bot = $request->getBool( 'bot', true );
 885                 $this->nosummary = $request->getBool( 'nosummary' );
 886
 887                 // May be overridden by revision.
 888                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 889                 // May be overridden by revision.
 890                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 891
 892                 if ( !ContentHandler::getForModelID( $this->contentModel )
 893                         ->isSupportedFormat( $this->contentFormat )
 894                 ) {
 895                         throw new ErrorPageError(
 896                                 'editpage-notsupportedcontentformat-title',
 897                                 'editpage-notsupportedcontentformat-text',
 898                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 899                         );
 900                 }
 901
 902                 /**
 903                  * @todo Check if the desired model is allowed in this namespace, and if
 904                  *   a transition from the page's current model to the new model is
 905                  *   allowed.
 906                  */
 907
 908                 $this->live = $request->getCheck( 'live' );
 909                 $this->editintro = $request->getText( 'editintro',
 910                         // Custom edit intro for new sections
 911                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 912
 913                 // Allow extensions to modify form data
 914                 Hooks::run( 'EditPage::importFormData', array( $this, $request ) );
 915
 916         }
 917
 918         /**
 919          * Subpage overridable method for extracting the page content data from the
 920          * posted form to be placed in $this->textbox1, if using customized input
 921          * this method should be overridden and return the page text that will be used
 922          * for saving, preview parsing and so on...
 923          *
 924          * @param WebRequest $request
 925          */
 926         protected function importContentFormData( &$request ) {
 927                 return; // Don't do anything, EditPage already extracted wpTextbox1
 928         }
 929
 930         /**
 931          * Initialise form fields in the object
 932          * Called on the first invocation, e.g. when a user clicks an edit link
 933          * @return bool If the requested section is valid
 934          */
 935         function initialiseForm() {
 936                 global $wgUser;
 937                 $this->edittime = $this->mArticle->getTimestamp();
 938
 939                 $content = $this->getContentObject( false ); #TODO: track content object?!
 940                 if ( $content === false ) {
 941                         return false;
 942                 }
 943                 $this->textbox1 = $this->toEditText( $content );
 944
 945                 // activate checkboxes if user wants them to be always active
 946                 # Sort out the "watch" checkbox
 947                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 948                         # Watch all edits
 949                         $this->watchthis = true;
 950                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 951                         # Watch creations
 952                         $this->watchthis = true;
 953                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 954                         # Already watched
 955                         $this->watchthis = true;
 956                 }
 957                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 958                         $this->minoredit = true;
 959                 }
 960                 if ( $this->textbox1 === false ) {
 961                         return false;
 962                 }
 963                 return true;
 964         }
 965
 966         /**
 967          * @param Content|null $def_content The default value to return
 968          *
 969          * @return Content|null Content on success, $def_content for invalid sections
 970          *
 971          * @since 1.21
 972          */
 973         protected function getContentObject( $def_content = null ) {
 974                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 975
 976                 $content = false;
 977
 978                 // For message page not locally set, use the i18n message.
 979                 // For other non-existent articles, use preload text if any.
 980                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 981                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 982                                 # If this is a system message, get the default text.
 983                                 $msg = $this->mTitle->getDefaultMessageText();
 984
 985                                 $content = $this->toEditContent( $msg );
 986                         }
 987                         if ( $content === false ) {
 988                                 # If requested, preload some text.
 989                                 $preload = $wgRequest->getVal( 'preload',
 990                                         // Custom preload text for new sections
 991                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 992                                 $params = $wgRequest->getArray( 'preloadparams', array() );
 993
 994                                 $content = $this->getPreloadedContent( $preload, $params );
 995                         }
 996                 // For existing pages, get text based on "undo" or section parameters.
 997                 } else {
 998                         if ( $this->section != '' ) {
 999                                 // Get section edit text (returns $def_text for invalid sections)
1000                                 $orig = $this->getOriginalContent( $wgUser );
1001                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1002
1003                                 if ( !$content ) {
1004                                         $content = $def_content;
1005                                 }
1006                         } else {
1007                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1008                                 $undo = $wgRequest->getInt( 'undo' );
1009
1010                                 if ( $undo > 0 && $undoafter > 0 ) {
1011
1012                                         $undorev = Revision::newFromId( $undo );
1013                                         $oldrev = Revision::newFromId( $undoafter );
1014
1015                                         # Sanity check, make sure it's the right page,
1016                                         # the revisions exist and they were not deleted.
1017                                         # Otherwise, $content will be left as-is.
1018                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1019                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1020                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1021
1022                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1023
1024                                                 if ( $content === false ) {
1025                                                         # Warn the user that something went wrong
1026                                                         $undoMsg = 'failure';
1027                                                 } else {
1028                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1029                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1030                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1031
1032                                                         if ( $newContent->equals( $oldContent ) ) {
1033                                                                 # Tell the user that the undo results in no change,
1034                                                                 # i.e. the revisions were already undone.
1035                                                                 $undoMsg = 'nochange';
1036                                                                 $content = false;
1037                                                         } else {
1038                                                                 # Inform the user of our success and set an automatic edit summary
1039                                                                 $undoMsg = 'success';
1040
1041                                                                 # If we just undid one rev, use an autosummary
1042                                                                 $firstrev = $oldrev->getNext();
1043                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1044                                                                         $userText = $undorev->getUserText();
1045                                                                         if ( $userText === '' ) {
1046                                                                                 $undoSummary = wfMessage(
1047                                                                                         'undo-summary-username-hidden',
1048                                                                                         $undo
1049                                                                                 )->inContentLanguage()->text();
1050                                                                         } else {
1051                                                                                 $undoSummary = wfMessage(
1052                                                                                         'undo-summary',
1053                                                                                         $undo,
1054                                                                                         $userText
1055                                                                                 )->inContentLanguage()->text();
1056                                                                         }
1057                                                                         if ( $this->summary === '' ) {
1058                                                                                 $this->summary = $undoSummary;
1059                                                                         } else {
1060                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1061                                                                                         ->inContentLanguage()->text() . $this->summary;
1062                                                                         }
1063                                                                         $this->undidRev = $undo;
1064                                                                 }
1065                                                                 $this->formtype = 'diff';
1066                                                         }
1067                                                 }
1068                                         } else {
1069                                                 // Failed basic sanity checks.
1070                                                 // Older revisions may have been removed since the link
1071                                                 // was created, or we may simply have got bogus input.
1072                                                 $undoMsg = 'norev';
1073                                         }
1074
1075                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1076                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1077                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1078                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1079                                 }
1080
1081                                 if ( $content === false ) {
1082                                         $content = $this->getOriginalContent( $wgUser );
1083                                 }
1084                         }
1085                 }
1086
1087                 return $content;
1088         }
1089
1090         /**
1091          * Get the content of the wanted revision, without section extraction.
1092          *
1093          * The result of this function can be used to compare user's input with
1094          * section replaced in its context (using WikiPage::replaceSection())
1095          * to the original text of the edit.
1096          *
1097          * This differs from Article::getContent() that when a missing revision is
1098          * encountered the result will be null and not the
1099          * 'missing-revision' message.
1100          *
1101          * @since 1.19
1102          * @param User $user The user to get the revision for
1103          * @return Content|null
1104          */
1105         private function getOriginalContent( User $user ) {
1106                 if ( $this->section == 'new' ) {
1107                         return $this->getCurrentContent();
1108                 }
1109                 $revision = $this->mArticle->getRevisionFetched();
1110                 if ( $revision === null ) {
1111                         if ( !$this->contentModel ) {
1112                                 $this->contentModel = $this->getTitle()->getContentModel();
1113                         }
1114                         $handler = ContentHandler::getForModelID( $this->contentModel );
1115
1116                         return $handler->makeEmptyContent();
1117                 }
1118                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1119                 return $content;
1120         }
1121
1122         /**
1123          * Get the current content of the page. This is basically similar to
1124          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1125          * content object is returned instead of null.
1126          *
1127          * @since 1.21
1128          * @return Content
1129          */
1130         protected function getCurrentContent() {
1131                 $rev = $this->mArticle->getRevision();
1132                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1133
1134                 if ( $content === false || $content === null ) {
1135                         if ( !$this->contentModel ) {
1136                                 $this->contentModel = $this->getTitle()->getContentModel();
1137                         }
1138                         $handler = ContentHandler::getForModelID( $this->contentModel );
1139
1140                         return $handler->makeEmptyContent();
1141                 } else {
1142                         # nasty side-effect, but needed for consistency
1143                         $this->contentModel = $rev->getContentModel();
1144                         $this->contentFormat = $rev->getContentFormat();
1145
1146                         return $content;
1147                 }
1148         }
1149
1150         /**
1151          * Use this method before edit() to preload some content into the edit box
1152          *
1153          * @param Content $content
1154          *
1155          * @since 1.21
1156          */
1157         public function setPreloadedContent( Content $content ) {
1158                 $this->mPreloadContent = $content;
1159         }
1160
1161         /**
1162          * Get the contents to be preloaded into the box, either set by
1163          * an earlier setPreloadText() or by loading the given page.
1164          *
1165          * @param string $preload Representing the title to preload from.
1166          * @param array $params Parameters to use (interface-message style) in the preloaded text
1167          *
1168          * @return Content
1169          *
1170          * @since 1.21
1171          */
1172         protected function getPreloadedContent( $preload, $params = array() ) {
1173                 global $wgUser;
1174
1175                 if ( !empty( $this->mPreloadContent ) ) {
1176                         return $this->mPreloadContent;
1177                 }
1178
1179                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1180
1181                 if ( $preload === '' ) {
1182                         return $handler->makeEmptyContent();
1183                 }
1184
1185                 $title = Title::newFromText( $preload );
1186                 # Check for existence to avoid getting MediaWiki:Noarticletext
1187                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1188                         //TODO: somehow show a warning to the user!
1189                         return $handler->makeEmptyContent();
1190                 }
1191
1192                 $page = WikiPage::factory( $title );
1193                 if ( $page->isRedirect() ) {
1194                         $title = $page->getRedirectTarget();
1195                         # Same as before
1196                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1197                                 //TODO: somehow show a warning to the user!
1198                                 return $handler->makeEmptyContent();
1199                         }
1200                         $page = WikiPage::factory( $title );
1201                 }
1202
1203                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1204                 $content = $page->getContent( Revision::RAW );
1205
1206                 if ( !$content ) {
1207                         //TODO: somehow show a warning to the user!
1208                         return $handler->makeEmptyContent();
1209                 }
1210
1211                 if ( $content->getModel() !== $handler->getModelID() ) {
1212                         $converted = $content->convert( $handler->getModelID() );
1213
1214                         if ( !$converted ) {
1215                                 //TODO: somehow show a warning to the user!
1216                                 wfDebug( "Attempt to preload incompatible content: "
1217                                                 . "can't convert " . $content->getModel()
1218                                                 . " to " . $handler->getModelID() );
1219
1220                                 return $handler->makeEmptyContent();
1221                         }
1222
1223                         $content = $converted;
1224                 }
1225
1226                 return $content->preloadTransform( $title, $parserOptions, $params );
1227         }
1228
1229         /**
1230          * Make sure the form isn't faking a user's credentials.
1231          *
1232          * @param WebRequest $request
1233          * @return bool
1234          * @private
1235          */
1236         function tokenOk( &$request ) {
1237                 global $wgUser;
1238                 $token = $request->getVal( 'wpEditToken' );
1239                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1240                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1241                 return $this->mTokenOk;
1242         }
1243
1244         /**
1245          * Sets post-edit cookie indicating the user just saved a particular revision.
1246          *
1247          * This uses a temporary cookie for each revision ID so separate saves will never
1248          * interfere with each other.
1249          *
1250          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1251          * the redirect.  It must be clearable by JavaScript code, so it must not be
1252          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1253          * variable.
1254          *
1255          * If the variable were set on the server, it would be cached, which is unwanted
1256          * since the post-edit state should only apply to the load right after the save.
