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: can't parse content
 149          */
 150         const AS_PARSE_ERROR = 240;
 151
 152         /**
 153          * HTML id and name for the beginning of the edit form.
 154          */
 155         const EDITFORM_ID = 'editform';
 156
 157         /**
 158          * Prefix of key for cookie used to pass post-edit state.
 159          * The revision id edited is added after this
 160          */
 161         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 162
 163         /**
 164          * Duration of PostEdit cookie, in seconds.
 165          * The cookie will be removed instantly if the JavaScript runs.
 166          *
 167          * Otherwise, though, we don't want the cookies to accumulate.
 168          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 169          * limit of only 20 cookies per domain. This still applies at least to some
 170          * versions of IE without full updates:
 171          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 172          *
 173          * A value of 20 minutes should be enough to take into account slow loads and minor
 174          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 175          */
 176         const POST_EDIT_COOKIE_DURATION = 1200;
 177
 178         /** @var Article */
 179         public $mArticle;
 180
 181         /** @var Title */
 182         public $mTitle;
 183
 184         /** @var null|Title */
 185         private $mContextTitle = null;
 186
 187         /** @var string */
 188         protected $action = 'submit';
 189
 190         /** @var bool */
 191         public $isConflict = false;
 192
 193         /** @var bool */
 194         public $isCssJsSubpage = false;
 195
 196         /** @var bool */
 197         public $isCssSubpage = false;
 198
 199         /** @var bool */
 200         public $isJsSubpage = false;
 201
 202         /** @var bool */
 203         protected $isWrongCaseCssJsPage = false;
 204
 205         /** @var bool New page or new section */
 206         protected $isNew = false;
 207
 208         /** @var bool */
 209         protected $deletedSinceEdit;
 210
 211         /** @var string */
 212         public $formtype;
 213
 214         /** @var bool */
 215         public $firsttime;
 216
 217         /** @var bool|stdClass */
 218         protected $lastDelete;
 219
 220         /** @var bool
 221          * This is public because SemanticForms uses it (bug 67522).
 222          * However, please consider using this property publicly
 223          * to be deprecated.
 224          * @protected
 225          */
 226         public $mTokenOk = false;
 227
 228         /** @var bool */
 229         protected $mTokenOkExceptSuffix = false;
 230
 231         /** @var bool */
 232         protected $mTriedSave = false;
 233
 234         /** @var bool */
 235         protected $incompleteForm = false;
 236
 237         /** @var bool */
 238         protected $tooBig = false;
 239
 240         /** @var bool */
 241         protected $kblength = false;
 242
 243         /** @var bool */
 244         protected $missingComment = false;
 245
 246         /** @var bool */
 247         protected $missingSummary = false;
 248
 249         /** @var bool */
 250         protected $allowBlankSummary = false;
 251
 252         /** @var bool */
 253         protected $blankArticle = false;
 254
 255         /** @var bool */
 256         protected $allowBlankArticle = false;
 257
 258         /** @var string */
 259         protected $autoSumm = '';
 260
 261         /** @var string */
 262         public $hookError = '';
 263
 264         /** @var ParserOutput */
 265         protected $mParserOutput;
 266
 267         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 268         protected $hasPresetSummary = false;
 269
 270         /** @var bool */
 271         protected $mBaseRevision = false;
 272
 273         /** @var bool */
 274         public $mShowSummaryField = true;
 275
 276         # Form values
 277
 278         /** @var bool */
 279         public $save = false;
 280
 281         /** @var bool */
 282         public $preview = false;
 283
 284         /** @var bool */
 285         protected $diff = false;
 286
 287         /** @var bool */
 288         public $minoredit = false;
 289
 290         /** @var bool */
 291         protected $watchthis = false;
 292
 293         /** @var bool */
 294         protected $recreate = false;
 295
 296         /** @var string */
 297         public $textbox1 = '';
 298
 299         /** @var string */
 300         public $textbox2 = '';
 301
 302         /** @var string */
 303         public $summary = '';
 304
 305         /** @var bool */
 306         protected $nosummary = false;
 307
 308         /** @var string */
 309         public $edittime = '';
 310
 311         /** @var string */
 312         public $section = '';
 313
 314         /** @var string */
 315         public $sectiontitle = '';
 316
 317         /** @var string */
 318         protected $starttime = '';
 319
 320         /** @var int */
 321         public $oldid = 0;
 322
 323         /** @var string */
 324         protected $editintro = '';
 325
 326         /** @var null */
 327         public $scrolltop = null;
 328
 329         /** @var bool */
 330         public $bot = true;
 331
 332         /** @var null|string */
 333         public $contentModel = null;
 334
 335         /** @var null|string */
 336         public $contentFormat = null;
 337
 338         # Placeholders for text injection by hooks (must be HTML)
 339         # extensions should take care to _append_ to the present value
 340
 341         /** @var string Before even the preview */
 342         public $editFormPageTop = '';
 343         public $editFormTextTop = '';
 344         public $editFormTextBeforeContent = '';
 345         public $editFormTextAfterWarn = '';
 346         public $editFormTextAfterTools = '';
 347         public $editFormTextBottom = '';
 348         public $editFormTextAfterContent = '';
 349         public $previewTextAfterContent = '';
 350         public $mPreloadContent = null;
 351
 352         /* $didSave should be set to true whenever an article was successfully altered. */
 353         public $didSave = false;
 354         public $undidRev = 0;
 355
 356         public $suppressIntro = false;
 357
 358         /** @var bool Set to true to allow editing of non-text content types. */
 359         public $allowNonTextContent = false;
 360
 361         /** @var bool */
 362         protected $edit;
 363
 364         /** @var bool */
 365         public $live;
 366
 367         /**
 368          * @param Article $article
 369          */
 370         public function __construct( Article $article ) {
 371                 $this->mArticle = $article;
 372                 $this->mTitle = $article->getTitle();
 373
 374                 $this->contentModel = $this->mTitle->getContentModel();
 375
 376                 $handler = ContentHandler::getForModelID( $this->contentModel );
 377                 $this->contentFormat = $handler->getDefaultFormat();
 378         }
 379
 380         /**
 381          * @return Article
 382          */
 383         public function getArticle() {
 384                 return $this->mArticle;
 385         }
 386
 387         /**
 388          * @since 1.19
 389          * @return Title
 390          */
 391         public function getTitle() {
 392                 return $this->mTitle;
 393         }
 394
 395         /**
 396          * Set the context Title object
 397          *
 398          * @param Title|null $title Title object or null
 399          */
 400         public function setContextTitle( $title ) {
 401                 $this->mContextTitle = $title;
 402         }
 403
 404         /**
 405          * Get the context title object.
 406          * If not set, $wgTitle will be returned. This behavior might change in
 407          * the future to return $this->mTitle instead.
 408          *
 409          * @return Title
 410          */
 411         public function getContextTitle() {
 412                 if ( is_null( $this->mContextTitle ) ) {
 413                         global $wgTitle;
 414                         return $wgTitle;
 415                 } else {
 416                         return $this->mContextTitle;
 417                 }
 418         }
 419
 420         /**
 421          * Returns if the given content model is editable.
 422          *
 423          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 424          * @return bool
 425          * @throws MWException If $modelId has no known handler
 426          */
 427         public function isSupportedContentModel( $modelId ) {
 428                 return $this->allowNonTextContent ||
 429                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 430         }
 431
 432         function submit() {
 433                 $this->edit();
 434         }
 435
 436         /**
 437          * This is the function that gets called for "action=edit". It
 438          * sets up various member variables, then passes execution to
 439          * another function, usually showEditForm()
 440          *
 441          * The edit form is self-submitting, so that when things like
 442          * preview and edit conflicts occur, we get the same form back
 443          * with the extra stuff added.  Only when the final submission
 444          * is made and all is well do we actually save and redirect to
 445          * the newly-edited page.
 446          */
 447         function edit() {
 448                 global $wgOut, $wgRequest, $wgUser;
 449                 // Allow extensions to modify/prevent this form or submission
 450                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 451                         return;
 452                 }
 453
 454                 wfProfileIn( __METHOD__ );
 455                 wfDebug( __METHOD__ . ": enter\n" );
 456
 457                 // If they used redlink=1 and the page exists, redirect to the main article
 458                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 459                         $wgOut->redirect( $this->mTitle->getFullURL() );
 460                         wfProfileOut( __METHOD__ );
 461                         return;
 462                 }
 463
 464                 $this->importFormData( $wgRequest );
 465                 $this->firsttime = false;
 466
 467                 if ( $this->live ) {
 468                         $this->livePreview();
 469                         wfProfileOut( __METHOD__ );
 470                         return;
 471                 }
 472
 473                 if ( wfReadOnly() && $this->save ) {
 474                         // Force preview
 475                         $this->save = false;
 476                         $this->preview = true;
 477                 }
 478
 479                 if ( $this->save ) {
 480                         $this->formtype = 'save';
 481                 } elseif ( $this->preview ) {
 482                         $this->formtype = 'preview';
 483                 } elseif ( $this->diff ) {
 484                         $this->formtype = 'diff';
 485                 } else { # First time through
 486                         $this->firsttime = true;
 487                         if ( $this->previewOnOpen() ) {
 488                                 $this->formtype = 'preview';
 489                         } else {
 490                                 $this->formtype = 'initial';
 491                         }
 492                 }
 493
 494                 $permErrors = $this->getEditPermissionErrors();
 495                 if ( $permErrors ) {
 496                         wfDebug( __METHOD__ . ": User can't edit\n" );
 497                         // Auto-block user's IP if the account was "hard" blocked
 498                         $wgUser->spreadAnyEditBlock();
 499
 500                         $this->displayPermissionsError( $permErrors );
 501
 502                         wfProfileOut( __METHOD__ );
 503                         return;
 504                 }
 505
 506                 wfProfileIn( __METHOD__ . "-business-end" );
 507
 508                 $this->isConflict = false;
 509                 // css / js subpages of user pages get a special treatment
 510                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 511                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 512                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 513                 // @todo FIXME: Silly assignment.
 514                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 515
 516                 # Show applicable editing introductions
 517                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 518                         $this->showIntro();
 519                 }
 520
 521                 # Attempt submission here.  This will check for edit conflicts,
 522                 # and redundantly check for locked database, blocked IPs, etc.
 523                 # that edit() already checked just in case someone tries to sneak
 524                 # in the back door with a hand-edited submission URL.
 525
 526                 if ( 'save' == $this->formtype ) {
 527                         if ( !$this->attemptSave() ) {
 528                                 wfProfileOut( __METHOD__ . "-business-end" );
 529                                 wfProfileOut( __METHOD__ );
 530                                 return;
 531                         }
 532                 }
 533
 534                 # First time through: get contents, set time for conflict
 535                 # checking, etc.
 536                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 537                         if ( $this->initialiseForm() === false ) {
 538                                 $this->noSuchSectionPage();
 539                                 wfProfileOut( __METHOD__ . "-business-end" );
 540                                 wfProfileOut( __METHOD__ );
 541                                 return;
 542                         }
 543
 544                         if ( !$this->mTitle->getArticleID() ) {
 545                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 546                         } else {
 547                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 548                         }
 549
 550                 }
 551
 552                 $this->showEditForm();
 553                 wfProfileOut( __METHOD__ . "-business-end" );
 554                 wfProfileOut( __METHOD__ );
 555         }
 556
 557         /**
 558          * @return array
 559          */
 560         protected function getEditPermissionErrors() {
 561                 global $wgUser;
 562                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 563                 # Can this title be created?
 564                 if ( !$this->mTitle->exists() ) {
 565                         $permErrors = array_merge( $permErrors,
 566                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 567                 }
 568                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 569                 $remove = array();
 570                 foreach ( $permErrors as $error ) {
 571                         if ( ( $this->preview || $this->diff )
 572                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 573                         ) {
 574                                 $remove[] = $error;
 575                         }
 576                 }
 577                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 578                 return $permErrors;
 579         }
 580
 581         /**
 582          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 583          * but with the following differences:
 584          * - If redlink=1, the user will be redirected to the page
 585          * - If there is content to display or the error occurs while either saving,
 586          *   previewing or showing the difference, it will be a
 587          *   "View source for ..." page displaying the source code after the error message.
 588          *
 589          * @since 1.19
 590          * @param array $permErrors Array of permissions errors, as returned by
 591          *    Title::getUserPermissionsErrors().
 592          * @throws PermissionsError
 593          */
 594         protected function displayPermissionsError( array $permErrors ) {
 595                 global $wgRequest, $wgOut;
 596
 597                 if ( $wgRequest->getBool( 'redlink' ) ) {
 598                         // The edit page was reached via a red link.
 599                         // Redirect to the article page and let them click the edit tab if
 600                         // they really want a permission error.
 601                         $wgOut->redirect( $this->mTitle->getFullURL() );
 602                         return;
 603                 }
 604
 605                 $content = $this->getContentObject();
 606
 607                 # Use the normal message if there's nothing to display
 608                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 609                         $action = $this->mTitle->exists() ? 'edit' :
 610                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 611                         throw new PermissionsError( $action, $permErrors );
 612                 }
 613
 614                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 615
 616                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 617                 $wgOut->setPageTitle( wfMessage(
 618                         'viewsource-title',
 619                         $this->getContextTitle()->getPrefixedText()
 620                 ) );
 621                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 622                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 623                 $wgOut->addHTML( "<hr />\n" );
 624
 625                 # If the user made changes, preserve them when showing the markup
 626                 # (This happens when a user is blocked during edit, for instance)
 627                 if ( !$this->firsttime ) {
 628                         $text = $this->textbox1;
 629                         $wgOut->addWikiMsg( 'viewyourtext' );
 630                 } else {
 631                         $text = $this->toEditText( $content );
 632                         $wgOut->addWikiMsg( 'viewsourcetext' );
 633                 }
 634
 635                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 636
 637                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 638                         Linker::formatTemplates( $this->getTemplates() ) ) );
 639
 640                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 641
 642                 if ( $this->mTitle->exists() ) {
 643                         $wgOut->returnToMain( null, $this->mTitle );
 644                 }
 645         }
 646
 647         /**
 648          * Should we show a preview when the edit form is first shown?
