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