1257          *
1258          * @param int $statusValue The status value (to check for new article status)
1259          */
1260         protected function setPostEditCookie( $statusValue ) {
1261                 $revisionId = $this->mArticle->getLatest();
1262                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1263
1264                 $val = 'saved';
1265                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1266                         $val = 'created';
1267                 } elseif ( $this->oldid ) {
1268                         $val = 'restored';
1269                 }
1270
1271                 $response = RequestContext::getMain()->getRequest()->response();
1272                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1273                         'httpOnly' => false,
1274                 ) );
1275         }
1276
1277         /**
1278          * Attempt submission
1279          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1280          * @return bool False if output is done, true if the rest of the form should be displayed
1281          */
1282         public function attemptSave() {
1283                 global $wgUser;
1284
1285                 $resultDetails = false;
1286                 # Allow bots to exempt some edits from bot flagging
1287                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1288                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1289
1290                 return $this->handleStatus( $status, $resultDetails );
1291         }
1292
1293         /**
1294          * Handle status, such as after attempt save
1295          *
1296          * @param Status $status
1297          * @param array|bool $resultDetails
1298          *
1299          * @throws ErrorPageError
1300          * @return bool False, if output is done, true if rest of the form should be displayed
1301          */
1302         private function handleStatus( Status $status, $resultDetails ) {
1303                 global $wgUser, $wgOut;
1304
1305                 /**
1306                  * @todo FIXME: once the interface for internalAttemptSave() is made
1307                  *   nicer, this should use the message in $status
1308                  */
1309                 if ( $status->value == self::AS_SUCCESS_UPDATE
1310                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1311                 ) {
1312                         $this->didSave = true;
1313                         if ( !$resultDetails['nullEdit'] ) {
1314                                 $this->setPostEditCookie( $status->value );
1315                         }
1316                 }
1317
1318                 switch ( $status->value ) {
1319                         case self::AS_HOOK_ERROR_EXPECTED:
1320                         case self::AS_CONTENT_TOO_BIG:
1321                         case self::AS_ARTICLE_WAS_DELETED:
1322                         case self::AS_CONFLICT_DETECTED:
1323                         case self::AS_SUMMARY_NEEDED:
1324                         case self::AS_TEXTBOX_EMPTY:
1325                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1326                         case self::AS_END:
1327                         case self::AS_BLANK_ARTICLE:
1328                         case self::AS_SELF_REDIRECT:
1329                                 return true;
1330
1331                         case self::AS_HOOK_ERROR:
1332                                 return false;
1333
1334                         case self::AS_PARSE_ERROR:
1335                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1336                                 return true;
1337
1338                         case self::AS_SUCCESS_NEW_ARTICLE:
1339                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1340                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1341                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1342                                 return false;
1343
1344                         case self::AS_SUCCESS_UPDATE:
1345                                 $extraQuery = '';
1346                                 $sectionanchor = $resultDetails['sectionanchor'];
1347
1348                                 // Give extensions a chance to modify URL query on update
1349                                 Hooks::run(
1350                                         'ArticleUpdateBeforeRedirect',
1351                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1352                                 );
1353
1354                                 if ( $resultDetails['redirect'] ) {
1355                                         if ( $extraQuery == '' ) {
1356                                                 $extraQuery = 'redirect=no';
1357                                         } else {
1358                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1359                                         }
1360                                 }
1361                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1362                                 return false;
1363
1364                         case self::AS_SPAM_ERROR:
1365                                 $this->spamPageWithContent( $resultDetails['spam'] );
1366                                 return false;
1367
1368                         case self::AS_BLOCKED_PAGE_FOR_USER:
1369                                 throw new UserBlockedError( $wgUser->getBlock() );
1370
1371                         case self::AS_IMAGE_REDIRECT_ANON:
1372                         case self::AS_IMAGE_REDIRECT_LOGGED:
1373                                 throw new PermissionsError( 'upload' );
1374
1375                         case self::AS_READ_ONLY_PAGE_ANON:
1376                         case self::AS_READ_ONLY_PAGE_LOGGED:
1377                                 throw new PermissionsError( 'edit' );
1378
1379                         case self::AS_READ_ONLY_PAGE:
1380                                 throw new ReadOnlyError;
1381
1382                         case self::AS_RATE_LIMITED:
1383                                 throw new ThrottledError();
1384
1385                         case self::AS_NO_CREATE_PERMISSION:
1386                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1387                                 throw new PermissionsError( $permission );
1388
1389                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1390                                 throw new PermissionsError( 'editcontentmodel' );
1391
1392                         default:
1393                                 // We don't recognize $status->value. The only way that can happen
1394                                 // is if an extension hook aborted from inside ArticleSave.
1395                                 // Render the status object into $this->hookError
1396                                 // FIXME this sucks, we should just use the Status object throughout
1397                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1398                                         '</div>';
1399                                 return true;
1400                 }
1401         }
1402
1403         /**
1404          * Run hooks that can filter edits just before they get saved.
1405          *
1406          * @param Content $content The Content to filter.
1407          * @param Status $status For reporting the outcome to the caller
1408          * @param User $user The user performing the edit
1409          *
1410          * @return bool
1411          */
1412         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1413                 // Run old style post-section-merge edit filter
1414                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1415                         array( $this, $content, &$this->hookError, $this->summary ) )
1416                 ) {
1417                         # Error messages etc. could be handled within the hook...
1418                         $status->fatal( 'hookaborted' );
1419                         $status->value = self::AS_HOOK_ERROR;
1420                         return false;
1421                 } elseif ( $this->hookError != '' ) {
1422                         # ...or the hook could be expecting us to produce an error
1423                         $status->fatal( 'hookaborted' );
1424                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1425                         return false;
1426                 }
1427
1428                 // Run new style post-section-merge edit filter
1429                 if ( !Hooks::run( 'EditFilterMergedContent',
1430                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1431                                 $user, $this->minoredit ) )
1432                 ) {
1433                         # Error messages etc. could be handled within the hook...
1434                         if ( $status->isGood() ) {
1435                                 $status->fatal( 'hookaborted' );
1436                                 // Not setting $this->hookError here is a hack to allow the hook
1437                                 // to cause a return to the edit page without $this->hookError
1438                                 // being set. This is used by ConfirmEdit to display a captcha
1439                                 // without any error message cruft.
1440                         } else {
1441                                 $this->hookError = $status->getWikiText();
1442                         }
1443                         // Use the existing $status->value if the hook set it
1444                         if ( !$status->value ) {
1445                                 $status->value = self::AS_HOOK_ERROR;
1446                         }
1447                         return false;
1448                 } elseif ( !$status->isOK() ) {
1449                         # ...or the hook could be expecting us to produce an error
1450                         // FIXME this sucks, we should just use the Status object throughout
1451                         $this->hookError = $status->getWikiText();
1452                         $status->fatal( 'hookaborted' );
1453                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1454                         return false;
1455                 }
1456
1457                 return true;
1458         }
1459
1460         /**
1461          * Return the summary to be used for a new section.
1462          *
1463          * @param string $sectionanchor Set to the section anchor text
1464          * @return string
1465          */
1466         private function newSectionSummary( &$sectionanchor = null ) {
1467                 global $wgParser;
1468
1469                 if ( $this->sectiontitle !== '' ) {
1470                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1471                         // If no edit summary was specified, create one automatically from the section
1472                         // title and have it link to the new section. Otherwise, respect the summary as
1473                         // passed.
1474                         if ( $this->summary === '' ) {
1475                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1476                                 return wfMessage( 'newsectionsummary' )
1477                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1478                         }
1479                 } elseif ( $this->summary !== '' ) {
1480                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1481                         # This is a new section, so create a link to the new section
1482                         # in the revision summary.
1483                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1484                         return wfMessage( 'newsectionsummary' )
1485                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1486                 }
1487                 return $this->summary;
1488         }
1489
1490         /**
1491          * Attempt submission (no UI)
1492          *
1493          * @param array $result Array to add statuses to, currently with the
1494          *   possible keys:
1495          *   - spam (string): Spam string from content if any spam is detected by
1496          *     matchSpamRegex.
1497          *   - sectionanchor (string): Section anchor for a section save.
1498          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1499          *     false otherwise.
1500          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1501          *     revision is a redirect.
1502          * @param bool $bot True if edit is being made under the bot right.
1503          *
1504          * @return Status Status object, possibly with a message, but always with
1505          *   one of the AS_* constants in $status->value,
1506          *
1507          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1508          *   various error display idiosyncrasies. There are also lots of cases
1509          *   where error metadata is set in the object and retrieved later instead
1510          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1511          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1512          * time.
1513          */
1514         function internalAttemptSave( &$result, $bot = false ) {
1515                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1516
1517                 $status = Status::newGood();
1518
1519                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1520                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1521                         $status->fatal( 'hookaborted' );
1522                         $status->value = self::AS_HOOK_ERROR;
1523                         return $status;
1524                 }
1525
1526                 $spam = $wgRequest->getText( 'wpAntispam' );
1527                 if ( $spam !== '' ) {
1528                         wfDebugLog(
1529                                 'SimpleAntiSpam',
1530                                 $wgUser->getName() .
1531                                 ' editing "' .
1532                                 $this->mTitle->getPrefixedText() .
1533                                 '" submitted bogus field "' .
1534                                 $spam .
1535                                 '"'
1536                         );
1537                         $status->fatal( 'spamprotectionmatch', false );
1538                         $status->value = self::AS_SPAM_ERROR;
1539                         return $status;
1540                 }
1541
1542                 try {
1543                         # Construct Content object
1544                         $textbox_content = $this->toEditContent( $this->textbox1 );
1545                 } catch ( MWContentSerializationException $ex ) {
1546                         $status->fatal(
1547                                 'content-failed-to-parse',
1548                                 $this->contentModel,
1549                                 $this->contentFormat,
1550                                 $ex->getMessage()
1551                         );
1552                         $status->value = self::AS_PARSE_ERROR;
1553                         return $status;
1554                 }
1555
1556                 # Check image redirect
1557                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1558                         $textbox_content->isRedirect() &&
1559                         !$wgUser->isAllowed( 'upload' )
1560                 ) {
1561                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1562                                 $status->setResult( false, $code );
1563
1564                                 return $status;
1565                 }
1566
1567                 # Check for spam
1568                 $match = self::matchSummarySpamRegex( $this->summary );
1569                 if ( $match === false && $this->section == 'new' ) {
1570                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1571                         # regular summaries, it is added to the actual wikitext.
1572                         if ( $this->sectiontitle !== '' ) {
1573                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1574                                 $match = self::matchSpamRegex( $this->sectiontitle );
1575                         } else {
1576                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1577                                 # is used with the 'summary' parameter.
1578                                 $match = self::matchSpamRegex( $this->summary );
1579                         }
1580                 }
1581                 if ( $match === false ) {
1582                         $match = self::matchSpamRegex( $this->textbox1 );
1583                 }
1584                 if ( $match !== false ) {
1585                         $result['spam'] = $match;
1586                         $ip = $wgRequest->getIP();
1587                         $pdbk = $this->mTitle->getPrefixedDBkey();
1588                         $match = str_replace( "\n", '', $match );
1589                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1590                         $status->fatal( 'spamprotectionmatch', $match );
1591                         $status->value = self::AS_SPAM_ERROR;
1592                         return $status;
1593                 }
1594                 if ( !Hooks::run(
1595                         'EditFilter',
1596                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1597                 ) {
1598                         # Error messages etc. could be handled within the hook...
1599                         $status->fatal( 'hookaborted' );
1600                         $status->value = self::AS_HOOK_ERROR;
1601                         return $status;
1602                 } elseif ( $this->hookError != '' ) {
1603                         # ...or the hook could be expecting us to produce an error
1604                         $status->fatal( 'hookaborted' );
1605                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1606                         return $status;
1607                 }
1608
1609                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1610                         // Auto-block user's IP if the account was "hard" blocked
1611                         $wgUser->spreadAnyEditBlock();
1612                         # Check block state against master, thus 'false'.
