includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: user tried to modify the content model, but is not allowed to do that
 149          * ( User::isAllowed('editcontentmodel') == false )
 150          */
 151         const AS_NO_CHANGE_CONTENT_MODEL = 235;
 152
 153         /**
 154          * Status: user tried to create self-redirect (redirect to the same article) and
 155          * wpIgnoreSelfRedirect == false
 156          */
 157         const AS_SELF_REDIRECT = 236;
 158
 159         /**
 160          * Status: an error relating to change tagging. Look at the message key for
 161          * more details
 162          */
 163         const AS_CHANGE_TAG_ERROR = 237;
 164
 165         /**
 166          * Status: can't parse content
 167          */
 168         const AS_PARSE_ERROR = 240;
 169
 170         /**
 171          * Status: when changing the content model is disallowed due to
 172          * $wgContentHandlerUseDB being false
 173          */
 174         const AS_CANNOT_USE_CUSTOM_MODEL = 241;
 175
 176         /**
 177          * HTML id and name for the beginning of the edit form.
 178          */
 179         const EDITFORM_ID = 'editform';
 180
 181         /**
 182          * Prefix of key for cookie used to pass post-edit state.
 183          * The revision id edited is added after this
 184          */
 185         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 186
 187         /**
 188          * Duration of PostEdit cookie, in seconds.
 189          * The cookie will be removed instantly if the JavaScript runs.
 190          *
 191          * Otherwise, though, we don't want the cookies to accumulate.
 192          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 193          * limit of only 20 cookies per domain. This still applies at least to some
 194          * versions of IE without full updates:
 195          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 196          *
 197          * A value of 20 minutes should be enough to take into account slow loads and minor
 198          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 199          */
 200         const POST_EDIT_COOKIE_DURATION = 1200;
 201
 202         /** @var Article */
 203         public $mArticle;
 204         /** @var WikiPage */
 205         private $page;
 206
 207         /** @var Title */
 208         public $mTitle;
 209
 210         /** @var null|Title */
 211         private $mContextTitle = null;
 212
 213         /** @var string */
 214         public $action = 'submit';
 215
 216         /** @var bool */
 217         public $isConflict = false;
 218
 219         /** @var bool */
 220         public $isCssJsSubpage = false;
 221
 222         /** @var bool */
 223         public $isCssSubpage = false;
 224
 225         /** @var bool */
 226         public $isJsSubpage = false;
 227
 228         /** @var bool */
 229         public $isWrongCaseCssJsPage = false;
 230
 231         /** @var bool New page or new section */
 232         public $isNew = false;
 233
 234         /** @var bool */
 235         public $deletedSinceEdit;
 236
 237         /** @var string */
 238         public $formtype;
 239
 240         /** @var bool */
 241         public $firsttime;
 242
 243         /** @var bool|stdClass */
 244         public $lastDelete;
 245
 246         /** @var bool */
 247         public $mTokenOk = false;
 248
 249         /** @var bool */
 250         public $mTokenOkExceptSuffix = false;
 251
 252         /** @var bool */
 253         public $mTriedSave = false;
 254
 255         /** @var bool */
 256         public $incompleteForm = false;
 257
 258         /** @var bool */
 259         public $tooBig = false;
 260
 261         /** @var bool */
 262         public $kblength = false;
 263
 264         /** @var bool */
 265         public $missingComment = false;
 266
 267         /** @var bool */
 268         public $missingSummary = false;
 269
 270         /** @var bool */
 271         public $allowBlankSummary = false;
 272
 273         /** @var bool */
 274         protected $blankArticle = false;
 275
 276         /** @var bool */
 277         protected $allowBlankArticle = false;
 278
 279         /** @var bool */
 280         protected $selfRedirect = false;
 281
 282         /** @var bool */
 283         protected $allowSelfRedirect = false;
 284
 285         /** @var string */
 286         public $autoSumm = '';
 287
 288         /** @var string */
 289         public $hookError = '';
 290
 291         /** @var ParserOutput */
 292         public $mParserOutput;
 293
 294         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 295         public $hasPresetSummary = false;
 296
 297         /** @var bool */
 298         public $mBaseRevision = false;
 299
 300         /** @var bool */
 301         public $mShowSummaryField = true;
 302
 303         # Form values
 304
 305         /** @var bool */
 306         public $save = false;
 307
 308         /** @var bool */
 309         public $preview = false;
 310
 311         /** @var bool */
 312         public $diff = false;
 313
 314         /** @var bool */
 315         public $minoredit = false;
 316
 317         /** @var bool */
 318         public $watchthis = false;
 319
 320         /** @var bool */
 321         public $recreate = false;
 322
 323         /** @var string */
 324         public $textbox1 = '';
 325
 326         /** @var string */
 327         public $textbox2 = '';
 328
 329         /** @var string */
 330         public $summary = '';
 331
 332         /** @var bool */
 333         public $nosummary = false;
 334
 335         /** @var string */
 336         public $edittime = '';
 337
 338         /** @var string */
 339         public $section = '';
 340
 341         /** @var string */
 342         public $sectiontitle = '';
 343
 344         /** @var string */
 345         public $starttime = '';
 346
 347         /** @var int */
 348         public $oldid = 0;
 349
 350         /** @var int */
 351         public $parentRevId = 0;
 352
 353         /** @var string */
 354         public $editintro = '';
 355
 356         /** @var null */
 357         public $scrolltop = null;
 358
 359         /** @var bool */
 360         public $bot = true;
 361
 362         /** @var null|string */
 363         public $contentModel = null;
 364
 365         /** @var null|string */
 366         public $contentFormat = null;
 367
 368         /** @var null|array */
 369         public $changeTags = null;
 370
 371         # Placeholders for text injection by hooks (must be HTML)
 372         # extensions should take care to _append_ to the present value
 373
 374         /** @var string Before even the preview */
 375         public $editFormPageTop = '';
 376         public $editFormTextTop = '';
 377         public $editFormTextBeforeContent = '';
 378         public $editFormTextAfterWarn = '';
 379         public $editFormTextAfterTools = '';
 380         public $editFormTextBottom = '';
 381         public $editFormTextAfterContent = '';
 382         public $previewTextAfterContent = '';
 383         public $mPreloadContent = null;
 384
 385         /* $didSave should be set to true whenever an article was successfully altered. */
 386         public $didSave = false;
 387         public $undidRev = 0;
 388
 389         public $suppressIntro = false;
 390
 391         /** @var bool */
 392         protected $edit;
 393
 394         /**
 395          * @var bool Set in ApiEditPage, based on ContentHandler::allowsDirectApiEditing
 396          */
 397         private $enableApiEditOverride = false;
 398
 399         /**
 400          * @param Article $article
 401          */
 402         public function __construct( Article $article ) {
 403                 $this->mArticle = $article;
 404                 $this->page = $article->getPage(); // model object
 405                 $this->mTitle = $article->getTitle();
 406
 407                 $this->contentModel = $this->mTitle->getContentModel();
 408
 409                 $handler = ContentHandler::getForModelID( $this->contentModel );
 410                 $this->contentFormat = $handler->getDefaultFormat();
 411         }
 412
 413         /**
 414          * @return Article
 415          */
 416         public function getArticle() {
 417                 return $this->mArticle;
 418         }
 419
 420         /**
 421          * @since 1.19
 422          * @return Title
 423          */
 424         public function getTitle() {
 425                 return $this->mTitle;
 426         }
 427
 428         /**
 429          * Set the context Title object
 430          *
 431          * @param Title|null $title Title object or null
 432          */
 433         public function setContextTitle( $title ) {
 434                 $this->mContextTitle = $title;
 435         }
 436
 437         /**
 438          * Get the context title object.
 439          * If not set, $wgTitle will be returned. This behavior might change in
 440          * the future to return $this->mTitle instead.
 441          *
 442          * @return Title
 443          */
 444         public function getContextTitle() {
 445                 if ( is_null( $this->mContextTitle ) ) {
 446                         global $wgTitle;
 447                         return $wgTitle;
 448                 } else {
 449                         return $this->mContextTitle;
 450                 }
 451         }
 452
 453         /**
 454          * Returns if the given content model is editable.
 455          *
 456          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 457          * @return bool
 458          * @throws MWException If $modelId has no known handler
 459          */
 460         public function isSupportedContentModel( $modelId ) {
 461                 return $this->enableApiEditOverride === true ||
 462                         ContentHandler::getForModelID( $modelId )->supportsDirectEditing();
 463         }
 464
 465         /**
 466          * Allow editing of content that supports API direct editing, but not general
 467          * direct editing. Set to false by default.
 468          *
 469          * @param bool $enableOverride
 470          */
 471         public function setApiEditOverride( $enableOverride ) {
 472                 $this->enableApiEditOverride = $enableOverride;
 473         }
 474
 475         function submit() {
 476                 $this->edit();
 477         }
 478
 479         /**
 480          * This is the function that gets called for "action=edit". It
 481          * sets up various member variables, then passes execution to
 482          * another function, usually showEditForm()
 483          *
 484          * The edit form is self-submitting, so that when things like
 485          * preview and edit conflicts occur, we get the same form back
 486          * with the extra stuff added.  Only when the final submission
 487          * is made and all is well do we actually save and redirect to
 488          * the newly-edited page.
 489          */
 490         function edit() {
 491                 global $wgOut, $wgRequest, $wgUser;
 492                 // Allow extensions to modify/prevent this form or submission
 493                 if ( !Hooks::run( 'AlternateEdit', array( $this ) ) ) {
 494                         return;
 495                 }
 496
 497                 wfDebug( __METHOD__ . ": enter\n" );
 498
 499                 // If they used redlink=1 and the page exists, redirect to the main article
 500                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 501                         $wgOut->redirect( $this->mTitle->getFullURL() );
 502                         return;
 503                 }
 504
 505                 $this->importFormData( $wgRequest );
 506                 $this->firsttime = false;
 507
 508                 if ( wfReadOnly() && $this->save ) {
 509                         // Force preview
 510                         $this->save = false;
 511                         $this->preview = true;
 512                 }
 513
 514                 if ( $this->save ) {
 515                         $this->formtype = 'save';
 516                 } elseif ( $this->preview ) {
 517                         $this->formtype = 'preview';
 518                 } elseif ( $this->diff ) {
 519                         $this->formtype = 'diff';
 520                 } else { # First time through
 521                         $this->firsttime = true;
 522                         if ( $this->previewOnOpen() ) {
 523                                 $this->formtype = 'preview';
 524                         } else {
 525                                 $this->formtype = 'initial';
 526                         }
 527                 }
 528
 529                 $permErrors = $this->getEditPermissionErrors( $this->save ? 'secure' : 'full' );
 530                 if ( $permErrors ) {
 531                         wfDebug( __METHOD__ . ": User can't edit\n" );
 532                         // Auto-block user's IP if the account was "hard" blocked
 533                         $user = $wgUser;
 534                         DeferredUpdates::addCallableUpdate( function() use ( $user ) {
 535                                 $user->spreadAnyEditBlock();
 536                         } );
 537
 538                         $this->displayPermissionsError( $permErrors );
 539
 540                         return;
 541                 }
 542
 543                 $revision = $this->mArticle->getRevisionFetched();
 544                 // Disallow editing revisions with content models different from the current one
 545                 if ( $revision && $revision->getContentModel() !== $this->contentModel ) {
 546                         $this->displayViewSourcePage(
 547                                 $this->getContentObject(),
 548                                 wfMessage(
 549                                         'contentmodelediterror',
 550                                         $revision->getContentModel(),
 551                                         $this->contentModel
 552                                 )->plain()
 553                         );
 554                         return;
 555                 }
 556
 557                 $this->isConflict = false;
 558                 // css / js subpages of user pages get a special treatment
 559                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 560                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 561                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 562                 // @todo FIXME: Silly assignment.
 563                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 564
 565                 # Show applicable editing introductions
 566                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 567                         $this->showIntro();
 568                 }
 569
 570                 # Attempt submission here.  This will check for edit conflicts,
 571                 # and redundantly check for locked database, blocked IPs, etc.
 572                 # that edit() already checked just in case someone tries to sneak
 573                 # in the back door with a hand-edited submission URL.
 574
 575                 if ( 'save' == $this->formtype ) {
 576                         $resultDetails = null;
 577                         $status = $this->attemptSave( $resultDetails );
 578                         if ( !$this->handleStatus( $status, $resultDetails ) ) {
 579                                 return;
 580                         }
 581                 }
 582
 583                 # First time through: get contents, set time for conflict
 584                 # checking, etc.
 585                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 586                         if ( $this->initialiseForm() === false ) {
 587                                 $this->noSuchSectionPage();
 588                                 return;
 589                         }
 590
 591                         if ( !$this->mTitle->getArticleID() ) {
 592                                 Hooks::run( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 593                         } else {
 594                                 Hooks::run( 'EditFormInitialText', array( $this ) );
 595                         }
 596
 597                 }
 598
 599                 $this->showEditForm();
 600         }
 601
 602         /**
 603          * @param string $rigor Same format as Title::getUserPermissionErrors()
 604          * @return array
 605          */
 606         protected function getEditPermissionErrors( $rigor = 'secure' ) {
 607                 global $wgUser;
 608
 609                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser, $rigor );
 610                 # Can this title be created?
 611                 if ( !$this->mTitle->exists() ) {
 612                         $permErrors = array_merge(
 613                                 $permErrors,
 614                                 wfArrayDiff2(
 615                                         $this->mTitle->getUserPermissionsErrors( 'create', $wgUser, $rigor ),
 616                                         $permErrors
 617                                 )
 618                         );
 619                 }
 620                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 621                 $remove = array();
 622                 foreach ( $permErrors as $error ) {
 623                         if ( ( $this->preview || $this->diff )
 624                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 625                         ) {
 626                                 $remove[] = $error;
 627                         }
 628                 }
 629                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 630
 631                 return $permErrors;
 632         }
 633
 634         /**
 635          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 636          * but with the following differences:
 637          * - If redlink=1, the user will be redirected to the page
 638          * - If there is content to display or the error occurs while either saving,
 639          *   previewing or showing the difference, it will be a
 640          *   "View source for ..." page displaying the source code after the error message.
 641          *
 642          * @since 1.19
 643          * @param array $permErrors Array of permissions errors, as returned by
 644          *    Title::getUserPermissionsErrors().
 645          * @throws PermissionsError
 646          */
 647         protected function displayPermissionsError( array $permErrors ) {
 648                 global $wgRequest, $wgOut;
 649
 650                 if ( $wgRequest->getBool( 'redlink' ) ) {
 651                         // The edit page was reached via a red link.
 652                         // Redirect to the article page and let them click the edit tab if
 653                         // they really want a permission error.
