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
 519                 $this->isConflict = false;
 520                 // css / js subpages of user pages get a special treatment
 521                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 522                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 523                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 524                 // @todo FIXME: Silly assignment.
 525                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 526
 527                 # Show applicable editing introductions
 528                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 529                         $this->showIntro();
 530                 }
 531
 532                 # Attempt submission here.  This will check for edit conflicts,
 533                 # and redundantly check for locked database, blocked IPs, etc.
 534                 # that edit() already checked just in case someone tries to sneak
 535                 # in the back door with a hand-edited submission URL.
 536
 537                 if ( 'save' == $this->formtype ) {
 538                         if ( !$this->attemptSave() ) {
 539                                 return;
 540                         }
 541                 }
 542
 543                 # First time through: get contents, set time for conflict
 544                 # checking, etc.
 545                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 546                         if ( $this->initialiseForm() === false ) {
 547                                 $this->noSuchSectionPage();
 548                                 return;
 549                         }
 550
 551                         if ( !$this->mTitle->getArticleID() ) {
 552                                 Hooks::run( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 553                         } else {
 554                                 Hooks::run( 'EditFormInitialText', array( $this ) );
 555                         }
 556
 557                 }
 558
 559                 $this->showEditForm();
 560         }
 561
 562         /**
 563          * @return array
 564          */
 565         protected function getEditPermissionErrors() {
 566                 global $wgUser;
 567                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 568                 # Can this title be created?
 569                 if ( !$this->mTitle->exists() ) {
 570                         $permErrors = array_merge( $permErrors,
 571                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 572                 }
 573                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 574                 $remove = array();
 575                 foreach ( $permErrors as $error ) {
 576                         if ( ( $this->preview || $this->diff )
 577                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 578                         ) {
 579                                 $remove[] = $error;
 580                         }
 581                 }
 582                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 583                 return $permErrors;
 584         }
 585
 586         /**
 587          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 588          * but with the following differences:
 589          * - If redlink=1, the user will be redirected to the page
 590          * - If there is content to display or the error occurs while either saving,
 591          *   previewing or showing the difference, it will be a
 592          *   "View source for ..." page displaying the source code after the error message.
 593          *
 594          * @since 1.19
 595          * @param array $permErrors Array of permissions errors, as returned by
 596          *    Title::getUserPermissionsErrors().
 597          * @throws PermissionsError
 598          */
 599         protected function displayPermissionsError( array $permErrors ) {
 600                 global $wgRequest, $wgOut;
 601
 602                 if ( $wgRequest->getBool( 'redlink' ) ) {
 603                         // The edit page was reached via a red link.
 604                         // Redirect to the article page and let them click the edit tab if
 605                         // they really want a permission error.
 606                         $wgOut->redirect( $this->mTitle->getFullURL() );
 607                         return;
 608                 }
 609
 610                 $content = $this->getContentObject();
 611
 612                 # Use the normal message if there's nothing to display
 613                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 614                         $action = $this->mTitle->exists() ? 'edit' :
 615                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 616                         throw new PermissionsError( $action, $permErrors );
 617                 }
 618
 619                 Hooks::run( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 620
 621                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 622                 $wgOut->setPageTitle( wfMessage(
 623                         'viewsource-title',
 624                         $this->getContextTitle()->getPrefixedText()
 625                 ) );
 626                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 627                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 628                 $wgOut->addHTML( "<hr />\n" );
 629
 630                 # If the user made changes, preserve them when showing the markup
 631                 # (This happens when a user is blocked during edit, for instance)
 632                 if ( !$this->firsttime ) {
 633                         $text = $this->textbox1;
 634                         $wgOut->addWikiMsg( 'viewyourtext' );
 635                 } else {
 636                         $text = $this->toEditText( $content );
 637                         $wgOut->addWikiMsg( 'viewsourcetext' );
 638                 }
 639
 640                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 641
 642                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 643                         Linker::formatTemplates( $this->getTemplates() ) ) );
 644
 645                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 646
 647                 if ( $this->mTitle->exists() ) {
 648                         $wgOut->returnToMain( null, $this->mTitle );
 649                 }
 650         }
 651
 652         /**
 653          * Should we show a preview when the edit form is first shown?
 654          *
 655          * @return bool
 656          */
 657         protected function previewOnOpen() {
 658                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 659                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 660                         // Explicit override from request
 661                         return true;
 662                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 663                         // Explicit override from request
 664                         return false;
 665                 } elseif ( $this->section == 'new' ) {
 666                         // Nothing *to* preview for new sections
 667                         return false;
 668                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 669                         && $wgUser->getOption( 'previewonfirst' )
 670                 ) {
 671                         // Standard preference behavior
 672                         return true;
 673                 } elseif ( !$this->mTitle->exists()
 674                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 675                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 676                 ) {
 677                         // Categories are special
 678                         return true;
 679                 } else {
 680                         return false;
 681                 }
 682         }
 683
 684         /**
 685          * Checks whether the user entered a skin name in uppercase,
 686          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 687          *
 688          * @return bool
 689          */
 690         protected function isWrongCaseCssJsPage() {
 691                 if ( $this->mTitle->isCssJsSubpage() ) {
 692                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 693                         $skins = array_merge(
 694                                 array_keys( Skin::getSkinNames() ),
 695                                 array( 'common' )
 696                         );
 697                         return !in_array( $name, $skins )
 698                                 && in_array( strtolower( $name ), $skins );
 699                 } else {
 700                         return false;
 701                 }
 702         }
 703
 704         /**
 705          * Returns whether section editing is supported for the current page.
 706          * Subclasses may override this to replace the default behavior, which is
 707          * to check ContentHandler::supportsSections.
 708          *
 709          * @return bool True if this edit page supports sections, false otherwise.
 710          */
 711         protected function isSectionEditSupported() {
 712                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 713                 return $contentHandler->supportsSections();
 714         }
 715
 716         /**
 717          * This function collects the form data and uses it to populate various member variables.
 718          * @param WebRequest $request
 719          * @throws ErrorPageError
 720          */
 721         function importFormData( &$request ) {
 722                 global $wgContLang, $wgUser;
 723
 724
 725                 # Section edit can come from either the form or a link
 726                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 727
 728                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 729                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 730                 }
 731
 732                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 733
 734                 if ( $request->wasPosted() ) {
 735                         # These fields need to be checked for encoding.
 736                         # Also remove trailing whitespace, but don't remove _initial_
 737                         # whitespace from the text boxes. This may be significant formatting.
 738                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 739                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 740                                 // Skip this if wpTextbox2 has input, it indicates that we came
 741                                 // from a conflict page with raw page text, not a custom form
 742                                 // modified by subclasses
 743                                 $textbox1 = $this->importContentFormData( $request );
 744                                 if ( $textbox1 !== null ) {
 745                                         $this->textbox1 = $textbox1;
 746                                 }
 747                         }
 748
 749                         # Truncate for whole multibyte characters
 750                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 751
 752                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 753                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 754                         # section titles.
 755                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 756
 757                         # Treat sectiontitle the same way as summary.
 758                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 759                         # currently doing double duty as both edit summary and section title. Right now this
 760                         # is just to allow API edits to work around this limitation, but this should be
 761                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 762                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 763                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 764
 765                         $this->edittime = $request->getVal( 'wpEdittime' );
 766                         $this->starttime = $request->getVal( 'wpStarttime' );
 767
 768                         $undidRev = $request->getInt( 'wpUndidRevision' );
 769                         if ( $undidRev ) {
 770                                 $this->undidRev = $undidRev;
 771                         }
 772
 773                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 774
 775                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 776                                 // wpTextbox1 field is missing, possibly due to being "too big"
 777                                 // according to some filter rules such as Suhosin's setting for
 778                                 // suhosin.request.max_value_length (d'oh)
 779                                 $this->incompleteForm = true;
 780                         } else {
 781                                 // If we receive the last parameter of the request, we can fairly
 782                                 // claim the POST request has not been truncated.
 783
 784                                 // TODO: softened the check for cutover.  Once we determine
 785                                 // that it is safe, we should complete the transition by
 786                                 // removing the "edittime" clause.
 787                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 788                                         && is_null( $this->edittime ) );
 789                         }
 790                         if ( $this->incompleteForm ) {
 791                                 # If the form is incomplete, force to preview.
 792                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 793                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 794                                 $this->preview = true;
 795                         } else {
 796                                 /* Fallback for live preview */
 797                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 798                                 $this->diff = $request->getCheck( 'wpDiff' );
 799
 800                                 // Remember whether a save was requested, so we can indicate
 801                                 // if we forced preview due to session failure.
 802                                 $this->mTriedSave = !$this->preview;
 803
 804                                 if ( $this->tokenOk( $request ) ) {
 805                                         # Some browsers will not report any submit button
 806                                         # if the user hits enter in the comment box.
 807                                         # The unmarked state will be assumed to be a save,
 808                                         # if the form seems otherwise complete.
 809                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 810                                 } elseif ( $this->diff ) {
 811                                         # Failed token check, but only requested "Show Changes".
 812                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 813                                 } else {
 814                                         # Page might be a hack attempt posted from
 815                                         # an external site. Preview instead of saving.
 816                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 817                                         $this->preview = true;
 818                                 }
 819                         }
 820                         $this->save = !$this->preview && !$this->diff;
 821                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 822                                 $this->edittime = null;
 823                         }
 824
 825                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 826                                 $this->starttime = null;
 827                         }
 828
 829                         $this->recreate = $request->getCheck( 'wpRecreate' );
 830
 831                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 832                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 833
 834                         # Don't force edit summaries when a user is editing their own user or talk page
 835                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 836                                 && $this->mTitle->getText() == $wgUser->getName()
 837                         ) {
 838                                 $this->allowBlankSummary = true;
 839                         } else {
 840                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 841                                         || !$wgUser->getOption( 'forceeditsummary' );
 842                         }
 843
 844                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 845
 846                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 847                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 848                 } else {
 849                         # Not a posted form? Start with nothing.
 850                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 851                         $this->textbox1 = '';
 852                         $this->summary = '';
 853                         $this->sectiontitle = '';
 854                         $this->edittime = '';
 855                         $this->starttime = wfTimestampNow();
 856                         $this->edit = false;
 857                         $this->preview = false;
 858                         $this->save = false;
 859                         $this->diff = false;
 860                         $this->minoredit = false;
 861                         // Watch may be overridden by request parameters
 862                         $this->watchthis = $request->getBool( 'watchthis', false );
 863                         $this->recreate = false;
 864
 865                         // When creating a new section, we can preload a section title by passing it as the
 866                         // preloadtitle parameter in the URL (Bug 13100)
 867                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 868                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 869                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 870                                 $this->summary = $request->getVal( 'preloadtitle' );
 871                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 872                                 $this->summary = $request->getText( 'summary' );
 873                                 if ( $this->summary !== '' ) {
 874                                         $this->hasPresetSummary = true;
 875                                 }
 876                         }
 877
 878                         if ( $request->getVal( 'minor' ) ) {
 879                                 $this->minoredit = true;
 880                         }
 881                 }
 882
 883                 $this->oldid = $request->getInt( 'oldid' );
 884                 $this->parentRevId = $request->getInt( 'parentRevId' );
 885
 886                 $this->bot = $request->getBool( 'bot', true );
 887                 $this->nosummary = $request->getBool( 'nosummary' );
 888
 889                 // May be overridden by revision.
 890                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 891                 // May be overridden by revision.
 892                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 893
 894                 if ( !ContentHandler::getForModelID( $this->contentModel )
 895                         ->isSupportedFormat( $this->contentFormat )
 896                 ) {
 897                         throw new ErrorPageError(
 898                                 'editpage-notsupportedcontentformat-title',
 899                                 'editpage-notsupportedcontentformat-text',
 900                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 901                         );
 902                 }
 903
 904                 /**
 905                  * @todo Check if the desired model is allowed in this namespace, and if
 906                  *   a transition from the page's current model to the new model is
 907                  *   allowed.
 908                  */
 909
 910                 $this->live = $request->getCheck( 'live' );
 911                 $this->editintro = $request->getText( 'editintro',
 912                         // Custom edit intro for new sections
 913                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 914
 915                 // Allow extensions to modify form data
 916                 Hooks::run( 'EditPage::importFormData', array( $this, $request ) );
 917
 918         }
 919
 920         /**
 921          * Subpage overridable method for extracting the page content data from the
 922          * posted form to be placed in $this->textbox1, if using customized input
 923          * this method should be overridden and return the page text that will be used
 924          * for saving, preview parsing and so on...
 925          *
 926          * @param WebRequest $request
 927          */
 928         protected function importContentFormData( &$request ) {
 929                 return; // Don't do anything, EditPage already extracted wpTextbox1
 930         }
 931
 932         /**
 933          * Initialise form fields in the object
 934          * Called on the first invocation, e.g. when a user clicks an edit link
 935          * @return bool If the requested section is valid
 936          */
 937         function initialiseForm() {
 938                 global $wgUser;
 939                 $this->edittime = $this->mArticle->getTimestamp();
 940
 941                 $content = $this->getContentObject( false ); #TODO: track content object?!