1613                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1614                         return $status;
1615                 }
1616
1617                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1618                 if ( $this->kblength > $wgMaxArticleSize ) {
1619                         // Error will be displayed by showEditForm()
1620                         $this->tooBig = true;
1621                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1622                         return $status;
1623                 }
1624
1625                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1626                         if ( $wgUser->isAnon() ) {
1627                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1628                                 return $status;
1629                         } else {
1630                                 $status->fatal( 'readonlytext' );
1631                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1632                                 return $status;
1633                         }
1634                 }
1635
1636                 if ( $this->contentModel !== $this->mTitle->getContentModel()
1637                         && !$wgUser->isAllowed( 'editcontentmodel' )
1638                 ) {
1639                         $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1640                         return $status;
1641                 }
1642
1643                 if ( wfReadOnly() ) {
1644                         $status->fatal( 'readonlytext' );
1645                         $status->value = self::AS_READ_ONLY_PAGE;
1646                         return $status;
1647                 }
1648                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1649                         $status->fatal( 'actionthrottledtext' );
1650                         $status->value = self::AS_RATE_LIMITED;
1651                         return $status;
1652                 }
1653
1654                 # If the article has been deleted while editing, don't save it without
1655                 # confirmation
1656                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1657                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1658                         return $status;
1659                 }
1660
1661                 # Load the page data from the master. If anything changes in the meantime,
1662                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1663                 $this->mArticle->loadPageData( 'fromdbmaster' );
1664                 $new = !$this->mArticle->exists();
1665
1666                 if ( $new ) {
1667                         // Late check for create permission, just in case *PARANOIA*
1668                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1669                                 $status->fatal( 'nocreatetext' );
1670                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1671                                 wfDebug( __METHOD__ . ": no create permission\n" );
1672                                 return $status;
1673                         }
1674
1675                         // Don't save a new page if it's blank or if it's a MediaWiki:
1676                         // message with content equivalent to default (allow empty pages
1677                         // in this case to disable messages, see bug 50124)
1678                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1679                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1680                                 $defaultText = $defaultMessageText;
1681                         } else {
1682                                 $defaultText = '';
1683                         }
1684
1685                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1686                                 $this->blankArticle = true;
1687                                 $status->fatal( 'blankarticle' );
1688                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1689                                 return $status;
1690                         }
1691
1692                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1693                                 return $status;
1694                         }
1695
1696                         $content = $textbox_content;
1697
1698                         $result['sectionanchor'] = '';
1699                         if ( $this->section == 'new' ) {
1700                                 if ( $this->sectiontitle !== '' ) {
1701                                         // Insert the section title above the content.
1702                                         $content = $content->addSectionHeader( $this->sectiontitle );
1703                                 } elseif ( $this->summary !== '' ) {
1704                                         // Insert the section title above the content.
1705                                         $content = $content->addSectionHeader( $this->summary );
1706                                 }
1707                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1708                         }
1709
1710                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1711
1712                 } else { # not $new
1713
1714                         # Article exists. Check for edit conflict.
1715
1716                         $this->mArticle->clear(); # Force reload of dates, etc.
1717                         $timestamp = $this->mArticle->getTimestamp();
1718
1719                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1720
1721                         if ( $timestamp != $this->edittime ) {
1722                                 $this->isConflict = true;
1723                                 if ( $this->section == 'new' ) {
1724                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1725                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1726                                         ) {
1727                                                 // Probably a duplicate submission of a new comment.
1728                                                 // This can happen when squid resends a request after
1729                                                 // a timeout but the first one actually went through.
1730                                                 wfDebug( __METHOD__
1731                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1732                                         } else {
1733                                                 // New comment; suppress conflict.
1734                                                 $this->isConflict = false;
1735                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1736                                         }
1737                                 } elseif ( $this->section == ''
1738                                         && Revision::userWasLastToEdit(
1739                                                 DB_MASTER, $this->mTitle->getArticleID(),
1740                                                 $wgUser->getId(), $this->edittime
1741                                         )
1742                                 ) {
1743                                         # Suppress edit conflict with self, except for section edits where merging is required.
1744                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1745                                         $this->isConflict = false;
1746                                 }
1747                         }
1748
1749                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1750                         if ( $this->sectiontitle !== '' ) {
1751                                 $sectionTitle = $this->sectiontitle;
1752                         } else {
1753                                 $sectionTitle = $this->summary;
1754                         }
1755
1756                         $content = null;
1757
1758                         if ( $this->isConflict ) {
1759                                 wfDebug( __METHOD__
1760                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1761                                         . " (article time '{$timestamp}')\n" );
1762
1763                                 $content = $this->mArticle->replaceSectionContent(
1764                                         $this->section,
1765                                         $textbox_content,
1766                                         $sectionTitle,
1767                                         $this->edittime
1768                                 );
1769                         } else {
1770                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1771                                 $content = $this->mArticle->replaceSectionContent(
1772                                         $this->section,
1773                                         $textbox_content,
1774                                         $sectionTitle
1775                                 );
1776                         }
1777
1778                         if ( is_null( $content ) ) {
1779                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1780                                 $this->isConflict = true;
1781                                 $content = $textbox_content; // do not try to merge here!
1782                         } elseif ( $this->isConflict ) {
1783                                 # Attempt merge
1784                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1785                                         // Successful merge! Maybe we should tell the user the good news?
1786                                         $this->isConflict = false;
1787                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1788                                 } else {
1789                                         $this->section = '';
1790                                         $this->textbox1 = ContentHandler::getContentText( $content );
1791                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1792                                 }
1793                         }
1794
1795                         if ( $this->isConflict ) {
1796                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1797                                 return $status;
1798                         }
1799
1800                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1801                                 return $status;
1802                         }
1803
1804                         if ( $this->section == 'new' ) {
1805                                 // Handle the user preference to force summaries here
1806                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1807                                         $this->missingSummary = true;
1808                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1809                                         $status->value = self::AS_SUMMARY_NEEDED;
1810                                         return $status;
1811                                 }
1812
1813                                 // Do not allow the user to post an empty comment
1814                                 if ( $this->textbox1 == '' ) {
1815                                         $this->missingComment = true;
1816                                         $status->fatal( 'missingcommenttext' );
1817                                         $status->value = self::AS_TEXTBOX_EMPTY;
1818                                         return $status;
1819                                 }
1820                         } elseif ( !$this->allowBlankSummary
1821                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1822                                 && !$content->isRedirect()
1823                                 && md5( $this->summary ) == $this->autoSumm
1824                         ) {
1825                                 $this->missingSummary = true;
1826                                 $status->fatal( 'missingsummary' );
1827                                 $status->value = self::AS_SUMMARY_NEEDED;
1828                                 return $status;
1829                         }
1830
1831                         # All's well
1832                         $sectionanchor = '';
1833                         if ( $this->section == 'new' ) {
1834                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1835                         } elseif ( $this->section != '' ) {
1836                                 # Try to get a section anchor from the section source, redirect
1837                                 # to edited section if header found.
1838                                 # XXX: Might be better to integrate this into Article::replaceSection
1839                                 # for duplicate heading checking and maybe parsing.
1840                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1841                                 # We can't deal with anchors, includes, html etc in the header for now,
1842                                 # headline would need to be parsed to improve this.
1843                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1844                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1845                                 }
1846                         }
1847                         $result['sectionanchor'] = $sectionanchor;
1848
1849                         // Save errors may fall down to the edit form, but we've now
1850                         // merged the section into full text. Clear the section field
1851                         // so that later submission of conflict forms won't try to
1852                         // replace that into a duplicated mess.
1853                         $this->textbox1 = $this->toEditText( $content );
1854                         $this->section = '';
1855
1856                         $status->value = self::AS_SUCCESS_UPDATE;
1857                 }
1858
1859                 if ( !$this->allowSelfRedirect
1860                         && $content->isRedirect()
1861                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1862                 ) {
1863                         // If the page already redirects to itself, don't warn.
1864                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1865                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1866                                 $this->selfRedirect = true;
1867                                 $status->fatal( 'selfredirect' );
1868                                 $status->value = self::AS_SELF_REDIRECT;
1869                                 return $status;
1870                         }
1871                 }
1872
1873                 // Check for length errors again now that the section is merged in
1874                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1875                 if ( $this->kblength > $wgMaxArticleSize ) {
1876                         $this->tooBig = true;
1877                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1878                         return $status;
1879                 }
1880
1881                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1882                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1883                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1884                         ( $bot ? EDIT_FORCE_BOT : 0 );
1885
1886                 $doEditStatus = $this->mArticle->doEditContent(
1887                         $content,
1888                         $this->summary,
1889                         $flags,
1890                         false,
1891                         null,
1892                         $content->getDefaultFormat()
1893                 );
1894
1895                 if ( !$doEditStatus->isOK() ) {
1896                         // Failure from doEdit()
1897                         // Show the edit conflict page for certain recognized errors from doEdit(),
1898                         // but don't show it for errors from extension hooks
1899                         $errors = $doEditStatus->getErrorsArray();
1900                         if ( in_array( $errors[0][0],
1901                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1902                         ) {
1903                                 $this->isConflict = true;
1904                                 // Destroys data doEdit() put in $status->value but who cares
1905                                 $doEditStatus->value = self::AS_END;
1906                         }
1907                         return $doEditStatus;
1908                 }
1909
1910                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1911                 if ( $result['nullEdit'] ) {
1912                         // We don't know if it was a null edit until now, so increment here
1913                         $wgUser->pingLimiter( 'linkpurge' );
1914                 }
1915                 $result['redirect'] = $content->isRedirect();
1916                 $this->updateWatchlist();
1917                 return $status;
1918         }
1919
1920         /**
1921          * Register the change of watch status
1922          */
1923         protected function updateWatchlist() {
1924                 global $wgUser;
1925
1926                 if ( $wgUser->isLoggedIn()
1927                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1928                 ) {
1929                         $fname = __METHOD__;
1930                         $title = $this->mTitle;
1931                         $watch = $this->watchthis;
1932
1933                         // Do this in its own transaction to reduce contention...
1934                         $dbw = wfGetDB( DB_MASTER );
1935                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1936                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1937                         } );
1938                 }
1939         }
1940
1941         /**
1942          * Attempts to do 3-way merge of edit content with a base revision
1943          * and current content, in case of edit conflict, in whichever way appropriate
1944          * for the content type.
1945          *
1946          * @since 1.21
1947          *
1948          * @param Content $editContent
1949          *
1950          * @return bool
1951          */
1952         private function mergeChangesIntoContent( &$editContent ) {
1953
1954                 $db = wfGetDB( DB_MASTER );
1955
1956                 // This is the revision the editor started from
1957                 $baseRevision = $this->getBaseRevision();
1958                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1959
1960                 if ( is_null( $baseContent ) ) {
1961                         return false;
1962                 }
1963
1964                 // The current state, we want to merge updates into it
1965                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1966                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1967
1968                 if ( is_null( $currentContent ) ) {
1969                         return false;
1970                 }
1971
1972                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1973
1974                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1975
1976                 if ( $result ) {
1977                         $editContent = $result;
1978                         return true;
1979                 }
1980
1981                 return false;
1982         }
1983
1984         /**
1985          * @return Revision
1986          */
1987         function getBaseRevision() {
1988                 if ( !$this->mBaseRevision ) {
1989                         $db = wfGetDB( DB_MASTER );
1990                         $this->mBaseRevision = Revision::loadFromTimestamp(
1991                                 $db, $this->mTitle, $this->edittime );
1992                 }
1993                 return $this->mBaseRevision;
1994         }
1995
1996         /**
1997          * Check given input text against $wgSpamRegex, and return the text of the first match.