 649          *
 650          * @return bool
 651          */
 652         protected function previewOnOpen() {
 653                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 654                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 655                         // Explicit override from request
 656                         return true;
 657                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 658                         // Explicit override from request
 659                         return false;
 660                 } elseif ( $this->section == 'new' ) {
 661                         // Nothing *to* preview for new sections
 662                         return false;
 663                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 664                         && $wgUser->getOption( 'previewonfirst' )
 665                 ) {
 666                         // Standard preference behavior
 667                         return true;
 668                 } elseif ( !$this->mTitle->exists()
 669                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 670                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 671                 ) {
 672                         // Categories are special
 673                         return true;
 674                 } else {
 675                         return false;
 676                 }
 677         }
 678
 679         /**
 680          * Checks whether the user entered a skin name in uppercase,
 681          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 682          *
 683          * @return bool
 684          */
 685         protected function isWrongCaseCssJsPage() {
 686                 if ( $this->mTitle->isCssJsSubpage() ) {
 687                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 688                         $skins = array_merge(
 689                                 array_keys( Skin::getSkinNames() ),
 690                                 array( 'common' )
 691                         );
 692                         return !in_array( $name, $skins )
 693                                 && in_array( strtolower( $name ), $skins );
 694                 } else {
 695                         return false;
 696                 }
 697         }
 698
 699         /**
 700          * Returns whether section editing is supported for the current page.
 701          * Subclasses may override this to replace the default behavior, which is
 702          * to check ContentHandler::supportsSections.
 703          *
 704          * @return bool True if this edit page supports sections, false otherwise.
 705          */
 706         protected function isSectionEditSupported() {
 707                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 708                 return $contentHandler->supportsSections();
 709         }
 710
 711         /**
 712          * This function collects the form data and uses it to populate various member variables.
 713          * @param WebRequest $request
 714          * @throws ErrorPageError
 715          */
 716         function importFormData( &$request ) {
 717                 global $wgContLang, $wgUser;
 718
 719                 wfProfileIn( __METHOD__ );
 720
 721                 # Section edit can come from either the form or a link
 722                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 723
 724                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 725                         wfProfileOut( __METHOD__ );
 726                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 727                 }
 728
 729                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 730
 731                 if ( $request->wasPosted() ) {
 732                         # These fields need to be checked for encoding.
 733                         # Also remove trailing whitespace, but don't remove _initial_
 734                         # whitespace from the text boxes. This may be significant formatting.
 735                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 736                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 737                                 // Skip this if wpTextbox2 has input, it indicates that we came
 738                                 // from a conflict page with raw page text, not a custom form
 739                                 // modified by subclasses
 740                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 741                                 $textbox1 = $this->importContentFormData( $request );
 742                                 if ( $textbox1 !== null ) {
 743                                         $this->textbox1 = $textbox1;
 744                                 }
 745
 746                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 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' ) && is_null( $this->edittime ) );
 788                         }
 789                         if ( $this->incompleteForm ) {
 790                                 # If the form is incomplete, force to preview.
 791                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 792                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 793                                 $this->preview = true;
 794                         } else {
 795                                 /* Fallback for live preview */
 796                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 797                                 $this->diff = $request->getCheck( 'wpDiff' );
 798
 799                                 // Remember whether a save was requested, so we can indicate
 800                                 // if we forced preview due to session failure.
 801                                 $this->mTriedSave = !$this->preview;
 802
 803                                 if ( $this->tokenOk( $request ) ) {
 804                                         # Some browsers will not report any submit button
 805                                         # if the user hits enter in the comment box.
 806                                         # The unmarked state will be assumed to be a save,
 807                                         # if the form seems otherwise complete.
 808                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 809                                 } elseif ( $this->diff ) {
 810                                         # Failed token check, but only requested "Show Changes".
 811                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 812                                 } else {
 813                                         # Page might be a hack attempt posted from
 814                                         # an external site. Preview instead of saving.
 815                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 816                                         $this->preview = true;
 817                                 }
 818                         }
 819                         $this->save = !$this->preview && !$this->diff;
 820                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 821                                 $this->edittime = null;
 822                         }
 823
 824                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 825                                 $this->starttime = null;
 826                         }
 827
 828                         $this->recreate = $request->getCheck( 'wpRecreate' );
 829
 830                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 831                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 832
 833                         # Don't force edit summaries when a user is editing their own user or talk page
 834                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 835                                 && $this->mTitle->getText() == $wgUser->getName()
 836                         ) {
 837                                 $this->allowBlankSummary = true;
 838                         } else {
 839                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 840                                         || !$wgUser->getOption( 'forceeditsummary' );
 841                         }
 842
 843                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 844
 845                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 846                 } else {
 847                         # Not a posted form? Start with nothing.
 848                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 849                         $this->textbox1 = '';
 850                         $this->summary = '';
 851                         $this->sectiontitle = '';
 852                         $this->edittime = '';
 853                         $this->starttime = wfTimestampNow();
 854                         $this->edit = false;
 855                         $this->preview = false;
 856                         $this->save = false;
 857                         $this->diff = false;
 858                         $this->minoredit = false;
 859                         // Watch may be overridden by request parameters
 860                         $this->watchthis = $request->getBool( 'watchthis', false );
 861                         $this->recreate = false;
 862
 863                         // When creating a new section, we can preload a section title by passing it as the
 864                         // preloadtitle parameter in the URL (Bug 13100)
 865                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 866                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 867                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 868                                 $this->summary = $request->getVal( 'preloadtitle' );
 869                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 870                                 $this->summary = $request->getText( 'summary' );
 871                                 if ( $this->summary !== '' ) {
 872                                         $this->hasPresetSummary = true;
 873                                 }
 874                         }
 875
 876                         if ( $request->getVal( 'minor' ) ) {
 877                                 $this->minoredit = true;
 878                         }
 879                 }
 880
 881                 $this->oldid = $request->getInt( 'oldid' );
 882
 883                 $this->bot = $request->getBool( 'bot', true );
 884                 $this->nosummary = $request->getBool( 'nosummary' );
 885
 886                 // May be overridden by revision.
 887                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 888                 // May be overridden by revision.
 889                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 890
 891                 if ( !ContentHandler::getForModelID( $this->contentModel )
 892                         ->isSupportedFormat( $this->contentFormat )
 893                 ) {
 894                         throw new ErrorPageError(
 895                                 'editpage-notsupportedcontentformat-title',
 896                                 'editpage-notsupportedcontentformat-text',
 897                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 898                         );
 899                 }
 900
 901                 /**
 902                  * @todo Check if the desired model is allowed in this namespace, and if
 903                  *   a transition from the page's current model to the new model is
 904                  *   allowed.
 905                  */
 906
 907                 $this->live = $request->getCheck( 'live' );
 908                 $this->editintro = $request->getText( 'editintro',
 909                         // Custom edit intro for new sections
 910                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 911
 912                 // Allow extensions to modify form data
 913                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 914
 915                 wfProfileOut( __METHOD__ );
 916         }
 917
 918         /**
 919          * Subpage overridable method for extracting the page content data from the
 920          * posted form to be placed in $this->textbox1, if using customized input
 921          * this method should be overridden and return the page text that will be used
 922          * for saving, preview parsing and so on...
 923          *
 924          * @param WebRequest $request
 925          */
 926         protected function importContentFormData( &$request ) {
 927                 return; // Don't do anything, EditPage already extracted wpTextbox1
 928         }
 929
 930         /**
 931          * Initialise form fields in the object
 932          * Called on the first invocation, e.g. when a user clicks an edit link
 933          * @return bool If the requested section is valid
 934          */
 935         function initialiseForm() {
 936                 global $wgUser;
 937                 $this->edittime = $this->mArticle->getTimestamp();
 938
 939                 $content = $this->getContentObject( false ); #TODO: track content object?!
 940                 if ( $content === false ) {
 941                         return false;
 942                 }
 943                 $this->textbox1 = $this->toEditText( $content );
 944
 945                 // activate checkboxes if user wants them to be always active
 946                 # Sort out the "watch" checkbox
 947                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 948                         # Watch all edits
 949                         $this->watchthis = true;
 950                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 951                         # Watch creations
 952                         $this->watchthis = true;
 953                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 954                         # Already watched
 955                         $this->watchthis = true;
 956                 }
 957                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 958                         $this->minoredit = true;
 959                 }
 960                 if ( $this->textbox1 === false ) {
 961                         return false;
 962                 }
 963                 return true;
 964         }
 965
 966         /**
 967          * @param Content|null $def_content The default value to return
 968          *
 969          * @return Content|null Content on success, $def_content for invalid sections
 970          *
 971          * @since 1.21
 972          */
 973         protected function getContentObject( $def_content = null ) {
 974                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 975
 976                 wfProfileIn( __METHOD__ );
 977
 978                 $content = false;
 979
 980                 // For message page not locally set, use the i18n message.
 981                 // For other non-existent articles, use preload text if any.
 982                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 983                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 984                                 # If this is a system message, get the default text.
 985                                 $msg = $this->mTitle->getDefaultMessageText();
 986
 987                                 $content = $this->toEditContent( $msg );
 988                         }
 989                         if ( $content === false ) {
 990                                 # If requested, preload some text.
 991                                 $preload = $wgRequest->getVal( 'preload',
 992                                         // Custom preload text for new sections
 993                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 994                                 $params = $wgRequest->getArray( 'preloadparams', array() );
 995
 996                                 $content = $this->getPreloadedContent( $preload, $params );
 997                         }
 998                 // For existing pages, get text based on "undo" or section parameters.
 999                 } else {
1000                         if ( $this->section != '' ) {
1001                                 // Get section edit text (returns $def_text for invalid sections)
1002                                 $orig = $this->getOriginalContent( $wgUser );
1003                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1004
1005                                 if ( !$content ) {
1006                                         $content = $def_content;
1007                                 }
1008                         } else {
1009                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1010                                 $undo = $wgRequest->getInt( 'undo' );
1011
1012                                 if ( $undo > 0 && $undoafter > 0 ) {
1013
1014                                         $undorev = Revision::newFromId( $undo );
1015                                         $oldrev = Revision::newFromId( $undoafter );
1016
1017                                         # Sanity check, make sure it's the right page,
1018                                         # the revisions exist and they were not deleted.
1019                                         # Otherwise, $content will be left as-is.
1020                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1021                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1022                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1023
1024                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1025
1026                                                 if ( $content === false ) {
1027                                                         # Warn the user that something went wrong
1028                                                         $undoMsg = 'failure';
1029                                                 } else {
1030                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1031                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1032                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1033
1034                                                         if ( $newContent->equals( $oldContent ) ) {
1035                                                                 # Tell the user that the undo results in no change,
1036                                                                 # i.e. the revisions were already undone.
1037                                                                 $undoMsg = 'nochange';
1038                                                                 $content = false;
1039                                                         } else {
1040                                                                 # Inform the user of our success and set an automatic edit summary
1041                                                                 $undoMsg = 'success';
1042
1043                                                                 # If we just undid one rev, use an autosummary
1044                                                                 $firstrev = $oldrev->getNext();
1045                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1046                                                                         $userText = $undorev->getUserText();
1047                                                                         if ( $userText === '' ) {
1048                                                                                 $undoSummary = wfMessage(
1049                                                                                         'undo-summary-username-hidden',
1050                                                                                         $undo
1051                                                                                 )->inContentLanguage()->text();
1052                                                                         } else {
1053                                                                                 $undoSummary = wfMessage(
1054                                                                                         'undo-summary',
1055                                                                                         $undo,
1056                                                                                         $userText
1057                                                                                 )->inContentLanguage()->text();
1058                                                                         }
1059                                                                         if ( $this->summary === '' ) {
1060                                                                                 $this->summary = $undoSummary;
1061                                                                         } else {
1062                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1063                                                                                         ->inContentLanguage()->text() . $this->summary;
1064                                                                         }
1065                                                                         $this->undidRev = $undo;
1066                                                                 }
1067                                                                 $this->formtype = 'diff';
1068                                                         }
1069                                                 }
1070                                         } else {
1071                                                 // Failed basic sanity checks.
1072                                                 // Older revisions may have been removed since the link
1073                                                 // was created, or we may simply have got bogus input.
