includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: can't parse content
 149          */
 150         const AS_PARSE_ERROR = 240;
 151
 152         /**
 153          * HTML id and name for the beginning of the edit form.
 154          */
 155         const EDITFORM_ID = 'editform';
 156
 157         /**
 158          * Prefix of key for cookie used to pass post-edit state.
 159          * The revision id edited is added after this
 160          */
 161         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 162
 163         /**
 164          * Duration of PostEdit cookie, in seconds.
 165          * The cookie will be removed instantly if the JavaScript runs.
 166          *
 167          * Otherwise, though, we don't want the cookies to accumulate.
 168          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 169          * limit of only 20 cookies per domain. This still applies at least to some
 170          * versions of IE without full updates:
 171          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 172          *
 173          * A value of 20 minutes should be enough to take into account slow loads and minor
 174          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 175          */
 176         const POST_EDIT_COOKIE_DURATION = 1200;
 177
 178         /** @var Article */
 179         public $mArticle;
 180
 181         /** @var Title */
 182         public $mTitle;
 183
 184         /** @var null|Title */
 185         private $mContextTitle = null;
 186
 187         /** @var string */
 188         protected $action = 'submit';
 189
 190         /** @var bool */
 191         public $isConflict = false;
 192
 193         /** @var bool */
 194         public $isCssJsSubpage = false;
 195
 196         /** @var bool */
 197         public $isCssSubpage = false;
 198
 199         /** @var bool */
 200         public $isJsSubpage = false;
 201
 202         /** @var bool */
 203         protected $isWrongCaseCssJsPage = false;
 204
 205         /** @var bool New page or new section */
 206         protected $isNew = false;
 207
 208         /** @var bool */
 209         protected $deletedSinceEdit;
 210
 211         /** @var string */
 212         public $formtype;
 213
 214         /** @var bool */
 215         public $firsttime;
 216
 217         /** @var bool|stdClass */
 218         protected $lastDelete;
 219
 220         /** @var bool */
 221         protected $mTokenOk = false;
 222
 223         /** @var bool */
 224         protected $mTokenOkExceptSuffix = false;
 225
 226         /** @var bool */
 227         protected $mTriedSave = false;
 228
 229         /** @var bool */
 230         protected $incompleteForm = false;
 231
 232         /** @var bool */
 233         protected $tooBig = false;
 234
 235         /** @var bool */
 236         protected $kblength = false;
 237
 238         /** @var bool */
 239         protected $missingComment = false;
 240
 241         /** @var bool */
 242         protected $missingSummary = false;
 243
 244         /** @var bool */
 245         protected $allowBlankSummary = false;
 246
 247         /** @var bool */
 248         protected $blankArticle = false;
 249
 250         /** @var bool */
 251         protected $allowBlankArticle = false;
 252
 253         /** @var string */
 254         protected $autoSumm = '';
 255
 256         /** @var string */
 257         public $hookError = '';
 258
 259         /** @var ParserOutput */
 260         protected $mParserOutput;
 261
 262         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 263         protected $hasPresetSummary = false;
 264
 265         /** @var bool */
 266         protected $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         protected $diff = false;
 281
 282         /** @var bool */
 283         public $minoredit = false;
 284
 285         /** @var bool */
 286         protected $watchthis = false;
 287
 288         /** @var bool */
 289         protected $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         protected $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         protected $starttime = '';
 314
 315         /** @var int */
 316         public $oldid = 0;
 317
 318         /** @var string */
 319         protected $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                 } else {
1472                         return $this->summary;
1473                 }
1474         }
1475
1476         /**
1477          * Attempt submission (no UI)
1478          *
1479          * @param array $result Array to add statuses to, currently with the
1480          *   possible keys:
1481          *   - spam (string): Spam string from content if any spam is detected by
1482          *     matchSpamRegex.
1483          *   - sectionanchor (string): Section anchor for a section save.
1484          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1485          *     false otherwise.
1486          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1487          *     revision is a redirect.
1488          * @param bool $bot True if edit is being made under the bot right.
1489          *
1490          * @return Status Status object, possibly with a message, but always with
1491          *   one of the AS_* constants in $status->value,
1492          *
1493          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1494          *   various error display idiosyncrasies. There are also lots of cases
1495          *   where error metadata is set in the object and retrieved later instead
1496          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1497          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1498          * time.
1499          */
1500         function internalAttemptSave( &$result, $bot = false ) {
1501                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1502
1503                 $status = Status::newGood();
1504
1505                 wfProfileIn( __METHOD__ );
1506                 wfProfileIn( __METHOD__ . '-checks' );
1507
1508                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1509                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1510                         $status->fatal( 'hookaborted' );
1511                         $status->value = self::AS_HOOK_ERROR;
1512                         wfProfileOut( __METHOD__ . '-checks' );
1513                         wfProfileOut( __METHOD__ );
1514                         return $status;
1515                 }
1516
1517                 $spam = $wgRequest->getText( 'wpAntispam' );
1518                 if ( $spam !== '' ) {
1519                         wfDebugLog(
1520                                 'SimpleAntiSpam',
1521                                 $wgUser->getName() .
1522                                 ' editing "' .
1523                                 $this->mTitle->getPrefixedText() .
1524                                 '" submitted bogus field "' .
1525                                 $spam .
1526                                 '"'
1527                         );
1528                         $status->fatal( 'spamprotectionmatch', false );
1529                         $status->value = self::AS_SPAM_ERROR;
1530                         wfProfileOut( __METHOD__ . '-checks' );
1531                         wfProfileOut( __METHOD__ );
1532                         return $status;
1533                 }
1534
1535                 try {
1536                         # Construct Content object
1537                         $textbox_content = $this->toEditContent( $this->textbox1 );
1538                 } catch ( MWContentSerializationException $ex ) {
1539                         $status->fatal(
1540                                 'content-failed-to-parse',
1541                                 $this->contentModel,
1542                                 $this->contentFormat,
1543                                 $ex->getMessage()
1544                         );
1545                         $status->value = self::AS_PARSE_ERROR;
1546                         wfProfileOut( __METHOD__ . '-checks' );
1547                         wfProfileOut( __METHOD__ );
1548                         return $status;
1549                 }
1550
1551                 # Check image redirect
1552                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1553                         $textbox_content->isRedirect() &&
1554                         !$wgUser->isAllowed( 'upload' )
1555                 ) {
1556                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1557                                 $status->setResult( false, $code );
1558
1559                                 wfProfileOut( __METHOD__ . '-checks' );
1560                                 wfProfileOut( __METHOD__ );
1561
1562                                 return $status;
1563                 }
1564
1565                 # Check for spam
1566                 $match = self::matchSummarySpamRegex( $this->summary );
1567                 if ( $match === false && $this->section == 'new' ) {
1568                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1569                         # regular summaries, it is added to the actual wikitext.
1570                         if ( $this->sectiontitle !== '' ) {
1571                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1572                                 $match = self::matchSpamRegex( $this->sectiontitle );
1573                         } else {
1574                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1575                                 # is used with the 'summary' parameter.
1576                                 $match = self::matchSpamRegex( $this->summary );
1577                         }
1578                 }
1579                 if ( $match === false ) {
1580                         $match = self::matchSpamRegex( $this->textbox1 );
1581                 }
1582                 if ( $match !== false ) {
1583                         $result['spam'] = $match;
1584                         $ip = $wgRequest->getIP();
1585                         $pdbk = $this->mTitle->getPrefixedDBkey();
1586                         $match = str_replace( "\n", '', $match );
1587                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1588                         $status->fatal( 'spamprotectionmatch', $match );
1589                         $status->value = self::AS_SPAM_ERROR;
1590                         wfProfileOut( __METHOD__ . '-checks' );
1591                         wfProfileOut( __METHOD__ );
1592                         return $status;
1593                 }
1594                 if ( !wfRunHooks(
1595                         'EditFilter',
1596                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1597                 ) {
1598                         # Error messages etc. could be handled within the hook...
1599                         $status->fatal( 'hookaborted' );
1600                         $status->value = self::AS_HOOK_ERROR;
1601                         wfProfileOut( __METHOD__ . '-checks' );
1602                         wfProfileOut( __METHOD__ );
1603                         return $status;
1604                 } elseif ( $this->hookError != '' ) {
1605                         # ...or the hook could be expecting us to produce an error
1606                         $status->fatal( 'hookaborted' );
1607                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1608                         wfProfileOut( __METHOD__ . '-checks' );
1609                         wfProfileOut( __METHOD__ );
1610                         return $status;
1611                 }
1612
1613                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1614                         // Auto-block user's IP if the account was "hard" blocked
1615                         $wgUser->spreadAnyEditBlock();
1616                         # Check block state against master, thus 'false'.