 654                         $wgOut->redirect( $this->mTitle->getFullURL() );
 655                         return;
 656                 }
 657
 658                 $content = $this->getContentObject();
 659
 660                 # Use the normal message if there's nothing to display
 661                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 662                         $action = $this->mTitle->exists() ? 'edit' :
 663                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 664                         throw new PermissionsError( $action, $permErrors );
 665                 }
 666
 667                 $this->displayViewSourcePage(
 668                         $content,
 669                         $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' )
 670                 );
 671         }
 672
 673         /**
 674          * Display a read-only View Source page
 675          * @param Content $content content object
 676          * @param string $errorMessage additional wikitext error message to display
 677          */
 678         protected function displayViewSourcePage( Content $content, $errorMessage = '' ) {
 679                 global $wgOut;
 680
 681                 Hooks::run( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 682
 683                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 684                 $wgOut->setPageTitle( wfMessage(
 685                         'viewsource-title',
 686                         $this->getContextTitle()->getPrefixedText()
 687                 ) );
 688                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 689                 $wgOut->addHTML( $this->editFormPageTop );
 690                 $wgOut->addHTML( $this->editFormTextTop );
 691
 692                 if ( $errorMessage !== '' ) {
 693                         $wgOut->addWikiText( $errorMessage );
 694                         $wgOut->addHTML( "<hr />\n" );
 695                 }
 696
 697                 # If the user made changes, preserve them when showing the markup
 698                 # (This happens when a user is blocked during edit, for instance)
 699                 if ( !$this->firsttime ) {
 700                         $text = $this->textbox1;
 701                         $wgOut->addWikiMsg( 'viewyourtext' );
 702                 } else {
 703                         try {
 704                                 $text = $this->toEditText( $content );
 705                         } catch ( MWException $e ) {
 706                                 # Serialize using the default format if the content model is not supported
 707                                 # (e.g. for an old revision with a different model)
 708                                 $text = $content->serialize();
 709                         }
 710                         $wgOut->addWikiMsg( 'viewsourcetext' );
 711                 }
 712
 713                 $wgOut->addHTML( $this->editFormTextBeforeContent );
 714                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 715                 $wgOut->addHTML( $this->editFormTextAfterContent );
 716
 717                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 718                         Linker::formatTemplates( $this->getTemplates() ) ) );
 719
 720                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 721
 722                 $wgOut->addHTML( $this->editFormTextBottom );
 723                 if ( $this->mTitle->exists() ) {
 724                         $wgOut->returnToMain( null, $this->mTitle );
 725                 }
 726         }
 727
 728         /**
 729          * Should we show a preview when the edit form is first shown?
 730          *
 731          * @return bool
 732          */
 733         protected function previewOnOpen() {
 734                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 735                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 736                         // Explicit override from request
 737                         return true;
 738                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 739                         // Explicit override from request
 740                         return false;
 741                 } elseif ( $this->section == 'new' ) {
 742                         // Nothing *to* preview for new sections
 743                         return false;
 744                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 745                         && $wgUser->getOption( 'previewonfirst' )
 746                 ) {
 747                         // Standard preference behavior
 748                         return true;
 749                 } elseif ( !$this->mTitle->exists()
 750                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 751                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 752                 ) {
 753                         // Categories are special
 754                         return true;
 755                 } else {
 756                         return false;
 757                 }
 758         }
 759
 760         /**
 761          * Checks whether the user entered a skin name in uppercase,
 762          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 763          *
 764          * @return bool
 765          */
 766         protected function isWrongCaseCssJsPage() {
 767                 if ( $this->mTitle->isCssJsSubpage() ) {
 768                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 769                         $skins = array_merge(
 770                                 array_keys( Skin::getSkinNames() ),
 771                                 array( 'common' )
 772                         );
 773                         return !in_array( $name, $skins )
 774                                 && in_array( strtolower( $name ), $skins );
 775                 } else {
 776                         return false;
 777                 }
 778         }
 779
 780         /**
 781          * Returns whether section editing is supported for the current page.
 782          * Subclasses may override this to replace the default behavior, which is
 783          * to check ContentHandler::supportsSections.
 784          *
 785          * @return bool True if this edit page supports sections, false otherwise.
 786          */
 787         protected function isSectionEditSupported() {
 788                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 789                 return $contentHandler->supportsSections();
 790         }
 791
 792         /**
 793          * This function collects the form data and uses it to populate various member variables.
 794          * @param WebRequest $request
 795          * @throws ErrorPageError
 796          */
 797         function importFormData( &$request ) {
 798                 global $wgContLang, $wgUser;
 799
 800                 # Section edit can come from either the form or a link
 801                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 802
 803                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 804                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 805                 }
 806
 807                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 808
 809                 if ( $request->wasPosted() ) {
 810                         # These fields need to be checked for encoding.
 811                         # Also remove trailing whitespace, but don't remove _initial_
 812                         # whitespace from the text boxes. This may be significant formatting.
 813                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 814                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 815                                 // Skip this if wpTextbox2 has input, it indicates that we came
 816                                 // from a conflict page with raw page text, not a custom form
 817                                 // modified by subclasses
 818                                 $textbox1 = $this->importContentFormData( $request );
 819                                 if ( $textbox1 !== null ) {
 820                                         $this->textbox1 = $textbox1;
 821                                 }
 822                         }
 823
 824                         # Truncate for whole multibyte characters
 825                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 826
 827                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 828                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 829                         # section titles.
 830                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 831
 832                         # Treat sectiontitle the same way as summary.
 833                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 834                         # currently doing double duty as both edit summary and section title. Right now this
 835                         # is just to allow API edits to work around this limitation, but this should be
 836                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 837                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 838                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 839
 840                         $this->edittime = $request->getVal( 'wpEdittime' );
 841                         $this->starttime = $request->getVal( 'wpStarttime' );
 842
 843                         $undidRev = $request->getInt( 'wpUndidRevision' );
 844                         if ( $undidRev ) {
 845                                 $this->undidRev = $undidRev;
 846                         }
 847
 848                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 849
 850                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 851                                 // wpTextbox1 field is missing, possibly due to being "too big"
 852                                 // according to some filter rules such as Suhosin's setting for
 853                                 // suhosin.request.max_value_length (d'oh)
 854                                 $this->incompleteForm = true;
 855                         } else {
 856                                 // If we receive the last parameter of the request, we can fairly
 857                                 // claim the POST request has not been truncated.
 858
 859                                 // TODO: softened the check for cutover.  Once we determine
 860                                 // that it is safe, we should complete the transition by
 861                                 // removing the "edittime" clause.
 862                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' )
 863                                         && is_null( $this->edittime ) );
 864                         }
 865                         if ( $this->incompleteForm ) {
 866                                 # If the form is incomplete, force to preview.
 867                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 868                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 869                                 $this->preview = true;
 870                         } else {
 871                                 $this->preview = $request->getCheck( 'wpPreview' );
 872                                 $this->diff = $request->getCheck( 'wpDiff' );
 873
 874                                 // Remember whether a save was requested, so we can indicate
 875                                 // if we forced preview due to session failure.
 876                                 $this->mTriedSave = !$this->preview;
 877
 878                                 if ( $this->tokenOk( $request ) ) {
 879                                         # Some browsers will not report any submit button
 880                                         # if the user hits enter in the comment box.
 881                                         # The unmarked state will be assumed to be a save,
 882                                         # if the form seems otherwise complete.
 883                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 884                                 } elseif ( $this->diff ) {
 885                                         # Failed token check, but only requested "Show Changes".
 886                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 887                                 } else {
 888                                         # Page might be a hack attempt posted from
 889                                         # an external site. Preview instead of saving.
 890                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 891                                         $this->preview = true;
 892                                 }
 893                         }
 894                         $this->save = !$this->preview && !$this->diff;
 895                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 896                                 $this->edittime = null;
 897                         }
 898
 899                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 900                                 $this->starttime = null;
 901                         }
 902
 903                         $this->recreate = $request->getCheck( 'wpRecreate' );
 904
 905                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 906                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 907
 908                         # Don't force edit summaries when a user is editing their own user or talk page
 909                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 910                                 && $this->mTitle->getText() == $wgUser->getName()
 911                         ) {
 912                                 $this->allowBlankSummary = true;
 913                         } else {
 914                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 915                                         || !$wgUser->getOption( 'forceeditsummary' );
 916                         }
 917
 918                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 919
 920                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 921                         $this->allowSelfRedirect = $request->getBool( 'wpIgnoreSelfRedirect' );
 922
 923                         $changeTags = $request->getVal( 'wpChangeTags' );
 924                         if ( is_null( $changeTags ) || $changeTags === '' ) {
 925                                 $this->changeTags = array();
 926                         } else {
 927                                 $this->changeTags = array_filter( array_map( 'trim', explode( ',',
 928                                         $changeTags ) ) );
 929                         }
 930                 } else {
 931                         # Not a posted form? Start with nothing.
 932                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 933                         $this->textbox1 = '';
 934                         $this->summary = '';
 935                         $this->sectiontitle = '';
 936                         $this->edittime = '';
 937                         $this->starttime = wfTimestampNow();
 938                         $this->edit = false;
 939                         $this->preview = false;
 940                         $this->save = false;
 941                         $this->diff = false;
 942                         $this->minoredit = false;
 943                         // Watch may be overridden by request parameters
 944                         $this->watchthis = $request->getBool( 'watchthis', false );
 945                         $this->recreate = false;
 946
 947                         // When creating a new section, we can preload a section title by passing it as the
 948                         // preloadtitle parameter in the URL (Bug 13100)
 949                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 950                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 951                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 952                                 $this->summary = $request->getVal( 'preloadtitle' );
 953                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 954                                 $this->summary = $request->getText( 'summary' );
 955                                 if ( $this->summary !== '' ) {
 956                                         $this->hasPresetSummary = true;
 957                                 }
 958                         }
 959
 960                         if ( $request->getVal( 'minor' ) ) {
 961                                 $this->minoredit = true;
 962                         }
 963                 }
 964
 965                 $this->oldid = $request->getInt( 'oldid' );
 966                 $this->parentRevId = $request->getInt( 'parentRevId' );
 967
 968                 $this->bot = $request->getBool( 'bot', true );
 969                 $this->nosummary = $request->getBool( 'nosummary' );
 970
 971                 // May be overridden by revision.
 972                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 973                 // May be overridden by revision.
 974                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 975
 976                 if ( !ContentHandler::getForModelID( $this->contentModel )
 977                         ->isSupportedFormat( $this->contentFormat )
 978                 ) {
 979                         throw new ErrorPageError(
 980                                 'editpage-notsupportedcontentformat-title',
 981                                 'editpage-notsupportedcontentformat-text',
 982                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 983                         );
 984                 }
 985
 986                 /**
 987                  * @todo Check if the desired model is allowed in this namespace, and if
 988                  *   a transition from the page's current model to the new model is
 989                  *   allowed.
 990                  */
 991
 992                 $this->editintro = $request->getText( 'editintro',
 993                         // Custom edit intro for new sections
 994                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 995
 996                 // Allow extensions to modify form data
 997                 Hooks::run( 'EditPage::importFormData', array( $this, $request ) );
 998
 999         }
1000
1001         /**
1002          * Subpage overridable method for extracting the page content data from the
1003          * posted form to be placed in $this->textbox1, if using customized input
1004          * this method should be overridden and return the page text that will be used
1005          * for saving, preview parsing and so on...
1006          *
1007          * @param WebRequest $request
1008          * @return string|null
1009          */
1010         protected function importContentFormData( &$request ) {
1011                 return; // Don't do anything, EditPage already extracted wpTextbox1
1012         }
1013
1014         /**
1015          * Initialise form fields in the object
1016          * Called on the first invocation, e.g. when a user clicks an edit link
1017          * @return bool If the requested section is valid
1018          */
1019         function initialiseForm() {
1020                 global $wgUser;
1021                 $this->edittime = $this->page->getTimestamp();
1022
1023                 $content = $this->getContentObject( false ); # TODO: track content object?!
1024                 if ( $content === false ) {
1025                         return false;
1026                 }
1027                 $this->textbox1 = $this->toEditText( $content );
1028
1029                 // activate checkboxes if user wants them to be always active
1030                 # Sort out the "watch" checkbox
1031                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1032                         # Watch all edits
1033                         $this->watchthis = true;
1034                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1035                         # Watch creations
1036                         $this->watchthis = true;
1037                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
1038                         # Already watched
1039                         $this->watchthis = true;
1040                 }
1041                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1042                         $this->minoredit = true;
1043                 }
1044                 if ( $this->textbox1 === false ) {
1045                         return false;
1046                 }
1047                 return true;
1048         }
1049
1050         /**
1051          * @param Content|null $def_content The default value to return
1052          *
1053          * @return Content|null Content on success, $def_content for invalid sections
1054          *
1055          * @since 1.21
1056          */
1057         protected function getContentObject( $def_content = null ) {
1058                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
1059
1060                 $content = false;
1061
1062                 // For message page not locally set, use the i18n message.
1063                 // For other non-existent articles, use preload text if any.
1064                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1065                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1066                                 # If this is a system message, get the default text.
1067                                 $msg = $this->mTitle->getDefaultMessageText();
1068
1069                                 $content = $this->toEditContent( $msg );
1070                         }
1071                         if ( $content === false ) {
1072                                 # If requested, preload some text.
1073                                 $preload = $wgRequest->getVal( 'preload',
1074                                         // Custom preload text for new sections
1075                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1076                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1077
1078                                 $content = $this->getPreloadedContent( $preload, $params );
1079                         }
1080                 // For existing pages, get text based on "undo" or section parameters.
1081                 } else {
1082                         if ( $this->section != '' ) {
1083                                 // Get section edit text (returns $def_text for invalid sections)
1084                                 $orig = $this->getOriginalContent( $wgUser );
1085                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1086
1087                                 if ( !$content ) {
1088                                         $content = $def_content;
1089                                 }
1090                         } else {
1091                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1092                                 $undo = $wgRequest->getInt( 'undo' );
1093
1094                                 if ( $undo > 0 && $undoafter > 0 ) {
1095                                         $undorev = Revision::newFromId( $undo );
1096                                         $oldrev = Revision::newFromId( $undoafter );
1097
1098                                         # Sanity check, make sure it's the right page,
1099                                         # the revisions exist and they were not deleted.
1100                                         # Otherwise, $content will be left as-is.
1101                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1102                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1103                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT )
1104                                         ) {
1105                                                 $content = $this->page->getUndoContent( $undorev, $oldrev );
1106
1107                                                 if ( $content === false ) {
1108                                                         # Warn the user that something went wrong
1109                                                         $undoMsg = 'failure';
1110                                                 } else {
1111                                                         $oldContent = $this->page->getContent( Revision::RAW );
1112                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1113                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1114
1115                                                         if ( $newContent->equals( $oldContent ) ) {
1116                                                                 # Tell the user that the undo results in no change,
1117                                                                 # i.e. the revisions were already undone.
1118                                                                 $undoMsg = 'nochange';
1119                                                                 $content = false;
1120                                                         } else {
1121                                                                 # Inform the user of our success and set an automatic edit summary
1122                                                                 $undoMsg = 'success';
1123
1124                                                                 # If we just undid one rev, use an autosummary
1125                                                                 $firstrev = $oldrev->getNext();
1126                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1127                                                                         $userText = $undorev->getUserText();
1128                                                                         if ( $userText === '' ) {
1129                                                                                 $undoSummary = wfMessage(
1130                                                                                         'undo-summary-username-hidden',
1131                                                                                         $undo
1132                                                                                 )->inContentLanguage()->text();
1133                                                                         } else {
1134                                                                                 $undoSummary = wfMessage(
1135                                                                                         'undo-summary',
1136                                                                                         $undo,
1137                                                                                         $userText
1138                                                                                 )->inContentLanguage()->text();
1139                                                                         }
1140                                                                         if ( $this->summary === '' ) {
1141                                                                                 $this->summary = $undoSummary;
1142                                                                         } else {
1143                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1144                                                                                         ->inContentLanguage()->text() . $this->summary;
1145                                                                         }
1146                                                                         $this->undidRev = $undo;
1147                                                                 }
1148                                                                 $this->formtype = 'diff';
1149                                                         }
1150                                                 }
1151                                         } else {
1152                                                 // Failed basic sanity checks.
1153                                                 // Older revisions may have been removed since the link
1154                                                 // was created, or we may simply have got bogus input.
1155                                                 $undoMsg = 'norev';
1156                                         }
1157
1158                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1159                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1160                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1161                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1162                                 }
1163
1164                                 if ( $content === false ) {
1165                                         $content = $this->getOriginalContent( $wgUser );
1166                                 }
1167                         }
1168                 }
1169
1170                 return $content;
1171         }
1172
1173         /**
1174          * Get the content of the wanted revision, without section extraction.
1175          *
1176          * The result of this function can be used to compare user's input with
1177          * section replaced in its context (using WikiPage::replaceSection())
1178          * to the original text of the edit.
1179          *
1180          * This differs from Article::getContent() that when a missing revision is
1181          * encountered the result will be null and not the
1182          * 'missing-revision' message.