 942                 if ( $content === false ) {
 943                         return false;
 944                 }
 945                 $this->textbox1 = $this->toEditText( $content );
 946
 947                 // activate checkboxes if user wants them to be always active
 948                 # Sort out the "watch" checkbox
 949                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 950                         # Watch all edits
 951                         $this->watchthis = true;
 952                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 953                         # Watch creations
 954                         $this->watchthis = true;
 955                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 956                         # Already watched
 957                         $this->watchthis = true;
 958                 }
 959                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 960                         $this->minoredit = true;
 961                 }
 962                 if ( $this->textbox1 === false ) {
 963                         return false;
 964                 }
 965                 return true;
 966         }
 967
 968         /**
 969          * @param Content|null $def_content The default value to return
 970          *
 971          * @return Content|null Content on success, $def_content for invalid sections
 972          *
 973          * @since 1.21
 974          */
 975         protected function getContentObject( $def_content = null ) {
 976                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 977
 978
 979                 $content = false;
 980
 981                 // For message page not locally set, use the i18n message.
 982                 // For other non-existent articles, use preload text if any.
 983                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 984                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 985                                 # If this is a system message, get the default text.
 986                                 $msg = $this->mTitle->getDefaultMessageText();
 987
 988                                 $content = $this->toEditContent( $msg );
 989                         }
 990                         if ( $content === false ) {
 991                                 # If requested, preload some text.
 992                                 $preload = $wgRequest->getVal( 'preload',
 993                                         // Custom preload text for new sections
 994                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 995                                 $params = $wgRequest->getArray( 'preloadparams', array() );
 996
 997                                 $content = $this->getPreloadedContent( $preload, $params );
 998                         }
 999                 // For existing pages, get text based on "undo" or section parameters.
1000                 } else {
1001                         if ( $this->section != '' ) {
1002                                 // Get section edit text (returns $def_text for invalid sections)
1003                                 $orig = $this->getOriginalContent( $wgUser );
1004                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1005
1006                                 if ( !$content ) {
1007                                         $content = $def_content;
1008                                 }
1009                         } else {
1010                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1011                                 $undo = $wgRequest->getInt( 'undo' );
1012
1013                                 if ( $undo > 0 && $undoafter > 0 ) {
1014
1015                                         $undorev = Revision::newFromId( $undo );
1016                                         $oldrev = Revision::newFromId( $undoafter );
1017
1018                                         # Sanity check, make sure it's the right page,
1019                                         # the revisions exist and they were not deleted.
1020                                         # Otherwise, $content will be left as-is.
1021                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1022                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1023                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1024
1025                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1026
1027                                                 if ( $content === false ) {
1028                                                         # Warn the user that something went wrong
1029                                                         $undoMsg = 'failure';
1030                                                 } else {
1031                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1032                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1033                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1034
1035                                                         if ( $newContent->equals( $oldContent ) ) {
1036                                                                 # Tell the user that the undo results in no change,
1037                                                                 # i.e. the revisions were already undone.
1038                                                                 $undoMsg = 'nochange';
1039                                                                 $content = false;
1040                                                         } else {
1041                                                                 # Inform the user of our success and set an automatic edit summary
1042                                                                 $undoMsg = 'success';
1043
1044                                                                 # If we just undid one rev, use an autosummary
1045                                                                 $firstrev = $oldrev->getNext();
1046                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1047                                                                         $userText = $undorev->getUserText();
1048                                                                         if ( $userText === '' ) {
1049                                                                                 $undoSummary = wfMessage(
1050                                                                                         'undo-summary-username-hidden',
1051                                                                                         $undo
1052                                                                                 )->inContentLanguage()->text();
1053                                                                         } else {
1054                                                                                 $undoSummary = wfMessage(
1055                                                                                         'undo-summary',
1056                                                                                         $undo,
1057                                                                                         $userText
1058                                                                                 )->inContentLanguage()->text();
1059                                                                         }
1060                                                                         if ( $this->summary === '' ) {
1061                                                                                 $this->summary = $undoSummary;
1062                                                                         } else {
1063                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1064                                                                                         ->inContentLanguage()->text() . $this->summary;
1065                                                                         }
1066                                                                         $this->undidRev = $undo;
1067                                                                 }
1068                                                                 $this->formtype = 'diff';
1069                                                         }
1070                                                 }
1071                                         } else {
1072                                                 // Failed basic sanity checks.
1073                                                 // Older revisions may have been removed since the link
1074                                                 // was created, or we may simply have got bogus input.
1075                                                 $undoMsg = 'norev';
1076                                         }
1077
1078                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1079                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1080                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1081                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1082                                 }
1083
1084                                 if ( $content === false ) {
1085                                         $content = $this->getOriginalContent( $wgUser );
1086                                 }
1087                         }
1088                 }
1089
1090                 return $content;
1091         }
1092
1093         /**
1094          * Get the content of the wanted revision, without section extraction.
1095          *
1096          * The result of this function can be used to compare user's input with
1097          * section replaced in its context (using WikiPage::replaceSection())
1098          * to the original text of the edit.
1099          *
1100          * This differs from Article::getContent() that when a missing revision is
1101          * encountered the result will be null and not the
1102          * 'missing-revision' message.
1103          *
1104          * @since 1.19
1105          * @param User $user The user to get the revision for
1106          * @return Content|null
1107          */
1108         private function getOriginalContent( User $user ) {
1109                 if ( $this->section == 'new' ) {
1110                         return $this->getCurrentContent();
1111                 }
1112                 $revision = $this->mArticle->getRevisionFetched();
1113                 if ( $revision === null ) {
1114                         if ( !$this->contentModel ) {
1115                                 $this->contentModel = $this->getTitle()->getContentModel();
1116                         }
1117                         $handler = ContentHandler::getForModelID( $this->contentModel );
1118
1119                         return $handler->makeEmptyContent();
1120                 }
1121                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1122                 return $content;
1123         }
1124
1125         /**
1126          * Get the current content of the page. This is basically similar to
1127          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1128          * content object is returned instead of null.
1129          *
1130          * @since 1.21
1131          * @return Content
1132          */
1133         protected function getCurrentContent() {
1134                 $rev = $this->mArticle->getRevision();
1135                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1136
1137                 if ( $content === false || $content === null ) {
1138                         if ( !$this->contentModel ) {
1139                                 $this->contentModel = $this->getTitle()->getContentModel();
1140                         }
1141                         $handler = ContentHandler::getForModelID( $this->contentModel );
1142
1143                         return $handler->makeEmptyContent();
1144                 } else {
1145                         # nasty side-effect, but needed for consistency
1146                         $this->contentModel = $rev->getContentModel();
1147                         $this->contentFormat = $rev->getContentFormat();
1148
1149                         return $content;
1150                 }
1151         }
1152
1153         /**
1154          * Use this method before edit() to preload some content into the edit box
1155          *
1156          * @param Content $content
1157          *
1158          * @since 1.21
1159          */
1160         public function setPreloadedContent( Content $content ) {
1161                 $this->mPreloadContent = $content;
1162         }
1163
1164         /**
1165          * Get the contents to be preloaded into the box, either set by
1166          * an earlier setPreloadText() or by loading the given page.
1167          *
1168          * @param string $preload Representing the title to preload from.
1169          * @param array $params Parameters to use (interface-message style) in the preloaded text
1170          *
1171          * @return Content
1172          *
1173          * @since 1.21
1174          */
1175         protected function getPreloadedContent( $preload, $params = array() ) {
1176                 global $wgUser;
1177
1178                 if ( !empty( $this->mPreloadContent ) ) {
1179                         return $this->mPreloadContent;
1180                 }
1181
1182                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1183
1184                 if ( $preload === '' ) {
1185                         return $handler->makeEmptyContent();
1186                 }
1187
1188                 $title = Title::newFromText( $preload );
1189                 # Check for existence to avoid getting MediaWiki:Noarticletext
1190                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1191                         //TODO: somehow show a warning to the user!
1192                         return $handler->makeEmptyContent();
1193                 }
1194
1195                 $page = WikiPage::factory( $title );
1196                 if ( $page->isRedirect() ) {
1197                         $title = $page->getRedirectTarget();
1198                         # Same as before
1199                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1200                                 //TODO: somehow show a warning to the user!
1201                                 return $handler->makeEmptyContent();
1202                         }
1203                         $page = WikiPage::factory( $title );
1204                 }
1205
1206                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1207                 $content = $page->getContent( Revision::RAW );
1208
1209                 if ( !$content ) {
1210                         //TODO: somehow show a warning to the user!
1211                         return $handler->makeEmptyContent();
1212                 }
1213
1214                 if ( $content->getModel() !== $handler->getModelID() ) {
1215                         $converted = $content->convert( $handler->getModelID() );
1216
1217                         if ( !$converted ) {
1218                                 //TODO: somehow show a warning to the user!
1219                                 wfDebug( "Attempt to preload incompatible content: "
1220                                                 . "can't convert " . $content->getModel()
1221                                                 . " to " . $handler->getModelID() );
1222
1223                                 return $handler->makeEmptyContent();
1224                         }
1225
1226                         $content = $converted;
1227                 }
1228
1229                 return $content->preloadTransform( $title, $parserOptions, $params );
1230         }
1231
1232         /**
1233          * Make sure the form isn't faking a user's credentials.
1234          *
1235          * @param WebRequest $request
1236          * @return bool
1237          * @private
1238          */
1239         function tokenOk( &$request ) {
1240                 global $wgUser;
1241                 $token = $request->getVal( 'wpEditToken' );
1242                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1243                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1244                 return $this->mTokenOk;
1245         }
1246
1247         /**
1248          * Sets post-edit cookie indicating the user just saved a particular revision.
1249          *
1250          * This uses a temporary cookie for each revision ID so separate saves will never
1251          * interfere with each other.
1252          *
1253          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1254          * the redirect.  It must be clearable by JavaScript code, so it must not be
1255          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1256          * variable.
1257          *
1258          * If the variable were set on the server, it would be cached, which is unwanted
1259          * since the post-edit state should only apply to the load right after the save.
1260          *
1261          * @param int $statusValue The status value (to check for new article status)
1262          */
1263         protected function setPostEditCookie( $statusValue ) {
1264                 $revisionId = $this->mArticle->getLatest();
1265                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1266
1267                 $val = 'saved';
1268                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1269                         $val = 'created';
1270                 } elseif ( $this->oldid ) {
1271                         $val = 'restored';
1272                 }
1273
1274                 $response = RequestContext::getMain()->getRequest()->response();
1275                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1276                         'httpOnly' => false,
1277                 ) );
1278         }
1279
1280         /**
1281          * Attempt submission
1282          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1283          * @return bool False if output is done, true if the rest of the form should be displayed
1284          */
1285         public function attemptSave() {
1286                 global $wgUser;
1287
1288                 $resultDetails = false;
1289                 # Allow bots to exempt some edits from bot flagging
1290                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1291                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1292
1293                 return $this->handleStatus( $status, $resultDetails );
1294         }
1295
1296         /**
1297          * Handle status, such as after attempt save
1298          *
1299          * @param Status $status
1300          * @param array|bool $resultDetails
1301          *
1302          * @throws ErrorPageError
1303          * @return bool False, if output is done, true if rest of the form should be displayed
1304          */
1305         private function handleStatus( Status $status, $resultDetails ) {
1306                 global $wgUser, $wgOut;
1307
1308                 /**
1309                  * @todo FIXME: once the interface for internalAttemptSave() is made
1310                  *   nicer, this should use the message in $status
1311                  */
1312                 if ( $status->value == self::AS_SUCCESS_UPDATE
1313                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1314                 ) {
1315                         $this->didSave = true;
1316                         if ( !$resultDetails['nullEdit'] ) {
1317                                 $this->setPostEditCookie( $status->value );
1318                         }
1319                 }
1320
1321                 switch ( $status->value ) {
1322                         case self::AS_HOOK_ERROR_EXPECTED:
1323                         case self::AS_CONTENT_TOO_BIG:
1324                         case self::AS_ARTICLE_WAS_DELETED:
1325                         case self::AS_CONFLICT_DETECTED:
1326                         case self::AS_SUMMARY_NEEDED:
1327                         case self::AS_TEXTBOX_EMPTY:
1328                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1329                         case self::AS_END:
1330                         case self::AS_BLANK_ARTICLE:
1331                         case self::AS_SELF_REDIRECT:
1332                                 return true;
1333
1334                         case self::AS_HOOK_ERROR:
1335                                 return false;
1336
1337                         case self::AS_PARSE_ERROR:
1338                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1339                                 return true;
1340
1341                         case self::AS_SUCCESS_NEW_ARTICLE:
1342                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1343                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1344                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1345                                 return false;
1346
1347                         case self::AS_SUCCESS_UPDATE:
1348                                 $extraQuery = '';
1349                                 $sectionanchor = $resultDetails['sectionanchor'];
1350
1351                                 // Give extensions a chance to modify URL query on update
1352                                 Hooks::run(
1353                                         'ArticleUpdateBeforeRedirect',
1354                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1355                                 );
1356
1357                                 if ( $resultDetails['redirect'] ) {
1358                                         if ( $extraQuery == '' ) {
1359                                                 $extraQuery = 'redirect=no';
1360                                         } else {
1361                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1362                                         }
1363                                 }
1364                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1365                                 return false;
1366
1367                         case self::AS_SPAM_ERROR:
1368                                 $this->spamPageWithContent( $resultDetails['spam'] );
1369                                 return false;
1370
1371                         case self::AS_BLOCKED_PAGE_FOR_USER:
1372                                 throw new UserBlockedError( $wgUser->getBlock() );
1373
1374                         case self::AS_IMAGE_REDIRECT_ANON:
1375                         case self::AS_IMAGE_REDIRECT_LOGGED:
1376                                 throw new PermissionsError( 'upload' );
1377
1378                         case self::AS_READ_ONLY_PAGE_ANON:
1379                         case self::AS_READ_ONLY_PAGE_LOGGED:
1380                                 throw new PermissionsError( 'edit' );
1381
1382                         case self::AS_READ_ONLY_PAGE:
1383                                 throw new ReadOnlyError;
1384
1385                         case self::AS_RATE_LIMITED:
1386                                 throw new ThrottledError();
1387
1388                         case self::AS_NO_CREATE_PERMISSION:
1389                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1390                                 throw new PermissionsError( $permission );
1391
1392                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1393                                 throw new PermissionsError( 'editcontentmodel' );
1394
1395                         default:
1396                                 // We don't recognize $status->value. The only way that can happen
1397                                 // is if an extension hook aborted from inside ArticleSave.