1998          *
1999          * @param string $text
2000          *
2001          * @return string|bool Matching string or false
2002          */
2003         public static function matchSpamRegex( $text ) {
2004                 global $wgSpamRegex;
2005                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2006                 $regexes = (array)$wgSpamRegex;
2007                 return self::matchSpamRegexInternal( $text, $regexes );
2008         }
2009
2010         /**
2011          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2012          *
2013          * @param string $text
2014          *
2015          * @return string|bool Matching string or false
2016          */
2017         public static function matchSummarySpamRegex( $text ) {
2018                 global $wgSummarySpamRegex;
2019                 $regexes = (array)$wgSummarySpamRegex;
2020                 return self::matchSpamRegexInternal( $text, $regexes );
2021         }
2022
2023         /**
2024          * @param string $text
2025          * @param array $regexes
2026          * @return bool|string
2027          */
2028         protected static function matchSpamRegexInternal( $text, $regexes ) {
2029                 foreach ( $regexes as $regex ) {
2030                         $matches = array();
2031                         if ( preg_match( $regex, $text, $matches ) ) {
2032                                 return $matches[0];
2033                         }
2034                 }
2035                 return false;
2036         }
2037
2038         function setHeaders() {
2039                 global $wgOut, $wgUser, $wgAjaxEditStash;
2040
2041                 $wgOut->addModules( 'mediawiki.action.edit' );
2042                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2043
2044                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2045                         // The addition of default buttons is handled by getEditToolbar() which
2046                         // has its own dependency on this module. The call here ensures the module
2047                         // is loaded in time (it has position "top") for other modules to register
2048                         // buttons (e.g. extensions, gadgets, user scripts).
2049                         $wgOut->addModules( 'mediawiki.toolbar' );
2050                 }
2051
2052                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2053                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2054                 }
2055
2056                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2057                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2058                 }
2059
2060                 if ( $wgAjaxEditStash ) {
2061                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2062                 }
2063
2064                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2065
2066                 # Enabled article-related sidebar, toplinks, etc.
2067                 $wgOut->setArticleRelated( true );
2068
2069                 $contextTitle = $this->getContextTitle();
2070                 if ( $this->isConflict ) {
2071                         $msg = 'editconflict';
2072                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2073                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2074                 } else {
2075                         $msg = $contextTitle->exists()
2076                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2077                                         && $contextTitle->getDefaultMessageText() !== false
2078                                 )
2079                                 ? 'editing'
2080                                 : 'creating';
2081                 }
2082
2083                 # Use the title defined by DISPLAYTITLE magic word when present
2084                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2085                 if ( $displayTitle === false ) {
2086                         $displayTitle = $contextTitle->getPrefixedText();
2087                 }
2088                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2089         }
2090
2091         /**
2092          * Show all applicable editing introductions
2093          */
2094         protected function showIntro() {
2095                 global $wgOut, $wgUser;
2096                 if ( $this->suppressIntro ) {
2097                         return;
2098                 }
2099
2100                 $namespace = $this->mTitle->getNamespace();
2101
2102                 if ( $namespace == NS_MEDIAWIKI ) {
2103                         # Show a warning if editing an interface message
2104                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2105                         # If this is a default message (but not css or js),
2106                         # show a hint that it is translatable on translatewiki.net
2107                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2108                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2109                         ) {
2110                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2111                                 if ( $defaultMessageText !== false ) {
2112                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2113                                                 'translateinterface' );
2114                                 }
2115                         }
2116                 } elseif ( $namespace == NS_FILE ) {
2117                         # Show a hint to shared repo
2118                         $file = wfFindFile( $this->mTitle );
2119                         if ( $file && !$file->isLocal() ) {
2120                                 $descUrl = $file->getDescriptionUrl();
2121                                 # there must be a description url to show a hint to shared repo
2122                                 if ( $descUrl ) {
2123                                         if ( !$this->mTitle->exists() ) {
2124                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2125                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2126                                                 ) );
2127                                         } else {
2128                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2129                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2130                                                 ) );
2131                                         }
2132                                 }
2133                         }
2134                 }
2135
2136                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2137                 # Show log extract when the user is currently blocked
2138                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2139                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2140                         $username = $parts[0];
2141                         $user = User::newFromName( $username, false /* allow IP users*/ );
2142                         $ip = User::isIP( $username );
2143                         $block = Block::newFromTarget( $user, $user );
2144                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2145                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2146                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2147                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2148                                 # Show log extract if the user is currently blocked
2149                                 LogEventsList::showLogExtract(
2150                                         $wgOut,
2151                                         'block',
2152                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2153                                         '',
2154                                         array(
2155                                                 'lim' => 1,
2156                                                 'showIfEmpty' => false,
2157                                                 'msgKey' => array(
2158                                                         'blocked-notice-logextract',
2159                                                         $user->getName() # Support GENDER in notice
2160                                                 )
2161                                         )
2162                                 );
2163                         }
2164                 }
2165                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2166                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2167                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2168                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2169                         ) );
2170                         if ( $wgUser->isLoggedIn() ) {
2171                                 $wgOut->wrapWikiMsg(
2172                                         // Suppress the external link icon, consider the help url an internal one
2173                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2174                                         array(
2175                                                 'newarticletext',
2176                                                 $helpLink
2177                                         )
2178                                 );
2179                         } else {
2180                                 $wgOut->wrapWikiMsg(
2181                                         // Suppress the external link icon, consider the help url an internal one
2182                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2183                                         array(
2184                                                 'newarticletextanon',
2185                                                 $helpLink
2186                                         )
2187                                 );
2188                         }
2189                 }
2190                 # Give a notice if the user is editing a deleted/moved page...
2191                 if ( !$this->mTitle->exists() ) {
2192                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2193                                 '',
2194                                 array(
2195                                         'lim' => 10,
2196                                         'conds' => array( "log_action != 'revision'" ),
2197                                         'showIfEmpty' => false,
2198                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2199                                 )
2200                         );
2201                 }
2202         }
2203
2204         /**
2205          * Attempt to show a custom editing introduction, if supplied
2206          *
2207          * @return bool
2208          */
2209         protected function showCustomIntro() {
2210                 if ( $this->editintro ) {
2211                         $title = Title::newFromText( $this->editintro );
2212                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2213                                 global $wgOut;
2214                                 // Added using template syntax, to take <noinclude>'s into account.
2215                                 $wgOut->addWikiTextTitleTidy(
2216                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2217                                         $this->mTitle
2218                                 );
2219                                 return true;
2220                         }
2221                 }
2222                 return false;
2223         }
2224
2225         /**
2226          * Gets an editable textual representation of $content.
2227          * The textual representation can be turned by into a Content object by the
2228          * toEditContent() method.
2229          *
2230          * If $content is null or false or a string, $content is returned unchanged.
2231          *
2232          * If the given Content object is not of a type that can be edited using
2233          * the text base EditPage, an exception will be raised. Set
2234          * $this->allowNonTextContent to true to allow editing of non-textual
2235          * content.
2236          *
2237          * @param Content|null|bool|string $content
2238          * @return string The editable text form of the content.
2239          *
2240          * @throws MWException If $content is not an instance of TextContent and
2241          *   $this->allowNonTextContent is not true.
2242          */
2243         protected function toEditText( $content ) {
2244                 if ( $content === null || $content === false || is_string( $content ) ) {
2245                         return $content;
2246                 }
2247
2248                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2249                         throw new MWException( 'This content model is not supported: '
2250                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2251                 }
2252
2253                 return $content->serialize( $this->contentFormat );
2254         }
2255
2256         /**
2257          * Turns the given text into a Content object by unserializing it.
2258          *
2259          * If the resulting Content object is not of a type that can be edited using
2260          * the text base EditPage, an exception will be raised. Set
2261          * $this->allowNonTextContent to true to allow editing of non-textual
2262          * content.
2263          *
2264          * @param string|null|bool $text Text to unserialize
2265          * @return Content The content object created from $text. If $text was false
2266          *   or null, false resp. null will be  returned instead.
2267          *
2268          * @throws MWException If unserializing the text results in a Content
2269          *   object that is not an instance of TextContent and
2270          *   $this->allowNonTextContent is not true.
2271          */
2272         protected function toEditContent( $text ) {
2273                 if ( $text === false || $text === null ) {
2274                         return $text;
2275                 }
2276
2277                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2278                         $this->contentModel, $this->contentFormat );
2279
2280                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2281                         throw new MWException( 'This content model is not supported: '
2282                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2283                 }
2284
2285                 return $content;
2286         }
2287
2288         /**
2289          * Send the edit form and related headers to $wgOut
2290          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2291          *     during form output near the top, for captchas and the like.
2292          *
2293          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2294          * use the EditPage::showEditForm:fields hook instead.
2295          */
2296         function showEditForm( $formCallback = null ) {
2297                 global $wgOut, $wgUser;
2298
2299                 # need to parse the preview early so that we know which templates are used,
2300                 # otherwise users with "show preview after edit box" will get a blank list
2301                 # we parse this near the beginning so that setHeaders can do the title
2302                 # setting work instead of leaving it in getPreviewText
2303                 $previewOutput = '';
2304                 if ( $this->formtype == 'preview' ) {
2305                         $previewOutput = $this->getPreviewText();
2306                 }
2307
2308                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2309
2310                 $this->setHeaders();
2311
2312                 if ( $this->showHeader() === false ) {
2313                         return;
2314                 }
2315
2316                 $wgOut->addHTML( $this->editFormPageTop );
2317
2318                 if ( $wgUser->getOption( 'previewontop' ) ) {
2319                         $this->displayPreviewArea( $previewOutput, true );
2320                 }
2321
2322                 $wgOut->addHTML( $this->editFormTextTop );
2323
2324                 $showToolbar = true;
2325                 if ( $this->wasDeletedSinceLastEdit() ) {
2326                         if ( $this->formtype == 'save' ) {
2327                                 // Hide the toolbar and edit area, user can click preview to get it back
2328                                 // Add an confirmation checkbox and explanation.
2329                                 $showToolbar = false;
2330                         } else {
2331                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2332                                         'deletedwhileediting' );
2333                         }
2334                 }
2335
2336                 // @todo add EditForm plugin interface and use it here!
2337                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2338                 $wgOut->addHTML( Html::openElement(
2339                         'form',
2340                         array(
2341                                 'id' => self::EDITFORM_ID,
2342                                 'name' => self::EDITFORM_ID,
2343                                 'method' => 'post',
2344                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2345                                 'enctype' => 'multipart/form-data'
2346                         )
2347                 ) );
2348
2349                 if ( is_callable( $formCallback ) ) {
2350                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2351                         call_user_func_array( $formCallback, array( &$wgOut ) );
2352                 }
2353
2354                 // Add an empty field to trip up spambots
2355                 $wgOut->addHTML(
2356                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2357                         . Html::rawElement(
2358                                 'label',
2359                                 array( 'for' => 'wpAntiSpam' ),
2360                                 wfMessage( 'simpleantispam-label' )->parse()
2361                         )
2362                         . Xml::element(
2363                                 'input',
2364                                 array(
2365                                         'type' => 'text',
2366                                         'name' => 'wpAntispam',
2367                                         'id' => 'wpAntispam',
2368                                         'value' => ''
2369                                 )
2370                         )
2371                         . Xml::closeElement( 'div' )
2372                 );
2373
2374                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2375
2376                 // Put these up at the top to ensure they aren't lost on early form submission
2377                 $this->showFormBeforeText();
2378
2379                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2380                         $username = $this->lastDelete->user_name;
2381                         $comment = $this->lastDelete->log_comment;
2382
2383                         // It is better to not parse the comment at all than to have templates expanded in the middle
2384                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2385                         $key = $comment === ''
2386                                 ? 'confirmrecreate-noreason'
2387                                 : 'confirmrecreate';
2388                         $wgOut->addHTML(
2389                                 '<div class="mw-confirm-recreate">' .