1617                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1618                         wfProfileOut( __METHOD__ . '-checks' );
1619                         wfProfileOut( __METHOD__ );
1620                         return $status;
1621                 }
1622
1623                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1624                 if ( $this->kblength > $wgMaxArticleSize ) {
1625                         // Error will be displayed by showEditForm()
1626                         $this->tooBig = true;
1627                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1628                         wfProfileOut( __METHOD__ . '-checks' );
1629                         wfProfileOut( __METHOD__ );
1630                         return $status;
1631                 }
1632
1633                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1634                         if ( $wgUser->isAnon() ) {
1635                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1636                                 wfProfileOut( __METHOD__ . '-checks' );
1637                                 wfProfileOut( __METHOD__ );
1638                                 return $status;
1639                         } else {
1640                                 $status->fatal( 'readonlytext' );
1641                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1642                                 wfProfileOut( __METHOD__ . '-checks' );
1643                                 wfProfileOut( __METHOD__ );
1644                                 return $status;
1645                         }
1646                 }
1647
1648                 if ( wfReadOnly() ) {
1649                         $status->fatal( 'readonlytext' );
1650                         $status->value = self::AS_READ_ONLY_PAGE;
1651                         wfProfileOut( __METHOD__ . '-checks' );
1652                         wfProfileOut( __METHOD__ );
1653                         return $status;
1654                 }
1655                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1656                         $status->fatal( 'actionthrottledtext' );
1657                         $status->value = self::AS_RATE_LIMITED;
1658                         wfProfileOut( __METHOD__ . '-checks' );
1659                         wfProfileOut( __METHOD__ );
1660                         return $status;
1661                 }
1662
1663                 # If the article has been deleted while editing, don't save it without
1664                 # confirmation
1665                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1666                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1667                         wfProfileOut( __METHOD__ . '-checks' );
1668                         wfProfileOut( __METHOD__ );
1669                         return $status;
1670                 }
1671
1672                 wfProfileOut( __METHOD__ . '-checks' );
1673
1674                 # Load the page data from the master. If anything changes in the meantime,
1675                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1676                 $this->mArticle->loadPageData( 'fromdbmaster' );
1677                 $new = !$this->mArticle->exists();
1678
1679                 if ( $new ) {
1680                         // Late check for create permission, just in case *PARANOIA*
1681                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1682                                 $status->fatal( 'nocreatetext' );
1683                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1684                                 wfDebug( __METHOD__ . ": no create permission\n" );
1685                                 wfProfileOut( __METHOD__ );
1686                                 return $status;
1687                         }
1688
1689                         // Don't save a new page if it's blank or if it's a MediaWiki:
1690                         // message with content equivalent to default (allow empty pages
1691                         // in this case to disable messages, see bug 50124)
1692                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1693                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1694                                 $defaultText = $defaultMessageText;
1695                         } else {
1696                                 $defaultText = '';
1697                         }
1698
1699                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1700                                 $this->blankArticle = true;
1701                                 $status->fatal( 'blankarticle' );
1702                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1703                                 wfProfileOut( __METHOD__ );
1704                                 return $status;
1705                         }
1706
1707                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1708                                 wfProfileOut( __METHOD__ );
1709                                 return $status;
1710                         }
1711
1712                         $content = $textbox_content;
1713
1714                         $result['sectionanchor'] = '';
1715                         if ( $this->section == 'new' ) {
1716                                 if ( $this->sectiontitle !== '' ) {
1717                                         // Insert the section title above the content.
1718                                         $content = $content->addSectionHeader( $this->sectiontitle );
1719                                 } elseif ( $this->summary !== '' ) {
1720                                         // Insert the section title above the content.
1721                                         $content = $content->addSectionHeader( $this->summary );
1722                                 }
1723                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1724                         }
1725
1726                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1727
1728                 } else { # not $new
1729
1730                         # Article exists. Check for edit conflict.
1731
1732                         $this->mArticle->clear(); # Force reload of dates, etc.
1733                         $timestamp = $this->mArticle->getTimestamp();
1734
1735                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1736
1737                         if ( $timestamp != $this->edittime ) {
1738                                 $this->isConflict = true;
1739                                 if ( $this->section == 'new' ) {
1740                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1741                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1742                                         ) {
1743                                                 // Probably a duplicate submission of a new comment.
1744                                                 // This can happen when squid resends a request after
1745                                                 // a timeout but the first one actually went through.
1746                                                 wfDebug( __METHOD__
1747                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1748                                         } else {
1749                                                 // New comment; suppress conflict.
1750                                                 $this->isConflict = false;
1751                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1752                                         }
1753                                 } elseif ( $this->section == ''
1754                                         && Revision::userWasLastToEdit(
1755                                                 DB_MASTER, $this->mTitle->getArticleID(),
1756                                                 $wgUser->getId(), $this->edittime
1757                                         )
1758                                 ) {
1759                                         # Suppress edit conflict with self, except for section edits where merging is required.
1760                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1761                                         $this->isConflict = false;
1762                                 }
1763                         }
1764
1765                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1766                         if ( $this->sectiontitle !== '' ) {
1767                                 $sectionTitle = $this->sectiontitle;
1768                         } else {
1769                                 $sectionTitle = $this->summary;
1770                         }
1771
1772                         $content = null;
1773
1774                         if ( $this->isConflict ) {
1775                                 wfDebug( __METHOD__
1776                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1777                                         . " (article time '{$timestamp}')\n" );
1778
1779                                 $content = $this->mArticle->replaceSectionContent(
1780                                         $this->section,
1781                                         $textbox_content,
1782                                         $sectionTitle,
1783                                         $this->edittime
1784                                 );
1785                         } else {
1786                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1787                                 $content = $this->mArticle->replaceSectionContent(
1788                                         $this->section,
1789                                         $textbox_content,
1790                                         $sectionTitle
1791                                 );
1792                         }
1793
1794                         if ( is_null( $content ) ) {
1795                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1796                                 $this->isConflict = true;
1797                                 $content = $textbox_content; // do not try to merge here!
1798                         } elseif ( $this->isConflict ) {
1799                                 # Attempt merge
1800                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1801                                         // Successful merge! Maybe we should tell the user the good news?
1802                                         $this->isConflict = false;
1803                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1804                                 } else {
1805                                         $this->section = '';
1806                                         $this->textbox1 = ContentHandler::getContentText( $content );
1807                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1808                                 }
1809                         }
1810
1811                         if ( $this->isConflict ) {
1812                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1813                                 wfProfileOut( __METHOD__ );
1814                                 return $status;
1815                         }
1816
1817                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1818                                 wfProfileOut( __METHOD__ );
1819                                 return $status;
1820                         }
1821
1822                         if ( $this->section == 'new' ) {
1823                                 // Handle the user preference to force summaries here
1824                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1825                                         $this->missingSummary = true;
1826                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1827                                         $status->value = self::AS_SUMMARY_NEEDED;
1828                                         wfProfileOut( __METHOD__ );
1829                                         return $status;
1830                                 }
1831
1832                                 // Do not allow the user to post an empty comment
1833                                 if ( $this->textbox1 == '' ) {
1834                                         $this->missingComment = true;
1835                                         $status->fatal( 'missingcommenttext' );
1836                                         $status->value = self::AS_TEXTBOX_EMPTY;
1837                                         wfProfileOut( __METHOD__ );
1838                                         return $status;
1839                                 }
1840                         } elseif ( !$this->allowBlankSummary
1841                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1842                                 && !$content->isRedirect()
1843                                 && md5( $this->summary ) == $this->autoSumm
1844                         ) {
1845                                 $this->missingSummary = true;
1846                                 $status->fatal( 'missingsummary' );
1847                                 $status->value = self::AS_SUMMARY_NEEDED;
1848                                 wfProfileOut( __METHOD__ );
1849                                 return $status;
1850                         }
1851
1852                         # All's well
1853                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1854                         $sectionanchor = '';
1855                         if ( $this->section == 'new' ) {
1856                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1857                         } elseif ( $this->section != '' ) {
1858                                 # Try to get a section anchor from the section source, redirect
1859                                 # to edited section if header found.
1860                                 # XXX: Might be better to integrate this into Article::replaceSection
1861                                 # for duplicate heading checking and maybe parsing.
1862                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1863                                 # We can't deal with anchors, includes, html etc in the header for now,
1864                                 # headline would need to be parsed to improve this.
1865                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1866                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1867                                 }
1868                         }
1869                         $result['sectionanchor'] = $sectionanchor;
1870                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1871
1872                         // Save errors may fall down to the edit form, but we've now
1873                         // merged the section into full text. Clear the section field
1874                         // so that later submission of conflict forms won't try to
1875                         // replace that into a duplicated mess.
1876                         $this->textbox1 = $this->toEditText( $content );
1877                         $this->section = '';
1878
1879                         $status->value = self::AS_SUCCESS_UPDATE;
1880                 }
1881
1882                 // Check for length errors again now that the section is merged in
1883                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1884                 if ( $this->kblength > $wgMaxArticleSize ) {
1885                         $this->tooBig = true;
1886                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1887                         wfProfileOut( __METHOD__ );
1888                         return $status;
1889                 }
1890
1891                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1892                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1893                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1894                         ( $bot ? EDIT_FORCE_BOT : 0 );
1895
1896                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1897                                                                                                                 false, null, $this->contentFormat );
1898
1899                 if ( !$doEditStatus->isOK() ) {
1900                         // Failure from doEdit()
1901                         // Show the edit conflict page for certain recognized errors from doEdit(),
1902                         // but don't show it for errors from extension hooks
1903                         $errors = $doEditStatus->getErrorsArray();
1904                         if ( in_array( $errors[0][0],
1905                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1906                         ) {
1907                                 $this->isConflict = true;
1908                                 // Destroys data doEdit() put in $status->value but who cares
1909                                 $doEditStatus->value = self::AS_END;
1910                         }
1911                         wfProfileOut( __METHOD__ );
1912                         return $doEditStatus;
1913                 }
1914
1915                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1916                 if ( $result['nullEdit'] ) {
1917                         // We don't know if it was a null edit until now, so increment here
1918                         $wgUser->pingLimiter( 'linkpurge' );
1919                 }
1920                 $result['redirect'] = $content->isRedirect();
1921                 $this->updateWatchlist();
1922                 wfProfileOut( __METHOD__ );
1923                 return $status;
1924         }
1925
1926         /**
1927          * Register the change of watch status
1928          */
1929         protected function updateWatchlist() {
1930                 global $wgUser;
1931
1932                 if ( $wgUser->isLoggedIn()
1933                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1934                 ) {
1935                         $fname = __METHOD__;
1936                         $title = $this->mTitle;
1937                         $watch = $this->watchthis;
1938
1939                         // Do this in its own transaction to reduce contention...
1940                         $dbw = wfGetDB( DB_MASTER );
1941                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1942                                 $dbw->begin( $fname );
1943                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1944                                 $dbw->commit( $fname );
1945                         } );
1946                 }
1947         }
1948
1949         /**
1950          * Attempts to do 3-way merge of edit content with a base revision
1951          * and current content, in case of edit conflict, in whichever way appropriate
1952          * for the content type.