1398                                 // Render the status object into $this->hookError
1399                                 // FIXME this sucks, we should just use the Status object throughout
1400                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1401                                         '</div>';
1402                                 return true;
1403                 }
1404         }
1405
1406         /**
1407          * Run hooks that can filter edits just before they get saved.
1408          *
1409          * @param Content $content The Content to filter.
1410          * @param Status $status For reporting the outcome to the caller
1411          * @param User $user The user performing the edit
1412          *
1413          * @return bool
1414          */
1415         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1416                 // Run old style post-section-merge edit filter
1417                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1418                         array( $this, $content, &$this->hookError, $this->summary ) )
1419                 ) {
1420                         # Error messages etc. could be handled within the hook...
1421                         $status->fatal( 'hookaborted' );
1422                         $status->value = self::AS_HOOK_ERROR;
1423                         return false;
1424                 } elseif ( $this->hookError != '' ) {
1425                         # ...or the hook could be expecting us to produce an error
1426                         $status->fatal( 'hookaborted' );
1427                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1428                         return false;
1429                 }
1430
1431                 // Run new style post-section-merge edit filter
1432                 if ( !Hooks::run( 'EditFilterMergedContent',
1433                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1434                                 $user, $this->minoredit ) )
1435                 ) {
1436                         # Error messages etc. could be handled within the hook...
1437                         if ( $status->isGood() ) {
1438                                 $status->fatal( 'hookaborted' );
1439                                 // Not setting $this->hookError here is a hack to allow the hook
1440                                 // to cause a return to the edit page without $this->hookError
1441                                 // being set. This is used by ConfirmEdit to display a captcha
1442                                 // without any error message cruft.
1443                         } else {
1444                                 $this->hookError = $status->getWikiText();
1445                         }
1446                         // Use the existing $status->value if the hook set it
1447                         if ( !$status->value ) {
1448                                 $status->value = self::AS_HOOK_ERROR;
1449                         }
1450                         return false;
1451                 } elseif ( !$status->isOK() ) {
1452                         # ...or the hook could be expecting us to produce an error
1453                         // FIXME this sucks, we should just use the Status object throughout
1454                         $this->hookError = $status->getWikiText();
1455                         $status->fatal( 'hookaborted' );
1456                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1457                         return false;
1458                 }
1459
1460                 return true;
1461         }
1462
1463         /**
1464          * Return the summary to be used for a new section.
1465          *
1466          * @param string $sectionanchor Set to the section anchor text
1467          * @return string
1468          */
1469         private function newSectionSummary( &$sectionanchor = null ) {
1470                 global $wgParser;
1471
1472                 if ( $this->sectiontitle !== '' ) {
1473                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1474                         // If no edit summary was specified, create one automatically from the section
1475                         // title and have it link to the new section. Otherwise, respect the summary as
1476                         // passed.
1477                         if ( $this->summary === '' ) {
1478                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1479                                 return wfMessage( 'newsectionsummary' )
1480                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1481                         }
1482                 } elseif ( $this->summary !== '' ) {
1483                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1484                         # This is a new section, so create a link to the new section
1485                         # in the revision summary.
1486                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1487                         return wfMessage( 'newsectionsummary' )
1488                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1489                 }
1490                 return $this->summary;
1491         }
1492
1493         /**
1494          * Attempt submission (no UI)
1495          *
1496          * @param array $result Array to add statuses to, currently with the
1497          *   possible keys:
1498          *   - spam (string): Spam string from content if any spam is detected by
1499          *     matchSpamRegex.
1500          *   - sectionanchor (string): Section anchor for a section save.
1501          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1502          *     false otherwise.
1503          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1504          *     revision is a redirect.
1505          * @param bool $bot True if edit is being made under the bot right.
1506          *
1507          * @return Status Status object, possibly with a message, but always with
1508          *   one of the AS_* constants in $status->value,
1509          *
1510          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1511          *   various error display idiosyncrasies. There are also lots of cases
1512          *   where error metadata is set in the object and retrieved later instead
1513          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1514          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1515          * time.
1516          */
1517         function internalAttemptSave( &$result, $bot = false ) {
1518                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1519
1520                 $status = Status::newGood();
1521
1522
1523                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1524                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1525                         $status->fatal( 'hookaborted' );
1526                         $status->value = self::AS_HOOK_ERROR;
1527                         return $status;
1528                 }
1529
1530                 $spam = $wgRequest->getText( 'wpAntispam' );
1531                 if ( $spam !== '' ) {
1532                         wfDebugLog(
1533                                 'SimpleAntiSpam',
1534                                 $wgUser->getName() .
1535                                 ' editing "' .
1536                                 $this->mTitle->getPrefixedText() .
1537                                 '" submitted bogus field "' .
1538                                 $spam .
1539                                 '"'
1540                         );
1541                         $status->fatal( 'spamprotectionmatch', false );
1542                         $status->value = self::AS_SPAM_ERROR;
1543                         return $status;
1544                 }
1545
1546                 try {
1547                         # Construct Content object
1548                         $textbox_content = $this->toEditContent( $this->textbox1 );
1549                 } catch ( MWContentSerializationException $ex ) {
1550                         $status->fatal(
1551                                 'content-failed-to-parse',
1552                                 $this->contentModel,
1553                                 $this->contentFormat,
1554                                 $ex->getMessage()
1555                         );
1556                         $status->value = self::AS_PARSE_ERROR;
1557                         return $status;
1558                 }
1559
1560                 # Check image redirect
1561                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1562                         $textbox_content->isRedirect() &&
1563                         !$wgUser->isAllowed( 'upload' )
1564                 ) {
1565                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1566                                 $status->setResult( false, $code );
1567
1568
1569                                 return $status;
1570                 }
1571
1572                 # Check for spam
1573                 $match = self::matchSummarySpamRegex( $this->summary );
1574                 if ( $match === false && $this->section == 'new' ) {
1575                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1576                         # regular summaries, it is added to the actual wikitext.
1577                         if ( $this->sectiontitle !== '' ) {
1578                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1579                                 $match = self::matchSpamRegex( $this->sectiontitle );
1580                         } else {
1581                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1582                                 # is used with the 'summary' parameter.
1583                                 $match = self::matchSpamRegex( $this->summary );
1584                         }
1585                 }
1586                 if ( $match === false ) {
1587                         $match = self::matchSpamRegex( $this->textbox1 );
1588                 }
1589                 if ( $match !== false ) {
1590                         $result['spam'] = $match;
1591                         $ip = $wgRequest->getIP();
1592                         $pdbk = $this->mTitle->getPrefixedDBkey();
1593                         $match = str_replace( "\n", '', $match );
1594                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1595                         $status->fatal( 'spamprotectionmatch', $match );
1596                         $status->value = self::AS_SPAM_ERROR;
1597                         return $status;
1598                 }
1599                 if ( !Hooks::run(
1600                         'EditFilter',
1601                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1602                 ) {
1603                         # Error messages etc. could be handled within the hook...
1604                         $status->fatal( 'hookaborted' );
1605                         $status->value = self::AS_HOOK_ERROR;
1606                         return $status;
1607                 } elseif ( $this->hookError != '' ) {
1608                         # ...or the hook could be expecting us to produce an error
1609                         $status->fatal( 'hookaborted' );
1610                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1611                         return $status;
1612                 }
1613
1614                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1615                         // Auto-block user's IP if the account was "hard" blocked
1616                         $wgUser->spreadAnyEditBlock();
1617                         # Check block state against master, thus 'false'.
1618                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1619                         return $status;
1620                 }
1621
1622                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1623                 if ( $this->kblength > $wgMaxArticleSize ) {
1624                         // Error will be displayed by showEditForm()
1625                         $this->tooBig = true;
1626                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1627                         return $status;
1628                 }
1629
1630                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1631                         if ( $wgUser->isAnon() ) {
1632                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1633                                 return $status;
1634                         } else {
1635                                 $status->fatal( 'readonlytext' );
1636                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1637                                 return $status;
1638                         }
1639                 }
1640
1641                 if ( $this->contentModel !== $this->mTitle->getContentModel()
1642                         && !$wgUser->isAllowed( 'editcontentmodel' )
1643                 ) {
1644                         $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1645                         return $status;
1646                 }
1647
1648                 if ( wfReadOnly() ) {
1649                         $status->fatal( 'readonlytext' );
1650                         $status->value = self::AS_READ_ONLY_PAGE;
1651                         return $status;
1652                 }
1653                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1654                         $status->fatal( 'actionthrottledtext' );
1655                         $status->value = self::AS_RATE_LIMITED;
1656                         return $status;
1657                 }
1658
1659                 # If the article has been deleted while editing, don't save it without
1660                 # confirmation
1661                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1662                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1663                         return $status;
1664                 }
1665
1666
1667                 # Load the page data from the master. If anything changes in the meantime,
1668                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1669                 $this->mArticle->loadPageData( 'fromdbmaster' );
1670                 $new = !$this->mArticle->exists();
1671
1672                 if ( $new ) {
1673                         // Late check for create permission, just in case *PARANOIA*
1674                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1675                                 $status->fatal( 'nocreatetext' );
1676                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1677                                 wfDebug( __METHOD__ . ": no create permission\n" );
1678                                 return $status;
1679                         }
1680
1681                         // Don't save a new page if it's blank or if it's a MediaWiki:
1682                         // message with content equivalent to default (allow empty pages
1683                         // in this case to disable messages, see bug 50124)
1684                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1685                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1686                                 $defaultText = $defaultMessageText;
1687                         } else {
1688                                 $defaultText = '';
1689                         }
1690
1691                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1692                                 $this->blankArticle = true;
1693                                 $status->fatal( 'blankarticle' );
1694                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1695                                 return $status;
1696                         }
1697
1698                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1699                                 return $status;
1700                         }
1701
1702                         $content = $textbox_content;
1703
1704                         $result['sectionanchor'] = '';
1705                         if ( $this->section == 'new' ) {
1706                                 if ( $this->sectiontitle !== '' ) {
1707                                         // Insert the section title above the content.
1708                                         $content = $content->addSectionHeader( $this->sectiontitle );
1709                                 } elseif ( $this->summary !== '' ) {
1710                                         // Insert the section title above the content.
1711                                         $content = $content->addSectionHeader( $this->summary );
1712                                 }
1713                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1714                         }
1715
1716                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1717
1718                 } else { # not $new
1719
1720                         # Article exists. Check for edit conflict.
1721
1722                         $this->mArticle->clear(); # Force reload of dates, etc.
1723                         $timestamp = $this->mArticle->getTimestamp();
1724
1725                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1726
1727                         if ( $timestamp != $this->edittime ) {
1728                                 $this->isConflict = true;
1729                                 if ( $this->section == 'new' ) {
1730                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1731                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1732                                         ) {
1733                                                 // Probably a duplicate submission of a new comment.
1734                                                 // This can happen when squid resends a request after
1735                                                 // a timeout but the first one actually went through.
1736                                                 wfDebug( __METHOD__
1737                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1738                                         } else {
1739                                                 // New comment; suppress conflict.
1740                                                 $this->isConflict = false;
1741                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1742                                         }
1743                                 } elseif ( $this->section == ''
1744                                         && Revision::userWasLastToEdit(
1745                                                 DB_MASTER, $this->mTitle->getArticleID(),
1746                                                 $wgUser->getId(), $this->edittime
1747                                         )
1748                                 ) {
1749                                         # Suppress edit conflict with self, except for section edits where merging is required.
1750                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1751                                         $this->isConflict = false;
1752                                 }
1753                         }
1754
1755                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1756                         if ( $this->sectiontitle !== '' ) {
1757                                 $sectionTitle = $this->sectiontitle;
1758                         } else {
1759                                 $sectionTitle = $this->summary;
1760                         }
1761
1762                         $content = null;
1763
1764                         if ( $this->isConflict ) {
1765                                 wfDebug( __METHOD__
1766                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1767                                         . " (article time '{$timestamp}')\n" );
1768
1769                                 $content = $this->mArticle->replaceSectionContent(
1770                                         $this->section,
1771                                         $textbox_content,
1772                                         $sectionTitle,
1773                                         $this->edittime
1774                                 );
1775                         } else {
1776                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1777                                 $content = $this->mArticle->replaceSectionContent(
1778                                         $this->section,
1779                                         $textbox_content,
1780                                         $sectionTitle
1781                                 );
1782                         }
1783
1784                         if ( is_null( $content ) ) {
1785                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1786                                 $this->isConflict = true;
1787                                 $content = $textbox_content; // do not try to merge here!
