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         /**
  41          * Status: Article successfully updated
  42          */
  43         const AS_SUCCESS_UPDATE = 200;
  44
  45         /**
  46          * Status: Article successfully created
  47          */
  48         const AS_SUCCESS_NEW_ARTICLE = 201;
  49
  50         /**
  51          * Status: Article update aborted by a hook function
  52          */
  53         const AS_HOOK_ERROR = 210;
  54
  55         /**
  56          * Status: A hook function returned an error
  57          */
  58         const AS_HOOK_ERROR_EXPECTED = 212;
  59
  60         /**
  61          * Status: User is blocked from editing this page
  62          */
  63         const AS_BLOCKED_PAGE_FOR_USER = 215;
  64
  65         /**
  66          * Status: Content too big (> $wgMaxArticleSize)
  67          */
  68         const AS_CONTENT_TOO_BIG = 216;
  69
  70         /**
  71          * Status: User cannot edit? (not used)
  72          */
  73         const AS_USER_CANNOT_EDIT = 217;
  74
  75         /**
  76          * Status: this anonymous user is not allowed to edit this page
  77          */
  78         const AS_READ_ONLY_PAGE_ANON = 218;
  79
  80         /**
  81          * Status: this logged in user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_LOGGED = 219;
  84
  85         /**
  86          * Status: wiki is in readonly mode (wfReadOnly() == true)
  87          */
  88         const AS_READ_ONLY_PAGE = 220;
  89
  90         /**
  91          * Status: rate limiter for action 'edit' was tripped
  92          */
  93         const AS_RATE_LIMITED = 221;
  94
  95         /**
  96          * Status: article was deleted while editing and param wpRecreate == false or form
  97          * was not posted
  98          */
  99         const AS_ARTICLE_WAS_DELETED = 222;
 100
 101         /**
 102          * Status: user tried to create this page, but is not allowed to do that
 103          * ( Title->userCan('create') == false )
 104          */
 105         const AS_NO_CREATE_PERMISSION = 223;
 106
 107         /**
 108          * Status: user tried to create a blank page
 109          */
 110         const AS_BLANK_ARTICLE = 224;
 111
 112         /**
 113          * Status: (non-resolvable) edit conflict
 114          */
 115         const AS_CONFLICT_DETECTED = 225;
 116
 117         /**
 118          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 119          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 120          */
 121         const AS_SUMMARY_NEEDED = 226;
 122
 123         /**
 124          * Status: user tried to create a new section without content
 125          */
 126         const AS_TEXTBOX_EMPTY = 228;
 127
 128         /**
 129          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 130          */
 131         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 132
 133         /**
 134          * not used
 135          */
 136         const AS_OK = 230;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessful
 140          */
 141         const AS_END = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED = 234;
 157
 158         /**
 159          * Status: can't parse content
 160          */
 161         const AS_PARSE_ERROR = 240;
 162
 163         /**
 164          * HTML id and name for the beginning of the edit form.
 165          */
 166         const EDITFORM_ID = 'editform';
 167
 168         /**
 169          * Prefix of key for cookie used to pass post-edit state.
 170          * The revision id edited is added after this
 171          */
 172         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 173
 174         /**
 175          * Duration of PostEdit cookie, in seconds.
 176          * The cookie will be removed instantly if the JavaScript runs.
 177          *
 178          * Otherwise, though, we don't want the cookies to accumulate.
 179          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible limit of only 20 cookies per domain.
 180          * This still applies at least to some versions of IE without full updates:
 181          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 182          *
 183          * A value of 20 minutes should be enough to take into account slow loads and minor
 184          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 185          */
 186         const POST_EDIT_COOKIE_DURATION = 1200;
 187
 188         /**
 189          * @var Article
 190          */
 191         var $mArticle;
 192
 193         /**
 194          * @var Title
 195          */
 196         var $mTitle;
 197         private $mContextTitle = null;
 198         var $action = 'submit';
 199         var $isConflict = false;
 200         var $isCssJsSubpage = false;
 201         var $isCssSubpage = false;
 202         var $isJsSubpage = false;
 203         var $isWrongCaseCssJsPage = false;
 204         var $isNew = false; // new page or new section
 205         var $deletedSinceEdit;
 206         var $formtype;
 207         var $firsttime;
 208         var $lastDelete;
 209         var $mTokenOk = false;
 210         var $mTokenOkExceptSuffix = false;
 211         var $mTriedSave = false;
 212         var $incompleteForm = false;
 213         var $tooBig = false;
 214         var $kblength = false;
 215         var $missingComment = false;
 216         var $missingSummary = false;
 217         var $allowBlankSummary = false;
 218         var $autoSumm = '';
 219         var $hookError = '';
 220         #var $mPreviewTemplates;
 221
 222         /**
 223          * @var ParserOutput
 224          */
 225         var $mParserOutput;
 226
 227         /**
 228          * Has a summary been preset using GET parameter &summary= ?
 229          * @var Bool
 230          */
 231         var $hasPresetSummary = false;
 232
 233         var $mBaseRevision = false;
 234         var $mShowSummaryField = true;
 235
 236         # Form values
 237         var $save = false, $preview = false, $diff = false;
 238         var $minoredit = false, $watchthis = false, $recreate = false;
 239         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 240         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 241         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 242         var $contentModel = null, $contentFormat = null;
 243
 244         # Placeholders for text injection by hooks (must be HTML)
 245         # extensions should take care to _append_ to the present value
 246         public $editFormPageTop = ''; // Before even the preview
 247         public $editFormTextTop = '';
 248         public $editFormTextBeforeContent = '';
 249         public $editFormTextAfterWarn = '';
 250         public $editFormTextAfterTools = '';
 251         public $editFormTextBottom = '';
 252         public $editFormTextAfterContent = '';
 253         public $previewTextAfterContent = '';
 254         public $mPreloadContent = null;
 255
 256         /* $didSave should be set to true whenever an article was successfully altered. */
 257         public $didSave = false;
 258         public $undidRev = 0;
 259
 260         public $suppressIntro = false;
 261
 262         /**
 263          * Set to true to allow editing of non-text content types.
 264          *
 265          * @var bool
 266          */
 267         public $allowNonTextContent = false;
 268
 269         /**
 270          * @param $article Article
 271          */
 272         public function __construct( Article $article ) {
 273                 $this->mArticle = $article;
 274                 $this->mTitle = $article->getTitle();
 275
 276                 $this->contentModel = $this->mTitle->getContentModel();
 277
 278                 $handler = ContentHandler::getForModelID( $this->contentModel );
 279                 $this->contentFormat = $handler->getDefaultFormat();
 280         }
 281
 282         /**
 283          * @return Article
 284          */
 285         public function getArticle() {
 286                 return $this->mArticle;
 287         }
 288
 289         /**
 290          * @since 1.19
 291          * @return Title
 292          */
 293         public function getTitle() {
 294                 return $this->mTitle;
 295         }
 296
 297         /**
 298          * Set the context Title object
 299          *
 300          * @param $title Title object or null
 301          */
 302         public function setContextTitle( $title ) {
 303                 $this->mContextTitle = $title;
 304         }
 305
 306         /**
 307          * Get the context title object.
 308          * If not set, $wgTitle will be returned. This behavior might change in
 309          * the future to return $this->mTitle instead.
 310          *
 311          * @return Title object
 312          */
 313         public function getContextTitle() {
 314                 if ( is_null( $this->mContextTitle ) ) {
 315                         global $wgTitle;
 316                         return $wgTitle;
 317                 } else {
 318                         return $this->mContextTitle;
 319                 }
 320         }
 321
 322         function submit() {
 323                 $this->edit();
 324         }
 325
 326         /**
 327          * This is the function that gets called for "action=edit". It
 328          * sets up various member variables, then passes execution to
 329          * another function, usually showEditForm()
 330          *
 331          * The edit form is self-submitting, so that when things like
 332          * preview and edit conflicts occur, we get the same form back
 333          * with the extra stuff added.  Only when the final submission
 334          * is made and all is well do we actually save and redirect to
 335          * the newly-edited page.
 336          */
 337         function edit() {
 338                 global $wgOut, $wgRequest, $wgUser;
 339                 // Allow extensions to modify/prevent this form or submission
 340                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 341                         return;
 342                 }
 343
 344                 wfProfileIn( __METHOD__ );
 345                 wfDebug( __METHOD__ . ": enter\n" );
 346
 347                 // If they used redlink=1 and the page exists, redirect to the main article
 348                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 349                         $wgOut->redirect( $this->mTitle->getFullURL() );
 350                         wfProfileOut( __METHOD__ );
 351                         return;
 352                 }
 353
 354                 $this->importFormData( $wgRequest );
 355                 $this->firsttime = false;
 356
 357                 if ( $this->live ) {
 358                         $this->livePreview();
 359                         wfProfileOut( __METHOD__ );
 360                         return;
 361                 }
 362
 363                 if ( wfReadOnly() && $this->save ) {
 364                         // Force preview
 365                         $this->save = false;
 366                         $this->preview = true;
 367                 }
 368
 369                 if ( $this->save ) {
 370                         $this->formtype = 'save';
 371                 } elseif ( $this->preview ) {
 372                         $this->formtype = 'preview';
 373                 } elseif ( $this->diff ) {
 374                         $this->formtype = 'diff';
 375                 } else { # First time through
 376                         $this->firsttime = true;
 377                         if ( $this->previewOnOpen() ) {
 378                                 $this->formtype = 'preview';
 379                         } else {
 380                                 $this->formtype = 'initial';
 381                         }
 382                 }
 383
 384                 $permErrors = $this->getEditPermissionErrors();
 385                 if ( $permErrors ) {
 386                         wfDebug( __METHOD__ . ": User can't edit\n" );
 387                         // Auto-block user's IP if the account was "hard" blocked
 388                         $wgUser->spreadAnyEditBlock();
 389
 390                         $this->displayPermissionsError( $permErrors );
 391
 392                         wfProfileOut( __METHOD__ );
 393                         return;
 394                 }
 395
 396                 wfProfileIn( __METHOD__ . "-business-end" );
 397
 398                 $this->isConflict = false;
 399                 // css / js subpages of user pages get a special treatment
 400                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 401                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 402                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 403                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 404
 405                 # Show applicable editing introductions
 406                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 407                         $this->showIntro();
 408                 }
 409
 410                 # Attempt submission here.  This will check for edit conflicts,
 411                 # and redundantly check for locked database, blocked IPs, etc.
 412                 # that edit() already checked just in case someone tries to sneak
 413                 # in the back door with a hand-edited submission URL.
 414
 415                 if ( 'save' == $this->formtype ) {
 416                         if ( !$this->attemptSave() ) {
 417                                 wfProfileOut( __METHOD__ . "-business-end" );
 418                                 wfProfileOut( __METHOD__ );
 419                                 return;
 420                         }
 421                 }
 422
 423                 # First time through: get contents, set time for conflict
 424                 # checking, etc.
 425                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 426                         if ( $this->initialiseForm() === false ) {
 427                                 $this->noSuchSectionPage();
 428                                 wfProfileOut( __METHOD__ . "-business-end" );
 429                                 wfProfileOut( __METHOD__ );
 430                                 return;
 431                         }
 432
 433                         if ( !$this->mTitle->getArticleID() ) {
 434                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 435                         } else {
 436                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 437                         }
 438
 439                 }
 440
 441                 $this->showEditForm();
 442                 wfProfileOut( __METHOD__ . "-business-end" );
 443                 wfProfileOut( __METHOD__ );
 444         }
 445
 446         /**
 447          * @return array
 448          */
 449         protected function getEditPermissionErrors() {
 450                 global $wgUser;
 451                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 452                 # Can this title be created?
 453                 if ( !$this->mTitle->exists() ) {
 454                         $permErrors = array_merge( $permErrors,
 455                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 456                 }
 457                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 458                 $remove = array();
 459                 foreach ( $permErrors as $error ) {
 460                         if ( ( $this->preview || $this->diff ) &&
 461                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 462                         {
 463                                 $remove[] = $error;
 464                         }
 465                 }
 466                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 467                 return $permErrors;
 468         }
 469
 470         /**
 471          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 472          * but with the following differences:
 473          * - If redlink=1, the user will be redirected to the page
 474          * - If there is content to display or the error occurs while either saving,
 475          *   previewing or showing the difference, it will be a
 476          *   "View source for ..." page displaying the source code after the error message.
 477          *
 478          * @since 1.19
 479          * @param array $permErrors of permissions errors, as returned by
 480          *                    Title::getUserPermissionsErrors().
 481          * @throws PermissionsError
 482          */
 483         protected function displayPermissionsError( array $permErrors ) {
 484                 global $wgRequest, $wgOut;
 485
 486                 if ( $wgRequest->getBool( 'redlink' ) ) {
 487                         // The edit page was reached via a red link.
 488                         // Redirect to the article page and let them click the edit tab if
 489                         // they really want a permission error.
 490                         $wgOut->redirect( $this->mTitle->getFullURL() );
 491                         return;
 492                 }
 493
 494                 $content = $this->getContentObject();
 495
 496                 # Use the normal message if there's nothing to display
 497                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 498                         $action = $this->mTitle->exists() ? 'edit' :
 499                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 500                         throw new PermissionsError( $action, $permErrors );
 501                 }
 502
 503                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 504                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 505                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 506                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 507                 $wgOut->addHTML( "<hr />\n" );
 508
 509                 # If the user made changes, preserve them when showing the markup
 510                 # (This happens when a user is blocked during edit, for instance)
 511                 if ( !$this->firsttime ) {
 512                         $text = $this->textbox1;
 513                         $wgOut->addWikiMsg( 'viewyourtext' );
 514                 } else {
 515                         $text = $this->toEditText( $content );
 516                         $wgOut->addWikiMsg( 'viewsourcetext' );
 517                 }
 518
 519                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 520
 521                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 522                         Linker::formatTemplates( $this->getTemplates() ) ) );
 523
 524                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 525
 526                 if ( $this->mTitle->exists() ) {
 527                         $wgOut->returnToMain( null, $this->mTitle );
 528                 }
 529         }
 530
 531         /**
 532          * Show a read-only error
 533          * Parameters are the same as OutputPage:readOnlyPage()
 534          * Redirect to the article page if redlink=1
 535          * @deprecated in 1.19; use displayPermissionsError() instead
 536          */
 537         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 538                 wfDeprecated( __METHOD__, '1.19' );
 539
 540                 global $wgRequest, $wgOut;
 541                 if ( $wgRequest->getBool( 'redlink' ) ) {
 542                         // The edit page was reached via a red link.