1074                                                 $undoMsg = 'norev';
1075                                         }
1076
1077                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1078                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1079                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1080                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1081                                 }
1082
1083                                 if ( $content === false ) {
1084                                         $content = $this->getOriginalContent( $wgUser );
1085                                 }
1086                         }
1087                 }
1088
1089                 wfProfileOut( __METHOD__ );
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                                 return true;
1332
1333                         case self::AS_HOOK_ERROR:
1334                                 return false;
1335
1336                         case self::AS_PARSE_ERROR:
1337                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1338                                 return true;
1339
1340                         case self::AS_SUCCESS_NEW_ARTICLE:
1341                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1342                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1343                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1344                                 return false;
1345
1346                         case self::AS_SUCCESS_UPDATE:
1347                                 $extraQuery = '';
1348                                 $sectionanchor = $resultDetails['sectionanchor'];
1349
1350                                 // Give extensions a chance to modify URL query on update
1351                                 wfRunHooks(
1352                                         'ArticleUpdateBeforeRedirect',
1353                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1354                                 );
1355
1356                                 if ( $resultDetails['redirect'] ) {
1357                                         if ( $extraQuery == '' ) {
1358                                                 $extraQuery = 'redirect=no';
1359                                         } else {
1360                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1361                                         }
1362                                 }
1363                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1364                                 return false;
1365
1366                         case self::AS_SPAM_ERROR:
1367                                 $this->spamPageWithContent( $resultDetails['spam'] );
1368                                 return false;
1369
1370                         case self::AS_BLOCKED_PAGE_FOR_USER:
1371                                 throw new UserBlockedError( $wgUser->getBlock() );
1372
1373                         case self::AS_IMAGE_REDIRECT_ANON:
1374                         case self::AS_IMAGE_REDIRECT_LOGGED:
1375                                 throw new PermissionsError( 'upload' );
1376
1377                         case self::AS_READ_ONLY_PAGE_ANON:
1378                         case self::AS_READ_ONLY_PAGE_LOGGED:
1379                                 throw new PermissionsError( 'edit' );
1380
1381                         case self::AS_READ_ONLY_PAGE:
1382                                 throw new ReadOnlyError;
1383
1384                         case self::AS_RATE_LIMITED:
1385                                 throw new ThrottledError();
1386
1387                         case self::AS_NO_CREATE_PERMISSION:
1388                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1389                                 throw new PermissionsError( $permission );
1390
1391                         default:
1392                                 // We don't recognize $status->value. The only way that can happen
1393                                 // is if an extension hook aborted from inside ArticleSave.
1394                                 // Render the status object into $this->hookError
1395                                 // FIXME this sucks, we should just use the Status object throughout
1396                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1397                                         '</div>';
1398                                 return true;
1399                 }
1400         }
1401
1402         /**
1403          * Run hooks that can filter edits just before they get saved.
1404          *
1405          * @param Content $content The Content to filter.
1406          * @param Status $status For reporting the outcome to the caller
1407          * @param User $user The user performing the edit
1408          *
1409          * @return bool
1410          */
1411         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1412                 // Run old style post-section-merge edit filter
1413                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1414                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1415
1416                         # Error messages etc. could be handled within the hook...
1417                         $status->fatal( 'hookaborted' );
1418                         $status->value = self::AS_HOOK_ERROR;
1419                         return false;
1420                 } elseif ( $this->hookError != '' ) {
1421                         # ...or the hook could be expecting us to produce an error
1422                         $status->fatal( 'hookaborted' );
1423                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1424                         return false;
1425                 }
1426
1427                 // Run new style post-section-merge edit filter
1428                 if ( !wfRunHooks( 'EditFilterMergedContent',
1429                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1430                                 $user, $this->minoredit ) ) ) {
1431
1432                         # Error messages etc. could be handled within the hook...
1433                         // XXX: $status->value may already be something informative...
1434                         $this->hookError = $status->getWikiText();
1435                         $status->fatal( 'hookaborted' );
1436                         $status->value = self::AS_HOOK_ERROR;
1437                         return false;
1438                 } elseif ( !$status->isOK() ) {
1439                         # ...or the hook could be expecting us to produce an error
1440                         // FIXME this sucks, we should just use the Status object throughout
1441                         $this->hookError = $status->getWikiText();
1442                         $status->fatal( 'hookaborted' );
1443                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1444                         return false;
1445                 }
1446
1447                 return true;
1448         }
1449
1450         /**
1451          * Return the summary to be used for a new section.
1452          *
1453          * @param string $sectionanchor Set to the section anchor text
1454          * @return string
1455          */
1456         private function newSectionSummary( &$sectionanchor = null ) {
1457                 global $wgParser;
1458
1459                 if ( $this->sectiontitle !== '' ) {
1460                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1461                         // If no edit summary was specified, create one automatically from the section
1462                         // title and have it link to the new section. Otherwise, respect the summary as
1463                         // passed.
1464                         if ( $this->summary === '' ) {
1465                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1466                                 return wfMessage( 'newsectionsummary' )
1467                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1468                         }
1469                 } elseif ( $this->summary !== '' ) {
1470                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1471                         # This is a new section, so create a link to the new section
1472                         # in the revision summary.
1473                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1474                         return wfMessage( 'newsectionsummary' )
1475                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1476                 }
1477                 return $this->summary;
1478         }
1479
1480         /**
1481          * Attempt submission (no UI)
1482          *
1483          * @param array $result Array to add statuses to, currently with the
1484          *   possible keys:
1485          *   - spam (string): Spam string from content if any spam is detected by
1486          *     matchSpamRegex.
1487          *   - sectionanchor (string): Section anchor for a section save.
1488          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1489          *     false otherwise.
1490          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1491          *     revision is a redirect.
1492          * @param bool $bot True if edit is being made under the bot right.
1493          *
1494          * @return Status Status object, possibly with a message, but always with
1495          *   one of the AS_* constants in $status->value,
1496          *
1497          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1498          *   various error display idiosyncrasies. There are also lots of cases
1499          *   where error metadata is set in the object and retrieved later instead
1500          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1501          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1502          * time.
1503          */
1504         function internalAttemptSave( &$result, $bot = false ) {
1505                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1506
1507                 $status = Status::newGood();
1508
1509                 wfProfileIn( __METHOD__ );
1510                 wfProfileIn( __METHOD__ . '-checks' );
1511
1512                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1513                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1514                         $status->fatal( 'hookaborted' );
1515                         $status->value = self::AS_HOOK_ERROR;
1516                         wfProfileOut( __METHOD__ . '-checks' );
1517                         wfProfileOut( __METHOD__ );
1518                         return $status;
1519                 }
1520
1521                 $spam = $wgRequest->getText( 'wpAntispam' );
1522                 if ( $spam !== '' ) {
1523                         wfDebugLog(
1524                                 'SimpleAntiSpam',
1525                                 $wgUser->getName() .
1526                                 ' editing "' .
1527                                 $this->mTitle->getPrefixedText() .
1528                                 '" submitted bogus field "' .
1529                                 $spam .
1530                                 '"'
1531                         );
1532                         $status->fatal( 'spamprotectionmatch', false );
1533                         $status->value = self::AS_SPAM_ERROR;
1534                         wfProfileOut( __METHOD__ . '-checks' );
1535                         wfProfileOut( __METHOD__ );
1536                         return $status;
1537                 }
1538
1539                 try {
1540                         # Construct Content object
1541                         $textbox_content = $this->toEditContent( $this->textbox1 );
1542                 } catch ( MWContentSerializationException $ex ) {
1543                         $status->fatal(
1544                                 'content-failed-to-parse',
1545                                 $this->contentModel,
1546                                 $this->contentFormat,
1547                                 $ex->getMessage()
1548                         );
1549                         $status->value = self::AS_PARSE_ERROR;
1550                         wfProfileOut( __METHOD__ . '-checks' );
1551                         wfProfileOut( __METHOD__ );
1552                         return $status;
1553                 }
1554
1555                 # Check image redirect
1556                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1557                         $textbox_content->isRedirect() &&
1558                         !$wgUser->isAllowed( 'upload' )
1559                 ) {
1560                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1561                                 $status->setResult( false, $code );
1562
1563                                 wfProfileOut( __METHOD__ . '-checks' );
1564                                 wfProfileOut( __METHOD__ );
1565
1566                                 return $status;
1567                 }
1568
1569                 # Check for spam
1570                 $match = self::matchSummarySpamRegex( $this->summary );
1571                 if ( $match === false && $this->section == 'new' ) {
1572                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1573                         # regular summaries, it is added to the actual wikitext.
1574                         if ( $this->sectiontitle !== '' ) {
1575                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1576                                 $match = self::matchSpamRegex( $this->sectiontitle );
1577                         } else {
1578                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1579                                 # is used with the 'summary' parameter.
1580                                 $match = self::matchSpamRegex( $this->summary );
1581                         }
1582                 }
1583                 if ( $match === false ) {
1584                         $match = self::matchSpamRegex( $this->textbox1 );
1585                 }
1586                 if ( $match !== false ) {
1587                         $result['spam'] = $match;
1588                         $ip = $wgRequest->getIP();
1589                         $pdbk = $this->mTitle->getPrefixedDBkey();
1590                         $match = str_replace( "\n", '', $match );
1591                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1592                         $status->fatal( 'spamprotectionmatch', $match );
1593                         $status->value = self::AS_SPAM_ERROR;
1594                         wfProfileOut( __METHOD__ . '-checks' );
1595                         wfProfileOut( __METHOD__ );
1596                         return $status;
1597                 }
1598                 if ( !wfRunHooks(
1599                         'EditFilter',
1600                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1601                 ) {
1602                         # Error messages etc. could be handled within the hook...
1603                         $status->fatal( 'hookaborted' );
1604                         $status->value = self::AS_HOOK_ERROR;
1605                         wfProfileOut( __METHOD__ . '-checks' );
1606                         wfProfileOut( __METHOD__ );
1607                         return $status;
1608                 } elseif ( $this->hookError != '' ) {
1609                         # ...or the hook could be expecting us to produce an error
1610                         $status->fatal( 'hookaborted' );
1611                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1612                         wfProfileOut( __METHOD__ . '-checks' );
1613                         wfProfileOut( __METHOD__ );
1614                         return $status;
1615                 }
1616
1617                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1618                         // Auto-block user's IP if the account was "hard" blocked
1619                         $wgUser->spreadAnyEditBlock();
1620                         # Check block state against master, thus 'false'.
1621                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1622                         wfProfileOut( __METHOD__ . '-checks' );
1623                         wfProfileOut( __METHOD__ );
1624                         return $status;
1625                 }
1626
1627                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1628                 if ( $this->kblength > $wgMaxArticleSize ) {
1629                         // Error will be displayed by showEditForm()
1630                         $this->tooBig = true;
1631                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1632                         wfProfileOut( __METHOD__ . '-checks' );
1633                         wfProfileOut( __METHOD__ );
1634                         return $status;
1635                 }
1636
1637                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1638                         if ( $wgUser->isAnon() ) {
1639                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1640                                 wfProfileOut( __METHOD__ . '-checks' );
1641                                 wfProfileOut( __METHOD__ );
1642                                 return $status;
1643                         } else {
1644                                 $status->fatal( 'readonlytext' );
1645                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1646                                 wfProfileOut( __METHOD__ . '-checks' );
1647                                 wfProfileOut( __METHOD__ );
1648                                 return $status;
1649                         }
1650                 }
1651
1652                 if ( wfReadOnly() ) {
1653                         $status->fatal( 'readonlytext' );
1654                         $status->value = self::AS_READ_ONLY_PAGE;
1655                         wfProfileOut( __METHOD__ . '-checks' );
1656                         wfProfileOut( __METHOD__ );
1657                         return $status;
1658                 }
1659                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1660                         $status->fatal( 'actionthrottledtext' );
1661                         $status->value = self::AS_RATE_LIMITED;
1662                         wfProfileOut( __METHOD__ . '-checks' );
1663                         wfProfileOut( __METHOD__ );
1664                         return $status;
1665                 }
1666
1667                 # If the article has been deleted while editing, don't save it without
1668                 # confirmation
1669                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1670                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1671                         wfProfileOut( __METHOD__ . '-checks' );
1672                         wfProfileOut( __METHOD__ );
1673                         return $status;
1674                 }
1675
1676                 wfProfileOut( __METHOD__ . '-checks' );
1677
1678                 # Load the page data from the master. If anything changes in the meantime,
1679                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1680                 $this->mArticle->loadPageData( 'fromdbmaster' );
1681                 $new = !$this->mArticle->exists();
1682
1683                 if ( $new ) {
1684                         // Late check for create permission, just in case *PARANOIA*
1685                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1686                                 $status->fatal( 'nocreatetext' );
1687                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1688                                 wfDebug( __METHOD__ . ": no create permission\n" );
1689                                 wfProfileOut( __METHOD__ );
1690                                 return $status;
1691                         }
1692
1693                         // Don't save a new page if it's blank or if it's a MediaWiki:
1694                         // message with content equivalent to default (allow empty pages
1695                         // in this case to disable messages, see bug 50124)
1696                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1697                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1698                                 $defaultText = $defaultMessageText;
1699                         } else {
1700                                 $defaultText = '';
1701                         }
1702
1703                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1704                                 $this->blankArticle = true;
1705                                 $status->fatal( 'blankarticle' );
1706                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1707                                 wfProfileOut( __METHOD__ );
1708                                 return $status;
1709                         }
1710
1711                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1712                                 wfProfileOut( __METHOD__ );
1713                                 return $status;
1714                         }
1715
1716                         $content = $textbox_content;
1717
1718                         $result['sectionanchor'] = '';
1719                         if ( $this->section == 'new' ) {
1720                                 if ( $this->sectiontitle !== '' ) {
1721                                         // Insert the section title above the content.
1722                                         $content = $content->addSectionHeader( $this->sectiontitle );
1723                                 } elseif ( $this->summary !== '' ) {
1724                                         // Insert the section title above the content.
1725                                         $content = $content->addSectionHeader( $this->summary );
1726                                 }
1727                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1728                         }
1729
1730                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1731
1732                 } else { # not $new
1733
1734                         # Article exists. Check for edit conflict.
1735
1736                         $this->mArticle->clear(); # Force reload of dates, etc.
1737                         $timestamp = $this->mArticle->getTimestamp();
1738
1739                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1740
1741                         if ( $timestamp != $this->edittime ) {
1742                                 $this->isConflict = true;
1743                                 if ( $this->section == 'new' ) {
1744                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1745                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1746                                         ) {
1747                                                 // Probably a duplicate submission of a new comment.
1748                                                 // This can happen when squid resends a request after
1749                                                 // a timeout but the first one actually went through.
