includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: can't parse content
 149          */
 150         const AS_PARSE_ERROR = 240;
 151
 152         /**
 153          * HTML id and name for the beginning of the edit form.
 154          */
 155         const EDITFORM_ID = 'editform';
 156
 157         /**
 158          * Prefix of key for cookie used to pass post-edit state.
 159          * The revision id edited is added after this
 160          */
 161         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 162
 163         /**
 164          * Duration of PostEdit cookie, in seconds.
 165          * The cookie will be removed instantly if the JavaScript runs.
 166          *
 167          * Otherwise, though, we don't want the cookies to accumulate.
 168          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 169          * limit of only 20 cookies per domain. This still applies at least to some
 170          * versions of IE without full updates:
 171          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 172          *
 173          * A value of 20 minutes should be enough to take into account slow loads and minor
 174          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 175          */
 176         const POST_EDIT_COOKIE_DURATION = 1200;
 177
 178         /** @var Article */
 179         public $mArticle;
 180
 181         /** @var Title */
 182         public $mTitle;
 183
 184         /** @var null|Title */
 185         private $mContextTitle = null;
 186
 187         /** @var string */
 188         public $action = 'submit';
 189
 190         /** @var bool */
 191         public $isConflict = false;
 192
 193         /** @var bool */
 194         public $isCssJsSubpage = false;
 195
 196         /** @var bool */
 197         public $isCssSubpage = false;
 198
 199         /** @var bool */
 200         public $isJsSubpage = false;
 201
 202         /** @var bool */
 203         public $isWrongCaseCssJsPage = false;
 204
 205         /** @var bool New page or new section */
 206         public $isNew = false;
 207
 208         /** @var bool */
 209         public $deletedSinceEdit;
 210
 211         /** @var string */
 212         public $formtype;
 213
 214         /** @var bool */
 215         public $firsttime;
 216
 217         /** @var bool|stdClass */
 218         public $lastDelete;
 219
 220         /** @var bool */
 221         public $mTokenOk = false;
 222
 223         /** @var bool */
 224         public $mTokenOkExceptSuffix = false;
 225
 226         /** @var bool */
 227         public $mTriedSave = false;
 228
 229         /** @var bool */
 230         public $incompleteForm = false;
 231
 232         /** @var bool */
 233         public $tooBig = false;
 234
 235         /** @var bool */
 236         public $kblength = false;
 237
 238         /** @var bool */
 239         public $missingComment = false;
 240
 241         /** @var bool */
 242         public $missingSummary = false;
 243
 244         /** @var bool */
 245         public $allowBlankSummary = false;
 246
 247         /** @var bool */
 248         protected $blankArticle = false;
 249
 250         /** @var bool */
 251         protected $allowBlankArticle = false;
 252
 253         /** @var string */
 254         public $autoSumm = '';
 255
 256         /** @var string */
 257         public $hookError = '';
 258
 259         /** @var ParserOutput */
 260         public $mParserOutput;
 261
 262         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 263         public $hasPresetSummary = false;
 264
 265         /** @var bool */
 266         public $mBaseRevision = false;
 267
 268         /** @var bool */
 269         public $mShowSummaryField = true;
 270
 271         # Form values
 272
 273         /** @var bool */
 274         public $save = false;
 275
 276         /** @var bool */
 277         public $preview = false;
 278
 279         /** @var bool */
 280         public $diff = false;
 281
 282         /** @var bool */
 283         public $minoredit = false;
 284
 285         /** @var bool */
 286         public $watchthis = false;
 287
 288         /** @var bool */
 289         public $recreate = false;
 290
 291         /** @var string */
 292         public $textbox1 = '';
 293
 294         /** @var string */
 295         public $textbox2 = '';
 296
 297         /** @var string */
 298         public $summary = '';
 299
 300         /** @var bool */
 301         public $nosummary = false;
 302
 303         /** @var string */
 304         public $edittime = '';
 305
 306         /** @var string */
 307         public $section = '';
 308
 309         /** @var string */
 310         public $sectiontitle = '';
 311
 312         /** @var string */
 313         public $starttime = '';
 314
 315         /** @var int */
 316         public $oldid = 0;
 317
 318         /** @var string */
 319         public $editintro = '';
 320
 321         /** @var null */
 322         public $scrolltop = null;
 323
 324         /** @var bool */
 325         public $bot = true;
 326
 327         /** @var null|string */
 328         public $contentModel = null;
 329
 330         /** @var null|string */
 331         public $contentFormat = null;
 332
 333         # Placeholders for text injection by hooks (must be HTML)
 334         # extensions should take care to _append_ to the present value
 335
 336         /** @var string Before even the preview */
 337         public $editFormPageTop = '';
 338         public $editFormTextTop = '';
 339         public $editFormTextBeforeContent = '';
 340         public $editFormTextAfterWarn = '';
 341         public $editFormTextAfterTools = '';
 342         public $editFormTextBottom = '';
 343         public $editFormTextAfterContent = '';
 344         public $previewTextAfterContent = '';
 345         public $mPreloadContent = null;
 346
 347         /* $didSave should be set to true whenever an article was successfully altered. */
 348         public $didSave = false;
 349         public $undidRev = 0;
 350
 351         public $suppressIntro = false;
 352
 353         /** @var bool Set to true to allow editing of non-text content types. */
 354         public $allowNonTextContent = false;
 355
 356         /** @var bool */
 357         protected $edit;
 358
 359         /** @var bool */
 360         public $live;
 361
 362         /**
 363          * @param Article $article
 364          */
 365         public function __construct( Article $article ) {
 366                 $this->mArticle = $article;
 367                 $this->mTitle = $article->getTitle();
 368
 369                 $this->contentModel = $this->mTitle->getContentModel();
 370
 371                 $handler = ContentHandler::getForModelID( $this->contentModel );
 372                 $this->contentFormat = $handler->getDefaultFormat();
 373         }
 374
 375         /**
 376          * @return Article
 377          */
 378         public function getArticle() {
 379                 return $this->mArticle;
 380         }
 381
 382         /**
 383          * @since 1.19
 384          * @return Title
 385          */
 386         public function getTitle() {
 387                 return $this->mTitle;
 388         }
 389
 390         /**
 391          * Set the context Title object
 392          *
 393          * @param Title|null $title Title object or null
 394          */
 395         public function setContextTitle( $title ) {
 396                 $this->mContextTitle = $title;
 397         }
 398
 399         /**
 400          * Get the context title object.
 401          * If not set, $wgTitle will be returned. This behavior might change in
 402          * the future to return $this->mTitle instead.
 403          *
 404          * @return Title
 405          */
 406         public function getContextTitle() {
 407                 if ( is_null( $this->mContextTitle ) ) {
 408                         global $wgTitle;
 409                         return $wgTitle;
 410                 } else {
 411                         return $this->mContextTitle;
 412                 }
 413         }
 414
 415         /**
 416          * Returns if the given content model is editable.
 417          *
 418          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 419          * @return bool
 420          * @throws MWException If $modelId has no known handler
 421          */
 422         public function isSupportedContentModel( $modelId ) {
 423                 return $this->allowNonTextContent ||
 424                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 425         }
 426
 427         function submit() {
 428                 $this->edit();
 429         }
 430
 431         /**
 432          * This is the function that gets called for "action=edit". It
 433          * sets up various member variables, then passes execution to
 434          * another function, usually showEditForm()
 435          *
 436          * The edit form is self-submitting, so that when things like
 437          * preview and edit conflicts occur, we get the same form back
 438          * with the extra stuff added.  Only when the final submission
 439          * is made and all is well do we actually save and redirect to
 440          * the newly-edited page.
 441          */
 442         function edit() {
 443                 global $wgOut, $wgRequest, $wgUser;
 444                 // Allow extensions to modify/prevent this form or submission
 445                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 446                         return;
 447                 }
 448
 449                 wfProfileIn( __METHOD__ );
 450                 wfDebug( __METHOD__ . ": enter\n" );
 451
 452                 // If they used redlink=1 and the page exists, redirect to the main article
 453                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 454                         $wgOut->redirect( $this->mTitle->getFullURL() );
 455                         wfProfileOut( __METHOD__ );
 456                         return;
 457                 }
 458
 459                 $this->importFormData( $wgRequest );
 460                 $this->firsttime = false;
 461
 462                 if ( $this->live ) {
 463                         $this->livePreview();
 464                         wfProfileOut( __METHOD__ );
 465                         return;
 466                 }
 467
 468                 if ( wfReadOnly() && $this->save ) {
 469                         // Force preview
 470                         $this->save = false;
 471                         $this->preview = true;
 472                 }
 473
 474                 if ( $this->save ) {
 475                         $this->formtype = 'save';
 476                 } elseif ( $this->preview ) {
 477                         $this->formtype = 'preview';
 478                 } elseif ( $this->diff ) {
 479                         $this->formtype = 'diff';
 480                 } else { # First time through
 481                         $this->firsttime = true;
 482                         if ( $this->previewOnOpen() ) {
 483                                 $this->formtype = 'preview';
 484                         } else {
 485                                 $this->formtype = 'initial';
 486                         }
 487                 }
 488
 489                 $permErrors = $this->getEditPermissionErrors();
 490                 if ( $permErrors ) {
 491                         wfDebug( __METHOD__ . ": User can't edit\n" );
 492                         // Auto-block user's IP if the account was "hard" blocked
 493                         $wgUser->spreadAnyEditBlock();
 494
 495                         $this->displayPermissionsError( $permErrors );
 496
 497                         wfProfileOut( __METHOD__ );
 498                         return;
 499                 }
 500
 501                 wfProfileIn( __METHOD__ . "-business-end" );
 502
 503                 $this->isConflict = false;
 504                 // css / js subpages of user pages get a special treatment
 505                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 506                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 507                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 508                 // @todo FIXME: Silly assignment.
 509                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 510
 511                 # Show applicable editing introductions
 512                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 513                         $this->showIntro();
 514                 }
 515
 516                 # Attempt submission here.  This will check for edit conflicts,
 517                 # and redundantly check for locked database, blocked IPs, etc.
 518                 # that edit() already checked just in case someone tries to sneak
 519                 # in the back door with a hand-edited submission URL.
 520
 521                 if ( 'save' == $this->formtype ) {
 522                         if ( !$this->attemptSave() ) {
 523                                 wfProfileOut( __METHOD__ . "-business-end" );
 524                                 wfProfileOut( __METHOD__ );
 525                                 return;
 526                         }
 527                 }
 528
 529                 # First time through: get contents, set time for conflict
 530                 # checking, etc.
 531                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 532                         if ( $this->initialiseForm() === false ) {
 533                                 $this->noSuchSectionPage();
 534                                 wfProfileOut( __METHOD__ . "-business-end" );
 535                                 wfProfileOut( __METHOD__ );
 536                                 return;
 537                         }
 538
 539                         if ( !$this->mTitle->getArticleID() ) {
 540                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 541                         } else {
 542                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 543                         }
 544
 545                 }
 546
 547                 $this->showEditForm();
 548                 wfProfileOut( __METHOD__ . "-business-end" );
 549                 wfProfileOut( __METHOD__ );
 550         }
 551
 552         /**
 553          * @return array
 554          */
 555         protected function getEditPermissionErrors() {
 556                 global $wgUser;
 557                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 558                 # Can this title be created?
 559                 if ( !$this->mTitle->exists() ) {
 560                         $permErrors = array_merge( $permErrors,
 561                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 562                 }
 563                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 564                 $remove = array();
 565                 foreach ( $permErrors as $error ) {
 566                         if ( ( $this->preview || $this->diff )
 567                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 568                         ) {
 569                                 $remove[] = $error;
 570                         }
 571                 }
 572                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 573                 return $permErrors;
 574         }
 575
 576         /**
 577          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 578          * but with the following differences:
 579          * - If redlink=1, the user will be redirected to the page
 580          * - If there is content to display or the error occurs while either saving,
 581          *   previewing or showing the difference, it will be a
 582          *   "View source for ..." page displaying the source code after the error message.
 583          *
 584          * @since 1.19
 585          * @param array $permErrors Array of permissions errors, as returned by
 586          *    Title::getUserPermissionsErrors().
 587          * @throws PermissionsError
 588          */
 589         protected function displayPermissionsError( array $permErrors ) {
 590                 global $wgRequest, $wgOut;
 591
 592                 if ( $wgRequest->getBool( 'redlink' ) ) {
 593                         // The edit page was reached via a red link.
 594                         // Redirect to the article page and let them click the edit tab if
 595                         // they really want a permission error.
 596                         $wgOut->redirect( $this->mTitle->getFullURL() );
 597                         return;
 598                 }
 599
 600                 $content = $this->getContentObject();
 601
 602                 # Use the normal message if there's nothing to display
 603                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 604                         $action = $this->mTitle->exists() ? 'edit' :
 605                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 606                         throw new PermissionsError( $action, $permErrors );
 607                 }
 608
 609                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 610
 611                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 612                 $wgOut->setPageTitle( wfMessage(
 613                         'viewsource-title',
 614                         $this->getContextTitle()->getPrefixedText()
 615                 ) );
 616                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 617                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 618                 $wgOut->addHTML( "<hr />\n" );
 619
 620                 # If the user made changes, preserve them when showing the markup
 621                 # (This happens when a user is blocked during edit, for instance)
 622                 if ( !$this->firsttime ) {
 623                         $text = $this->textbox1;
 624                         $wgOut->addWikiMsg( 'viewyourtext' );
 625                 } else {
 626                         $text = $this->toEditText( $content );
 627                         $wgOut->addWikiMsg( 'viewsourcetext' );
 628                 }
 629
 630                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 631
 632                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 633                         Linker::formatTemplates( $this->getTemplates() ) ) );
 634
 635                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 636
 637                 if ( $this->mTitle->exists() ) {
 638                         $wgOut->returnToMain( null, $this->mTitle );
 639                 }
 640         }
 641
 642         /**
 643          * Should we show a preview when the edit form is first shown?
 644          *
 645          * @return bool
 646          */
 647         protected function previewOnOpen() {
 648                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 649                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 650                         // Explicit override from request
 651                         return true;
 652                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 653                         // Explicit override from request
 654                         return false;
 655                 } elseif ( $this->section == 'new' ) {
 656                         // Nothing *to* preview for new sections
 657                         return false;
 658                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 659                         && $wgUser->getOption( 'previewonfirst' )
 660                 ) {
 661                         // Standard preference behavior
 662                         return true;
 663                 } elseif ( !$this->mTitle->exists()
 664                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 665                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 666                 ) {
 667                         // Categories are special
 668                         return true;
 669                 } else {
 670                         return false;
 671                 }
 672         }
 673
 674         /**
 675          * Checks whether the user entered a skin name in uppercase,
 676          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 677          *
 678          * @return bool
 679          */
 680         protected function isWrongCaseCssJsPage() {
 681                 if ( $this->mTitle->isCssJsSubpage() ) {
 682                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 683                         $skins = array_merge(
 684                                 array_keys( Skin::getSkinNames() ),
 685                                 array( 'common' )
 686                         );
 687                         return !in_array( $name, $skins )
 688                                 && in_array( strtolower( $name ), $skins );
 689                 } else {
 690                         return false;
 691                 }
 692         }
 693
 694         /**
 695          * Returns whether section editing is supported for the current page.