1953          *
1954          * @since 1.21
1955          *
1956          * @param Content $editContent
1957          *
1958          * @return bool
1959          */
1960         private function mergeChangesIntoContent( &$editContent ) {
1961                 wfProfileIn( __METHOD__ );
1962
1963                 $db = wfGetDB( DB_MASTER );
1964
1965                 // This is the revision the editor started from
1966                 $baseRevision = $this->getBaseRevision();
1967                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1968
1969                 if ( is_null( $baseContent ) ) {
1970                         wfProfileOut( __METHOD__ );
1971                         return false;
1972                 }
1973
1974                 // The current state, we want to merge updates into it
1975                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1976                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1977
1978                 if ( is_null( $currentContent ) ) {
1979                         wfProfileOut( __METHOD__ );
1980                         return false;
1981                 }
1982
1983                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1984
1985                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1986
1987                 if ( $result ) {
1988                         $editContent = $result;
1989                         wfProfileOut( __METHOD__ );
1990                         return true;
1991                 }
1992
1993                 wfProfileOut( __METHOD__ );
1994                 return false;
1995         }
1996
1997         /**
1998          * @return Revision
1999          */
2000         function getBaseRevision() {
2001                 if ( !$this->mBaseRevision ) {
2002                         $db = wfGetDB( DB_MASTER );
2003                         $this->mBaseRevision = Revision::loadFromTimestamp(
2004                                 $db, $this->mTitle, $this->edittime );
2005                 }
2006                 return $this->mBaseRevision;
2007         }
2008
2009         /**
2010          * Check given input text against $wgSpamRegex, and return the text of the first match.
2011          *
2012          * @param string $text
2013          *
2014          * @return string|bool Matching string or false
2015          */
2016         public static function matchSpamRegex( $text ) {
2017                 global $wgSpamRegex;
2018                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2019                 $regexes = (array)$wgSpamRegex;
2020                 return self::matchSpamRegexInternal( $text, $regexes );
2021         }
2022
2023         /**
2024          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2025          *
2026          * @param string $text
2027          *
2028          * @return string|bool Matching string or false
2029          */
2030         public static function matchSummarySpamRegex( $text ) {
2031                 global $wgSummarySpamRegex;
2032                 $regexes = (array)$wgSummarySpamRegex;
2033                 return self::matchSpamRegexInternal( $text, $regexes );
2034         }
2035
2036         /**
2037          * @param string $text
2038          * @param array $regexes
2039          * @return bool|string
2040          */
2041         protected static function matchSpamRegexInternal( $text, $regexes ) {
2042                 foreach ( $regexes as $regex ) {
2043                         $matches = array();
2044                         if ( preg_match( $regex, $text, $matches ) ) {
2045                                 return $matches[0];
2046                         }
2047                 }
2048                 return false;
2049         }
2050
2051         function setHeaders() {
2052                 global $wgOut, $wgUser;
2053
2054                 $wgOut->addModules( 'mediawiki.action.edit' );
2055                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2056
2057                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2058                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2059                 }
2060
2061                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2062                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2063                 }
2064
2065                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2066
2067                 # Enabled article-related sidebar, toplinks, etc.
2068                 $wgOut->setArticleRelated( true );
2069
2070                 $contextTitle = $this->getContextTitle();
2071                 if ( $this->isConflict ) {
2072                         $msg = 'editconflict';
2073                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2074                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2075                 } else {
2076                         $msg = $contextTitle->exists()
2077                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2078                                         && $contextTitle->getDefaultMessageText() !== false
2079                                 )
2080                                 ? 'editing'
2081                                 : 'creating';
2082                 }
2083
2084                 # Use the title defined by DISPLAYTITLE magic word when present
2085                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2086                 if ( $displayTitle === false ) {
2087                         $displayTitle = $contextTitle->getPrefixedText();
2088                 }
2089                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2090         }
2091
2092         /**
2093          * Show all applicable editing introductions
2094          */
2095         protected function showIntro() {
2096                 global $wgOut, $wgUser;
2097                 if ( $this->suppressIntro ) {
2098                         return;
2099                 }
2100
2101                 $namespace = $this->mTitle->getNamespace();
2102
2103                 if ( $namespace == NS_MEDIAWIKI ) {
2104                         # Show a warning if editing an interface message
2105                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2106                 } elseif ( $namespace == NS_FILE ) {
2107                         # Show a hint to shared repo
2108                         $file = wfFindFile( $this->mTitle );
2109                         if ( $file && !$file->isLocal() ) {
2110                                 $descUrl = $file->getDescriptionUrl();
2111                                 # there must be a description url to show a hint to shared repo
2112                                 if ( $descUrl ) {
2113                                         if ( !$this->mTitle->exists() ) {
2114                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2115                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2116                                                 ) );
2117                                         } else {
2118                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2119                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2120                                                 ) );
2121                                         }
2122                                 }
2123                         }
2124                 }
2125
2126                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2127                 # Show log extract when the user is currently blocked
2128                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2129                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2130                         $username = $parts[0];
2131                         $user = User::newFromName( $username, false /* allow IP users*/ );
2132                         $ip = User::isIP( $username );
2133                         $block = Block::newFromTarget( $user, $user );
2134                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2135                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2136                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2137                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) { # Show log extract if the user is currently blocked
2138                                 LogEventsList::showLogExtract(
2139                                         $wgOut,
2140                                         'block',
2141                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2142                                         '',
2143                                         array(
2144                                                 'lim' => 1,
2145                                                 'showIfEmpty' => false,
2146                                                 'msgKey' => array(
2147                                                         'blocked-notice-logextract',
2148                                                         $user->getName() # Support GENDER in notice
2149                                                 )
2150                                         )
2151                                 );
2152                         }
2153                 }
2154                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2155                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2156                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2157                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2158                         ) );
2159                         if ( $wgUser->isLoggedIn() ) {
2160                                 $wgOut->wrapWikiMsg(
2161                                         // Suppress the external link icon, consider the help url an internal one
2162                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2163                                         array(
2164                                                 'newarticletext',
2165                                                 $helpLink
2166                                         )
2167                                 );
2168                         } else {
2169                                 $wgOut->wrapWikiMsg(
2170                                         // Suppress the external link icon, consider the help url an internal one
2171                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2172                                         array(
2173                                                 'newarticletextanon',
2174                                                 $helpLink
2175                                         )
2176                                 );
2177                         }
2178                 }
2179                 # Give a notice if the user is editing a deleted/moved page...
2180                 if ( !$this->mTitle->exists() ) {
2181                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2182                                 '',
2183                                 array(
2184                                         'lim' => 10,
2185                                         'conds' => array( "log_action != 'revision'" ),
2186                                         'showIfEmpty' => false,
2187                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2188                                 )
2189                         );
2190                 }
2191         }
2192
2193         /**
2194          * Attempt to show a custom editing introduction, if supplied
2195          *
2196          * @return bool
2197          */
2198         protected function showCustomIntro() {
2199                 if ( $this->editintro ) {
2200                         $title = Title::newFromText( $this->editintro );
2201                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2202                                 global $wgOut;
2203                                 // Added using template syntax, to take <noinclude>'s into account.
2204                                 $wgOut->addWikiTextTitleTidy( '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>', $this->mTitle );
2205                                 return true;
2206                         }
2207                 }
2208                 return false;
2209         }
2210
2211         /**
2212          * Gets an editable textual representation of $content.
2213          * The textual representation can be turned by into a Content object by the
2214          * toEditContent() method.
2215          *
2216          * If $content is null or false or a string, $content is returned unchanged.
2217          *
2218          * If the given Content object is not of a type that can be edited using
2219          * the text base EditPage, an exception will be raised. Set
2220          * $this->allowNonTextContent to true to allow editing of non-textual
2221          * content.
2222          *
2223          * @param Content|null|bool|string $content
2224          * @return string The editable text form of the content.
2225          *
2226          * @throws MWException If $content is not an instance of TextContent and
2227          *   $this->allowNonTextContent is not true.
2228          */
2229         protected function toEditText( $content ) {
2230                 if ( $content === null || $content === false ) {
2231                         return $content;
2232                 }
2233
2234                 if ( is_string( $content ) ) {
2235                         return $content;
2236                 }
2237
2238                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2239                         throw new MWException( 'This content model is not supported: '
2240                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2241                 }
2242
2243                 return $content->serialize( $this->contentFormat );
2244         }
2245
2246         /**
2247          * Turns the given text into a Content object by unserializing it.
2248          *
2249          * If the resulting Content object is not of a type that can be edited using
2250          * the text base EditPage, an exception will be raised. Set
2251          * $this->allowNonTextContent to true to allow editing of non-textual
2252          * content.
2253          *
2254          * @param string|null|bool $text Text to unserialize
2255          * @return Content The content object created from $text. If $text was false
2256          *   or null, false resp. null will be  returned instead.
2257          *
2258          * @throws MWException If unserializing the text results in a Content
2259          *   object that is not an instance of TextContent and
2260          *   $this->allowNonTextContent is not true.
2261          */
2262         protected function toEditContent( $text ) {
2263                 if ( $text === false || $text === null ) {
2264                         return $text;
2265                 }
2266
2267                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2268                         $this->contentModel, $this->contentFormat );
2269
2270                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2271                         throw new MWException( 'This content model is not supported: '
2272                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2273                 }
2274
2275                 return $content;
2276         }
2277
2278         /**
2279          * Send the edit form and related headers to $wgOut
2280          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2281          *     during form output near the top, for captchas and the like.
2282          */
2283         function showEditForm( $formCallback = null ) {
2284                 global $wgOut, $wgUser;
2285
2286                 wfProfileIn( __METHOD__ );
2287
2288                 # need to parse the preview early so that we know which templates are used,
2289                 # otherwise users with "show preview after edit box" will get a blank list
2290                 # we parse this near the beginning so that setHeaders can do the title
2291                 # setting work instead of leaving it in getPreviewText
2292                 $previewOutput = '';
2293                 if ( $this->formtype == 'preview' ) {
2294                         $previewOutput = $this->getPreviewText();
2295                 }
2296
2297                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2298
2299                 $this->setHeaders();
2300
2301                 if ( $this->showHeader() === false ) {
2302                         wfProfileOut( __METHOD__ );
2303                         return;
2304                 }
2305
2306                 $wgOut->addHTML( $this->editFormPageTop );
2307
2308                 if ( $wgUser->getOption( 'previewontop' ) ) {
2309                         $this->displayPreviewArea( $previewOutput, true );
2310                 }
2311
2312                 $wgOut->addHTML( $this->editFormTextTop );
2313
2314                 $showToolbar = true;
2315                 if ( $this->wasDeletedSinceLastEdit() ) {
2316                         if ( $this->formtype == 'save' ) {
2317                                 // Hide the toolbar and edit area, user can click preview to get it back
2318                                 // Add an confirmation checkbox and explanation.