1750                                                 wfDebug( __METHOD__
1751                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1752                                         } else {
1753                                                 // New comment; suppress conflict.
1754                                                 $this->isConflict = false;
1755                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1756                                         }
1757                                 } elseif ( $this->section == ''
1758                                         && Revision::userWasLastToEdit(
1759                                                 DB_MASTER, $this->mTitle->getArticleID(),
1760                                                 $wgUser->getId(), $this->edittime
1761                                         )
1762                                 ) {
1763                                         # Suppress edit conflict with self, except for section edits where merging is required.
1764                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1765                                         $this->isConflict = false;
1766                                 }
1767                         }
1768
1769                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1770                         if ( $this->sectiontitle !== '' ) {
1771                                 $sectionTitle = $this->sectiontitle;
1772                         } else {
1773                                 $sectionTitle = $this->summary;
1774                         }
1775
1776                         $content = null;
1777
1778                         if ( $this->isConflict ) {
1779                                 wfDebug( __METHOD__
1780                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1781                                         . " (article time '{$timestamp}')\n" );
1782
1783                                 $content = $this->mArticle->replaceSectionContent(
1784                                         $this->section,
1785                                         $textbox_content,
1786                                         $sectionTitle,
1787                                         $this->edittime
1788                                 );
1789                         } else {
1790                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1791                                 $content = $this->mArticle->replaceSectionContent(
1792                                         $this->section,
1793                                         $textbox_content,
1794                                         $sectionTitle
1795                                 );
1796                         }
1797
1798                         if ( is_null( $content ) ) {
1799                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1800                                 $this->isConflict = true;
1801                                 $content = $textbox_content; // do not try to merge here!
1802                         } elseif ( $this->isConflict ) {
1803                                 # Attempt merge
1804                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1805                                         // Successful merge! Maybe we should tell the user the good news?
1806                                         $this->isConflict = false;
1807                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1808                                 } else {
1809                                         $this->section = '';
1810                                         $this->textbox1 = ContentHandler::getContentText( $content );
1811                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1812                                 }
1813                         }
1814
1815                         if ( $this->isConflict ) {
1816                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1817                                 wfProfileOut( __METHOD__ );
1818                                 return $status;
1819                         }
1820
1821                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1822                                 wfProfileOut( __METHOD__ );
1823                                 return $status;
1824                         }
1825
1826                         if ( $this->section == 'new' ) {
1827                                 // Handle the user preference to force summaries here
1828                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1829                                         $this->missingSummary = true;
1830                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1831                                         $status->value = self::AS_SUMMARY_NEEDED;
1832                                         wfProfileOut( __METHOD__ );
1833                                         return $status;
1834                                 }
1835
1836                                 // Do not allow the user to post an empty comment
1837                                 if ( $this->textbox1 == '' ) {
1838                                         $this->missingComment = true;
1839                                         $status->fatal( 'missingcommenttext' );
1840                                         $status->value = self::AS_TEXTBOX_EMPTY;
1841                                         wfProfileOut( __METHOD__ );
1842                                         return $status;
1843                                 }
1844                         } elseif ( !$this->allowBlankSummary
1845                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1846                                 && !$content->isRedirect()
1847                                 && md5( $this->summary ) == $this->autoSumm
1848                         ) {
1849                                 $this->missingSummary = true;
1850                                 $status->fatal( 'missingsummary' );
1851                                 $status->value = self::AS_SUMMARY_NEEDED;
1852                                 wfProfileOut( __METHOD__ );
1853                                 return $status;
1854                         }
1855
1856                         # All's well
1857                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1858                         $sectionanchor = '';
1859                         if ( $this->section == 'new' ) {
1860                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1861                         } elseif ( $this->section != '' ) {
1862                                 # Try to get a section anchor from the section source, redirect
1863                                 # to edited section if header found.
1864                                 # XXX: Might be better to integrate this into Article::replaceSection
1865                                 # for duplicate heading checking and maybe parsing.
1866                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1867                                 # We can't deal with anchors, includes, html etc in the header for now,
1868                                 # headline would need to be parsed to improve this.
1869                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1870                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1871                                 }
1872                         }
1873                         $result['sectionanchor'] = $sectionanchor;
1874                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1875
1876                         // Save errors may fall down to the edit form, but we've now
1877                         // merged the section into full text. Clear the section field
1878                         // so that later submission of conflict forms won't try to
1879                         // replace that into a duplicated mess.
1880                         $this->textbox1 = $this->toEditText( $content );
1881                         $this->section = '';
1882
1883                         $status->value = self::AS_SUCCESS_UPDATE;
1884                 }
1885
1886                 // Check for length errors again now that the section is merged in
1887                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1888                 if ( $this->kblength > $wgMaxArticleSize ) {
1889                         $this->tooBig = true;
1890                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1891                         wfProfileOut( __METHOD__ );
1892                         return $status;
1893                 }
1894
1895                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1896                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1897                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1898                         ( $bot ? EDIT_FORCE_BOT : 0 );
1899
1900                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1901                                                                                                                 false, null, $this->contentFormat );
1902
1903                 if ( !$doEditStatus->isOK() ) {
1904                         // Failure from doEdit()
1905                         // Show the edit conflict page for certain recognized errors from doEdit(),
1906                         // but don't show it for errors from extension hooks
1907                         $errors = $doEditStatus->getErrorsArray();
1908                         if ( in_array( $errors[0][0],
1909                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1910                         ) {
1911                                 $this->isConflict = true;
1912                                 // Destroys data doEdit() put in $status->value but who cares
1913                                 $doEditStatus->value = self::AS_END;
1914                         }
1915                         wfProfileOut( __METHOD__ );
1916                         return $doEditStatus;
1917                 }
1918
1919                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1920                 if ( $result['nullEdit'] ) {
1921                         // We don't know if it was a null edit until now, so increment here
1922                         $wgUser->pingLimiter( 'linkpurge' );
1923                 }
1924                 $result['redirect'] = $content->isRedirect();
1925                 $this->updateWatchlist();
1926                 wfProfileOut( __METHOD__ );
1927                 return $status;
1928         }
1929
1930         /**
1931          * Register the change of watch status
1932          */
1933         protected function updateWatchlist() {
1934                 global $wgUser;
1935
1936                 if ( $wgUser->isLoggedIn()
1937                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1938                 ) {
1939                         $fname = __METHOD__;
1940                         $title = $this->mTitle;
1941                         $watch = $this->watchthis;
1942
1943                         // Do this in its own transaction to reduce contention...
1944                         $dbw = wfGetDB( DB_MASTER );
1945                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1946                                 $dbw->begin( $fname );
1947                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1948                                 $dbw->commit( $fname );
1949                         } );
1950                 }
1951         }
1952
1953         /**
1954          * Attempts to do 3-way merge of edit content with a base revision
1955          * and current content, in case of edit conflict, in whichever way appropriate
1956          * for the content type.
1957          *
1958          * @since 1.21
1959          *
1960          * @param Content $editContent
1961          *
1962          * @return bool
1963          */
1964         private function mergeChangesIntoContent( &$editContent ) {
1965                 wfProfileIn( __METHOD__ );
1966
1967                 $db = wfGetDB( DB_MASTER );
1968
1969                 // This is the revision the editor started from
1970                 $baseRevision = $this->getBaseRevision();
1971                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1972
1973                 if ( is_null( $baseContent ) ) {
1974                         wfProfileOut( __METHOD__ );
1975                         return false;
1976                 }
1977
1978                 // The current state, we want to merge updates into it
1979                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1980                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1981
1982                 if ( is_null( $currentContent ) ) {
1983                         wfProfileOut( __METHOD__ );
1984                         return false;
1985                 }
1986
1987                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1988
1989                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1990
1991                 if ( $result ) {
1992                         $editContent = $result;
1993                         wfProfileOut( __METHOD__ );
1994                         return true;
1995                 }
1996
1997                 wfProfileOut( __METHOD__ );
1998                 return false;
1999         }
2000
2001         /**
2002          * @return Revision
2003          */
2004         function getBaseRevision() {
2005                 if ( !$this->mBaseRevision ) {
2006                         $db = wfGetDB( DB_MASTER );
2007                         $this->mBaseRevision = Revision::loadFromTimestamp(
2008                                 $db, $this->mTitle, $this->edittime );
2009                 }
2010                 return $this->mBaseRevision;
2011         }
2012
2013         /**
2014          * Check given input text against $wgSpamRegex, and return the text of the first match.
2015          *
2016          * @param string $text
2017          *
2018          * @return string|bool Matching string or false
2019          */
2020         public static function matchSpamRegex( $text ) {
2021                 global $wgSpamRegex;
2022                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2023                 $regexes = (array)$wgSpamRegex;
2024                 return self::matchSpamRegexInternal( $text, $regexes );
2025         }
2026
2027         /**
2028          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2029          *
2030          * @param string $text
2031          *
2032          * @return string|bool Matching string or false
2033          */
2034         public static function matchSummarySpamRegex( $text ) {
2035                 global $wgSummarySpamRegex;
2036                 $regexes = (array)$wgSummarySpamRegex;
2037                 return self::matchSpamRegexInternal( $text, $regexes );
2038         }
2039
2040         /**
2041          * @param string $text
2042          * @param array $regexes
2043          * @return bool|string
2044          */
2045         protected static function matchSpamRegexInternal( $text, $regexes ) {
2046                 foreach ( $regexes as $regex ) {
2047                         $matches = array();
2048                         if ( preg_match( $regex, $text, $matches ) ) {
2049                                 return $matches[0];
2050                         }
2051                 }
2052                 return false;
2053         }
2054
2055         function setHeaders() {
2056                 global $wgOut, $wgUser;
2057
2058                 $wgOut->addModules( 'mediawiki.action.edit' );
2059                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2060
2061                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2062                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2063                 }
2064
2065                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2066                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2067                 }
2068
2069                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2070
2071                 # Enabled article-related sidebar, toplinks, etc.
2072                 $wgOut->setArticleRelated( true );
2073
2074                 $contextTitle = $this->getContextTitle();
2075                 if ( $this->isConflict ) {
2076                         $msg = 'editconflict';
2077                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2078                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2079                 } else {
2080                         $msg = $contextTitle->exists()
2081                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2082                                         && $contextTitle->getDefaultMessageText() !== false
2083                                 )
2084                                 ? 'editing'
2085                                 : 'creating';
2086                 }
2087
2088                 # Use the title defined by DISPLAYTITLE magic word when present
2089                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2090                 if ( $displayTitle === false ) {
2091                         $displayTitle = $contextTitle->getPrefixedText();
2092                 }
2093                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2094         }
2095
2096         /**
2097          * Show all applicable editing introductions
2098          */
2099         protected function showIntro() {
2100                 global $wgOut, $wgUser;
2101                 if ( $this->suppressIntro ) {
2102                         return;
2103                 }
2104
2105                 $namespace = $this->mTitle->getNamespace();
2106
2107                 if ( $namespace == NS_MEDIAWIKI ) {
2108                         # Show a warning if editing an interface message
2109                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2110                 } elseif ( $namespace == NS_FILE ) {
2111                         # Show a hint to shared repo
2112                         $file = wfFindFile( $this->mTitle );
2113                         if ( $file && !$file->isLocal() ) {
2114                                 $descUrl = $file->getDescriptionUrl();
2115                                 # there must be a description url to show a hint to shared repo
2116                                 if ( $descUrl ) {
2117                                         if ( !$this->mTitle->exists() ) {
2118                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2119                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2120                                                 ) );
2121                                         } else {
2122                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2123                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2124                                                 ) );
2125                                         }
2126                                 }
2127                         }
2128                 }
2129
2130                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2131                 # Show log extract when the user is currently blocked
2132                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2133                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2134                         $username = $parts[0];
2135                         $user = User::newFromName( $username, false /* allow IP users*/ );
2136                         $ip = User::isIP( $username );
2137                         $block = Block::newFromTarget( $user, $user );
2138                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2139                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2140                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2141                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) { # Show log extract if the user is currently blocked
2142                                 LogEventsList::showLogExtract(
2143                                         $wgOut,
2144                                         'block',
2145                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2146                                         '',
2147                                         array(
2148                                                 'lim' => 1,
2149                                                 'showIfEmpty' => false,
2150                                                 'msgKey' => array(
2151                                                         'blocked-notice-logextract',
2152                                                         $user->getName() # Support GENDER in notice
2153                                                 )
2154                                         )
2155                                 );
2156                         }
2157                 }
2158                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2159                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2160                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2161                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2162                         ) );
2163                         if ( $wgUser->isLoggedIn() ) {
2164                                 $wgOut->wrapWikiMsg(
2165                                         // Suppress the external link icon, consider the help url an internal one
2166                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2167                                         array(
2168                                                 'newarticletext',
2169                                                 $helpLink
2170                                         )
2171                                 );
2172                         } else {
2173                                 $wgOut->wrapWikiMsg(
2174                                         // Suppress the external link icon, consider the help url an internal one
2175                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2176                                         array(
2177                                                 'newarticletextanon',
2178                                                 $helpLink
2179                                         )
2180                                 );
2181                         }
2182                 }
2183                 # Give a notice if the user is editing a deleted/moved page...
2184                 if ( !$this->mTitle->exists() ) {
2185                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2186                                 '',
2187                                 array(
2188                                         'lim' => 10,
2189                                         'conds' => array( "log_action != 'revision'" ),
2190                                         'showIfEmpty' => false,
2191                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2192                                 )
2193                         );
2194                 }
2195         }
2196
2197         /**
2198          * Attempt to show a custom editing introduction, if supplied
2199          *
2200          * @return bool
2201          */
2202         protected function showCustomIntro() {
2203                 if ( $this->editintro ) {
2204                         $title = Title::newFromText( $this->editintro );
2205                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2206                                 global $wgOut;
2207                                 // Added using template syntax, to take <noinclude>'s into account.