1788                         } elseif ( $this->isConflict ) {
1789                                 # Attempt merge
1790                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1791                                         // Successful merge! Maybe we should tell the user the good news?
1792                                         $this->isConflict = false;
1793                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1794                                 } else {
1795                                         $this->section = '';
1796                                         $this->textbox1 = ContentHandler::getContentText( $content );
1797                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1798                                 }
1799                         }
1800
1801                         if ( $this->isConflict ) {
1802                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1803                                 return $status;
1804                         }
1805
1806                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1807                                 return $status;
1808                         }
1809
1810                         if ( $this->section == 'new' ) {
1811                                 // Handle the user preference to force summaries here
1812                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1813                                         $this->missingSummary = true;
1814                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1815                                         $status->value = self::AS_SUMMARY_NEEDED;
1816                                         return $status;
1817                                 }
1818
1819                                 // Do not allow the user to post an empty comment
1820                                 if ( $this->textbox1 == '' ) {
1821                                         $this->missingComment = true;
1822                                         $status->fatal( 'missingcommenttext' );
1823                                         $status->value = self::AS_TEXTBOX_EMPTY;
1824                                         return $status;
1825                                 }
1826                         } elseif ( !$this->allowBlankSummary
1827                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1828                                 && !$content->isRedirect()
1829                                 && md5( $this->summary ) == $this->autoSumm
1830                         ) {
1831                                 $this->missingSummary = true;
1832                                 $status->fatal( 'missingsummary' );
1833                                 $status->value = self::AS_SUMMARY_NEEDED;
1834                                 return $status;
1835                         }
1836
1837                         # All's well
1838                         $sectionanchor = '';
1839                         if ( $this->section == 'new' ) {
1840                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1841                         } elseif ( $this->section != '' ) {
1842                                 # Try to get a section anchor from the section source, redirect
1843                                 # to edited section if header found.
1844                                 # XXX: Might be better to integrate this into Article::replaceSection
1845                                 # for duplicate heading checking and maybe parsing.
1846                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1847                                 # We can't deal with anchors, includes, html etc in the header for now,
1848                                 # headline would need to be parsed to improve this.
1849                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1850                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1851                                 }
1852                         }
1853                         $result['sectionanchor'] = $sectionanchor;
1854
1855                         // Save errors may fall down to the edit form, but we've now
1856                         // merged the section into full text. Clear the section field
1857                         // so that later submission of conflict forms won't try to
1858                         // replace that into a duplicated mess.
1859                         $this->textbox1 = $this->toEditText( $content );
1860                         $this->section = '';
1861
1862                         $status->value = self::AS_SUCCESS_UPDATE;
1863                 }
1864
1865                 if ( !$this->allowSelfRedirect
1866                         && $content->isRedirect()
1867                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1868                 ) {
1869                         // If the page already redirects to itself, don't warn.
1870                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1871                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1872                                 $this->selfRedirect = true;
1873                                 $status->fatal( 'selfredirect' );
1874                                 $status->value = self::AS_SELF_REDIRECT;
1875                                 return $status;
1876                         }
1877                 }
1878
1879                 // Check for length errors again now that the section is merged in
1880                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1881                 if ( $this->kblength > $wgMaxArticleSize ) {
1882                         $this->tooBig = true;
1883                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1884                         return $status;
1885                 }
1886
1887                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1888                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1889                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1890                         ( $bot ? EDIT_FORCE_BOT : 0 );
1891
1892                 $doEditStatus = $this->mArticle->doEditContent(
1893                         $content,
1894                         $this->summary,
1895                         $flags,
1896                         false,
1897                         null,
1898                         $content->getDefaultFormat()
1899                 );
1900
1901                 if ( !$doEditStatus->isOK() ) {
1902                         // Failure from doEdit()
1903                         // Show the edit conflict page for certain recognized errors from doEdit(),
1904                         // but don't show it for errors from extension hooks
1905                         $errors = $doEditStatus->getErrorsArray();
1906                         if ( in_array( $errors[0][0],
1907                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1908                         ) {
1909                                 $this->isConflict = true;
1910                                 // Destroys data doEdit() put in $status->value but who cares
1911                                 $doEditStatus->value = self::AS_END;
1912                         }
1913                         return $doEditStatus;
1914                 }
1915
1916                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1917                 if ( $result['nullEdit'] ) {
1918                         // We don't know if it was a null edit until now, so increment here
1919                         $wgUser->pingLimiter( 'linkpurge' );
1920                 }
1921                 $result['redirect'] = $content->isRedirect();
1922                 $this->updateWatchlist();
1923                 return $status;
1924         }
1925
1926         /**
1927          * Register the change of watch status
1928          */
1929         protected function updateWatchlist() {
1930                 global $wgUser;
1931
1932                 if ( $wgUser->isLoggedIn()
1933                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1934                 ) {
1935                         $fname = __METHOD__;
1936                         $title = $this->mTitle;
1937                         $watch = $this->watchthis;
1938
1939                         // Do this in its own transaction to reduce contention...
1940                         $dbw = wfGetDB( DB_MASTER );
1941                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1942                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1943                         } );
1944                 }
1945         }
1946
1947         /**
1948          * Attempts to do 3-way merge of edit content with a base revision
1949          * and current content, in case of edit conflict, in whichever way appropriate
1950          * for the content type.
1951          *
1952          * @since 1.21
1953          *
1954          * @param Content $editContent
1955          *
1956          * @return bool
1957          */
1958         private function mergeChangesIntoContent( &$editContent ) {
1959
1960                 $db = wfGetDB( DB_MASTER );
1961
1962                 // This is the revision the editor started from
1963                 $baseRevision = $this->getBaseRevision();
1964                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1965
1966                 if ( is_null( $baseContent ) ) {
1967                         return false;
1968                 }
1969
1970                 // The current state, we want to merge updates into it
1971                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1972                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1973
1974                 if ( is_null( $currentContent ) ) {
1975                         return false;
1976                 }
1977
1978                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1979
1980                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1981
1982                 if ( $result ) {
1983                         $editContent = $result;
1984                         return true;
1985                 }
1986
1987                 return false;
1988         }
1989
1990         /**
1991          * @return Revision
1992          */
1993         function getBaseRevision() {
1994                 if ( !$this->mBaseRevision ) {
1995                         $db = wfGetDB( DB_MASTER );
1996                         $this->mBaseRevision = Revision::loadFromTimestamp(
1997                                 $db, $this->mTitle, $this->edittime );
1998                 }
1999                 return $this->mBaseRevision;
2000         }
2001
2002         /**
2003          * Check given input text against $wgSpamRegex, and return the text of the first match.
2004          *
2005          * @param string $text
2006          *
2007          * @return string|bool Matching string or false
2008          */
2009         public static function matchSpamRegex( $text ) {
2010                 global $wgSpamRegex;
2011                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2012                 $regexes = (array)$wgSpamRegex;
2013                 return self::matchSpamRegexInternal( $text, $regexes );
2014         }
2015
2016         /**
2017          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2018          *
2019          * @param string $text
2020          *
2021          * @return string|bool Matching string or false
2022          */
2023         public static function matchSummarySpamRegex( $text ) {
2024                 global $wgSummarySpamRegex;
2025                 $regexes = (array)$wgSummarySpamRegex;
2026                 return self::matchSpamRegexInternal( $text, $regexes );
2027         }
2028
2029         /**
2030          * @param string $text
2031          * @param array $regexes
2032          * @return bool|string
2033          */
2034         protected static function matchSpamRegexInternal( $text, $regexes ) {
2035                 foreach ( $regexes as $regex ) {
2036                         $matches = array();
2037                         if ( preg_match( $regex, $text, $matches ) ) {
2038                                 return $matches[0];
2039                         }
2040                 }
2041                 return false;
2042         }
2043
2044         function setHeaders() {
2045                 global $wgOut, $wgUser, $wgAjaxEditStash;
2046
2047                 $wgOut->addModules( 'mediawiki.action.edit' );
2048                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2049
2050                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2051                         // The addition of default buttons is handled by getEditToolbar() which
2052                         // has its own dependency on this module. The call here ensures the module
2053                         // is loaded in time (it has position "top") for other modules to register
2054                         // buttons (e.g. extensions, gadgets, user scripts).
2055                         $wgOut->addModules( 'mediawiki.toolbar' );
2056                 }
2057
2058                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2059                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2060                 }
2061
2062                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2063                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2064                 }
2065
2066                 if ( $wgAjaxEditStash ) {
2067                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2068                 }
2069
2070                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2071
2072                 # Enabled article-related sidebar, toplinks, etc.
2073                 $wgOut->setArticleRelated( true );
2074
2075                 $contextTitle = $this->getContextTitle();
2076                 if ( $this->isConflict ) {
2077                         $msg = 'editconflict';
2078                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2079                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2080                 } else {
2081                         $msg = $contextTitle->exists()
2082                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2083                                         && $contextTitle->getDefaultMessageText() !== false
2084                                 )
2085                                 ? 'editing'
2086                                 : 'creating';
2087                 }
2088
2089                 # Use the title defined by DISPLAYTITLE magic word when present
2090                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2091                 if ( $displayTitle === false ) {
2092                         $displayTitle = $contextTitle->getPrefixedText();
2093                 }
2094                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2095         }
2096
2097         /**
2098          * Show all applicable editing introductions
2099          */
2100         protected function showIntro() {
2101                 global $wgOut, $wgUser;
2102                 if ( $this->suppressIntro ) {
2103                         return;
2104                 }
2105
2106                 $namespace = $this->mTitle->getNamespace();
2107
2108                 if ( $namespace == NS_MEDIAWIKI ) {
2109                         # Show a warning if editing an interface message
2110                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2111                         # If this is a default message (but not css or js),
2112                         # show a hint that it is translatable on translatewiki.net
2113                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2114                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2115                         ) {
2116                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2117                                 if ( $defaultMessageText !== false ) {
2118                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2119                                                 'translateinterface' );
2120                                 }
2121                         }
2122                 } elseif ( $namespace == NS_FILE ) {
2123                         # Show a hint to shared repo
2124                         $file = wfFindFile( $this->mTitle );
2125                         if ( $file && !$file->isLocal() ) {
2126                                 $descUrl = $file->getDescriptionUrl();
2127                                 # there must be a description url to show a hint to shared repo
2128                                 if ( $descUrl ) {
2129                                         if ( !$this->mTitle->exists() ) {
2130                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2131                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2132                                                 ) );
2133                                         } else {
2134                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2135                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2136                                                 ) );
2137                                         }
2138                                 }
2139                         }
2140                 }
2141
2142                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2143                 # Show log extract when the user is currently blocked
2144                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2145                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2146                         $username = $parts[0];
2147                         $user = User::newFromName( $username, false /* allow IP users*/ );
2148                         $ip = User::isIP( $username );
2149                         $block = Block::newFromTarget( $user, $user );
2150                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2151                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2152                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2153                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2154                                 # Show log extract if the user is currently blocked
2155                                 LogEventsList::showLogExtract(
2156                                         $wgOut,
2157                                         'block',
2158                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2159                                         '',
2160                                         array(
2161                                                 'lim' => 1,
2162                                                 'showIfEmpty' => false,
2163                                                 'msgKey' => array(
2164                                                         'blocked-notice-logextract',
2165                                                         $user->getName() # Support GENDER in notice
2166                                                 )
2167                                         )
2168                                 );
2169                         }
2170                 }
2171                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2172                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2173                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2174                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2175                         ) );
2176                         if ( $wgUser->isLoggedIn() ) {
2177                                 $wgOut->wrapWikiMsg(
2178                                         // Suppress the external link icon, consider the help url an internal one
2179                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2180                                         array(
2181                                                 'newarticletext',
2182                                                 $helpLink
2183                                         )
2184                                 );
2185                         } else {
2186                                 $wgOut->wrapWikiMsg(
2187                                         // Suppress the external link icon, consider the help url an internal one
2188                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2189                                         array(
2190                                                 'newarticletextanon',
2191                                                 $helpLink
2192                                         )
2193                                 );
2194                         }
2195                 }
2196                 # Give a notice if the user is editing a deleted/moved page...
2197                 if ( !$this->mTitle->exists() ) {
2198                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2199                                 '',
2200                                 array(
2201                                         'lim' => 10,
2202                                         'conds' => array( "log_action != 'revision'" ),
2203                                         'showIfEmpty' => false,
2204                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2205                                 )
2206                         );
2207                 }
2208         }
2209
2210         /**
2211          * Attempt to show a custom editing introduction, if supplied
2212          *
2213          * @return bool
2214          */
2215         protected function showCustomIntro() {
2216                 if ( $this->editintro ) {
2217                         $title = Title::newFromText( $this->editintro );
2218                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2219                                 global $wgOut;
2220                                 // Added using template syntax, to take <noinclude>'s into account.