1183          *
1184          * @since 1.19
1185          * @param User $user The user to get the revision for
1186          * @return Content|null
1187          */
1188         private function getOriginalContent( User $user ) {
1189                 if ( $this->section == 'new' ) {
1190                         return $this->getCurrentContent();
1191                 }
1192                 $revision = $this->mArticle->getRevisionFetched();
1193                 if ( $revision === null ) {
1194                         if ( !$this->contentModel ) {
1195                                 $this->contentModel = $this->getTitle()->getContentModel();
1196                         }
1197                         $handler = ContentHandler::getForModelID( $this->contentModel );
1198
1199                         return $handler->makeEmptyContent();
1200                 }
1201                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1202                 return $content;
1203         }
1204
1205         /**
1206          * Get the current content of the page. This is basically similar to
1207          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1208          * content object is returned instead of null.
1209          *
1210          * @since 1.21
1211          * @return Content
1212          */
1213         protected function getCurrentContent() {
1214                 $rev = $this->page->getRevision();
1215                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1216
1217                 if ( $content === false || $content === null ) {
1218                         if ( !$this->contentModel ) {
1219                                 $this->contentModel = $this->getTitle()->getContentModel();
1220                         }
1221                         $handler = ContentHandler::getForModelID( $this->contentModel );
1222
1223                         return $handler->makeEmptyContent();
1224                 } else {
1225                         # nasty side-effect, but needed for consistency
1226                         $this->contentModel = $rev->getContentModel();
1227                         $this->contentFormat = $rev->getContentFormat();
1228
1229                         return $content;
1230                 }
1231         }
1232
1233         /**
1234          * Use this method before edit() to preload some content into the edit box
1235          *
1236          * @param Content $content
1237          *
1238          * @since 1.21
1239          */
1240         public function setPreloadedContent( Content $content ) {
1241                 $this->mPreloadContent = $content;
1242         }
1243
1244         /**
1245          * Get the contents to be preloaded into the box, either set by
1246          * an earlier setPreloadText() or by loading the given page.
1247          *
1248          * @param string $preload Representing the title to preload from.
1249          * @param array $params Parameters to use (interface-message style) in the preloaded text
1250          *
1251          * @return Content
1252          *
1253          * @since 1.21
1254          */
1255         protected function getPreloadedContent( $preload, $params = array() ) {
1256                 global $wgUser;
1257
1258                 if ( !empty( $this->mPreloadContent ) ) {
1259                         return $this->mPreloadContent;
1260                 }
1261
1262                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1263
1264                 if ( $preload === '' ) {
1265                         return $handler->makeEmptyContent();
1266                 }
1267
1268                 $title = Title::newFromText( $preload );
1269                 # Check for existence to avoid getting MediaWiki:Noarticletext
1270                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1271                         // TODO: somehow show a warning to the user!
1272                         return $handler->makeEmptyContent();
1273                 }
1274
1275                 $page = WikiPage::factory( $title );
1276                 if ( $page->isRedirect() ) {
1277                         $title = $page->getRedirectTarget();
1278                         # Same as before
1279                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1280                                 // TODO: somehow show a warning to the user!
1281                                 return $handler->makeEmptyContent();
1282                         }
1283                         $page = WikiPage::factory( $title );
1284                 }
1285
1286                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1287                 $content = $page->getContent( Revision::RAW );
1288
1289                 if ( !$content ) {
1290                         // TODO: somehow show a warning to the user!
1291                         return $handler->makeEmptyContent();
1292                 }
1293
1294                 if ( $content->getModel() !== $handler->getModelID() ) {
1295                         $converted = $content->convert( $handler->getModelID() );
1296
1297                         if ( !$converted ) {
1298                                 // TODO: somehow show a warning to the user!
1299                                 wfDebug( "Attempt to preload incompatible content: " .
1300                                         "can't convert " . $content->getModel() .
1301                                         " to " . $handler->getModelID() );
1302
1303                                 return $handler->makeEmptyContent();
1304                         }
1305
1306                         $content = $converted;
1307                 }
1308
1309                 return $content->preloadTransform( $title, $parserOptions, $params );
1310         }
1311
1312         /**
1313          * Make sure the form isn't faking a user's credentials.
1314          *
1315          * @param WebRequest $request
1316          * @return bool
1317          * @private
1318          */
1319         function tokenOk( &$request ) {
1320                 global $wgUser;
1321                 $token = $request->getVal( 'wpEditToken' );
1322                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1323                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1324                 return $this->mTokenOk;
1325         }
1326
1327         /**
1328          * Sets post-edit cookie indicating the user just saved a particular revision.
1329          *
1330          * This uses a temporary cookie for each revision ID so separate saves will never
1331          * interfere with each other.
1332          *
1333          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1334          * the redirect.  It must be clearable by JavaScript code, so it must not be
1335          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1336          * variable.
1337          *
1338          * If the variable were set on the server, it would be cached, which is unwanted
1339          * since the post-edit state should only apply to the load right after the save.
1340          *
1341          * @param int $statusValue The status value (to check for new article status)
1342          */
1343         protected function setPostEditCookie( $statusValue ) {
1344                 $revisionId = $this->page->getLatest();
1345                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1346
1347                 $val = 'saved';
1348                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1349                         $val = 'created';
1350                 } elseif ( $this->oldid ) {
1351                         $val = 'restored';
1352                 }
1353
1354                 $response = RequestContext::getMain()->getRequest()->response();
1355                 $response->setCookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1356                         'httpOnly' => false,
1357                 ) );
1358         }
1359
1360         /**
1361          * Attempt submission
1362          * @param array $resultDetails See docs for $result in internalAttemptSave
1363          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1364          * @return Status The resulting status object.
1365          */
1366         public function attemptSave( &$resultDetails = false ) {
1367                 global $wgUser;
1368
1369                 # Allow bots to exempt some edits from bot flagging
1370                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1371                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1372
1373                 Hooks::run( 'EditPage::attemptSave:after', array( $this, $status, $resultDetails ) );
1374
1375                 return $status;
1376         }
1377
1378         /**
1379          * Handle status, such as after attempt save
1380          *
1381          * @param Status $status
1382          * @param array|bool $resultDetails
1383          *
1384          * @throws ErrorPageError
1385          * @return bool False, if output is done, true if rest of the form should be displayed
1386          */
1387         private function handleStatus( Status $status, $resultDetails ) {
1388                 global $wgUser, $wgOut;
1389
1390                 /**
1391                  * @todo FIXME: once the interface for internalAttemptSave() is made
1392                  *   nicer, this should use the message in $status
1393                  */
1394                 if ( $status->value == self::AS_SUCCESS_UPDATE
1395                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1396                 ) {
1397                         $this->didSave = true;
1398                         if ( !$resultDetails['nullEdit'] ) {
1399                                 $this->setPostEditCookie( $status->value );
1400                         }
1401                 }
1402
1403                 switch ( $status->value ) {
1404                         case self::AS_HOOK_ERROR_EXPECTED:
1405                         case self::AS_CONTENT_TOO_BIG:
1406                         case self::AS_ARTICLE_WAS_DELETED:
1407                         case self::AS_CONFLICT_DETECTED:
1408                         case self::AS_SUMMARY_NEEDED:
1409                         case self::AS_TEXTBOX_EMPTY:
1410                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1411                         case self::AS_END:
1412                         case self::AS_BLANK_ARTICLE:
1413                         case self::AS_SELF_REDIRECT:
1414                                 return true;
1415
1416                         case self::AS_HOOK_ERROR:
1417                                 return false;
1418
1419                         case self::AS_CANNOT_USE_CUSTOM_MODEL:
1420                         case self::AS_PARSE_ERROR:
1421                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1422                                 return true;
1423
1424                         case self::AS_SUCCESS_NEW_ARTICLE:
1425                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1426                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1427                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1428                                 return false;
1429
1430                         case self::AS_SUCCESS_UPDATE:
1431                                 $extraQuery = '';
1432                                 $sectionanchor = $resultDetails['sectionanchor'];
1433
1434                                 // Give extensions a chance to modify URL query on update
1435                                 Hooks::run(
1436                                         'ArticleUpdateBeforeRedirect',
1437                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1438                                 );
1439
1440                                 if ( $resultDetails['redirect'] ) {
1441                                         if ( $extraQuery == '' ) {
1442                                                 $extraQuery = 'redirect=no';
1443                                         } else {
1444                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1445                                         }
1446                                 }
1447                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1448                                 return false;
1449
1450                         case self::AS_SPAM_ERROR:
1451                                 $this->spamPageWithContent( $resultDetails['spam'] );
1452                                 return false;
1453
1454                         case self::AS_BLOCKED_PAGE_FOR_USER:
1455                                 throw new UserBlockedError( $wgUser->getBlock() );
1456
1457                         case self::AS_IMAGE_REDIRECT_ANON:
1458                         case self::AS_IMAGE_REDIRECT_LOGGED:
1459                                 throw new PermissionsError( 'upload' );
1460
1461                         case self::AS_READ_ONLY_PAGE_ANON:
1462                         case self::AS_READ_ONLY_PAGE_LOGGED:
1463                                 throw new PermissionsError( 'edit' );
1464
1465                         case self::AS_READ_ONLY_PAGE:
1466                                 throw new ReadOnlyError;
1467
1468                         case self::AS_RATE_LIMITED:
1469                                 throw new ThrottledError();
1470
1471                         case self::AS_NO_CREATE_PERMISSION:
1472                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1473                                 throw new PermissionsError( $permission );
1474
1475                         case self::AS_NO_CHANGE_CONTENT_MODEL:
1476                                 throw new PermissionsError( 'editcontentmodel' );
1477
1478                         default:
1479                                 // We don't recognize $status->value. The only way that can happen
1480                                 // is if an extension hook aborted from inside ArticleSave.
1481                                 // Render the status object into $this->hookError
1482                                 // FIXME this sucks, we should just use the Status object throughout
1483                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1484                                         '</div>';
1485                                 return true;
1486                 }
1487         }
1488
1489         /**
1490          * Run hooks that can filter edits just before they get saved.
1491          *
1492          * @param Content $content The Content to filter.
1493          * @param Status $status For reporting the outcome to the caller
1494          * @param User $user The user performing the edit
1495          *
1496          * @return bool
1497          */
1498         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1499                 // Run old style post-section-merge edit filter
1500                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1501                         array( $this, $content, &$this->hookError, $this->summary ) )
1502                 ) {
1503                         # Error messages etc. could be handled within the hook...
1504                         $status->fatal( 'hookaborted' );
1505                         $status->value = self::AS_HOOK_ERROR;
1506                         return false;
1507                 } elseif ( $this->hookError != '' ) {
1508                         # ...or the hook could be expecting us to produce an error
1509                         $status->fatal( 'hookaborted' );
1510                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1511                         return false;
1512                 }
1513
1514                 // Run new style post-section-merge edit filter
1515                 if ( !Hooks::run( 'EditFilterMergedContent',
1516                                 array( $this->mArticle->getContext(), $content, $status, $this->summary,
1517                                 $user, $this->minoredit ) )
1518                 ) {
1519                         # Error messages etc. could be handled within the hook...
1520                         if ( $status->isGood() ) {
1521                                 $status->fatal( 'hookaborted' );
1522                                 // Not setting $this->hookError here is a hack to allow the hook
1523                                 // to cause a return to the edit page without $this->hookError
1524                                 // being set. This is used by ConfirmEdit to display a captcha
1525                                 // without any error message cruft.
1526                         } else {
1527                                 $this->hookError = $status->getWikiText();
1528                         }
1529                         // Use the existing $status->value if the hook set it
1530                         if ( !$status->value ) {
1531                                 $status->value = self::AS_HOOK_ERROR;
1532                         }
1533                         return false;
1534                 } elseif ( !$status->isOK() ) {
1535                         # ...or the hook could be expecting us to produce an error
1536                         // FIXME this sucks, we should just use the Status object throughout
1537                         $this->hookError = $status->getWikiText();
1538                         $status->fatal( 'hookaborted' );
1539                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1540                         return false;
1541                 }
1542
1543                 return true;
1544         }
1545
1546         /**
1547          * Return the summary to be used for a new section.
1548          *
1549          * @param string $sectionanchor Set to the section anchor text
1550          * @return string
1551          */
1552         private function newSectionSummary( &$sectionanchor = null ) {
1553                 global $wgParser;
1554
1555                 if ( $this->sectiontitle !== '' ) {
1556                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1557                         // If no edit summary was specified, create one automatically from the section
1558                         // title and have it link to the new section. Otherwise, respect the summary as
1559                         // passed.
1560                         if ( $this->summary === '' ) {
1561                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1562                                 return wfMessage( 'newsectionsummary' )
1563                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1564                         }
1565                 } elseif ( $this->summary !== '' ) {
1566                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1567                         # This is a new section, so create a link to the new section
1568                         # in the revision summary.
1569                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1570                         return wfMessage( 'newsectionsummary' )
1571                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1572                 }
1573                 return $this->summary;
1574         }
1575
1576         /**
1577          * Attempt submission (no UI)
1578          *
1579          * @param array $result Array to add statuses to, currently with the
1580          *   possible keys:
1581          *   - spam (string): Spam string from content if any spam is detected by
1582          *     matchSpamRegex.
1583          *   - sectionanchor (string): Section anchor for a section save.
1584          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1585          *     false otherwise.
1586          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1587          *     revision is a redirect.
1588          * @param bool $bot True if edit is being made under the bot right.
1589          *
1590          * @return Status Status object, possibly with a message, but always with
1591          *   one of the AS_* constants in $status->value,
1592          *
1593          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1594          *   various error display idiosyncrasies. There are also lots of cases
1595          *   where error metadata is set in the object and retrieved later instead
1596          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1597          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1598          * time.
1599          */
1600         function internalAttemptSave( &$result, $bot = false ) {
1601                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1602                 global $wgContentHandlerUseDB;
1603
1604                 $status = Status::newGood();
1605
1606                 if ( !Hooks::run( 'EditPage::attemptSave', array( $this ) ) ) {
1607                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1608                         $status->fatal( 'hookaborted' );
1609                         $status->value = self::AS_HOOK_ERROR;
1610                         return $status;
1611                 }
1612
1613                 $spam = $wgRequest->getText( 'wpAntispam' );
1614                 if ( $spam !== '' ) {
1615                         wfDebugLog(
1616                                 'SimpleAntiSpam',
1617                                 $wgUser->getName() .
1618                                 ' editing "' .
1619                                 $this->mTitle->getPrefixedText() .
1620                                 '" submitted bogus field "' .
1621                                 $spam .
1622                                 '"'
1623                         );
1624                         $status->fatal( 'spamprotectionmatch', false );
1625                         $status->value = self::AS_SPAM_ERROR;
1626                         return $status;
1627                 }
1628
1629                 try {
1630                         # Construct Content object
1631                         $textbox_content = $this->toEditContent( $this->textbox1 );
1632                 } catch ( MWContentSerializationException $ex ) {
1633                         $status->fatal(
1634                                 'content-failed-to-parse',
1635                                 $this->contentModel,
1636                                 $this->contentFormat,
1637                                 $ex->getMessage()
1638                         );
1639                         $status->value = self::AS_PARSE_ERROR;
1640                         return $status;
1641                 }
1642
1643                 # Check image redirect
1644                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1645                         $textbox_content->isRedirect() &&
1646                         !$wgUser->isAllowed( 'upload' )
1647                 ) {
1648                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1649                                 $status->setResult( false, $code );
1650
1651                                 return $status;
1652                 }
1653
1654                 # Check for spam
1655                 $match = self::matchSummarySpamRegex( $this->summary );
1656                 if ( $match === false && $this->section == 'new' ) {
1657                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1658                         # regular summaries, it is added to the actual wikitext.
1659                         if ( $this->sectiontitle !== '' ) {
1660                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1661                                 $match = self::matchSpamRegex( $this->sectiontitle );
1662                         } else {
1663                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1664                                 # is used with the 'summary' parameter.