2208                                 $wgOut->addWikiTextTitleTidy( '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>', $this->mTitle );
2209                                 return true;
2210                         }
2211                 }
2212                 return false;
2213         }
2214
2215         /**
2216          * Gets an editable textual representation of $content.
2217          * The textual representation can be turned by into a Content object by the
2218          * toEditContent() method.
2219          *
2220          * If $content is null or false or a string, $content is returned unchanged.
2221          *
2222          * If the given Content object is not of a type that can be edited using
2223          * the text base EditPage, an exception will be raised. Set
2224          * $this->allowNonTextContent to true to allow editing of non-textual
2225          * content.
2226          *
2227          * @param Content|null|bool|string $content
2228          * @return string The editable text form of the content.
2229          *
2230          * @throws MWException If $content is not an instance of TextContent and
2231          *   $this->allowNonTextContent is not true.
2232          */
2233         protected function toEditText( $content ) {
2234                 if ( $content === null || $content === false ) {
2235                         return $content;
2236                 }
2237
2238                 if ( is_string( $content ) ) {
2239                         return $content;
2240                 }
2241
2242                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2243                         throw new MWException( 'This content model is not supported: '
2244                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2245                 }
2246
2247                 return $content->serialize( $this->contentFormat );
2248         }
2249
2250         /**
2251          * Turns the given text into a Content object by unserializing it.
2252          *
2253          * If the resulting Content object is not of a type that can be edited using
2254          * the text base EditPage, an exception will be raised. Set
2255          * $this->allowNonTextContent to true to allow editing of non-textual
2256          * content.
2257          *
2258          * @param string|null|bool $text Text to unserialize
2259          * @return Content The content object created from $text. If $text was false
2260          *   or null, false resp. null will be  returned instead.
2261          *
2262          * @throws MWException If unserializing the text results in a Content
2263          *   object that is not an instance of TextContent and
2264          *   $this->allowNonTextContent is not true.
2265          */
2266         protected function toEditContent( $text ) {
2267                 if ( $text === false || $text === null ) {
2268                         return $text;
2269                 }
2270
2271                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2272                         $this->contentModel, $this->contentFormat );
2273
2274                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2275                         throw new MWException( 'This content model is not supported: '
2276                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2277                 }
2278
2279                 return $content;
2280         }
2281
2282         /**
2283          * Send the edit form and related headers to $wgOut
2284          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2285          *     during form output near the top, for captchas and the like.
2286          */
2287         function showEditForm( $formCallback = null ) {
2288                 global $wgOut, $wgUser;
2289
2290                 wfProfileIn( __METHOD__ );
2291
2292                 # need to parse the preview early so that we know which templates are used,
2293                 # otherwise users with "show preview after edit box" will get a blank list
2294                 # we parse this near the beginning so that setHeaders can do the title
2295                 # setting work instead of leaving it in getPreviewText
2296                 $previewOutput = '';
2297                 if ( $this->formtype == 'preview' ) {
2298                         $previewOutput = $this->getPreviewText();
2299                 }
2300
2301                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2302
2303                 $this->setHeaders();
2304
2305                 if ( $this->showHeader() === false ) {
2306                         wfProfileOut( __METHOD__ );
2307                         return;
2308                 }
2309
2310                 $wgOut->addHTML( $this->editFormPageTop );
2311
2312                 if ( $wgUser->getOption( 'previewontop' ) ) {
2313                         $this->displayPreviewArea( $previewOutput, true );
2314                 }
2315
2316                 $wgOut->addHTML( $this->editFormTextTop );
2317
2318                 $showToolbar = true;
2319                 if ( $this->wasDeletedSinceLastEdit() ) {
2320                         if ( $this->formtype == 'save' ) {
2321                                 // Hide the toolbar and edit area, user can click preview to get it back
2322                                 // Add an confirmation checkbox and explanation.
2323                                 $showToolbar = false;
2324                         } else {
2325                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2326                                         'deletedwhileediting' );
2327                         }
2328                 }
2329
2330                 // @todo add EditForm plugin interface and use it here!
2331                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2332                 $wgOut->addHTML( Html::openElement(
2333                         'form',
2334                         array(
2335                                 'id' => self::EDITFORM_ID,
2336                                 'name' => self::EDITFORM_ID,
2337                                 'method' => 'post',
2338                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2339                                 'enctype' => 'multipart/form-data'
2340                         )
2341                 ) );
2342
2343                 if ( is_callable( $formCallback ) ) {
2344                         call_user_func_array( $formCallback, array( &$wgOut ) );
2345                 }
2346
2347                 // Add an empty field to trip up spambots
2348                 $wgOut->addHTML(
2349                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2350                         . Html::rawElement(
2351                                 'label',
2352                                 array( 'for' => 'wpAntiSpam' ),
2353                                 wfMessage( 'simpleantispam-label' )->parse()
2354                         )
2355                         . Xml::element(
2356                                 'input',
2357                                 array(
2358                                         'type' => 'text',
2359                                         'name' => 'wpAntispam',
2360                                         'id' => 'wpAntispam',
2361                                         'value' => ''
2362                                 )
2363                         )
2364                         . Xml::closeElement( 'div' )
2365                 );
2366
2367                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2368
2369                 // Put these up at the top to ensure they aren't lost on early form submission
2370                 $this->showFormBeforeText();
2371
2372                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2373                         $username = $this->lastDelete->user_name;
2374                         $comment = $this->lastDelete->log_comment;
2375
2376                         // It is better to not parse the comment at all than to have templates expanded in the middle
2377                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2378                         $key = $comment === ''
2379                                 ? 'confirmrecreate-noreason'
2380                                 : 'confirmrecreate';
2381                         $wgOut->addHTML(
2382                                 '<div class="mw-confirm-recreate">' .
2383                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2384                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2385                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2386                                 ) .
2387                                 '</div>'
2388                         );
2389                 }
2390
2391                 # When the summary is hidden, also hide them on preview/show changes
2392                 if ( $this->nosummary ) {
2393                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2394                 }
2395
2396                 # If a blank edit summary was previously provided, and the appropriate
2397                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2398                 # user being bounced back more than once in the event that a summary
2399                 # is not required.
2400                 #####
2401                 # For a bit more sophisticated detection of blank summaries, hash the
2402                 # automatic one and pass that in the hidden field wpAutoSummary.
2403                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2404                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2405                 }
2406
2407                 if ( $this->undidRev ) {
2408                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2409                 }
2410
2411                 if ( $this->hasPresetSummary ) {
2412                         // If a summary has been preset using &summary= we don't want to prompt for
2413                         // a different summary. Only prompt for a summary if the summary is blanked.
2414                         // (Bug 17416)
2415                         $this->autoSumm = md5( '' );
2416                 }
2417
2418                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2419                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2420
2421                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2422
2423                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2424                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2425
2426                 if ( $this->section == 'new' ) {
2427                         $this->showSummaryInput( true, $this->summary );
2428                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2429                 }
2430
2431                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2432
2433                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2434                         $wgOut->addHTML( EditPage::getEditToolbar() );
2435                 }
2436
2437                 if ( $this->blankArticle ) {
2438                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2439                 }
2440
2441                 if ( $this->isConflict ) {
2442                         // In an edit conflict bypass the overridable content form method
2443                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2444                         // resolved between page source edits and custom ui edits using the
2445                         // custom edit ui.
2446                         $this->textbox2 = $this->textbox1;
2447
2448                         $content = $this->getCurrentContent();
2449                         $this->textbox1 = $this->toEditText( $content );
2450
2451                         $this->showTextbox1();
2452                 } else {
2453                         $this->showContentForm();
2454                 }
2455
2456                 $wgOut->addHTML( $this->editFormTextAfterContent );
2457
2458                 $this->showStandardInputs();
2459
2460                 $this->showFormAfterText();
2461
2462                 $this->showTosSummary();
2463
2464                 $this->showEditTools();
2465
2466                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2467
2468                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2469                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2470
2471                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2472                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2473
2474                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2475                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2476
2477                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2478
2479                 if ( $this->isConflict ) {
2480                         try {
2481                                 $this->showConflict();
2482                         } catch ( MWContentSerializationException $ex ) {
2483                                 // this can't really happen, but be nice if it does.
2484                                 $msg = wfMessage(
2485                                         'content-failed-to-parse',
2486                                         $this->contentModel,
2487                                         $this->contentFormat,
2488                                         $ex->getMessage()
2489                                 );
2490                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2491                         }
2492                 }
2493
2494                 // Marker for detecting truncated form data.  This must be the last
2495                 // parameter sent in order to be of use, so do not move me.
2496                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2497                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2498
2499                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2500                         $this->displayPreviewArea( $previewOutput, false );
2501                 }
2502
2503                 wfProfileOut( __METHOD__ );
2504         }
2505
2506         /**
2507          * Extract the section title from current section text, if any.
2508          *
2509          * @param string $text
2510          * @return string|bool String or false
2511          */
2512         public static function extractSectionTitle( $text ) {
2513                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2514                 if ( !empty( $matches[2] ) ) {
2515                         global $wgParser;
2516                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2517                 } else {
2518                         return false;
2519                 }
2520         }
2521
2522         /**
2523          * @return bool
2524          */
2525         protected function showHeader() {
2526                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2527                 global $wgAllowUserCss, $wgAllowUserJs;
2528
2529                 if ( $this->mTitle->isTalkPage() ) {
2530                         $wgOut->addWikiMsg( 'talkpagetext' );
2531                 }
2532
2533                 // Add edit notices
2534                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2535
2536                 if ( $this->isConflict ) {
2537                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2538                         $this->edittime = $this->mArticle->getTimestamp();
2539                 } else {
2540                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2541                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2542                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2543                                 // Someone is welcome to try refactoring though
2544                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2545                                 return false;
2546                         }
2547
2548                         if ( $this->section != '' && $this->section != 'new' ) {
2549                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2550                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2551                                         if ( $sectionTitle !== false ) {
2552                                                 $this->summary = "/* $sectionTitle */ ";
2553                                         }
2554                                 }
2555                         }
2556
2557                         if ( $this->missingComment ) {
2558                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2559                         }
2560
2561                         if ( $this->missingSummary && $this->section != 'new' ) {
2562                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2563                         }
2564
2565                         if ( $this->missingSummary && $this->section == 'new' ) {
2566                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2567                         }
2568
2569                         if ( $this->blankArticle ) {
2570                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2571                         }
2572
2573                         if ( $this->hookError !== '' ) {
2574                                 $wgOut->addWikiText( $this->hookError );
2575                         }
2576
2577                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2578                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2579                         }
2580
2581                         if ( $this->section != 'new' ) {
2582                                 $revision = $this->mArticle->getRevisionFetched();
2583                                 if ( $revision ) {
2584                                         // Let sysop know that this will make private content public if saved
2585
2586                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2587                                                 $wgOut->wrapWikiMsg(
2588                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2589                                                         'rev-deleted-text-permission'
2590                                                 );
2591                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2592                                                 $wgOut->wrapWikiMsg(
2593                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2594                                                         'rev-deleted-text-view'
2595                                                 );
2596                                         }
2597
2598                                         if ( !$revision->isCurrent() ) {
2599                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2600                                                 $wgOut->addWikiMsg( 'editingold' );
2601                                         }
2602                                 } elseif ( $this->mTitle->exists() ) {
2603                                         // Something went wrong
2604
2605                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2606                                                 array( 'missing-revision', $this->oldid ) );
2607                                 }
2608                         }
2609                 }
2610
2611                 if ( wfReadOnly() ) {
2612                         $wgOut->wrapWikiMsg(
2613                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2614                                 array( 'readonlywarning', wfReadOnlyReason() )
2615                         );
2616                 } elseif ( $wgUser->isAnon() ) {
2617                         if ( $this->formtype != 'preview' ) {
2618                                 $wgOut->wrapWikiMsg(
2619                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2620                                         array( 'anoneditwarning',
2621                                                 // Log-in link
2622                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2623                                                 // Sign-up link
2624                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2625                                 );
2626                         } else {
2627                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2628                                         'anonpreviewwarning'
2629                                 );
2630                         }
2631                 } else {
2632                         if ( $this->isCssJsSubpage ) {
2633                                 # Check the skin exists
2634                                 if ( $this->isWrongCaseCssJsPage ) {
2635                                         $wgOut->wrapWikiMsg(
2636                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2637                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2638                                         );
2639                                 }
2640                                 if ( $this->formtype !== 'preview' ) {
2641                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2642                                                 $wgOut->wrapWikiMsg(
2643                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2644                                                         array( 'usercssyoucanpreview' )
2645                                                 );
2646                                         }
2647
2648                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2649                                                 $wgOut->wrapWikiMsg(
2650                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2651                                                         array( 'userjsyoucanpreview' )
2652                                                 );
2653                                         }
2654                                 }
2655                         }
2656                 }
2657
2658                 if ( $this->mTitle->isProtected( 'edit' ) &&
2659                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2660                 ) {
2661                         # Is the title semi-protected?
2662                         if ( $this->mTitle->isSemiProtected() ) {
2663                                 $noticeMsg = 'semiprotectedpagewarning';
2664                         } else {
2665                                 # Then it must be protected based on static groups (regular)
2666                                 $noticeMsg = 'protectedpagewarning';
2667                         }
2668                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2669                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2670                 }
2671                 if ( $this->mTitle->isCascadeProtected() ) {
2672                         # Is this page under cascading protection from some source pages?