 543                         // Redirect to the article page and let them click the edit tab if
 544                         // they really want a permission error.
 545                         $wgOut->redirect( $this->mTitle->getFullURL() );
 546                 } else {
 547                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 548                 }
 549         }
 550
 551         /**
 552          * Should we show a preview when the edit form is first shown?
 553          *
 554          * @return bool
 555          */
 556         protected function previewOnOpen() {
 557                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 558                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 559                         // Explicit override from request
 560                         return true;
 561                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 562                         // Explicit override from request
 563                         return false;
 564                 } elseif ( $this->section == 'new' ) {
 565                         // Nothing *to* preview for new sections
 566                         return false;
 567                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 568                         // Standard preference behavior
 569                         return true;
 570                 } elseif ( !$this->mTitle->exists() &&
 571                         isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 572                         $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 573                 {
 574                         // Categories are special
 575                         return true;
 576                 } else {
 577                         return false;
 578                 }
 579         }
 580
 581         /**
 582          * Checks whether the user entered a skin name in uppercase,
 583          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 584          *
 585          * @return bool
 586          */
 587         protected function isWrongCaseCssJsPage() {
 588                 if ( $this->mTitle->isCssJsSubpage() ) {
 589                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 590                         $skins = array_merge(
 591                                 array_keys( Skin::getSkinNames() ),
 592                                 array( 'common' )
 593                         );
 594                         return !in_array( $name, $skins )
 595                                 && in_array( strtolower( $name ), $skins );
 596                 } else {
 597                         return false;
 598                 }
 599         }
 600
 601         /**
 602          * Returns whether section editing is supported for the current page.
 603          * Subclasses may override this to replace the default behavior, which is
 604          * to check ContentHandler::supportsSections.
 605          *
 606          * @return bool true if this edit page supports sections, false otherwise.
 607          */
 608         protected function isSectionEditSupported() {
 609                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 610                 return $contentHandler->supportsSections();
 611         }
 612
 613         /**
 614          * This function collects the form data and uses it to populate various member variables.
 615          * @param $request WebRequest
 616          */
 617         function importFormData( &$request ) {
 618                 global $wgContLang, $wgUser;
 619
 620                 wfProfileIn( __METHOD__ );
 621
 622                 # Section edit can come from either the form or a link
 623                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 624
 625                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 626                         wfProfileOut( __METHOD__ );
 627                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 628                 }
 629
 630                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 631
 632                 if ( $request->wasPosted() ) {
 633                         # These fields need to be checked for encoding.
 634                         # Also remove trailing whitespace, but don't remove _initial_
 635                         # whitespace from the text boxes. This may be significant formatting.
 636                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 637                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 638                                 // Skip this if wpTextbox2 has input, it indicates that we came
 639                                 // from a conflict page with raw page text, not a custom form
 640                                 // modified by subclasses
 641                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 642                                 $textbox1 = $this->importContentFormData( $request );
 643                                 if ( $textbox1 !== null ) {
 644                                         $this->textbox1 = $textbox1;
 645                                 }
 646
 647                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 648                         }
 649
 650                         # Truncate for whole multibyte characters
 651                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 652
 653                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 654                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 655                         # section titles.
 656                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 657
 658                         # Treat sectiontitle the same way as summary.
 659                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 660                         # currently doing double duty as both edit summary and section title. Right now this
 661                         # is just to allow API edits to work around this limitation, but this should be
 662                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 663                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 664                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 665
 666                         $this->edittime = $request->getVal( 'wpEdittime' );
 667                         $this->starttime = $request->getVal( 'wpStarttime' );
 668
 669                         $undidRev = $request->getInt( 'wpUndidRevision' );
 670                         if ( $undidRev ) {
 671                                 $this->undidRev = $undidRev;
 672                         }
 673
 674                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 675
 676                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 677                                 // wpTextbox1 field is missing, possibly due to being "too big"
 678                                 // according to some filter rules such as Suhosin's setting for
 679                                 // suhosin.request.max_value_length (d'oh)
 680                                 $this->incompleteForm = true;
 681                         } else {
 682                                 // edittime should be one of our last fields; if it's missing,
 683                                 // the submission probably broke somewhere in the middle.
 684                                 $this->incompleteForm = is_null( $this->edittime );
 685                         }
 686                         if ( $this->incompleteForm ) {
 687                                 # If the form is incomplete, force to preview.
 688                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 689                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 690                                 $this->preview = true;
 691                         } else {
 692                                 /* Fallback for live preview */
 693                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 694                                 $this->diff = $request->getCheck( 'wpDiff' );
 695
 696                                 // Remember whether a save was requested, so we can indicate
 697                                 // if we forced preview due to session failure.
 698                                 $this->mTriedSave = !$this->preview;
 699
 700                                 if ( $this->tokenOk( $request ) ) {
 701                                         # Some browsers will not report any submit button
 702                                         # if the user hits enter in the comment box.
 703                                         # The unmarked state will be assumed to be a save,
 704                                         # if the form seems otherwise complete.
 705                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 706                                 } elseif ( $this->diff ) {
 707                                         # Failed token check, but only requested "Show Changes".
 708                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 709                                 } else {
 710                                         # Page might be a hack attempt posted from
 711                                         # an external site. Preview instead of saving.
 712                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 713                                         $this->preview = true;
 714                                 }
 715                         }
 716                         $this->save = !$this->preview && !$this->diff;
 717                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 718                                 $this->edittime = null;
 719                         }
 720
 721                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 722                                 $this->starttime = null;
 723                         }
 724
 725                         $this->recreate = $request->getCheck( 'wpRecreate' );
 726
 727                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 728                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 729
 730                         # Don't force edit summaries when a user is editing their own user or talk page
 731                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 732                                 $this->mTitle->getText() == $wgUser->getName() )
 733                         {
 734                                 $this->allowBlankSummary = true;
 735                         } else {
 736                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 737                         }
 738
 739                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 740                 } else {
 741                         # Not a posted form? Start with nothing.
 742                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 743                         $this->textbox1 = '';
 744                         $this->summary = '';
 745                         $this->sectiontitle = '';
 746                         $this->edittime = '';
 747                         $this->starttime = wfTimestampNow();
 748                         $this->edit = false;
 749                         $this->preview = false;
 750                         $this->save = false;
 751                         $this->diff = false;
 752                         $this->minoredit = false;
 753                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overridden by request parameters
 754                         $this->recreate = false;
 755
 756                         // When creating a new section, we can preload a section title by passing it as the
 757                         // preloadtitle parameter in the URL (Bug 13100)
 758                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 759                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 760                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 761                                 $this->summary = $request->getVal( 'preloadtitle' );
 762                         }
 763                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 764                                 $this->summary = $request->getText( 'summary' );
 765                                 if ( $this->summary !== '' ) {
 766                                         $this->hasPresetSummary = true;
 767                                 }
 768                         }
 769
 770                         if ( $request->getVal( 'minor' ) ) {
 771                                 $this->minoredit = true;
 772                         }
 773                 }
 774
 775                 $this->oldid = $request->getInt( 'oldid' );
 776
 777                 $this->bot = $request->getBool( 'bot', true );
 778                 $this->nosummary = $request->getBool( 'nosummary' );
 779
 780                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 781                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 782                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 783
 784                 #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
 785                 #TODO: check if the desired content model supports the given content format!
 786
 787                 $this->live = $request->getCheck( 'live' );
 788                 $this->editintro = $request->getText( 'editintro',
 789                         // Custom edit intro for new sections
 790                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 791
 792                 // Allow extensions to modify form data
 793                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 794
 795                 wfProfileOut( __METHOD__ );
 796         }
 797
 798         /**
 799          * Subpage overridable method for extracting the page content data from the
 800          * posted form to be placed in $this->textbox1, if using customized input
 801          * this method should be overridden and return the page text that will be used
 802          * for saving, preview parsing and so on...
 803          *
 804          * @param $request WebRequest
 805          */
 806         protected function importContentFormData( &$request ) {
 807                 return; // Don't do anything, EditPage already extracted wpTextbox1
 808         }
 809
 810         /**
 811          * Initialise form fields in the object
 812          * Called on the first invocation, e.g. when a user clicks an edit link
 813          * @return bool -- if the requested section is valid
 814          */
 815         function initialiseForm() {
 816                 global $wgUser;
 817                 $this->edittime = $this->mArticle->getTimestamp();
 818
 819                 $content = $this->getContentObject( false ); #TODO: track content object?!
 820                 if ( $content === false ) {
 821                         return false;
 822                 }
 823                 $this->textbox1 = $this->toEditText( $content );
 824
 825                 // activate checkboxes if user wants them to be always active
 826                 # Sort out the "watch" checkbox
 827                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 828                         # Watch all edits
 829                         $this->watchthis = true;
 830                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 831                         # Watch creations
 832                         $this->watchthis = true;
 833                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 834                         # Already watched
 835                         $this->watchthis = true;
 836                 }
 837                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 838                         $this->minoredit = true;
 839                 }
 840                 if ( $this->textbox1 === false ) {
 841                         return false;
 842                 }
 843                 wfProxyCheck();
 844                 return true;
 845         }
 846
 847         /**
 848          * Fetch initial editing page content.
 849          *
 850          * @param $def_text string|bool
 851          * @return mixed string on success, $def_text for invalid sections
 852          * @private
 853          * @deprecated since 1.21, get WikiPage::getContent() instead.
 854          */
 855         function getContent( $def_text = false ) {
 856                 ContentHandler::deprecated( __METHOD__, '1.21' );
 857
 858                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 859                         $def_content = $this->toEditContent( $def_text );
 860                 } else {
 861                         $def_content = false;
 862                 }
 863
 864                 $content = $this->getContentObject( $def_content );
 865
 866                 // Note: EditPage should only be used with text based content anyway.
 867                 return $this->toEditText( $content );
 868         }
 869
 870         /**
 871          * @param Content|null $def_content The default value to return
 872          *
 873          * @return mixed Content on success, $def_content for invalid sections
 874          *
 875          * @since 1.21
 876          */
 877         protected function getContentObject( $def_content = null ) {
 878                 global $wgOut, $wgRequest;
 879
 880                 wfProfileIn( __METHOD__ );
 881
 882                 $content = false;
 883
 884                 // For message page not locally set, use the i18n message.
 885                 // For other non-existent articles, use preload text if any.
 886                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 887                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 888                                 # If this is a system message, get the default text.
 889                                 $msg = $this->mTitle->getDefaultMessageText();
 890
 891                                 $content = $this->toEditContent( $msg );
 892                         }
 893                         if ( $content === false ) {
 894                                 # If requested, preload some text.
 895                                 $preload = $wgRequest->getVal( 'preload',
 896                                         // Custom preload text for new sections
 897                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 898
 899                                 $content = $this->getPreloadedContent( $preload );
 900                         }
 901                 // For existing pages, get text based on "undo" or section parameters.
 902                 } else {
 903                         if ( $this->section != '' ) {
 904                                 // Get section edit text (returns $def_text for invalid sections)
 905                                 $orig = $this->getOriginalContent();
 906                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 907
 908                                 if ( !$content ) {
 909                                         $content = $def_content;
 910                                 }
 911                         } else {
 912                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 913                                 $undo = $wgRequest->getInt( 'undo' );
 914
 915                                 if ( $undo > 0 && $undoafter > 0 ) {
 916                                         if ( $undo < $undoafter ) {
 917                                                 # If they got undoafter and undo round the wrong way, switch them
 918                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 919                                         }
 920
 921                                         $undorev = Revision::newFromId( $undo );
 922                                         $oldrev = Revision::newFromId( $undoafter );
 923
 924                                         # Sanity check, make sure it's the right page,
 925                                         # the revisions exist and they were not deleted.
 926                                         # Otherwise, $content will be left as-is.
 927                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 928                                                 $undorev->getPage() == $oldrev->getPage() &&
 929                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 930                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 931                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 932
 933                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 934
 935                                                 if ( $content === false ) {
 936                                                         # Warn the user that something went wrong
 937                                                         $undoMsg = 'failure';
 938                                                 } else {
 939                                                         # Inform the user of our success and set an automatic edit summary
 940                                                         $undoMsg = 'success';
 941
 942                                                         # If we just undid one rev, use an autosummary
 943                                                         $firstrev = $oldrev->getNext();
 944                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 945                                                                 $userText = $undorev->getUserText();
 946                                                                 if ( $userText === '' ) {
 947                                                                         $undoSummary = wfMessage(
 948                                                                                 'undo-summary-username-hidden',
 949                                                                                 $undo
 950                                                                         )->inContentLanguage()->text();
 951                                                                 } else {
 952                                                                         $undoSummary = wfMessage(
 953                                                                                 'undo-summary',
 954                                                                                 $undo,
 955                                                                                 $userText
 956                                                                         )->inContentLanguage()->text();
 957                                                                 }
 958                                                                 if ( $this->summary === '' ) {
 959                                                                         $this->summary = $undoSummary;
 960                                                                 } else {
 961                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 962                                                                                 ->inContentLanguage()->text() . $this->summary;
 963                                                                 }
 964                                                                 $this->undidRev = $undo;
 965                                                         }
 966                                                         $this->formtype = 'diff';
 967                                                 }
 968                                         } else {
 969                                                 // Failed basic sanity checks.
 970                                                 // Older revisions may have been removed since the link
 971                                                 // was created, or we may simply have got bogus input.