2390                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2391                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2392                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2393                                 ) .
2394                                 '</div>'
2395                         );
2396                 }
2397
2398                 # When the summary is hidden, also hide them on preview/show changes
2399                 if ( $this->nosummary ) {
2400                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2401                 }
2402
2403                 # If a blank edit summary was previously provided, and the appropriate
2404                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2405                 # user being bounced back more than once in the event that a summary
2406                 # is not required.
2407                 #####
2408                 # For a bit more sophisticated detection of blank summaries, hash the
2409                 # automatic one and pass that in the hidden field wpAutoSummary.
2410                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2411                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2412                 }
2413
2414                 if ( $this->undidRev ) {
2415                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2416                 }
2417
2418                 if ( $this->selfRedirect ) {
2419                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2420                 }
2421
2422                 if ( $this->hasPresetSummary ) {
2423                         // If a summary has been preset using &summary= we don't want to prompt for
2424                         // a different summary. Only prompt for a summary if the summary is blanked.
2425                         // (Bug 17416)
2426                         $this->autoSumm = md5( '' );
2427                 }
2428
2429                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2430                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2431
2432                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2433                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2434                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2435
2436                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2437                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2438
2439                 if ( $this->section == 'new' ) {
2440                         $this->showSummaryInput( true, $this->summary );
2441                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2442                 }
2443
2444                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2445
2446                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2447                         $wgOut->addHTML( EditPage::getEditToolbar() );
2448                 }
2449
2450                 if ( $this->blankArticle ) {
2451                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2452                 }
2453
2454                 if ( $this->isConflict ) {
2455                         // In an edit conflict bypass the overridable content form method
2456                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2457                         // resolved between page source edits and custom ui edits using the
2458                         // custom edit ui.
2459                         $this->textbox2 = $this->textbox1;
2460
2461                         $content = $this->getCurrentContent();
2462                         $this->textbox1 = $this->toEditText( $content );
2463
2464                         $this->showTextbox1();
2465                 } else {
2466                         $this->showContentForm();
2467                 }
2468
2469                 $wgOut->addHTML( $this->editFormTextAfterContent );
2470
2471                 $this->showStandardInputs();
2472
2473                 $this->showFormAfterText();
2474
2475                 $this->showTosSummary();
2476
2477                 $this->showEditTools();
2478
2479                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2480
2481                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2482                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2483
2484                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2485                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2486
2487                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2488                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2489
2490                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2491
2492                 if ( $this->isConflict ) {
2493                         try {
2494                                 $this->showConflict();
2495                         } catch ( MWContentSerializationException $ex ) {
2496                                 // this can't really happen, but be nice if it does.
2497                                 $msg = wfMessage(
2498                                         'content-failed-to-parse',
2499                                         $this->contentModel,
2500                                         $this->contentFormat,
2501                                         $ex->getMessage()
2502                                 );
2503                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2504                         }
2505                 }
2506
2507                 // Marker for detecting truncated form data.  This must be the last
2508                 // parameter sent in order to be of use, so do not move me.
2509                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2510                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2511
2512                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2513                         $this->displayPreviewArea( $previewOutput, false );
2514                 }
2515
2516         }
2517
2518         /**
2519          * Extract the section title from current section text, if any.
2520          *
2521          * @param string $text
2522          * @return string|bool String or false
2523          */
2524         public static function extractSectionTitle( $text ) {
2525                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2526                 if ( !empty( $matches[2] ) ) {
2527                         global $wgParser;
2528                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2529                 } else {
2530                         return false;
2531                 }
2532         }
2533
2534         /**
2535          * @return bool
2536          */
2537         protected function showHeader() {
2538                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2539                 global $wgAllowUserCss, $wgAllowUserJs;
2540
2541                 if ( $this->mTitle->isTalkPage() ) {
2542                         $wgOut->addWikiMsg( 'talkpagetext' );
2543                 }
2544
2545                 // Add edit notices
2546                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2547
2548                 if ( $this->isConflict ) {
2549                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2550                         $this->edittime = $this->mArticle->getTimestamp();
2551                 } else {
2552                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2553                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2554                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2555                                 // Someone is welcome to try refactoring though
2556                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2557                                 return false;
2558                         }
2559
2560                         if ( $this->section != '' && $this->section != 'new' ) {
2561                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2562                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2563                                         if ( $sectionTitle !== false ) {
2564                                                 $this->summary = "/* $sectionTitle */ ";
2565                                         }
2566                                 }
2567                         }
2568
2569                         if ( $this->missingComment ) {
2570                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2571                         }
2572
2573                         if ( $this->missingSummary && $this->section != 'new' ) {
2574                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2575                         }
2576
2577                         if ( $this->missingSummary && $this->section == 'new' ) {
2578                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2579                         }
2580
2581                         if ( $this->blankArticle ) {
2582                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2583                         }
2584
2585                         if ( $this->selfRedirect ) {
2586                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2587                         }
2588
2589                         if ( $this->hookError !== '' ) {
2590                                 $wgOut->addWikiText( $this->hookError );
2591                         }
2592
2593                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2594                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2595                         }
2596
2597                         if ( $this->section != 'new' ) {
2598                                 $revision = $this->mArticle->getRevisionFetched();
2599                                 if ( $revision ) {
2600                                         // Let sysop know that this will make private content public if saved
2601
2602                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2603                                                 $wgOut->wrapWikiMsg(
2604                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2605                                                         'rev-deleted-text-permission'
2606                                                 );
2607                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2608                                                 $wgOut->wrapWikiMsg(
2609                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2610                                                         'rev-deleted-text-view'
2611                                                 );
2612                                         }
2613
2614                                         if ( !$revision->isCurrent() ) {
2615                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2616                                                 $wgOut->addWikiMsg( 'editingold' );
2617                                         }
2618                                 } elseif ( $this->mTitle->exists() ) {
2619                                         // Something went wrong
2620
2621                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2622                                                 array( 'missing-revision', $this->oldid ) );
2623                                 }
2624                         }
2625                 }
2626
2627                 if ( wfReadOnly() ) {
2628                         $wgOut->wrapWikiMsg(
2629                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2630                                 array( 'readonlywarning', wfReadOnlyReason() )
2631                         );
2632                 } elseif ( $wgUser->isAnon() ) {
2633                         if ( $this->formtype != 'preview' ) {
2634                                 $wgOut->wrapWikiMsg(
2635                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2636                                         array( 'anoneditwarning',
2637                                                 // Log-in link
2638                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2639                                                 // Sign-up link
2640                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2641                                 );
2642                         } else {
2643                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2644                                         'anonpreviewwarning'
2645                                 );
2646                         }
2647                 } else {
2648                         if ( $this->isCssJsSubpage ) {
2649                                 # Check the skin exists
2650                                 if ( $this->isWrongCaseCssJsPage ) {
2651                                         $wgOut->wrapWikiMsg(
2652                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2653                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2654                                         );
2655                                 }
2656                                 if ( $this->formtype !== 'preview' ) {
2657                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2658                                                 $wgOut->wrapWikiMsg(
2659                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2660                                                         array( 'usercssyoucanpreview' )
2661                                                 );
2662                                         }
2663
2664                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2665                                                 $wgOut->wrapWikiMsg(
2666                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2667                                                         array( 'userjsyoucanpreview' )
2668                                                 );
2669                                         }
2670                                 }
2671                         }
2672                 }
2673
2674                 if ( $this->mTitle->isProtected( 'edit' ) &&
2675                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2676                 ) {
2677                         # Is the title semi-protected?
2678                         if ( $this->mTitle->isSemiProtected() ) {
2679                                 $noticeMsg = 'semiprotectedpagewarning';
2680                         } else {
2681                                 # Then it must be protected based on static groups (regular)
2682                                 $noticeMsg = 'protectedpagewarning';
2683                         }
2684                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2685                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2686                 }
2687                 if ( $this->mTitle->isCascadeProtected() ) {
2688                         # Is this page under cascading protection from some source pages?
2689                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2690                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2691                         $cascadeSourcesCount = count( $cascadeSources );
2692                         if ( $cascadeSourcesCount > 0 ) {
2693                                 # Explain, and list the titles responsible
2694                                 foreach ( $cascadeSources as $page ) {
2695                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2696                                 }
2697                         }
2698                         $notice .= '</div>';
2699                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2700                 }
2701                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2702                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2703                                 array( 'lim' => 1,
2704                                         'showIfEmpty' => false,
2705                                         'msgKey' => array( 'titleprotectedwarning' ),
2706                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2707                 }
2708
2709                 if ( $this->kblength === false ) {
2710                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2711                 }
2712
2713                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2714                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2715                                 array(
2716                                         'longpageerror',
2717                                         $wgLang->formatNum( $this->kblength ),
2718                                         $wgLang->formatNum( $wgMaxArticleSize )
2719                                 )
2720                         );
2721                 } else {
2722                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2723                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2724                                         array(
2725                                                 'longpage-hint',
2726                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2727                                                 strlen( $this->textbox1 )
2728                                         )
2729                                 );
2730                         }
2731                 }
2732                 # Add header copyright warning
2733                 $this->showHeaderCopyrightWarning();
2734
2735                 return true;
2736         }
2737
2738         /**
2739          * Standard summary input and label (wgSummary), abstracted so EditPage
2740          * subclasses may reorganize the form.
2741          * Note that you do not need to worry about the label's for=, it will be
2742          * inferred by the id given to the input. You can remove them both by
2743          * passing array( 'id' => false ) to $userInputAttrs.
2744          *
2745          * @param string $summary The value of the summary input
2746          * @param string $labelText The html to place inside the label
2747          * @param array $inputAttrs Array of attrs to use on the input
2748          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2749          *
2750          * @return array An array in the format array( $label, $input )
2751          */
2752         function getSummaryInput( $summary = "", $labelText = null,
2753                 $inputAttrs = null, $spanLabelAttrs = null
2754         ) {
2755                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2756                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2757                         'id' => 'wpSummary',
2758                         'maxlength' => '200',
2759                         'tabindex' => '1',
2760                         'size' => 60,
2761                         'spellcheck' => 'true',
2762                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2763
2764                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2765                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2766                         'id' => "wpSummaryLabel"
2767                 );
2768
2769                 $label = null;
2770                 if ( $labelText ) {
2771                         $label = Xml::tags(
2772                                 'label',
2773                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2774                                 $labelText
2775                         );
2776                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2777                 }
2778
2779                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2780
2781                 return array( $label, $input );
2782         }
2783
2784         /**
2785          * @param bool $isSubjectPreview True if this is the section subject/title
2786          *   up top, or false if this is the comment summary
2787          *   down below the textarea
2788          * @param string $summary The text of the summary to display
2789          */
2790         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2791                 global $wgOut, $wgContLang;
2792                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2793                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2794                 if ( $isSubjectPreview ) {
2795                         if ( $this->nosummary ) {
2796                                 return;
2797                         }
2798                 } else {
2799                         if ( !$this->mShowSummaryField ) {
2800                                 return;
2801                         }
2802                 }
2803                 $summary = $wgContLang->recodeForEdit( $summary );
2804                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2805                 list( $label, $input ) = $this->getSummaryInput(
2806                         $summary,
2807                         $labelText,
2808                         array( 'class' => $summaryClass ),
2809                         array()
2810                 );
2811                 $wgOut->addHTML( "{$label} {$input}" );
2812         }
2813
2814         /**
2815          * @param bool $isSubjectPreview True if this is the section subject/title
2816          *   up top, or false if this is the comment summary
2817          *   down below the textarea
2818          * @param string $summary The text of the summary to display
2819          * @return string
2820          */
2821         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2822                 // avoid spaces in preview, gets always trimmed on save
2823                 $summary = trim( $summary );
2824                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2825                         return "";
2826                 }
2827
2828                 global $wgParser;
2829
2830                 if ( $isSubjectPreview ) {
2831                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2832                                 ->inContentLanguage()->text();
2833                 }
2834
2835                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2836
2837                 $summary = wfMessage( $message )->parse()
2838                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2839                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2840         }
2841
2842         protected function showFormBeforeText() {
2843                 global $wgOut;
2844                 $section = htmlspecialchars( $this->section );
2845                 $wgOut->addHTML( <<<HTML
2846 <input type='hidden' value="{$section}" name="wpSection"/>
2847 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2848 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2849 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2850
2851 HTML
2852                 );
2853                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2854                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2855                 }
2856         }
2857
2858         protected function showFormAfterText() {
2859                 global $wgOut, $wgUser;
2860                 /**
2861                  * To make it harder for someone to slip a user a page
2862                  * which submits an edit form to the wiki without their
2863                  * knowledge, a random token is associated with the login
2864                  * session. If it's not passed back with the submission,
2865                  * we won't save the page, or render user JavaScript and
2866                  * CSS previews.