 696          * Subclasses may override this to replace the default behavior, which is
 697          * to check ContentHandler::supportsSections.
 698          *
 699          * @return bool True if this edit page supports sections, false otherwise.
 700          */
 701         protected function isSectionEditSupported() {
 702                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 703                 return $contentHandler->supportsSections();
 704         }
 705
 706         /**
 707          * This function collects the form data and uses it to populate various member variables.
 708          * @param WebRequest $request
 709          * @throws ErrorPageError
 710          */
 711         function importFormData( &$request ) {
 712                 global $wgContLang, $wgUser;
 713
 714                 wfProfileIn( __METHOD__ );
 715
 716                 # Section edit can come from either the form or a link
 717                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 718
 719                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 720                         wfProfileOut( __METHOD__ );
 721                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 722                 }
 723
 724                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 725
 726                 if ( $request->wasPosted() ) {
 727                         # These fields need to be checked for encoding.
 728                         # Also remove trailing whitespace, but don't remove _initial_
 729                         # whitespace from the text boxes. This may be significant formatting.
 730                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 731                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 732                                 // Skip this if wpTextbox2 has input, it indicates that we came
 733                                 // from a conflict page with raw page text, not a custom form
 734                                 // modified by subclasses
 735                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 736                                 $textbox1 = $this->importContentFormData( $request );
 737                                 if ( $textbox1 !== null ) {
 738                                         $this->textbox1 = $textbox1;
 739                                 }
 740
 741                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 742                         }
 743
 744                         # Truncate for whole multibyte characters
 745                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 746
 747                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 748                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 749                         # section titles.
 750                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 751
 752                         # Treat sectiontitle the same way as summary.
 753                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 754                         # currently doing double duty as both edit summary and section title. Right now this
 755                         # is just to allow API edits to work around this limitation, but this should be
 756                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 757                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 758                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 759
 760                         $this->edittime = $request->getVal( 'wpEdittime' );
 761                         $this->starttime = $request->getVal( 'wpStarttime' );
 762
 763                         $undidRev = $request->getInt( 'wpUndidRevision' );
 764                         if ( $undidRev ) {
 765                                 $this->undidRev = $undidRev;
 766                         }
 767
 768                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 769
 770                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 771                                 // wpTextbox1 field is missing, possibly due to being "too big"
 772                                 // according to some filter rules such as Suhosin's setting for
 773                                 // suhosin.request.max_value_length (d'oh)
 774                                 $this->incompleteForm = true;
 775                         } else {
 776                                 // If we receive the last parameter of the request, we can fairly
 777                                 // claim the POST request has not been truncated.
 778
 779                                 // TODO: softened the check for cutover.  Once we determine
 780                                 // that it is safe, we should complete the transition by
 781                                 // removing the "edittime" clause.
 782                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' ) && is_null( $this->edittime ) );
 783                         }
 784                         if ( $this->incompleteForm ) {
 785                                 # If the form is incomplete, force to preview.
 786                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 787                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 788                                 $this->preview = true;
 789                         } else {
 790                                 /* Fallback for live preview */
 791                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 792                                 $this->diff = $request->getCheck( 'wpDiff' );
 793
 794                                 // Remember whether a save was requested, so we can indicate
 795                                 // if we forced preview due to session failure.
 796                                 $this->mTriedSave = !$this->preview;
 797
 798                                 if ( $this->tokenOk( $request ) ) {
 799                                         # Some browsers will not report any submit button
 800                                         # if the user hits enter in the comment box.
 801                                         # The unmarked state will be assumed to be a save,
 802                                         # if the form seems otherwise complete.
 803                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 804                                 } elseif ( $this->diff ) {
 805                                         # Failed token check, but only requested "Show Changes".
 806                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 807                                 } else {
 808                                         # Page might be a hack attempt posted from
 809                                         # an external site. Preview instead of saving.
 810                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 811                                         $this->preview = true;
 812                                 }
 813                         }
 814                         $this->save = !$this->preview && !$this->diff;
 815                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 816                                 $this->edittime = null;
 817                         }
 818
 819                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 820                                 $this->starttime = null;
 821                         }
 822
 823                         $this->recreate = $request->getCheck( 'wpRecreate' );
 824
 825                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 826                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 827
 828                         # Don't force edit summaries when a user is editing their own user or talk page
 829                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 830                                 && $this->mTitle->getText() == $wgUser->getName()
 831                         ) {
 832                                 $this->allowBlankSummary = true;
 833                         } else {
 834                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 835                                         || !$wgUser->getOption( 'forceeditsummary' );
 836                         }
 837
 838                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 839
 840                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 841                 } else {
 842                         # Not a posted form? Start with nothing.
 843                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 844                         $this->textbox1 = '';
 845                         $this->summary = '';
 846                         $this->sectiontitle = '';
 847                         $this->edittime = '';
 848                         $this->starttime = wfTimestampNow();
 849                         $this->edit = false;
 850                         $this->preview = false;
 851                         $this->save = false;
 852                         $this->diff = false;
 853                         $this->minoredit = false;
 854                         // Watch may be overridden by request parameters
 855                         $this->watchthis = $request->getBool( 'watchthis', false );
 856                         $this->recreate = false;
 857
 858                         // When creating a new section, we can preload a section title by passing it as the
 859                         // preloadtitle parameter in the URL (Bug 13100)
 860                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 861                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 862                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 863                                 $this->summary = $request->getVal( 'preloadtitle' );
 864                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 865                                 $this->summary = $request->getText( 'summary' );
 866                                 if ( $this->summary !== '' ) {
 867                                         $this->hasPresetSummary = true;
 868                                 }
 869                         }
 870
 871                         if ( $request->getVal( 'minor' ) ) {
 872                                 $this->minoredit = true;
 873                         }
 874                 }
 875
 876                 $this->oldid = $request->getInt( 'oldid' );
 877
 878                 $this->bot = $request->getBool( 'bot', true );
 879                 $this->nosummary = $request->getBool( 'nosummary' );
 880
 881                 // May be overridden by revision.
 882                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 883                 // May be overridden by revision.
 884                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 885
 886                 if ( !ContentHandler::getForModelID( $this->contentModel )
 887                         ->isSupportedFormat( $this->contentFormat )
 888                 ) {
 889                         throw new ErrorPageError(
 890                                 'editpage-notsupportedcontentformat-title',
 891                                 'editpage-notsupportedcontentformat-text',
 892                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 893                         );
 894                 }
 895
 896                 /**
 897                  * @todo Check if the desired model is allowed in this namespace, and if
 898                  *   a transition from the page's current model to the new model is
 899                  *   allowed.
 900                  */
 901
 902                 $this->live = $request->getCheck( 'live' );
 903                 $this->editintro = $request->getText( 'editintro',
 904                         // Custom edit intro for new sections
 905                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 906
 907                 // Allow extensions to modify form data
 908                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 909
 910                 wfProfileOut( __METHOD__ );
 911         }
 912
 913         /**
 914          * Subpage overridable method for extracting the page content data from the
 915          * posted form to be placed in $this->textbox1, if using customized input
 916          * this method should be overridden and return the page text that will be used
 917          * for saving, preview parsing and so on...
 918          *
 919          * @param WebRequest $request
 920          */
 921         protected function importContentFormData( &$request ) {
 922                 return; // Don't do anything, EditPage already extracted wpTextbox1
 923         }
 924
 925         /**
 926          * Initialise form fields in the object
 927          * Called on the first invocation, e.g. when a user clicks an edit link
 928          * @return bool If the requested section is valid
 929          */
 930         function initialiseForm() {
 931                 global $wgUser;
 932                 $this->edittime = $this->mArticle->getTimestamp();
 933
 934                 $content = $this->getContentObject( false ); #TODO: track content object?!
 935                 if ( $content === false ) {
 936                         return false;
 937                 }
 938                 $this->textbox1 = $this->toEditText( $content );
 939
 940                 // activate checkboxes if user wants them to be always active
 941                 # Sort out the "watch" checkbox
 942                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 943                         # Watch all edits
 944                         $this->watchthis = true;
 945                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 946                         # Watch creations
 947                         $this->watchthis = true;
 948                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 949                         # Already watched
 950                         $this->watchthis = true;
 951                 }
 952                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 953                         $this->minoredit = true;
 954                 }
 955                 if ( $this->textbox1 === false ) {
 956                         return false;
 957                 }
 958                 return true;
 959         }
 960
 961         /**
 962          * @param Content|null $def_content The default value to return
 963          *
 964          * @return Content|null Content on success, $def_content for invalid sections
 965          *
 966          * @since 1.21
 967          */
 968         protected function getContentObject( $def_content = null ) {
 969                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 970
 971                 wfProfileIn( __METHOD__ );
 972
 973                 $content = false;
 974
 975                 // For message page not locally set, use the i18n message.
 976                 // For other non-existent articles, use preload text if any.
 977                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 978                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 979                                 # If this is a system message, get the default text.
 980                                 $msg = $this->mTitle->getDefaultMessageText();
 981
 982                                 $content = $this->toEditContent( $msg );
 983                         }
 984                         if ( $content === false ) {
 985                                 # If requested, preload some text.
 986                                 $preload = $wgRequest->getVal( 'preload',
 987                                         // Custom preload text for new sections
 988                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 989                                 $params = $wgRequest->getArray( 'preloadparams', array() );
 990
 991                                 $content = $this->getPreloadedContent( $preload, $params );
 992                         }
 993                 // For existing pages, get text based on "undo" or section parameters.
 994                 } else {
 995                         if ( $this->section != '' ) {
 996                                 // Get section edit text (returns $def_text for invalid sections)
 997                                 $orig = $this->getOriginalContent( $wgUser );
 998                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 999
1000                                 if ( !$content ) {
1001                                         $content = $def_content;
1002                                 }
1003                         } else {
1004                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1005                                 $undo = $wgRequest->getInt( 'undo' );
1006
1007                                 if ( $undo > 0 && $undoafter > 0 ) {
1008
1009                                         $undorev = Revision::newFromId( $undo );
1010                                         $oldrev = Revision::newFromId( $undoafter );
1011
1012                                         # Sanity check, make sure it's the right page,
1013                                         # the revisions exist and they were not deleted.
1014                                         # Otherwise, $content will be left as-is.
1015                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1016                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1017                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1018
1019                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1020
1021                                                 if ( $content === false ) {
1022                                                         # Warn the user that something went wrong
1023                                                         $undoMsg = 'failure';
1024                                                 } else {
1025                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1026                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1027                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1028
1029                                                         if ( $newContent->equals( $oldContent ) ) {
1030                                                                 # Tell the user that the undo results in no change,
1031                                                                 # i.e. the revisions were already undone.
1032                                                                 $undoMsg = 'nochange';
1033                                                                 $content = false;
1034                                                         } else {
1035                                                                 # Inform the user of our success and set an automatic edit summary
1036                                                                 $undoMsg = 'success';
1037
1038                                                                 # If we just undid one rev, use an autosummary
1039                                                                 $firstrev = $oldrev->getNext();
1040                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1041                                                                         $userText = $undorev->getUserText();
1042                                                                         if ( $userText === '' ) {
1043                                                                                 $undoSummary = wfMessage(
1044                                                                                         'undo-summary-username-hidden',
1045                                                                                         $undo
1046                                                                                 )->inContentLanguage()->text();
1047                                                                         } else {
1048                                                                                 $undoSummary = wfMessage(
1049                                                                                         'undo-summary',
1050                                                                                         $undo,
1051                                                                                         $userText
1052                                                                                 )->inContentLanguage()->text();
1053                                                                         }
1054                                                                         if ( $this->summary === '' ) {
1055                                                                                 $this->summary = $undoSummary;
1056                                                                         } else {
1057                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1058                                                                                         ->inContentLanguage()->text() . $this->summary;
1059                                                                         }
1060                                                                         $this->undidRev = $undo;
1061                                                                 }
1062                                                                 $this->formtype = 'diff';
1063                                                         }
1064                                                 }
1065                                         } else {
1066                                                 // Failed basic sanity checks.
1067                                                 // Older revisions may have been removed since the link
1068                                                 // was created, or we may simply have got bogus input.
1069                                                 $undoMsg = 'norev';
1070                                         }
1071
1072                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1073                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1074                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1075                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1076                                 }
1077
1078                                 if ( $content === false ) {
1079                                         $content = $this->getOriginalContent( $wgUser );
1080                                 }
1081                         }
1082                 }
1083
1084                 wfProfileOut( __METHOD__ );
1085                 return $content;
1086         }
1087
1088         /**
1089          * Get the content of the wanted revision, without section extraction.
1090          *
1091          * The result of this function can be used to compare user's input with
1092          * section replaced in its context (using WikiPage::replaceSection())
1093          * to the original text of the edit.
1094          *
1095          * This differs from Article::getContent() that when a missing revision is
1096          * encountered the result will be null and not the
1097          * 'missing-revision' message.
1098          *
1099          * @since 1.19
1100          * @param User $user The user to get the revision for
1101          * @return Content|null
1102          */
1103         private function getOriginalContent( User $user ) {
1104                 if ( $this->section == 'new' ) {
1105                         return $this->getCurrentContent();
1106                 }
1107                 $revision = $this->mArticle->getRevisionFetched();
1108                 if ( $revision === null ) {
1109                         if ( !$this->contentModel ) {
1110                                 $this->contentModel = $this->getTitle()->getContentModel();
1111                         }
1112                         $handler = ContentHandler::getForModelID( $this->contentModel );
1113
1114                         return $handler->makeEmptyContent();
1115                 }
1116                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1117                 return $content;
1118         }
1119
1120         /**
1121          * Get the current content of the page. This is basically similar to
1122          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1123          * content object is returned instead of null.
1124          *
1125          * @since 1.21
1126          * @return Content
1127          */
1128         protected function getCurrentContent() {
1129                 $rev = $this->mArticle->getRevision();
1130                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1131
1132                 if ( $content === false || $content === null ) {
1133                         if ( !$this->contentModel ) {
1134                                 $this->contentModel = $this->getTitle()->getContentModel();
1135                         }
1136                         $handler = ContentHandler::getForModelID( $this->contentModel );
1137
1138                         return $handler->makeEmptyContent();
1139                 } else {
1140                         # nasty side-effect, but needed for consistency
1141                         $this->contentModel = $rev->getContentModel();
1142                         $this->contentFormat = $rev->getContentFormat();
1143
1144                         return $content;
1145                 }
1146         }
1147
1148         /**
1149          * Use this method before edit() to preload some content into the edit box
1150          *
1151          * @param Content $content
1152          *
1153          * @since 1.21
1154          */
1155         public function setPreloadedContent( Content $content ) {
1156                 $this->mPreloadContent = $content;
1157         }
1158
1159         /**
1160          * Get the contents to be preloaded into the box, either set by
1161          * an earlier setPreloadText() or by loading the given page.