1665                                 $match = self::matchSpamRegex( $this->summary );
1666                         }
1667                 }
1668                 if ( $match === false ) {
1669                         $match = self::matchSpamRegex( $this->textbox1 );
1670                 }
1671                 if ( $match !== false ) {
1672                         $result['spam'] = $match;
1673                         $ip = $wgRequest->getIP();
1674                         $pdbk = $this->mTitle->getPrefixedDBkey();
1675                         $match = str_replace( "\n", '', $match );
1676                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1677                         $status->fatal( 'spamprotectionmatch', $match );
1678                         $status->value = self::AS_SPAM_ERROR;
1679                         return $status;
1680                 }
1681                 if ( !Hooks::run(
1682                         'EditFilter',
1683                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1684                 ) {
1685                         # Error messages etc. could be handled within the hook...
1686                         $status->fatal( 'hookaborted' );
1687                         $status->value = self::AS_HOOK_ERROR;
1688                         return $status;
1689                 } elseif ( $this->hookError != '' ) {
1690                         # ...or the hook could be expecting us to produce an error
1691                         $status->fatal( 'hookaborted' );
1692                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1693                         return $status;
1694                 }
1695
1696                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1697                         // Auto-block user's IP if the account was "hard" blocked
1698                         $wgUser->spreadAnyEditBlock();
1699                         # Check block state against master, thus 'false'.
1700                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1701                         return $status;
1702                 }
1703
1704                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1705                 if ( $this->kblength > $wgMaxArticleSize ) {
1706                         // Error will be displayed by showEditForm()
1707                         $this->tooBig = true;
1708                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1709                         return $status;
1710                 }
1711
1712                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1713                         if ( $wgUser->isAnon() ) {
1714                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1715                                 return $status;
1716                         } else {
1717                                 $status->fatal( 'readonlytext' );
1718                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1719                                 return $status;
1720                         }
1721                 }
1722
1723                 $changingContentModel = false;
1724                 if ( $this->contentModel !== $this->mTitle->getContentModel() ) {
1725                         if ( !$wgContentHandlerUseDB ) {
1726                                 $status->fatal( 'editpage-cannot-use-custom-model' );
1727                                 $status->value = self::AS_CANNOT_USE_CUSTOM_MODEL;
1728                                 return $status;
1729                         } elseif ( !$wgUser->isAllowed( 'editcontentmodel' ) ) {
1730                                 $status->setResult( false, self::AS_NO_CHANGE_CONTENT_MODEL );
1731                                 return $status;
1732
1733                         }
1734                         $changingContentModel = true;
1735                         $oldContentModel = $this->mTitle->getContentModel();
1736                 }
1737
1738                 if ( $this->changeTags ) {
1739                         $changeTagsStatus = ChangeTags::canAddTagsAccompanyingChange(
1740                                 $this->changeTags, $wgUser );
1741                         if ( !$changeTagsStatus->isOK() ) {
1742                                 $changeTagsStatus->value = self::AS_CHANGE_TAG_ERROR;
1743                                 return $changeTagsStatus;
1744                         }
1745                 }
1746
1747                 if ( wfReadOnly() ) {
1748                         $status->fatal( 'readonlytext' );
1749                         $status->value = self::AS_READ_ONLY_PAGE;
1750                         return $status;
1751                 }
1752                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1753                         $status->fatal( 'actionthrottledtext' );
1754                         $status->value = self::AS_RATE_LIMITED;
1755                         return $status;
1756                 }
1757
1758                 # If the article has been deleted while editing, don't save it without
1759                 # confirmation
1760                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1761                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1762                         return $status;
1763                 }
1764
1765                 # Load the page data from the master. If anything changes in the meantime,
1766                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1767                 $this->page->loadPageData( 'fromdbmaster' );
1768                 $new = !$this->page->exists();
1769
1770                 if ( $new ) {
1771                         // Late check for create permission, just in case *PARANOIA*
1772                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1773                                 $status->fatal( 'nocreatetext' );
1774                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1775                                 wfDebug( __METHOD__ . ": no create permission\n" );
1776                                 return $status;
1777                         }
1778
1779                         // Don't save a new page if it's blank or if it's a MediaWiki:
1780                         // message with content equivalent to default (allow empty pages
1781                         // in this case to disable messages, see bug 50124)
1782                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1783                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1784                                 $defaultText = $defaultMessageText;
1785                         } else {
1786                                 $defaultText = '';
1787                         }
1788
1789                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1790                                 $this->blankArticle = true;
1791                                 $status->fatal( 'blankarticle' );
1792                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1793                                 return $status;
1794                         }
1795
1796                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1797                                 return $status;
1798                         }
1799
1800                         $content = $textbox_content;
1801
1802                         $result['sectionanchor'] = '';
1803                         if ( $this->section == 'new' ) {
1804                                 if ( $this->sectiontitle !== '' ) {
1805                                         // Insert the section title above the content.
1806                                         $content = $content->addSectionHeader( $this->sectiontitle );
1807                                 } elseif ( $this->summary !== '' ) {
1808                                         // Insert the section title above the content.
1809                                         $content = $content->addSectionHeader( $this->summary );
1810                                 }
1811                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1812                         }
1813
1814                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1815
1816                 } else { # not $new
1817
1818                         # Article exists. Check for edit conflict.
1819
1820                         $this->page->clear(); # Force reload of dates, etc.
1821                         $timestamp = $this->page->getTimestamp();
1822
1823                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1824
1825                         if ( $timestamp != $this->edittime ) {
1826                                 $this->isConflict = true;
1827                                 if ( $this->section == 'new' ) {
1828                                         if ( $this->page->getUserText() == $wgUser->getName() &&
1829                                                 $this->page->getComment() == $this->newSectionSummary()
1830                                         ) {
1831                                                 // Probably a duplicate submission of a new comment.
1832                                                 // This can happen when squid resends a request after
1833                                                 // a timeout but the first one actually went through.
1834                                                 wfDebug( __METHOD__
1835                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1836                                         } else {
1837                                                 // New comment; suppress conflict.
1838                                                 $this->isConflict = false;
1839                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1840                                         }
1841                                 } elseif ( $this->section == ''
1842                                         && Revision::userWasLastToEdit(
1843                                                 DB_MASTER, $this->mTitle->getArticleID(),
1844                                                 $wgUser->getId(), $this->edittime
1845                                         )
1846                                 ) {
1847                                         # Suppress edit conflict with self, except for section edits where merging is required.
1848                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1849                                         $this->isConflict = false;
1850                                 }
1851                         }
1852
1853                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1854                         if ( $this->sectiontitle !== '' ) {
1855                                 $sectionTitle = $this->sectiontitle;
1856                         } else {
1857                                 $sectionTitle = $this->summary;
1858                         }
1859
1860                         $content = null;
1861
1862                         if ( $this->isConflict ) {
1863                                 wfDebug( __METHOD__
1864                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1865                                         . " (article time '{$timestamp}')\n" );
1866
1867                                 $content = $this->page->replaceSectionContent(
1868                                         $this->section,
1869                                         $textbox_content,
1870                                         $sectionTitle,
1871                                         $this->edittime
1872                                 );
1873                         } else {
1874                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1875                                 $content = $this->page->replaceSectionContent(
1876                                         $this->section,
1877                                         $textbox_content,
1878                                         $sectionTitle
1879                                 );
1880                         }
1881
1882                         if ( is_null( $content ) ) {
1883                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1884                                 $this->isConflict = true;
1885                                 $content = $textbox_content; // do not try to merge here!
1886                         } elseif ( $this->isConflict ) {
1887                                 # Attempt merge
1888                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1889                                         // Successful merge! Maybe we should tell the user the good news?
1890                                         $this->isConflict = false;
1891                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1892                                 } else {
1893                                         $this->section = '';
1894                                         $this->textbox1 = ContentHandler::getContentText( $content );
1895                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1896                                 }
1897                         }
1898
1899                         if ( $this->isConflict ) {
1900                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1901                                 return $status;
1902                         }
1903
1904                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1905                                 return $status;
1906                         }
1907
1908                         if ( $this->section == 'new' ) {
1909                                 // Handle the user preference to force summaries here
1910                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1911                                         $this->missingSummary = true;
1912                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1913                                         $status->value = self::AS_SUMMARY_NEEDED;
1914                                         return $status;
1915                                 }
1916
1917                                 // Do not allow the user to post an empty comment
1918                                 if ( $this->textbox1 == '' ) {
1919                                         $this->missingComment = true;
1920                                         $status->fatal( 'missingcommenttext' );
1921                                         $status->value = self::AS_TEXTBOX_EMPTY;
1922                                         return $status;
1923                                 }
1924                         } elseif ( !$this->allowBlankSummary
1925                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1926                                 && !$content->isRedirect()
1927                                 && md5( $this->summary ) == $this->autoSumm
1928                         ) {
1929                                 $this->missingSummary = true;
1930                                 $status->fatal( 'missingsummary' );
1931                                 $status->value = self::AS_SUMMARY_NEEDED;
1932                                 return $status;
1933                         }
1934
1935                         # All's well
1936                         $sectionanchor = '';
1937                         if ( $this->section == 'new' ) {
1938                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1939                         } elseif ( $this->section != '' ) {
1940                                 # Try to get a section anchor from the section source, redirect
1941                                 # to edited section if header found.
1942                                 # XXX: Might be better to integrate this into Article::replaceSection
1943                                 # for duplicate heading checking and maybe parsing.
1944                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1945                                 # We can't deal with anchors, includes, html etc in the header for now,
1946                                 # headline would need to be parsed to improve this.
1947                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1948                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1949                                 }
1950                         }
1951                         $result['sectionanchor'] = $sectionanchor;
1952
1953                         // Save errors may fall down to the edit form, but we've now
1954                         // merged the section into full text. Clear the section field
1955                         // so that later submission of conflict forms won't try to
1956                         // replace that into a duplicated mess.
1957                         $this->textbox1 = $this->toEditText( $content );
1958                         $this->section = '';
1959
1960                         $status->value = self::AS_SUCCESS_UPDATE;
1961                 }
1962
1963                 if ( !$this->allowSelfRedirect
1964                         && $content->isRedirect()
1965                         && $content->getRedirectTarget()->equals( $this->getTitle() )
1966                 ) {
1967                         // If the page already redirects to itself, don't warn.
1968                         $currentTarget = $this->getCurrentContent()->getRedirectTarget();
1969                         if ( !$currentTarget || !$currentTarget->equals( $this->getTitle() ) ) {
1970                                 $this->selfRedirect = true;
1971                                 $status->fatal( 'selfredirect' );
1972                                 $status->value = self::AS_SELF_REDIRECT;
1973                                 return $status;
1974                         }
1975                 }
1976
1977                 // Check for length errors again now that the section is merged in
1978                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1979                 if ( $this->kblength > $wgMaxArticleSize ) {
1980                         $this->tooBig = true;
1981                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1982                         return $status;
1983                 }
1984
1985                 $flags = EDIT_AUTOSUMMARY |
1986                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1987                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1988                         ( $bot ? EDIT_FORCE_BOT : 0 );
1989
1990                 $doEditStatus = $this->page->doEditContent(
1991                         $content,
1992                         $this->summary,
1993                         $flags,
1994                         false,
1995                         $wgUser,
1996                         $content->getDefaultFormat()
1997                 );
1998
1999                 if ( !$doEditStatus->isOK() ) {
2000                         // Failure from doEdit()
2001                         // Show the edit conflict page for certain recognized errors from doEdit(),
2002                         // but don't show it for errors from extension hooks
2003                         $errors = $doEditStatus->getErrorsArray();
2004                         if ( in_array( $errors[0][0],
2005                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
2006                         ) {
2007                                 $this->isConflict = true;
2008                                 // Destroys data doEdit() put in $status->value but who cares
2009                                 $doEditStatus->value = self::AS_END;
2010                         }
2011                         return $doEditStatus;
2012                 }
2013
2014                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
2015                 if ( $result['nullEdit'] ) {
2016                         // We don't know if it was a null edit until now, so increment here
2017                         $wgUser->pingLimiter( 'linkpurge' );
2018                 }
2019                 $result['redirect'] = $content->isRedirect();
2020
2021                 $this->updateWatchlist();
2022
2023                 if ( $this->changeTags && isset( $doEditStatus->value['revision'] ) ) {
2024                         // If a revision was created, apply any change tags that were requested
2025                         $addTags = $this->changeTags;
2026                         $revId = $doEditStatus->value['revision']->getId();
2027                         // Defer this both for performance and so that addTags() sees the rc_id
2028                         // since the recentchange entry addition is deferred first (bug T100248)
2029                         DeferredUpdates::addCallableUpdate( function() use ( $addTags, $revId ) {
2030                                 ChangeTags::addTags( $addTags, null, $revId );
2031                         } );
2032                 }
2033
2034                 // If the content model changed, add a log entry
2035                 if ( $changingContentModel ) {
2036                         $this->addContentModelChangeLogEntry(
2037                                 $wgUser,
2038                                 $oldContentModel,
2039                                 $this->contentModel,
2040                                 $this->summary
2041                         );
2042                 }
2043
2044                 return $status;
2045         }
2046
2047         /**
2048          * @param User $user
2049          * @param string $oldModel
2050          * @param string $newModel
2051          * @param string $reason
2052          */
2053         protected function addContentModelChangeLogEntry( User $user, $oldModel, $newModel, $reason ) {
2054                 $log = new ManualLogEntry( 'contentmodel', 'change' );
2055                 $log->setPerformer( $user );
2056                 $log->setTarget( $this->mTitle );
2057                 $log->setComment( $reason );
2058                 $log->setParameters( array(
2059                         '4::oldmodel' => $oldModel,
2060                         '5::newmodel' => $newModel
2061                 ) );
2062                 $logid = $log->insert();
2063                 $log->publish( $logid );
2064         }
2065
2066         /**
2067          * Register the change of watch status
2068          */
2069         protected function updateWatchlist() {
2070                 global $wgUser;
2071
2072                 if ( !$wgUser->isLoggedIn() ) {
2073                         return;
2074                 }
2075
2076                 $user = $wgUser;
2077                 $title = $this->mTitle;
2078                 $watch = $this->watchthis;
2079                 // Do this in its own transaction to reduce contention...
2080                 DeferredUpdates::addCallableUpdate( function () use ( $user, $title, $watch ) {
2081                         if ( $watch == $user->isWatched( $title, WatchedItem::IGNORE_USER_RIGHTS ) ) {
2082                                 return; // nothing to change
2083                         }
2084                         WatchAction::doWatchOrUnwatch( $watch, $title, $user );
2085                 } );
2086         }
2087
2088         /**
2089          * Attempts to do 3-way merge of edit content with a base revision
2090          * and current content, in case of edit conflict, in whichever way appropriate
2091          * for the content type.
2092          *
2093          * @since 1.21
2094          *
2095          * @param Content $editContent
2096          *
2097          * @return bool
2098          */
2099         private function mergeChangesIntoContent( &$editContent ) {
2100
2101                 $db = wfGetDB( DB_MASTER );
2102
2103                 // This is the revision the editor started from
2104                 $baseRevision = $this->getBaseRevision();
2105                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2106
2107                 if ( is_null( $baseContent ) ) {
2108                         return false;
2109                 }
2110
2111                 // The current state, we want to merge updates into it
2112                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2113                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2114
2115                 if ( is_null( $currentContent ) ) {
2116                         return false;
2117                 }
2118
2119                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2120
2121                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2122
2123                 if ( $result ) {
2124                         $editContent = $result;
2125                         return true;
2126                 }
2127
2128                 return false;
2129         }
2130
2131         /**
2132          * @return Revision
2133          */
2134         function getBaseRevision() {
2135                 if ( !$this->mBaseRevision ) {
2136                         $db = wfGetDB( DB_MASTER );
2137                         $this->mBaseRevision = Revision::loadFromTimestamp(
2138                                 $db, $this->mTitle, $this->edittime );
2139                 }
2140                 return $this->mBaseRevision;
2141         }
2142
2143         /**
2144          * Check given input text against $wgSpamRegex, and return the text of the first match.