2221                                 $wgOut->addWikiTextTitleTidy(
2222                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2223                                         $this->mTitle
2224                                 );
2225                                 return true;
2226                         }
2227                 }
2228                 return false;
2229         }
2230
2231         /**
2232          * Gets an editable textual representation of $content.
2233          * The textual representation can be turned by into a Content object by the
2234          * toEditContent() method.
2235          *
2236          * If $content is null or false or a string, $content is returned unchanged.
2237          *
2238          * If the given Content object is not of a type that can be edited using
2239          * the text base EditPage, an exception will be raised. Set
2240          * $this->allowNonTextContent to true to allow editing of non-textual
2241          * content.
2242          *
2243          * @param Content|null|bool|string $content
2244          * @return string The editable text form of the content.
2245          *
2246          * @throws MWException If $content is not an instance of TextContent and
2247          *   $this->allowNonTextContent is not true.
2248          */
2249         protected function toEditText( $content ) {
2250                 if ( $content === null || $content === false || is_string( $content ) ) {
2251                         return $content;
2252                 }
2253
2254                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2255                         throw new MWException( 'This content model is not supported: '
2256                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2257                 }
2258
2259                 return $content->serialize( $this->contentFormat );
2260         }
2261
2262         /**
2263          * Turns the given text into a Content object by unserializing it.
2264          *
2265          * If the resulting Content object is not of a type that can be edited using
2266          * the text base EditPage, an exception will be raised. Set
2267          * $this->allowNonTextContent to true to allow editing of non-textual
2268          * content.
2269          *
2270          * @param string|null|bool $text Text to unserialize
2271          * @return Content The content object created from $text. If $text was false
2272          *   or null, false resp. null will be  returned instead.
2273          *
2274          * @throws MWException If unserializing the text results in a Content
2275          *   object that is not an instance of TextContent and
2276          *   $this->allowNonTextContent is not true.
2277          */
2278         protected function toEditContent( $text ) {
2279                 if ( $text === false || $text === null ) {
2280                         return $text;
2281                 }
2282
2283                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2284                         $this->contentModel, $this->contentFormat );
2285
2286                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2287                         throw new MWException( 'This content model is not supported: '
2288                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2289                 }
2290
2291                 return $content;
2292         }
2293
2294         /**
2295          * Send the edit form and related headers to $wgOut
2296          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2297          *     during form output near the top, for captchas and the like.
2298          *
2299          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2300          * use the EditPage::showEditForm:fields hook instead.
2301          */
2302         function showEditForm( $formCallback = null ) {
2303                 global $wgOut, $wgUser;
2304
2305
2306                 # need to parse the preview early so that we know which templates are used,
2307                 # otherwise users with "show preview after edit box" will get a blank list
2308                 # we parse this near the beginning so that setHeaders can do the title
2309                 # setting work instead of leaving it in getPreviewText
2310                 $previewOutput = '';
2311                 if ( $this->formtype == 'preview' ) {
2312                         $previewOutput = $this->getPreviewText();
2313                 }
2314
2315                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2316
2317                 $this->setHeaders();
2318
2319                 if ( $this->showHeader() === false ) {
2320                         return;
2321                 }
2322
2323                 $wgOut->addHTML( $this->editFormPageTop );
2324
2325                 if ( $wgUser->getOption( 'previewontop' ) ) {
2326                         $this->displayPreviewArea( $previewOutput, true );
2327                 }
2328
2329                 $wgOut->addHTML( $this->editFormTextTop );
2330
2331                 $showToolbar = true;
2332                 if ( $this->wasDeletedSinceLastEdit() ) {
2333                         if ( $this->formtype == 'save' ) {
2334                                 // Hide the toolbar and edit area, user can click preview to get it back
2335                                 // Add an confirmation checkbox and explanation.
2336                                 $showToolbar = false;
2337                         } else {
2338                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2339                                         'deletedwhileediting' );
2340                         }
2341                 }
2342
2343                 // @todo add EditForm plugin interface and use it here!
2344                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2345                 $wgOut->addHTML( Html::openElement(
2346                         'form',
2347                         array(
2348                                 'id' => self::EDITFORM_ID,
2349                                 'name' => self::EDITFORM_ID,
2350                                 'method' => 'post',
2351                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2352                                 'enctype' => 'multipart/form-data'
2353                         )
2354                 ) );
2355
2356                 if ( is_callable( $formCallback ) ) {
2357                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2358                         call_user_func_array( $formCallback, array( &$wgOut ) );
2359                 }
2360
2361                 // Add an empty field to trip up spambots
2362                 $wgOut->addHTML(
2363                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2364                         . Html::rawElement(
2365                                 'label',
2366                                 array( 'for' => 'wpAntiSpam' ),
2367                                 wfMessage( 'simpleantispam-label' )->parse()
2368                         )
2369                         . Xml::element(
2370                                 'input',
2371                                 array(
2372                                         'type' => 'text',
2373                                         'name' => 'wpAntispam',
2374                                         'id' => 'wpAntispam',
2375                                         'value' => ''
2376                                 )
2377                         )
2378                         . Xml::closeElement( 'div' )
2379                 );
2380
2381                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2382
2383                 // Put these up at the top to ensure they aren't lost on early form submission
2384                 $this->showFormBeforeText();
2385
2386                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2387                         $username = $this->lastDelete->user_name;
2388                         $comment = $this->lastDelete->log_comment;
2389
2390                         // It is better to not parse the comment at all than to have templates expanded in the middle
2391                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2392                         $key = $comment === ''
2393                                 ? 'confirmrecreate-noreason'
2394                                 : 'confirmrecreate';
2395                         $wgOut->addHTML(
2396                                 '<div class="mw-confirm-recreate">' .
2397                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2398                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2399                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2400                                 ) .
2401                                 '</div>'
2402                         );
2403                 }
2404
2405                 # When the summary is hidden, also hide them on preview/show changes
2406                 if ( $this->nosummary ) {
2407                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2408                 }
2409
2410                 # If a blank edit summary was previously provided, and the appropriate
2411                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2412                 # user being bounced back more than once in the event that a summary
2413                 # is not required.
2414                 #####
2415                 # For a bit more sophisticated detection of blank summaries, hash the
2416                 # automatic one and pass that in the hidden field wpAutoSummary.
2417                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2418                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2419                 }
2420
2421                 if ( $this->undidRev ) {
2422                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2423                 }
2424
2425                 if ( $this->selfRedirect ) {
2426                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2427                 }
2428
2429                 if ( $this->hasPresetSummary ) {
2430                         // If a summary has been preset using &summary= we don't want to prompt for
2431                         // a different summary. Only prompt for a summary if the summary is blanked.
2432                         // (Bug 17416)
2433                         $this->autoSumm = md5( '' );
2434                 }
2435
2436                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2437                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2438
2439                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2440                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2441                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2442
2443                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2444                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2445
2446                 if ( $this->section == 'new' ) {
2447                         $this->showSummaryInput( true, $this->summary );
2448                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2449                 }
2450
2451                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2452
2453                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2454                         $wgOut->addHTML( EditPage::getEditToolbar() );
2455                 }
2456
2457                 if ( $this->blankArticle ) {
2458                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2459                 }
2460
2461                 if ( $this->isConflict ) {
2462                         // In an edit conflict bypass the overridable content form method
2463                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2464                         // resolved between page source edits and custom ui edits using the
2465                         // custom edit ui.
2466                         $this->textbox2 = $this->textbox1;
2467
2468                         $content = $this->getCurrentContent();
2469                         $this->textbox1 = $this->toEditText( $content );
2470
2471                         $this->showTextbox1();
2472                 } else {
2473                         $this->showContentForm();
2474                 }
2475
2476                 $wgOut->addHTML( $this->editFormTextAfterContent );
2477
2478                 $this->showStandardInputs();
2479
2480                 $this->showFormAfterText();
2481
2482                 $this->showTosSummary();
2483
2484                 $this->showEditTools();
2485
2486                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2487
2488                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2489                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2490
2491                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2492                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2493
2494                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2495                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2496
2497                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2498
2499                 if ( $this->isConflict ) {
2500                         try {
2501                                 $this->showConflict();
2502                         } catch ( MWContentSerializationException $ex ) {
2503                                 // this can't really happen, but be nice if it does.
2504                                 $msg = wfMessage(
2505                                         'content-failed-to-parse',
2506                                         $this->contentModel,
2507                                         $this->contentFormat,
2508                                         $ex->getMessage()
2509                                 );
2510                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2511                         }
2512                 }
2513
2514                 // Marker for detecting truncated form data.  This must be the last
2515                 // parameter sent in order to be of use, so do not move me.
2516                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2517                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2518
2519                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2520                         $this->displayPreviewArea( $previewOutput, false );
2521                 }
2522
2523         }
2524
2525         /**
2526          * Extract the section title from current section text, if any.
2527          *
2528          * @param string $text
2529          * @return string|bool String or false
2530          */
2531         public static function extractSectionTitle( $text ) {
2532                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2533                 if ( !empty( $matches[2] ) ) {
2534                         global $wgParser;
2535                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2536                 } else {
2537                         return false;
2538                 }
2539         }
2540
2541         /**
2542          * @return bool
2543          */
2544         protected function showHeader() {
2545                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2546                 global $wgAllowUserCss, $wgAllowUserJs;
2547
2548                 if ( $this->mTitle->isTalkPage() ) {
2549                         $wgOut->addWikiMsg( 'talkpagetext' );
2550                 }
2551
2552                 // Add edit notices
2553                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2554
2555                 if ( $this->isConflict ) {
2556                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2557                         $this->edittime = $this->mArticle->getTimestamp();
2558                 } else {
2559                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2560                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2561                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2562                                 // Someone is welcome to try refactoring though
2563                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2564                                 return false;
2565                         }
2566
2567                         if ( $this->section != '' && $this->section != 'new' ) {
2568                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2569                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2570                                         if ( $sectionTitle !== false ) {
2571                                                 $this->summary = "/* $sectionTitle */ ";
2572                                         }
2573                                 }
2574                         }
2575
2576                         if ( $this->missingComment ) {
2577                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2578                         }
2579
2580                         if ( $this->missingSummary && $this->section != 'new' ) {
2581                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2582                         }
2583
2584                         if ( $this->missingSummary && $this->section == 'new' ) {
2585                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2586                         }
2587
2588                         if ( $this->blankArticle ) {
2589                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2590                         }
2591
2592                         if ( $this->selfRedirect ) {
2593                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2594                         }
2595
2596                         if ( $this->hookError !== '' ) {
2597                                 $wgOut->addWikiText( $this->hookError );
2598                         }
2599
2600                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2601                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2602                         }
2603
2604                         if ( $this->section != 'new' ) {
2605                                 $revision = $this->mArticle->getRevisionFetched();
2606                                 if ( $revision ) {
2607                                         // Let sysop know that this will make private content public if saved
2608
2609                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2610                                                 $wgOut->wrapWikiMsg(
2611                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2612                                                         'rev-deleted-text-permission'
2613                                                 );
2614                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2615                                                 $wgOut->wrapWikiMsg(
2616                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2617                                                         'rev-deleted-text-view'
2618                                                 );
2619                                         }
2620
2621                                         if ( !$revision->isCurrent() ) {
2622                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2623                                                 $wgOut->addWikiMsg( 'editingold' );
2624                                         }
2625                                 } elseif ( $this->mTitle->exists() ) {
2626                                         // Something went wrong
2627
2628                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2629                                                 array( 'missing-revision', $this->oldid ) );
2630                                 }
2631                         }
2632                 }
2633
2634                 if ( wfReadOnly() ) {
2635                         $wgOut->wrapWikiMsg(
2636                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2637                                 array( 'readonlywarning', wfReadOnlyReason() )
2638                         );
2639                 } elseif ( $wgUser->isAnon() ) {
2640                         if ( $this->formtype != 'preview' ) {
2641                                 $wgOut->wrapWikiMsg(
2642                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2643                                         array( 'anoneditwarning',
2644                                                 // Log-in link
2645                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2646                                                 // Sign-up link
2647                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2648                                 );
2649                         } else {
2650                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2651                                         'anonpreviewwarning'
2652                                 );
2653                         }
2654                 } else {
2655                         if ( $this->isCssJsSubpage ) {
2656                                 # Check the skin exists
2657                                 if ( $this->isWrongCaseCssJsPage ) {
2658                                         $wgOut->wrapWikiMsg(
2659                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2660                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2661                                         );
2662                                 }
2663                                 if ( $this->formtype !== 'preview' ) {
2664                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2665                                                 $wgOut->wrapWikiMsg(
2666                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2667                                                         array( 'usercssyoucanpreview' )
2668                                                 );
2669                                         }
2670
2671                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2672                                                 $wgOut->wrapWikiMsg(
2673                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2674                                                         array( 'userjsyoucanpreview' )
2675                                                 );
2676                                         }
2677                                 }
2678                         }
2679                 }
2680
2681                 if ( $this->mTitle->isProtected( 'edit' ) &&
2682                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2683                 ) {
2684                         # Is the title semi-protected?