 972                                                 $undoMsg = 'norev';
 973                                         }
 974
 975                                         // Messages: undo-success, undo-failure, undo-norev
 976                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 977                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 978                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 979                                 }
 980
 981                                 if ( $content === false ) {
 982                                         $content = $this->getOriginalContent();
 983                                 }
 984                         }
 985                 }
 986
 987                 wfProfileOut( __METHOD__ );
 988                 return $content;
 989         }
 990
 991         /**
 992          * Get the content of the wanted revision, without section extraction.
 993          *
 994          * The result of this function can be used to compare user's input with
 995          * section replaced in its context (using WikiPage::replaceSection())
 996          * to the original text of the edit.
 997          *
 998          * This differs from Article::getContent() that when a missing revision is
 999          * encountered the result will be null and not the
1000          * 'missing-revision' message.
1001          *
1002          * @since 1.19
1003          * @return Content|null
1004          */
1005         private function getOriginalContent() {
1006                 if ( $this->section == 'new' ) {
1007                         return $this->getCurrentContent();
1008                 }
1009                 $revision = $this->mArticle->getRevisionFetched();
1010                 if ( $revision === null ) {
1011                         if ( !$this->contentModel ) {
1012                                 $this->contentModel = $this->getTitle()->getContentModel();
1013                         }
1014                         $handler = ContentHandler::getForModelID( $this->contentModel );
1015
1016                         return $handler->makeEmptyContent();
1017                 }
1018                 $content = $revision->getContent();
1019                 return $content;
1020         }
1021
1022         /**
1023          * Get the current content of the page. This is basically similar to
1024          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1025          * content object is returned instead of null.
1026          *
1027          * @since 1.21
1028          * @return Content
1029          */
1030         protected function getCurrentContent() {
1031                 $rev = $this->mArticle->getRevision();
1032                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1033
1034                 if ( $content === false || $content === null ) {
1035                         if ( !$this->contentModel ) {
1036                                 $this->contentModel = $this->getTitle()->getContentModel();
1037                         }
1038                         $handler = ContentHandler::getForModelID( $this->contentModel );
1039
1040                         return $handler->makeEmptyContent();
1041                 } else {
1042                         # nasty side-effect, but needed for consistency
1043                         $this->contentModel = $rev->getContentModel();
1044                         $this->contentFormat = $rev->getContentFormat();
1045
1046                         return $content;
1047                 }
1048         }
1049
1050         /**
1051          * Use this method before edit() to preload some text into the edit box
1052          *
1053          * @param $text string
1054          * @deprecated since 1.21, use setPreloadedContent() instead.
1055          */
1056         public function setPreloadedText( $text ) {
1057                 ContentHandler::deprecated( __METHOD__, "1.21" );
1058
1059                 $content = $this->toEditContent( $text );
1060
1061                 $this->setPreloadedContent( $content );
1062         }
1063
1064         /**
1065          * Use this method before edit() to preload some content into the edit box
1066          *
1067          * @param $content Content
1068          *
1069          * @since 1.21
1070          */
1071         public function setPreloadedContent( Content $content ) {
1072                 $this->mPreloadContent = $content;
1073         }
1074
1075         /**
1076          * Get the contents to be preloaded into the box, either set by
1077          * an earlier setPreloadText() or by loading the given page.
1078          *
1079          * @param string $preload representing the title to preload from.
1080          *
1081          * @return String
1082          *
1083          * @deprecated since 1.21, use getPreloadedContent() instead
1084          */
1085         protected function getPreloadedText( $preload ) {
1086                 ContentHandler::deprecated( __METHOD__, "1.21" );
1087
1088                 $content = $this->getPreloadedContent( $preload );
1089                 $text = $this->toEditText( $content );
1090
1091                 return $text;
1092         }
1093
1094         /**
1095          * Get the contents to be preloaded into the box, either set by
1096          * an earlier setPreloadText() or by loading the given page.
1097          *
1098          * @param string $preload representing the title to preload from.
1099          *
1100          * @return Content
1101          *
1102          * @since 1.21
1103          */
1104         protected function getPreloadedContent( $preload ) {
1105                 global $wgUser;
1106
1107                 if ( !empty( $this->mPreloadContent ) ) {
1108                         return $this->mPreloadContent;
1109                 }
1110
1111                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1112
1113                 if ( $preload === '' ) {
1114                         return $handler->makeEmptyContent();
1115                 }
1116
1117                 $title = Title::newFromText( $preload );
1118                 # Check for existence to avoid getting MediaWiki:Noarticletext
1119                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1120                         //TODO: somehow show a warning to the user!
1121                         return $handler->makeEmptyContent();
1122                 }
1123
1124                 $page = WikiPage::factory( $title );
1125                 if ( $page->isRedirect() ) {
1126                         $title = $page->getRedirectTarget();
1127                         # Same as before
1128                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1129                                 //TODO: somehow show a warning to the user!
1130                                 return $handler->makeEmptyContent();
1131                         }
1132                         $page = WikiPage::factory( $title );
1133                 }
1134
1135                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1136                 $content = $page->getContent( Revision::RAW );
1137
1138                 if ( !$content ) {
1139                         //TODO: somehow show a warning to the user!
1140                         return $handler->makeEmptyContent();
1141                 }
1142
1143                 if ( $content->getModel() !== $handler->getModelID() ) {
1144                         $converted = $content->convert( $handler->getModelID() );
1145
1146                         if ( !$converted ) {
1147                                 //TODO: somehow show a warning to the user!
1148                                 wfDebug( "Attempt to preload incompatible content: "
1149                                                 . "can't convert " . $content->getModel()
1150                                                 . " to " . $handler->getModelID() );
1151
1152                                 return $handler->makeEmptyContent();
1153                         }
1154
1155                         $content = $converted;
1156                 }
1157
1158                 return $content->preloadTransform( $title, $parserOptions );
1159         }
1160
1161         /**
1162          * Make sure the form isn't faking a user's credentials.
1163          *
1164          * @param $request WebRequest
1165          * @return bool
1166          * @private
1167          */
1168         function tokenOk( &$request ) {
1169                 global $wgUser;
1170                 $token = $request->getVal( 'wpEditToken' );
1171                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1172                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1173                 return $this->mTokenOk;
1174         }
1175
1176         /**
1177          * Sets post-edit cookie indicating the user just saved a particular revision.
1178          *
1179          * This uses a temporary cookie for each revision ID so separate saves will never
1180          * interfere with each other.
1181          *
1182          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1183          * the redirect.  It must be clearable by JavaScript code, so it must not be
1184          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1185          * variable.
1186          *
1187          * We use a path of '/' since wgCookiePath is not exposed to JS
1188          *
1189          * If the variable were set on the server, it would be cached, which is unwanted
1190          * since the post-edit state should only apply to the load right after the save.
1191          */
1192         protected function setPostEditCookie() {
1193                 $revisionId = $this->mArticle->getLatest();
1194                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1195
1196                 $response = RequestContext::getMain()->getRequest()->response();
1197                 $response->setcookie( $postEditKey, '1', time() + self::POST_EDIT_COOKIE_DURATION, array(
1198                         'path' => '/',
1199                         'httpOnly' => false,
1200                 ) );
1201         }
1202
1203         /**
1204          * Attempt submission
1205          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1206          * @return bool false if output is done, true if the rest of the form should be displayed
1207          */
1208         function attemptSave() {
1209                 global $wgUser, $wgOut;
1210
1211                 $resultDetails = false;
1212                 # Allow bots to exempt some edits from bot flagging
1213                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1214                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1215                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1216                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1217                         $this->didSave = true;
1218                         if ( !$resultDetails['nullEdit'] ) {
1219                                 $this->setPostEditCookie();
1220                         }
1221                 }
1222
1223                 switch ( $status->value ) {
1224                         case self::AS_HOOK_ERROR_EXPECTED:
1225                         case self::AS_CONTENT_TOO_BIG:
1226                         case self::AS_ARTICLE_WAS_DELETED:
1227                         case self::AS_CONFLICT_DETECTED:
1228                         case self::AS_SUMMARY_NEEDED:
1229                         case self::AS_TEXTBOX_EMPTY:
1230                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1231                         case self::AS_END:
1232                                 return true;
1233
1234                         case self::AS_HOOK_ERROR:
1235                                 return false;
1236
1237                         case self::AS_PARSE_ERROR:
1238                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1239                                 return true;
1240
1241                         case self::AS_SUCCESS_NEW_ARTICLE:
1242                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1243                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1244                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1245                                 return false;
1246
1247                         case self::AS_SUCCESS_UPDATE:
1248                                 $extraQuery = '';
1249                                 $sectionanchor = $resultDetails['sectionanchor'];
1250
1251                                 // Give extensions a chance to modify URL query on update
1252                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1253
1254                                 if ( $resultDetails['redirect'] ) {
1255                                         if ( $extraQuery == '' ) {
1256                                                 $extraQuery = 'redirect=no';
1257                                         } else {
1258                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1259                                         }
1260                                 }
1261                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1262                                 return false;
1263
1264                         case self::AS_BLANK_ARTICLE:
1265                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1266                                 return false;
1267
1268                         case self::AS_SPAM_ERROR:
1269                                 $this->spamPageWithContent( $resultDetails['spam'] );
1270                                 return false;
1271
1272                         case self::AS_BLOCKED_PAGE_FOR_USER:
1273                                 throw new UserBlockedError( $wgUser->getBlock() );
1274
1275                         case self::AS_IMAGE_REDIRECT_ANON:
1276                         case self::AS_IMAGE_REDIRECT_LOGGED:
1277                                 throw new PermissionsError( 'upload' );
1278
1279                         case self::AS_READ_ONLY_PAGE_ANON:
1280                         case self::AS_READ_ONLY_PAGE_LOGGED:
1281                                 throw new PermissionsError( 'edit' );
1282
1283                         case self::AS_READ_ONLY_PAGE:
1284                                 throw new ReadOnlyError;
1285
1286                         case self::AS_RATE_LIMITED:
1287                                 throw new ThrottledError();
1288
1289                         case self::AS_NO_CREATE_PERMISSION:
1290                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1291                                 throw new PermissionsError( $permission );
1292
1293                         default:
1294                                 // We don't recognize $status->value. The only way that can happen
1295                                 // is if an extension hook aborted from inside ArticleSave.
1296                                 // Render the status object into $this->hookError
1297                                 // FIXME this sucks, we should just use the Status object throughout
1298                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1299                                         '</div>';
1300                                 return true;
1301                 }
1302         }
1303
1304         /**
1305          * Run hooks that can filter edits just before they get saved.
1306          *
1307          * @param Content $content the Content to filter.
1308          * @param Status  $status for reporting the outcome to the caller
1309          * @param User    $user the user performing the edit
1310          *
1311          * @return bool
1312          */
1313         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1314                 // Run old style post-section-merge edit filter
1315                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1316                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1317
1318                         # Error messages etc. could be handled within the hook...
1319                         $status->fatal( 'hookaborted' );
1320                         $status->value = self::AS_HOOK_ERROR;
1321                         return false;
1322                 } elseif ( $this->hookError != '' ) {
1323                         # ...or the hook could be expecting us to produce an error
1324                         $status->fatal( 'hookaborted' );
1325                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1326                         return false;
1327                 }
1328
1329                 // Run new style post-section-merge edit filter
1330                 if ( !wfRunHooks( 'EditFilterMergedContent',
1331                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1332                                 $user, $this->minoredit ) ) ) {
1333
1334                         # Error messages etc. could be handled within the hook...
1335                         // XXX: $status->value may already be something informative...
1336                         $this->hookError = $status->getWikiText();
1337                         $status->fatal( 'hookaborted' );
1338                         $status->value = self::AS_HOOK_ERROR;
1339                         return false;
1340                 } elseif ( !$status->isOK() ) {
1341                         # ...or the hook could be expecting us to produce an error
1342                         // FIXME this sucks, we should just use the Status object throughout
1343                         $this->hookError = $status->getWikiText();
1344                         $status->fatal( 'hookaborted' );
1345                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1346                         return false;
1347                 }
1348
1349                 return true;
1350         }
1351
1352         /**
1353          * Attempt submission (no UI)
1354          *
1355          * @param array $result array to add statuses to, currently with the possible keys:
1356          *  spam - string - Spam string from content if any spam is detected by matchSpamRegex
1357          *  sectionanchor - string - Section anchor for a section save
1358          *  nullEdit - boolean - Set if doEditContent is OK.  True if null edit, false otherwise.
1359          *  redirect - boolean -  Set if doEditContent is OK.  True if resulting revision is a redirect
1360          * @param bool $bot True if edit is being made under the bot right.
1361          *
1362          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1363          *
1364          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1365          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1366          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1367          */
1368         function internalAttemptSave( &$result, $bot = false ) {
1369                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1370
1371                 $status = Status::newGood();
1372
1373                 wfProfileIn( __METHOD__ );
1374                 wfProfileIn( __METHOD__ . '-checks' );
1375
1376                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1377                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1378                         $status->fatal( 'hookaborted' );
1379                         $status->value = self::AS_HOOK_ERROR;
1380                         wfProfileOut( __METHOD__ . '-checks' );
1381                         wfProfileOut( __METHOD__ );
1382                         return $status;
1383                 }
1384
1385                 try {
1386                         # Construct Content object
1387                         $textbox_content = $this->toEditContent( $this->textbox1 );
1388                 } catch ( MWContentSerializationException $ex ) {
1389                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1390                         $status->value = self::AS_PARSE_ERROR;
1391                         wfProfileOut( __METHOD__ . '-checks' );
1392                         wfProfileOut( __METHOD__ );
1393                         return $status;
1394                 }
1395
1396                 # Check image redirect
1397                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1398                         $textbox_content->isRedirect() &&
1399                         !$wgUser->isAllowed( 'upload' ) ) {
1400                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1401                                 $status->setResult( false, $code );
1402
1403                                 wfProfileOut( __METHOD__ . '-checks' );
1404                                 wfProfileOut( __METHOD__ );
1405
1406                                 return $status;
1407                 }
1408
1409                 # Check for spam
1410                 $match = self::matchSummarySpamRegex( $this->summary );
1411                 if ( $match === false && $this->section == 'new' ) {
1412                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1413                         # regular summaries, it is added to the actual wikitext.