2319                                 $showToolbar = false;
2320                         } else {
2321                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2322                                         'deletedwhileediting' );
2323                         }
2324                 }
2325
2326                 // @todo add EditForm plugin interface and use it here!
2327                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2328                 $wgOut->addHTML( Html::openElement(
2329                         'form',
2330                         array(
2331                                 'id' => self::EDITFORM_ID,
2332                                 'name' => self::EDITFORM_ID,
2333                                 'method' => 'post',
2334                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2335                                 'enctype' => 'multipart/form-data'
2336                         )
2337                 ) );
2338
2339                 if ( is_callable( $formCallback ) ) {
2340                         call_user_func_array( $formCallback, array( &$wgOut ) );
2341                 }
2342
2343                 // Add an empty field to trip up spambots
2344                 $wgOut->addHTML(
2345                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2346                         . Html::rawElement(
2347                                 'label',
2348                                 array( 'for' => 'wpAntiSpam' ),
2349                                 wfMessage( 'simpleantispam-label' )->parse()
2350                         )
2351                         . Xml::element(
2352                                 'input',
2353                                 array(
2354                                         'type' => 'text',
2355                                         'name' => 'wpAntispam',
2356                                         'id' => 'wpAntispam',
2357                                         'value' => ''
2358                                 )
2359                         )
2360                         . Xml::closeElement( 'div' )
2361                 );
2362
2363                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2364
2365                 // Put these up at the top to ensure they aren't lost on early form submission
2366                 $this->showFormBeforeText();
2367
2368                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2369                         $username = $this->lastDelete->user_name;
2370                         $comment = $this->lastDelete->log_comment;
2371
2372                         // It is better to not parse the comment at all than to have templates expanded in the middle
2373                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2374                         $key = $comment === ''
2375                                 ? 'confirmrecreate-noreason'
2376                                 : 'confirmrecreate';
2377                         $wgOut->addHTML(
2378                                 '<div class="mw-confirm-recreate">' .
2379                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2380                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2381                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2382                                 ) .
2383                                 '</div>'
2384                         );
2385                 }
2386
2387                 # When the summary is hidden, also hide them on preview/show changes
2388                 if ( $this->nosummary ) {
2389                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2390                 }
2391
2392                 # If a blank edit summary was previously provided, and the appropriate
2393                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2394                 # user being bounced back more than once in the event that a summary
2395                 # is not required.
2396                 #####
2397                 # For a bit more sophisticated detection of blank summaries, hash the
2398                 # automatic one and pass that in the hidden field wpAutoSummary.
2399                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2400                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2401                 }
2402
2403                 if ( $this->undidRev ) {
2404                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2405                 }
2406
2407                 if ( $this->hasPresetSummary ) {
2408                         // If a summary has been preset using &summary= we don't want to prompt for
2409                         // a different summary. Only prompt for a summary if the summary is blanked.
2410                         // (Bug 17416)
2411                         $this->autoSumm = md5( '' );
2412                 }
2413
2414                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2415                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2416
2417                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2418
2419                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2420                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2421
2422                 if ( $this->section == 'new' ) {
2423                         $this->showSummaryInput( true, $this->summary );
2424                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2425                 }
2426
2427                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2428
2429                 if ( $this->contentModel === CONTENT_MODEL_WIKITEXT &&
2430                         $showToolbar && $wgUser->getOption( 'showtoolbar' ) )
2431                 {
2432                         $wgOut->addHTML( EditPage::getEditToolbar() );
2433                 }
2434
2435                 if ( $this->blankArticle ) {
2436                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2437                 }
2438
2439                 if ( $this->isConflict ) {
2440                         // In an edit conflict bypass the overridable content form method
2441                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2442                         // resolved between page source edits and custom ui edits using the
2443                         // custom edit ui.
2444                         $this->textbox2 = $this->textbox1;
2445
2446                         $content = $this->getCurrentContent();
2447                         $this->textbox1 = $this->toEditText( $content );
2448
2449                         $this->showTextbox1();
2450                 } else {
2451                         $this->showContentForm();
2452                 }
2453
2454                 $wgOut->addHTML( $this->editFormTextAfterContent );
2455
2456                 $this->showStandardInputs();
2457
2458                 $this->showFormAfterText();
2459
2460                 $this->showTosSummary();
2461
2462                 $this->showEditTools();
2463
2464                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2465
2466                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2467                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2468
2469                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2470                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2471
2472                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2473                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2474
2475                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2476
2477                 if ( $this->isConflict ) {
2478                         try {
2479                                 $this->showConflict();
2480                         } catch ( MWContentSerializationException $ex ) {
2481                                 // this can't really happen, but be nice if it does.
2482                                 $msg = wfMessage(
2483                                         'content-failed-to-parse',
2484                                         $this->contentModel,
2485                                         $this->contentFormat,
2486                                         $ex->getMessage()
2487                                 );
2488                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2489                         }
2490                 }
2491
2492                 // Marker for detecting truncated form data.  This must be the last
2493                 // parameter sent in order to be of use, so do not move me.
2494                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2495                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2496
2497                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2498                         $this->displayPreviewArea( $previewOutput, false );
2499                 }
2500
2501                 wfProfileOut( __METHOD__ );
2502         }
2503
2504         /**
2505          * Extract the section title from current section text, if any.
2506          *
2507          * @param string $text
2508          * @return string|bool String or false
2509          */
2510         public static function extractSectionTitle( $text ) {
2511                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2512                 if ( !empty( $matches[2] ) ) {
2513                         global $wgParser;
2514                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2515                 } else {
2516                         return false;
2517                 }
2518         }
2519
2520         /**
2521          * @return bool
2522          */
2523         protected function showHeader() {
2524                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2525                 global $wgAllowUserCss, $wgAllowUserJs;
2526
2527                 if ( $this->mTitle->isTalkPage() ) {
2528                         $wgOut->addWikiMsg( 'talkpagetext' );
2529                 }
2530
2531                 // Add edit notices
2532                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2533
2534                 if ( $this->isConflict ) {
2535                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2536                         $this->edittime = $this->mArticle->getTimestamp();
2537                 } else {
2538                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2539                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2540                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2541                                 // Someone is welcome to try refactoring though
2542                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2543                                 return false;
2544                         }
2545
2546                         if ( $this->section != '' && $this->section != 'new' ) {
2547                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2548                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2549                                         if ( $sectionTitle !== false ) {
2550                                                 $this->summary = "/* $sectionTitle */ ";
2551                                         }
2552                                 }
2553                         }
2554
2555                         if ( $this->missingComment ) {
2556                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2557                         }
2558
2559                         if ( $this->missingSummary && $this->section != 'new' ) {
2560                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2561                         }
2562
2563                         if ( $this->missingSummary && $this->section == 'new' ) {
2564                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2565                         }
2566
2567                         if ( $this->blankArticle ) {
2568                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2569                         }
2570
2571                         if ( $this->hookError !== '' ) {
2572                                 $wgOut->addWikiText( $this->hookError );
2573                         }
2574
2575                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2576                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2577                         }
2578
2579                         if ( $this->section != 'new' ) {
2580                                 $revision = $this->mArticle->getRevisionFetched();
2581                                 if ( $revision ) {
2582                                         // Let sysop know that this will make private content public if saved
2583
2584                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2585                                                 $wgOut->wrapWikiMsg(
2586                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2587                                                         'rev-deleted-text-permission'
2588                                                 );
2589                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2590                                                 $wgOut->wrapWikiMsg(
2591                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2592                                                         'rev-deleted-text-view'
2593                                                 );
2594                                         }
2595
2596                                         if ( !$revision->isCurrent() ) {
2597                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2598                                                 $wgOut->addWikiMsg( 'editingold' );
2599                                         }
2600                                 } elseif ( $this->mTitle->exists() ) {
2601                                         // Something went wrong
2602
2603                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2604                                                 array( 'missing-revision', $this->oldid ) );
2605                                 }
2606                         }
2607                 }
2608
2609                 if ( wfReadOnly() ) {
2610                         $wgOut->wrapWikiMsg(
2611                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2612                                 array( 'readonlywarning', wfReadOnlyReason() )
2613                         );
2614                 } elseif ( $wgUser->isAnon() ) {
2615                         if ( $this->formtype != 'preview' ) {
2616                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2617                         } else {
2618                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2619                         }
2620                 } else {
2621                         if ( $this->isCssJsSubpage ) {
2622                                 # Check the skin exists
2623                                 if ( $this->isWrongCaseCssJsPage ) {
2624                                         $wgOut->wrapWikiMsg(
2625                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2626                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2627                                         );
2628                                 }
2629                                 if ( $this->formtype !== 'preview' ) {
2630                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2631                                                 $wgOut->wrapWikiMsg(
2632                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2633                                                         array( 'usercssyoucanpreview' )
2634                                                 );
2635                                         }
2636
2637                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2638                                                 $wgOut->wrapWikiMsg(
2639                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2640                                                         array( 'userjsyoucanpreview' )
2641                                                 );
2642                                         }
2643                                 }
2644                         }
2645                 }
2646
2647                 if ( $this->mTitle->isProtected( 'edit' ) &&
2648                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2649                 ) {
2650                         # Is the title semi-protected?