2685                         if ( $this->mTitle->isSemiProtected() ) {
2686                                 $noticeMsg = 'semiprotectedpagewarning';
2687                         } else {
2688                                 # Then it must be protected based on static groups (regular)
2689                                 $noticeMsg = 'protectedpagewarning';
2690                         }
2691                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2692                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2693                 }
2694                 if ( $this->mTitle->isCascadeProtected() ) {
2695                         # Is this page under cascading protection from some source pages?
2696                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2697                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2698                         $cascadeSourcesCount = count( $cascadeSources );
2699                         if ( $cascadeSourcesCount > 0 ) {
2700                                 # Explain, and list the titles responsible
2701                                 foreach ( $cascadeSources as $page ) {
2702                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2703                                 }
2704                         }
2705                         $notice .= '</div>';
2706                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2707                 }
2708                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2709                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2710                                 array( 'lim' => 1,
2711                                         'showIfEmpty' => false,
2712                                         'msgKey' => array( 'titleprotectedwarning' ),
2713                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2714                 }
2715
2716                 if ( $this->kblength === false ) {
2717                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2718                 }
2719
2720                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2721                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2722                                 array(
2723                                         'longpageerror',
2724                                         $wgLang->formatNum( $this->kblength ),
2725                                         $wgLang->formatNum( $wgMaxArticleSize )
2726                                 )
2727                         );
2728                 } else {
2729                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2730                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2731                                         array(
2732                                                 'longpage-hint',
2733                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2734                                                 strlen( $this->textbox1 )
2735                                         )
2736                                 );
2737                         }
2738                 }
2739                 # Add header copyright warning
2740                 $this->showHeaderCopyrightWarning();
2741
2742                 return true;
2743         }
2744
2745         /**
2746          * Standard summary input and label (wgSummary), abstracted so EditPage
2747          * subclasses may reorganize the form.
2748          * Note that you do not need to worry about the label's for=, it will be
2749          * inferred by the id given to the input. You can remove them both by
2750          * passing array( 'id' => false ) to $userInputAttrs.
2751          *
2752          * @param string $summary The value of the summary input
2753          * @param string $labelText The html to place inside the label
2754          * @param array $inputAttrs Array of attrs to use on the input
2755          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2756          *
2757          * @return array An array in the format array( $label, $input )
2758          */
2759         function getSummaryInput( $summary = "", $labelText = null,
2760                 $inputAttrs = null, $spanLabelAttrs = null
2761         ) {
2762                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2763                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2764                         'id' => 'wpSummary',
2765                         'maxlength' => '200',
2766                         'tabindex' => '1',
2767                         'size' => 60,
2768                         'spellcheck' => 'true',
2769                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2770
2771                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2772                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2773                         'id' => "wpSummaryLabel"
2774                 );
2775
2776                 $label = null;
2777                 if ( $labelText ) {
2778                         $label = Xml::tags(
2779                                 'label',
2780                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2781                                 $labelText
2782                         );
2783                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2784                 }
2785
2786                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2787
2788                 return array( $label, $input );
2789         }
2790
2791         /**
2792          * @param bool $isSubjectPreview True if this is the section subject/title
2793          *   up top, or false if this is the comment summary
2794          *   down below the textarea
2795          * @param string $summary The text of the summary to display
2796          */
2797         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2798                 global $wgOut, $wgContLang;
2799                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2800                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2801                 if ( $isSubjectPreview ) {
2802                         if ( $this->nosummary ) {
2803                                 return;
2804                         }
2805                 } else {
2806                         if ( !$this->mShowSummaryField ) {
2807                                 return;
2808                         }
2809                 }
2810                 $summary = $wgContLang->recodeForEdit( $summary );
2811                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2812                 list( $label, $input ) = $this->getSummaryInput(
2813                         $summary,
2814                         $labelText,
2815                         array( 'class' => $summaryClass ),
2816                         array()
2817                 );
2818                 $wgOut->addHTML( "{$label} {$input}" );
2819         }
2820
2821         /**
2822          * @param bool $isSubjectPreview True if this is the section subject/title
2823          *   up top, or false if this is the comment summary
2824          *   down below the textarea
2825          * @param string $summary The text of the summary to display
2826          * @return string
2827          */
2828         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2829                 // avoid spaces in preview, gets always trimmed on save
2830                 $summary = trim( $summary );
2831                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2832                         return "";
2833                 }
2834
2835                 global $wgParser;
2836
2837                 if ( $isSubjectPreview ) {
2838                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2839                                 ->inContentLanguage()->text();
2840                 }
2841
2842                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2843
2844                 $summary = wfMessage( $message )->parse()
2845                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2846                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2847         }
2848
2849         protected function showFormBeforeText() {
2850                 global $wgOut;
2851                 $section = htmlspecialchars( $this->section );
2852                 $wgOut->addHTML( <<<HTML
2853 <input type='hidden' value="{$section}" name="wpSection"/>
2854 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2855 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2856 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2857
2858 HTML
2859                 );
2860                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2861                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2862                 }
2863         }
2864
2865         protected function showFormAfterText() {
2866                 global $wgOut, $wgUser;
2867                 /**
2868                  * To make it harder for someone to slip a user a page
2869                  * which submits an edit form to the wiki without their
2870                  * knowledge, a random token is associated with the login
2871                  * session. If it's not passed back with the submission,
2872                  * we won't save the page, or render user JavaScript and
2873                  * CSS previews.
2874                  *
2875                  * For anon editors, who may not have a session, we just
2876                  * include the constant suffix to prevent editing from
2877                  * broken text-mangling proxies.
2878                  */
2879                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2880         }
2881
2882         /**
2883          * Subpage overridable method for printing the form for page content editing
2884          * By default this simply outputs wpTextbox1
2885          * Subclasses can override this to provide a custom UI for editing;
2886          * be it a form, or simply wpTextbox1 with a modified content that will be
2887          * reverse modified when extracted from the post data.
2888          * Note that this is basically the inverse for importContentFormData
2889          */
2890         protected function showContentForm() {
2891                 $this->showTextbox1();
2892         }
2893
2894         /**
2895          * Method to output wpTextbox1
2896          * The $textoverride method can be used by subclasses overriding showContentForm
2897          * to pass back to this method.
2898          *
2899          * @param array $customAttribs Array of html attributes to use in the textarea
2900          * @param string $textoverride Optional text to override $this->textarea1 with
2901          */
2902         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2903                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2904                         $attribs = array( 'style' => 'display:none;' );
2905                 } else {
2906                         $classes = array(); // Textarea CSS
2907                         if ( $this->mTitle->isProtected( 'edit' ) &&
2908                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2909                         ) {
2910                                 # Is the title semi-protected?
2911                                 if ( $this->mTitle->isSemiProtected() ) {
2912                                         $classes[] = 'mw-textarea-sprotected';
2913                                 } else {
2914                                         # Then it must be protected based on static groups (regular)
2915                                         $classes[] = 'mw-textarea-protected';
2916                                 }
2917                                 # Is the title cascade-protected?
2918                                 if ( $this->mTitle->isCascadeProtected() ) {
2919                                         $classes[] = 'mw-textarea-cprotected';
2920                                 }
2921                         }
2922
2923                         $attribs = array( 'tabindex' => 1 );
2924
2925                         if ( is_array( $customAttribs ) ) {
2926                                 $attribs += $customAttribs;
2927                         }
2928
2929                         if ( count( $classes ) ) {
2930                                 if ( isset( $attribs['class'] ) ) {
2931                                         $classes[] = $attribs['class'];
2932                                 }
2933                                 $attribs['class'] = implode( ' ', $classes );
2934                         }
2935                 }
2936
2937                 $this->showTextbox(
2938                         $textoverride !== null ? $textoverride : $this->textbox1,
2939                         'wpTextbox1',
2940                         $attribs
2941                 );
2942         }
2943
2944         protected function showTextbox2() {
2945                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2946         }
2947
2948         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2949                 global $wgOut, $wgUser;
2950
2951                 $wikitext = $this->safeUnicodeOutput( $text );
2952                 if ( strval( $wikitext ) !== '' ) {
2953                         // Ensure there's a newline at the end, otherwise adding lines
2954                         // is awkward.
2955                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2956                         // mode will show an extra newline. A bit annoying.
2957                         $wikitext .= "\n";
2958                 }
2959
2960                 $attribs = $customAttribs + array(
2961                         'accesskey' => ',',
2962                         'id' => $name,
2963                         'cols' => $wgUser->getIntOption( 'cols' ),
2964                         'rows' => $wgUser->getIntOption( 'rows' ),
2965                         // Avoid PHP notices when appending preferences
2966                         // (appending allows customAttribs['style'] to still work).
2967                         'style' => ''
2968                 );
2969
2970                 $pageLang = $this->mTitle->getPageLanguage();
2971                 $attribs['lang'] = $pageLang->getHtmlCode();
2972                 $attribs['dir'] = $pageLang->getDir();
2973
2974                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2975         }
2976
2977         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2978                 global $wgOut;
2979                 $classes = array();
2980                 if ( $isOnTop ) {
2981                         $classes[] = 'ontop';
2982                 }
2983
2984                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2985
2986                 if ( $this->formtype != 'preview' ) {
2987                         $attribs['style'] = 'display: none;';
2988                 }
2989
2990                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2991
2992                 if ( $this->formtype == 'preview' ) {
2993                         $this->showPreview( $previewOutput );
2994                 }
2995
2996                 $wgOut->addHTML( '</div>' );
2997
2998                 if ( $this->formtype == 'diff' ) {
2999                         try {
3000                                 $this->showDiff();
3001                         } catch ( MWContentSerializationException $ex ) {
3002                                 $msg = wfMessage(
3003                                         'content-failed-to-parse',
3004                                         $this->contentModel,
3005                                         $this->contentFormat,
3006                                         $ex->getMessage()
3007                                 );
3008                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3009                         }
3010                 }
3011         }
3012
3013         /**
3014          * Append preview output to $wgOut.
3015          * Includes category rendering if this is a category page.
3016          *
3017          * @param string $text The HTML to be output for the preview.
3018          */
3019         protected function showPreview( $text ) {
3020                 global $wgOut;
3021                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3022                         $this->mArticle->openShowCategory();
3023                 }
3024                 # This hook seems slightly odd here, but makes things more
3025                 # consistent for extensions.
3026                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3027                 $wgOut->addHTML( $text );
3028                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3029                         $this->mArticle->closeShowCategory();
3030                 }
3031         }
3032
3033         /**
3034          * Get a diff between the current contents of the edit box and the
3035          * version of the page we're editing from.
3036          *
3037          * If this is a section edit, we'll replace the section as for final
3038          * save and then make a comparison.
3039          */
3040         function showDiff() {
3041                 global $wgUser, $wgContLang, $wgOut;
3042
3043                 $oldtitlemsg = 'currentrev';
3044                 # if message does not exist, show diff against the preloaded default
3045                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3046                         $oldtext = $this->mTitle->getDefaultMessageText();
3047                         if ( $oldtext !== false ) {
3048                                 $oldtitlemsg = 'defaultmessagetext';
3049                                 $oldContent = $this->toEditContent( $oldtext );
3050                         } else {
3051                                 $oldContent = null;
3052                         }
3053                 } else {
3054                         $oldContent = $this->getCurrentContent();
3055                 }
3056
3057                 $textboxContent = $this->toEditContent( $this->textbox1 );
3058
3059                 $newContent = $this->mArticle->replaceSectionContent(
3060                                                         $this->section, $textboxContent,
3061                                                         $this->summary, $this->edittime );
3062
3063                 if ( $newContent ) {
3064                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3065                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3066
3067                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3068                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3069                 }
3070
3071                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3072                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3073                         $newtitle = wfMessage( 'yourtext' )->parse();
3074
3075                         if ( !$oldContent ) {
3076                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3077                         }
3078
3079                         if ( !$newContent ) {
3080                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3081                         }
3082
3083                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3084                         $de->setContent( $oldContent, $newContent );
3085
3086                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3087                         $de->showDiffStyle();
3088                 } else {
3089                         $difftext = '';
3090                 }
3091
3092                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3093         }
3094
3095         /**
3096          * Show the header copyright warning.
3097          */
3098         protected function showHeaderCopyrightWarning() {
3099                 $msg = 'editpage-head-copy-warn';
3100                 if ( !wfMessage( $msg )->isDisabled() ) {
3101                         global $wgOut;
3102                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3103                                 'editpage-head-copy-warn' );
3104                 }
3105         }
3106
3107         /**
3108          * Give a chance for site and per-namespace customizations of
3109          * terms of service summary link that might exist separately
3110          * from the copyright notice.
3111          *
3112          * This will display between the save button and the edit tools,
3113          * so should remain short!
3114          */
3115         protected function showTosSummary() {
3116                 $msg = 'editpage-tos-summary';
3117                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3118                 if ( !wfMessage( $msg )->isDisabled() ) {
3119                         global $wgOut;
3120                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3121                         $wgOut->addWikiMsg( $msg );
3122                         $wgOut->addHTML( '</div>' );
3123                 }
3124         }
3125
3126         protected function showEditTools() {
3127                 global $wgOut;
3128                 $wgOut->addHTML( '<div class="mw-editTools">' .