1162          *
1163          * @param string $preload Representing the title to preload from.
1164          * @param array $params Parameters to use (interface-message style) in the preloaded text
1165          *
1166          * @return Content
1167          *
1168          * @since 1.21
1169          */
1170         protected function getPreloadedContent( $preload, $params = array() ) {
1171                 global $wgUser;
1172
1173                 if ( !empty( $this->mPreloadContent ) ) {
1174                         return $this->mPreloadContent;
1175                 }
1176
1177                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1178
1179                 if ( $preload === '' ) {
1180                         return $handler->makeEmptyContent();
1181                 }
1182
1183                 $title = Title::newFromText( $preload );
1184                 # Check for existence to avoid getting MediaWiki:Noarticletext
1185                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1186                         //TODO: somehow show a warning to the user!
1187                         return $handler->makeEmptyContent();
1188                 }
1189
1190                 $page = WikiPage::factory( $title );
1191                 if ( $page->isRedirect() ) {
1192                         $title = $page->getRedirectTarget();
1193                         # Same as before
1194                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1195                                 //TODO: somehow show a warning to the user!
1196                                 return $handler->makeEmptyContent();
1197                         }
1198                         $page = WikiPage::factory( $title );
1199                 }
1200
1201                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1202                 $content = $page->getContent( Revision::RAW );
1203
1204                 if ( !$content ) {
1205                         //TODO: somehow show a warning to the user!
1206                         return $handler->makeEmptyContent();
1207                 }
1208
1209                 if ( $content->getModel() !== $handler->getModelID() ) {
1210                         $converted = $content->convert( $handler->getModelID() );
1211
1212                         if ( !$converted ) {
1213                                 //TODO: somehow show a warning to the user!
1214                                 wfDebug( "Attempt to preload incompatible content: "
1215                                                 . "can't convert " . $content->getModel()
1216                                                 . " to " . $handler->getModelID() );
1217
1218                                 return $handler->makeEmptyContent();
1219                         }
1220
1221                         $content = $converted;
1222                 }
1223
1224                 return $content->preloadTransform( $title, $parserOptions, $params );
1225         }
1226
1227         /**
1228          * Make sure the form isn't faking a user's credentials.
1229          *
1230          * @param WebRequest $request
1231          * @return bool
1232          * @private
1233          */
1234         function tokenOk( &$request ) {
1235                 global $wgUser;
1236                 $token = $request->getVal( 'wpEditToken' );
1237                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1238                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1239                 return $this->mTokenOk;
1240         }
1241
1242         /**
1243          * Sets post-edit cookie indicating the user just saved a particular revision.
1244          *
1245          * This uses a temporary cookie for each revision ID so separate saves will never
1246          * interfere with each other.
1247          *
1248          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1249          * the redirect.  It must be clearable by JavaScript code, so it must not be
1250          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1251          * variable.
1252          *
1253          * If the variable were set on the server, it would be cached, which is unwanted
1254          * since the post-edit state should only apply to the load right after the save.
1255          *
1256          * @param int $statusValue The status value (to check for new article status)
1257          */
1258         protected function setPostEditCookie( $statusValue ) {
1259                 $revisionId = $this->mArticle->getLatest();
1260                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1261
1262                 $val = 'saved';
1263                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1264                         $val = 'created';
1265                 } elseif ( $this->oldid ) {
1266                         $val = 'restored';
1267                 }
1268
1269                 $response = RequestContext::getMain()->getRequest()->response();
1270                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1271                         'httpOnly' => false,
1272                 ) );
1273         }
1274
1275         /**
1276          * Attempt submission
1277          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1278          * @return bool False if output is done, true if the rest of the form should be displayed
1279          */
1280         public function attemptSave() {
1281                 global $wgUser;
1282
1283                 $resultDetails = false;
1284                 # Allow bots to exempt some edits from bot flagging
1285                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1286                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1287
1288                 return $this->handleStatus( $status, $resultDetails );
1289         }
1290
1291         /**
1292          * Handle status, such as after attempt save
1293          *
1294          * @param Status $status
1295          * @param array|bool $resultDetails
1296          *
1297          * @throws ErrorPageError
1298          * @return bool False, if output is done, true if rest of the form should be displayed
1299          */
1300         private function handleStatus( Status $status, $resultDetails ) {
1301                 global $wgUser, $wgOut;
1302
1303                 /**
1304                  * @todo FIXME: once the interface for internalAttemptSave() is made
1305                  *   nicer, this should use the message in $status
1306                  */
1307                 if ( $status->value == self::AS_SUCCESS_UPDATE
1308                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1309                 ) {
1310                         $this->didSave = true;
1311                         if ( !$resultDetails['nullEdit'] ) {
1312                                 $this->setPostEditCookie( $status->value );
1313                         }
1314                 }
1315
1316                 switch ( $status->value ) {
1317                         case self::AS_HOOK_ERROR_EXPECTED:
1318                         case self::AS_CONTENT_TOO_BIG:
1319                         case self::AS_ARTICLE_WAS_DELETED:
1320                         case self::AS_CONFLICT_DETECTED:
1321                         case self::AS_SUMMARY_NEEDED:
1322                         case self::AS_TEXTBOX_EMPTY:
1323                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1324                         case self::AS_END:
1325                         case self::AS_BLANK_ARTICLE:
1326                                 return true;
1327
1328                         case self::AS_HOOK_ERROR:
1329                                 return false;
1330
1331                         case self::AS_PARSE_ERROR:
1332                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1333                                 return true;
1334
1335                         case self::AS_SUCCESS_NEW_ARTICLE:
1336                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1337                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1338                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1339                                 return false;
1340
1341                         case self::AS_SUCCESS_UPDATE:
1342                                 $extraQuery = '';
1343                                 $sectionanchor = $resultDetails['sectionanchor'];
1344
1345                                 // Give extensions a chance to modify URL query on update
1346                                 wfRunHooks(
1347                                         'ArticleUpdateBeforeRedirect',
1348                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1349                                 );
1350
1351                                 if ( $resultDetails['redirect'] ) {
1352                                         if ( $extraQuery == '' ) {
1353                                                 $extraQuery = 'redirect=no';
1354                                         } else {
1355                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1356                                         }
1357                                 }
1358                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1359                                 return false;
1360
1361                         case self::AS_SPAM_ERROR:
1362                                 $this->spamPageWithContent( $resultDetails['spam'] );
1363                                 return false;
1364
1365                         case self::AS_BLOCKED_PAGE_FOR_USER:
1366                                 throw new UserBlockedError( $wgUser->getBlock() );
1367
1368                         case self::AS_IMAGE_REDIRECT_ANON:
1369                         case self::AS_IMAGE_REDIRECT_LOGGED:
1370                                 throw new PermissionsError( 'upload' );
1371
1372                         case self::AS_READ_ONLY_PAGE_ANON:
1373                         case self::AS_READ_ONLY_PAGE_LOGGED:
1374                                 throw new PermissionsError( 'edit' );
1375
1376                         case self::AS_READ_ONLY_PAGE:
1377                                 throw new ReadOnlyError;
1378
1379                         case self::AS_RATE_LIMITED:
1380                                 throw new ThrottledError();
1381
1382                         case self::AS_NO_CREATE_PERMISSION:
1383                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1384                                 throw new PermissionsError( $permission );
1385
1386                         default:
1387                                 // We don't recognize $status->value. The only way that can happen
1388                                 // is if an extension hook aborted from inside ArticleSave.
1389                                 // Render the status object into $this->hookError
1390                                 // FIXME this sucks, we should just use the Status object throughout
1391                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1392                                         '</div>';
1393                                 return true;
1394                 }
1395         }
1396
1397         /**
1398          * Run hooks that can filter edits just before they get saved.
1399          *
1400          * @param Content $content The Content to filter.
1401          * @param Status $status For reporting the outcome to the caller
1402          * @param User $user The user performing the edit
1403          *
1404          * @return bool
1405          */
1406         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1407                 // Run old style post-section-merge edit filter
1408                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1409                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1410
1411                         # Error messages etc. could be handled within the hook...
1412                         $status->fatal( 'hookaborted' );
1413                         $status->value = self::AS_HOOK_ERROR;
1414                         return false;
1415                 } elseif ( $this->hookError != '' ) {
1416                         # ...or the hook could be expecting us to produce an error
1417                         $status->fatal( 'hookaborted' );
1418                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1419                         return false;
1420                 }
1421
1422                 // Run new style post-section-merge edit filter
1423                 if ( !wfRunHooks( 'EditFilterMergedContent',
1424                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1425                                 $user, $this->minoredit ) ) ) {
1426
1427                         # Error messages etc. could be handled within the hook...
1428                         // XXX: $status->value may already be something informative...
1429                         $this->hookError = $status->getWikiText();
1430                         $status->fatal( 'hookaborted' );
1431                         $status->value = self::AS_HOOK_ERROR;
1432                         return false;
1433                 } elseif ( !$status->isOK() ) {
1434                         # ...or the hook could be expecting us to produce an error
1435                         // FIXME this sucks, we should just use the Status object throughout
1436                         $this->hookError = $status->getWikiText();
1437                         $status->fatal( 'hookaborted' );
1438                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1439                         return false;
1440                 }
1441
1442                 return true;
1443         }
1444
1445         /**
1446          * Return the summary to be used for a new section.
1447          *
1448          * @param string $sectionanchor Set to the section anchor text
1449          * @return string
1450          */
1451         private function newSectionSummary( &$sectionanchor = null ) {
1452                 global $wgParser;
1453
1454                 if ( $this->sectiontitle !== '' ) {
1455                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1456                         // If no edit summary was specified, create one automatically from the section
1457                         // title and have it link to the new section. Otherwise, respect the summary as
1458                         // passed.
1459                         if ( $this->summary === '' ) {
1460                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1461                                 return wfMessage( 'newsectionsummary' )
1462                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1463                         }
1464                 } elseif ( $this->summary !== '' ) {
1465                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1466                         # This is a new section, so create a link to the new section
1467                         # in the revision summary.
1468                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1469                         return wfMessage( 'newsectionsummary' )
1470                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1471                 }
1472                 return $this->summary;
1473         }
1474
1475         /**
1476          * Attempt submission (no UI)
1477          *
1478          * @param array $result Array to add statuses to, currently with the
1479          *   possible keys:
1480          *   - spam (string): Spam string from content if any spam is detected by
1481          *     matchSpamRegex.
1482          *   - sectionanchor (string): Section anchor for a section save.
1483          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1484          *     false otherwise.
1485          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1486          *     revision is a redirect.
1487          * @param bool $bot True if edit is being made under the bot right.
1488          *
1489          * @return Status Status object, possibly with a message, but always with
1490          *   one of the AS_* constants in $status->value,
1491          *
1492          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1493          *   various error display idiosyncrasies. There are also lots of cases
1494          *   where error metadata is set in the object and retrieved later instead
1495          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1496          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1497          * time.
1498          */
1499         function internalAttemptSave( &$result, $bot = false ) {
1500                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1501
1502                 $status = Status::newGood();
1503
1504                 wfProfileIn( __METHOD__ );
1505                 wfProfileIn( __METHOD__ . '-checks' );
1506
1507                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1508                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1509                         $status->fatal( 'hookaborted' );
1510                         $status->value = self::AS_HOOK_ERROR;
1511                         wfProfileOut( __METHOD__ . '-checks' );
1512                         wfProfileOut( __METHOD__ );
1513                         return $status;
1514                 }
1515
1516                 $spam = $wgRequest->getText( 'wpAntispam' );
1517                 if ( $spam !== '' ) {
1518                         wfDebugLog(
1519                                 'SimpleAntiSpam',
1520                                 $wgUser->getName() .
1521                                 ' editing "' .
1522                                 $this->mTitle->getPrefixedText() .
1523                                 '" submitted bogus field "' .
1524                                 $spam .
1525                                 '"'
1526                         );
1527                         $status->fatal( 'spamprotectionmatch', false );
1528                         $status->value = self::AS_SPAM_ERROR;
1529                         wfProfileOut( __METHOD__ . '-checks' );
1530                         wfProfileOut( __METHOD__ );
1531                         return $status;
1532                 }
1533
1534                 try {
1535                         # Construct Content object
1536                         $textbox_content = $this->toEditContent( $this->textbox1 );
1537                 } catch ( MWContentSerializationException $ex ) {
1538                         $status->fatal(
1539                                 'content-failed-to-parse',
1540                                 $this->contentModel,
1541                                 $this->contentFormat,
1542                                 $ex->getMessage()
1543                         );
1544                         $status->value = self::AS_PARSE_ERROR;
1545                         wfProfileOut( __METHOD__ . '-checks' );
1546                         wfProfileOut( __METHOD__ );
1547                         return $status;
1548                 }
1549
1550                 # Check image redirect
1551                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1552                         $textbox_content->isRedirect() &&
1553                         !$wgUser->isAllowed( 'upload' )
1554                 ) {
1555                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1556                                 $status->setResult( false, $code );
1557
1558                                 wfProfileOut( __METHOD__ . '-checks' );
1559                                 wfProfileOut( __METHOD__ );
1560
1561                                 return $status;
1562                 }
1563
1564                 # Check for spam
1565                 $match = self::matchSummarySpamRegex( $this->summary );
1566                 if ( $match === false && $this->section == 'new' ) {
1567                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1568                         # regular summaries, it is added to the actual wikitext.
1569                         if ( $this->sectiontitle !== '' ) {
1570                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1571                                 $match = self::matchSpamRegex( $this->sectiontitle );
1572                         } else {
1573                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1574                                 # is used with the 'summary' parameter.
1575                                 $match = self::matchSpamRegex( $this->summary );
1576                         }
1577                 }
1578                 if ( $match === false ) {
1579                         $match = self::matchSpamRegex( $this->textbox1 );
1580                 }
1581                 if ( $match !== false ) {
1582                         $result['spam'] = $match;
1583                         $ip = $wgRequest->getIP();
1584                         $pdbk = $this->mTitle->getPrefixedDBkey();
1585                         $match = str_replace( "\n", '', $match );
1586                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1587                         $status->fatal( 'spamprotectionmatch', $match );
1588                         $status->value = self::AS_SPAM_ERROR;
1589                         wfProfileOut( __METHOD__ . '-checks' );
1590                         wfProfileOut( __METHOD__ );
1591                         return $status;
1592                 }
1593                 if ( !wfRunHooks(
1594                         'EditFilter',
1595                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1596                 ) {
1597                         # Error messages etc. could be handled within the hook...