2145          *
2146          * @param string $text
2147          *
2148          * @return string|bool Matching string or false
2149          */
2150         public static function matchSpamRegex( $text ) {
2151                 global $wgSpamRegex;
2152                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2153                 $regexes = (array)$wgSpamRegex;
2154                 return self::matchSpamRegexInternal( $text, $regexes );
2155         }
2156
2157         /**
2158          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2159          *
2160          * @param string $text
2161          *
2162          * @return string|bool Matching string or false
2163          */
2164         public static function matchSummarySpamRegex( $text ) {
2165                 global $wgSummarySpamRegex;
2166                 $regexes = (array)$wgSummarySpamRegex;
2167                 return self::matchSpamRegexInternal( $text, $regexes );
2168         }
2169
2170         /**
2171          * @param string $text
2172          * @param array $regexes
2173          * @return bool|string
2174          */
2175         protected static function matchSpamRegexInternal( $text, $regexes ) {
2176                 foreach ( $regexes as $regex ) {
2177                         $matches = array();
2178                         if ( preg_match( $regex, $text, $matches ) ) {
2179                                 return $matches[0];
2180                         }
2181                 }
2182                 return false;
2183         }
2184
2185         function setHeaders() {
2186                 global $wgOut, $wgUser, $wgAjaxEditStash;
2187
2188                 $wgOut->addModules( 'mediawiki.action.edit' );
2189                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2190
2191                 if ( $wgUser->getOption( 'showtoolbar' ) ) {
2192                         // The addition of default buttons is handled by getEditToolbar() which
2193                         // has its own dependency on this module. The call here ensures the module
2194                         // is loaded in time (it has position "top") for other modules to register
2195                         // buttons (e.g. extensions, gadgets, user scripts).
2196                         $wgOut->addModules( 'mediawiki.toolbar' );
2197                 }
2198
2199                 if ( $wgUser->getOption( 'uselivepreview' ) ) {
2200                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2201                 }
2202
2203                 if ( $wgUser->getOption( 'useeditwarning' ) ) {
2204                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2205                 }
2206
2207                 if ( $wgAjaxEditStash ) {
2208                         $wgOut->addModules( 'mediawiki.action.edit.stash' );
2209                 }
2210
2211                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2212
2213                 # Enabled article-related sidebar, toplinks, etc.
2214                 $wgOut->setArticleRelated( true );
2215
2216                 $contextTitle = $this->getContextTitle();
2217                 if ( $this->isConflict ) {
2218                         $msg = 'editconflict';
2219                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2220                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2221                 } else {
2222                         $msg = $contextTitle->exists()
2223                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2224                                         && $contextTitle->getDefaultMessageText() !== false
2225                                 )
2226                                 ? 'editing'
2227                                 : 'creating';
2228                 }
2229
2230                 # Use the title defined by DISPLAYTITLE magic word when present
2231                 # NOTE: getDisplayTitle() returns HTML while getPrefixedText() returns plain text.
2232                 #       setPageTitle() treats the input as wikitext, which should be safe in either case.
2233                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2234                 if ( $displayTitle === false ) {
2235                         $displayTitle = $contextTitle->getPrefixedText();
2236                 }
2237                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2238                 # Transmit the name of the message to JavaScript for live preview
2239                 # Keep Resources.php/mediawiki.action.edit.preview in sync with the possible keys
2240                 $wgOut->addJsConfigVars( 'wgEditMessage', $msg );
2241         }
2242
2243         /**
2244          * Show all applicable editing introductions
2245          */
2246         protected function showIntro() {
2247                 global $wgOut, $wgUser;
2248                 if ( $this->suppressIntro ) {
2249                         return;
2250                 }
2251
2252                 $namespace = $this->mTitle->getNamespace();
2253
2254                 if ( $namespace == NS_MEDIAWIKI ) {
2255                         # Show a warning if editing an interface message
2256                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2257                         # If this is a default message (but not css or js),
2258                         # show a hint that it is translatable on translatewiki.net
2259                         if ( !$this->mTitle->hasContentModel( CONTENT_MODEL_CSS )
2260                                 && !$this->mTitle->hasContentModel( CONTENT_MODEL_JAVASCRIPT )
2261                         ) {
2262                                 $defaultMessageText = $this->mTitle->getDefaultMessageText();
2263                                 if ( $defaultMessageText !== false ) {
2264                                         $wgOut->wrapWikiMsg( "<div class='mw-translateinterface'>\n$1\n</div>",
2265                                                 'translateinterface' );
2266                                 }
2267                         }
2268                 } elseif ( $namespace == NS_FILE ) {
2269                         # Show a hint to shared repo
2270                         $file = wfFindFile( $this->mTitle );
2271                         if ( $file && !$file->isLocal() ) {
2272                                 $descUrl = $file->getDescriptionUrl();
2273                                 # there must be a description url to show a hint to shared repo
2274                                 if ( $descUrl ) {
2275                                         if ( !$this->mTitle->exists() ) {
2276                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2277                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2278                                                 ) );
2279                                         } else {
2280                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2281                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2282                                                 ) );
2283                                         }
2284                                 }
2285                         }
2286                 }
2287
2288                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2289                 # Show log extract when the user is currently blocked
2290                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2291                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2292                         $username = $parts[0];
2293                         $user = User::newFromName( $username, false /* allow IP users*/ );
2294                         $ip = User::isIP( $username );
2295                         $block = Block::newFromTarget( $user, $user );
2296                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2297                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2298                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2299                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
2300                                 # Show log extract if the user is currently blocked
2301                                 LogEventsList::showLogExtract(
2302                                         $wgOut,
2303                                         'block',
2304                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2305                                         '',
2306                                         array(
2307                                                 'lim' => 1,
2308                                                 'showIfEmpty' => false,
2309                                                 'msgKey' => array(
2310                                                         'blocked-notice-logextract',
2311                                                         $user->getName() # Support GENDER in notice
2312                                                 )
2313                                         )
2314                                 );
2315                         }
2316                 }
2317                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2318                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2319                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2320                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2321                         ) );
2322                         if ( $wgUser->isLoggedIn() ) {
2323                                 $wgOut->wrapWikiMsg(
2324                                         // Suppress the external link icon, consider the help url an internal one
2325                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2326                                         array(
2327                                                 'newarticletext',
2328                                                 $helpLink
2329                                         )
2330                                 );
2331                         } else {
2332                                 $wgOut->wrapWikiMsg(
2333                                         // Suppress the external link icon, consider the help url an internal one
2334                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2335                                         array(
2336                                                 'newarticletextanon',
2337                                                 $helpLink
2338                                         )
2339                                 );
2340                         }
2341                 }
2342                 # Give a notice if the user is editing a deleted/moved page...
2343                 if ( !$this->mTitle->exists() ) {
2344                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2345                                 '',
2346                                 array(
2347                                         'lim' => 10,
2348                                         'conds' => array( "log_action != 'revision'" ),
2349                                         'showIfEmpty' => false,
2350                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2351                                 )
2352                         );
2353                 }
2354         }
2355
2356         /**
2357          * Attempt to show a custom editing introduction, if supplied
2358          *
2359          * @return bool
2360          */
2361         protected function showCustomIntro() {
2362                 if ( $this->editintro ) {
2363                         $title = Title::newFromText( $this->editintro );
2364                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2365                                 global $wgOut;
2366                                 // Added using template syntax, to take <noinclude>'s into account.
2367                                 $wgOut->addWikiTextTitleTidy(
2368                                         '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>',
2369                                         $this->mTitle
2370                                 );
2371                                 return true;
2372                         }
2373                 }
2374                 return false;
2375         }
2376
2377         /**
2378          * Gets an editable textual representation of $content.
2379          * The textual representation can be turned by into a Content object by the
2380          * toEditContent() method.
2381          *
2382          * If $content is null or false or a string, $content is returned unchanged.
2383          *
2384          * If the given Content object is not of a type that can be edited using
2385          * the text base EditPage, an exception will be raised. Set
2386          * $this->allowNonTextContent to true to allow editing of non-textual
2387          * content.
2388          *
2389          * @param Content|null|bool|string $content
2390          * @return string The editable text form of the content.
2391          *
2392          * @throws MWException If $content is not an instance of TextContent and
2393          *   $this->allowNonTextContent is not true.
2394          */
2395         protected function toEditText( $content ) {
2396                 if ( $content === null || $content === false || is_string( $content ) ) {
2397                         return $content;
2398                 }
2399
2400                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2401                         throw new MWException( 'This content model is not supported: '
2402                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2403                 }
2404
2405                 return $content->serialize( $this->contentFormat );
2406         }
2407
2408         /**
2409          * Turns the given text into a Content object by unserializing it.
2410          *
2411          * If the resulting Content object is not of a type that can be edited using
2412          * the text base EditPage, an exception will be raised. Set
2413          * $this->allowNonTextContent to true to allow editing of non-textual
2414          * content.
2415          *
2416          * @param string|null|bool $text Text to unserialize
2417          * @return Content The content object created from $text. If $text was false
2418          *   or null, false resp. null will be  returned instead.
2419          *
2420          * @throws MWException If unserializing the text results in a Content
2421          *   object that is not an instance of TextContent and
2422          *   $this->allowNonTextContent is not true.
2423          */
2424         protected function toEditContent( $text ) {
2425                 if ( $text === false || $text === null ) {
2426                         return $text;
2427                 }
2428
2429                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2430                         $this->contentModel, $this->contentFormat );
2431
2432                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2433                         throw new MWException( 'This content model is not supported: '
2434                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2435                 }
2436
2437                 return $content;
2438         }
2439
2440         /**
2441          * Send the edit form and related headers to $wgOut
2442          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2443          *     during form output near the top, for captchas and the like.
2444          *
2445          * The $formCallback parameter is deprecated since MediaWiki 1.25. Please
2446          * use the EditPage::showEditForm:fields hook instead.
2447          */
2448         function showEditForm( $formCallback = null ) {
2449                 global $wgOut, $wgUser;
2450
2451                 # need to parse the preview early so that we know which templates are used,
2452                 # otherwise users with "show preview after edit box" will get a blank list
2453                 # we parse this near the beginning so that setHeaders can do the title
2454                 # setting work instead of leaving it in getPreviewText
2455                 $previewOutput = '';
2456                 if ( $this->formtype == 'preview' ) {
2457                         $previewOutput = $this->getPreviewText();
2458                 }
2459
2460                 Hooks::run( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2461
2462                 $this->setHeaders();
2463
2464                 if ( $this->showHeader() === false ) {
2465                         return;
2466                 }
2467
2468                 $wgOut->addHTML( $this->editFormPageTop );
2469
2470                 if ( $wgUser->getOption( 'previewontop' ) ) {
2471                         $this->displayPreviewArea( $previewOutput, true );
2472                 }
2473
2474                 $wgOut->addHTML( $this->editFormTextTop );
2475
2476                 $showToolbar = true;
2477                 if ( $this->wasDeletedSinceLastEdit() ) {
2478                         if ( $this->formtype == 'save' ) {
2479                                 // Hide the toolbar and edit area, user can click preview to get it back
2480                                 // Add an confirmation checkbox and explanation.
2481                                 $showToolbar = false;
2482                         } else {
2483                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2484                                         'deletedwhileediting' );
2485                         }
2486                 }
2487
2488                 // @todo add EditForm plugin interface and use it here!
2489                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2490                 $wgOut->addHTML( Html::openElement(
2491                         'form',
2492                         array(
2493                                 'id' => self::EDITFORM_ID,
2494                                 'name' => self::EDITFORM_ID,
2495                                 'method' => 'post',
2496                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2497                                 'enctype' => 'multipart/form-data'
2498                         )
2499                 ) );
2500
2501                 if ( is_callable( $formCallback ) ) {
2502                         wfWarn( 'The $formCallback parameter to ' . __METHOD__ . 'is deprecated' );
2503                         call_user_func_array( $formCallback, array( &$wgOut ) );
2504                 }
2505
2506                 // Add an empty field to trip up spambots
2507                 $wgOut->addHTML(
2508                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2509                         . Html::rawElement(
2510                                 'label',
2511                                 array( 'for' => 'wpAntiSpam' ),
2512                                 wfMessage( 'simpleantispam-label' )->parse()
2513                         )
2514                         . Xml::element(
2515                                 'input',
2516                                 array(
2517                                         'type' => 'text',
2518                                         'name' => 'wpAntispam',
2519                                         'id' => 'wpAntispam',
2520                                         'value' => ''
2521                                 )
2522                         )
2523                         . Xml::closeElement( 'div' )
2524                 );
2525
2526                 Hooks::run( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2527
2528                 // Put these up at the top to ensure they aren't lost on early form submission
2529                 $this->showFormBeforeText();
2530
2531                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2532                         $username = $this->lastDelete->user_name;
2533                         $comment = $this->lastDelete->log_comment;
2534
2535                         // It is better to not parse the comment at all than to have templates expanded in the middle
2536                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2537                         $key = $comment === ''
2538                                 ? 'confirmrecreate-noreason'
2539                                 : 'confirmrecreate';
2540                         $wgOut->addHTML(
2541                                 '<div class="mw-confirm-recreate">' .
2542                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2543                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2544                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2545                                 ) .
2546                                 '</div>'
2547                         );
2548                 }
2549
2550                 # When the summary is hidden, also hide them on preview/show changes
2551                 if ( $this->nosummary ) {
2552                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2553                 }
2554
2555                 # If a blank edit summary was previously provided, and the appropriate
2556                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2557                 # user being bounced back more than once in the event that a summary
2558                 # is not required.
2559                 # ####
2560                 # For a bit more sophisticated detection of blank summaries, hash the
2561                 # automatic one and pass that in the hidden field wpAutoSummary.
2562                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2563                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2564                 }
2565
2566                 if ( $this->undidRev ) {
2567                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2568                 }
2569
2570                 if ( $this->selfRedirect ) {
2571                         $wgOut->addHTML( Html::hidden( 'wpIgnoreSelfRedirect', true ) );
2572                 }
2573
2574                 if ( $this->hasPresetSummary ) {
2575                         // If a summary has been preset using &summary= we don't want to prompt for
2576                         // a different summary. Only prompt for a summary if the summary is blanked.
2577                         // (Bug 17416)
2578                         $this->autoSumm = md5( '' );
2579                 }
2580
2581                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2582                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2583
2584                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2585                 $wgOut->addHTML( Html::hidden( 'parentRevId',
2586                         $this->parentRevId ?: $this->mArticle->getRevIdFetched() ) );
2587
2588                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2589                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2590
2591                 if ( $this->section == 'new' ) {
2592                         $this->showSummaryInput( true, $this->summary );
2593                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2594                 }
2595
2596                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2597
2598                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2599                         $wgOut->addHTML( EditPage::getEditToolbar( $this->mTitle ) );
2600                 }
2601
2602                 if ( $this->blankArticle ) {
2603                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2604                 }
2605
2606                 if ( $this->isConflict ) {
2607                         // In an edit conflict bypass the overridable content form method
2608                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2609                         // resolved between page source edits and custom ui edits using the
2610                         // custom edit ui.
2611                         $this->textbox2 = $this->textbox1;
2612
2613                         $content = $this->getCurrentContent();
2614                         $this->textbox1 = $this->toEditText( $content );
2615
2616                         $this->showTextbox1();
2617                 } else {
2618                         $this->showContentForm();
2619                 }
2620
2621                 $wgOut->addHTML( $this->editFormTextAfterContent );
2622
2623                 $this->showStandardInputs();
2624
2625                 $this->showFormAfterText();
2626
2627                 $this->showTosSummary();
2628
2629                 $this->showEditTools();
2630
2631                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2632
2633                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2634                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2635
2636                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2637                         Linker::formatHiddenCategories( $this->page->getHiddenCategories() ) ) );
2638
2639                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2640                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2641
2642                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2643
2644                 if ( $this->isConflict ) {
2645                         try {
2646                                 $this->showConflict();
2647                         } catch ( MWContentSerializationException $ex ) {
2648                                 // this can't really happen, but be nice if it does.