2651                         if ( $this->mTitle->isSemiProtected() ) {
2652                                 $noticeMsg = 'semiprotectedpagewarning';
2653                         } else {
2654                                 # Then it must be protected based on static groups (regular)
2655                                 $noticeMsg = 'protectedpagewarning';
2656                         }
2657                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2658                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2659                 }
2660                 if ( $this->mTitle->isCascadeProtected() ) {
2661                         # Is this page under cascading protection from some source pages?
2662                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2663                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2664                         $cascadeSourcesCount = count( $cascadeSources );
2665                         if ( $cascadeSourcesCount > 0 ) {
2666                                 # Explain, and list the titles responsible
2667                                 foreach ( $cascadeSources as $page ) {
2668                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2669                                 }
2670                         }
2671                         $notice .= '</div>';
2672                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2673                 }
2674                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2675                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2676                                 array( 'lim' => 1,
2677                                         'showIfEmpty' => false,
2678                                         'msgKey' => array( 'titleprotectedwarning' ),
2679                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2680                 }
2681
2682                 if ( $this->kblength === false ) {
2683                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2684                 }
2685
2686                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2687                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2688                                 array(
2689                                         'longpageerror',
2690                                         $wgLang->formatNum( $this->kblength ),
2691                                         $wgLang->formatNum( $wgMaxArticleSize )
2692                                 )
2693                         );
2694                 } else {
2695                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2696                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2697                                         array(
2698                                                 'longpage-hint',
2699                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2700                                                 strlen( $this->textbox1 )
2701                                         )
2702                                 );
2703                         }
2704                 }
2705                 # Add header copyright warning
2706                 $this->showHeaderCopyrightWarning();
2707
2708                 return true;
2709         }
2710
2711         /**
2712          * Standard summary input and label (wgSummary), abstracted so EditPage
2713          * subclasses may reorganize the form.
2714          * Note that you do not need to worry about the label's for=, it will be
2715          * inferred by the id given to the input. You can remove them both by
2716          * passing array( 'id' => false ) to $userInputAttrs.
2717          *
2718          * @param string $summary The value of the summary input
2719          * @param string $labelText The html to place inside the label
2720          * @param array $inputAttrs Array of attrs to use on the input
2721          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2722          *
2723          * @return array An array in the format array( $label, $input )
2724          */
2725         function getSummaryInput( $summary = "", $labelText = null,
2726                 $inputAttrs = null, $spanLabelAttrs = null
2727         ) {
2728                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2729                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2730                         'id' => 'wpSummary',
2731                         'maxlength' => '200',
2732                         'tabindex' => '1',
2733                         'size' => 60,
2734                         'spellcheck' => 'true',
2735                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2736
2737                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2738                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2739                         'id' => "wpSummaryLabel"
2740                 );
2741
2742                 $label = null;
2743                 if ( $labelText ) {
2744                         $label = Xml::tags(
2745                                 'label',
2746                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2747                                 $labelText
2748                         );
2749                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2750                 }
2751
2752                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2753
2754                 return array( $label, $input );
2755         }
2756
2757         /**
2758          * @param bool $isSubjectPreview True if this is the section subject/title
2759          *   up top, or false if this is the comment summary
2760          *   down below the textarea
2761          * @param string $summary The text of the summary to display
2762          * @return string
2763          */
2764         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2765                 global $wgOut, $wgContLang;
2766                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2767                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2768                 if ( $isSubjectPreview ) {
2769                         if ( $this->nosummary ) {
2770                                 return;
2771                         }
2772                 } else {
2773                         if ( !$this->mShowSummaryField ) {
2774                                 return;
2775                         }
2776                 }
2777                 $summary = $wgContLang->recodeForEdit( $summary );
2778                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2779                 list( $label, $input ) = $this->getSummaryInput(
2780                         $summary,
2781                         $labelText,
2782                         array( 'class' => $summaryClass ),
2783                         array()
2784                 );
2785                 $wgOut->addHTML( "{$label} {$input}" );
2786         }
2787
2788         /**
2789          * @param bool $isSubjectPreview True if this is the section subject/title
2790          *   up top, or false if this is the comment summary
2791          *   down below the textarea
2792          * @param string $summary The text of the summary to display
2793          * @return string
2794          */
2795         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2796                 // avoid spaces in preview, gets always trimmed on save
2797                 $summary = trim( $summary );
2798                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2799                         return "";
2800                 }
2801
2802                 global $wgParser;
2803
2804                 if ( $isSubjectPreview ) {
2805                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2806                                 ->inContentLanguage()->text();
2807                 }
2808
2809                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2810
2811                 $summary = wfMessage( $message )->parse()
2812                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2813                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2814         }
2815
2816         protected function showFormBeforeText() {
2817                 global $wgOut;
2818                 $section = htmlspecialchars( $this->section );
2819                 $wgOut->addHTML( <<<HTML
2820 <input type='hidden' value="{$section}" name="wpSection" />
2821 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2822 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2823 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2824
2825 HTML
2826                 );
2827                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2828                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2829                 }
2830         }
2831
2832         protected function showFormAfterText() {
2833                 global $wgOut, $wgUser;
2834                 /**
2835                  * To make it harder for someone to slip a user a page
2836                  * which submits an edit form to the wiki without their
2837                  * knowledge, a random token is associated with the login
2838                  * session. If it's not passed back with the submission,
2839                  * we won't save the page, or render user JavaScript and
2840                  * CSS previews.
2841                  *
2842                  * For anon editors, who may not have a session, we just
2843                  * include the constant suffix to prevent editing from
2844                  * broken text-mangling proxies.
2845                  */
2846                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2847         }
2848
2849         /**
2850          * Subpage overridable method for printing the form for page content editing
2851          * By default this simply outputs wpTextbox1
2852          * Subclasses can override this to provide a custom UI for editing;
2853          * be it a form, or simply wpTextbox1 with a modified content that will be
2854          * reverse modified when extracted from the post data.
2855          * Note that this is basically the inverse for importContentFormData
2856          */
2857         protected function showContentForm() {
2858                 $this->showTextbox1();
2859         }
2860
2861         /**
2862          * Method to output wpTextbox1
2863          * The $textoverride method can be used by subclasses overriding showContentForm
2864          * to pass back to this method.
2865          *
2866          * @param array $customAttribs Array of html attributes to use in the textarea
2867          * @param string $textoverride Optional text to override $this->textarea1 with
2868          */
2869         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2870                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2871                         $attribs = array( 'style' => 'display:none;' );
2872                 } else {
2873                         $classes = array(); // Textarea CSS
2874                         if ( $this->mTitle->isProtected( 'edit' ) &&
2875                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2876                         ) {
2877                                 # Is the title semi-protected?
2878                                 if ( $this->mTitle->isSemiProtected() ) {
2879                                         $classes[] = 'mw-textarea-sprotected';
2880                                 } else {
2881                                         # Then it must be protected based on static groups (regular)
2882                                         $classes[] = 'mw-textarea-protected';
2883                                 }
2884                                 # Is the title cascade-protected?
2885                                 if ( $this->mTitle->isCascadeProtected() ) {
2886                                         $classes[] = 'mw-textarea-cprotected';
2887                                 }
2888                         }
2889
2890                         $attribs = array( 'tabindex' => 1 );
2891
2892                         if ( is_array( $customAttribs ) ) {
2893                                 $attribs += $customAttribs;
2894                         }
2895
2896                         if ( count( $classes ) ) {
2897                                 if ( isset( $attribs['class'] ) ) {
2898                                         $classes[] = $attribs['class'];
2899                                 }
2900                                 $attribs['class'] = implode( ' ', $classes );
2901                         }
2902                 }
2903
2904                 $this->showTextbox(
2905                         $textoverride !== null ? $textoverride : $this->textbox1,
2906                         'wpTextbox1',
2907                         $attribs
2908                 );
2909         }
2910
2911         protected function showTextbox2() {
2912                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2913         }
2914
2915         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2916                 global $wgOut, $wgUser;
2917
2918                 $wikitext = $this->safeUnicodeOutput( $text );
2919                 if ( strval( $wikitext ) !== '' ) {
2920                         // Ensure there's a newline at the end, otherwise adding lines
2921                         // is awkward.
2922                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2923                         // mode will show an extra newline. A bit annoying.
2924                         $wikitext .= "\n";
2925                 }
2926
2927                 $attribs = $customAttribs + array(
2928                         'accesskey' => ',',
2929                         'id' => $name,
2930                         'cols' => $wgUser->getIntOption( 'cols' ),
2931                         'rows' => $wgUser->getIntOption( 'rows' ),
2932                         // Avoid PHP notices when appending preferences
2933                         // (appending allows customAttribs['style'] to still work).
2934                         'style' => ''
2935                 );
2936
2937                 $pageLang = $this->mTitle->getPageLanguage();
2938                 $attribs['lang'] = $pageLang->getCode();
2939                 $attribs['dir'] = $pageLang->getDir();
2940
2941                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2942         }
2943
2944         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2945                 global $wgOut;
2946                 $classes = array();
2947                 if ( $isOnTop ) {
2948                         $classes[] = 'ontop';
2949                 }
2950
2951                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2952
2953                 if ( $this->formtype != 'preview' ) {
2954                         $attribs['style'] = 'display: none;';
2955                 }
2956
2957                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2958
2959                 if ( $this->formtype == 'preview' ) {
2960                         $this->showPreview( $previewOutput );
2961                 }
2962
2963                 $wgOut->addHTML( '</div>' );
2964
2965                 if ( $this->formtype == 'diff' ) {
2966                         try {
2967                                 $this->showDiff();
2968                         } catch ( MWContentSerializationException $ex ) {
2969                                 $msg = wfMessage(
2970                                         'content-failed-to-parse',
2971                                         $this->contentModel,
2972                                         $this->contentFormat,
2973                                         $ex->getMessage()
2974                                 );
2975                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2976                         }
2977                 }
2978         }
2979
2980         /**
2981          * Append preview output to $wgOut.
2982          * Includes category rendering if this is a category page.
2983          *
2984          * @param string $text The HTML to be output for the preview.
2985          */
2986         protected function showPreview( $text ) {
2987                 global $wgOut;
2988                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2989                         $this->mArticle->openShowCategory();
2990                 }
2991                 # This hook seems slightly odd here, but makes things more
2992                 # consistent for extensions.