1598                         $status->fatal( 'hookaborted' );
1599                         $status->value = self::AS_HOOK_ERROR;
1600                         wfProfileOut( __METHOD__ . '-checks' );
1601                         wfProfileOut( __METHOD__ );
1602                         return $status;
1603                 } elseif ( $this->hookError != '' ) {
1604                         # ...or the hook could be expecting us to produce an error
1605                         $status->fatal( 'hookaborted' );
1606                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1607                         wfProfileOut( __METHOD__ . '-checks' );
1608                         wfProfileOut( __METHOD__ );
1609                         return $status;
1610                 }
1611
1612                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1613                         // Auto-block user's IP if the account was "hard" blocked
1614                         $wgUser->spreadAnyEditBlock();
1615                         # Check block state against master, thus 'false'.
1616                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1617                         wfProfileOut( __METHOD__ . '-checks' );
1618                         wfProfileOut( __METHOD__ );
1619                         return $status;
1620                 }
1621
1622                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1623                 if ( $this->kblength > $wgMaxArticleSize ) {
1624                         // Error will be displayed by showEditForm()
1625                         $this->tooBig = true;
1626                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1627                         wfProfileOut( __METHOD__ . '-checks' );
1628                         wfProfileOut( __METHOD__ );
1629                         return $status;
1630                 }
1631
1632                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1633                         if ( $wgUser->isAnon() ) {
1634                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1635                                 wfProfileOut( __METHOD__ . '-checks' );
1636                                 wfProfileOut( __METHOD__ );
1637                                 return $status;
1638                         } else {
1639                                 $status->fatal( 'readonlytext' );
1640                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1641                                 wfProfileOut( __METHOD__ . '-checks' );
1642                                 wfProfileOut( __METHOD__ );
1643                                 return $status;
1644                         }
1645                 }
1646
1647                 if ( wfReadOnly() ) {
1648                         $status->fatal( 'readonlytext' );
1649                         $status->value = self::AS_READ_ONLY_PAGE;
1650                         wfProfileOut( __METHOD__ . '-checks' );
1651                         wfProfileOut( __METHOD__ );
1652                         return $status;
1653                 }
1654                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1655                         $status->fatal( 'actionthrottledtext' );
1656                         $status->value = self::AS_RATE_LIMITED;
1657                         wfProfileOut( __METHOD__ . '-checks' );
1658                         wfProfileOut( __METHOD__ );
1659                         return $status;
1660                 }
1661
1662                 # If the article has been deleted while editing, don't save it without
1663                 # confirmation
1664                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1665                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1666                         wfProfileOut( __METHOD__ . '-checks' );
1667                         wfProfileOut( __METHOD__ );
1668                         return $status;
1669                 }
1670
1671                 wfProfileOut( __METHOD__ . '-checks' );
1672
1673                 # Load the page data from the master. If anything changes in the meantime,
1674                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1675                 $this->mArticle->loadPageData( 'fromdbmaster' );
1676                 $new = !$this->mArticle->exists();
1677
1678                 if ( $new ) {
1679                         // Late check for create permission, just in case *PARANOIA*
1680                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1681                                 $status->fatal( 'nocreatetext' );
1682                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1683                                 wfDebug( __METHOD__ . ": no create permission\n" );
1684                                 wfProfileOut( __METHOD__ );
1685                                 return $status;
1686                         }
1687
1688                         // Don't save a new page if it's blank or if it's a MediaWiki:
1689                         // message with content equivalent to default (allow empty pages
1690                         // in this case to disable messages, see bug 50124)
1691                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1692                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1693                                 $defaultText = $defaultMessageText;
1694                         } else {
1695                                 $defaultText = '';
1696                         }
1697
1698                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1699                                 $this->blankArticle = true;
1700                                 $status->fatal( 'blankarticle' );
1701                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1702                                 wfProfileOut( __METHOD__ );
1703                                 return $status;
1704                         }
1705
1706                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1707                                 wfProfileOut( __METHOD__ );
1708                                 return $status;
1709                         }
1710
1711                         $content = $textbox_content;
1712
1713                         $result['sectionanchor'] = '';
1714                         if ( $this->section == 'new' ) {
1715                                 if ( $this->sectiontitle !== '' ) {
1716                                         // Insert the section title above the content.
1717                                         $content = $content->addSectionHeader( $this->sectiontitle );
1718                                 } elseif ( $this->summary !== '' ) {
1719                                         // Insert the section title above the content.
1720                                         $content = $content->addSectionHeader( $this->summary );
1721                                 }
1722                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1723                         }
1724
1725                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1726
1727                 } else { # not $new
1728
1729                         # Article exists. Check for edit conflict.
1730
1731                         $this->mArticle->clear(); # Force reload of dates, etc.
1732                         $timestamp = $this->mArticle->getTimestamp();
1733
1734                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1735
1736                         if ( $timestamp != $this->edittime ) {
1737                                 $this->isConflict = true;
1738                                 if ( $this->section == 'new' ) {
1739                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1740                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1741                                         ) {
1742                                                 // Probably a duplicate submission of a new comment.
1743                                                 // This can happen when squid resends a request after
1744                                                 // a timeout but the first one actually went through.
1745                                                 wfDebug( __METHOD__
1746                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1747                                         } else {
1748                                                 // New comment; suppress conflict.
1749                                                 $this->isConflict = false;
1750                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1751                                         }
1752                                 } elseif ( $this->section == ''
1753                                         && Revision::userWasLastToEdit(
1754                                                 DB_MASTER, $this->mTitle->getArticleID(),
1755                                                 $wgUser->getId(), $this->edittime
1756                                         )
1757                                 ) {
1758                                         # Suppress edit conflict with self, except for section edits where merging is required.
1759                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1760                                         $this->isConflict = false;
1761                                 }
1762                         }
1763
1764                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1765                         if ( $this->sectiontitle !== '' ) {
1766                                 $sectionTitle = $this->sectiontitle;
1767                         } else {
1768                                 $sectionTitle = $this->summary;
1769                         }
1770
1771                         $content = null;
1772
1773                         if ( $this->isConflict ) {
1774                                 wfDebug( __METHOD__
1775                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1776                                         . " (article time '{$timestamp}')\n" );
1777
1778                                 $content = $this->mArticle->replaceSectionContent(
1779                                         $this->section,
1780                                         $textbox_content,
1781                                         $sectionTitle,
1782                                         $this->edittime
1783                                 );
1784                         } else {
1785                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1786                                 $content = $this->mArticle->replaceSectionContent(
1787                                         $this->section,
1788                                         $textbox_content,
1789                                         $sectionTitle
1790                                 );
1791                         }
1792
1793                         if ( is_null( $content ) ) {
1794                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1795                                 $this->isConflict = true;
1796                                 $content = $textbox_content; // do not try to merge here!
1797                         } elseif ( $this->isConflict ) {
1798                                 # Attempt merge
1799                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1800                                         // Successful merge! Maybe we should tell the user the good news?
1801                                         $this->isConflict = false;
1802                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1803                                 } else {
1804                                         $this->section = '';
1805                                         $this->textbox1 = ContentHandler::getContentText( $content );
1806                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1807                                 }
1808                         }
1809
1810                         if ( $this->isConflict ) {
1811                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1812                                 wfProfileOut( __METHOD__ );
1813                                 return $status;
1814                         }
1815
1816                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1817                                 wfProfileOut( __METHOD__ );
1818                                 return $status;
1819                         }
1820
1821                         if ( $this->section == 'new' ) {
1822                                 // Handle the user preference to force summaries here
1823                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1824                                         $this->missingSummary = true;
1825                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1826                                         $status->value = self::AS_SUMMARY_NEEDED;
1827                                         wfProfileOut( __METHOD__ );
1828                                         return $status;
1829                                 }
1830
1831                                 // Do not allow the user to post an empty comment
1832                                 if ( $this->textbox1 == '' ) {
1833                                         $this->missingComment = true;
1834                                         $status->fatal( 'missingcommenttext' );
1835                                         $status->value = self::AS_TEXTBOX_EMPTY;
1836                                         wfProfileOut( __METHOD__ );
1837                                         return $status;
1838                                 }
1839                         } elseif ( !$this->allowBlankSummary
1840                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1841                                 && !$content->isRedirect()
1842                                 && md5( $this->summary ) == $this->autoSumm
1843                         ) {
1844                                 $this->missingSummary = true;
1845                                 $status->fatal( 'missingsummary' );
1846                                 $status->value = self::AS_SUMMARY_NEEDED;
1847                                 wfProfileOut( __METHOD__ );
1848                                 return $status;
1849                         }
1850
1851                         # All's well
1852                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1853                         $sectionanchor = '';
1854                         if ( $this->section == 'new' ) {
1855                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1856                         } elseif ( $this->section != '' ) {
1857                                 # Try to get a section anchor from the section source, redirect
1858                                 # to edited section if header found.
1859                                 # XXX: Might be better to integrate this into Article::replaceSection
1860                                 # for duplicate heading checking and maybe parsing.
1861                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1862                                 # We can't deal with anchors, includes, html etc in the header for now,
1863                                 # headline would need to be parsed to improve this.
1864                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1865                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1866                                 }
1867                         }
1868                         $result['sectionanchor'] = $sectionanchor;
1869                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1870
1871                         // Save errors may fall down to the edit form, but we've now
1872                         // merged the section into full text. Clear the section field
1873                         // so that later submission of conflict forms won't try to
1874                         // replace that into a duplicated mess.
1875                         $this->textbox1 = $this->toEditText( $content );
1876                         $this->section = '';
1877
1878                         $status->value = self::AS_SUCCESS_UPDATE;
1879                 }
1880
1881                 // Check for length errors again now that the section is merged in
1882                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1883                 if ( $this->kblength > $wgMaxArticleSize ) {
1884                         $this->tooBig = true;
1885                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1886                         wfProfileOut( __METHOD__ );
1887                         return $status;
1888                 }
1889
1890                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1891                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1892                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1893                         ( $bot ? EDIT_FORCE_BOT : 0 );
1894
1895                 $doEditStatus = $this->mArticle->doEditContent(
1896                         $content,
1897                         $this->summary,
1898                         $flags,
1899                         false,
1900                         null,
1901                         $content->getDefaultFormat()
1902                 );
1903
1904                 if ( !$doEditStatus->isOK() ) {
1905                         // Failure from doEdit()
1906                         // Show the edit conflict page for certain recognized errors from doEdit(),
1907                         // but don't show it for errors from extension hooks
1908                         $errors = $doEditStatus->getErrorsArray();
1909                         if ( in_array( $errors[0][0],
1910                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1911                         ) {
1912                                 $this->isConflict = true;
1913                                 // Destroys data doEdit() put in $status->value but who cares
1914                                 $doEditStatus->value = self::AS_END;
1915                         }
1916                         wfProfileOut( __METHOD__ );
1917                         return $doEditStatus;
1918                 }
1919
1920                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1921                 if ( $result['nullEdit'] ) {
1922                         // We don't know if it was a null edit until now, so increment here
1923                         $wgUser->pingLimiter( 'linkpurge' );
1924                 }
1925                 $result['redirect'] = $content->isRedirect();
1926                 $this->updateWatchlist();
1927                 wfProfileOut( __METHOD__ );
1928                 return $status;
1929         }
1930
1931         /**
1932          * Register the change of watch status
1933          */
1934         protected function updateWatchlist() {
1935                 global $wgUser;
1936
1937                 if ( $wgUser->isLoggedIn()
1938                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1939                 ) {
1940                         $fname = __METHOD__;
1941                         $title = $this->mTitle;
1942                         $watch = $this->watchthis;
1943
1944                         // Do this in its own transaction to reduce contention...
1945                         $dbw = wfGetDB( DB_MASTER );
1946                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1947                                 $dbw->begin( $fname );
1948                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1949                                 $dbw->commit( $fname );
1950                         } );
1951                 }
1952         }
1953
1954         /**
1955          * Attempts to do 3-way merge of edit content with a base revision
1956          * and current content, in case of edit conflict, in whichever way appropriate
1957          * for the content type.
1958          *
1959          * @since 1.21
1960          *
1961          * @param Content $editContent
1962          *
1963          * @return bool
1964          */
1965         private function mergeChangesIntoContent( &$editContent ) {
1966                 wfProfileIn( __METHOD__ );
1967
1968                 $db = wfGetDB( DB_MASTER );
1969
1970                 // This is the revision the editor started from
1971                 $baseRevision = $this->getBaseRevision();
1972                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1973
1974                 if ( is_null( $baseContent ) ) {
1975                         wfProfileOut( __METHOD__ );
1976                         return false;
1977                 }
1978
1979                 // The current state, we want to merge updates into it
1980                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1981                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1982
1983                 if ( is_null( $currentContent ) ) {
1984                         wfProfileOut( __METHOD__ );
1985                         return false;
1986                 }
1987
1988                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1989
1990                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1991
1992                 if ( $result ) {
1993                         $editContent = $result;
1994                         wfProfileOut( __METHOD__ );
1995                         return true;
1996                 }
1997
1998                 wfProfileOut( __METHOD__ );
1999                 return false;
2000         }
2001
2002         /**
2003          * @return Revision
2004          */
2005         function getBaseRevision() {
2006                 if ( !$this->mBaseRevision ) {
2007                         $db = wfGetDB( DB_MASTER );
2008                         $this->mBaseRevision = Revision::loadFromTimestamp(
2009                                 $db, $this->mTitle, $this->edittime );
2010                 }
2011                 return $this->mBaseRevision;
2012         }
2013
2014         /**
2015          * Check given input text against $wgSpamRegex, and return the text of the first match.
2016          *
2017          * @param string $text
2018          *
2019          * @return string|bool Matching string or false
2020          */
2021         public static function matchSpamRegex( $text ) {
2022                 global $wgSpamRegex;
2023                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2024                 $regexes = (array)$wgSpamRegex;
2025                 return self::matchSpamRegexInternal( $text, $regexes );
2026         }
2027
2028         /**
2029          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2030          *
2031          * @param string $text
2032          *
2033          * @return string|bool Matching string or false
2034          */
2035         public static function matchSummarySpamRegex( $text ) {
2036                 global $wgSummarySpamRegex;
2037                 $regexes = (array)$wgSummarySpamRegex;
2038                 return self::matchSpamRegexInternal( $text, $regexes );
2039         }
2040
2041         /**
2042          * @param string $text
2043          * @param array $regexes
2044          * @return bool|string
2045          */
2046         protected static function matchSpamRegexInternal( $text, $regexes ) {
2047                 foreach ( $regexes as $regex ) {
2048                         $matches = array();
2049                         if ( preg_match( $regex, $text, $matches ) ) {
2050                                 return $matches[0];
2051                         }
2052                 }
2053                 return false;
2054         }
2055
2056         function setHeaders() {
2057                 global $wgOut, $wgUser;
2058
2059                 $wgOut->addModules( 'mediawiki.action.edit' );
2060                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2061
2062                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2063                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2064                 }
2065
2066                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2067                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2068                 }
2069
2070                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2071
2072                 # Enabled article-related sidebar, toplinks, etc.