2649                                 $msg = wfMessage(
2650                                         'content-failed-to-parse',
2651                                         $this->contentModel,
2652                                         $this->contentFormat,
2653                                         $ex->getMessage()
2654                                 );
2655                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2656                         }
2657                 }
2658
2659                 // Marker for detecting truncated form data.  This must be the last
2660                 // parameter sent in order to be of use, so do not move me.
2661                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2662                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2663
2664                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2665                         $this->displayPreviewArea( $previewOutput, false );
2666                 }
2667
2668         }
2669
2670         /**
2671          * Extract the section title from current section text, if any.
2672          *
2673          * @param string $text
2674          * @return string|bool String or false
2675          */
2676         public static function extractSectionTitle( $text ) {
2677                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2678                 if ( !empty( $matches[2] ) ) {
2679                         global $wgParser;
2680                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2681                 } else {
2682                         return false;
2683                 }
2684         }
2685
2686         /**
2687          * @return bool
2688          */
2689         protected function showHeader() {
2690                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2691                 global $wgAllowUserCss, $wgAllowUserJs;
2692
2693                 if ( $this->mTitle->isTalkPage() ) {
2694                         $wgOut->addWikiMsg( 'talkpagetext' );
2695                 }
2696
2697                 // Add edit notices
2698                 $editNotices = $this->mTitle->getEditNotices( $this->oldid );
2699                 if ( count( $editNotices ) ) {
2700                         $wgOut->addHTML( implode( "\n", $editNotices ) );
2701                 } else {
2702                         $msg = wfMessage( 'editnotice-notext' );
2703                         if ( !$msg->isDisabled() ) {
2704                                 $wgOut->addHTML(
2705                                         '<div class="mw-editnotice-notext">'
2706                                         . $msg->parseAsBlock()
2707                                         . '</div>'
2708                                 );
2709                         }
2710                 }
2711
2712                 if ( $this->isConflict ) {
2713                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2714                         $this->edittime = $this->page->getTimestamp();
2715                 } else {
2716                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2717                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2718                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2719                                 // Someone is welcome to try refactoring though
2720                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2721                                 return false;
2722                         }
2723
2724                         if ( $this->section != '' && $this->section != 'new' ) {
2725                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2726                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); // FIXME: use Content object
2727                                         if ( $sectionTitle !== false ) {
2728                                                 $this->summary = "/* $sectionTitle */ ";
2729                                         }
2730                                 }
2731                         }
2732
2733                         if ( $this->missingComment ) {
2734                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2735                         }
2736
2737                         if ( $this->missingSummary && $this->section != 'new' ) {
2738                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2739                         }
2740
2741                         if ( $this->missingSummary && $this->section == 'new' ) {
2742                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2743                         }
2744
2745                         if ( $this->blankArticle ) {
2746                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2747                         }
2748
2749                         if ( $this->selfRedirect ) {
2750                                 $wgOut->wrapWikiMsg( "<div id='mw-selfredirect'>\n$1\n</div>", 'selfredirect' );
2751                         }
2752
2753                         if ( $this->hookError !== '' ) {
2754                                 $wgOut->addWikiText( $this->hookError );
2755                         }
2756
2757                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2758                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2759                         }
2760
2761                         if ( $this->section != 'new' ) {
2762                                 $revision = $this->mArticle->getRevisionFetched();
2763                                 if ( $revision ) {
2764                                         // Let sysop know that this will make private content public if saved
2765
2766                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2767                                                 $wgOut->wrapWikiMsg(
2768                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2769                                                         'rev-deleted-text-permission'
2770                                                 );
2771                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2772                                                 $wgOut->wrapWikiMsg(
2773                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2774                                                         'rev-deleted-text-view'
2775                                                 );
2776                                         }
2777
2778                                         if ( !$revision->isCurrent() ) {
2779                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2780                                                 $wgOut->addWikiMsg( 'editingold' );
2781                                         }
2782                                 } elseif ( $this->mTitle->exists() ) {
2783                                         // Something went wrong
2784
2785                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2786                                                 array( 'missing-revision', $this->oldid ) );
2787                                 }
2788                         }
2789                 }
2790
2791                 if ( wfReadOnly() ) {
2792                         $wgOut->wrapWikiMsg(
2793                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2794                                 array( 'readonlywarning', wfReadOnlyReason() )
2795                         );
2796                 } elseif ( $wgUser->isAnon() ) {
2797                         if ( $this->formtype != 'preview' ) {
2798                                 $wgOut->wrapWikiMsg(
2799                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2800                                         array( 'anoneditwarning',
2801                                                 // Log-in link
2802                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2803                                                 // Sign-up link
2804                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2805                                 );
2806                         } else {
2807                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2808                                         'anonpreviewwarning'
2809                                 );
2810                         }
2811                 } else {
2812                         if ( $this->isCssJsSubpage ) {
2813                                 # Check the skin exists
2814                                 if ( $this->isWrongCaseCssJsPage ) {
2815                                         $wgOut->wrapWikiMsg(
2816                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2817                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2818                                         );
2819                                 }
2820                                 if ( $this->getTitle()->isSubpageOf( $wgUser->getUserPage() ) ) {
2821                                         if ( $this->formtype !== 'preview' ) {
2822                                                 if ( $this->isCssSubpage && $wgAllowUserCss ) {
2823                                                         $wgOut->wrapWikiMsg(
2824                                                                 "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2825                                                                 array( 'usercssyoucanpreview' )
2826                                                         );
2827                                                 }
2828
2829                                                 if ( $this->isJsSubpage && $wgAllowUserJs ) {
2830                                                         $wgOut->wrapWikiMsg(
2831                                                                 "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2832                                                                 array( 'userjsyoucanpreview' )
2833                                                         );
2834                                                 }
2835                                         }
2836                                 }
2837                         }
2838                 }
2839
2840                 if ( $this->mTitle->isProtected( 'edit' ) &&
2841                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2842                 ) {
2843                         # Is the title semi-protected?
2844                         if ( $this->mTitle->isSemiProtected() ) {
2845                                 $noticeMsg = 'semiprotectedpagewarning';
2846                         } else {
2847                                 # Then it must be protected based on static groups (regular)
2848                                 $noticeMsg = 'protectedpagewarning';
2849                         }
2850                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2851                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2852                 }
2853                 if ( $this->mTitle->isCascadeProtected() ) {
2854                         # Is this page under cascading protection from some source pages?
2855                         /** @var Title[] $cascadeSources */
2856                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2857                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2858                         $cascadeSourcesCount = count( $cascadeSources );
2859                         if ( $cascadeSourcesCount > 0 ) {
2860                                 # Explain, and list the titles responsible
2861                                 foreach ( $cascadeSources as $page ) {
2862                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2863                                 }
2864                         }
2865                         $notice .= '</div>';
2866                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2867                 }
2868                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2869                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2870                                 array( 'lim' => 1,
2871                                         'showIfEmpty' => false,
2872                                         'msgKey' => array( 'titleprotectedwarning' ),
2873                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2874                 }
2875
2876                 if ( $this->kblength === false ) {
2877                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2878                 }
2879
2880                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2881                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2882                                 array(
2883                                         'longpageerror',
2884                                         $wgLang->formatNum( $this->kblength ),
2885                                         $wgLang->formatNum( $wgMaxArticleSize )
2886                                 )
2887                         );
2888                 } else {
2889                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2890                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2891                                         array(
2892                                                 'longpage-hint',
2893                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2894                                                 strlen( $this->textbox1 )
2895                                         )
2896                                 );
2897                         }
2898                 }
2899                 # Add header copyright warning
2900                 $this->showHeaderCopyrightWarning();
2901
2902                 return true;
2903         }
2904
2905         /**
2906          * Standard summary input and label (wgSummary), abstracted so EditPage
2907          * subclasses may reorganize the form.
2908          * Note that you do not need to worry about the label's for=, it will be
2909          * inferred by the id given to the input. You can remove them both by
2910          * passing array( 'id' => false ) to $userInputAttrs.
2911          *
2912          * @param string $summary The value of the summary input
2913          * @param string $labelText The html to place inside the label
2914          * @param array $inputAttrs Array of attrs to use on the input
2915          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2916          *
2917          * @return array An array in the format array( $label, $input )
2918          */
2919         function getSummaryInput( $summary = "", $labelText = null,
2920                 $inputAttrs = null, $spanLabelAttrs = null
2921         ) {
2922                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2923                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2924                         'id' => 'wpSummary',
2925                         'maxlength' => '200',
2926                         'tabindex' => '1',
2927                         'size' => 60,
2928                         'spellcheck' => 'true',
2929                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2930
2931                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2932                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2933                         'id' => "wpSummaryLabel"
2934                 );
2935
2936                 $label = null;
2937                 if ( $labelText ) {
2938                         $label = Xml::tags(
2939                                 'label',
2940                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2941                                 $labelText
2942                         );
2943                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2944                 }
2945
2946                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2947
2948                 return array( $label, $input );
2949         }
2950
2951         /**
2952          * @param bool $isSubjectPreview True if this is the section subject/title
2953          *   up top, or false if this is the comment summary
2954          *   down below the textarea
2955          * @param string $summary The text of the summary to display
2956          */
2957         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2958                 global $wgOut, $wgContLang;
2959                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2960                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2961                 if ( $isSubjectPreview ) {
2962                         if ( $this->nosummary ) {
2963                                 return;
2964                         }
2965                 } else {
2966                         if ( !$this->mShowSummaryField ) {
2967                                 return;
2968                         }
2969                 }
2970                 $summary = $wgContLang->recodeForEdit( $summary );
2971                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2972                 list( $label, $input ) = $this->getSummaryInput(
2973                         $summary,
2974                         $labelText,
2975                         array( 'class' => $summaryClass ),
2976                         array()
2977                 );
2978                 $wgOut->addHTML( "{$label} {$input}" );
2979         }
2980
2981         /**
2982          * @param bool $isSubjectPreview True if this is the section subject/title
2983          *   up top, or false if this is the comment summary
2984          *   down below the textarea
2985          * @param string $summary The text of the summary to display
2986          * @return string
2987          */
2988         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2989                 // avoid spaces in preview, gets always trimmed on save
2990                 $summary = trim( $summary );
2991                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2992                         return "";
2993                 }
2994
2995                 global $wgParser;
2996
2997                 if ( $isSubjectPreview ) {
2998                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2999                                 ->inContentLanguage()->text();
3000                 }
3001
3002                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
3003
3004                 $summary = wfMessage( $message )->parse()
3005                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
3006                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
3007         }
3008
3009         protected function showFormBeforeText() {
3010                 global $wgOut;
3011                 $section = htmlspecialchars( $this->section );
3012                 $wgOut->addHTML( <<<HTML
3013 <input type='hidden' value="{$section}" name="wpSection"/>
3014 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
3015 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
3016 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
3017
3018 HTML
3019                 );
3020                 if ( !$this->checkUnicodeCompliantBrowser() ) {
3021                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
3022                 }
3023         }
3024
3025         protected function showFormAfterText() {
3026                 global $wgOut, $wgUser;
3027                 /**
3028                  * To make it harder for someone to slip a user a page
3029                  * which submits an edit form to the wiki without their
3030                  * knowledge, a random token is associated with the login
3031                  * session. If it's not passed back with the submission,
3032                  * we won't save the page, or render user JavaScript and
3033                  * CSS previews.
3034                  *
3035                  * For anon editors, who may not have a session, we just
3036                  * include the constant suffix to prevent editing from
3037                  * broken text-mangling proxies.
3038                  */
3039                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
3040         }
3041
3042         /**
3043          * Subpage overridable method for printing the form for page content editing
3044          * By default this simply outputs wpTextbox1
3045          * Subclasses can override this to provide a custom UI for editing;
3046          * be it a form, or simply wpTextbox1 with a modified content that will be
3047          * reverse modified when extracted from the post data.
3048          * Note that this is basically the inverse for importContentFormData
3049          */
3050         protected function showContentForm() {
3051                 $this->showTextbox1();
3052         }
3053
3054         /**
3055          * Method to output wpTextbox1
3056          * The $textoverride method can be used by subclasses overriding showContentForm
3057          * to pass back to this method.
3058          *
3059          * @param array $customAttribs Array of html attributes to use in the textarea
3060          * @param string $textoverride Optional text to override $this->textarea1 with
3061          */
3062         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
3063                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
3064                         $attribs = array( 'style' => 'display:none;' );
3065                 } else {
3066                         $classes = array(); // Textarea CSS
3067                         if ( $this->mTitle->isProtected( 'edit' ) &&
3068                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
3069                         ) {
3070                                 # Is the title semi-protected?
3071                                 if ( $this->mTitle->isSemiProtected() ) {
3072                                         $classes[] = 'mw-textarea-sprotected';
3073                                 } else {
3074                                         # Then it must be protected based on static groups (regular)
3075                                         $classes[] = 'mw-textarea-protected';
3076                                 }
3077                                 # Is the title cascade-protected?
3078                                 if ( $this->mTitle->isCascadeProtected() ) {
3079                                         $classes[] = 'mw-textarea-cprotected';
3080                                 }
3081                         }
3082
3083                         $attribs = array( 'tabindex' => 1 );
3084
3085                         if ( is_array( $customAttribs ) ) {
3086                                 $attribs += $customAttribs;
3087                         }
3088
3089                         if ( count( $classes ) ) {
3090                                 if ( isset( $attribs['class'] ) ) {
3091                                         $classes[] = $attribs['class'];
3092                                 }
3093                                 $attribs['class'] = implode( ' ', $classes );
3094                         }
3095                 }
3096
3097                 $this->showTextbox(
3098                         $textoverride !== null ? $textoverride : $this->textbox1,
3099                         'wpTextbox1',
3100                         $attribs
3101                 );
3102         }
3103
3104         protected function showTextbox2() {
3105                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
3106         }
3107
3108         protected function showTextbox( $text, $name, $customAttribs = array() ) {
3109                 global $wgOut, $wgUser;
3110
3111                 $wikitext = $this->safeUnicodeOutput( $text );
3112                 if ( strval( $wikitext ) !== '' ) {
3113                         // Ensure there's a newline at the end, otherwise adding lines
3114                         // is awkward.
3115                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3116                         // mode will show an extra newline. A bit annoying.
3117                         $wikitext .= "\n";
3118                 }
3119
3120                 $attribs = $customAttribs + array(
3121                         'accesskey' => ',',
3122                         'id' => $name,
3123                         'cols' => $wgUser->getIntOption( 'cols' ),
3124                         'rows' => $wgUser->getIntOption( 'rows' ),
3125                         // Avoid PHP notices when appending preferences
3126                         // (appending allows customAttribs['style'] to still work).
3127                         'style' => ''
3128                 );
3129
3130                 $pageLang = $this->mTitle->getPageLanguage();
3131                 $attribs['lang'] = $pageLang->getHtmlCode();
3132                 $attribs['dir'] = $pageLang->getDir();
3133
3134                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3135         }
3136
3137         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3138                 global $wgOut;
3139                 $classes = array();
3140                 if ( $isOnTop ) {
3141                         $classes[] = 'ontop';
3142                 }
3143
3144                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3145
3146                 if ( $this->formtype != 'preview' ) {
3147                         $attribs['style'] = 'display: none;';
3148                 }
3149
3150                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3151
3152                 if ( $this->formtype == 'preview' ) {
3153                         $this->showPreview( $previewOutput );
3154                 } else {
3155                         // Empty content container for LivePreview
3156                         $pageViewLang = $this->mTitle->getPageViewLanguage();
3157                         $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3158                                 'class' => 'mw-content-' . $pageViewLang->getDir() );
3159                         $wgOut->addHTML( Html::rawElement( 'div', $attribs ) );
3160                 }
3161
3162                 $wgOut->addHTML( '</div>' );
3163
3164                 if ( $this->formtype == 'diff' ) {
3165                         try {
3166                                 $this->showDiff();
3167                         } catch ( MWContentSerializationException $ex ) {
3168                                 $msg = wfMessage(
3169                                         'content-failed-to-parse',
3170                                         $this->contentModel,
3171                                         $this->contentFormat,
3172                                         $ex->getMessage()
3173                                 );
3174                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3175                         }
3176                 }
3177         }
3178
3179         /**
3180          * Append preview output to $wgOut.