2993                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2994                 $wgOut->addHTML( $text );
2995                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2996                         $this->mArticle->closeShowCategory();
2997                 }
2998         }
2999
3000         /**
3001          * Get a diff between the current contents of the edit box and the
3002          * version of the page we're editing from.
3003          *
3004          * If this is a section edit, we'll replace the section as for final
3005          * save and then make a comparison.
3006          */
3007         function showDiff() {
3008                 global $wgUser, $wgContLang, $wgOut;
3009
3010                 $oldtitlemsg = 'currentrev';
3011                 # if message does not exist, show diff against the preloaded default
3012                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3013                         $oldtext = $this->mTitle->getDefaultMessageText();
3014                         if ( $oldtext !== false ) {
3015                                 $oldtitlemsg = 'defaultmessagetext';
3016                                 $oldContent = $this->toEditContent( $oldtext );
3017                         } else {
3018                                 $oldContent = null;
3019                         }
3020                 } else {
3021                         $oldContent = $this->getCurrentContent();
3022                 }
3023
3024                 $textboxContent = $this->toEditContent( $this->textbox1 );
3025
3026                 $newContent = $this->mArticle->replaceSectionContent(
3027                                                         $this->section, $textboxContent,
3028                                                         $this->summary, $this->edittime );
3029
3030                 if ( $newContent ) {
3031                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3032                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3033
3034                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3035                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3036                 }
3037
3038                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3039                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3040                         $newtitle = wfMessage( 'yourtext' )->parse();
3041
3042                         if ( !$oldContent ) {
3043                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3044                         }
3045
3046                         if ( !$newContent ) {
3047                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3048                         }
3049
3050                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3051                         $de->setContent( $oldContent, $newContent );
3052
3053                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3054                         $de->showDiffStyle();
3055                 } else {
3056                         $difftext = '';
3057                 }
3058
3059                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3060         }
3061
3062         /**
3063          * Show the header copyright warning.
3064          */
3065         protected function showHeaderCopyrightWarning() {
3066                 $msg = 'editpage-head-copy-warn';
3067                 if ( !wfMessage( $msg )->isDisabled() ) {
3068                         global $wgOut;
3069                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3070                                 'editpage-head-copy-warn' );
3071                 }
3072         }
3073
3074         /**
3075          * Give a chance for site and per-namespace customizations of
3076          * terms of service summary link that might exist separately
3077          * from the copyright notice.
3078          *
3079          * This will display between the save button and the edit tools,
3080          * so should remain short!
3081          */
3082         protected function showTosSummary() {
3083                 $msg = 'editpage-tos-summary';
3084                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3085                 if ( !wfMessage( $msg )->isDisabled() ) {
3086                         global $wgOut;
3087                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3088                         $wgOut->addWikiMsg( $msg );
3089                         $wgOut->addHTML( '</div>' );
3090                 }
3091         }
3092
3093         protected function showEditTools() {
3094                 global $wgOut;
3095                 $wgOut->addHTML( '<div class="mw-editTools">' .
3096                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3097                         '</div>' );
3098         }
3099
3100         /**
3101          * Get the copyright warning
3102          *
3103          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3104          */
3105         protected function getCopywarn() {
3106                 return self::getCopyrightWarning( $this->mTitle );
3107         }
3108
3109         /**
3110          * Get the copyright warning, by default returns wikitext
3111          *
3112          * @param Title $title
3113          * @param string $format Output format, valid values are any function of a Message object
3114          * @return string
3115          */
3116         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3117                 global $wgRightsText;
3118                 if ( $wgRightsText ) {
3119                         $copywarnMsg = array( 'copyrightwarning',
3120                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3121                                 $wgRightsText );
3122                 } else {
3123                         $copywarnMsg = array( 'copyrightwarning2',
3124                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3125                 }
3126                 // Allow for site and per-namespace customization of contribution/copyright notice.
3127                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3128
3129                 return "<div id=\"editpage-copywarn\">\n" .
3130                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3131         }
3132
3133         /**
3134          * Get the Limit report for page previews
3135          *
3136          * @since 1.22
3137          * @param ParserOutput $output ParserOutput object from the parse
3138          * @return string HTML
3139          */
3140         public static function getPreviewLimitReport( $output ) {
3141                 if ( !$output || !$output->getLimitReportData() ) {
3142                         return '';
3143                 }
3144
3145                 wfProfileIn( __METHOD__ );
3146
3147                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3148                         wfMessage( 'limitreport-title' )->parseAsBlock()
3149                 );
3150
3151                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3152                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3153
3154                 $limitReport .= Html::openElement( 'table', array(
3155                         'class' => 'preview-limit-report wikitable'
3156                 ) ) .
3157                         Html::openElement( 'tbody' );
3158
3159                 foreach ( $output->getLimitReportData() as $key => $value ) {
3160                         if ( wfRunHooks( 'ParserLimitReportFormat',
3161                                 array( $key, &$value, &$limitReport, true, true )
3162                         ) ) {
3163                                 $keyMsg = wfMessage( $key );
3164                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3165                                 if ( !$valueMsg->exists() ) {
3166                                         $valueMsg = new RawMessage( '$1' );
3167                                 }
3168                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3169                                         $limitReport .= Html::openElement( 'tr' ) .
3170                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3171                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3172                                                 Html::closeElement( 'tr' );
3173                                 }
3174                         }
3175                 }
3176
3177                 $limitReport .= Html::closeElement( 'tbody' ) .
3178                         Html::closeElement( 'table' ) .
3179                         Html::closeElement( 'div' );
3180
3181                 wfProfileOut( __METHOD__ );
3182
3183                 return $limitReport;
3184         }
3185
3186         protected function showStandardInputs( &$tabindex = 2 ) {
3187                 global $wgOut;
3188                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3189
3190                 if ( $this->section != 'new' ) {
3191                         $this->showSummaryInput( false, $this->summary );
3192                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3193                 }
3194
3195                 $checkboxes = $this->getCheckboxes( $tabindex,
3196                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3197                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3198
3199                 // Show copyright warning.
3200                 $wgOut->addWikiText( $this->getCopywarn() );
3201                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3202
3203                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3204                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3205
3206                 $cancel = $this->getCancelLink();
3207                 if ( $cancel !== '' ) {
3208                         $cancel .= Html::element( 'span',
3209                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3210                                 wfMessage( 'pipe-separator' )->text() );
3211                 }
3212
3213                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3214                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3215                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3216                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3217                         wfMessage( 'newwindow' )->parse();
3218
3219                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3220                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3221                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3222
3223                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3224
3225                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3226         }
3227
3228         /**
3229          * Show an edit conflict. textbox1 is already shown in showEditForm().
3230          * If you want to use another entry point to this function, be careful.
3231          */
3232         protected function showConflict() {
3233                 global $wgOut;
3234
3235                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3236                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3237
3238                         $content1 = $this->toEditContent( $this->textbox1 );
3239                         $content2 = $this->toEditContent( $this->textbox2 );
3240
3241                         $handler = ContentHandler::getForModelID( $this->contentModel );
3242                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3243                         $de->setContent( $content2, $content1 );
3244                         $de->showDiff(
3245                                 wfMessage( 'yourtext' )->parse(),
3246                                 wfMessage( 'storedversion' )->text()
3247                         );
3248
3249                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3250                         $this->showTextbox2();
3251                 }
3252         }
3253
3254         /**
3255          * @return string
3256          */
3257         public function getCancelLink() {
3258                 $cancelParams = array();
3259                 if ( !$this->isConflict && $this->oldid > 0 ) {
3260                         $cancelParams['oldid'] = $this->oldid;
3261                 }
3262
3263                 return Linker::linkKnown(
3264                         $this->getContextTitle(),
3265                         wfMessage( 'cancel' )->parse(),
3266                         array( 'id' => 'mw-editform-cancel' ),
3267                         $cancelParams
3268                 );
3269         }
3270
3271         /**
3272          * Returns the URL to use in the form's action attribute.
3273          * This is used by EditPage subclasses when simply customizing the action
3274          * variable in the constructor is not enough. This can be used when the
3275          * EditPage lives inside of a Special page rather than a custom page action.
3276          *
3277          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3278          * @return string
3279          */
3280         protected function getActionURL( Title $title ) {
3281                 return $title->getLocalURL( array( 'action' => $this->action ) );
3282         }
3283
3284         /**
3285          * Check if a page was deleted while the user was editing it, before submit.
3286          * Note that we rely on the logging table, which hasn't been always there,
3287          * but that doesn't matter, because this only applies to brand new
3288          * deletes.
3289          * @return bool
3290          */
3291         protected function wasDeletedSinceLastEdit() {
3292                 if ( $this->deletedSinceEdit !== null ) {
3293                         return $this->deletedSinceEdit;
3294                 }
3295
3296                 $this->deletedSinceEdit = false;
3297
3298                 if ( $this->mTitle->isDeletedQuick() ) {
3299                         $this->lastDelete = $this->getLastDelete();
3300                         if ( $this->lastDelete ) {
3301                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3302                                 if ( $deleteTime > $this->starttime ) {
3303                                         $this->deletedSinceEdit = true;
3304                                 }
3305                         }
3306                 }
3307
3308                 return $this->deletedSinceEdit;
3309         }
3310
3311         /**
3312          * @return bool|stdClass
3313          */
3314         protected function getLastDelete() {
3315                 $dbr = wfGetDB( DB_SLAVE );
3316                 $data = $dbr->selectRow(
3317                         array( 'logging', 'user' ),
3318                         array(
3319                                 'log_type',
3320                                 'log_action',
3321                                 'log_timestamp',
3322                                 'log_user',
3323                                 'log_namespace',
3324                                 'log_title',
3325                                 'log_comment',
3326                                 'log_params',
3327                                 'log_deleted',
3328                                 'user_name'
3329                         ), array(
3330                                 'log_namespace' => $this->mTitle->getNamespace(),
3331                                 'log_title' => $this->mTitle->getDBkey(),
3332                                 'log_type' => 'delete',
3333                                 'log_action' => 'delete',
3334                                 'user_id=log_user'
3335                         ),
3336                         __METHOD__,
3337                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3338                 );
3339                 // Quick paranoid permission checks...