2673                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2674                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2675                         $cascadeSourcesCount = count( $cascadeSources );
2676                         if ( $cascadeSourcesCount > 0 ) {
2677                                 # Explain, and list the titles responsible
2678                                 foreach ( $cascadeSources as $page ) {
2679                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2680                                 }
2681                         }
2682                         $notice .= '</div>';
2683                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2684                 }
2685                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2686                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2687                                 array( 'lim' => 1,
2688                                         'showIfEmpty' => false,
2689                                         'msgKey' => array( 'titleprotectedwarning' ),
2690                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2691                 }
2692
2693                 if ( $this->kblength === false ) {
2694                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2695                 }
2696
2697                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2698                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2699                                 array(
2700                                         'longpageerror',
2701                                         $wgLang->formatNum( $this->kblength ),
2702                                         $wgLang->formatNum( $wgMaxArticleSize )
2703                                 )
2704                         );
2705                 } else {
2706                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2707                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2708                                         array(
2709                                                 'longpage-hint',
2710                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2711                                                 strlen( $this->textbox1 )
2712                                         )
2713                                 );
2714                         }
2715                 }
2716                 # Add header copyright warning
2717                 $this->showHeaderCopyrightWarning();
2718
2719                 return true;
2720         }
2721
2722         /**
2723          * Standard summary input and label (wgSummary), abstracted so EditPage
2724          * subclasses may reorganize the form.
2725          * Note that you do not need to worry about the label's for=, it will be
2726          * inferred by the id given to the input. You can remove them both by
2727          * passing array( 'id' => false ) to $userInputAttrs.
2728          *
2729          * @param string $summary The value of the summary input
2730          * @param string $labelText The html to place inside the label
2731          * @param array $inputAttrs Array of attrs to use on the input
2732          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2733          *
2734          * @return array An array in the format array( $label, $input )
2735          */
2736         function getSummaryInput( $summary = "", $labelText = null,
2737                 $inputAttrs = null, $spanLabelAttrs = null
2738         ) {
2739                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2740                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2741                         'id' => 'wpSummary',
2742                         'maxlength' => '200',
2743                         'tabindex' => '1',
2744                         'size' => 60,
2745                         'spellcheck' => 'true',
2746                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2747
2748                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2749                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2750                         'id' => "wpSummaryLabel"
2751                 );
2752
2753                 $label = null;
2754                 if ( $labelText ) {
2755                         $label = Xml::tags(
2756                                 'label',
2757                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2758                                 $labelText
2759                         );
2760                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2761                 }
2762
2763                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2764
2765                 return array( $label, $input );
2766         }
2767
2768         /**
2769          * @param bool $isSubjectPreview True if this is the section subject/title
2770          *   up top, or false if this is the comment summary
2771          *   down below the textarea
2772          * @param string $summary The text of the summary to display
2773          */
2774         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2775                 global $wgOut, $wgContLang;
2776                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2777                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2778                 if ( $isSubjectPreview ) {
2779                         if ( $this->nosummary ) {
2780                                 return;
2781                         }
2782                 } else {
2783                         if ( !$this->mShowSummaryField ) {
2784                                 return;
2785                         }
2786                 }
2787                 $summary = $wgContLang->recodeForEdit( $summary );
2788                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2789                 list( $label, $input ) = $this->getSummaryInput(
2790                         $summary,
2791                         $labelText,
2792                         array( 'class' => $summaryClass ),
2793                         array()
2794                 );
2795                 $wgOut->addHTML( "{$label} {$input}" );
2796         }
2797
2798         /**
2799          * @param bool $isSubjectPreview True if this is the section subject/title
2800          *   up top, or false if this is the comment summary
2801          *   down below the textarea
2802          * @param string $summary The text of the summary to display
2803          * @return string
2804          */
2805         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2806                 // avoid spaces in preview, gets always trimmed on save
2807                 $summary = trim( $summary );
2808                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2809                         return "";
2810                 }
2811
2812                 global $wgParser;
2813
2814                 if ( $isSubjectPreview ) {
2815                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2816                                 ->inContentLanguage()->text();
2817                 }
2818
2819                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2820
2821                 $summary = wfMessage( $message )->parse()
2822                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2823                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2824         }
2825
2826         protected function showFormBeforeText() {
2827                 global $wgOut;
2828                 $section = htmlspecialchars( $this->section );
2829                 $wgOut->addHTML( <<<HTML
2830 <input type='hidden' value="{$section}" name="wpSection" />
2831 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2832 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2833 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2834
2835 HTML
2836                 );
2837                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2838                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2839                 }
2840         }
2841
2842         protected function showFormAfterText() {
2843                 global $wgOut, $wgUser;
2844                 /**
2845                  * To make it harder for someone to slip a user a page
2846                  * which submits an edit form to the wiki without their
2847                  * knowledge, a random token is associated with the login
2848                  * session. If it's not passed back with the submission,
2849                  * we won't save the page, or render user JavaScript and
2850                  * CSS previews.
2851                  *
2852                  * For anon editors, who may not have a session, we just
2853                  * include the constant suffix to prevent editing from
2854                  * broken text-mangling proxies.
2855                  */
2856                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2857         }
2858
2859         /**
2860          * Subpage overridable method for printing the form for page content editing
2861          * By default this simply outputs wpTextbox1
2862          * Subclasses can override this to provide a custom UI for editing;
2863          * be it a form, or simply wpTextbox1 with a modified content that will be
2864          * reverse modified when extracted from the post data.
2865          * Note that this is basically the inverse for importContentFormData
2866          */
2867         protected function showContentForm() {
2868                 $this->showTextbox1();
2869         }
2870
2871         /**
2872          * Method to output wpTextbox1
2873          * The $textoverride method can be used by subclasses overriding showContentForm
2874          * to pass back to this method.
2875          *
2876          * @param array $customAttribs Array of html attributes to use in the textarea
2877          * @param string $textoverride Optional text to override $this->textarea1 with
2878          */
2879         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2880                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2881                         $attribs = array( 'style' => 'display:none;' );
2882                 } else {
2883                         $classes = array(); // Textarea CSS
2884                         if ( $this->mTitle->isProtected( 'edit' ) &&
2885                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2886                         ) {
2887                                 # Is the title semi-protected?
2888                                 if ( $this->mTitle->isSemiProtected() ) {
2889                                         $classes[] = 'mw-textarea-sprotected';
2890                                 } else {
2891                                         # Then it must be protected based on static groups (regular)
2892                                         $classes[] = 'mw-textarea-protected';
2893                                 }
2894                                 # Is the title cascade-protected?
2895                                 if ( $this->mTitle->isCascadeProtected() ) {
2896                                         $classes[] = 'mw-textarea-cprotected';
2897                                 }
2898                         }
2899
2900                         $attribs = array( 'tabindex' => 1 );
2901
2902                         if ( is_array( $customAttribs ) ) {
2903                                 $attribs += $customAttribs;
2904                         }
2905
2906                         if ( count( $classes ) ) {
2907                                 if ( isset( $attribs['class'] ) ) {
2908                                         $classes[] = $attribs['class'];
2909                                 }
2910                                 $attribs['class'] = implode( ' ', $classes );
2911                         }
2912                 }
2913
2914                 $this->showTextbox(
2915                         $textoverride !== null ? $textoverride : $this->textbox1,
2916                         'wpTextbox1',
2917                         $attribs
2918                 );
2919         }
2920
2921         protected function showTextbox2() {
2922                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2923         }
2924
2925         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2926                 global $wgOut, $wgUser;
2927
2928                 $wikitext = $this->safeUnicodeOutput( $text );
2929                 if ( strval( $wikitext ) !== '' ) {
2930                         // Ensure there's a newline at the end, otherwise adding lines
2931                         // is awkward.
2932                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2933                         // mode will show an extra newline. A bit annoying.
2934                         $wikitext .= "\n";
2935                 }
2936
2937                 $attribs = $customAttribs + array(
2938                         'accesskey' => ',',
2939                         'id' => $name,
2940                         'cols' => $wgUser->getIntOption( 'cols' ),
2941                         'rows' => $wgUser->getIntOption( 'rows' ),
2942                         // Avoid PHP notices when appending preferences
2943                         // (appending allows customAttribs['style'] to still work).
2944                         'style' => ''
2945                 );
2946
2947                 $pageLang = $this->mTitle->getPageLanguage();
2948                 $attribs['lang'] = $pageLang->getCode();
2949                 $attribs['dir'] = $pageLang->getDir();
2950
2951                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2952         }
2953
2954         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2955                 global $wgOut;
2956                 $classes = array();
2957                 if ( $isOnTop ) {
2958                         $classes[] = 'ontop';
2959                 }
2960
2961                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2962
2963                 if ( $this->formtype != 'preview' ) {
2964                         $attribs['style'] = 'display: none;';
2965                 }
2966
2967                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2968
2969                 if ( $this->formtype == 'preview' ) {
2970                         $this->showPreview( $previewOutput );
2971                 }
2972
2973                 $wgOut->addHTML( '</div>' );
2974
2975                 if ( $this->formtype == 'diff' ) {
2976                         try {
2977                                 $this->showDiff();
2978                         } catch ( MWContentSerializationException $ex ) {
2979                                 $msg = wfMessage(
2980                                         'content-failed-to-parse',
2981                                         $this->contentModel,
2982                                         $this->contentFormat,
2983                                         $ex->getMessage()
2984                                 );
2985                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2986                         }
2987                 }
2988         }
2989
2990         /**
2991          * Append preview output to $wgOut.
2992          * Includes category rendering if this is a category page.
2993          *
2994          * @param string $text The HTML to be output for the preview.
2995          */
2996         protected function showPreview( $text ) {
2997                 global $wgOut;
2998                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2999                         $this->mArticle->openShowCategory();
3000                 }
3001                 # This hook seems slightly odd here, but makes things more
3002                 # consistent for extensions.
3003                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3004                 $wgOut->addHTML( $text );
3005                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3006                         $this->mArticle->closeShowCategory();
3007                 }
3008         }
3009
3010         /**
3011          * Get a diff between the current contents of the edit box and the
3012          * version of the page we're editing from.
3013          *
3014          * If this is a section edit, we'll replace the section as for final
3015          * save and then make a comparison.
3016          */
3017         function showDiff() {
3018                 global $wgUser, $wgContLang, $wgOut;
3019
3020                 $oldtitlemsg = 'currentrev';
3021                 # if message does not exist, show diff against the preloaded default
3022                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3023                         $oldtext = $this->mTitle->getDefaultMessageText();
3024                         if ( $oldtext !== false ) {
3025                                 $oldtitlemsg = 'defaultmessagetext';
3026                                 $oldContent = $this->toEditContent( $oldtext );
3027                         } else {
3028                                 $oldContent = null;
3029                         }
3030                 } else {
3031                         $oldContent = $this->getCurrentContent();
3032                 }
3033
3034                 $textboxContent = $this->toEditContent( $this->textbox1 );
3035
3036                 $newContent = $this->mArticle->replaceSectionContent(
3037                                                         $this->section, $textboxContent,
3038                                                         $this->summary, $this->edittime );
3039
3040                 if ( $newContent ) {
3041                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3042                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3043
3044                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3045                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3046                 }
3047
3048                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3049                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3050                         $newtitle = wfMessage( 'yourtext' )->parse();
3051
3052                         if ( !$oldContent ) {
3053                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3054                         }
3055
3056                         if ( !$newContent ) {
3057                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3058                         }
3059
3060                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3061                         $de->setContent( $oldContent, $newContent );
3062
3063                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3064                         $de->showDiffStyle();
3065                 } else {
3066                         $difftext = '';
3067                 }
3068
3069                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3070         }
3071
3072         /**
3073          * Show the header copyright warning.
3074          */
3075         protected function showHeaderCopyrightWarning() {
3076                 $msg = 'editpage-head-copy-warn';
3077                 if ( !wfMessage( $msg )->isDisabled() ) {
3078                         global $wgOut;
3079                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3080                                 'editpage-head-copy-warn' );
3081                 }
3082         }
3083
3084         /**
3085          * Give a chance for site and per-namespace customizations of
3086          * terms of service summary link that might exist separately
3087          * from the copyright notice.
3088          *
3089          * This will display between the save button and the edit tools,
3090          * so should remain short!
3091          */
3092         protected function showTosSummary() {
3093                 $msg = 'editpage-tos-summary';
3094                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3095                 if ( !wfMessage( $msg )->isDisabled() ) {
3096                         global $wgOut;
3097                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3098                         $wgOut->addWikiMsg( $msg );
3099                         $wgOut->addHTML( '</div>' );
3100                 }
3101         }
3102
3103         protected function showEditTools() {
3104                 global $wgOut;
3105                 $wgOut->addHTML( '<div class="mw-editTools">' .
3106                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3107                         '</div>' );
3108         }
3109
3110         /**
3111          * Get the copyright warning
3112          *
3113          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3114          * @return string
3115          */
3116         protected function getCopywarn() {
3117                 return self::getCopyrightWarning( $this->mTitle );
3118         }
3119
3120         /**
3121          * Get the copyright warning, by default returns wikitext
3122          *
3123          * @param Title $title
3124          * @param string $format Output format, valid values are any function of a Message object
3125          * @return string
3126          */
3127         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3128                 global $wgRightsText;
3129                 if ( $wgRightsText ) {
3130                         $copywarnMsg = array( 'copyrightwarning',
3131                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3132                                 $wgRightsText );
3133                 } else {
3134                         $copywarnMsg = array( 'copyrightwarning2',
3135                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3136                 }
3137                 // Allow for site and per-namespace customization of contribution/copyright notice.
3138                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3139
3140                 return "<div id=\"editpage-copywarn\">\n" .