1414                         if ( $this->sectiontitle !== '' ) {
1415                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1416                                 $match = self::matchSpamRegex( $this->sectiontitle );
1417                         } else {
1418                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1419                                 # is used with the 'summary' parameter.
1420                                 $match = self::matchSpamRegex( $this->summary );
1421                         }
1422                 }
1423                 if ( $match === false ) {
1424                         $match = self::matchSpamRegex( $this->textbox1 );
1425                 }
1426                 if ( $match !== false ) {
1427                         $result['spam'] = $match;
1428                         $ip = $wgRequest->getIP();
1429                         $pdbk = $this->mTitle->getPrefixedDBkey();
1430                         $match = str_replace( "\n", '', $match );
1431                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1432                         $status->fatal( 'spamprotectionmatch', $match );
1433                         $status->value = self::AS_SPAM_ERROR;
1434                         wfProfileOut( __METHOD__ . '-checks' );
1435                         wfProfileOut( __METHOD__ );
1436                         return $status;
1437                 }
1438                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1439                         # Error messages etc. could be handled within the hook...
1440                         $status->fatal( 'hookaborted' );
1441                         $status->value = self::AS_HOOK_ERROR;
1442                         wfProfileOut( __METHOD__ . '-checks' );
1443                         wfProfileOut( __METHOD__ );
1444                         return $status;
1445                 } elseif ( $this->hookError != '' ) {
1446                         # ...or the hook could be expecting us to produce an error
1447                         $status->fatal( 'hookaborted' );
1448                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1449                         wfProfileOut( __METHOD__ . '-checks' );
1450                         wfProfileOut( __METHOD__ );
1451                         return $status;
1452                 }
1453
1454                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1455                         // Auto-block user's IP if the account was "hard" blocked
1456                         $wgUser->spreadAnyEditBlock();
1457                         # Check block state against master, thus 'false'.
1458                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1459                         wfProfileOut( __METHOD__ . '-checks' );
1460                         wfProfileOut( __METHOD__ );
1461                         return $status;
1462                 }
1463
1464                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1465                 if ( $this->kblength > $wgMaxArticleSize ) {
1466                         // Error will be displayed by showEditForm()
1467                         $this->tooBig = true;
1468                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1469                         wfProfileOut( __METHOD__ . '-checks' );
1470                         wfProfileOut( __METHOD__ );
1471                         return $status;
1472                 }
1473
1474                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1475                         if ( $wgUser->isAnon() ) {
1476                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1477                                 wfProfileOut( __METHOD__ . '-checks' );
1478                                 wfProfileOut( __METHOD__ );
1479                                 return $status;
1480                         } else {
1481                                 $status->fatal( 'readonlytext' );
1482                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1483                                 wfProfileOut( __METHOD__ . '-checks' );
1484                                 wfProfileOut( __METHOD__ );
1485                                 return $status;
1486                         }
1487                 }
1488
1489                 if ( wfReadOnly() ) {
1490                         $status->fatal( 'readonlytext' );
1491                         $status->value = self::AS_READ_ONLY_PAGE;
1492                         wfProfileOut( __METHOD__ . '-checks' );
1493                         wfProfileOut( __METHOD__ );
1494                         return $status;
1495                 }
1496                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1497                         $status->fatal( 'actionthrottledtext' );
1498                         $status->value = self::AS_RATE_LIMITED;
1499                         wfProfileOut( __METHOD__ . '-checks' );
1500                         wfProfileOut( __METHOD__ );
1501                         return $status;
1502                 }
1503
1504                 # If the article has been deleted while editing, don't save it without
1505                 # confirmation
1506                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1507                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1508                         wfProfileOut( __METHOD__ . '-checks' );
1509                         wfProfileOut( __METHOD__ );
1510                         return $status;
1511                 }
1512
1513                 wfProfileOut( __METHOD__ . '-checks' );
1514
1515                 # Load the page data from the master. If anything changes in the meantime,
1516                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1517                 $this->mArticle->loadPageData( 'fromdbmaster' );
1518                 $new = !$this->mArticle->exists();
1519
1520                 if ( $new ) {
1521                         // Late check for create permission, just in case *PARANOIA*
1522                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1523                                 $status->fatal( 'nocreatetext' );
1524                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1525                                 wfDebug( __METHOD__ . ": no create permission\n" );
1526                                 wfProfileOut( __METHOD__ );
1527                                 return $status;
1528                         }
1529
1530                         // Don't save a new page if it's blank or if it's a MediaWiki:
1531                         // message with content equivalent to default (allow empty pages
1532                         // in this case to disable messages, see bug 50124)
1533                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1534                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1535                                 $defaultText = $defaultMessageText;
1536                         } else {
1537                                 $defaultText = '';
1538                         }
1539
1540                         if ( $this->textbox1 === $defaultText ) {
1541                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1542                                 wfProfileOut( __METHOD__ );
1543                                 return $status;
1544                         }
1545
1546                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1547                                 wfProfileOut( __METHOD__ );
1548                                 return $status;
1549                         }
1550
1551                         $content = $textbox_content;
1552
1553                         $result['sectionanchor'] = '';
1554                         if ( $this->section == 'new' ) {
1555                                 if ( $this->sectiontitle !== '' ) {
1556                                         // Insert the section title above the content.
1557                                         $content = $content->addSectionHeader( $this->sectiontitle );
1558
1559                                         // Jump to the new section
1560                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1561
1562                                         // If no edit summary was specified, create one automatically from the section
1563                                         // title and have it link to the new section. Otherwise, respect the summary as
1564                                         // passed.
1565                                         if ( $this->summary === '' ) {
1566                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1567                                                 $this->summary = wfMessage( 'newsectionsummary' )
1568                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1569                                         }
1570                                 } elseif ( $this->summary !== '' ) {
1571                                         // Insert the section title above the content.
1572                                         $content = $content->addSectionHeader( $this->summary );
1573
1574                                         // Jump to the new section
1575                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1576
1577                                         // Create a link to the new section from the edit summary.
1578                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1579                                         $this->summary = wfMessage( 'newsectionsummary' )
1580                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1581                                 }
1582                         }
1583
1584                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1585
1586                 } else { # not $new
1587
1588                         # Article exists. Check for edit conflict.
1589
1590                         $this->mArticle->clear(); # Force reload of dates, etc.
1591                         $timestamp = $this->mArticle->getTimestamp();
1592
1593                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1594
1595                         if ( $timestamp != $this->edittime ) {
1596                                 $this->isConflict = true;
1597                                 if ( $this->section == 'new' ) {
1598                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1599                                                 $this->mArticle->getComment() == $this->summary ) {
1600                                                 // Probably a duplicate submission of a new comment.
1601                                                 // This can happen when squid resends a request after
1602                                                 // a timeout but the first one actually went through.
1603                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1604                                         } else {
1605                                                 // New comment; suppress conflict.
1606                                                 $this->isConflict = false;
1607                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1608                                         }
1609                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1610                                                         $wgUser->getId(), $this->edittime ) ) {
1611                                         # Suppress edit conflict with self, except for section edits where merging is required.
1612                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1613                                         $this->isConflict = false;
1614                                 }
1615                         }
1616
1617                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1618                         if ( $this->sectiontitle !== '' ) {
1619                                 $sectionTitle = $this->sectiontitle;
1620                         } else {
1621                                 $sectionTitle = $this->summary;
1622                         }
1623
1624                         $content = null;
1625
1626                         if ( $this->isConflict ) {
1627                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1628                                                 . " (article time '{$timestamp}')\n" );
1629
1630                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1631                         } else {
1632                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1633                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1634                         }
1635
1636                         if ( is_null( $content ) ) {
1637                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1638                                 $this->isConflict = true;
1639                                 $content = $textbox_content; // do not try to merge here!
1640                         } elseif ( $this->isConflict ) {
1641                                 # Attempt merge
1642                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1643                                         // Successful merge! Maybe we should tell the user the good news?
1644                                         $this->isConflict = false;
1645                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1646                                 } else {
1647                                         $this->section = '';
1648                                         $this->textbox1 = ContentHandler::getContentText( $content );
1649                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1650                                 }
1651                         }
1652
1653                         if ( $this->isConflict ) {
1654                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1655                                 wfProfileOut( __METHOD__ );
1656                                 return $status;
1657                         }
1658
1659                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1660                                 wfProfileOut( __METHOD__ );
1661                                 return $status;
1662                         }
1663
1664                         if ( $this->section == 'new' ) {
1665                                 // Handle the user preference to force summaries here
1666                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1667                                         $this->missingSummary = true;
1668                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1669                                         $status->value = self::AS_SUMMARY_NEEDED;
1670                                         wfProfileOut( __METHOD__ );
1671                                         return $status;
1672                                 }
1673
1674                                 // Do not allow the user to post an empty comment
1675                                 if ( $this->textbox1 == '' ) {
1676                                         $this->missingComment = true;
1677                                         $status->fatal( 'missingcommenttext' );
1678                                         $status->value = self::AS_TEXTBOX_EMPTY;
1679                                         wfProfileOut( __METHOD__ );
1680                                         return $status;
1681                                 }
1682                         } elseif ( !$this->allowBlankSummary
1683                                 && !$content->equals( $this->getOriginalContent() )
1684                                 && !$content->isRedirect()
1685                                 && md5( $this->summary ) == $this->autoSumm
1686                         ) {
1687                                 $this->missingSummary = true;
1688                                 $status->fatal( 'missingsummary' );
1689                                 $status->value = self::AS_SUMMARY_NEEDED;
1690                                 wfProfileOut( __METHOD__ );
1691                                 return $status;
1692                         }
1693
1694                         # All's well
1695                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1696                         $sectionanchor = '';
1697                         if ( $this->section == 'new' ) {
1698                                 if ( $this->sectiontitle !== '' ) {
1699                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1700                                         // If no edit summary was specified, create one automatically from the section
1701                                         // title and have it link to the new section. Otherwise, respect the summary as
1702                                         // passed.
1703                                         if ( $this->summary === '' ) {
1704                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1705                                                 $this->summary = wfMessage( 'newsectionsummary' )
1706                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1707                                         }
1708                                 } elseif ( $this->summary !== '' ) {
1709                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1710                                         # This is a new section, so create a link to the new section
1711                                         # in the revision summary.
1712                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1713                                         $this->summary = wfMessage( 'newsectionsummary' )
1714                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1715                                 }
1716                         } elseif ( $this->section != '' ) {
1717                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1718                                 # XXX: might be better to integrate this into Article::replaceSection
1719                                 # for duplicate heading checking and maybe parsing
1720                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1721                                 # we can't deal with anchors, includes, html etc in the header for now,
1722                                 # headline would need to be parsed to improve this
1723                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1724                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1725                                 }
1726                         }
1727                         $result['sectionanchor'] = $sectionanchor;
1728                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1729
1730                         // Save errors may fall down to the edit form, but we've now
1731                         // merged the section into full text. Clear the section field
1732                         // so that later submission of conflict forms won't try to
1733                         // replace that into a duplicated mess.
1734                         $this->textbox1 = $this->toEditText( $content );
1735                         $this->section = '';
1736
1737                         $status->value = self::AS_SUCCESS_UPDATE;
1738                 }
1739
1740                 // Check for length errors again now that the section is merged in
1741                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1742                 if ( $this->kblength > $wgMaxArticleSize ) {
1743                         $this->tooBig = true;
1744                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1745                         wfProfileOut( __METHOD__ );
1746                         return $status;
1747                 }
1748
1749                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1750                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1751                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1752                         ( $bot ? EDIT_FORCE_BOT : 0 );
1753
1754                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1755                                                                                                                         false, null, $this->contentFormat );
1756
1757                 if ( !$doEditStatus->isOK() ) {
1758                         // Failure from doEdit()
1759                         // Show the edit conflict page for certain recognized errors from doEdit(),
1760                         // but don't show it for errors from extension hooks
1761                         $errors = $doEditStatus->getErrorsArray();
1762                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1763                                 'edit-already-exists' ) ) )
1764                         {
1765                                 $this->isConflict = true;
1766                                 // Destroys data doEdit() put in $status->value but who cares
1767                                 $doEditStatus->value = self::AS_END;
1768                         }
1769                         wfProfileOut( __METHOD__ );
1770                         return $doEditStatus;
1771                 }
1772
1773                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1774                 if ( $result['nullEdit'] ) {
1775                         // We don't know if it was a null edit until now, so increment here
1776                         $wgUser->pingLimiter( 'linkpurge' );
1777                 }
1778                 $result['redirect'] = $content->isRedirect();
1779                 $this->updateWatchlist();
1780                 wfProfileOut( __METHOD__ );
1781                 return $status;
1782         }
1783
1784         /**
1785          * Register the change of watch status
1786          */
1787         protected function updateWatchlist() {
1788                 global $wgUser;
1789
1790                 if ( $wgUser->isLoggedIn()
1791                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1792                 ) {
1793                         $fname = __METHOD__;
1794                         $title = $this->mTitle;
1795                         $watch = $this->watchthis;
1796
1797                         // Do this in its own transaction to reduce contention...
1798                         $dbw = wfGetDB( DB_MASTER );
1799                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1800                                 $dbw->begin( $fname );
1801                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1802                                 $dbw->commit( $fname );
1803                         } );
1804                 }
1805         }
1806
1807         /**
1808          * Attempts to merge text content with base and current revisions
1809          *
1810          * @param $editText string
1811          *
1812          * @return bool
1813          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1814          */
1815         function mergeChangesInto( &$editText ) {
1816                 ContentHandler::deprecated( __METHOD__, "1.21" );
1817
1818                 $editContent = $this->toEditContent( $editText );
1819
1820                 $ok = $this->mergeChangesIntoContent( $editContent );
1821
1822                 if ( $ok ) {
1823                         $editText = $this->toEditText( $editContent );
1824                         return true;
1825                 }
1826                 return false;
1827         }
1828
1829         /**
1830          * Attempts to do 3-way merge of edit content with a base revision
1831          * and current content, in case of edit conflict, in whichever way appropriate
1832          * for the content type.