2073                 $wgOut->setArticleRelated( true );
2074
2075                 $contextTitle = $this->getContextTitle();
2076                 if ( $this->isConflict ) {
2077                         $msg = 'editconflict';
2078                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2079                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2080                 } else {
2081                         $msg = $contextTitle->exists()
2082                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2083                                         && $contextTitle->getDefaultMessageText() !== false
2084                                 )
2085                                 ? 'editing'
2086                                 : 'creating';
2087                 }
2088
2089                 # Use the title defined by DISPLAYTITLE magic word when present
2090                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2091                 if ( $displayTitle === false ) {
2092                         $displayTitle = $contextTitle->getPrefixedText();
2093                 }
2094                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2095         }
2096
2097         /**
2098          * Show all applicable editing introductions
2099          */
2100         protected function showIntro() {
2101                 global $wgOut, $wgUser;
2102                 if ( $this->suppressIntro ) {
2103                         return;
2104                 }
2105
2106                 $namespace = $this->mTitle->getNamespace();
2107
2108                 if ( $namespace == NS_MEDIAWIKI ) {
2109                         # Show a warning if editing an interface message
2110                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2111                 } elseif ( $namespace == NS_FILE ) {
2112                         # Show a hint to shared repo
2113                         $file = wfFindFile( $this->mTitle );
2114                         if ( $file && !$file->isLocal() ) {
2115                                 $descUrl = $file->getDescriptionUrl();
2116                                 # there must be a description url to show a hint to shared repo
2117                                 if ( $descUrl ) {
2118                                         if ( !$this->mTitle->exists() ) {
2119                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2120                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2121                                                 ) );
2122                                         } else {
2123                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2124                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2125                                                 ) );
2126                                         }
2127                                 }
2128                         }
2129                 }
2130
2131                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2132                 # Show log extract when the user is currently blocked
2133                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2134                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2135                         $username = $parts[0];
2136                         $user = User::newFromName( $username, false /* allow IP users*/ );
2137                         $ip = User::isIP( $username );
2138                         $block = Block::newFromTarget( $user, $user );
2139                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2140                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2141                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2142                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) { # Show log extract if the user is currently blocked
2143                                 LogEventsList::showLogExtract(
2144                                         $wgOut,
2145                                         'block',
2146                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2147                                         '',
2148                                         array(
2149                                                 'lim' => 1,
2150                                                 'showIfEmpty' => false,
2151                                                 'msgKey' => array(
2152                                                         'blocked-notice-logextract',
2153                                                         $user->getName() # Support GENDER in notice
2154                                                 )
2155                                         )
2156                                 );
2157                         }
2158                 }
2159                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2160                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2161                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2162                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2163                         ) );
2164                         if ( $wgUser->isLoggedIn() ) {
2165                                 $wgOut->wrapWikiMsg(
2166                                         // Suppress the external link icon, consider the help url an internal one
2167                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2168                                         array(
2169                                                 'newarticletext',
2170                                                 $helpLink
2171                                         )
2172                                 );
2173                         } else {
2174                                 $wgOut->wrapWikiMsg(
2175                                         // Suppress the external link icon, consider the help url an internal one
2176                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2177                                         array(
2178                                                 'newarticletextanon',
2179                                                 $helpLink
2180                                         )
2181                                 );
2182                         }
2183                 }
2184                 # Give a notice if the user is editing a deleted/moved page...
2185                 if ( !$this->mTitle->exists() ) {
2186                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2187                                 '',
2188                                 array(
2189                                         'lim' => 10,
2190                                         'conds' => array( "log_action != 'revision'" ),
2191                                         'showIfEmpty' => false,
2192                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2193                                 )
2194                         );
2195                 }
2196         }
2197
2198         /**
2199          * Attempt to show a custom editing introduction, if supplied
2200          *
2201          * @return bool
2202          */
2203         protected function showCustomIntro() {
2204                 if ( $this->editintro ) {
2205                         $title = Title::newFromText( $this->editintro );
2206                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2207                                 global $wgOut;
2208                                 // Added using template syntax, to take <noinclude>'s into account.
2209                                 $wgOut->addWikiTextTitleTidy( '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>', $this->mTitle );
2210                                 return true;
2211                         }
2212                 }
2213                 return false;
2214         }
2215
2216         /**
2217          * Gets an editable textual representation of $content.
2218          * The textual representation can be turned by into a Content object by the
2219          * toEditContent() method.
2220          *
2221          * If $content is null or false or a string, $content is returned unchanged.
2222          *
2223          * If the given Content object is not of a type that can be edited using
2224          * the text base EditPage, an exception will be raised. Set
2225          * $this->allowNonTextContent to true to allow editing of non-textual
2226          * content.
2227          *
2228          * @param Content|null|bool|string $content
2229          * @return string The editable text form of the content.
2230          *
2231          * @throws MWException If $content is not an instance of TextContent and
2232          *   $this->allowNonTextContent is not true.
2233          */
2234         protected function toEditText( $content ) {
2235                 if ( $content === null || $content === false ) {
2236                         return $content;
2237                 }
2238
2239                 if ( is_string( $content ) ) {
2240                         return $content;
2241                 }
2242
2243                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2244                         throw new MWException( 'This content model is not supported: '
2245                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2246                 }
2247
2248                 return $content->serialize( $this->contentFormat );
2249         }
2250
2251         /**
2252          * Turns the given text into a Content object by unserializing it.
2253          *
2254          * If the resulting Content object is not of a type that can be edited using
2255          * the text base EditPage, an exception will be raised. Set
2256          * $this->allowNonTextContent to true to allow editing of non-textual
2257          * content.
2258          *
2259          * @param string|null|bool $text Text to unserialize
2260          * @return Content The content object created from $text. If $text was false
2261          *   or null, false resp. null will be  returned instead.
2262          *
2263          * @throws MWException If unserializing the text results in a Content
2264          *   object that is not an instance of TextContent and
2265          *   $this->allowNonTextContent is not true.
2266          */
2267         protected function toEditContent( $text ) {
2268                 if ( $text === false || $text === null ) {
2269                         return $text;
2270                 }
2271
2272                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2273                         $this->contentModel, $this->contentFormat );
2274
2275                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2276                         throw new MWException( 'This content model is not supported: '
2277                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2278                 }
2279
2280                 return $content;
2281         }
2282
2283         /**
2284          * Send the edit form and related headers to $wgOut
2285          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2286          *     during form output near the top, for captchas and the like.
2287          */
2288         function showEditForm( $formCallback = null ) {
2289                 global $wgOut, $wgUser;
2290
2291                 wfProfileIn( __METHOD__ );
2292
2293                 # need to parse the preview early so that we know which templates are used,
2294                 # otherwise users with "show preview after edit box" will get a blank list
2295                 # we parse this near the beginning so that setHeaders can do the title
2296                 # setting work instead of leaving it in getPreviewText
2297                 $previewOutput = '';
2298                 if ( $this->formtype == 'preview' ) {
2299                         $previewOutput = $this->getPreviewText();
2300                 }
2301
2302                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2303
2304                 $this->setHeaders();
2305
2306                 if ( $this->showHeader() === false ) {
2307                         wfProfileOut( __METHOD__ );
2308                         return;
2309                 }
2310
2311                 $wgOut->addHTML( $this->editFormPageTop );
2312
2313                 if ( $wgUser->getOption( 'previewontop' ) ) {
2314                         $this->displayPreviewArea( $previewOutput, true );
2315                 }
2316
2317                 $wgOut->addHTML( $this->editFormTextTop );
2318
2319                 $showToolbar = true;
2320                 if ( $this->wasDeletedSinceLastEdit() ) {
2321                         if ( $this->formtype == 'save' ) {
2322                                 // Hide the toolbar and edit area, user can click preview to get it back
2323                                 // Add an confirmation checkbox and explanation.
2324                                 $showToolbar = false;
2325                         } else {
2326                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2327                                         'deletedwhileediting' );
2328                         }
2329                 }
2330
2331                 // @todo add EditForm plugin interface and use it here!
2332                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2333                 $wgOut->addHTML( Html::openElement(
2334                         'form',
2335                         array(
2336                                 'id' => self::EDITFORM_ID,
2337                                 'name' => self::EDITFORM_ID,
2338                                 'method' => 'post',
2339                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2340                                 'enctype' => 'multipart/form-data'
2341                         )
2342                 ) );
2343
2344                 if ( is_callable( $formCallback ) ) {
2345                         call_user_func_array( $formCallback, array( &$wgOut ) );
2346                 }
2347
2348                 // Add an empty field to trip up spambots
2349                 $wgOut->addHTML(
2350                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2351                         . Html::rawElement(
2352                                 'label',
2353                                 array( 'for' => 'wpAntiSpam' ),
2354                                 wfMessage( 'simpleantispam-label' )->parse()
2355                         )
2356                         . Xml::element(
2357                                 'input',
2358                                 array(
2359                                         'type' => 'text',
2360                                         'name' => 'wpAntispam',
2361                                         'id' => 'wpAntispam',
2362                                         'value' => ''
2363                                 )
2364                         )
2365                         . Xml::closeElement( 'div' )
2366                 );
2367
2368                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2369
2370                 // Put these up at the top to ensure they aren't lost on early form submission
2371                 $this->showFormBeforeText();
2372
2373                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2374                         $username = $this->lastDelete->user_name;
2375                         $comment = $this->lastDelete->log_comment;
2376
2377                         // It is better to not parse the comment at all than to have templates expanded in the middle
2378                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2379                         $key = $comment === ''
2380                                 ? 'confirmrecreate-noreason'
2381                                 : 'confirmrecreate';
2382                         $wgOut->addHTML(
2383                                 '<div class="mw-confirm-recreate">' .
2384                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2385                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2386                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2387                                 ) .
2388                                 '</div>'
2389                         );
2390                 }
2391
2392                 # When the summary is hidden, also hide them on preview/show changes
2393                 if ( $this->nosummary ) {
2394                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2395                 }
2396
2397                 # If a blank edit summary was previously provided, and the appropriate
2398                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2399                 # user being bounced back more than once in the event that a summary
2400                 # is not required.
2401                 #####
2402                 # For a bit more sophisticated detection of blank summaries, hash the
2403                 # automatic one and pass that in the hidden field wpAutoSummary.
2404                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2405                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2406                 }
2407
2408                 if ( $this->undidRev ) {
2409                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2410                 }
2411
2412                 if ( $this->hasPresetSummary ) {
2413                         // If a summary has been preset using &summary= we don't want to prompt for
2414                         // a different summary. Only prompt for a summary if the summary is blanked.
2415                         // (Bug 17416)
2416                         $this->autoSumm = md5( '' );
2417                 }
2418
2419                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2420                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2421
2422                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2423
2424                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2425                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2426
2427                 if ( $this->section == 'new' ) {
2428                         $this->showSummaryInput( true, $this->summary );
2429                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2430                 }
2431
2432                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2433
2434                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2435                         $wgOut->addHTML( EditPage::getEditToolbar() );
2436                 }
2437
2438                 if ( $this->blankArticle ) {
2439                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2440                 }
2441
2442                 if ( $this->isConflict ) {
2443                         // In an edit conflict bypass the overridable content form method
2444                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2445                         // resolved between page source edits and custom ui edits using the
2446                         // custom edit ui.
2447                         $this->textbox2 = $this->textbox1;
2448
2449                         $content = $this->getCurrentContent();
2450                         $this->textbox1 = $this->toEditText( $content );
2451
2452                         $this->showTextbox1();
2453                 } else {
2454                         $this->showContentForm();
2455                 }
2456
2457                 $wgOut->addHTML( $this->editFormTextAfterContent );
2458
2459                 $this->showStandardInputs();
2460
2461                 $this->showFormAfterText();
2462
2463                 $this->showTosSummary();
2464
2465                 $this->showEditTools();
2466
2467                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2468
2469                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2470                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2471
2472                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2473                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2474
2475                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2476                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2477
2478                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2479
2480                 if ( $this->isConflict ) {
2481                         try {
2482                                 $this->showConflict();
2483                         } catch ( MWContentSerializationException $ex ) {
2484                                 // this can't really happen, but be nice if it does.
2485                                 $msg = wfMessage(
2486                                         'content-failed-to-parse',
2487                                         $this->contentModel,
2488                                         $this->contentFormat,
2489                                         $ex->getMessage()
2490                                 );
2491                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2492                         }
2493                 }
2494
2495                 // Marker for detecting truncated form data.  This must be the last
2496                 // parameter sent in order to be of use, so do not move me.
2497                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2498                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2499
2500                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2501                         $this->displayPreviewArea( $previewOutput, false );
2502                 }
2503
2504                 wfProfileOut( __METHOD__ );
2505         }
2506
2507         /**
2508          * Extract the section title from current section text, if any.