3141                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3142         }
3143
3144         /**
3145          * Get the Limit report for page previews
3146          *
3147          * @since 1.22
3148          * @param ParserOutput $output ParserOutput object from the parse
3149          * @return string HTML
3150          */
3151         public static function getPreviewLimitReport( $output ) {
3152                 if ( !$output || !$output->getLimitReportData() ) {
3153                         return '';
3154                 }
3155
3156                 wfProfileIn( __METHOD__ );
3157
3158                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3159                         wfMessage( 'limitreport-title' )->parseAsBlock()
3160                 );
3161
3162                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3163                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3164
3165                 $limitReport .= Html::openElement( 'table', array(
3166                         'class' => 'preview-limit-report wikitable'
3167                 ) ) .
3168                         Html::openElement( 'tbody' );
3169
3170                 foreach ( $output->getLimitReportData() as $key => $value ) {
3171                         if ( wfRunHooks( 'ParserLimitReportFormat',
3172                                 array( $key, &$value, &$limitReport, true, true )
3173                         ) ) {
3174                                 $keyMsg = wfMessage( $key );
3175                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3176                                 if ( !$valueMsg->exists() ) {
3177                                         $valueMsg = new RawMessage( '$1' );
3178                                 }
3179                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3180                                         $limitReport .= Html::openElement( 'tr' ) .
3181                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3182                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3183                                                 Html::closeElement( 'tr' );
3184                                 }
3185                         }
3186                 }
3187
3188                 $limitReport .= Html::closeElement( 'tbody' ) .
3189                         Html::closeElement( 'table' ) .
3190                         Html::closeElement( 'div' );
3191
3192                 wfProfileOut( __METHOD__ );
3193
3194                 return $limitReport;
3195         }
3196
3197         protected function showStandardInputs( &$tabindex = 2 ) {
3198                 global $wgOut, $wgUseMediaWikiUIEverywhere;
3199                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3200
3201                 if ( $this->section != 'new' ) {
3202                         $this->showSummaryInput( false, $this->summary );
3203                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3204                 }
3205
3206                 $checkboxes = $this->getCheckboxes( $tabindex,
3207                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3208                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3209
3210                 // Show copyright warning.
3211                 $wgOut->addWikiText( $this->getCopywarn() );
3212                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3213
3214                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3215                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3216
3217                 $cancel = $this->getCancelLink();
3218                 if ( $cancel !== '' ) {
3219                         $cancel .= Html::element( 'span',
3220                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3221                                 wfMessage( 'pipe-separator' )->text() );
3222                 }
3223
3224                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3225                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3226                 $attrs = array(
3227                         'target' => 'helpwindow',
3228                         'href' => $edithelpurl,
3229                 );
3230                 if ( $wgUseMediaWikiUIEverywhere ) {
3231                         $attrs['class'] = 'mw-ui-button mw-ui-quiet';
3232                 }
3233                 $edithelp = Html::element( 'a', $attrs, wfMessage( 'edithelp' )->text() ) .
3234                         wfMessage( 'newwindow' )->parse();
3235
3236                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3237                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3238                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3239
3240                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3241
3242                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3243         }
3244
3245         /**
3246          * Show an edit conflict. textbox1 is already shown in showEditForm().
3247          * If you want to use another entry point to this function, be careful.
3248          */
3249         protected function showConflict() {
3250                 global $wgOut;
3251
3252                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3253                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3254
3255                         $content1 = $this->toEditContent( $this->textbox1 );
3256                         $content2 = $this->toEditContent( $this->textbox2 );
3257
3258                         $handler = ContentHandler::getForModelID( $this->contentModel );
3259                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3260                         $de->setContent( $content2, $content1 );
3261                         $de->showDiff(
3262                                 wfMessage( 'yourtext' )->parse(),
3263                                 wfMessage( 'storedversion' )->text()
3264                         );
3265
3266                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3267                         $this->showTextbox2();
3268                 }
3269         }
3270
3271         /**
3272          * @return string
3273          */
3274         public function getCancelLink() {
3275                 global $wgUseMediaWikiUIEverywhere;
3276                 $cancelParams = array();
3277                 if ( !$this->isConflict && $this->oldid > 0 ) {
3278                         $cancelParams['oldid'] = $this->oldid;
3279                 }
3280                 $attrs = array( 'id' => 'mw-editform-cancel' );
3281                 if ( $wgUseMediaWikiUIEverywhere ) {
3282                         $attrs['class'] = 'mw-ui-button mw-ui-quiet';
3283                 }
3284
3285                 return Linker::linkKnown(
3286                         $this->getContextTitle(),
3287                         wfMessage( 'cancel' )->parse(),
3288                         $attrs,
3289                         $cancelParams
3290                 );
3291         }
3292
3293         /**
3294          * Returns the URL to use in the form's action attribute.
3295          * This is used by EditPage subclasses when simply customizing the action
3296          * variable in the constructor is not enough. This can be used when the
3297          * EditPage lives inside of a Special page rather than a custom page action.
3298          *
3299          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3300          * @return string
3301          */
3302         protected function getActionURL( Title $title ) {
3303                 return $title->getLocalURL( array( 'action' => $this->action ) );
3304         }
3305
3306         /**
3307          * Check if a page was deleted while the user was editing it, before submit.
3308          * Note that we rely on the logging table, which hasn't been always there,
3309          * but that doesn't matter, because this only applies to brand new
3310          * deletes.
3311          * @return bool
3312          */
3313         protected function wasDeletedSinceLastEdit() {
3314                 if ( $this->deletedSinceEdit !== null ) {
3315                         return $this->deletedSinceEdit;
3316                 }
3317
3318                 $this->deletedSinceEdit = false;
3319
3320                 if ( $this->mTitle->isDeletedQuick() ) {
3321                         $this->lastDelete = $this->getLastDelete();
3322                         if ( $this->lastDelete ) {
3323                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3324                                 if ( $deleteTime > $this->starttime ) {
3325                                         $this->deletedSinceEdit = true;
3326                                 }
3327                         }
3328                 }
3329
3330                 return $this->deletedSinceEdit;
3331         }
3332
3333         /**
3334          * @return bool|stdClass
3335          */
3336         protected function getLastDelete() {
3337                 $dbr = wfGetDB( DB_SLAVE );
3338                 $data = $dbr->selectRow(
3339                         array( 'logging', 'user' ),
3340                         array(
3341                                 'log_type',
3342                                 'log_action',
3343                                 'log_timestamp',
3344                                 'log_user',
3345                                 'log_namespace',
3346                                 'log_title',
3347                                 'log_comment',
3348                                 'log_params',
3349                                 'log_deleted',
3350                                 'user_name'
3351                         ), array(
3352                                 'log_namespace' => $this->mTitle->getNamespace(),
3353                                 'log_title' => $this->mTitle->getDBkey(),
3354                                 'log_type' => 'delete',
3355                                 'log_action' => 'delete',
3356                                 'user_id=log_user'
3357                         ),
3358                         __METHOD__,
3359                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3360                 );
3361                 // Quick paranoid permission checks...
3362                 if ( is_object( $data ) ) {
3363                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3364                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3365                         }
3366
3367                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3368                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3369                         }
3370                 }
3371
3372                 return $data;
3373         }
3374
3375         /**
3376          * Get the rendered text for previewing.
3377          * @throws MWException
3378          * @return string
3379          */
3380         function getPreviewText() {
3381                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3382                 global $wgAllowUserCss, $wgAllowUserJs;
3383
3384                 wfProfileIn( __METHOD__ );
3385
3386                 if ( $wgRawHtml && !$this->mTokenOk ) {
3387                         // Could be an offsite preview attempt. This is very unsafe if
3388                         // HTML is enabled, as it could be an attack.
3389                         $parsedNote = '';
3390                         if ( $this->textbox1 !== '' ) {
3391                                 // Do not put big scary notice, if previewing the empty
3392                                 // string, which happens when you initially edit
3393                                 // a category page, due to automatic preview-on-open.
3394                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3395                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3396                         }
3397                         wfProfileOut( __METHOD__ );
3398                         return $parsedNote;
3399                 }
3400
3401                 $note = '';
3402
3403                 try {
3404                         $content = $this->toEditContent( $this->textbox1 );
3405
3406                         $previewHTML = '';
3407                         if ( !wfRunHooks(
3408                                 'AlternateEditPreview',
3409                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3410                         ) {
3411                                 wfProfileOut( __METHOD__ );
3412                                 return $previewHTML;
3413                         }
3414
3415                         # provide a anchor link to the editform
3416                         $continueEditing = '<span class="mw-continue-editing">' .
3417                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3418                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3419                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3420                                 if ( $this->mTokenOkExceptSuffix ) {
3421                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3422                                 } else {
3423                                         $note = wfMessage( 'session_fail_preview' )->plain();
3424                                 }
3425                         } elseif ( $this->incompleteForm ) {
3426                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3427                         } else {
3428                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3429                         }
3430
3431                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3432                         $parserOptions->setEditSection( false );
3433                         $parserOptions->setIsPreview( true );
3434                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3435
3436                         # don't parse non-wikitext pages, show message about preview
3437                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3438                                 if ( $this->mTitle->isCssJsSubpage() ) {
3439                                         $level = 'user';
3440                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3441                                         $level = 'site';
3442                                 } else {
3443                                         $level = false;
3444                                 }
3445
3446                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3447                                         $format = 'css';
3448                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3449                                                 $format = false;
3450                                         }
3451                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3452                                         $format = 'js';
3453                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3454                                                 $format = false;
3455                                         }
3456                                 } else {
3457                                         $format = false;
3458                                 }
3459
3460                                 # Used messages to make sure grep find them:
3461                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3462                                 if ( $level && $format ) {
3463                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3464                                                 wfMessage( "{$level}{$format}preview" )->text() .
3465                                                 ' ' . $continueEditing . "</div>";
3466                                 }
3467                         }
3468
3469                         # If we're adding a comment, we need to show the
3470                         # summary as the headline
3471                         if ( $this->section === "new" && $this->summary !== "" ) {
3472                                 $content = $content->addSectionHeader( $this->summary );
3473                         }
3474
3475                         $hook_args = array( $this, &$content );
3476                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3477                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3478
3479                         $parserOptions->enableLimitReport();
3480
3481                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3482                         # But it's now deprecated, so never mind
3483
3484                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3485                         $parserOutput = $content->getParserOutput(
3486                                 $this->getArticle()->getTitle(),
3487                                 null,
3488                                 $parserOptions
3489                         );
3490
3491                         $previewHTML = $parserOutput->getText();
3492                         $this->mParserOutput = $parserOutput;
3493                         $wgOut->addParserOutputMetadata( $parserOutput );
3494
3495                         if ( count( $parserOutput->getWarnings() ) ) {
3496                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3497                         }
3498                 } catch ( MWContentSerializationException $ex ) {
3499                         $m = wfMessage(
3500                                 'content-failed-to-parse',
3501                                 $this->contentModel,
3502                                 $this->contentFormat,
3503                                 $ex->getMessage()
3504                         );
3505                         $note .= "\n\n" . $m->parse();
3506                         $previewHTML = '';
3507                 }
3508
3509                 if ( $this->isConflict ) {
3510                         $conflict = '<h2 id="mw-previewconflict">'
3511                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3512                 } else {
3513                         $conflict = '<hr />';
3514                 }
3515
3516                 $previewhead = "<div class='previewnote'>\n" .
3517                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3518                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3519
3520                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3521                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3522                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3523                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3524
3525                 wfProfileOut( __METHOD__ );
3526                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3527         }
3528
3529         /**
3530          * @return array
3531          */
3532         function getTemplates() {
3533                 if ( $this->preview || $this->section != '' ) {
3534                         $templates = array();
3535                         if ( !isset( $this->mParserOutput ) ) {
3536                                 return $templates;
3537                         }
3538                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3539                                 foreach ( array_keys( $template ) as $dbk ) {
3540                                         $templates[] = Title::makeTitle( $ns, $dbk );
3541                                 }
3542                         }
3543                         return $templates;
3544                 } else {
3545                         return $this->mTitle->getTemplateLinksFrom();
3546                 }
3547         }
3548
3549         /**
3550          * Shows a bulletin board style toolbar for common editing functions.
3551          * It can be disabled in the user preferences.
3552          *
3553          * @return string
3554          */
3555         static function getEditToolbar() {
3556                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3557                 global $wgEnableUploads, $wgForeignFileRepos;
3558
3559                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3560
3561                 /**
3562                  * $toolarray is an array of arrays each of which includes the
3563                  * filename of the button image (without path), the opening
3564                  * tag, the closing tag, optionally a sample text that is
3565                  * inserted between the two when no selection is highlighted
3566                  * and.  The tip text is shown when the user moves the mouse
3567                  * over the button.