3129                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3130                         '</div>' );
3131         }
3132
3133         /**
3134          * Get the copyright warning
3135          *
3136          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3137          * @return string
3138          */
3139         protected function getCopywarn() {
3140                 return self::getCopyrightWarning( $this->mTitle );
3141         }
3142
3143         /**
3144          * Get the copyright warning, by default returns wikitext
3145          *
3146          * @param Title $title
3147          * @param string $format Output format, valid values are any function of a Message object
3148          * @return string
3149          */
3150         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3151                 global $wgRightsText;
3152                 if ( $wgRightsText ) {
3153                         $copywarnMsg = array( 'copyrightwarning',
3154                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3155                                 $wgRightsText );
3156                 } else {
3157                         $copywarnMsg = array( 'copyrightwarning2',
3158                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3159                 }
3160                 // Allow for site and per-namespace customization of contribution/copyright notice.
3161                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3162
3163                 return "<div id=\"editpage-copywarn\">\n" .
3164                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3165         }
3166
3167         /**
3168          * Get the Limit report for page previews
3169          *
3170          * @since 1.22
3171          * @param ParserOutput $output ParserOutput object from the parse
3172          * @return string HTML
3173          */
3174         public static function getPreviewLimitReport( $output ) {
3175                 if ( !$output || !$output->getLimitReportData() ) {
3176                         return '';
3177                 }
3178
3179
3180                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3181                         wfMessage( 'limitreport-title' )->parseAsBlock()
3182                 );
3183
3184                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3185                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3186
3187                 $limitReport .= Html::openElement( 'table', array(
3188                         'class' => 'preview-limit-report wikitable'
3189                 ) ) .
3190                         Html::openElement( 'tbody' );
3191
3192                 foreach ( $output->getLimitReportData() as $key => $value ) {
3193                         if ( Hooks::run( 'ParserLimitReportFormat',
3194                                 array( $key, &$value, &$limitReport, true, true )
3195                         ) ) {
3196                                 $keyMsg = wfMessage( $key );
3197                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3198                                 if ( !$valueMsg->exists() ) {
3199                                         $valueMsg = new RawMessage( '$1' );
3200                                 }
3201                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3202                                         $limitReport .= Html::openElement( 'tr' ) .
3203                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3204                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3205                                                 Html::closeElement( 'tr' );
3206                                 }
3207                         }
3208                 }
3209
3210                 $limitReport .= Html::closeElement( 'tbody' ) .
3211                         Html::closeElement( 'table' ) .
3212                         Html::closeElement( 'div' );
3213
3214
3215                 return $limitReport;
3216         }
3217
3218         protected function showStandardInputs( &$tabindex = 2 ) {
3219                 global $wgOut;
3220                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3221
3222                 if ( $this->section != 'new' ) {
3223                         $this->showSummaryInput( false, $this->summary );
3224                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3225                 }
3226
3227                 $checkboxes = $this->getCheckboxes( $tabindex,
3228                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3229                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3230
3231                 // Show copyright warning.
3232                 $wgOut->addWikiText( $this->getCopywarn() );
3233                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3234
3235                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3236                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3237
3238                 $cancel = $this->getCancelLink();
3239                 if ( $cancel !== '' ) {
3240                         $cancel .= Html::element( 'span',
3241                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3242                                 wfMessage( 'pipe-separator' )->text() );
3243                 }
3244
3245                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3246                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3247                 $attrs = array(
3248                         'target' => 'helpwindow',
3249                         'href' => $edithelpurl,
3250                 );
3251                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3252                         $attrs, array( 'mw-ui-quiet' ) ) .
3253                         wfMessage( 'word-separator' )->escaped() .
3254                         wfMessage( 'newwindow' )->parse();
3255
3256                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3257                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3258                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3259
3260                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3261
3262                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3263         }
3264
3265         /**
3266          * Show an edit conflict. textbox1 is already shown in showEditForm().
3267          * If you want to use another entry point to this function, be careful.
3268          */
3269         protected function showConflict() {
3270                 global $wgOut;
3271
3272                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3273                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3274
3275                         $content1 = $this->toEditContent( $this->textbox1 );
3276                         $content2 = $this->toEditContent( $this->textbox2 );
3277
3278                         $handler = ContentHandler::getForModelID( $this->contentModel );
3279                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3280                         $de->setContent( $content2, $content1 );
3281                         $de->showDiff(
3282                                 wfMessage( 'yourtext' )->parse(),
3283                                 wfMessage( 'storedversion' )->text()
3284                         );
3285
3286                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3287                         $this->showTextbox2();
3288                 }
3289         }
3290
3291         /**
3292          * @return string
3293          */
3294         public function getCancelLink() {
3295                 $cancelParams = array();
3296                 if ( !$this->isConflict && $this->oldid > 0 ) {
3297                         $cancelParams['oldid'] = $this->oldid;
3298                 }
3299                 $attrs = array( 'id' => 'mw-editform-cancel' );
3300
3301                 return Linker::linkKnown(
3302                         $this->getContextTitle(),
3303                         wfMessage( 'cancel' )->parse(),
3304                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3305                         $cancelParams
3306                 );
3307         }
3308
3309         /**
3310          * Returns the URL to use in the form's action attribute.
3311          * This is used by EditPage subclasses when simply customizing the action
3312          * variable in the constructor is not enough. This can be used when the
3313          * EditPage lives inside of a Special page rather than a custom page action.
3314          *
3315          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3316          * @return string
3317          */
3318         protected function getActionURL( Title $title ) {
3319                 return $title->getLocalURL( array( 'action' => $this->action ) );
3320         }
3321
3322         /**
3323          * Check if a page was deleted while the user was editing it, before submit.
3324          * Note that we rely on the logging table, which hasn't been always there,
3325          * but that doesn't matter, because this only applies to brand new
3326          * deletes.
3327          * @return bool
3328          */
3329         protected function wasDeletedSinceLastEdit() {
3330                 if ( $this->deletedSinceEdit !== null ) {
3331                         return $this->deletedSinceEdit;
3332                 }
3333
3334                 $this->deletedSinceEdit = false;
3335
3336                 if ( $this->mTitle->isDeletedQuick() ) {
3337                         $this->lastDelete = $this->getLastDelete();
3338                         if ( $this->lastDelete ) {
3339                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3340                                 if ( $deleteTime > $this->starttime ) {
3341                                         $this->deletedSinceEdit = true;
3342                                 }
3343                         }
3344                 }
3345
3346                 return $this->deletedSinceEdit;
3347         }
3348
3349         /**
3350          * @return bool|stdClass
3351          */
3352         protected function getLastDelete() {
3353                 $dbr = wfGetDB( DB_SLAVE );
3354                 $data = $dbr->selectRow(
3355                         array( 'logging', 'user' ),
3356                         array(
3357                                 'log_type',
3358                                 'log_action',
3359                                 'log_timestamp',
3360                                 'log_user',
3361                                 'log_namespace',
3362                                 'log_title',
3363                                 'log_comment',
3364                                 'log_params',
3365                                 'log_deleted',
3366                                 'user_name'
3367                         ), array(
3368                                 'log_namespace' => $this->mTitle->getNamespace(),
3369                                 'log_title' => $this->mTitle->getDBkey(),
3370                                 'log_type' => 'delete',
3371                                 'log_action' => 'delete',
3372                                 'user_id=log_user'
3373                         ),
3374                         __METHOD__,
3375                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3376                 );
3377                 // Quick paranoid permission checks...
3378                 if ( is_object( $data ) ) {
3379                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3380                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3381                         }
3382
3383                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3384                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3385                         }
3386                 }
3387
3388                 return $data;
3389         }
3390
3391         /**
3392          * Get the rendered text for previewing.
3393          * @throws MWException
3394          * @return string
3395          */
3396         function getPreviewText() {
3397                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3398                 global $wgAllowUserCss, $wgAllowUserJs;
3399
3400
3401                 if ( $wgRawHtml && !$this->mTokenOk ) {
3402                         // Could be an offsite preview attempt. This is very unsafe if
3403                         // HTML is enabled, as it could be an attack.
3404                         $parsedNote = '';
3405                         if ( $this->textbox1 !== '' ) {
3406                                 // Do not put big scary notice, if previewing the empty
3407                                 // string, which happens when you initially edit
3408                                 // a category page, due to automatic preview-on-open.
3409                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3410                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3411                         }
3412                         return $parsedNote;
3413                 }
3414
3415                 $note = '';
3416
3417                 try {
3418                         $content = $this->toEditContent( $this->textbox1 );
3419
3420                         $previewHTML = '';
3421                         if ( !Hooks::run(
3422                                 'AlternateEditPreview',
3423                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3424                         ) {
3425                                 return $previewHTML;
3426                         }
3427
3428                         # provide a anchor link to the editform
3429                         $continueEditing = '<span class="mw-continue-editing">' .
3430                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3431                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3432                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3433                                 if ( $this->mTokenOkExceptSuffix ) {
3434                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3435                                 } else {
3436                                         $note = wfMessage( 'session_fail_preview' )->plain();
3437                                 }
3438                         } elseif ( $this->incompleteForm ) {
3439                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3440                         } else {
3441                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3442                         }
3443
3444                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3445                         $parserOptions->setIsPreview( true );
3446                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3447
3448                         # don't parse non-wikitext pages, show message about preview
3449                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3450                                 if ( $this->mTitle->isCssJsSubpage() ) {
3451                                         $level = 'user';
3452                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3453                                         $level = 'site';
3454                                 } else {
3455                                         $level = false;
3456                                 }
3457
3458                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3459                                         $format = 'css';
3460                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3461                                                 $format = false;
3462                                         }
3463                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3464                                         $format = 'js';
3465                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3466                                                 $format = false;
3467                                         }
3468                                 } else {
3469                                         $format = false;
3470                                 }
3471
3472                                 # Used messages to make sure grep find them:
3473                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3474                                 if ( $level && $format ) {
3475                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3476                                                 wfMessage( "{$level}{$format}preview" )->text() .
3477                                                 ' ' . $continueEditing . "</div>";
3478                                 }
3479                         }
3480
3481                         # If we're adding a comment, we need to show the
3482                         # summary as the headline
3483                         if ( $this->section === "new" && $this->summary !== "" ) {
3484                                 $content = $content->addSectionHeader( $this->summary );
3485                         }
3486
3487                         $hook_args = array( $this, &$content );
3488                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3489                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3490
3491                         $parserOptions->enableLimitReport();
3492
3493                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3494                         # But it's now deprecated, so never mind
3495
3496                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3497                         $scopedCallback = $parserOptions->setupFakeRevision(
3498                                 $this->mTitle, $pstContent, $wgUser );
3499                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3500
3501                         # Try to stash the edit for the final submission step
3502                         # @todo: different date format preferences cause cache misses
3503                         ApiStashEdit::stashEditFromPreview(
3504                                 $this->getArticle(), $content, $pstContent,
3505                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3506                         );
3507
3508                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3509                         $previewHTML = $parserOutput->getText();
3510                         $this->mParserOutput = $parserOutput;
3511                         $wgOut->addParserOutputMetadata( $parserOutput );
3512
3513                         if ( count( $parserOutput->getWarnings() ) ) {
3514                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3515                         }
3516                 } catch ( MWContentSerializationException $ex ) {
3517                         $m = wfMessage(
3518                                 'content-failed-to-parse',
3519                                 $this->contentModel,
3520                                 $this->contentFormat,
3521                                 $ex->getMessage()
3522                         );
3523                         $note .= "\n\n" . $m->parse();
3524                         $previewHTML = '';
3525                 }
3526
3527                 if ( $this->isConflict ) {
3528                         $conflict = '<h2 id="mw-previewconflict">'
3529                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3530                 } else {
3531                         $conflict = '<hr />';
3532                 }
3533
3534                 $previewhead = "<div class='previewnote'>\n" .
3535                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3536                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3537
3538                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3539                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3540                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3541                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3542
3543                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3544         }
3545
3546         /**
3547          * @return array
3548          */
3549         function getTemplates() {
3550                 if ( $this->preview || $this->section != '' ) {
3551                         $templates = array();
3552                         if ( !isset( $this->mParserOutput ) ) {
3553                                 return $templates;
3554                         }
3555                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3556                                 foreach ( array_keys( $template ) as $dbk ) {
3557                                         $templates[] = Title::makeTitle( $ns, $dbk );
3558                                 }
3559                         }
3560                         return $templates;
3561                 } else {
3562                         return $this->mTitle->getTemplateLinksFrom();
3563                 }
3564         }
3565
3566         /**
3567          * Shows a bulletin board style toolbar for common editing functions.
3568          * It can be disabled in the user preferences.
3569          *
3570          * @return string
3571          */
3572         static function getEditToolbar() {
3573                 global $wgContLang, $wgOut;
3574                 global $wgEnableUploads, $wgForeignFileRepos;
3575
3576                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3577
3578                 /**
3579                  * $toolarray is an array of arrays each of which includes the
3580                  * opening tag, the closing tag, optionally a sample text that is
3581                  * inserted between the two when no selection is highlighted
3582                  * and.  The tip text is shown when the user moves the mouse
3583                  * over the button.
3584                  *
3585                  * Images are defined in ResourceLoaderEditToolbarModule.
