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