2509          *
2510          * @param string $text
2511          * @return string|bool String or false
2512          */
2513         public static function extractSectionTitle( $text ) {
2514                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2515                 if ( !empty( $matches[2] ) ) {
2516                         global $wgParser;
2517                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2518                 } else {
2519                         return false;
2520                 }
2521         }
2522
2523         /**
2524          * @return bool
2525          */
2526         protected function showHeader() {
2527                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2528                 global $wgAllowUserCss, $wgAllowUserJs;
2529
2530                 if ( $this->mTitle->isTalkPage() ) {
2531                         $wgOut->addWikiMsg( 'talkpagetext' );
2532                 }
2533
2534                 // Add edit notices
2535                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2536
2537                 if ( $this->isConflict ) {
2538                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2539                         $this->edittime = $this->mArticle->getTimestamp();
2540                 } else {
2541                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2542                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2543                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2544                                 // Someone is welcome to try refactoring though
2545                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2546                                 return false;
2547                         }
2548
2549                         if ( $this->section != '' && $this->section != 'new' ) {
2550                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2551                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2552                                         if ( $sectionTitle !== false ) {
2553                                                 $this->summary = "/* $sectionTitle */ ";
2554                                         }
2555                                 }
2556                         }
2557
2558                         if ( $this->missingComment ) {
2559                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2560                         }
2561
2562                         if ( $this->missingSummary && $this->section != 'new' ) {
2563                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2564                         }
2565
2566                         if ( $this->missingSummary && $this->section == 'new' ) {
2567                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2568                         }
2569
2570                         if ( $this->blankArticle ) {
2571                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2572                         }
2573
2574                         if ( $this->hookError !== '' ) {
2575                                 $wgOut->addWikiText( $this->hookError );
2576                         }
2577
2578                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2579                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2580                         }
2581
2582                         if ( $this->section != 'new' ) {
2583                                 $revision = $this->mArticle->getRevisionFetched();
2584                                 if ( $revision ) {
2585                                         // Let sysop know that this will make private content public if saved
2586
2587                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2588                                                 $wgOut->wrapWikiMsg(
2589                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2590                                                         'rev-deleted-text-permission'
2591                                                 );
2592                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2593                                                 $wgOut->wrapWikiMsg(
2594                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2595                                                         'rev-deleted-text-view'
2596                                                 );
2597                                         }
2598
2599                                         if ( !$revision->isCurrent() ) {
2600                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2601                                                 $wgOut->addWikiMsg( 'editingold' );
2602                                         }
2603                                 } elseif ( $this->mTitle->exists() ) {
2604                                         // Something went wrong
2605
2606                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2607                                                 array( 'missing-revision', $this->oldid ) );
2608                                 }
2609                         }
2610                 }
2611
2612                 if ( wfReadOnly() ) {
2613                         $wgOut->wrapWikiMsg(
2614                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2615                                 array( 'readonlywarning', wfReadOnlyReason() )
2616                         );
2617                 } elseif ( $wgUser->isAnon() ) {
2618                         if ( $this->formtype != 'preview' ) {
2619                                 $wgOut->wrapWikiMsg(
2620                                         "<div id='mw-anon-edit-warning'>\n$1\n</div>",
2621                                         array( 'anoneditwarning',
2622                                                 // Log-in link
2623                                                 '{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
2624                                                 // Sign-up link
2625                                                 '{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}' )
2626                                 );
2627                         } else {
2628                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>",
2629                                         'anonpreviewwarning'
2630                                 );
2631                         }
2632                 } else {
2633                         if ( $this->isCssJsSubpage ) {
2634                                 # Check the skin exists
2635                                 if ( $this->isWrongCaseCssJsPage ) {
2636                                         $wgOut->wrapWikiMsg(
2637                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2638                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2639                                         );
2640                                 }
2641                                 if ( $this->formtype !== 'preview' ) {
2642                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2643                                                 $wgOut->wrapWikiMsg(
2644                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2645                                                         array( 'usercssyoucanpreview' )
2646                                                 );
2647                                         }
2648
2649                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2650                                                 $wgOut->wrapWikiMsg(
2651                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2652                                                         array( 'userjsyoucanpreview' )
2653                                                 );
2654                                         }
2655                                 }
2656                         }
2657                 }
2658
2659                 if ( $this->mTitle->isProtected( 'edit' ) &&
2660                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2661                 ) {
2662                         # Is the title semi-protected?
2663                         if ( $this->mTitle->isSemiProtected() ) {
2664                                 $noticeMsg = 'semiprotectedpagewarning';
2665                         } else {
2666                                 # Then it must be protected based on static groups (regular)
2667                                 $noticeMsg = 'protectedpagewarning';
2668                         }
2669                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2670                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2671                 }
2672                 if ( $this->mTitle->isCascadeProtected() ) {
2673                         # Is this page under cascading protection from some source pages?
2674                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2675                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2676                         $cascadeSourcesCount = count( $cascadeSources );
2677                         if ( $cascadeSourcesCount > 0 ) {
2678                                 # Explain, and list the titles responsible
2679                                 foreach ( $cascadeSources as $page ) {
2680                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2681                                 }
2682                         }
2683                         $notice .= '</div>';
2684                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2685                 }
2686                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2687                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2688                                 array( 'lim' => 1,
2689                                         'showIfEmpty' => false,
2690                                         'msgKey' => array( 'titleprotectedwarning' ),
2691                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2692                 }
2693
2694                 if ( $this->kblength === false ) {
2695                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2696                 }
2697
2698                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2699                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2700                                 array(
2701                                         'longpageerror',
2702                                         $wgLang->formatNum( $this->kblength ),
2703                                         $wgLang->formatNum( $wgMaxArticleSize )
2704                                 )
2705                         );
2706                 } else {
2707                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2708                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2709                                         array(
2710                                                 'longpage-hint',
2711                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2712                                                 strlen( $this->textbox1 )
2713                                         )
2714                                 );
2715                         }
2716                 }
2717                 # Add header copyright warning
2718                 $this->showHeaderCopyrightWarning();
2719
2720                 return true;
2721         }
2722
2723         /**
2724          * Standard summary input and label (wgSummary), abstracted so EditPage
2725          * subclasses may reorganize the form.
2726          * Note that you do not need to worry about the label's for=, it will be
2727          * inferred by the id given to the input. You can remove them both by
2728          * passing array( 'id' => false ) to $userInputAttrs.
2729          *
2730          * @param string $summary The value of the summary input
2731          * @param string $labelText The html to place inside the label
2732          * @param array $inputAttrs Array of attrs to use on the input
2733          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2734          *
2735          * @return array An array in the format array( $label, $input )
2736          */
2737         function getSummaryInput( $summary = "", $labelText = null,
2738                 $inputAttrs = null, $spanLabelAttrs = null
2739         ) {
2740                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2741                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2742                         'id' => 'wpSummary',
2743                         'maxlength' => '200',
2744                         'tabindex' => '1',
2745                         'size' => 60,
2746                         'spellcheck' => 'true',
2747                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2748
2749                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2750                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2751                         'id' => "wpSummaryLabel"
2752                 );
2753
2754                 $label = null;
2755                 if ( $labelText ) {
2756                         $label = Xml::tags(
2757                                 'label',
2758                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2759                                 $labelText
2760                         );
2761                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2762                 }
2763
2764                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2765
2766                 return array( $label, $input );
2767         }
2768
2769         /**
2770          * @param bool $isSubjectPreview True if this is the section subject/title
2771          *   up top, or false if this is the comment summary
2772          *   down below the textarea
2773          * @param string $summary The text of the summary to display
2774          */
2775         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2776                 global $wgOut, $wgContLang;
2777                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2778                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2779                 if ( $isSubjectPreview ) {
2780                         if ( $this->nosummary ) {
2781                                 return;
2782                         }
2783                 } else {
2784                         if ( !$this->mShowSummaryField ) {
2785                                 return;
2786                         }
2787                 }
2788                 $summary = $wgContLang->recodeForEdit( $summary );
2789                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2790                 list( $label, $input ) = $this->getSummaryInput(
2791                         $summary,
2792                         $labelText,
2793                         array( 'class' => $summaryClass ),
2794                         array()
2795                 );
2796                 $wgOut->addHTML( "{$label} {$input}" );
2797         }
2798
2799         /**
2800          * @param bool $isSubjectPreview True if this is the section subject/title
2801          *   up top, or false if this is the comment summary
2802          *   down below the textarea
2803          * @param string $summary The text of the summary to display
2804          * @return string
2805          */
2806         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2807                 // avoid spaces in preview, gets always trimmed on save
2808                 $summary = trim( $summary );
2809                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2810                         return "";
2811                 }
2812
2813                 global $wgParser;
2814
2815                 if ( $isSubjectPreview ) {
2816                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2817                                 ->inContentLanguage()->text();
2818                 }
2819
2820                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2821
2822                 $summary = wfMessage( $message )->parse()
2823                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2824                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2825         }
2826
2827         protected function showFormBeforeText() {
2828                 global $wgOut;
2829                 $section = htmlspecialchars( $this->section );
2830                 $wgOut->addHTML( <<<HTML
2831 <input type='hidden' value="{$section}" name="wpSection" />
2832 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2833 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2834 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2835
2836 HTML
2837                 );
2838                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2839                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2840                 }
2841         }
2842
2843         protected function showFormAfterText() {
2844                 global $wgOut, $wgUser;
2845                 /**
2846                  * To make it harder for someone to slip a user a page
2847                  * which submits an edit form to the wiki without their
2848                  * knowledge, a random token is associated with the login
2849                  * session. If it's not passed back with the submission,
2850                  * we won't save the page, or render user JavaScript and
2851                  * CSS previews.
2852                  *
2853                  * For anon editors, who may not have a session, we just
2854                  * include the constant suffix to prevent editing from
2855                  * broken text-mangling proxies.
2856                  */
2857                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2858         }
2859
2860         /**
2861          * Subpage overridable method for printing the form for page content editing
2862          * By default this simply outputs wpTextbox1
2863          * Subclasses can override this to provide a custom UI for editing;
2864          * be it a form, or simply wpTextbox1 with a modified content that will be
2865          * reverse modified when extracted from the post data.
2866          * Note that this is basically the inverse for importContentFormData
2867          */
2868         protected function showContentForm() {
2869                 $this->showTextbox1();
2870         }
2871
2872         /**
2873          * Method to output wpTextbox1
2874          * The $textoverride method can be used by subclasses overriding showContentForm
2875          * to pass back to this method.
2876          *
2877          * @param array $customAttribs Array of html attributes to use in the textarea
2878          * @param string $textoverride Optional text to override $this->textarea1 with
2879          */
2880         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2881                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2882                         $attribs = array( 'style' => 'display:none;' );
2883                 } else {
2884                         $classes = array(); // Textarea CSS
2885                         if ( $this->mTitle->isProtected( 'edit' ) &&
2886                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2887                         ) {
2888                                 # Is the title semi-protected?
2889                                 if ( $this->mTitle->isSemiProtected() ) {
2890                                         $classes[] = 'mw-textarea-sprotected';
2891                                 } else {
2892                                         # Then it must be protected based on static groups (regular)
2893                                         $classes[] = 'mw-textarea-protected';
2894                                 }
2895                                 # Is the title cascade-protected?
2896                                 if ( $this->mTitle->isCascadeProtected() ) {
2897                                         $classes[] = 'mw-textarea-cprotected';
2898                                 }
2899                         }
2900
2901                         $attribs = array( 'tabindex' => 1 );
2902
2903                         if ( is_array( $customAttribs ) ) {
2904                                 $attribs += $customAttribs;
2905                         }
2906
2907                         if ( count( $classes ) ) {
2908                                 if ( isset( $attribs['class'] ) ) {
2909                                         $classes[] = $attribs['class'];
2910                                 }
2911                                 $attribs['class'] = implode( ' ', $classes );
2912                         }
2913                 }
2914
2915                 $this->showTextbox(
2916                         $textoverride !== null ? $textoverride : $this->textbox1,
2917                         'wpTextbox1',
2918                         $attribs
2919                 );
2920         }
2921
2922         protected function showTextbox2() {
2923                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2924         }
2925
2926         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2927                 global $wgOut, $wgUser;
2928
2929                 $wikitext = $this->safeUnicodeOutput( $text );
2930                 if ( strval( $wikitext ) !== '' ) {
2931                         // Ensure there's a newline at the end, otherwise adding lines
2932                         // is awkward.
2933                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2934                         // mode will show an extra newline. A bit annoying.
2935                         $wikitext .= "\n";
2936                 }
2937
2938                 $attribs = $customAttribs + array(
2939                         'accesskey' => ',',
2940                         'id' => $name,
2941                         'cols' => $wgUser->getIntOption( 'cols' ),
2942                         'rows' => $wgUser->getIntOption( 'rows' ),
2943                         // Avoid PHP notices when appending preferences
2944                         // (appending allows customAttribs['style'] to still work).
2945                         'style' => ''
2946                 );
2947
2948                 $pageLang = $this->mTitle->getPageLanguage();
2949                 $attribs['lang'] = $pageLang->getCode();
2950                 $attribs['dir'] = $pageLang->getDir();
2951
2952                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2953         }
2954
2955         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2956                 global $wgOut;
2957                 $classes = array();
2958                 if ( $isOnTop ) {
2959                         $classes[] = 'ontop';
2960                 }
2961
2962                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2963
2964                 if ( $this->formtype != 'preview' ) {
2965                         $attribs['style'] = 'display: none;';
2966                 }
2967
2968                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2969
2970                 if ( $this->formtype == 'preview' ) {
2971                         $this->showPreview( $previewOutput );
2972                 }
2973
2974                 $wgOut->addHTML( '</div>' );
2975
2976                 if ( $this->formtype == 'diff' ) {
2977                         try {
2978                                 $this->showDiff();
2979                         } catch ( MWContentSerializationException $ex ) {
2980                                 $msg = wfMessage(
2981                                         'content-failed-to-parse',
2982                                         $this->contentModel,
2983                                         $this->contentFormat,
2984                                         $ex->getMessage()
2985                                 );
2986                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2987                         }
2988                 }
2989         }
2990
2991         /**
2992          * Append preview output to $wgOut.
2993          * Includes category rendering if this is a category page.
2994          *
2995          * @param string $text The HTML to be output for the preview.
2996          */
2997         protected function showPreview( $text ) {
2998                 global $wgOut;
2999                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3000                         $this->mArticle->openShowCategory();
3001                 }
3002                 # This hook seems slightly odd here, but makes things more
3003                 # consistent for extensions.
3004                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3005                 $wgOut->addHTML( $text );
3006                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3007                         $this->mArticle->closeShowCategory();
3008                 }
3009         }
3010
3011         /**
3012          * Get a diff between the current contents of the edit box and the
3013          * version of the page we're editing from.
3014          *
3015          * If this is a section edit, we'll replace the section as for final
3016          * save and then make a comparison.
3017          */
3018         function showDiff() {
3019                 global $wgUser, $wgContLang, $wgOut;
3020
3021                 $oldtitlemsg = 'currentrev';
3022                 # if message does not exist, show diff against the preloaded default
3023                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3024                         $oldtext = $this->mTitle->getDefaultMessageText();
3025                         if ( $oldtext !== false ) {
3026                                 $oldtitlemsg = 'defaultmessagetext';
3027                                 $oldContent = $this->toEditContent( $oldtext );
3028                         } else {
3029                                 $oldContent = null;
3030                         }
3031                 } else {
3032                         $oldContent = $this->getCurrentContent();
3033                 }
3034
3035                 $textboxContent = $this->toEditContent( $this->textbox1 );
3036
3037                 $newContent = $this->mArticle->replaceSectionContent(
3038                                                         $this->section, $textboxContent,
3039                                                         $this->summary, $this->edittime );
3040
3041                 if ( $newContent ) {
3042                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3043                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3044
3045                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3046                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3047                 }
3048
3049                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3050                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3051                         $newtitle = wfMessage( 'yourtext' )->parse();
3052
3053                         if ( !$oldContent ) {
3054                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3055                         }
3056
3057                         if ( !$newContent ) {
3058                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3059                         }
3060
3061                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3062                         $de->setContent( $oldContent, $newContent );
3063
3064                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3065                         $de->showDiffStyle();
3066                 } else {
3067                         $difftext = '';
3068                 }
3069
3070                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3071         }
3072
3073         /**
3074          * Show the header copyright warning.