1833          *
1834          * @since 1.21
1835          *
1836          * @param $editContent
1837          *
1838          * @return bool
1839          */
1840         private function mergeChangesIntoContent( &$editContent ) {
1841                 wfProfileIn( __METHOD__ );
1842
1843                 $db = wfGetDB( DB_MASTER );
1844
1845                 // This is the revision the editor started from
1846                 $baseRevision = $this->getBaseRevision();
1847                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1848
1849                 if ( is_null( $baseContent ) ) {
1850                         wfProfileOut( __METHOD__ );
1851                         return false;
1852                 }
1853
1854                 // The current state, we want to merge updates into it
1855                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1856                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1857
1858                 if ( is_null( $currentContent ) ) {
1859                         wfProfileOut( __METHOD__ );
1860                         return false;
1861                 }
1862
1863                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1864
1865                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1866
1867                 if ( $result ) {
1868                         $editContent = $result;
1869                         wfProfileOut( __METHOD__ );
1870                         return true;
1871                 }
1872
1873                 wfProfileOut( __METHOD__ );
1874                 return false;
1875         }
1876
1877         /**
1878          * @return Revision
1879          */
1880         function getBaseRevision() {
1881                 if ( !$this->mBaseRevision ) {
1882                         $db = wfGetDB( DB_MASTER );
1883                         $baseRevision = Revision::loadFromTimestamp(
1884                                 $db, $this->mTitle, $this->edittime );
1885                         return $this->mBaseRevision = $baseRevision;
1886                 } else {
1887                         return $this->mBaseRevision;
1888                 }
1889         }
1890
1891         /**
1892          * Check given input text against $wgSpamRegex, and return the text of the first match.
1893          *
1894          * @param $text string
1895          *
1896          * @return string|bool matching string or false
1897          */
1898         public static function matchSpamRegex( $text ) {
1899                 global $wgSpamRegex;
1900                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1901                 $regexes = (array)$wgSpamRegex;
1902                 return self::matchSpamRegexInternal( $text, $regexes );
1903         }
1904
1905         /**
1906          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
1907          *
1908          * @param $text string
1909          *
1910          * @return string|bool matching string or false
1911          */
1912         public static function matchSummarySpamRegex( $text ) {
1913                 global $wgSummarySpamRegex;
1914                 $regexes = (array)$wgSummarySpamRegex;
1915                 return self::matchSpamRegexInternal( $text, $regexes );
1916         }
1917
1918         /**
1919          * @param $text string
1920          * @param $regexes array
1921          * @return bool|string
1922          */
1923         protected static function matchSpamRegexInternal( $text, $regexes ) {
1924                 foreach ( $regexes as $regex ) {
1925                         $matches = array();
1926                         if ( preg_match( $regex, $text, $matches ) ) {
1927                                 return $matches[0];
1928                         }
1929                 }
1930                 return false;
1931         }
1932
1933         function setHeaders() {
1934                 global $wgOut, $wgUser;
1935
1936                 $wgOut->addModules( 'mediawiki.action.edit' );
1937                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
1938
1939                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1940                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1941                 }
1942
1943                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
1944                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
1945                 }
1946
1947                 // Bug #19334: textarea jumps when editing articles in IE8
1948                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1949
1950                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1951
1952                 # Enabled article-related sidebar, toplinks, etc.
1953                 $wgOut->setArticleRelated( true );
1954
1955                 $contextTitle = $this->getContextTitle();
1956                 if ( $this->isConflict ) {
1957                         $msg = 'editconflict';
1958                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1959                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1960                 } else {
1961                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1962                                 'editing' : 'creating';
1963                 }
1964                 # Use the title defined by DISPLAYTITLE magic word when present
1965                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1966                 if ( $displayTitle === false ) {
1967                         $displayTitle = $contextTitle->getPrefixedText();
1968                 }
1969                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1970         }
1971
1972         /**
1973          * Show all applicable editing introductions
1974          */
1975         protected function showIntro() {
1976                 global $wgOut, $wgUser;
1977                 if ( $this->suppressIntro ) {
1978                         return;
1979                 }
1980
1981                 $namespace = $this->mTitle->getNamespace();
1982
1983                 if ( $namespace == NS_MEDIAWIKI ) {
1984                         # Show a warning if editing an interface message
1985                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1986                 } elseif ( $namespace == NS_FILE ) {
1987                         # Show a hint to shared repo
1988                         $file = wfFindFile( $this->mTitle );
1989                         if ( $file && !$file->isLocal() ) {
1990                                 $descUrl = $file->getDescriptionUrl();
1991                                 # there must be a description url to show a hint to shared repo
1992                                 if ( $descUrl ) {
1993                                         if ( !$this->mTitle->exists() ) {
1994                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
1995                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1996                                                 ) );
1997                                         } else {
1998                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1999                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2000                                                 ) );
2001                                         }
2002                                 }
2003                         }
2004                 }
2005
2006                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2007                 # Show log extract when the user is currently blocked
2008                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2009                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2010                         $username = $parts[0];
2011                         $user = User::newFromName( $username, false /* allow IP users*/ );
2012                         $ip = User::isIP( $username );
2013                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2014                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2015                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2016                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
2017                                 LogEventsList::showLogExtract(
2018                                         $wgOut,
2019                                         'block',
2020                                         $user->getUserPage(),
2021                                         '',
2022                                         array(
2023                                                 'lim' => 1,
2024                                                 'showIfEmpty' => false,
2025                                                 'msgKey' => array(
2026                                                         'blocked-notice-logextract',
2027                                                         $user->getName() # Support GENDER in notice
2028                                                 )
2029                                         )
2030                                 );
2031                         }
2032                 }
2033                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2034                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2035                         if ( $wgUser->isLoggedIn() ) {
2036                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
2037                         } else {
2038                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
2039                         }
2040                 }
2041                 # Give a notice if the user is editing a deleted/moved page...
2042                 if ( !$this->mTitle->exists() ) {
2043                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2044                                 '',
2045                                 array(
2046                                         'lim' => 10,
2047                                         'conds' => array( "log_action != 'revision'" ),
2048                                         'showIfEmpty' => false,
2049                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2050                                 )
2051                         );
2052                 }
2053         }
2054
2055         /**
2056          * Attempt to show a custom editing introduction, if supplied
2057          *
2058          * @return bool
2059          */
2060         protected function showCustomIntro() {
2061                 if ( $this->editintro ) {
2062                         $title = Title::newFromText( $this->editintro );
2063                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2064                                 global $wgOut;
2065                                 // Added using template syntax, to take <noinclude>'s into account.
2066                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2067                                 return true;
2068                         }
2069                 }
2070                 return false;
2071         }
2072
2073         /**
2074          * Gets an editable textual representation of $content.
2075          * The textual representation can be turned by into a Content object by the
2076          * toEditContent() method.
2077          *
2078          * If $content is null or false or a string, $content is returned unchanged.
2079          *
2080          * If the given Content object is not of a type that can be edited using the text base EditPage,
2081          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2082          * content.
2083          *
2084          * @param Content|null|bool|string $content
2085          * @return String the editable text form of the content.
2086          *
2087          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
2088          */
2089         protected function toEditText( $content ) {
2090                 if ( $content === null || $content === false ) {
2091                         return $content;
2092                 }
2093
2094                 if ( is_string( $content ) ) {
2095                         return $content;
2096                 }
2097
2098                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2099                         throw new MWException( "This content model can not be edited as text: "
2100                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2101                 }
2102
2103                 return $content->serialize( $this->contentFormat );
2104         }
2105
2106         /**
2107          * Turns the given text into a Content object by unserializing it.
2108          *
2109          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2110          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2111          * content.
2112          *
2113          * @param string|null|bool $text Text to unserialize
2114          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2115          *                 returned instead.
2116          *
2117          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2118          *          and $this->allowNonTextContent is not true.
2119          */
2120         protected function toEditContent( $text ) {
2121                 if ( $text === false || $text === null ) {
2122                         return $text;
2123                 }
2124
2125                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2126                         $this->contentModel, $this->contentFormat );
2127
2128                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2129                         throw new MWException( "This content model can not be edited as text: "
2130                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2131                 }
2132
2133                 return $content;
2134         }
2135
2136         /**
2137          * Send the edit form and related headers to $wgOut
2138          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2139          *     during form output near the top, for captchas and the like.
2140          */
2141         function showEditForm( $formCallback = null ) {
2142                 global $wgOut, $wgUser;
2143
2144                 wfProfileIn( __METHOD__ );
2145
2146                 # need to parse the preview early so that we know which templates are used,
2147                 # otherwise users with "show preview after edit box" will get a blank list
2148                 # we parse this near the beginning so that setHeaders can do the title
2149                 # setting work instead of leaving it in getPreviewText
2150                 $previewOutput = '';
2151                 if ( $this->formtype == 'preview' ) {
2152                         $previewOutput = $this->getPreviewText();
2153                 }
2154
2155                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2156
2157                 $this->setHeaders();
2158
2159                 if ( $this->showHeader() === false ) {
2160                         wfProfileOut( __METHOD__ );
2161                         return;
2162                 }
2163
2164                 $wgOut->addHTML( $this->editFormPageTop );
2165
2166                 if ( $wgUser->getOption( 'previewontop' ) ) {
2167                         $this->displayPreviewArea( $previewOutput, true );
2168                 }
2169
2170                 $wgOut->addHTML( $this->editFormTextTop );
2171
2172                 $showToolbar = true;
2173                 if ( $this->wasDeletedSinceLastEdit() ) {
2174                         if ( $this->formtype == 'save' ) {
2175                                 // Hide the toolbar and edit area, user can click preview to get it back
2176                                 // Add an confirmation checkbox and explanation.
2177                                 $showToolbar = false;
2178                         } else {
2179                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2180                                         'deletedwhileediting' );
2181                         }
2182                 }
2183
2184                 // @todo add EditForm plugin interface and use it here!
2185                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2186                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2187                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2188                         'enctype' => 'multipart/form-data' ) ) );
2189
2190                 if ( is_callable( $formCallback ) ) {
2191                         call_user_func_array( $formCallback, array( &$wgOut ) );
2192                 }
2193
2194                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2195
2196                 // Put these up at the top to ensure they aren't lost on early form submission
2197                 $this->showFormBeforeText();
2198
2199                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2200                         $username = $this->lastDelete->user_name;
2201                         $comment = $this->lastDelete->log_comment;
2202
2203                         // It is better to not parse the comment at all than to have templates expanded in the middle
2204                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2205                         $key = $comment === ''
2206                                 ? 'confirmrecreate-noreason'
2207                                 : 'confirmrecreate';
2208                         $wgOut->addHTML(
2209                                 '<div class="mw-confirm-recreate">' .
2210                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2211                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2212                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2213                                 ) .
2214                                 '</div>'
2215                         );
2216                 }
2217
2218                 # When the summary is hidden, also hide them on preview/show changes
2219                 if ( $this->nosummary ) {
2220                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2221                 }
2222
2223                 # If a blank edit summary was previously provided, and the appropriate
2224                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2225                 # user being bounced back more than once in the event that a summary
2226                 # is not required.
2227                 #####
2228                 # For a bit more sophisticated detection of blank summaries, hash the
2229                 # automatic one and pass that in the hidden field wpAutoSummary.
2230                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2231                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2232                 }
2233
2234                 if ( $this->undidRev ) {
2235                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2236                 }
2237
2238                 if ( $this->hasPresetSummary ) {
2239                         // If a summary has been preset using &summary= we don't want to prompt for
2240                         // a different summary. Only prompt for a summary if the summary is blanked.
2241                         // (Bug 17416)
2242                         $this->autoSumm = md5( '' );
2243                 }
2244
2245                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2246                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2247
2248                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2249
2250                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2251                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2252
2253                 if ( $this->section == 'new' ) {
2254                         $this->showSummaryInput( true, $this->summary );
2255                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2256                 }
2257
2258                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2259
2260                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2261                         $wgOut->addHTML( EditPage::getEditToolbar() );
2262                 }
2263
2264                 if ( $this->isConflict ) {
2265                         // In an edit conflict bypass the overridable content form method
2266                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2267                         // resolved between page source edits and custom ui edits using the
2268                         // custom edit ui.
2269                         $this->textbox2 = $this->textbox1;
2270
2271                         $content = $this->getCurrentContent();
2272                         $this->textbox1 = $this->toEditText( $content );
2273
2274                         $this->showTextbox1();
2275                 } else {
2276                         $this->showContentForm();
2277                 }
2278
2279                 $wgOut->addHTML( $this->editFormTextAfterContent );
2280
2281                 $this->showStandardInputs();
2282
2283                 $this->showFormAfterText();
2284
2285                 $this->showTosSummary();
2286
2287                 $this->showEditTools();
2288
2289                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2290
2291                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2292                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2293
2294                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2295                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2296
2297                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2298                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2299
2300                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2301
2302                 if ( $this->isConflict ) {
2303                         try {
2304                                 $this->showConflict();
2305                         } catch ( MWContentSerializationException $ex ) {
2306                                 // this can't really happen, but be nice if it does.
2307                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2308                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2309                         }
2310                 }
2311
2312                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2313
2314                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2315                         $this->displayPreviewArea( $previewOutput, false );
2316                 }
2317
2318                 wfProfileOut( __METHOD__ );
2319         }
2320
2321         /**
2322          * Extract the section title from current section text, if any.