3568                  */
3569                 $toolarray = array(
3570                         array(
3571                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3572                                 'id'     => 'mw-editbutton-bold',
3573                                 'open'   => '\'\'\'',
3574                                 'close'  => '\'\'\'',
3575                                 'sample' => wfMessage( 'bold_sample' )->text(),
3576                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3577                         ),
3578                         array(
3579                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3580                                 'id'     => 'mw-editbutton-italic',
3581                                 'open'   => '\'\'',
3582                                 'close'  => '\'\'',
3583                                 'sample' => wfMessage( 'italic_sample' )->text(),
3584                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3585                         ),
3586                         array(
3587                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3588                                 'id'     => 'mw-editbutton-link',
3589                                 'open'   => '[[',
3590                                 'close'  => ']]',
3591                                 'sample' => wfMessage( 'link_sample' )->text(),
3592                                 'tip'    => wfMessage( 'link_tip' )->text(),
3593                         ),
3594                         array(
3595                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3596                                 'id'     => 'mw-editbutton-extlink',
3597                                 'open'   => '[',
3598                                 'close'  => ']',
3599                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3600                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3601                         ),
3602                         array(
3603                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3604                                 'id'     => 'mw-editbutton-headline',
3605                                 'open'   => "\n== ",
3606                                 'close'  => " ==\n",
3607                                 'sample' => wfMessage( 'headline_sample' )->text(),
3608                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3609                         ),
3610                         $imagesAvailable ? array(
3611                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3612                                 'id'     => 'mw-editbutton-image',
3613                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3614                                 'close'  => ']]',
3615                                 'sample' => wfMessage( 'image_sample' )->text(),
3616                                 'tip'    => wfMessage( 'image_tip' )->text(),
3617                         ) : false,
3618                         $imagesAvailable ? array(
3619                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3620                                 'id'     => 'mw-editbutton-media',
3621                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3622                                 'close'  => ']]',
3623                                 'sample' => wfMessage( 'media_sample' )->text(),
3624                                 'tip'    => wfMessage( 'media_tip' )->text(),
3625                         ) : false,
3626                         array(
3627                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3628                                 'id'     => 'mw-editbutton-nowiki',
3629                                 'open'   => "<nowiki>",
3630                                 'close'  => "</nowiki>",
3631                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3632                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3633                         ),
3634                         array(
3635                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3636                                 'id'     => 'mw-editbutton-signature',
3637                                 'open'   => '--~~~~',
3638                                 'close'  => '',
3639                                 'sample' => '',
3640                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3641                         ),
3642                         array(
3643                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3644                                 'id'     => 'mw-editbutton-hr',
3645                                 'open'   => "\n----\n",
3646                                 'close'  => '',
3647                                 'sample' => '',
3648                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3649                         )
3650                 );
3651
3652                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3653                 foreach ( $toolarray as $tool ) {
3654                         if ( !$tool ) {
3655                                 continue;
3656                         }
3657
3658                         $params = array(
3659                                 $wgStylePath . '/common/images/' . $tool['image'],
3660                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3661                                 // Older browsers show a "speedtip" type message only for ALT.
3662                                 // Ideally these should be different, realistically they
3663                                 // probably don't need to be.
3664                                 $tool['tip'],
3665                                 $tool['open'],
3666                                 $tool['close'],
3667                                 $tool['sample'],
3668                                 $tool['id'],
3669                         );
3670
3671                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3672                 }
3673
3674                 // This used to be called on DOMReady from mediawiki.action.edit, which
3675                 // ended up causing race conditions with the setup code above.
3676                 $script .= "\n" .
3677                         "// Create button bar\n" .
3678                         "$(function() { mw.toolbar.init(); } );\n";
3679
3680                 $script .= '});';
3681                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3682
3683                 $toolbar = '<div id="toolbar"></div>';
3684
3685                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3686
3687                 return $toolbar;
3688         }
3689
3690         /**
3691          * Returns an array of html code of the following checkboxes:
3692          * minor and watch
3693          *
3694          * @param int $tabindex Current tabindex
3695          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3696          *                 status of the checkbox
3697          *
3698          * @return array
3699          */
3700         public function getCheckboxes( &$tabindex, $checked ) {
3701                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3702
3703                 $checkboxes = array();
3704
3705                 // don't show the minor edit checkbox if it's a new page or section
3706                 if ( !$this->isNew ) {
3707                         $checkboxes['minor'] = '';
3708                         $minorLabel = wfMessage( 'minoredit' )->parse();
3709                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3710                                 $attribs = array(
3711                                         'tabindex' => ++$tabindex,
3712                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3713                                         'id' => 'wpMinoredit',
3714                                 );
3715                                 $minorEditHtml =
3716                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3717                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3718                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3719                                         ">{$minorLabel}</label>";
3720
3721                                 if ( $wgUseMediaWikiUIEverywhere ) {
3722                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3723                                                 $minorEditHtml .
3724                                         Html::closeElement( 'div' );
3725                                 } else {
3726                                         $checkboxes['minor'] = $minorEditHtml;
3727                                 }
3728                         }
3729                 }
3730
3731                 $watchLabel = wfMessage( 'watchthis' )->parse();
3732                 $checkboxes['watch'] = '';
3733                 if ( $wgUser->isLoggedIn() ) {
3734                         $attribs = array(
3735                                 'tabindex' => ++$tabindex,
3736                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3737                                 'id' => 'wpWatchthis',
3738                         );
3739                         $watchThisHtml =
3740                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3741                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3742                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3743                                 ">{$watchLabel}</label>";
3744                         if ( $wgUseMediaWikiUIEverywhere ) {
3745                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3746                                         $watchThisHtml .
3747                                         Html::closeElement( 'div' );
3748                         } else {
3749                                 $checkboxes['watch'] = $watchThisHtml;
3750                         }
3751                 }
3752                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3753                 return $checkboxes;
3754         }
3755
3756         /**
3757          * Returns an array of html code of the following buttons:
3758          * save, diff, preview and live
3759          *
3760          * @param int $tabindex Current tabindex
3761          *
3762          * @return array
3763          */
3764         public function getEditButtons( &$tabindex ) {
3765                 global $wgUseMediaWikiUIEverywhere;
3766
3767                 $buttons = array();
3768
3769                 $attribs = array(
3770                         'id' => 'wpSave',
3771                         'name' => 'wpSave',
3772                         'type' => 'submit',
3773                         'tabindex' => ++$tabindex,
3774                         'value' => wfMessage( 'savearticle' )->text(),
3775                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3776                 if ( $wgUseMediaWikiUIEverywhere ) {
3777                         $attribs['class'] = 'mw-ui-button mw-ui-constructive';
3778                 }
3779                 $buttons['save'] = Xml::element( 'input', $attribs, '' );
3780
3781                 ++$tabindex; // use the same for preview and live preview
3782                 $attribs = array(
3783                         'id' => 'wpPreview',
3784                         'name' => 'wpPreview',
3785                         'type' => 'submit',
3786                         'tabindex' => $tabindex,
3787                         'value' => wfMessage( 'showpreview' )->text(),
3788                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3789                 if ( $wgUseMediaWikiUIEverywhere ) {
3790                         $attribs['class'] = 'mw-ui-button mw-ui-progressive';
3791                 }
3792                 $buttons['preview'] = Xml::element( 'input', $attribs, '' );
3793                 $buttons['live'] = '';
3794
3795                 $attribs = array(
3796                         'id' => 'wpDiff',
3797                         'name' => 'wpDiff',
3798                         'type' => 'submit',
3799                         'tabindex' => ++$tabindex,
3800                         'value' => wfMessage( 'showdiff' )->text(),
3801                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3802                 if ( $wgUseMediaWikiUIEverywhere ) {
3803                         $attribs['class'] = 'mw-ui-button mw-ui-progressive';
3804                 }
3805                 $buttons['diff'] = Xml::element( 'input', $attribs, '' );
3806
3807                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3808                 return $buttons;
3809         }
3810
3811         /**
3812          * Output preview text only. This can be sucked into the edit page
3813          * via JavaScript, and saves the server time rendering the skin as
3814          * well as theoretically being more robust on the client (doesn't
3815          * disturb the edit box's undo history, won't eat your text on
3816          * failure, etc).
3817          *
3818          * @todo This doesn't include category or interlanguage links.
3819          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3820          *       or something...</s>" that might also require more skin
3821          *       initialization, so check whether that's a problem.
3822          */
3823         function livePreview() {
3824                 global $wgOut;
3825                 $wgOut->disable();
3826                 header( 'Content-type: text/xml; charset=utf-8' );
3827                 header( 'Cache-control: no-cache' );
3828
3829                 $previewText = $this->getPreviewText();
3830                 #$categories = $skin->getCategoryLinks();
3831
3832                 $s =
3833                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3834                         Xml::tags( 'livepreview', null,
3835                                 Xml::element( 'preview', null, $previewText )
3836                                 #.      Xml::element( 'category', null, $categories )
3837                         );
3838                 echo $s;
3839         }
3840
3841         /**
3842          * Creates a basic error page which informs the user that
3843          * they have attempted to edit a nonexistent section.
3844          */
3845         function noSuchSectionPage() {
3846                 global $wgOut;
3847
3848                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3849
3850                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3851                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3852                 $wgOut->addHTML( $res );
3853
3854                 $wgOut->returnToMain( false, $this->mTitle );
3855         }
3856
3857         /**
3858          * Show "your edit contains spam" page with your diff and text
3859          *
3860          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3861          */
3862         public function spamPageWithContent( $match = false ) {
3863                 global $wgOut, $wgLang;
3864                 $this->textbox2 = $this->textbox1;
3865
3866                 if ( is_array( $match ) ) {
3867                         $match = $wgLang->listToText( $match );
3868                 }
3869                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3870
3871                 $wgOut->addHTML( '<div id="spamprotected">' );
3872                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3873                 if ( $match ) {
3874                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3875                 }
3876                 $wgOut->addHTML( '</div>' );
3877
3878                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3879                 $this->showDiff();
3880
3881                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3882                 $this->showTextbox2();
3883
3884                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3885         }
3886
3887         /**
3888          * Check if the browser is on a blacklist of user-agents known to
3889          * mangle UTF-8 data on form submission. Returns true if Unicode
3890          * should make it through, false if it's known to be a problem.
3891          * @return bool
3892          */
3893         private function checkUnicodeCompliantBrowser() {
3894                 global $wgBrowserBlackList, $wgRequest;
3895
3896                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3897                 if ( $currentbrowser === false ) {
3898                         // No User-Agent header sent? Trust it by default...
3899                         return true;
3900                 }
3901
3902                 foreach ( $wgBrowserBlackList as $browser ) {
3903                         if ( preg_match( $browser, $currentbrowser ) ) {
3904                                 return false;
3905                         }
3906                 }
3907                 return true;
3908         }
3909
3910         /**
3911          * Filter an input field through a Unicode de-armoring process if it
3912          * came from an old browser with known broken Unicode editing issues.
3913          *
3914          * @param WebRequest $request
3915          * @param string $field
3916          * @return string
3917          */
3918         protected function safeUnicodeInput( $request, $field ) {
3919                 $text = rtrim( $request->getText( $field ) );
3920                 return $request->getBool( 'safemode' )
3921                         ? $this->unmakeSafe( $text )
3922                         : $text;
3923         }
3924
3925         /**
3926          * Filter an output field through a Unicode armoring process if it is
3927          * going to an old browser with known broken Unicode editing issues.
3928          *
3929          * @param string $text
3930          * @return string
3931          */
3932         protected function safeUnicodeOutput( $text ) {
3933                 global $wgContLang;
3934                 $codedText = $wgContLang->recodeForEdit( $text );
3935                 return $this->checkUnicodeCompliantBrowser()
3936                         ? $codedText
3937                         : $this->makeSafe( $codedText );
3938         }
3939
3940         /**
3941          * A number of web browsers are known to corrupt non-ASCII characters
3942          * in a UTF-8 text editing environment. To protect against this,
3943          * detected browsers will be served an armored version of the text,
3944          * with non-ASCII chars converted to numeric HTML character references.
3945          *
3946          * Preexisting such character references will have a 0 added to them
3947          * to ensure that round-trips do not alter the original data.
3948          *
3949          * @param string $invalue
3950          * @return string
3951          */
3952         private function makeSafe( $invalue ) {
3953                 // Armor existing references for reversibility.
3954                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3955
3956                 $bytesleft = 0;
3957                 $result = "";
3958                 $working = 0;
3959                 $valueLength = strlen( $invalue );
3960                 for ( $i = 0; $i < $valueLength; $i++ ) {
3961                         $bytevalue = ord( $invalue[$i] );
3962                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3963                                 $result .= chr( $bytevalue );
3964                                 $bytesleft = 0;
3965                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3966                                 $working = $working << 6;
3967                                 $working += ( $bytevalue & 0x3F );
3968                                 $bytesleft--;
3969                                 if ( $bytesleft <= 0 ) {
3970                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3971                                 }
3972                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3973                                 $working = $bytevalue & 0x1F;
3974                                 $bytesleft = 1;
3975                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3976                                 $working = $bytevalue & 0x0F;
3977                                 $bytesleft = 2;
3978                         } else { // 1111 0xxx
3979                                 $working = $bytevalue & 0x07;
3980                                 $bytesleft = 3;
3981                         }
3982                 }
3983                 return $result;
3984         }
3985
3986         /**
3987          * Reverse the previously applied transliteration of non-ASCII characters
3988          * back to UTF-8. Used to protect data from corruption by broken web browsers
3989          * as listed in $wgBrowserBlackList.
3990          *
3991          * @param string $invalue
3992          * @return string
3993          */
3994         private function unmakeSafe( $invalue ) {
3995                 $result = "";
3996                 $valueLength = strlen( $invalue );
3997                 for ( $i = 0; $i < $valueLength; $i++ ) {
3998                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3999                                 $i += 3;
4000                                 $hexstring = "";
4001                                 do {
4002                                         $hexstring .= $invalue[$i];
4003                                         $i++;
4004                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4005
4006                                 // Do some sanity checks. These aren't needed for reversibility,
4007                                 // but should help keep the breakage down if the editor
4008                                 // breaks one of the entities whilst editing.
4009                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
4010                                         $codepoint = hexdec( $hexstring );
4011                                         $result .= codepointToUtf8( $codepoint );
4012                                 } else {
4013                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4014                                 }
4015                         } else {
4016                                 $result .= substr( $invalue, $i, 1 );
4017                         }
4018                 }
4019                 // reverse the transform that we made for reversibility reasons.
4020                 return strtr( $result, array( "&#x0" => "&#x" ) );
4021         }
4022 }