3075          */
3076         protected function showHeaderCopyrightWarning() {
3077                 $msg = 'editpage-head-copy-warn';
3078                 if ( !wfMessage( $msg )->isDisabled() ) {
3079                         global $wgOut;
3080                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3081                                 'editpage-head-copy-warn' );
3082                 }
3083         }
3084
3085         /**
3086          * Give a chance for site and per-namespace customizations of
3087          * terms of service summary link that might exist separately
3088          * from the copyright notice.
3089          *
3090          * This will display between the save button and the edit tools,
3091          * so should remain short!
3092          */
3093         protected function showTosSummary() {
3094                 $msg = 'editpage-tos-summary';
3095                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3096                 if ( !wfMessage( $msg )->isDisabled() ) {
3097                         global $wgOut;
3098                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3099                         $wgOut->addWikiMsg( $msg );
3100                         $wgOut->addHTML( '</div>' );
3101                 }
3102         }
3103
3104         protected function showEditTools() {
3105                 global $wgOut;
3106                 $wgOut->addHTML( '<div class="mw-editTools">' .
3107                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3108                         '</div>' );
3109         }
3110
3111         /**
3112          * Get the copyright warning
3113          *
3114          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3115          * @return string
3116          */
3117         protected function getCopywarn() {
3118                 return self::getCopyrightWarning( $this->mTitle );
3119         }
3120
3121         /**
3122          * Get the copyright warning, by default returns wikitext
3123          *
3124          * @param Title $title
3125          * @param string $format Output format, valid values are any function of a Message object
3126          * @return string
3127          */
3128         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3129                 global $wgRightsText;
3130                 if ( $wgRightsText ) {
3131                         $copywarnMsg = array( 'copyrightwarning',
3132                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3133                                 $wgRightsText );
3134                 } else {
3135                         $copywarnMsg = array( 'copyrightwarning2',
3136                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3137                 }
3138                 // Allow for site and per-namespace customization of contribution/copyright notice.
3139                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3140
3141                 return "<div id=\"editpage-copywarn\">\n" .
3142                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3143         }
3144
3145         /**
3146          * Get the Limit report for page previews
3147          *
3148          * @since 1.22
3149          * @param ParserOutput $output ParserOutput object from the parse
3150          * @return string HTML
3151          */
3152         public static function getPreviewLimitReport( $output ) {
3153                 if ( !$output || !$output->getLimitReportData() ) {
3154                         return '';
3155                 }
3156
3157                 wfProfileIn( __METHOD__ );
3158
3159                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3160                         wfMessage( 'limitreport-title' )->parseAsBlock()
3161                 );
3162
3163                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3164                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3165
3166                 $limitReport .= Html::openElement( 'table', array(
3167                         'class' => 'preview-limit-report wikitable'
3168                 ) ) .
3169                         Html::openElement( 'tbody' );
3170
3171                 foreach ( $output->getLimitReportData() as $key => $value ) {
3172                         if ( wfRunHooks( 'ParserLimitReportFormat',
3173                                 array( $key, &$value, &$limitReport, true, true )
3174                         ) ) {
3175                                 $keyMsg = wfMessage( $key );
3176                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3177                                 if ( !$valueMsg->exists() ) {
3178                                         $valueMsg = new RawMessage( '$1' );
3179                                 }
3180                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3181                                         $limitReport .= Html::openElement( 'tr' ) .
3182                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3183                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3184                                                 Html::closeElement( 'tr' );
3185                                 }
3186                         }
3187                 }
3188
3189                 $limitReport .= Html::closeElement( 'tbody' ) .
3190                         Html::closeElement( 'table' ) .
3191                         Html::closeElement( 'div' );
3192
3193                 wfProfileOut( __METHOD__ );
3194
3195                 return $limitReport;
3196         }
3197
3198         protected function showStandardInputs( &$tabindex = 2 ) {
3199                 global $wgOut, $wgUseMediaWikiUIEverywhere;
3200                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3201
3202                 if ( $this->section != 'new' ) {
3203                         $this->showSummaryInput( false, $this->summary );
3204                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3205                 }
3206
3207                 $checkboxes = $this->getCheckboxes( $tabindex,
3208                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3209                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3210
3211                 // Show copyright warning.
3212                 $wgOut->addWikiText( $this->getCopywarn() );
3213                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3214
3215                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3216                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3217
3218                 $cancel = $this->getCancelLink();
3219                 if ( $cancel !== '' ) {
3220                         $cancel .= Html::element( 'span',
3221                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3222                                 wfMessage( 'pipe-separator' )->text() );
3223                 }
3224
3225                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3226                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3227                 $attrs = array(
3228                         'target' => 'helpwindow',
3229                         'href' => $edithelpurl,
3230                 );
3231                 if ( $wgUseMediaWikiUIEverywhere ) {
3232                         $attrs['class'] = 'mw-ui-button mw-ui-quiet';
3233                 }
3234                 $edithelp = Html::element( 'a', $attrs, wfMessage( 'edithelp' )->text() ) .
3235                         wfMessage( 'word-separator' )->escaped() .
3236                         wfMessage( 'newwindow' )->parse();
3237
3238                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3239                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3240                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3241
3242                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3243
3244                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3245         }
3246
3247         /**
3248          * Show an edit conflict. textbox1 is already shown in showEditForm().
3249          * If you want to use another entry point to this function, be careful.
3250          */
3251         protected function showConflict() {
3252                 global $wgOut;
3253
3254                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3255                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3256
3257                         $content1 = $this->toEditContent( $this->textbox1 );
3258                         $content2 = $this->toEditContent( $this->textbox2 );
3259
3260                         $handler = ContentHandler::getForModelID( $this->contentModel );
3261                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3262                         $de->setContent( $content2, $content1 );
3263                         $de->showDiff(
3264                                 wfMessage( 'yourtext' )->parse(),
3265                                 wfMessage( 'storedversion' )->text()
3266                         );
3267
3268                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3269                         $this->showTextbox2();
3270                 }
3271         }
3272
3273         /**
3274          * @return string
3275          */
3276         public function getCancelLink() {
3277                 global $wgUseMediaWikiUIEverywhere;
3278                 $cancelParams = array();
3279                 if ( !$this->isConflict && $this->oldid > 0 ) {
3280                         $cancelParams['oldid'] = $this->oldid;
3281                 }
3282                 $attrs = array( 'id' => 'mw-editform-cancel' );
3283                 if ( $wgUseMediaWikiUIEverywhere ) {
3284                         $attrs['class'] = 'mw-ui-button mw-ui-quiet';
3285                 }
3286
3287                 return Linker::linkKnown(
3288                         $this->getContextTitle(),
3289                         wfMessage( 'cancel' )->parse(),
3290                         $attrs,
3291                         $cancelParams
3292                 );
3293         }
3294
3295         /**
3296          * Returns the URL to use in the form's action attribute.
3297          * This is used by EditPage subclasses when simply customizing the action
3298          * variable in the constructor is not enough. This can be used when the
3299          * EditPage lives inside of a Special page rather than a custom page action.
3300          *
3301          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3302          * @return string
3303          */
3304         protected function getActionURL( Title $title ) {
3305                 return $title->getLocalURL( array( 'action' => $this->action ) );
3306         }
3307
3308         /**
3309          * Check if a page was deleted while the user was editing it, before submit.
3310          * Note that we rely on the logging table, which hasn't been always there,
3311          * but that doesn't matter, because this only applies to brand new
3312          * deletes.
3313          * @return bool
3314          */
3315         protected function wasDeletedSinceLastEdit() {
3316                 if ( $this->deletedSinceEdit !== null ) {
3317                         return $this->deletedSinceEdit;
3318                 }
3319
3320                 $this->deletedSinceEdit = false;
3321
3322                 if ( $this->mTitle->isDeletedQuick() ) {
3323                         $this->lastDelete = $this->getLastDelete();
3324                         if ( $this->lastDelete ) {
3325                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3326                                 if ( $deleteTime > $this->starttime ) {
3327                                         $this->deletedSinceEdit = true;
3328                                 }
3329                         }
3330                 }
3331
3332                 return $this->deletedSinceEdit;
3333         }
3334
3335         /**
3336          * @return bool|stdClass
3337          */
3338         protected function getLastDelete() {
3339                 $dbr = wfGetDB( DB_SLAVE );
3340                 $data = $dbr->selectRow(
3341                         array( 'logging', 'user' ),
3342                         array(
3343                                 'log_type',
3344                                 'log_action',
3345                                 'log_timestamp',
3346                                 'log_user',
3347                                 'log_namespace',
3348                                 'log_title',
3349                                 'log_comment',
3350                                 'log_params',
3351                                 'log_deleted',
3352                                 'user_name'
3353                         ), array(
3354                                 'log_namespace' => $this->mTitle->getNamespace(),
3355                                 'log_title' => $this->mTitle->getDBkey(),
3356                                 'log_type' => 'delete',
3357                                 'log_action' => 'delete',
3358                                 'user_id=log_user'
3359                         ),
3360                         __METHOD__,
3361                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3362                 );
3363                 // Quick paranoid permission checks...
3364                 if ( is_object( $data ) ) {
3365                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3366                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3367                         }
3368
3369                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3370                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3371                         }
3372                 }
3373
3374                 return $data;
3375         }
3376
3377         /**
3378          * Get the rendered text for previewing.
3379          * @throws MWException
3380          * @return string
3381          */
3382         function getPreviewText() {
3383                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3384                 global $wgAllowUserCss, $wgAllowUserJs;
3385
3386                 wfProfileIn( __METHOD__ );
3387
3388                 if ( $wgRawHtml && !$this->mTokenOk ) {
3389                         // Could be an offsite preview attempt. This is very unsafe if
3390                         // HTML is enabled, as it could be an attack.
3391                         $parsedNote = '';
3392                         if ( $this->textbox1 !== '' ) {
3393                                 // Do not put big scary notice, if previewing the empty
3394                                 // string, which happens when you initially edit
3395                                 // a category page, due to automatic preview-on-open.
3396                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3397                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3398                         }
3399                         wfProfileOut( __METHOD__ );
3400                         return $parsedNote;
3401                 }
3402
3403                 $note = '';
3404
3405                 try {
3406                         $content = $this->toEditContent( $this->textbox1 );
3407
3408                         $previewHTML = '';
3409                         if ( !wfRunHooks(
3410                                 'AlternateEditPreview',
3411                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3412                         ) {
3413                                 wfProfileOut( __METHOD__ );
3414                                 return $previewHTML;
3415                         }
3416
3417                         # provide a anchor link to the editform
3418                         $continueEditing = '<span class="mw-continue-editing">' .
3419                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3420                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3421                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3422                                 if ( $this->mTokenOkExceptSuffix ) {
3423                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3424                                 } else {
3425                                         $note = wfMessage( 'session_fail_preview' )->plain();
3426                                 }
3427                         } elseif ( $this->incompleteForm ) {
3428                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3429                         } else {
3430                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3431                         }
3432
3433                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3434                         $parserOptions->setEditSection( false );
3435                         $parserOptions->setIsPreview( true );
3436                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3437
3438                         # don't parse non-wikitext pages, show message about preview
3439                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3440                                 if ( $this->mTitle->isCssJsSubpage() ) {
3441                                         $level = 'user';
3442                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3443                                         $level = 'site';
3444                                 } else {
3445                                         $level = false;
3446                                 }
3447
3448                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3449                                         $format = 'css';
3450                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3451                                                 $format = false;
3452                                         }
3453                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3454                                         $format = 'js';
3455                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3456                                                 $format = false;
3457                                         }
3458                                 } else {
3459                                         $format = false;
3460                                 }
3461
3462                                 # Used messages to make sure grep find them:
3463                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3464                                 if ( $level && $format ) {
3465                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3466                                                 wfMessage( "{$level}{$format}preview" )->text() .
3467                                                 ' ' . $continueEditing . "</div>";
3468                                 }
3469                         }
3470
3471                         # If we're adding a comment, we need to show the
3472                         # summary as the headline
3473                         if ( $this->section === "new" && $this->summary !== "" ) {
3474                                 $content = $content->addSectionHeader( $this->summary );
3475                         }
3476
3477                         $hook_args = array( $this, &$content );
3478                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3479                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3480
3481                         $parserOptions->enableLimitReport();
3482
3483                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3484                         # But it's now deprecated, so never mind
3485
3486                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3487                         $parserOutput = $content->getParserOutput(
3488                                 $this->getArticle()->getTitle(),
3489                                 null,
3490                                 $parserOptions
3491                         );
3492
3493                         $previewHTML = $parserOutput->getText();
3494                         $this->mParserOutput = $parserOutput;
3495                         $wgOut->addParserOutputMetadata( $parserOutput );
3496
3497                         if ( count( $parserOutput->getWarnings() ) ) {
3498                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3499                         }
3500                 } catch ( MWContentSerializationException $ex ) {
3501                         $m = wfMessage(
3502                                 'content-failed-to-parse',
3503                                 $this->contentModel,
3504                                 $this->contentFormat,
3505                                 $ex->getMessage()
3506                         );
3507                         $note .= "\n\n" . $m->parse();
3508                         $previewHTML = '';
3509                 }
3510
3511                 if ( $this->isConflict ) {
3512                         $conflict = '<h2 id="mw-previewconflict">'
3513                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3514                 } else {
3515                         $conflict = '<hr />';
3516                 }
3517
3518                 $previewhead = "<div class='previewnote'>\n" .
3519                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3520                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3521
3522                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3523                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3524                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3525                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3526
3527                 wfProfileOut( __METHOD__ );
3528                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3529         }
3530
3531         /**
3532          * @return array
3533          */
3534         function getTemplates() {
3535                 if ( $this->preview || $this->section != '' ) {
3536                         $templates = array();
3537                         if ( !isset( $this->mParserOutput ) ) {
3538                                 return $templates;
3539                         }
3540                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3541                                 foreach ( array_keys( $template ) as $dbk ) {
3542                                         $templates[] = Title::makeTitle( $ns, $dbk );
3543                                 }
3544                         }
3545                         return $templates;
3546                 } else {
3547                         return $this->mTitle->getTemplateLinksFrom();
3548                 }
3549         }
3550
3551         /**
3552          * Shows a bulletin board style toolbar for common editing functions.
3553          * It can be disabled in the user preferences.
3554          *
3555          * @return string
3556          */
3557         static function getEditToolbar() {
3558                 global $wgContLang, $wgOut;
3559                 global $wgEnableUploads, $wgForeignFileRepos;
3560
3561                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3562
3563                 /**
3564                  * $toolarray is an array of arrays each of which includes the
3565                  * opening tag, the closing tag, optionally a sample text that is
3566                  * inserted between the two when no selection is highlighted
3567                  * and.  The tip text is shown when the user moves the mouse
3568                  * over the button.
3569                  *
3570                  * Images are defined in ResourceLoaderEditToolbarModule.