2867                  *
2868                  * For anon editors, who may not have a session, we just
2869                  * include the constant suffix to prevent editing from
2870                  * broken text-mangling proxies.
2871                  */
2872                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2873         }
2874
2875         /**
2876          * Subpage overridable method for printing the form for page content editing
2877          * By default this simply outputs wpTextbox1
2878          * Subclasses can override this to provide a custom UI for editing;
2879          * be it a form, or simply wpTextbox1 with a modified content that will be
2880          * reverse modified when extracted from the post data.
2881          * Note that this is basically the inverse for importContentFormData
2882          */
2883         protected function showContentForm() {
2884                 $this->showTextbox1();
2885         }
2886
2887         /**
2888          * Method to output wpTextbox1
2889          * The $textoverride method can be used by subclasses overriding showContentForm
2890          * to pass back to this method.
2891          *
2892          * @param array $customAttribs Array of html attributes to use in the textarea
2893          * @param string $textoverride Optional text to override $this->textarea1 with
2894          */
2895         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2896                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2897                         $attribs = array( 'style' => 'display:none;' );
2898                 } else {
2899                         $classes = array(); // Textarea CSS
2900                         if ( $this->mTitle->isProtected( 'edit' ) &&
2901                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2902                         ) {
2903                                 # Is the title semi-protected?
2904                                 if ( $this->mTitle->isSemiProtected() ) {
2905                                         $classes[] = 'mw-textarea-sprotected';
2906                                 } else {
2907                                         # Then it must be protected based on static groups (regular)
2908                                         $classes[] = 'mw-textarea-protected';
2909                                 }
2910                                 # Is the title cascade-protected?
2911                                 if ( $this->mTitle->isCascadeProtected() ) {
2912                                         $classes[] = 'mw-textarea-cprotected';
2913                                 }
2914                         }
2915
2916                         $attribs = array( 'tabindex' => 1 );
2917
2918                         if ( is_array( $customAttribs ) ) {
2919                                 $attribs += $customAttribs;
2920                         }
2921
2922                         if ( count( $classes ) ) {
2923                                 if ( isset( $attribs['class'] ) ) {
2924                                         $classes[] = $attribs['class'];
2925                                 }
2926                                 $attribs['class'] = implode( ' ', $classes );
2927                         }
2928                 }
2929
2930                 $this->showTextbox(
2931                         $textoverride !== null ? $textoverride : $this->textbox1,
2932                         'wpTextbox1',
2933                         $attribs
2934                 );
2935         }
2936
2937         protected function showTextbox2() {
2938                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2939         }
2940
2941         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2942                 global $wgOut, $wgUser;
2943
2944                 $wikitext = $this->safeUnicodeOutput( $text );
2945                 if ( strval( $wikitext ) !== '' ) {
2946                         // Ensure there's a newline at the end, otherwise adding lines
2947                         // is awkward.
2948                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2949                         // mode will show an extra newline. A bit annoying.
2950                         $wikitext .= "\n";
2951                 }
2952
2953                 $attribs = $customAttribs + array(
2954                         'accesskey' => ',',
2955                         'id' => $name,
2956                         'cols' => $wgUser->getIntOption( 'cols' ),
2957                         'rows' => $wgUser->getIntOption( 'rows' ),
2958                         // Avoid PHP notices when appending preferences
2959                         // (appending allows customAttribs['style'] to still work).
2960                         'style' => ''
2961                 );
2962
2963                 $pageLang = $this->mTitle->getPageLanguage();
2964                 $attribs['lang'] = $pageLang->getHtmlCode();
2965                 $attribs['dir'] = $pageLang->getDir();
2966
2967                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2968         }
2969
2970         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2971                 global $wgOut;
2972                 $classes = array();
2973                 if ( $isOnTop ) {
2974                         $classes[] = 'ontop';
2975                 }
2976
2977                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2978
2979                 if ( $this->formtype != 'preview' ) {
2980                         $attribs['style'] = 'display: none;';
2981                 }
2982
2983                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2984
2985                 if ( $this->formtype == 'preview' ) {
2986                         $this->showPreview( $previewOutput );
2987                 }
2988
2989                 $wgOut->addHTML( '</div>' );
2990
2991                 if ( $this->formtype == 'diff' ) {
2992                         try {
2993                                 $this->showDiff();
2994                         } catch ( MWContentSerializationException $ex ) {
2995                                 $msg = wfMessage(
2996                                         'content-failed-to-parse',
2997                                         $this->contentModel,
2998                                         $this->contentFormat,
2999                                         $ex->getMessage()
3000                                 );
3001                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3002                         }
3003                 }
3004         }
3005
3006         /**
3007          * Append preview output to $wgOut.
3008          * Includes category rendering if this is a category page.
3009          *
3010          * @param string $text The HTML to be output for the preview.
3011          */
3012         protected function showPreview( $text ) {
3013                 global $wgOut;
3014                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3015                         $this->mArticle->openShowCategory();
3016                 }
3017                 # This hook seems slightly odd here, but makes things more
3018                 # consistent for extensions.
3019                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3020                 $wgOut->addHTML( $text );
3021                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3022                         $this->mArticle->closeShowCategory();
3023                 }
3024         }
3025
3026         /**
3027          * Get a diff between the current contents of the edit box and the
3028          * version of the page we're editing from.
3029          *
3030          * If this is a section edit, we'll replace the section as for final
3031          * save and then make a comparison.
3032          */
3033         function showDiff() {
3034                 global $wgUser, $wgContLang, $wgOut;
3035
3036                 $oldtitlemsg = 'currentrev';
3037                 # if message does not exist, show diff against the preloaded default
3038                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3039                         $oldtext = $this->mTitle->getDefaultMessageText();
3040                         if ( $oldtext !== false ) {
3041                                 $oldtitlemsg = 'defaultmessagetext';
3042                                 $oldContent = $this->toEditContent( $oldtext );
3043                         } else {
3044                                 $oldContent = null;
3045                         }
3046                 } else {
3047                         $oldContent = $this->getCurrentContent();
3048                 }
3049
3050                 $textboxContent = $this->toEditContent( $this->textbox1 );
3051
3052                 $newContent = $this->mArticle->replaceSectionContent(
3053                                                         $this->section, $textboxContent,
3054                                                         $this->summary, $this->edittime );
3055
3056                 if ( $newContent ) {
3057                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3058                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3059
3060                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3061                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3062                 }
3063
3064                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3065                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3066                         $newtitle = wfMessage( 'yourtext' )->parse();
3067
3068                         if ( !$oldContent ) {
3069                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3070                         }
3071
3072                         if ( !$newContent ) {
3073                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3074                         }
3075
3076                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3077                         $de->setContent( $oldContent, $newContent );
3078
3079                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3080                         $de->showDiffStyle();
3081                 } else {
3082                         $difftext = '';
3083                 }
3084
3085                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3086         }
3087
3088         /**
3089          * Show the header copyright warning.
3090          */
3091         protected function showHeaderCopyrightWarning() {
3092                 $msg = 'editpage-head-copy-warn';
3093                 if ( !wfMessage( $msg )->isDisabled() ) {
3094                         global $wgOut;
3095                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3096                                 'editpage-head-copy-warn' );
3097                 }
3098         }
3099
3100         /**
3101          * Give a chance for site and per-namespace customizations of
3102          * terms of service summary link that might exist separately
3103          * from the copyright notice.
3104          *
3105          * This will display between the save button and the edit tools,
3106          * so should remain short!
3107          */
3108         protected function showTosSummary() {
3109                 $msg = 'editpage-tos-summary';
3110                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3111                 if ( !wfMessage( $msg )->isDisabled() ) {
3112                         global $wgOut;
3113                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3114                         $wgOut->addWikiMsg( $msg );
3115                         $wgOut->addHTML( '</div>' );
3116                 }
3117         }
3118
3119         protected function showEditTools() {
3120                 global $wgOut;
3121                 $wgOut->addHTML( '<div class="mw-editTools">' .
3122                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3123                         '</div>' );
3124         }
3125
3126         /**
3127          * Get the copyright warning
3128          *
3129          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3130          * @return string
3131          */
3132         protected function getCopywarn() {
3133                 return self::getCopyrightWarning( $this->mTitle );
3134         }
3135
3136         /**
3137          * Get the copyright warning, by default returns wikitext
3138          *
3139          * @param Title $title
3140          * @param string $format Output format, valid values are any function of a Message object
3141          * @return string
3142          */
3143         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3144                 global $wgRightsText;
3145                 if ( $wgRightsText ) {
3146                         $copywarnMsg = array( 'copyrightwarning',
3147                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3148                                 $wgRightsText );
3149                 } else {
3150                         $copywarnMsg = array( 'copyrightwarning2',
3151                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3152                 }
3153                 // Allow for site and per-namespace customization of contribution/copyright notice.
3154                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3155
3156                 return "<div id=\"editpage-copywarn\">\n" .
3157                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3158         }
3159
3160         /**
3161          * Get the Limit report for page previews
3162          *
3163          * @since 1.22
3164          * @param ParserOutput $output ParserOutput object from the parse
3165          * @return string HTML
3166          */
3167         public static function getPreviewLimitReport( $output ) {
3168                 if ( !$output || !$output->getLimitReportData() ) {
3169                         return '';
3170                 }
3171
3172                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3173                         wfMessage( 'limitreport-title' )->parseAsBlock()
3174                 );
3175
3176                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3177                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3178
3179                 $limitReport .= Html::openElement( 'table', array(
3180                         'class' => 'preview-limit-report wikitable'
3181                 ) ) .
3182                         Html::openElement( 'tbody' );
3183
3184                 foreach ( $output->getLimitReportData() as $key => $value ) {
3185                         if ( Hooks::run( 'ParserLimitReportFormat',
3186                                 array( $key, &$value, &$limitReport, true, true )
3187                         ) ) {
3188                                 $keyMsg = wfMessage( $key );
3189                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3190                                 if ( !$valueMsg->exists() ) {
3191                                         $valueMsg = new RawMessage( '$1' );
3192                                 }
3193                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3194                                         $limitReport .= Html::openElement( 'tr' ) .
3195                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3196                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3197                                                 Html::closeElement( 'tr' );
3198                                 }
3199                         }
3200                 }
3201
3202                 $limitReport .= Html::closeElement( 'tbody' ) .
3203                         Html::closeElement( 'table' ) .
3204                         Html::closeElement( 'div' );
3205
3206                 return $limitReport;
3207         }
3208
3209         protected function showStandardInputs( &$tabindex = 2 ) {
3210                 global $wgOut;
3211                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3212
3213                 if ( $this->section != 'new' ) {
3214                         $this->showSummaryInput( false, $this->summary );
3215                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3216                 }
3217
3218                 $checkboxes = $this->getCheckboxes( $tabindex,
3219                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3220                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3221
3222                 // Show copyright warning.
