includes/EditPage.php

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