2323          *
2324          * @param string $text
2325          * @return Mixed|string or false
2326          */
2327         public static function extractSectionTitle( $text ) {
2328                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2329                 if ( !empty( $matches[2] ) ) {
2330                         global $wgParser;
2331                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2332                 } else {
2333                         return false;
2334                 }
2335         }
2336
2337         protected function showHeader() {
2338                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2339
2340                 if ( $this->mTitle->isTalkPage() ) {
2341                         $wgOut->addWikiMsg( 'talkpagetext' );
2342                 }
2343
2344                 // Add edit notices
2345                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2346
2347                 if ( $this->isConflict ) {
2348                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2349                         $this->edittime = $this->mArticle->getTimestamp();
2350                 } else {
2351                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2352                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2353                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2354                                 // Someone is welcome to try refactoring though
2355                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2356                                 return false;
2357                         }
2358
2359                         if ( $this->section != '' && $this->section != 'new' ) {
2360                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2361                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2362                                         if ( $sectionTitle !== false ) {
2363                                                 $this->summary = "/* $sectionTitle */ ";
2364                                         }
2365                                 }
2366                         }
2367
2368                         if ( $this->missingComment ) {
2369                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2370                         }
2371
2372                         if ( $this->missingSummary && $this->section != 'new' ) {
2373                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2374                         }
2375
2376                         if ( $this->missingSummary && $this->section == 'new' ) {
2377                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2378                         }
2379
2380                         if ( $this->hookError !== '' ) {
2381                                 $wgOut->addWikiText( $this->hookError );
2382                         }
2383
2384                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2385                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2386                         }
2387
2388                         if ( $this->section != 'new' ) {
2389                                 $revision = $this->mArticle->getRevisionFetched();
2390                                 if ( $revision ) {
2391                                         // Let sysop know that this will make private content public if saved
2392
2393                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2394                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2395                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2396                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2397                                         }
2398
2399                                         if ( !$revision->isCurrent() ) {
2400                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2401                                                 $wgOut->addWikiMsg( 'editingold' );
2402                                         }
2403                                 } elseif ( $this->mTitle->exists() ) {
2404                                         // Something went wrong
2405
2406                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2407                                                 array( 'missing-revision', $this->oldid ) );
2408                                 }
2409                         }
2410                 }
2411
2412                 if ( wfReadOnly() ) {
2413                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2414                 } elseif ( $wgUser->isAnon() ) {
2415                         if ( $this->formtype != 'preview' ) {
2416                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2417                         } else {
2418                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2419                         }
2420                 } else {
2421                         if ( $this->isCssJsSubpage ) {
2422                                 # Check the skin exists
2423                                 if ( $this->isWrongCaseCssJsPage ) {
2424                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2425                                 }
2426                                 if ( $this->formtype !== 'preview' ) {
2427                                         if ( $this->isCssSubpage ) {
2428                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2429                                         }
2430
2431                                         if ( $this->isJsSubpage ) {
2432                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2433                                         }
2434                                 }
2435                         }
2436                 }
2437
2438                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2439                         # Is the title semi-protected?
2440                         if ( $this->mTitle->isSemiProtected() ) {
2441                                 $noticeMsg = 'semiprotectedpagewarning';
2442                         } else {
2443                                 # Then it must be protected based on static groups (regular)
2444                                 $noticeMsg = 'protectedpagewarning';
2445                         }
2446                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2447                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2448                 }
2449                 if ( $this->mTitle->isCascadeProtected() ) {
2450                         # Is this page under cascading protection from some source pages?
2451                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2452                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2453                         $cascadeSourcesCount = count( $cascadeSources );
2454                         if ( $cascadeSourcesCount > 0 ) {
2455                                 # Explain, and list the titles responsible
2456                                 foreach ( $cascadeSources as $page ) {
2457                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2458                                 }
2459                         }
2460                         $notice .= '</div>';
2461                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2462                 }
2463                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2464                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2465                                 array( 'lim' => 1,
2466                                         'showIfEmpty' => false,
2467                                         'msgKey' => array( 'titleprotectedwarning' ),
2468                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2469                 }
2470
2471                 if ( $this->kblength === false ) {
2472                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2473                 }
2474
2475                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2476                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2477                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2478                 } else {
2479                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2480                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2481                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2482                                 );
2483                         }
2484                 }
2485                 # Add header copyright warning
2486                 $this->showHeaderCopyrightWarning();
2487         }
2488
2489         /**
2490          * Standard summary input and label (wgSummary), abstracted so EditPage
2491          * subclasses may reorganize the form.
2492          * Note that you do not need to worry about the label's for=, it will be
2493          * inferred by the id given to the input. You can remove them both by
2494          * passing array( 'id' => false ) to $userInputAttrs.
2495          *
2496          * @param string $summary The value of the summary input
2497          * @param string $labelText The html to place inside the label
2498          * @param array $inputAttrs of attrs to use on the input
2499          * @param array $spanLabelAttrs of attrs to use on the span inside the label
2500          *
2501          * @return array An array in the format array( $label, $input )
2502          */
2503         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2504                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2505                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2506                         'id' => 'wpSummary',
2507                         'maxlength' => '200',
2508                         'tabindex' => '1',
2509                         'size' => 60,
2510                         'spellcheck' => 'true',
2511                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2512
2513                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2514                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2515                         'id' => "wpSummaryLabel"
2516                 );
2517
2518                 $label = null;
2519                 if ( $labelText ) {
2520                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2521                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2522                 }
2523
2524                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2525
2526                 return array( $label, $input );
2527         }
2528
2529         /**
2530          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2531          *                          up top, or false if this is the comment summary
2532          *                          down below the textarea
2533          * @param string $summary The text of the summary to display
2534          * @return String
2535          */
2536         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2537                 global $wgOut, $wgContLang;
2538                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2539                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2540                 if ( $isSubjectPreview ) {
2541                         if ( $this->nosummary ) {
2542                                 return;
2543                         }
2544                 } else {
2545                         if ( !$this->mShowSummaryField ) {
2546                                 return;
2547                         }
2548                 }
2549                 $summary = $wgContLang->recodeForEdit( $summary );
2550                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2551                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2552                 $wgOut->addHTML( "{$label} {$input}" );
2553         }
2554
2555         /**
2556          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2557          *                          up top, or false if this is the comment summary
2558          *                          down below the textarea
2559          * @param string $summary the text of the summary to display
2560          * @return String
2561          */
2562         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2563                 // avoid spaces in preview, gets always trimmed on save
2564                 $summary = trim( $summary );
2565                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2566                         return "";
2567                 }
2568
2569                 global $wgParser;
2570
2571                 if ( $isSubjectPreview ) {
2572                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2573                                 ->inContentLanguage()->text();
2574                 }
2575
2576                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2577
2578                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2579                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2580         }
2581
2582         protected function showFormBeforeText() {
2583                 global $wgOut;
2584                 $section = htmlspecialchars( $this->section );
2585                 $wgOut->addHTML( <<<HTML
2586 <input type='hidden' value="{$section}" name="wpSection" />
2587 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2588 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2589 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2590
2591 HTML
2592                 );
2593                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2594                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2595                 }
2596         }
2597
2598         protected function showFormAfterText() {
2599                 global $wgOut, $wgUser;
2600                 /**
2601                  * To make it harder for someone to slip a user a page
2602                  * which submits an edit form to the wiki without their
2603                  * knowledge, a random token is associated with the login
2604                  * session. If it's not passed back with the submission,
2605                  * we won't save the page, or render user JavaScript and
2606                  * CSS previews.
2607                  *
2608                  * For anon editors, who may not have a session, we just
2609                  * include the constant suffix to prevent editing from
2610                  * broken text-mangling proxies.
2611                  */
2612                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2613         }
2614
2615         /**
2616          * Subpage overridable method for printing the form for page content editing
2617          * By default this simply outputs wpTextbox1
2618          * Subclasses can override this to provide a custom UI for editing;
2619          * be it a form, or simply wpTextbox1 with a modified content that will be
2620          * reverse modified when extracted from the post data.
2621          * Note that this is basically the inverse for importContentFormData
2622          */
2623         protected function showContentForm() {
2624                 $this->showTextbox1();
2625         }
2626
2627         /**
2628          * Method to output wpTextbox1
2629          * The $textoverride method can be used by subclasses overriding showContentForm
2630          * to pass back to this method.
2631          *
2632          * @param array $customAttribs of html attributes to use in the textarea
2633          * @param string $textoverride optional text to override $this->textarea1 with
2634          */
2635         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2636                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2637                         $attribs = array( 'style' => 'display:none;' );
2638                 } else {
2639                         $classes = array(); // Textarea CSS
2640                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2641                                 # Is the title semi-protected?
2642                                 if ( $this->mTitle->isSemiProtected() ) {
2643                                         $classes[] = 'mw-textarea-sprotected';
2644                                 } else {
2645                                         # Then it must be protected based on static groups (regular)
2646                                         $classes[] = 'mw-textarea-protected';
2647                                 }
2648                                 # Is the title cascade-protected?
2649                                 if ( $this->mTitle->isCascadeProtected() ) {
2650                                         $classes[] = 'mw-textarea-cprotected';
2651                                 }
2652                         }
2653
2654                         $attribs = array( 'tabindex' => 1 );
2655
2656                         if ( is_array( $customAttribs ) ) {
2657                                 $attribs += $customAttribs;
2658                         }
2659
2660                         if ( count( $classes ) ) {
2661                                 if ( isset( $attribs['class'] ) ) {
2662                                         $classes[] = $attribs['class'];
2663                                 }
2664                                 $attribs['class'] = implode( ' ', $classes );
2665                         }
2666                 }
2667
2668                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2669         }
2670
2671         protected function showTextbox2() {
2672                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2673         }
2674
2675         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2676                 global $wgOut, $wgUser;
2677
2678                 $wikitext = $this->safeUnicodeOutput( $text );
2679                 if ( strval( $wikitext ) !== '' ) {
2680                         // Ensure there's a newline at the end, otherwise adding lines
2681                         // is awkward.
2682                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2683                         // mode will show an extra newline. A bit annoying.
2684                         $wikitext .= "\n";
2685                 }
2686
2687                 $attribs = $customAttribs + array(
2688                         'accesskey' => ',',
2689                         'id' => $name,
2690                         'cols' => $wgUser->getIntOption( 'cols' ),
2691                         'rows' => $wgUser->getIntOption( 'rows' ),
2692                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2693                 );
2694
2695                 $pageLang = $this->mTitle->getPageLanguage();
2696                 $attribs['lang'] = $pageLang->getCode();
2697                 $attribs['dir'] = $pageLang->getDir();
2698
2699                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2700         }
2701
2702         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2703                 global $wgOut;
2704                 $classes = array();
2705                 if ( $isOnTop ) {
2706                         $classes[] = 'ontop';
2707                 }
2708
2709                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2710
2711                 if ( $this->formtype != 'preview' ) {
2712                         $attribs['style'] = 'display: none;';
2713                 }
2714
2715                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2716
2717                 if ( $this->formtype == 'preview' ) {
2718                         $this->showPreview( $previewOutput );
2719                 }
2720
2721                 $wgOut->addHTML( '</div>' );
2722
2723                 if ( $this->formtype == 'diff' ) {
2724                         try {
2725                                 $this->showDiff();
2726                         } catch ( MWContentSerializationException $ex ) {
2727                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2728                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2729                         }
2730                 }
2731         }
2732
2733         /**
2734          * Append preview output to $wgOut.
2735          * Includes category rendering if this is a category page.
2736          *
2737          * @param string $text the HTML to be output for the preview.
2738          */
2739         protected function showPreview( $text ) {
2740                 global $wgOut;
2741                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2742                         $this->mArticle->openShowCategory();
2743                 }
2744                 # This hook seems slightly odd here, but makes things more
2745                 # consistent for extensions.
2746                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2747                 $wgOut->addHTML( $text );
2748                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2749                         $this->mArticle->closeShowCategory();
2750                 }
2751         }
2752
2753         /**
2754          * Get a diff between the current contents of the edit box and the
2755          * version of the page we're editing from.
2756          *
2757          * If this is a section edit, we'll replace the section as for final
2758          * save and then make a comparison.
2759          */
2760         function showDiff() {
2761                 global $wgUser, $wgContLang, $wgOut;
2762
2763                 $oldtitlemsg = 'currentrev';
2764                 # if message does not exist, show diff against the preloaded default
2765                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2766                         $oldtext = $this->mTitle->getDefaultMessageText();
2767                         if ( $oldtext !== false ) {
2768                                 $oldtitlemsg = 'defaultmessagetext';
2769                                 $oldContent = $this->toEditContent( $oldtext );
2770                         } else {
2771                                 $oldContent = null;
2772                         }
2773                 } else {
2774                         $oldContent = $this->getCurrentContent();
2775                 }
2776
2777                 $textboxContent = $this->toEditContent( $this->textbox1 );
2778
2779                 $newContent = $this->mArticle->replaceSectionContent(
2780                                                         $this->section, $textboxContent,
2781                                                         $this->summary, $this->edittime );
2782
2783                 if ( $newContent ) {
2784                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2785                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2786
2787                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2788                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2789                 }
2790
2791                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2792                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2793                         $newtitle = wfMessage( 'yourtext' )->parse();
2794
2795                         if ( !$oldContent ) {
2796                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2797                         }
2798
2799                         if ( !$newContent ) {
2800                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2801                         }
2802
2803                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2804                         $de->setContent( $oldContent, $newContent );
2805
2806                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2807                         $de->showDiffStyle();
2808                 } else {
2809                         $difftext = '';
2810                 }
2811
2812                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2813         }
2814
2815         /**
2816          * Show the header copyright warning.
2817          */
2818         protected function showHeaderCopyrightWarning() {
2819                 $msg = 'editpage-head-copy-warn';
2820                 if ( !wfMessage( $msg )->isDisabled() ) {
2821                         global $wgOut;
2822                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2823                                 'editpage-head-copy-warn' );
2824                 }
2825         }
2826
2827         /**
2828          * Give a chance for site and per-namespace customizations of
2829          * terms of service summary link that might exist separately
2830          * from the copyright notice.
2831          *
2832          * This will display between the save button and the edit tools,
2833          * so should remain short!
2834          */
2835         protected function showTosSummary() {
2836                 $msg = 'editpage-tos-summary';
2837                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2838                 if ( !wfMessage( $msg )->isDisabled() ) {
2839                         global $wgOut;
2840                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2841                         $wgOut->addWikiMsg( $msg );
2842                         $wgOut->addHTML( '</div>' );
2843                 }
2844         }
2845
2846         protected function showEditTools() {
2847                 global $wgOut;
2848                 $wgOut->addHTML( '<div class="mw-editTools">' .