3340                 if ( is_object( $data ) ) {
3341                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3342                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3343                         }
3344
3345                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3346                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3347                         }
3348                 }
3349
3350                 return $data;
3351         }
3352
3353         /**
3354          * Get the rendered text for previewing.
3355          * @throws MWException
3356          * @return string
3357          */
3358         function getPreviewText() {
3359                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3360                 global $wgAllowUserCss, $wgAllowUserJs;
3361
3362                 wfProfileIn( __METHOD__ );
3363
3364                 if ( $wgRawHtml && !$this->mTokenOk ) {
3365                         // Could be an offsite preview attempt. This is very unsafe if
3366                         // HTML is enabled, as it could be an attack.
3367                         $parsedNote = '';
3368                         if ( $this->textbox1 !== '' ) {
3369                                 // Do not put big scary notice, if previewing the empty
3370                                 // string, which happens when you initially edit
3371                                 // a category page, due to automatic preview-on-open.
3372                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3373                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3374                         }
3375                         wfProfileOut( __METHOD__ );
3376                         return $parsedNote;
3377                 }
3378
3379                 $note = '';
3380
3381                 try {
3382                         $content = $this->toEditContent( $this->textbox1 );
3383
3384                         $previewHTML = '';
3385                         if ( !wfRunHooks(
3386                                 'AlternateEditPreview',
3387                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3388                         ) {
3389                                 wfProfileOut( __METHOD__ );
3390                                 return $previewHTML;
3391                         }
3392
3393                         # provide a anchor link to the editform
3394                         $continueEditing = '<span class="mw-continue-editing">' .
3395                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3396                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3397                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3398                                 if ( $this->mTokenOkExceptSuffix ) {
3399                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3400                                 } else {
3401                                         $note = wfMessage( 'session_fail_preview' )->plain();
3402                                 }
3403                         } elseif ( $this->incompleteForm ) {
3404                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3405                         } else {
3406                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3407                         }
3408
3409                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3410                         $parserOptions->setEditSection( false );
3411                         $parserOptions->setIsPreview( true );
3412                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3413
3414                         # don't parse non-wikitext pages, show message about preview
3415                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3416                                 if ( $this->mTitle->isCssJsSubpage() ) {
3417                                         $level = 'user';
3418                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3419                                         $level = 'site';
3420                                 } else {
3421                                         $level = false;
3422                                 }
3423
3424                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3425                                         $format = 'css';
3426                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3427                                                 $format = false;
3428                                         }
3429                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3430                                         $format = 'js';
3431                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3432                                                 $format = false;
3433                                         }
3434                                 } else {
3435                                         $format = false;
3436                                 }
3437
3438                                 # Used messages to make sure grep find them:
3439                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3440                                 if ( $level && $format ) {
3441                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3442                                                 wfMessage( "{$level}{$format}preview" )->text() .
3443                                                 ' ' . $continueEditing . "</div>";
3444                                 }
3445                         }
3446
3447                         # If we're adding a comment, we need to show the
3448                         # summary as the headline
3449                         if ( $this->section === "new" && $this->summary !== "" ) {
3450                                 $content = $content->addSectionHeader( $this->summary );
3451                         }
3452
3453                         $hook_args = array( $this, &$content );
3454                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3455                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3456
3457                         $parserOptions->enableLimitReport();
3458
3459                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3460                         # But it's now deprecated, so never mind
3461
3462                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3463                         $parserOutput = $content->getParserOutput(
3464                                 $this->getArticle()->getTitle(),
3465                                 null,
3466                                 $parserOptions
3467                         );
3468
3469                         $previewHTML = $parserOutput->getText();
3470                         $this->mParserOutput = $parserOutput;
3471                         $wgOut->addParserOutputMetadata( $parserOutput );
3472
3473                         if ( count( $parserOutput->getWarnings() ) ) {
3474                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3475                         }
3476                 } catch ( MWContentSerializationException $ex ) {
3477                         $m = wfMessage(
3478                                 'content-failed-to-parse',
3479                                 $this->contentModel,
3480                                 $this->contentFormat,
3481                                 $ex->getMessage()
3482                         );
3483                         $note .= "\n\n" . $m->parse();
3484                         $previewHTML = '';
3485                 }
3486
3487                 if ( $this->isConflict ) {
3488                         $conflict = '<h2 id="mw-previewconflict">'
3489                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3490                 } else {
3491                         $conflict = '<hr />';
3492                 }
3493
3494                 $previewhead = "<div class='previewnote'>\n" .
3495                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3496                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3497
3498                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3499                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3500                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3501                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3502
3503                 wfProfileOut( __METHOD__ );
3504                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3505         }
3506
3507         /**
3508          * @return array
3509          */
3510         function getTemplates() {
3511                 if ( $this->preview || $this->section != '' ) {
3512                         $templates = array();
3513                         if ( !isset( $this->mParserOutput ) ) {
3514                                 return $templates;
3515                         }
3516                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3517                                 foreach ( array_keys( $template ) as $dbk ) {
3518                                         $templates[] = Title::makeTitle( $ns, $dbk );
3519                                 }
3520                         }
3521                         return $templates;
3522                 } else {
3523                         return $this->mTitle->getTemplateLinksFrom();
3524                 }
3525         }
3526
3527         /**
3528          * Shows a bulletin board style toolbar for common editing functions.
3529          * It can be disabled in the user preferences.
3530          *
3531          * @return string
3532          */
3533         static function getEditToolbar() {
3534                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3535                 global $wgEnableUploads, $wgForeignFileRepos;
3536
3537                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3538
3539                 /**
3540                  * $toolarray is an array of arrays each of which includes the
3541                  * filename of the button image (without path), the opening
3542                  * tag, the closing tag, optionally a sample text that is
3543                  * inserted between the two when no selection is highlighted
3544                  * and.  The tip text is shown when the user moves the mouse
3545                  * over the button.
3546                  *
3547                  * Also here: accesskeys (key), which are not used yet until
3548                  * someone can figure out a way to make them work in
3549                  * IE. However, we should make sure these keys are not defined
3550                  * on the edit page.
3551                  */
3552                 $toolarray = array(
3553                         array(
3554                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3555                                 'id'     => 'mw-editbutton-bold',
3556                                 'open'   => '\'\'\'',
3557                                 'close'  => '\'\'\'',
3558                                 'sample' => wfMessage( 'bold_sample' )->text(),
3559                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3560                                 'key'    => 'B'
3561                         ),
3562                         array(
3563                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3564                                 'id'     => 'mw-editbutton-italic',
3565                                 'open'   => '\'\'',
3566                                 'close'  => '\'\'',
3567                                 'sample' => wfMessage( 'italic_sample' )->text(),
3568                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3569                                 'key'    => 'I'
3570                         ),
3571                         array(
3572                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3573                                 'id'     => 'mw-editbutton-link',
3574                                 'open'   => '[[',
3575                                 'close'  => ']]',
3576                                 'sample' => wfMessage( 'link_sample' )->text(),
3577                                 'tip'    => wfMessage( 'link_tip' )->text(),
3578                                 'key'    => 'L'
3579                         ),
3580                         array(
3581                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3582                                 'id'     => 'mw-editbutton-extlink',
3583                                 'open'   => '[',
3584                                 'close'  => ']',
3585                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3586                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3587                                 'key'    => 'X'
3588                         ),
3589                         array(
3590                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3591                                 'id'     => 'mw-editbutton-headline',
3592                                 'open'   => "\n== ",
3593                                 'close'  => " ==\n",
3594                                 'sample' => wfMessage( 'headline_sample' )->text(),
3595                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3596                                 'key'    => 'H'
3597                         ),
3598                         $imagesAvailable ? array(
3599                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3600                                 'id'     => 'mw-editbutton-image',
3601                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3602                                 'close'  => ']]',
3603                                 'sample' => wfMessage( 'image_sample' )->text(),
3604                                 'tip'    => wfMessage( 'image_tip' )->text(),
3605                                 'key'    => 'D',
3606                         ) : false,
3607                         $imagesAvailable ? array(
3608                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3609                                 'id'     => 'mw-editbutton-media',
3610                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3611                                 'close'  => ']]',
3612                                 'sample' => wfMessage( 'media_sample' )->text(),
3613                                 'tip'    => wfMessage( 'media_tip' )->text(),
3614                                 'key'    => 'M'
3615                         ) : false,
3616                         array(
3617                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3618                                 'id'     => 'mw-editbutton-nowiki',
3619                                 'open'   => "<nowiki>",
3620                                 'close'  => "</nowiki>",
3621                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3622                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3623                                 'key'    => 'N'
3624                         ),
3625                         array(
3626                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3627                                 'id'     => 'mw-editbutton-signature',
3628                                 'open'   => '--~~~~',
3629                                 'close'  => '',
3630                                 'sample' => '',
3631                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3632                                 'key'    => 'Y'
3633                         ),
3634                         array(
3635                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3636                                 'id'     => 'mw-editbutton-hr',
3637                                 'open'   => "\n----\n",
3638                                 'close'  => '',
3639                                 'sample' => '',
3640                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3641                                 'key'    => 'R'
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                                 $wgStylePath . '/common/images/' . $tool['image'],
3653                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3654                                 // Older browsers show a "speedtip" type message only for ALT.
3655                                 // Ideally these should be different, realistically they
3656                                 // probably don't need to be.
3657                                 $tool['tip'],
3658                                 $tool['open'],
3659                                 $tool['close'],
3660                                 $tool['sample'],
3661                                 $tool['id'],
3662                         );
3663
3664                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3665                 }
3666
3667                 // This used to be called on DOMReady from mediawiki.action.edit, which
3668                 // ended up causing race conditions with the setup code above.
3669                 $script .= "\n" .
3670                         "// Create button bar\n" .