3181          * Includes category rendering if this is a category page.
3182          *
3183          * @param string $text The HTML to be output for the preview.
3184          */
3185         protected function showPreview( $text ) {
3186                 global $wgOut;
3187                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3188                         $this->mArticle->openShowCategory();
3189                 }
3190                 # This hook seems slightly odd here, but makes things more
3191                 # consistent for extensions.
3192                 Hooks::run( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3193                 $wgOut->addHTML( $text );
3194                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3195                         $this->mArticle->closeShowCategory();
3196                 }
3197         }
3198
3199         /**
3200          * Get a diff between the current contents of the edit box and the
3201          * version of the page we're editing from.
3202          *
3203          * If this is a section edit, we'll replace the section as for final
3204          * save and then make a comparison.
3205          */
3206         function showDiff() {
3207                 global $wgUser, $wgContLang, $wgOut;
3208
3209                 $oldtitlemsg = 'currentrev';
3210                 # if message does not exist, show diff against the preloaded default
3211                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3212                         $oldtext = $this->mTitle->getDefaultMessageText();
3213                         if ( $oldtext !== false ) {
3214                                 $oldtitlemsg = 'defaultmessagetext';
3215                                 $oldContent = $this->toEditContent( $oldtext );
3216                         } else {
3217                                 $oldContent = null;
3218                         }
3219                 } else {
3220                         $oldContent = $this->getCurrentContent();
3221                 }
3222
3223                 $textboxContent = $this->toEditContent( $this->textbox1 );
3224
3225                 $newContent = $this->page->replaceSectionContent(
3226                                                         $this->section, $textboxContent,
3227                                                         $this->summary, $this->edittime );
3228
3229                 if ( $newContent ) {
3230                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3231                         Hooks::run( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3232
3233                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3234                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3235                 }
3236
3237                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3238                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3239                         $newtitle = wfMessage( 'yourtext' )->parse();
3240
3241                         if ( !$oldContent ) {
3242                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3243                         }
3244
3245                         if ( !$newContent ) {
3246                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3247                         }
3248
3249                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3250                         $de->setContent( $oldContent, $newContent );
3251
3252                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3253                         $de->showDiffStyle();
3254                 } else {
3255                         $difftext = '';
3256                 }
3257
3258                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3259         }
3260
3261         /**
3262          * Show the header copyright warning.
3263          */
3264         protected function showHeaderCopyrightWarning() {
3265                 $msg = 'editpage-head-copy-warn';
3266                 if ( !wfMessage( $msg )->isDisabled() ) {
3267                         global $wgOut;
3268                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3269                                 'editpage-head-copy-warn' );
3270                 }
3271         }
3272
3273         /**
3274          * Give a chance for site and per-namespace customizations of
3275          * terms of service summary link that might exist separately
3276          * from the copyright notice.
3277          *
3278          * This will display between the save button and the edit tools,
3279          * so should remain short!
3280          */
3281         protected function showTosSummary() {
3282                 $msg = 'editpage-tos-summary';
3283                 Hooks::run( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3284                 if ( !wfMessage( $msg )->isDisabled() ) {
3285                         global $wgOut;
3286                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3287                         $wgOut->addWikiMsg( $msg );
3288                         $wgOut->addHTML( '</div>' );
3289                 }
3290         }
3291
3292         protected function showEditTools() {
3293                 global $wgOut;
3294                 $wgOut->addHTML( '<div class="mw-editTools">' .
3295                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3296                         '</div>' );
3297         }
3298
3299         /**
3300          * Get the copyright warning
3301          *
3302          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3303          * @return string
3304          */
3305         protected function getCopywarn() {
3306                 return self::getCopyrightWarning( $this->mTitle );
3307         }
3308
3309         /**
3310          * Get the copyright warning, by default returns wikitext
3311          *
3312          * @param Title $title
3313          * @param string $format Output format, valid values are any function of a Message object
3314          * @return string
3315          */
3316         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3317                 global $wgRightsText;
3318                 if ( $wgRightsText ) {
3319                         $copywarnMsg = array( 'copyrightwarning',
3320                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3321                                 $wgRightsText );
3322                 } else {
3323                         $copywarnMsg = array( 'copyrightwarning2',
3324                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3325                 }
3326                 // Allow for site and per-namespace customization of contribution/copyright notice.
3327                 Hooks::run( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3328
3329                 return "<div id=\"editpage-copywarn\">\n" .
3330                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3331         }
3332
3333         /**
3334          * Get the Limit report for page previews
3335          *
3336          * @since 1.22
3337          * @param ParserOutput $output ParserOutput object from the parse
3338          * @return string HTML
3339          */
3340         public static function getPreviewLimitReport( $output ) {
3341                 if ( !$output || !$output->getLimitReportData() ) {
3342                         return '';
3343                 }
3344
3345                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3346                         wfMessage( 'limitreport-title' )->parseAsBlock()
3347                 );
3348
3349                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3350                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3351
3352                 $limitReport .= Html::openElement( 'table', array(
3353                         'class' => 'preview-limit-report wikitable'
3354                 ) ) .
3355                         Html::openElement( 'tbody' );
3356
3357                 foreach ( $output->getLimitReportData() as $key => $value ) {
3358                         if ( Hooks::run( 'ParserLimitReportFormat',
3359                                 array( $key, &$value, &$limitReport, true, true )
3360                         ) ) {
3361                                 $keyMsg = wfMessage( $key );
3362                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3363                                 if ( !$valueMsg->exists() ) {
3364                                         $valueMsg = new RawMessage( '$1' );
3365                                 }
3366                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3367                                         $limitReport .= Html::openElement( 'tr' ) .
3368                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3369                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3370                                                 Html::closeElement( 'tr' );
3371                                 }
3372                         }
3373                 }
3374
3375                 $limitReport .= Html::closeElement( 'tbody' ) .
3376                         Html::closeElement( 'table' ) .
3377                         Html::closeElement( 'div' );
3378
3379                 return $limitReport;
3380         }
3381
3382         protected function showStandardInputs( &$tabindex = 2 ) {
3383                 global $wgOut;
3384                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3385
3386                 if ( $this->section != 'new' ) {
3387                         $this->showSummaryInput( false, $this->summary );
3388                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3389                 }
3390
3391                 $checkboxes = $this->getCheckboxes( $tabindex,
3392                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3393                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3394
3395                 // Show copyright warning.
3396                 $wgOut->addWikiText( $this->getCopywarn() );
3397                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3398
3399                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3400                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3401
3402                 $cancel = $this->getCancelLink();
3403                 if ( $cancel !== '' ) {
3404                         $cancel .= Html::element( 'span',
3405                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3406                                 wfMessage( 'pipe-separator' )->text() );
3407                 }
3408
3409                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3410                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3411                 $attrs = array(
3412                         'target' => 'helpwindow',
3413                         'href' => $edithelpurl,
3414                 );
3415                 $edithelp = Html::linkButton( wfMessage( 'edithelp' )->text(),
3416                         $attrs, array( 'mw-ui-quiet' ) ) .
3417                         wfMessage( 'word-separator' )->escaped() .
3418                         wfMessage( 'newwindow' )->parse();
3419
3420                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3421                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3422                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3423
3424                 Hooks::run( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3425
3426                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3427         }
3428
3429         /**
3430          * Show an edit conflict. textbox1 is already shown in showEditForm().
3431          * If you want to use another entry point to this function, be careful.
3432          */
3433         protected function showConflict() {
3434                 global $wgOut;
3435
3436                 if ( Hooks::run( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3437                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3438
3439                         $content1 = $this->toEditContent( $this->textbox1 );
3440                         $content2 = $this->toEditContent( $this->textbox2 );
3441
3442                         $handler = ContentHandler::getForModelID( $this->contentModel );
3443                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3444                         $de->setContent( $content2, $content1 );
3445                         $de->showDiff(
3446                                 wfMessage( 'yourtext' )->parse(),
3447                                 wfMessage( 'storedversion' )->text()
3448                         );
3449
3450                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3451                         $this->showTextbox2();
3452                 }
3453         }
3454
3455         /**
3456          * @return string
3457          */
3458         public function getCancelLink() {
3459                 $cancelParams = array();
3460                 if ( !$this->isConflict && $this->oldid > 0 ) {
3461                         $cancelParams['oldid'] = $this->oldid;
3462                 }
3463                 $attrs = array( 'id' => 'mw-editform-cancel' );
3464
3465                 return Linker::linkKnown(
3466                         $this->getContextTitle(),
3467                         wfMessage( 'cancel' )->parse(),
3468                         Html::buttonAttributes( $attrs, array( 'mw-ui-quiet' ) ),
3469                         $cancelParams
3470                 );
3471         }
3472
3473         /**
3474          * Returns the URL to use in the form's action attribute.
3475          * This is used by EditPage subclasses when simply customizing the action
3476          * variable in the constructor is not enough. This can be used when the
3477          * EditPage lives inside of a Special page rather than a custom page action.
3478          *
3479          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3480          * @return string
3481          */
3482         protected function getActionURL( Title $title ) {
3483                 return $title->getLocalURL( array( 'action' => $this->action ) );
3484         }
3485
3486         /**
3487          * Check if a page was deleted while the user was editing it, before submit.
3488          * Note that we rely on the logging table, which hasn't been always there,
3489          * but that doesn't matter, because this only applies to brand new
3490          * deletes.
3491          * @return bool
3492          */
3493         protected function wasDeletedSinceLastEdit() {
3494                 if ( $this->deletedSinceEdit !== null ) {
3495                         return $this->deletedSinceEdit;
3496                 }
3497
3498                 $this->deletedSinceEdit = false;
3499
3500                 if ( !$this->mTitle->exists() && $this->mTitle->isDeletedQuick() ) {
3501                         $this->lastDelete = $this->getLastDelete();
3502                         if ( $this->lastDelete ) {
3503                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3504                                 if ( $deleteTime > $this->starttime ) {
3505                                         $this->deletedSinceEdit = true;
3506                                 }
3507                         }
3508                 }
3509
3510                 return $this->deletedSinceEdit;
3511         }
3512
3513         /**
3514          * @return bool|stdClass
3515          */
3516         protected function getLastDelete() {
3517                 $dbr = wfGetDB( DB_SLAVE );
3518                 $data = $dbr->selectRow(
3519                         array( 'logging', 'user' ),
3520                         array(
3521                                 'log_type',
3522                                 'log_action',
3523                                 'log_timestamp',
3524                                 'log_user',
3525                                 'log_namespace',
3526                                 'log_title',
3527                                 'log_comment',
3528                                 'log_params',
3529                                 'log_deleted',
3530                                 'user_name'
3531                         ), array(
3532                                 'log_namespace' => $this->mTitle->getNamespace(),
3533                                 'log_title' => $this->mTitle->getDBkey(),
3534                                 'log_type' => 'delete',
3535                                 'log_action' => 'delete',
3536                                 'user_id=log_user'
3537                         ),
3538                         __METHOD__,
3539                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3540                 );
3541                 // Quick paranoid permission checks...
3542                 if ( is_object( $data ) ) {
3543                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3544                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3545                         }
3546
3547                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3548                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3549                         }
3550                 }
3551
3552                 return $data;
3553         }
3554
3555         /**
3556          * Get the rendered text for previewing.
3557          * @throws MWException
3558          * @return string
3559          */
3560         function getPreviewText() {
3561                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3562                 global $wgAllowUserCss, $wgAllowUserJs;
3563
3564                 $stats = $wgOut->getContext()->getStats();
3565
3566                 if ( $wgRawHtml && !$this->mTokenOk ) {
3567                         // Could be an offsite preview attempt. This is very unsafe if
3568                         // HTML is enabled, as it could be an attack.
3569                         $parsedNote = '';
3570                         if ( $this->textbox1 !== '' ) {
3571                                 // Do not put big scary notice, if previewing the empty
3572                                 // string, which happens when you initially edit
3573                                 // a category page, due to automatic preview-on-open.
3574                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3575                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3576                         }
3577                         $stats->increment( 'edit.failures.session_loss' );
3578                         return $parsedNote;
3579                 }
3580
3581                 $note = '';
3582
3583                 try {
3584                         $content = $this->toEditContent( $this->textbox1 );
3585
3586                         $previewHTML = '';
3587                         if ( !Hooks::run(
3588                                 'AlternateEditPreview',
3589                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3590                         ) {
3591                                 return $previewHTML;
3592                         }
3593
3594                         # provide a anchor link to the editform
3595                         $continueEditing = '<span class="mw-continue-editing">' .
3596                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3597                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3598                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3599                                 if ( $this->mTokenOkExceptSuffix ) {
3600                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3601                                         $stats->increment( 'edit.failures.bad_token' );
3602                                 } else {
3603                                         $note = wfMessage( 'session_fail_preview' )->plain();
3604                                         $stats->increment( 'edit.failures.session_loss' );
3605                                 }
3606                         } elseif ( $this->incompleteForm ) {
3607                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3608                                 if ( $this->mTriedSave ) {
3609                                         $stats->increment( 'edit.failures.incomplete_form' );
3610                                 }
3611                         } else {
3612                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3613                         }
3614
3615                         $parserOptions = $this->page->makeParserOptions( $this->mArticle->getContext() );
3616                         $parserOptions->setIsPreview( true );
3617                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3618
3619                         # don't parse non-wikitext pages, show message about preview
3620                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3621                                 if ( $this->mTitle->isCssJsSubpage() ) {
3622                                         $level = 'user';
3623                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3624                                         $level = 'site';
3625                                 } else {
3626                                         $level = false;
3627                                 }
3628
3629                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3630                                         $format = 'css';
3631                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3632                                                 $format = false;
3633                                         }
3634                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3635                                         $format = 'js';
3636                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3637                                                 $format = false;
3638                                         }
3639                                 } else {
3640                                         $format = false;
3641                                 }
3642
3643                                 # Used messages to make sure grep find them:
3644                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3645                                 if ( $level && $format ) {
3646                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3647                                                 wfMessage( "{$level}{$format}preview" )->text() .
3648                                                 ' ' . $continueEditing . "</div>";
3649                                 }
3650                         }
3651
3652                         # If we're adding a comment, we need to show the
3653                         # summary as the headline
3654                         if ( $this->section === "new" && $this->summary !== "" ) {
3655                                 $content = $content->addSectionHeader( $this->summary );
3656                         }
3657
3658                         $hook_args = array( $this, &$content );
3659                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3660                         Hooks::run( 'EditPageGetPreviewContent', $hook_args );
3661
3662                         $parserOptions->enableLimitReport();
3663
3664                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3665                         # But it's now deprecated, so never mind
3666
3667                         $pstContent = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3668                         $scopedCallback = $parserOptions->setupFakeRevision(
3669                                 $this->mTitle, $pstContent, $wgUser );
3670                         $parserOutput = $pstContent->getParserOutput( $this->mTitle, null, $parserOptions );
3671
3672                         # Try to stash the edit for the final submission step
3673                         # @todo: different date format preferences cause cache misses
3674                         ApiStashEdit::stashEditFromPreview(
3675                                 $this->getArticle(), $content, $pstContent,
3676                                 $parserOutput, $parserOptions, $parserOptions, wfTimestampNow()
3677                         );
3678
3679                         $parserOutput->setEditSectionTokens( false ); // no section edit links
3680                         $previewHTML = $parserOutput->getText();
3681                         $this->mParserOutput = $parserOutput;
3682                         $wgOut->addParserOutputMetadata( $parserOutput );
3683
3684                         if ( count( $parserOutput->getWarnings() ) ) {
3685                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3686                         }
3687
3688                         ScopedCallback::consume( $scopedCallback );
3689                 } catch ( MWContentSerializationException $ex ) {
3690                         $m = wfMessage(
3691                                 'content-failed-to-parse',
3692                                 $this->contentModel,
3693                                 $this->contentFormat,
3694                                 $ex->getMessage()
3695                         );
3696                         $note .= "\n\n" . $m->parse();
3697                         $previewHTML = '';
3698                 }
3699
3700                 if ( $this->isConflict ) {
3701                         $conflict = '<h2 id="mw-previewconflict">'
3702                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3703                 } else {
3704                         $conflict = '<hr />';
3705                 }
3706
3707                 $previewhead = "<div class='previewnote'>\n" .