3223                 $wgOut->addWikiText( $this->getCopywarn() );
3224                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3225
3226                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3227                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3228
3229                 $cancel = $this->getCancelLink();
3230                 if ( $cancel !== '' ) {
3231                         $cancel .= Html::element( 'span',
3232                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3233                                 wfMessage( 'pipe-separator' )->text() );
3234                 }
3235
3236                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3237                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3238                 $attrs = array(
3239                         'target' => 'helpwindow',
3240                         'href' => $edithelpurl,
3241                 );
3242                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3243                         $attrs, array( 'mw-ui-quiet' ) ) .
3244                         wfMessage( 'word-separator' )->escaped() .
3245                         wfMessage( 'newwindow' )->parse();
3246
3247                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3248                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3249                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3250
3251                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3252
3253                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3254         }
3255
3256         /**
3257          * Show an edit conflict. textbox1 is already shown in showEditForm().
3258          * If you want to use another entry point to this function, be careful.
3259          */
3260         protected function showConflict() {
3261                 global $wgOut;
3262
3263                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3264                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3265
3266                         $content1 = $this->toEditContent( $this->textbox1 );
3267                         $content2 = $this->toEditContent( $this->textbox2 );
3268
3269                         $handler = ContentHandler::getForModelID( $this->contentModel );
3270                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3271                         $de->setContent( $content2, $content1 );
3272                         $de->showDiff(
3273                                 wfMessage( 'yourtext' )->parse(),
3274                                 wfMessage( 'storedversion' )->text()
3275                         );
3276
3277                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3278                         $this->showTextbox2();
3279                 }
3280         }
3281
3282         /**
3283          * @return string
3284          */
3285         public function getCancelLink() {
3286                 $cancelParams = array();
3287                 if ( !$this->isConflict && $this->oldid > 0 ) {
3288                         $cancelParams['oldid'] = $this->oldid;
3289                 }
3290                 $attrs = array( 'id' => 'mw-editform-cancel' );
3291
3292                 return Linker::linkKnown(
3293                         $this->getContextTitle(),
3294                         wfMessage( 'cancel' )->parse(),
3295                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3296                         $cancelParams
3297                 );
3298         }
3299
3300         /**
3301          * Returns the URL to use in the form's action attribute.
3302          * This is used by EditPage subclasses when simply customizing the action
3303          * variable in the constructor is not enough. This can be used when the
3304          * EditPage lives inside of a Special page rather than a custom page action.
3305          *
3306          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3307          * @return string
3308          */
3309         protected function getActionURL( Title $title ) {
3310                 return $title->getLocalURL( array( 'action' => $this->action ) );
3311         }
3312
3313         /**
3314          * Check if a page was deleted while the user was editing it, before submit.
3315          * Note that we rely on the logging table, which hasn't been always there,
3316          * but that doesn't matter, because this only applies to brand new
3317          * deletes.
3318          * @return bool
3319          */
3320         protected function wasDeletedSinceLastEdit() {
3321                 if ( $this->deletedSinceEdit !== null ) {
3322                         return $this->deletedSinceEdit;
3323                 }
3324
3325                 $this->deletedSinceEdit = false;
3326
3327                 if ( $this->mTitle->isDeletedQuick() ) {
3328                         $this->lastDelete = $this->getLastDelete();
3329                         if ( $this->lastDelete ) {
3330                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3331                                 if ( $deleteTime > $this->starttime ) {
3332                                         $this->deletedSinceEdit = true;
3333                                 }
3334                         }
3335                 }
3336
3337                 return $this->deletedSinceEdit;
3338         }
3339
3340         /**
3341          * @return bool|stdClass
3342          */
3343         protected function getLastDelete() {
3344                 $dbr = wfGetDB( DB_SLAVE );
3345                 $data = $dbr->selectRow(
3346                         array( 'logging', 'user' ),
3347                         array(
3348                                 'log_type',
3349                                 'log_action',
3350                                 'log_timestamp',
3351                                 'log_user',
3352                                 'log_namespace',
3353                                 'log_title',
3354                                 'log_comment',
3355                                 'log_params',
3356                                 'log_deleted',
3357                                 'user_name'
3358                         ), array(
3359                                 'log_namespace' => $this->mTitle->getNamespace(),
3360                                 'log_title' => $this->mTitle->getDBkey(),
3361                                 'log_type' => 'delete',
3362                                 'log_action' => 'delete',
3363                                 'user_id=log_user'
3364                         ),
3365                         __METHOD__,
3366                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3367                 );
3368                 // Quick paranoid permission checks...
3369                 if ( is_object( $data ) ) {
3370                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3371                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3372                         }
3373
3374                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3375                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3376                         }
3377                 }
3378
3379                 return $data;
3380         }
3381
3382         /**
3383          * Get the rendered text for previewing.
3384          * @throws MWException
3385          * @return string
3386          */
3387         function getPreviewText() {
3388                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3389                 global $wgAllowUserCss, $wgAllowUserJs;
3390
3391                 if ( $wgRawHtml && !$this->mTokenOk ) {
3392                         // Could be an offsite preview attempt. This is very unsafe if
3393                         // HTML is enabled, as it could be an attack.
3394                         $parsedNote = '';
3395                         if ( $this->textbox1 !== '' ) {
3396                                 // Do not put big scary notice, if previewing the empty
3397                                 // string, which happens when you initially edit
3398                                 // a category page, due to automatic preview-on-open.
3399                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3400                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3401                         }
3402                         return $parsedNote;
3403                 }
3404
3405                 $note = '';
3406
3407                 try {
3408                         $content = $this->toEditContent( $this->textbox1 );
3409
3410                         $previewHTML = '';
3411                         if ( !Hooks::run(
3412                                 'AlternateEditPreview',
3413                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3414                         ) {
3415                                 return $previewHTML;
3416                         }
3417
3418                         # provide a anchor link to the editform
3419                         $continueEditing = '<span class="mw-continue-editing">' .
3420                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3421                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3422                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3423                                 if ( $this->mTokenOkExceptSuffix ) {
3424                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3425                                 } else {
3426                                         $note = wfMessage( 'session_fail_preview' )->plain();
3427                                 }
3428                         } elseif ( $this->incompleteForm ) {
3429                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3430                         } else {
3431                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3432                         }
3433
3434                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3435                         $parserOptions->setIsPreview( true );
3436                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3437
3438                         # don't parse non-wikitext pages, show message about preview
3439                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3440                                 if ( $this->mTitle->isCssJsSubpage() ) {
3441                                         $level = 'user';
3442                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3443                                         $level = 'site';
3444                                 } else {
3445                                         $level = false;
3446                                 }
3447
3448                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3449                                         $format = 'css';
3450                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3451                                                 $format = false;
3452                                         }
3453                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3454                                         $format = 'js';
3455                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3456                                                 $format = false;
3457                                         }
3458                                 } else {
3459                                         $format = false;
3460                                 }
3461
3462                                 # Used messages to make sure grep find them:
3463                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3464                                 if ( $level && $format ) {
3465                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3466                                                 wfMessage( "{$level}{$format}preview" )->text() .
3467                                                 ' ' . $continueEditing . "</div>";
3468                                 }
3469                         }
3470
3471                         # If we're adding a comment, we need to show the
3472                         # summary as the headline
3473                         if ( $this->section === "new" && $this->summary !== "" ) {
3474                                 $content = $content->addSectionHeader( $this->summary );
3475                         }
3476
3477                         $hook_args = array( $this, &$content );
3478                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3479                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3480
3481                         $parserOptions->enableLimitReport();
3482
3483                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3484                         # But it's now deprecated, so never mind
3485
3486                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3487                         $scopedCallback = $parserOptions->setupFakeRevision(
3488                                 $this->mTitle, $pstContent, $wgUser );
3489                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3490
3491                         # Try to stash the edit for the final submission step
3492                         # @todo: different date format preferences cause cache misses
3493                         ApiStashEdit::stashEditFromPreview(
3494                                 $this->getArticle(), $content, $pstContent,
3495                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3496                         );
3497
3498                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3499                         $previewHTML = $parserOutput->getText();
3500                         $this->mParserOutput = $parserOutput;
3501                         $wgOut->addParserOutputMetadata( $parserOutput );
3502
3503                         if ( count( $parserOutput->getWarnings() ) ) {
3504                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3505                         }
3506                 } catch ( MWContentSerializationException $ex ) {
3507                         $m = wfMessage(
3508                                 'content-failed-to-parse',
3509                                 $this->contentModel,
3510                                 $this->contentFormat,
3511                                 $ex->getMessage()
3512                         );
3513                         $note .= "\n\n" . $m->parse();
3514                         $previewHTML = '';
3515                 }
3516
3517                 if ( $this->isConflict ) {
3518                         $conflict = '<h2 id="mw-previewconflict">'
3519                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3520                 } else {
3521                         $conflict = '<hr />';
3522                 }
3523
3524                 $previewhead = "<div class='previewnote'>\n" .
3525                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3526                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3527
3528                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3529                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3530                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3531                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3532
3533                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3534         }
3535
3536         /**
3537          * @return array
3538          */
3539         function getTemplates() {
3540                 if ( $this->preview || $this->section != '' ) {
3541                         $templates = array();
3542                         if ( !isset( $this->mParserOutput ) ) {
3543                                 return $templates;
3544                         }
3545                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3546                                 foreach ( array_keys( $template ) as $dbk ) {
3547                                         $templates[] = Title::makeTitle( $ns, $dbk );
3548                                 }
3549                         }
3550                         return $templates;
3551                 } else {
3552                         return $this->mTitle->getTemplateLinksFrom();
3553                 }
3554         }
3555
3556         /**
3557          * Shows a bulletin board style toolbar for common editing functions.
3558          * It can be disabled in the user preferences.
3559          *
3560          * @return string
3561          */
3562         static function getEditToolbar() {
3563                 global $wgContLang, $wgOut;
3564                 global $wgEnableUploads, $wgForeignFileRepos;
3565
3566                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3567
3568                 /**
3569                  * $toolarray is an array of arrays each of which includes the
3570                  * opening tag, the closing tag, optionally a sample text that is
3571                  * inserted between the two when no selection is highlighted
3572                  * and.  The tip text is shown when the user moves the mouse
3573                  * over the button.
3574                  *
3575                  * Images are defined in ResourceLoaderEditToolbarModule.
3576                  */
3577                 $toolarray = array(
3578                         array(
3579                                 'id'     => 'mw-editbutton-bold',
3580                                 'open'   => '\'\'\'',
3581                                 'close'  => '\'\'\'',
3582                                 'sample' => wfMessage( 'bold_sample' )->text(),
3583                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3584                         ),
3585                         array(
3586                                 'id'     => 'mw-editbutton-italic',
3587                                 'open'   => '\'\'',
3588                                 'close'  => '\'\'',
3589                                 'sample' => wfMessage( 'italic_sample' )->text(),
3590                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3591                         ),
3592                         array(
3593                                 'id'     => 'mw-editbutton-link',
3594                                 'open'   => '[[',
3595                                 'close'  => ']]',
3596                                 'sample' => wfMessage( 'link_sample' )->text(),
3597                                 'tip'    => wfMessage( 'link_tip' )->text(),
3598                         ),
3599                         array(
3600                                 'id'     => 'mw-editbutton-extlink',
3601                                 'open'   => '[',
3602                                 'close'  => ']',
3603                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3604                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3605                         ),
3606                         array(
3607                                 'id'     => 'mw-editbutton-headline',
3608                                 'open'   => "\n== ",
3609                                 'close'  => " ==\n",
3610                                 'sample' => wfMessage( 'headline_sample' )->text(),
3611                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3612                         ),
3613                         $imagesAvailable ? array(
3614                                 'id'     => 'mw-editbutton-image',
3615                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3616                                 'close'  => ']]',
3617                                 'sample' => wfMessage( 'image_sample' )->text(),
3618                                 'tip'    => wfMessage( 'image_tip' )->text(),
3619                         ) : false,
3620                         $imagesAvailable ? array(
3621                                 'id'     => 'mw-editbutton-media',
3622                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3623                                 'close'  => ']]',
3624                                 'sample' => wfMessage( 'media_sample' )->text(),
3625                                 'tip'    => wfMessage( 'media_tip' )->text(),
3626                         ) : false,
3627                         array(
3628                                 'id'     => 'mw-editbutton-nowiki',
3629                                 'open'   => "<nowiki>",
3630                                 'close'  => "</nowiki>",
3631                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3632                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3633                         ),
3634                         array(
3635                                 'id'     => 'mw-editbutton-signature',
3636                                 'open'   => '--~~~~',
3637                                 'close'  => '',
3638                                 'sample' => '',
3639                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3640                         ),
3641                         array(
3642                                 'id'     => 'mw-editbutton-hr',
3643                                 'open'   => "\n----\n",
3644                                 'close'  => '',
3645                                 'sample' => '',
3646                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3647                         )
3648                 );
3649
3650                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3651                 foreach ( $toolarray as $tool ) {
3652                         if ( !$tool ) {
3653                                 continue;
3654                         }
3655
3656                         $params = array(
3657                                 // Images are defined in ResourceLoaderEditToolbarModule
3658                                 false,
3659                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3660                                 // Older browsers show a "speedtip" type message only for ALT.
