includes/EditPage.php

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