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