3586                  */
3587                 $toolarray = array(
3588                         array(
3589                                 'id'     => 'mw-editbutton-bold',
3590                                 'open'   => '\'\'\'',
3591                                 'close'  => '\'\'\'',
3592                                 'sample' => wfMessage( 'bold_sample' )->text(),
3593                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3594                         ),
3595                         array(
3596                                 'id'     => 'mw-editbutton-italic',
3597                                 'open'   => '\'\'',
3598                                 'close'  => '\'\'',
3599                                 'sample' => wfMessage( 'italic_sample' )->text(),
3600                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3601                         ),
3602                         array(
3603                                 'id'     => 'mw-editbutton-link',
3604                                 'open'   => '[[',
3605                                 'close'  => ']]',
3606                                 'sample' => wfMessage( 'link_sample' )->text(),
3607                                 'tip'    => wfMessage( 'link_tip' )->text(),
3608                         ),
3609                         array(
3610                                 'id'     => 'mw-editbutton-extlink',
3611                                 'open'   => '[',
3612                                 'close'  => ']',
3613                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3614                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3615                         ),
3616                         array(
3617                                 'id'     => 'mw-editbutton-headline',
3618                                 'open'   => "\n== ",
3619                                 'close'  => " ==\n",
3620                                 'sample' => wfMessage( 'headline_sample' )->text(),
3621                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3622                         ),
3623                         $imagesAvailable ? array(
3624                                 'id'     => 'mw-editbutton-image',
3625                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3626                                 'close'  => ']]',
3627                                 'sample' => wfMessage( 'image_sample' )->text(),
3628                                 'tip'    => wfMessage( 'image_tip' )->text(),
3629                         ) : false,
3630                         $imagesAvailable ? array(
3631                                 'id'     => 'mw-editbutton-media',
3632                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3633                                 'close'  => ']]',
3634                                 'sample' => wfMessage( 'media_sample' )->text(),
3635                                 'tip'    => wfMessage( 'media_tip' )->text(),
3636                         ) : false,
3637                         array(
3638                                 'id'     => 'mw-editbutton-nowiki',
3639                                 'open'   => "<nowiki>",
3640                                 'close'  => "</nowiki>",
3641                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3642                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3643                         ),
3644                         array(
3645                                 'id'     => 'mw-editbutton-signature',
3646                                 'open'   => '--~~~~',
3647                                 'close'  => '',
3648                                 'sample' => '',
3649                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3650                         ),
3651                         array(
3652                                 'id'     => 'mw-editbutton-hr',
3653                                 'open'   => "\n----\n",
3654                                 'close'  => '',
3655                                 'sample' => '',
3656                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3657                         )
3658                 );
3659
3660                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3661                 foreach ( $toolarray as $tool ) {
3662                         if ( !$tool ) {
3663                                 continue;
3664                         }
3665
3666                         $params = array(
3667                                 // Images are defined in ResourceLoaderEditToolbarModule
3668                                 false,
3669                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3670                                 // Older browsers show a "speedtip" type message only for ALT.
3671                                 // Ideally these should be different, realistically they
3672                                 // probably don't need to be.
3673                                 $tool['tip'],
3674                                 $tool['open'],
3675                                 $tool['close'],
3676                                 $tool['sample'],
3677                                 $tool['id'],
3678                         );
3679
3680                         $script .= Xml::encodeJsCall(
3681                                 'mw.toolbar.addButton',
3682                                 $params,
3683                                 ResourceLoader::inDebugMode()
3684                         );
3685                 }
3686
3687                 $script .= '});';
3688                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3689
3690                 $toolbar = '<div id="toolbar"></div>';
3691
3692                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3693
3694                 return $toolbar;
3695         }
3696
3697         /**
3698          * Returns an array of html code of the following checkboxes:
3699          * minor and watch
3700          *
3701          * @param int $tabindex Current tabindex
3702          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3703          *                 status of the checkbox
3704          *
3705          * @return array
3706          */
3707         public function getCheckboxes( &$tabindex, $checked ) {
3708                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3709
3710                 $checkboxes = array();
3711
3712                 // don't show the minor edit checkbox if it's a new page or section
3713                 if ( !$this->isNew ) {
3714                         $checkboxes['minor'] = '';
3715                         $minorLabel = wfMessage( 'minoredit' )->parse();
3716                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3717                                 $attribs = array(
3718                                         'tabindex' => ++$tabindex,
3719                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3720                                         'id' => 'wpMinoredit',
3721                                 );
3722                                 $minorEditHtml =
3723                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3724                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3725                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3726                                         ">{$minorLabel}</label>";
3727
3728                                 if ( $wgUseMediaWikiUIEverywhere ) {
3729                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3730                                                 $minorEditHtml .
3731                                         Html::closeElement( 'div' );
3732                                 } else {
3733                                         $checkboxes['minor'] = $minorEditHtml;
3734                                 }
3735                         }
3736                 }
3737
3738                 $watchLabel = wfMessage( 'watchthis' )->parse();
3739                 $checkboxes['watch'] = '';
3740                 if ( $wgUser->isLoggedIn() ) {
3741                         $attribs = array(
3742                                 'tabindex' => ++$tabindex,
3743                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3744                                 'id' => 'wpWatchthis',
3745                         );
3746                         $watchThisHtml =
3747                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3748                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3749                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3750                                 ">{$watchLabel}</label>";
3751                         if ( $wgUseMediaWikiUIEverywhere ) {
3752                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3753                                         $watchThisHtml .
3754                                         Html::closeElement( 'div' );
3755                         } else {
3756                                 $checkboxes['watch'] = $watchThisHtml;
3757                         }
3758                 }
3759                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3760                 return $checkboxes;
3761         }
3762
3763         /**
3764          * Returns an array of html code of the following buttons:
3765          * save, diff, preview and live
3766          *
3767          * @param int $tabindex Current tabindex
3768          *
3769          * @return array
3770          */
3771         public function getEditButtons( &$tabindex ) {
3772                 $buttons = array();
3773
3774                 $attribs = array(
3775                         'id' => 'wpSave',
3776                         'name' => 'wpSave',
3777                         'tabindex' => ++$tabindex,
3778                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3779                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3780                         $attribs, array( 'mw-ui-constructive' ) );
3781
3782                 ++$tabindex; // use the same for preview and live preview
3783                 $attribs = array(
3784                         'id' => 'wpPreview',
3785                         'name' => 'wpPreview',
3786                         'tabindex' => $tabindex,
3787                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3788                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3789                         $attribs );
3790                 $buttons['live'] = '';
3791
3792                 $attribs = array(
3793                         'id' => 'wpDiff',
3794                         'name' => 'wpDiff',
3795                         'tabindex' => ++$tabindex,
3796                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3797                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3798                         $attribs );
3799
3800                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3801                 return $buttons;
3802         }
3803
3804         /**
3805          * Output preview text only. This can be sucked into the edit page
3806          * via JavaScript, and saves the server time rendering the skin as
3807          * well as theoretically being more robust on the client (doesn't
3808          * disturb the edit box's undo history, won't eat your text on
3809          * failure, etc).
3810          *
3811          * @todo This doesn't include category or interlanguage links.
3812          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3813          *       or something...</s>" that might also require more skin
3814          *       initialization, so check whether that's a problem.
3815          */
3816         function livePreview() {
3817                 global $wgOut;
3818                 $wgOut->disable();
3819                 header( 'Content-type: text/xml; charset=utf-8' );
3820                 header( 'Cache-control: no-cache' );
3821
3822                 $previewText = $this->getPreviewText();
3823                 #$categories = $skin->getCategoryLinks();
3824
3825                 $s =
3826                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3827                         Xml::tags( 'livepreview', null,
3828                                 Xml::element( 'preview', null, $previewText )
3829                                 #.      Xml::element( 'category', null, $categories )
3830                         );
3831                 echo $s;
3832         }
3833
3834         /**
3835          * Creates a basic error page which informs the user that
3836          * they have attempted to edit a nonexistent section.
3837          */
3838         function noSuchSectionPage() {
3839                 global $wgOut;
3840
3841                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3842
3843                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3844                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3845                 $wgOut->addHTML( $res );
3846
3847                 $wgOut->returnToMain( false, $this->mTitle );
3848         }
3849
3850         /**
3851          * Show "your edit contains spam" page with your diff and text
3852          *
3853          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3854          */
3855         public function spamPageWithContent( $match = false ) {
3856                 global $wgOut, $wgLang;
3857                 $this->textbox2 = $this->textbox1;
3858
3859                 if ( is_array( $match ) ) {
3860                         $match = $wgLang->listToText( $match );
3861                 }
3862                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3863
3864                 $wgOut->addHTML( '<div id="spamprotected">' );
3865                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3866                 if ( $match ) {
3867                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3868                 }
3869                 $wgOut->addHTML( '</div>' );
3870
3871                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3872                 $this->showDiff();
3873
3874                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3875                 $this->showTextbox2();
3876
3877                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3878         }
3879
3880         /**
3881          * Check if the browser is on a blacklist of user-agents known to
3882          * mangle UTF-8 data on form submission. Returns true if Unicode
3883          * should make it through, false if it's known to be a problem.
3884          * @return bool
3885          */
3886         private function checkUnicodeCompliantBrowser() {
3887                 global $wgBrowserBlackList, $wgRequest;
3888
3889                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3890                 if ( $currentbrowser === false ) {
3891                         // No User-Agent header sent? Trust it by default...
3892                         return true;
3893                 }
3894
3895                 foreach ( $wgBrowserBlackList as $browser ) {
3896                         if ( preg_match( $browser, $currentbrowser ) ) {
3897                                 return false;
3898                         }
3899                 }
3900                 return true;
3901         }
3902
3903         /**
3904          * Filter an input field through a Unicode de-armoring process if it
3905          * came from an old browser with known broken Unicode editing issues.
3906          *
3907          * @param WebRequest $request
3908          * @param string $field
3909          * @return string
3910          */
3911         protected function safeUnicodeInput( $request, $field ) {
3912                 $text = rtrim( $request->getText( $field ) );
3913                 return $request->getBool( 'safemode' )
3914                         ? $this->unmakeSafe( $text )
3915                         : $text;
3916         }
3917
3918         /**
3919          * Filter an output field through a Unicode armoring process if it is
3920          * going to an old browser with known broken Unicode editing issues.
3921          *
3922          * @param string $text
3923          * @return string
3924          */
3925         protected function safeUnicodeOutput( $text ) {
3926                 global $wgContLang;
3927                 $codedText = $wgContLang->recodeForEdit( $text );
3928                 return $this->checkUnicodeCompliantBrowser()
3929                         ? $codedText
3930                         : $this->makeSafe( $codedText );
3931         }
3932
3933         /**
3934          * A number of web browsers are known to corrupt non-ASCII characters
3935          * in a UTF-8 text editing environment. To protect against this,
3936          * detected browsers will be served an armored version of the text,
3937          * with non-ASCII chars converted to numeric HTML character references.
3938          *
3939          * Preexisting such character references will have a 0 added to them
3940          * to ensure that round-trips do not alter the original data.
3941          *
3942          * @param string $invalue
3943          * @return string
3944          */
3945         private function makeSafe( $invalue ) {
3946                 // Armor existing references for reversibility.
3947                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3948
3949                 $bytesleft = 0;
3950                 $result = "";
3951                 $working = 0;
3952                 $valueLength = strlen( $invalue );
3953                 for ( $i = 0; $i < $valueLength; $i++ ) {
3954                         $bytevalue = ord( $invalue[$i] );
3955                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3956                                 $result .= chr( $bytevalue );
3957                                 $bytesleft = 0;
3958                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3959                                 $working = $working << 6;
3960                                 $working += ( $bytevalue & 0x3F );
3961                                 $bytesleft--;
3962                                 if ( $bytesleft <= 0 ) {
3963                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3964                                 }
3965                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3966                                 $working = $bytevalue & 0x1F;
3967                                 $bytesleft = 1;
3968                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3969                                 $working = $bytevalue & 0x0F;
3970                                 $bytesleft = 2;
3971                         } else { // 1111 0xxx
3972                                 $working = $bytevalue & 0x07;
3973                                 $bytesleft = 3;
3974                         }
3975                 }
3976                 return $result;
3977         }
3978
3979         /**
3980          * Reverse the previously applied transliteration of non-ASCII characters
3981          * back to UTF-8. Used to protect data from corruption by broken web browsers
3982          * as listed in $wgBrowserBlackList.
3983          *
3984          * @param string $invalue
3985          * @return string
3986          */
3987         private function unmakeSafe( $invalue ) {
3988                 $result = "";
3989                 $valueLength = strlen( $invalue );
3990                 for ( $i = 0; $i < $valueLength; $i++ ) {
3991                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3992                                 $i += 3;
3993                                 $hexstring = "";
3994                                 do {
3995                                         $hexstring .= $invalue[$i];
3996                                         $i++;
3997                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3998
3999                                 // Do some sanity checks. These aren't needed for reversibility,
4000                                 // but should help keep the breakage down if the editor
4001                                 // breaks one of the entities whilst editing.
4002                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4003                                         $codepoint = hexdec( $hexstring );
4004                                         $result .= codepointToUtf8( $codepoint );
4005                                 } else {
4006                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4007                                 }
4008                         } else {
4009                                 $result .= substr( $invalue, $i, 1 );
4010                         }
4011                 }
4012                 // reverse the transform that we made for reversibility reasons.
4013                 return strtr( $result, array( "&#x0" => "&#x" ) );
4014         }
4015 }