2849                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2850                         '</div>' );
2851         }
2852
2853         /**
2854          * Get the copyright warning
2855          *
2856          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2857          */
2858         protected function getCopywarn() {
2859                 return self::getCopyrightWarning( $this->mTitle );
2860         }
2861
2862         public static function getCopyrightWarning( $title ) {
2863                 global $wgRightsText;
2864                 if ( $wgRightsText ) {
2865                         $copywarnMsg = array( 'copyrightwarning',
2866                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2867                                 $wgRightsText );
2868                 } else {
2869                         $copywarnMsg = array( 'copyrightwarning2',
2870                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2871                 }
2872                 // Allow for site and per-namespace customization of contribution/copyright notice.
2873                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2874
2875                 return "<div id=\"editpage-copywarn\">\n" .
2876                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2877         }
2878
2879         /**
2880          * Get the Limit report for page previews
2881          *
2882          * @since 1.22
2883          * @param ParserOutput $output ParserOutput object from the parse
2884          * @return string HTML
2885          */
2886         public static function getPreviewLimitReport( $output ) {
2887                 if ( !$output || !$output->getLimitReportData() ) {
2888                         return '';
2889                 }
2890
2891                 wfProfileIn( __METHOD__ );
2892
2893                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
2894                         wfMessage( 'limitreport-title' )->parseAsBlock()
2895                 );
2896
2897                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
2898                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
2899
2900                 $limitReport .= Html::openElement( 'table', array(
2901                         'class' => 'preview-limit-report wikitable'
2902                 ) ) .
2903                         Html::openElement( 'tbody' );
2904
2905                 foreach ( $output->getLimitReportData() as $key => $value ) {
2906                         if ( wfRunHooks( 'ParserLimitReportFormat',
2907                                 array( $key, $value, &$limitReport, true, true )
2908                         ) ) {
2909                                 $keyMsg = wfMessage( $key );
2910                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
2911                                 if ( !$valueMsg->exists() ) {
2912                                         $valueMsg = new RawMessage( '$1' );
2913                                 }
2914                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
2915                                         $limitReport .= Html::openElement( 'tr' ) .
2916                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
2917                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
2918                                                 Html::closeElement( 'tr' );
2919                                 }
2920                         }
2921                 }
2922
2923                 $limitReport .= Html::closeElement( 'tbody' ) .
2924                         Html::closeElement( 'table' ) .
2925                         Html::closeElement( 'div' );
2926
2927                 wfProfileOut( __METHOD__ );
2928
2929                 return $limitReport;
2930         }
2931
2932         protected function showStandardInputs( &$tabindex = 2 ) {
2933                 global $wgOut;
2934                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2935
2936                 if ( $this->section != 'new' ) {
2937                         $this->showSummaryInput( false, $this->summary );
2938                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2939                 }
2940
2941                 $checkboxes = $this->getCheckboxes( $tabindex,
2942                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2943                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2944
2945                 // Show copyright warning.
2946                 $wgOut->addWikiText( $this->getCopywarn() );
2947                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2948
2949                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2950                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2951
2952                 $cancel = $this->getCancelLink();
2953                 if ( $cancel !== '' ) {
2954                         $cancel .= Html::element( 'span',
2955                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
2956                                 wfMessage( 'pipe-separator' )->text() );
2957                 }
2958                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2959                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2960                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2961                         wfMessage( 'newwindow' )->parse();
2962                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2963                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2964                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
2965                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
2966                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
2967         }
2968
2969         /**
2970          * Show an edit conflict. textbox1 is already shown in showEditForm().
2971          * If you want to use another entry point to this function, be careful.
2972          */
2973         protected function showConflict() {
2974                 global $wgOut;
2975
2976                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2977                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2978
2979                         $content1 = $this->toEditContent( $this->textbox1 );
2980                         $content2 = $this->toEditContent( $this->textbox2 );
2981
2982                         $handler = ContentHandler::getForModelID( $this->contentModel );
2983                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2984                         $de->setContent( $content2, $content1 );
2985                         $de->showDiff(
2986                                 wfMessage( 'yourtext' )->parse(),
2987                                 wfMessage( 'storedversion' )->text()
2988                         );
2989
2990                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2991                         $this->showTextbox2();
2992                 }
2993         }
2994
2995         /**
2996          * @return string
2997          */
2998         public function getCancelLink() {
2999                 $cancelParams = array();
3000                 if ( !$this->isConflict && $this->oldid > 0 ) {
3001                         $cancelParams['oldid'] = $this->oldid;
3002                 }
3003
3004                 return Linker::linkKnown(
3005                         $this->getContextTitle(),
3006                         wfMessage( 'cancel' )->parse(),
3007                         array( 'id' => 'mw-editform-cancel' ),
3008                         $cancelParams
3009                 );
3010         }
3011
3012         /**
3013          * Returns the URL to use in the form's action attribute.
3014          * This is used by EditPage subclasses when simply customizing the action
3015          * variable in the constructor is not enough. This can be used when the
3016          * EditPage lives inside of a Special page rather than a custom page action.
3017          *
3018          * @param $title Title object for which is being edited (where we go to for &action= links)
3019          * @return string
3020          */
3021         protected function getActionURL( Title $title ) {
3022                 return $title->getLocalURL( array( 'action' => $this->action ) );
3023         }
3024
3025         /**
3026          * Check if a page was deleted while the user was editing it, before submit.
3027          * Note that we rely on the logging table, which hasn't been always there,
3028          * but that doesn't matter, because this only applies to brand new
3029          * deletes.
3030          */
3031         protected function wasDeletedSinceLastEdit() {
3032                 if ( $this->deletedSinceEdit !== null ) {
3033                         return $this->deletedSinceEdit;
3034                 }
3035
3036                 $this->deletedSinceEdit = false;
3037
3038                 if ( $this->mTitle->isDeletedQuick() ) {
3039                         $this->lastDelete = $this->getLastDelete();
3040                         if ( $this->lastDelete ) {
3041                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3042                                 if ( $deleteTime > $this->starttime ) {
3043                                         $this->deletedSinceEdit = true;
3044                                 }
3045                         }
3046                 }
3047
3048                 return $this->deletedSinceEdit;
3049         }
3050
3051         protected function getLastDelete() {
3052                 $dbr = wfGetDB( DB_SLAVE );
3053                 $data = $dbr->selectRow(
3054                         array( 'logging', 'user' ),
3055                         array(
3056                                 'log_type',
3057                                 'log_action',
3058                                 'log_timestamp',
3059                                 'log_user',
3060                                 'log_namespace',
3061                                 'log_title',
3062                                 'log_comment',
3063                                 'log_params',
3064                                 'log_deleted',
3065                                 'user_name'
3066                         ), array(
3067                                 'log_namespace' => $this->mTitle->getNamespace(),
3068                                 'log_title' => $this->mTitle->getDBkey(),
3069                                 'log_type' => 'delete',
3070                                 'log_action' => 'delete',
3071                                 'user_id=log_user'
3072                         ),
3073                         __METHOD__,
3074                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3075                 );
3076                 // Quick paranoid permission checks...
3077                 if ( is_object( $data ) ) {
3078                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3079                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3080                         }
3081
3082                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3083                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3084                         }
3085                 }
3086                 return $data;
3087         }
3088
3089         /**
3090          * Get the rendered text for previewing.
3091          * @throws MWException
3092          * @return string
3093          */
3094         function getPreviewText() {
3095                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3096
3097                 wfProfileIn( __METHOD__ );
3098
3099                 if ( $wgRawHtml && !$this->mTokenOk ) {
3100                         // Could be an offsite preview attempt. This is very unsafe if
3101                         // HTML is enabled, as it could be an attack.
3102                         $parsedNote = '';
3103                         if ( $this->textbox1 !== '' ) {
3104                                 // Do not put big scary notice, if previewing the empty
3105                                 // string, which happens when you initially edit
3106                                 // a category page, due to automatic preview-on-open.
3107                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3108                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3109                         }
3110                         wfProfileOut( __METHOD__ );
3111                         return $parsedNote;
3112                 }
3113
3114                 $note = '';
3115
3116                 try {
3117                         $content = $this->toEditContent( $this->textbox1 );
3118
3119                         $previewHTML = '';
3120                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
3121                                 wfProfileOut( __METHOD__ );
3122                                 return $previewHTML;
3123                         }
3124
3125                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3126                                 if ( $this->mTokenOkExceptSuffix ) {
3127                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3128
3129                                 } else {
3130                                         $note = wfMessage( 'session_fail_preview' )->plain();
3131                                 }
3132                         } elseif ( $this->incompleteForm ) {
3133                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3134                         } else {
3135                                 $note = wfMessage( 'previewnote' )->plain() .
3136                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
3137                         }
3138
3139                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3140                         $parserOptions->setEditSection( false );
3141                         $parserOptions->setIsPreview( true );
3142                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3143
3144                         # don't parse non-wikitext pages, show message about preview
3145                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3146                                 if ( $this->mTitle->isCssJsSubpage() ) {
3147                                         $level = 'user';
3148                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3149                                         $level = 'site';
3150                                 } else {
3151                                         $level = false;
3152                                 }
3153
3154                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3155                                         $format = 'css';
3156                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3157                                         $format = 'js';
3158                                 } else {
3159                                         $format = false;
3160                                 }
3161
3162                                 # Used messages to make sure grep find them:
3163                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3164                                 if ( $level && $format ) {
3165                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text() . "</div>";
3166                                 }
3167                         }
3168
3169                         $rt = $content->getRedirectChain();
3170                         if ( $rt ) {
3171                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
3172                         } else {
3173
3174                                 # If we're adding a comment, we need to show the
3175                                 # summary as the headline
3176                                 if ( $this->section === "new" && $this->summary !== "" ) {
3177                                         $content = $content->addSectionHeader( $this->summary );
3178                                 }
3179
3180                                 $hook_args = array( $this, &$content );
3181                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3182                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3183
3184                                 $parserOptions->enableLimitReport();
3185
3186                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3187                                 # But it's now deprecated, so never mind
3188
3189                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3190                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3191
3192                                 $previewHTML = $parserOutput->getText();
3193                                 $this->mParserOutput = $parserOutput;
3194                                 $wgOut->addParserOutputNoText( $parserOutput );
3195
3196                                 if ( count( $parserOutput->getWarnings() ) ) {
3197                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3198                                 }
3199                         }
3200                 } catch ( MWContentSerializationException $ex ) {
3201                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3202                         $note .= "\n\n" . $m->parse();
3203                         $previewHTML = '';
3204                 }
3205
3206                 if ( $this->isConflict ) {
3207                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3208                 } else {
3209                         $conflict = '<hr />';
3210                 }
3211
3212                 $previewhead = "<div class='previewnote'>\n" .
3213                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3214                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3215
3216                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3217                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3218                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3219                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3220
3221                 wfProfileOut( __METHOD__ );
3222                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3223         }
3224
3225         /**
3226          * @return Array
3227          */
3228         function getTemplates() {
3229                 if ( $this->preview || $this->section != '' ) {
3230                         $templates = array();
3231                         if ( !isset( $this->mParserOutput ) ) {
3232                                 return $templates;
3233                         }
3234                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3235                                 foreach ( array_keys( $template ) as $dbk ) {
3236                                         $templates[] = Title::makeTitle( $ns, $dbk );
3237                                 }
3238                         }
3239                         return $templates;
3240                 } else {
3241                         return $this->mTitle->getTemplateLinksFrom();
3242                 }
3243         }
3244
3245         /**
3246          * Shows a bulletin board style toolbar for common editing functions.
3247          * It can be disabled in the user preferences.
3248          * The necessary JavaScript code can be found in skins/common/edit.js.
3249          *
3250          * @return string
3251          */
3252         static function getEditToolbar() {
3253                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3254                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3255
3256                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3257
3258                 /**
3259                  * $toolarray is an array of arrays each of which includes the
3260                  * filename of the button image (without path), the opening
3261                  * tag, the closing tag, optionally a sample text that is
3262                  * inserted between the two when no selection is highlighted
3263                  * and.  The tip text is shown when the user moves the mouse
3264                  * over the button.
3265                  *
3266                  * Also here: accesskeys (key), which are not used yet until
3267                  * someone can figure out a way to make them work in
3268                  * IE. However, we should make sure these keys are not defined
3269                  * on the edit page.