3708                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3709                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3710
3711                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3712                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3713                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3714                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3715
3716                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3717         }
3718
3719         /**
3720          * @return array
3721          */
3722         function getTemplates() {
3723                 if ( $this->preview || $this->section != '' ) {
3724                         $templates = array();
3725                         if ( !isset( $this->mParserOutput ) ) {
3726                                 return $templates;
3727                         }
3728                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3729                                 foreach ( array_keys( $template ) as $dbk ) {
3730                                         $templates[] = Title::makeTitle( $ns, $dbk );
3731                                 }
3732                         }
3733                         return $templates;
3734                 } else {
3735                         return $this->mTitle->getTemplateLinksFrom();
3736                 }
3737         }
3738
3739         /**
3740          * Shows a bulletin board style toolbar for common editing functions.
3741          * It can be disabled in the user preferences.
3742          *
3743          * @param $title Title object for the page being edited (optional)
3744          * @return string
3745          */
3746         static function getEditToolbar( $title = null ) {
3747                 global $wgContLang, $wgOut;
3748                 global $wgEnableUploads, $wgForeignFileRepos;
3749
3750                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3751                 $showSignature = true;
3752                 if ( $title ) {
3753                         $showSignature = MWNamespace::wantSignatures( $title->getNamespace() );
3754                 }
3755
3756                 /**
3757                  * $toolarray is an array of arrays each of which includes the
3758                  * opening tag, the closing tag, optionally a sample text that is
3759                  * inserted between the two when no selection is highlighted
3760                  * and.  The tip text is shown when the user moves the mouse
3761                  * over the button.
3762                  *
3763                  * Images are defined in ResourceLoaderEditToolbarModule.
3764                  */
3765                 $toolarray = array(
3766                         array(
3767                                 'id'     => 'mw-editbutton-bold',
3768                                 'open'   => '\'\'\'',
3769                                 'close'  => '\'\'\'',
3770                                 'sample' => wfMessage( 'bold_sample' )->text(),
3771                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3772                         ),
3773                         array(
3774                                 'id'     => 'mw-editbutton-italic',
3775                                 'open'   => '\'\'',
3776                                 'close'  => '\'\'',
3777                                 'sample' => wfMessage( 'italic_sample' )->text(),
3778                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3779                         ),
3780                         array(
3781                                 'id'     => 'mw-editbutton-link',
3782                                 'open'   => '[[',
3783                                 'close'  => ']]',
3784                                 'sample' => wfMessage( 'link_sample' )->text(),
3785                                 'tip'    => wfMessage( 'link_tip' )->text(),
3786                         ),
3787                         array(
3788                                 'id'     => 'mw-editbutton-extlink',
3789                                 'open'   => '[',
3790                                 'close'  => ']',
3791                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3792                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3793                         ),
3794                         array(
3795                                 'id'     => 'mw-editbutton-headline',
3796                                 'open'   => "\n== ",
3797                                 'close'  => " ==\n",
3798                                 'sample' => wfMessage( 'headline_sample' )->text(),
3799                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3800                         ),
3801                         $imagesAvailable ? array(
3802                                 'id'     => 'mw-editbutton-image',
3803                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3804                                 'close'  => ']]',
3805                                 'sample' => wfMessage( 'image_sample' )->text(),
3806                                 'tip'    => wfMessage( 'image_tip' )->text(),
3807                         ) : false,
3808                         $imagesAvailable ? array(
3809                                 'id'     => 'mw-editbutton-media',
3810                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3811                                 'close'  => ']]',
3812                                 'sample' => wfMessage( 'media_sample' )->text(),
3813                                 'tip'    => wfMessage( 'media_tip' )->text(),
3814                         ) : false,
3815                         array(
3816                                 'id'     => 'mw-editbutton-nowiki',
3817                                 'open'   => "<nowiki>",
3818                                 'close'  => "</nowiki>",
3819                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3820                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3821                         ),
3822                         $showSignature ? array(
3823                                 'id'     => 'mw-editbutton-signature',
3824                                 'open'   => '--~~~~',
3825                                 'close'  => '',
3826                                 'sample' => '',
3827                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3828                         ) : false,
3829                         array(
3830                                 'id'     => 'mw-editbutton-hr',
3831                                 'open'   => "\n----\n",
3832                                 'close'  => '',
3833                                 'sample' => '',
3834                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3835                         )
3836                 );
3837
3838                 $script = 'mw.loader.using("mediawiki.toolbar", function () {';
3839                 foreach ( $toolarray as $tool ) {
3840                         if ( !$tool ) {
3841                                 continue;
3842                         }
3843
3844                         $params = array(
3845                                 // Images are defined in ResourceLoaderEditToolbarModule
3846                                 false,
3847                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3848                                 // Older browsers show a "speedtip" type message only for ALT.
3849                                 // Ideally these should be different, realistically they
3850                                 // probably don't need to be.
3851                                 $tool['tip'],
3852                                 $tool['open'],
3853                                 $tool['close'],
3854                                 $tool['sample'],
3855                                 $tool['id'],
3856                         );
3857
3858                         $script .= Xml::encodeJsCall(
3859                                 'mw.toolbar.addButton',
3860                                 $params,
3861                                 ResourceLoader::inDebugMode()
3862                         );
3863                 }
3864
3865                 $script .= '});';
3866                 $wgOut->addScript( ResourceLoader::makeInlineScript( $script ) );
3867
3868                 $toolbar = '<div id="toolbar"></div>';
3869
3870                 Hooks::run( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3871
3872                 return $toolbar;
3873         }
3874
3875         /**
3876          * Returns an array of html code of the following checkboxes:
3877          * minor and watch
3878          *
3879          * @param int $tabindex Current tabindex
3880          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3881          *                 status of the checkbox
3882          *
3883          * @return array
3884          */
3885         public function getCheckboxes( &$tabindex, $checked ) {
3886                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3887
3888                 $checkboxes = array();
3889
3890                 // don't show the minor edit checkbox if it's a new page or section
3891                 if ( !$this->isNew ) {
3892                         $checkboxes['minor'] = '';
3893                         $minorLabel = wfMessage( 'minoredit' )->parse();
3894                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3895                                 $attribs = array(
3896                                         'tabindex' => ++$tabindex,
3897                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3898                                         'id' => 'wpMinoredit',
3899                                 );
3900                                 $minorEditHtml =
3901                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3902                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3903                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3904                                         ">{$minorLabel}</label>";
3905
3906                                 if ( $wgUseMediaWikiUIEverywhere ) {
3907                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3908                                                 $minorEditHtml .
3909                                         Html::closeElement( 'div' );
3910                                 } else {
3911                                         $checkboxes['minor'] = $minorEditHtml;
3912                                 }
3913                         }
3914                 }
3915
3916                 $watchLabel = wfMessage( 'watchthis' )->parse();
3917                 $checkboxes['watch'] = '';
3918                 if ( $wgUser->isLoggedIn() ) {
3919                         $attribs = array(
3920                                 'tabindex' => ++$tabindex,
3921                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3922                                 'id' => 'wpWatchthis',
3923                         );
3924                         $watchThisHtml =
3925                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3926                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3927                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3928                                 ">{$watchLabel}</label>";
3929                         if ( $wgUseMediaWikiUIEverywhere ) {
3930                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3931                                         $watchThisHtml .
3932                                         Html::closeElement( 'div' );
3933                         } else {
3934                                 $checkboxes['watch'] = $watchThisHtml;
3935                         }
3936                 }
3937                 Hooks::run( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3938                 return $checkboxes;
3939         }
3940
3941         /**
3942          * Returns an array of html code of the following buttons:
3943          * save, diff, preview and live
3944          *
3945          * @param int $tabindex Current tabindex
3946          *
3947          * @return array
3948          */
3949         public function getEditButtons( &$tabindex ) {
3950                 $buttons = array();
3951
3952                 $attribs = array(
3953                         'id' => 'wpSave',
3954                         'name' => 'wpSave',
3955                         'tabindex' => ++$tabindex,
3956                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3957                 $buttons['save'] = Html::submitButton( wfMessage( 'savearticle' )->text(),
3958                         $attribs, array( 'mw-ui-constructive' ) );
3959
3960                 ++$tabindex; // use the same for preview and live preview
3961                 $attribs = array(
3962                         'id' => 'wpPreview',
3963                         'name' => 'wpPreview',
3964                         'tabindex' => $tabindex,
3965                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3966                 $buttons['preview'] = Html::submitButton( wfMessage( 'showpreview' )->text(),
3967                         $attribs );
3968                 $buttons['live'] = '';
3969
3970                 $attribs = array(
3971                         'id' => 'wpDiff',
3972                         'name' => 'wpDiff',
3973                         'tabindex' => ++$tabindex,
3974                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3975                 $buttons['diff'] = Html::submitButton( wfMessage( 'showdiff' )->text(),
3976                         $attribs );
3977
3978                 Hooks::run( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3979                 return $buttons;
3980         }
3981
3982         /**
3983          * Creates a basic error page which informs the user that
3984          * they have attempted to edit a nonexistent section.
3985          */
3986         function noSuchSectionPage() {
3987                 global $wgOut;
3988
3989                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3990
3991                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3992                 Hooks::run( 'EditPageNoSuchSection', array( &$this, &$res ) );
3993                 $wgOut->addHTML( $res );
3994
3995                 $wgOut->returnToMain( false, $this->mTitle );
3996         }
3997
3998         /**
3999          * Show "your edit contains spam" page with your diff and text
4000          *
4001          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
4002          */
4003         public function spamPageWithContent( $match = false ) {
4004                 global $wgOut, $wgLang;
4005                 $this->textbox2 = $this->textbox1;
4006
4007                 if ( is_array( $match ) ) {
4008                         $match = $wgLang->listToText( $match );
4009                 }
4010                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
4011
4012                 $wgOut->addHTML( '<div id="spamprotected">' );
4013                 $wgOut->addWikiMsg( 'spamprotectiontext' );
4014                 if ( $match ) {
4015                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
4016                 }
4017                 $wgOut->addHTML( '</div>' );
4018
4019                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
4020                 $this->showDiff();
4021
4022                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
4023                 $this->showTextbox2();
4024
4025                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
4026         }
4027
4028         /**
4029          * Check if the browser is on a blacklist of user-agents known to
4030          * mangle UTF-8 data on form submission. Returns true if Unicode
4031          * should make it through, false if it's known to be a problem.
4032          * @return bool
4033          */
4034         private function checkUnicodeCompliantBrowser() {
4035                 global $wgBrowserBlackList, $wgRequest;
4036
4037                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
4038                 if ( $currentbrowser === false ) {
4039                         // No User-Agent header sent? Trust it by default...
4040                         return true;
4041                 }
4042
4043                 foreach ( $wgBrowserBlackList as $browser ) {
4044                         if ( preg_match( $browser, $currentbrowser ) ) {
4045                                 return false;
4046                         }
4047                 }
4048                 return true;
4049         }
4050
4051         /**
4052          * Filter an input field through a Unicode de-armoring process if it
4053          * came from an old browser with known broken Unicode editing issues.
4054          *
4055          * @param WebRequest $request
4056          * @param string $field
4057          * @return string
4058          */
4059         protected function safeUnicodeInput( $request, $field ) {
4060                 $text = rtrim( $request->getText( $field ) );
4061                 return $request->getBool( 'safemode' )
4062                         ? $this->unmakeSafe( $text )
4063                         : $text;
4064         }
4065
4066         /**
4067          * Filter an output field through a Unicode armoring process if it is
4068          * going to an old browser with known broken Unicode editing issues.
4069          *
4070          * @param string $text
4071          * @return string
4072          */
4073         protected function safeUnicodeOutput( $text ) {
4074                 global $wgContLang;
4075                 $codedText = $wgContLang->recodeForEdit( $text );
4076                 return $this->checkUnicodeCompliantBrowser()
4077                         ? $codedText
4078                         : $this->makeSafe( $codedText );
4079         }
4080
4081         /**
4082          * A number of web browsers are known to corrupt non-ASCII characters
4083          * in a UTF-8 text editing environment. To protect against this,
4084          * detected browsers will be served an armored version of the text,
4085          * with non-ASCII chars converted to numeric HTML character references.
4086          *
4087          * Preexisting such character references will have a 0 added to them
4088          * to ensure that round-trips do not alter the original data.
4089          *
4090          * @param string $invalue
4091          * @return string
4092          */
4093         private function makeSafe( $invalue ) {
4094                 // Armor existing references for reversibility.
4095                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4096
4097                 $bytesleft = 0;
4098                 $result = "";
4099                 $working = 0;
4100                 $valueLength = strlen( $invalue );
4101                 for ( $i = 0; $i < $valueLength; $i++ ) {
4102                         $bytevalue = ord( $invalue[$i] );
4103                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4104                                 $result .= chr( $bytevalue );
4105                                 $bytesleft = 0;
4106                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4107                                 $working = $working << 6;
4108                                 $working += ( $bytevalue & 0x3F );
4109                                 $bytesleft--;
4110                                 if ( $bytesleft <= 0 ) {
4111                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4112                                 }
4113                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4114                                 $working = $bytevalue & 0x1F;
4115                                 $bytesleft = 1;
4116                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4117                                 $working = $bytevalue & 0x0F;
4118                                 $bytesleft = 2;
4119                         } else { // 1111 0xxx
4120                                 $working = $bytevalue & 0x07;
4121                                 $bytesleft = 3;
4122                         }
4123                 }
4124                 return $result;
4125         }
4126
4127         /**
4128          * Reverse the previously applied transliteration of non-ASCII characters
4129          * back to UTF-8. Used to protect data from corruption by broken web browsers
4130          * as listed in $wgBrowserBlackList.
4131          *
4132          * @param string $invalue
4133          * @return string
4134          */
4135         private function unmakeSafe( $invalue ) {
4136                 $result = "";
4137                 $valueLength = strlen( $invalue );
4138                 for ( $i = 0; $i < $valueLength; $i++ ) {
4139                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4140                                 $i += 3;
4141                                 $hexstring = "";
4142                                 do {
4143                                         $hexstring .= $invalue[$i];
4144                                         $i++;
4145                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4146
4147                                 // Do some sanity checks. These aren't needed for reversibility,
4148                                 // but should help keep the breakage down if the editor
4149                                 // breaks one of the entities whilst editing.
4150                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) && ( strlen( $hexstring ) <= 6 ) ) {
4151                                         $codepoint = hexdec( $hexstring );
4152                                         $result .= UtfNormal\Utils::codepointToUtf8( $codepoint );
4153                                 } else {
4154                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4155                                 }
4156                         } else {
4157                                 $result .= substr( $invalue, $i, 1 );
4158                         }
4159                 }
4160                 // reverse the transform that we made for reversibility reasons.
4161                 return strtr( $result, array( "&#x0" => "&#x" ) );
4162         }
4163 }