3571                  */
3572                 $toolarray = array(
3573                         array(
3574                                 'id'     => 'mw-editbutton-bold',
3575                                 'open'   => '\'\'\'',
3576                                 'close'  => '\'\'\'',
3577                                 'sample' => wfMessage( 'bold_sample' )->text(),
3578                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3579                         ),
3580                         array(
3581                                 'id'     => 'mw-editbutton-italic',
3582                                 'open'   => '\'\'',
3583                                 'close'  => '\'\'',
3584                                 'sample' => wfMessage( 'italic_sample' )->text(),
3585                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3586                         ),
3587                         array(
3588                                 'id'     => 'mw-editbutton-link',
3589                                 'open'   => '[[',
3590                                 'close'  => ']]',
3591                                 'sample' => wfMessage( 'link_sample' )->text(),
3592                                 'tip'    => wfMessage( 'link_tip' )->text(),
3593                         ),
3594                         array(
3595                                 'id'     => 'mw-editbutton-extlink',
3596                                 'open'   => '[',
3597                                 'close'  => ']',
3598                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3599                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3600                         ),
3601                         array(
3602                                 'id'     => 'mw-editbutton-headline',
3603                                 'open'   => "\n== ",
3604                                 'close'  => " ==\n",
3605                                 'sample' => wfMessage( 'headline_sample' )->text(),
3606                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3607                         ),
3608                         $imagesAvailable ? array(
3609                                 'id'     => 'mw-editbutton-image',
3610                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3611                                 'close'  => ']]',
3612                                 'sample' => wfMessage( 'image_sample' )->text(),
3613                                 'tip'    => wfMessage( 'image_tip' )->text(),
3614                         ) : false,
3615                         $imagesAvailable ? array(
3616                                 'id'     => 'mw-editbutton-media',
3617                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3618                                 'close'  => ']]',
3619                                 'sample' => wfMessage( 'media_sample' )->text(),
3620                                 'tip'    => wfMessage( 'media_tip' )->text(),
3621                         ) : false,
3622                         array(
3623                                 'id'     => 'mw-editbutton-nowiki',
3624                                 'open'   => "<nowiki>",
3625                                 'close'  => "</nowiki>",
3626                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3627                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3628                         ),
3629                         array(
3630                                 'id'     => 'mw-editbutton-signature',
3631                                 'open'   => '--~~~~',
3632                                 'close'  => '',
3633                                 'sample' => '',
3634                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3635                         ),
3636                         array(
3637                                 'id'     => 'mw-editbutton-hr',
3638                                 'open'   => "\n----\n",
3639                                 'close'  => '',
3640                                 'sample' => '',
3641                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3642                         )
3643                 );
3644
3645                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3646                 foreach ( $toolarray as $tool ) {
3647                         if ( !$tool ) {
3648                                 continue;
3649                         }
3650
3651                         $params = array(
3652                                 // Images are defined in ResourceLoaderEditToolbarModule
3653                                 false,
3654                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3655                                 // Older browsers show a "speedtip" type message only for ALT.
3656                                 // Ideally these should be different, realistically they
3657                                 // probably don't need to be.
3658                                 $tool['tip'],
3659                                 $tool['open'],
3660                                 $tool['close'],
3661                                 $tool['sample'],
3662                                 $tool['id'],
3663                         );
3664
3665                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3666                 }
3667
3668                 // This used to be called on DOMReady from mediawiki.action.edit, which
3669                 // ended up causing race conditions with the setup code above.
3670                 $script .= "\n" .
3671                         "// Create button bar\n" .
3672                         "$(function() { mw.toolbar.init(); } );\n";
3673
3674                 $script .= '});';
3675                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3676
3677                 $toolbar = '<div id="toolbar"></div>';
3678
3679                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3680
3681                 return $toolbar;
3682         }
3683
3684         /**
3685          * Returns an array of html code of the following checkboxes:
3686          * minor and watch
3687          *
3688          * @param int $tabindex Current tabindex
3689          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3690          *                 status of the checkbox
3691          *
3692          * @return array
3693          */
3694         public function getCheckboxes( &$tabindex, $checked ) {
3695                 global $wgUser, $wgUseMediaWikiUIEverywhere;
3696
3697                 $checkboxes = array();
3698
3699                 // don't show the minor edit checkbox if it's a new page or section
3700                 if ( !$this->isNew ) {
3701                         $checkboxes['minor'] = '';
3702                         $minorLabel = wfMessage( 'minoredit' )->parse();
3703                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3704                                 $attribs = array(
3705                                         'tabindex' => ++$tabindex,
3706                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3707                                         'id' => 'wpMinoredit',
3708                                 );
3709                                 $minorEditHtml =
3710                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3711                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3712                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3713                                         ">{$minorLabel}</label>";
3714
3715                                 if ( $wgUseMediaWikiUIEverywhere ) {
3716                                         $checkboxes['minor'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3717                                                 $minorEditHtml .
3718                                         Html::closeElement( 'div' );
3719                                 } else {
3720                                         $checkboxes['minor'] = $minorEditHtml;
3721                                 }
3722                         }
3723                 }
3724
3725                 $watchLabel = wfMessage( 'watchthis' )->parse();
3726                 $checkboxes['watch'] = '';
3727                 if ( $wgUser->isLoggedIn() ) {
3728                         $attribs = array(
3729                                 'tabindex' => ++$tabindex,
3730                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3731                                 'id' => 'wpWatchthis',
3732                         );
3733                         $watchThisHtml =
3734                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3735                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3736                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3737                                 ">{$watchLabel}</label>";
3738                         if ( $wgUseMediaWikiUIEverywhere ) {
3739                                 $checkboxes['watch'] = Html::openElement( 'div', array( 'class' => 'mw-ui-checkbox' ) ) .
3740                                         $watchThisHtml .
3741                                         Html::closeElement( 'div' );
3742                         } else {
3743                                 $checkboxes['watch'] = $watchThisHtml;
3744                         }
3745                 }
3746                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3747                 return $checkboxes;
3748         }
3749
3750         /**
3751          * Returns an array of html code of the following buttons:
3752          * save, diff, preview and live
3753          *
3754          * @param int $tabindex Current tabindex
3755          *
3756          * @return array
3757          */
3758         public function getEditButtons( &$tabindex ) {
3759                 global $wgUseMediaWikiUIEverywhere;
3760
3761                 $buttons = array();
3762
3763                 $attribs = array(
3764                         'id' => 'wpSave',
3765                         'name' => 'wpSave',
3766                         'type' => 'submit',
3767                         'tabindex' => ++$tabindex,
3768                         'value' => wfMessage( 'savearticle' )->text(),
3769                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3770                 if ( $wgUseMediaWikiUIEverywhere ) {
3771                         $attribs['class'] = 'mw-ui-button mw-ui-constructive';
3772                 }
3773                 $buttons['save'] = Xml::element( 'input', $attribs, '' );
3774
3775                 ++$tabindex; // use the same for preview and live preview
3776                 $attribs = array(
3777                         'id' => 'wpPreview',
3778                         'name' => 'wpPreview',
3779                         'type' => 'submit',
3780                         'tabindex' => $tabindex,
3781                         'value' => wfMessage( 'showpreview' )->text(),
3782                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3783                 if ( $wgUseMediaWikiUIEverywhere ) {
3784                         $attribs['class'] = 'mw-ui-button mw-ui-progressive';
3785                 }
3786                 $buttons['preview'] = Xml::element( 'input', $attribs, '' );
3787                 $buttons['live'] = '';
3788
3789                 $attribs = array(
3790                         'id' => 'wpDiff',
3791                         'name' => 'wpDiff',
3792                         'type' => 'submit',
3793                         'tabindex' => ++$tabindex,
3794                         'value' => wfMessage( 'showdiff' )->text(),
3795                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3796                 if ( $wgUseMediaWikiUIEverywhere ) {
3797                         $attribs['class'] = 'mw-ui-button mw-ui-progressive';
3798                 }
3799                 $buttons['diff'] = Xml::element( 'input', $attribs, '' );
3800
3801                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3802                 return $buttons;
3803         }
3804
3805         /**
3806          * Output preview text only. This can be sucked into the edit page
3807          * via JavaScript, and saves the server time rendering the skin as
3808          * well as theoretically being more robust on the client (doesn't
3809          * disturb the edit box's undo history, won't eat your text on
3810          * failure, etc).
3811          *
3812          * @todo This doesn't include category or interlanguage links.
3813          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3814          *       or something...</s>" that might also require more skin
3815          *       initialization, so check whether that's a problem.
3816          */
3817         function livePreview() {
3818                 global $wgOut;
3819                 $wgOut->disable();
3820                 header( 'Content-type: text/xml; charset=utf-8' );
3821                 header( 'Cache-control: no-cache' );
3822
3823                 $previewText = $this->getPreviewText();
3824                 #$categories = $skin->getCategoryLinks();
3825
3826                 $s =
3827                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3828                         Xml::tags( 'livepreview', null,
3829                                 Xml::element( 'preview', null, $previewText )
3830                                 #.      Xml::element( 'category', null, $categories )
3831                         );
3832                 echo $s;
3833         }
3834
3835         /**
3836          * Creates a basic error page which informs the user that
3837          * they have attempted to edit a nonexistent section.
3838          */
3839         function noSuchSectionPage() {
3840                 global $wgOut;
3841
3842                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3843
3844                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3845                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3846                 $wgOut->addHTML( $res );
3847
3848                 $wgOut->returnToMain( false, $this->mTitle );
3849         }
3850
3851         /**
3852          * Show "your edit contains spam" page with your diff and text
3853          *
3854          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3855          */
3856         public function spamPageWithContent( $match = false ) {
3857                 global $wgOut, $wgLang;
3858                 $this->textbox2 = $this->textbox1;
3859
3860                 if ( is_array( $match ) ) {
3861                         $match = $wgLang->listToText( $match );
3862                 }
3863                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3864
3865                 $wgOut->addHTML( '<div id="spamprotected">' );
3866                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3867                 if ( $match ) {
3868                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3869                 }
3870                 $wgOut->addHTML( '</div>' );
3871
3872                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3873                 $this->showDiff();
3874
3875                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3876                 $this->showTextbox2();
3877
3878                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3879         }
3880
3881         /**
3882          * Check if the browser is on a blacklist of user-agents known to
3883          * mangle UTF-8 data on form submission. Returns true if Unicode
3884          * should make it through, false if it's known to be a problem.
3885          * @return bool
3886          */
3887         private function checkUnicodeCompliantBrowser() {
3888                 global $wgBrowserBlackList, $wgRequest;
3889
3890                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3891                 if ( $currentbrowser === false ) {
3892                         // No User-Agent header sent? Trust it by default...
3893                         return true;
3894                 }
3895
3896                 foreach ( $wgBrowserBlackList as $browser ) {
3897                         if ( preg_match( $browser, $currentbrowser ) ) {
3898                                 return false;
3899                         }
3900                 }
3901                 return true;
3902         }
3903
3904         /**
3905          * Filter an input field through a Unicode de-armoring process if it
3906          * came from an old browser with known broken Unicode editing issues.
3907          *
3908          * @param WebRequest $request
3909          * @param string $field
3910          * @return string
3911          */
3912         protected function safeUnicodeInput( $request, $field ) {
3913                 $text = rtrim( $request->getText( $field ) );
3914                 return $request->getBool( 'safemode' )
3915                         ? $this->unmakeSafe( $text )
3916                         : $text;
3917         }
3918
3919         /**
3920          * Filter an output field through a Unicode armoring process if it is
3921          * going to an old browser with known broken Unicode editing issues.
3922          *
3923          * @param string $text
3924          * @return string
3925          */
3926         protected function safeUnicodeOutput( $text ) {
3927                 global $wgContLang;
3928                 $codedText = $wgContLang->recodeForEdit( $text );
3929                 return $this->checkUnicodeCompliantBrowser()
3930                         ? $codedText
3931                         : $this->makeSafe( $codedText );
3932         }
3933
3934         /**
3935          * A number of web browsers are known to corrupt non-ASCII characters
3936          * in a UTF-8 text editing environment. To protect against this,
3937          * detected browsers will be served an armored version of the text,
3938          * with non-ASCII chars converted to numeric HTML character references.
3939          *
3940          * Preexisting such character references will have a 0 added to them
3941          * to ensure that round-trips do not alter the original data.
3942          *
3943          * @param string $invalue
3944          * @return string
3945          */
3946         private function makeSafe( $invalue ) {
3947                 // Armor existing references for reversibility.
3948                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3949
3950                 $bytesleft = 0;
3951                 $result = "";
3952                 $working = 0;
3953                 $valueLength = strlen( $invalue );
3954                 for ( $i = 0; $i < $valueLength; $i++ ) {
3955                         $bytevalue = ord( $invalue[$i] );
3956                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3957                                 $result .= chr( $bytevalue );
3958                                 $bytesleft = 0;
3959                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3960                                 $working = $working << 6;
3961                                 $working += ( $bytevalue & 0x3F );
3962                                 $bytesleft--;
3963                                 if ( $bytesleft <= 0 ) {
3964                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3965                                 }
3966                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3967                                 $working = $bytevalue & 0x1F;
3968                                 $bytesleft = 1;
3969                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3970                                 $working = $bytevalue & 0x0F;
3971                                 $bytesleft = 2;
3972                         } else { // 1111 0xxx
3973                                 $working = $bytevalue & 0x07;
3974                                 $bytesleft = 3;
3975                         }
3976                 }
3977                 return $result;
3978         }
3979
3980         /**
3981          * Reverse the previously applied transliteration of non-ASCII characters
3982          * back to UTF-8. Used to protect data from corruption by broken web browsers
3983          * as listed in $wgBrowserBlackList.
3984          *
3985          * @param string $invalue
3986          * @return string
3987          */
3988         private function unmakeSafe( $invalue ) {
3989                 $result = "";
3990                 $valueLength = strlen( $invalue );
3991                 for ( $i = 0; $i < $valueLength; $i++ ) {
3992                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3993                                 $i += 3;
3994                                 $hexstring = "";
3995                                 do {
3996                                         $hexstring .= $invalue[$i];
3997                                         $i++;
3998                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3999
4000                                 // Do some sanity checks. These aren't needed for reversibility,
4001                                 // but should help keep the breakage down if the editor
4002                                 // breaks one of the entities whilst editing.
4003                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
4004                                         $codepoint = hexdec( $hexstring );
4005                                         $result .= codepointToUtf8( $codepoint );
4006                                 } else {
4007                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4008                                 }
4009                         } else {
4010                                 $result .= substr( $invalue, $i, 1 );
4011                         }
4012                 }
4013                 // reverse the transform that we made for reversibility reasons.
4014                 return strtr( $result, array( "&#x0" => "&#x" ) );
4015         }
4016 }