3661                                 // Ideally these should be different, realistically they
3662                                 // probably don't need to be.
3663                                 $tool['tip'],
3664                                 $tool['open'],
3665                                 $tool['close'],
3666                                 $tool['sample'],
3667                                 $tool['id'],
3668                         );
3669
3670                         $script .= Xml::encodeJsCall(
3671                                 'mw.toolbar.addButton',
3672                                 $params,
3673                                 ResourceLoader::inDebugMode()
3674                         );
3675                 }
3676
3677                 $script .= '});';
3678                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3679
3680                 $toolbar = '<div id="toolbar"></div>';
3681
3682                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3683
3684                 return $toolbar;
3685         }
3686
3687         /**
3688          * Returns an array of html code of the following checkboxes:
3689          * minor and watch
3690          *
3691          * @param int $tabindex Current tabindex
3692          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3693          *                 status of the checkbox
3694          *
3695          * @return array
3696          */
3697         public function getCheckboxes( &$tabindex, $checked ) {
3698                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3699
3700                 $checkboxes = array();
3701
3702                 // don't show the minor edit checkbox if it's a new page or section
3703                 if ( !$this->isNew ) {
3704                         $checkboxes['minor'] = '';
3705                         $minorLabel = wfMessage( 'minoredit' )->parse();
3706                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3707                                 $attribs = array(
3708                                         'tabindex' => ++$tabindex,
3709                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3710                                         'id' => 'wpMinoredit',
3711                                 );
3712                                 $minorEditHtml =
3713                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3714                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3715                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3716                                         ">{$minorLabel}</label>";
3717
3718                                 if ( $wgUseMediaWikiUIEverywhere ) {
3719                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3720                                                 $minorEditHtml .
3721                                         Html::closeElement( 'div' );
3722                                 } else {
3723                                         $checkboxes['minor'] = $minorEditHtml;
3724                                 }
3725                         }
3726                 }
3727
3728                 $watchLabel = wfMessage( 'watchthis' )->parse();
3729                 $checkboxes['watch'] = '';
3730                 if ( $wgUser->isLoggedIn() ) {
3731                         $attribs = array(
3732                                 'tabindex' => ++$tabindex,
3733                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3734                                 'id' => 'wpWatchthis',
3735                         );
3736                         $watchThisHtml =
3737                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3738                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3739                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3740                                 ">{$watchLabel}</label>";
3741                         if ( $wgUseMediaWikiUIEverywhere ) {
3742                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3743                                         $watchThisHtml .
3744                                         Html::closeElement( 'div' );
3745                         } else {
3746                                 $checkboxes['watch'] = $watchThisHtml;
3747                         }
3748                 }
3749                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3750                 return $checkboxes;
3751         }
3752
3753         /**
3754          * Returns an array of html code of the following buttons:
3755          * save, diff, preview and live
3756          *
3757          * @param int $tabindex Current tabindex
3758          *
3759          * @return array
3760          */
3761         public function getEditButtons( &$tabindex ) {
3762                 $buttons = array();
3763
3764                 $attribs = array(
3765                         'id' => 'wpSave',
3766                         'name' => 'wpSave',
3767                         'tabindex' => ++$tabindex,
3768                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3769                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3770                         $attribs, array( 'mw-ui-constructive' ) );
3771
3772                 ++$tabindex; // use the same for preview and live preview
3773                 $attribs = array(
3774                         'id' => 'wpPreview',
3775                         'name' => 'wpPreview',
3776                         'tabindex' => $tabindex,
3777                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3778                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3779                         $attribs );
3780                 $buttons['live'] = '';
3781
3782                 $attribs = array(
3783                         'id' => 'wpDiff',
3784                         'name' => 'wpDiff',
3785                         'tabindex' => ++$tabindex,
3786                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3787                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3788                         $attribs );
3789
3790                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3791                 return $buttons;
3792         }
3793
3794         /**
3795          * Output preview text only. This can be sucked into the edit page
3796          * via JavaScript, and saves the server time rendering the skin as
3797          * well as theoretically being more robust on the client (doesn't
3798          * disturb the edit box's undo history, won't eat your text on
3799          * failure, etc).
3800          *
3801          * @todo This doesn't include category or interlanguage links.
3802          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3803          *       or something...</s>" that might also require more skin
3804          *       initialization, so check whether that's a problem.
3805          */
3806         function livePreview() {
3807                 global $wgOut;
3808                 $wgOut->disable();
3809                 header( 'Content-type: text/xml; charset=utf-8' );
3810                 header( 'Cache-control: no-cache' );
3811
3812                 $previewText = $this->getPreviewText();
3813                 #$categories = $skin->getCategoryLinks();
3814
3815                 $s =
3816                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3817                         Xml::tags( 'livepreview', null,
3818                                 Xml::element( 'preview', null, $previewText )
3819                                 #.      Xml::element( 'category', null, $categories )
3820                         );
3821                 echo $s;
3822         }
3823
3824         /**
3825          * Creates a basic error page which informs the user that
3826          * they have attempted to edit a nonexistent section.
3827          */
3828         function noSuchSectionPage() {
3829                 global $wgOut;
3830
3831                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3832
3833                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3834                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3835                 $wgOut->addHTML( $res );
3836
3837                 $wgOut->returnToMain( false, $this->mTitle );
3838         }
3839
3840         /**
3841          * Show "your edit contains spam" page with your diff and text
3842          *
3843          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3844          */
3845         public function spamPageWithContent( $match = false ) {
3846                 global $wgOut, $wgLang;
3847                 $this->textbox2 = $this->textbox1;
3848
3849                 if ( is_array( $match ) ) {
3850                         $match = $wgLang->listToText( $match );
3851                 }
3852                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3853
3854                 $wgOut->addHTML( '<div id="spamprotected">' );
3855                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3856                 if ( $match ) {
3857                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3858                 }
3859                 $wgOut->addHTML( '</div>' );
3860
3861                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3862                 $this->showDiff();
3863
3864                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3865                 $this->showTextbox2();
3866
3867                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3868         }
3869
3870         /**
3871          * Check if the browser is on a blacklist of user-agents known to
3872          * mangle UTF-8 data on form submission. Returns true if Unicode
3873          * should make it through, false if it's known to be a problem.
3874          * @return bool
3875          */
3876         private function checkUnicodeCompliantBrowser() {
3877                 global $wgBrowserBlackList, $wgRequest;
3878
3879                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3880                 if ( $currentbrowser === false ) {
3881                         // No User-Agent header sent? Trust it by default...
3882                         return true;
3883                 }
3884
3885                 foreach ( $wgBrowserBlackList as $browser ) {
3886                         if ( preg_match( $browser, $currentbrowser ) ) {
3887                                 return false;
3888                         }
3889                 }
3890                 return true;
3891         }
3892
3893         /**
3894          * Filter an input field through a Unicode de-armoring process if it
3895          * came from an old browser with known broken Unicode editing issues.
3896          *
3897          * @param WebRequest $request
3898          * @param string $field
3899          * @return string
3900          */
3901         protected function safeUnicodeInput( $request, $field ) {
3902                 $text = rtrim( $request->getText( $field ) );
3903                 return $request->getBool( 'safemode' )
3904                         ? $this->unmakeSafe( $text )
3905                         : $text;
3906         }
3907
3908         /**
3909          * Filter an output field through a Unicode armoring process if it is
3910          * going to an old browser with known broken Unicode editing issues.
3911          *
3912          * @param string $text
3913          * @return string
3914          */
3915         protected function safeUnicodeOutput( $text ) {
3916                 global $wgContLang;
3917                 $codedText = $wgContLang->recodeForEdit( $text );
3918                 return $this->checkUnicodeCompliantBrowser()
3919                         ? $codedText
3920                         : $this->makeSafe( $codedText );
3921         }
3922
3923         /**
3924          * A number of web browsers are known to corrupt non-ASCII characters
3925          * in a UTF-8 text editing environment. To protect against this,
3926          * detected browsers will be served an armored version of the text,
3927          * with non-ASCII chars converted to numeric HTML character references.
3928          *
3929          * Preexisting such character references will have a 0 added to them
3930          * to ensure that round-trips do not alter the original data.
3931          *
3932          * @param string $invalue
3933          * @return string
3934          */
3935         private function makeSafe( $invalue ) {
3936                 // Armor existing references for reversibility.
3937                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3938
3939                 $bytesleft = 0;
3940                 $result = "";
3941                 $working = 0;
3942                 $valueLength = strlen( $invalue );
3943                 for ( $i = 0; $i < $valueLength; $i++ ) {
3944                         $bytevalue = ord( $invalue[$i] );
3945                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3946                                 $result .= chr( $bytevalue );
3947                                 $bytesleft = 0;
3948                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3949                                 $working = $working << 6;
3950                                 $working += ( $bytevalue & 0x3F );
3951                                 $bytesleft--;
3952                                 if ( $bytesleft <= 0 ) {
3953                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3954                                 }
3955                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3956                                 $working = $bytevalue & 0x1F;
3957                                 $bytesleft = 1;
3958                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3959                                 $working = $bytevalue & 0x0F;
3960                                 $bytesleft = 2;
3961                         } else { // 1111 0xxx
3962                                 $working = $bytevalue & 0x07;
3963                                 $bytesleft = 3;
3964                         }
3965                 }
3966                 return $result;
3967         }
3968
3969         /**
3970          * Reverse the previously applied transliteration of non-ASCII characters
3971          * back to UTF-8. Used to protect data from corruption by broken web browsers
3972          * as listed in $wgBrowserBlackList.
3973          *
3974          * @param string $invalue
3975          * @return string
3976          */
3977         private function unmakeSafe( $invalue ) {
3978                 $result = "";
3979                 $valueLength = strlen( $invalue );
3980                 for ( $i = 0; $i < $valueLength; $i++ ) {
3981                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3982                                 $i += 3;
3983                                 $hexstring = "";
3984                                 do {
3985                                         $hexstring .= $invalue[$i];
3986                                         $i++;
3987                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3988
3989                                 // Do some sanity checks. These aren't needed for reversibility,
3990                                 // but should help keep the breakage down if the editor
3991                                 // breaks one of the entities whilst editing.
3992                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
3993                                         $codepoint = hexdec( $hexstring );
3994                                         $result .= codepointToUtf8( $codepoint );
3995                                 } else {
3996                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3997                                 }
3998                         } else {
3999                                 $result .= substr( $invalue, $i, 1 );
4000                         }
4001                 }
4002                 // reverse the transform that we made for reversibility reasons.
4003                 return strtr( $result, array( "&#x0" => "&#x" ) );
4004         }
4005 }