3671                         "$(function() { mw.toolbar.init(); } );\n";
3672
3673                 $script .= '});';
3674                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3675
3676                 $toolbar = '<div id="toolbar"></div>';
3677
3678                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3679
3680                 return $toolbar;
3681         }
3682
3683         /**
3684          * Returns an array of html code of the following checkboxes:
3685          * minor and watch
3686          *
3687          * @param int $tabindex Current tabindex
3688          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3689          *                 status of the checkbox
3690          *
3691          * @return array
3692          */
3693         public function getCheckboxes( &$tabindex, $checked ) {
3694                 global $wgUser;
3695
3696                 $checkboxes = array();
3697
3698                 // don't show the minor edit checkbox if it's a new page or section
3699                 if ( !$this->isNew ) {
3700                         $checkboxes['minor'] = '';
3701                         $minorLabel = wfMessage( 'minoredit' )->parse();
3702                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3703                                 $attribs = array(
3704                                         'tabindex' => ++$tabindex,
3705                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3706                                         'id' => 'wpMinoredit',
3707                                 );
3708                                 $checkboxes['minor'] =
3709                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3710                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3711                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3712                                         ">{$minorLabel}</label>";
3713                         }
3714                 }
3715
3716                 $watchLabel = wfMessage( 'watchthis' )->parse();
3717                 $checkboxes['watch'] = '';
3718                 if ( $wgUser->isLoggedIn() ) {
3719                         $attribs = array(
3720                                 'tabindex' => ++$tabindex,
3721                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3722                                 'id' => 'wpWatchthis',
3723                         );
3724                         $checkboxes['watch'] =
3725                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3726                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3727                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3728                                 ">{$watchLabel}</label>";
3729                 }
3730                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3731                 return $checkboxes;
3732         }
3733
3734         /**
3735          * Returns an array of html code of the following buttons:
3736          * save, diff, preview and live
3737          *
3738          * @param int $tabindex Current tabindex
3739          *
3740          * @return array
3741          */
3742         public function getEditButtons( &$tabindex ) {
3743                 $buttons = array();
3744
3745                 $attribs = array(
3746                         'id' => 'wpSave',
3747                         'name' => 'wpSave',
3748                         'type' => 'submit',
3749                         'tabindex' => ++$tabindex,
3750                         'value' => wfMessage( 'savearticle' )->text(),
3751                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3752                 $buttons['save'] = Xml::element( 'input', $attribs, '' );
3753
3754                 ++$tabindex; // use the same for preview and live preview
3755                 $attribs = array(
3756                         'id' => 'wpPreview',
3757                         'name' => 'wpPreview',
3758                         'type' => 'submit',
3759                         'tabindex' => $tabindex,
3760                         'value' => wfMessage( 'showpreview' )->text(),
3761                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3762                 $buttons['preview'] = Xml::element( 'input', $attribs, '' );
3763                 $buttons['live'] = '';
3764
3765                 $attribs = array(
3766                         'id' => 'wpDiff',
3767                         'name' => 'wpDiff',
3768                         'type' => 'submit',
3769                         'tabindex' => ++$tabindex,
3770                         'value' => wfMessage( 'showdiff' )->text(),
3771                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3772                 $buttons['diff'] = Xml::element( 'input', $attribs, '' );
3773
3774                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3775                 return $buttons;
3776         }
3777
3778         /**
3779          * Output preview text only. This can be sucked into the edit page
3780          * via JavaScript, and saves the server time rendering the skin as
3781          * well as theoretically being more robust on the client (doesn't
3782          * disturb the edit box's undo history, won't eat your text on
3783          * failure, etc).
3784          *
3785          * @todo This doesn't include category or interlanguage links.
3786          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3787          *       or something...</s>" that might also require more skin
3788          *       initialization, so check whether that's a problem.
3789          */
3790         function livePreview() {
3791                 global $wgOut;
3792                 $wgOut->disable();
3793                 header( 'Content-type: text/xml; charset=utf-8' );
3794                 header( 'Cache-control: no-cache' );
3795
3796                 $previewText = $this->getPreviewText();
3797                 #$categories = $skin->getCategoryLinks();
3798
3799                 $s =
3800                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3801                         Xml::tags( 'livepreview', null,
3802                                 Xml::element( 'preview', null, $previewText )
3803                                 #.      Xml::element( 'category', null, $categories )
3804                         );
3805                 echo $s;
3806         }
3807
3808         /**
3809          * Creates a basic error page which informs the user that
3810          * they have attempted to edit a nonexistent section.
3811          */
3812         function noSuchSectionPage() {
3813                 global $wgOut;
3814
3815                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3816
3817                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3818                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3819                 $wgOut->addHTML( $res );
3820
3821                 $wgOut->returnToMain( false, $this->mTitle );
3822         }
3823
3824         /**
3825          * Show "your edit contains spam" page with your diff and text
3826          *
3827          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3828          */
3829         public function spamPageWithContent( $match = false ) {
3830                 global $wgOut, $wgLang;
3831                 $this->textbox2 = $this->textbox1;
3832
3833                 if ( is_array( $match ) ) {
3834                         $match = $wgLang->listToText( $match );
3835                 }
3836                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3837
3838                 $wgOut->addHTML( '<div id="spamprotected">' );
3839                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3840                 if ( $match ) {
3841                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3842                 }
3843                 $wgOut->addHTML( '</div>' );
3844
3845                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3846                 $this->showDiff();
3847
3848                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3849                 $this->showTextbox2();
3850
3851                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3852         }
3853
3854         /**
3855          * Check if the browser is on a blacklist of user-agents known to
3856          * mangle UTF-8 data on form submission. Returns true if Unicode
3857          * should make it through, false if it's known to be a problem.
3858          * @return bool
3859          */
3860         private function checkUnicodeCompliantBrowser() {
3861                 global $wgBrowserBlackList, $wgRequest;
3862
3863                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3864                 if ( $currentbrowser === false ) {
3865                         // No User-Agent header sent? Trust it by default...
3866                         return true;
3867                 }
3868
3869                 foreach ( $wgBrowserBlackList as $browser ) {
3870                         if ( preg_match( $browser, $currentbrowser ) ) {
3871                                 return false;
3872                         }
3873                 }
3874                 return true;
3875         }
3876
3877         /**
3878          * Filter an input field through a Unicode de-armoring process if it
3879          * came from an old browser with known broken Unicode editing issues.
3880          *
3881          * @param WebRequest $request
3882          * @param string $field
3883          * @return string
3884          */
3885         protected function safeUnicodeInput( $request, $field ) {
3886                 $text = rtrim( $request->getText( $field ) );
3887                 return $request->getBool( 'safemode' )
3888                         ? $this->unmakeSafe( $text )
3889                         : $text;
3890         }
3891
3892         /**
3893          * Filter an output field through a Unicode armoring process if it is
3894          * going to an old browser with known broken Unicode editing issues.
3895          *
3896          * @param string $text
3897          * @return string
3898          */
3899         protected function safeUnicodeOutput( $text ) {
3900                 global $wgContLang;
3901                 $codedText = $wgContLang->recodeForEdit( $text );
3902                 return $this->checkUnicodeCompliantBrowser()
3903                         ? $codedText
3904                         : $this->makeSafe( $codedText );
3905         }
3906
3907         /**
3908          * A number of web browsers are known to corrupt non-ASCII characters
3909          * in a UTF-8 text editing environment. To protect against this,
3910          * detected browsers will be served an armored version of the text,
3911          * with non-ASCII chars converted to numeric HTML character references.
3912          *
3913          * Preexisting such character references will have a 0 added to them
3914          * to ensure that round-trips do not alter the original data.
3915          *
3916          * @param string $invalue
3917          * @return string
3918          */
3919         private function makeSafe( $invalue ) {
3920                 // Armor existing references for reversibility.
3921                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3922
3923                 $bytesleft = 0;
3924                 $result = "";
3925                 $working = 0;
3926                 $valueLength = strlen( $invalue );
3927                 for ( $i = 0; $i < $valueLength; $i++ ) {
3928                         $bytevalue = ord( $invalue[$i] );
3929                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3930                                 $result .= chr( $bytevalue );
3931                                 $bytesleft = 0;
3932                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3933                                 $working = $working << 6;
3934                                 $working += ( $bytevalue & 0x3F );
3935                                 $bytesleft--;
3936                                 if ( $bytesleft <= 0 ) {
3937                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3938                                 }
3939                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3940                                 $working = $bytevalue & 0x1F;
3941                                 $bytesleft = 1;
3942                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3943                                 $working = $bytevalue & 0x0F;
3944                                 $bytesleft = 2;
3945                         } else { // 1111 0xxx
3946                                 $working = $bytevalue & 0x07;
3947                                 $bytesleft = 3;
3948                         }
3949                 }
3950                 return $result;
3951         }
3952
3953         /**
3954          * Reverse the previously applied transliteration of non-ASCII characters
3955          * back to UTF-8. Used to protect data from corruption by broken web browsers
3956          * as listed in $wgBrowserBlackList.
3957          *
3958          * @param string $invalue
3959          * @return string
3960          */
3961         private function unmakeSafe( $invalue ) {
3962                 $result = "";
3963                 $valueLength = strlen( $invalue );
3964                 for ( $i = 0; $i < $valueLength; $i++ ) {
3965                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3966                                 $i += 3;
3967                                 $hexstring = "";
3968                                 do {
3969                                         $hexstring .= $invalue[$i];
3970                                         $i++;
3971                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3972
3973                                 // Do some sanity checks. These aren't needed for reversibility,
3974                                 // but should help keep the breakage down if the editor
3975                                 // breaks one of the entities whilst editing.
3976                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3977                                         $codepoint = hexdec( $hexstring );
3978                                         $result .= codepointToUtf8( $codepoint );
3979                                 } else {
3980                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3981                                 }
3982                         } else {
3983                                 $result .= substr( $invalue, $i, 1 );
3984                         }
3985                 }
3986                 // reverse the transform that we made for reversibility reasons.
3987                 return strtr( $result, array( "&#x0" => "&#x" ) );
3988         }
3989 }