3270                  */
3271                 $toolarray = array(
3272                         array(
3273                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3274                                 'id'     => 'mw-editbutton-bold',
3275                                 'open'   => '\'\'\'',
3276                                 'close'  => '\'\'\'',
3277                                 'sample' => wfMessage( 'bold_sample' )->text(),
3278                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3279                                 'key'    => 'B'
3280                         ),
3281                         array(
3282                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3283                                 'id'     => 'mw-editbutton-italic',
3284                                 'open'   => '\'\'',
3285                                 'close'  => '\'\'',
3286                                 'sample' => wfMessage( 'italic_sample' )->text(),
3287                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3288                                 'key'    => 'I'
3289                         ),
3290                         array(
3291                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3292                                 'id'     => 'mw-editbutton-link',
3293                                 'open'   => '[[',
3294                                 'close'  => ']]',
3295                                 'sample' => wfMessage( 'link_sample' )->text(),
3296                                 'tip'    => wfMessage( 'link_tip' )->text(),
3297                                 'key'    => 'L'
3298                         ),
3299                         array(
3300                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3301                                 'id'     => 'mw-editbutton-extlink',
3302                                 'open'   => '[',
3303                                 'close'  => ']',
3304                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3305                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3306                                 'key'    => 'X'
3307                         ),
3308                         array(
3309                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3310                                 'id'     => 'mw-editbutton-headline',
3311                                 'open'   => "\n== ",
3312                                 'close'  => " ==\n",
3313                                 'sample' => wfMessage( 'headline_sample' )->text(),
3314                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3315                                 'key'    => 'H'
3316                         ),
3317                         $imagesAvailable ? array(
3318                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3319                                 'id'     => 'mw-editbutton-image',
3320                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3321                                 'close'  => ']]',
3322                                 'sample' => wfMessage( 'image_sample' )->text(),
3323                                 'tip'    => wfMessage( 'image_tip' )->text(),
3324                                 'key'    => 'D',
3325                         ) : false,
3326                         $imagesAvailable ? array(
3327                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3328                                 'id'     => 'mw-editbutton-media',
3329                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3330                                 'close'  => ']]',
3331                                 'sample' => wfMessage( 'media_sample' )->text(),
3332                                 'tip'    => wfMessage( 'media_tip' )->text(),
3333                                 'key'    => 'M'
3334                         ) : false,
3335                         $wgUseTeX ? array(
3336                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3337                                 'id'     => 'mw-editbutton-math',
3338                                 'open'   => "<math>",
3339                                 'close'  => "</math>",
3340                                 'sample' => wfMessage( 'math_sample' )->text(),
3341                                 'tip'    => wfMessage( 'math_tip' )->text(),
3342                                 'key'    => 'C'
3343                         ) : false,
3344                         array(
3345                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3346                                 'id'     => 'mw-editbutton-nowiki',
3347                                 'open'   => "<nowiki>",
3348                                 'close'  => "</nowiki>",
3349                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3350                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3351                                 'key'    => 'N'
3352                         ),
3353                         array(
3354                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3355                                 'id'     => 'mw-editbutton-signature',
3356                                 'open'   => '--~~~~',
3357                                 'close'  => '',
3358                                 'sample' => '',
3359                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3360                                 'key'    => 'Y'
3361                         ),
3362                         array(
3363                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3364                                 'id'     => 'mw-editbutton-hr',
3365                                 'open'   => "\n----\n",
3366                                 'close'  => '',
3367                                 'sample' => '',
3368                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3369                                 'key'    => 'R'
3370                         )
3371                 );
3372
3373                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3374                 foreach ( $toolarray as $tool ) {
3375                         if ( !$tool ) {
3376                                 continue;
3377                         }
3378
3379                         $params = array(
3380                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3381                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3382                                 // Older browsers show a "speedtip" type message only for ALT.
3383                                 // Ideally these should be different, realistically they
3384                                 // probably don't need to be.
3385                                 $tip = $tool['tip'],
3386                                 $open = $tool['open'],
3387                                 $close = $tool['close'],
3388                                 $sample = $tool['sample'],
3389                                 $cssId = $tool['id'],
3390                         );
3391
3392                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3393                 }
3394
3395                 // This used to be called on DOMReady from mediawiki.action.edit, which
3396                 // ended up causing race conditions with the setup code above.
3397                 $script .= "\n" .
3398                         "// Create button bar\n" .
3399                         "$(function() { mw.toolbar.init(); } );\n";
3400
3401                 $script .= '});';
3402                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3403
3404                 $toolbar = '<div id="toolbar"></div>';
3405
3406                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3407
3408                 return $toolbar;
3409         }
3410
3411         /**
3412          * Returns an array of html code of the following checkboxes:
3413          * minor and watch
3414          *
3415          * @param int $tabindex Current tabindex
3416          * @param array $checked of checkbox => bool, where bool indicates the checked
3417          *                 status of the checkbox
3418          *
3419          * @return array
3420          */
3421         public function getCheckboxes( &$tabindex, $checked ) {
3422                 global $wgUser;
3423
3424                 $checkboxes = array();
3425
3426                 // don't show the minor edit checkbox if it's a new page or section
3427                 if ( !$this->isNew ) {
3428                         $checkboxes['minor'] = '';
3429                         $minorLabel = wfMessage( 'minoredit' )->parse();
3430                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3431                                 $attribs = array(
3432                                         'tabindex' => ++$tabindex,
3433                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3434                                         'id' => 'wpMinoredit',
3435                                 );
3436                                 $checkboxes['minor'] =
3437                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3438                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3439                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3440                                         ">{$minorLabel}</label>";
3441                         }
3442                 }
3443
3444                 $watchLabel = wfMessage( 'watchthis' )->parse();
3445                 $checkboxes['watch'] = '';
3446                 if ( $wgUser->isLoggedIn() ) {
3447                         $attribs = array(
3448                                 'tabindex' => ++$tabindex,
3449                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3450                                 'id' => 'wpWatchthis',
3451                         );
3452                         $checkboxes['watch'] =
3453                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3454                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3455                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3456                                 ">{$watchLabel}</label>";
3457                 }
3458                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3459                 return $checkboxes;
3460         }
3461
3462         /**
3463          * Returns an array of html code of the following buttons:
3464          * save, diff, preview and live
3465          *
3466          * @param int $tabindex Current tabindex
3467          *
3468          * @return array
3469          */
3470         public function getEditButtons( &$tabindex ) {
3471                 $buttons = array();
3472
3473                 $temp = array(
3474                         'id' => 'wpSave',
3475                         'name' => 'wpSave',
3476                         'type' => 'submit',
3477                         'tabindex' => ++$tabindex,
3478                         'value' => wfMessage( 'savearticle' )->text(),
3479                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3480                         'title' => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3481                 );
3482                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3483
3484                 ++$tabindex; // use the same for preview and live preview
3485                 $temp = array(
3486                         'id' => 'wpPreview',
3487                         'name' => 'wpPreview',
3488                         'type' => 'submit',
3489                         'tabindex' => $tabindex,
3490                         'value' => wfMessage( 'showpreview' )->text(),
3491                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3492                         'title' => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3493                 );
3494                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3495                 $buttons['live'] = '';
3496
3497                 $temp = array(
3498                         'id' => 'wpDiff',
3499                         'name' => 'wpDiff',
3500                         'type' => 'submit',
3501                         'tabindex' => ++$tabindex,
3502                         'value' => wfMessage( 'showdiff' )->text(),
3503                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3504                         'title' => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3505                 );
3506                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3507
3508                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3509                 return $buttons;
3510         }
3511
3512         /**
3513          * Output preview text only. This can be sucked into the edit page
3514          * via JavaScript, and saves the server time rendering the skin as
3515          * well as theoretically being more robust on the client (doesn't
3516          * disturb the edit box's undo history, won't eat your text on
3517          * failure, etc).
3518          *
3519          * @todo This doesn't include category or interlanguage links.
3520          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3521          *       or something...</s>" that might also require more skin
3522          *       initialization, so check whether that's a problem.
3523          */
3524         function livePreview() {
3525                 global $wgOut;
3526                 $wgOut->disable();
3527                 header( 'Content-type: text/xml; charset=utf-8' );
3528                 header( 'Cache-control: no-cache' );
3529
3530                 $previewText = $this->getPreviewText();
3531                 #$categories = $skin->getCategoryLinks();
3532
3533                 $s =
3534                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3535                 Xml::tags( 'livepreview', null,
3536                         Xml::element( 'preview', null, $previewText )
3537                         #.      Xml::element( 'category', null, $categories )
3538                 );
3539                 echo $s;
3540         }
3541
3542         /**
3543          * Call the stock "user is blocked" page
3544          *
3545          * @deprecated in 1.19; throw an exception directly instead
3546          */
3547         function blockedPage() {
3548                 wfDeprecated( __METHOD__, '1.19' );
3549                 global $wgUser;
3550
3551                 throw new UserBlockedError( $wgUser->getBlock() );
3552         }
3553
3554         /**
3555          * Produce the stock "please login to edit pages" page
3556          *
3557          * @deprecated in 1.19; throw an exception directly instead
3558          */
3559         function userNotLoggedInPage() {
3560                 wfDeprecated( __METHOD__, '1.19' );
3561                 throw new PermissionsError( 'edit' );
3562         }
3563
3564         /**
3565          * Show an error page saying to the user that he has insufficient permissions
3566          * to create a new page
3567          *
3568          * @deprecated in 1.19; throw an exception directly instead
3569          */
3570         function noCreatePermission() {
3571                 wfDeprecated( __METHOD__, '1.19' );
3572                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3573                 throw new PermissionsError( $permission );
3574         }
3575
3576         /**
3577          * Creates a basic error page which informs the user that
3578          * they have attempted to edit a nonexistent section.
3579          */
3580         function noSuchSectionPage() {
3581                 global $wgOut;
3582
3583                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3584
3585                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3586                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3587                 $wgOut->addHTML( $res );
3588
3589                 $wgOut->returnToMain( false, $this->mTitle );
3590         }
3591
3592         /**
3593          * Produce the stock "your edit contains spam" page
3594          *
3595          * @param string|bool $match Text which triggered one or more filters
3596          * @deprecated since 1.17 Use method spamPageWithContent() instead
3597          */
3598         static function spamPage( $match = false ) {
3599                 wfDeprecated( __METHOD__, '1.17' );
3600
3601                 global $wgOut, $wgTitle;
3602
3603                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3604
3605                 $wgOut->addHTML( '<div id="spamprotected">' );
3606                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3607                 if ( $match ) {
3608                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3609                 }
3610                 $wgOut->addHTML( '</div>' );
3611
3612                 $wgOut->returnToMain( false, $wgTitle );
3613         }
3614
3615         /**
3616          * Show "your edit contains spam" page with your diff and text
3617          *
3618          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3619          */
3620         public function spamPageWithContent( $match = false ) {
3621                 global $wgOut, $wgLang;
3622                 $this->textbox2 = $this->textbox1;
3623
3624                 if ( is_array( $match ) ) {
3625                         $match = $wgLang->listToText( $match );
3626                 }
3627                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3628
3629                 $wgOut->addHTML( '<div id="spamprotected">' );
3630                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3631                 if ( $match ) {
3632                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3633                 }
3634                 $wgOut->addHTML( '</div>' );
3635
3636                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3637                 $this->showDiff();
3638
3639                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3640                 $this->showTextbox2();
3641
3642                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3643         }
3644
3645         /**
3646          * Format an anchor fragment as it would appear for a given section name
3647          * @param $text String
3648          * @return String
3649          * @private
3650          */
3651         function sectionAnchor( $text ) {
3652                 global $wgParser;
3653                 return $wgParser->guessSectionNameFromWikiText( $text );
3654         }
3655
3656         /**
3657          * Check if the browser is on a blacklist of user-agents known to
3658          * mangle UTF-8 data on form submission. Returns true if Unicode
3659          * should make it through, false if it's known to be a problem.
3660          * @return bool
3661          * @private
3662          */
3663         function checkUnicodeCompliantBrowser() {
3664                 global $wgBrowserBlackList, $wgRequest;
3665
3666                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3667                 if ( $currentbrowser === false ) {
3668                         // No User-Agent header sent? Trust it by default...
3669                         return true;
3670                 }
3671
3672                 foreach ( $wgBrowserBlackList as $browser ) {
3673                         if ( preg_match( $browser, $currentbrowser ) ) {
3674                                 return false;
3675                         }
3676                 }
3677                 return true;
3678         }
3679
3680         /**
3681          * Filter an input field through a Unicode de-armoring process if it
3682          * came from an old browser with known broken Unicode editing issues.
3683          *
3684          * @param $request WebRequest
3685          * @param $field String
3686          * @return String
3687          * @private
3688          */
3689         function safeUnicodeInput( $request, $field ) {
3690                 $text = rtrim( $request->getText( $field ) );
3691                 return $request->getBool( 'safemode' )
3692                         ? $this->unmakesafe( $text )
3693                         : $text;
3694         }
3695
3696         /**
3697          * @param $request WebRequest
3698          * @param $text string
3699          * @return string
3700          */
3701         function safeUnicodeText( $request, $text ) {
3702                 $text = rtrim( $text );
3703                 return $request->getBool( 'safemode' )
3704                         ? $this->unmakesafe( $text )
3705                         : $text;
3706         }
3707
3708         /**
3709          * Filter an output field through a Unicode armoring process if it is
3710          * going to an old browser with known broken Unicode editing issues.
3711          *
3712          * @param $text String
3713          * @return String
3714          * @private
3715          */
3716         function safeUnicodeOutput( $text ) {
3717                 global $wgContLang;
3718                 $codedText = $wgContLang->recodeForEdit( $text );
3719                 return $this->checkUnicodeCompliantBrowser()
3720                         ? $codedText
3721                         : $this->makesafe( $codedText );
3722         }
3723
3724         /**
3725          * A number of web browsers are known to corrupt non-ASCII characters
3726          * in a UTF-8 text editing environment. To protect against this,
3727          * detected browsers will be served an armored version of the text,
3728          * with non-ASCII chars converted to numeric HTML character references.
3729          *
3730          * Preexisting such character references will have a 0 added to them
3731          * to ensure that round-trips do not alter the original data.
3732          *
3733          * @param $invalue String
3734          * @return String
3735          * @private
3736          */
3737         function makesafe( $invalue ) {
3738                 // Armor existing references for reversibility.
3739                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3740
3741                 $bytesleft = 0;
3742                 $result = "";
3743                 $working = 0;
3744                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3745                         $bytevalue = ord( $invalue[$i] );
3746                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3747                                 $result .= chr( $bytevalue );
3748                                 $bytesleft = 0;
3749                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3750                                 $working = $working << 6;
3751                                 $working += ( $bytevalue & 0x3F );
3752                                 $bytesleft--;
3753                                 if ( $bytesleft <= 0 ) {
3754                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3755                                 }
3756                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3757                                 $working = $bytevalue & 0x1F;
3758                                 $bytesleft = 1;
3759                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3760                                 $working = $bytevalue & 0x0F;
3761                                 $bytesleft = 2;
3762                         } else { // 1111 0xxx
3763                                 $working = $bytevalue & 0x07;
3764                                 $bytesleft = 3;
3765                         }
3766                 }
3767                 return $result;
3768         }
3769
3770         /**
3771          * Reverse the previously applied transliteration of non-ASCII characters
3772          * back to UTF-8. Used to protect data from corruption by broken web browsers
3773          * as listed in $wgBrowserBlackList.
3774          *
3775          * @param $invalue String
3776          * @return String
3777          * @private
3778          */
3779         function unmakesafe( $invalue ) {
3780                 $result = "";
3781                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3782                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3783                                 $i += 3;
3784                                 $hexstring = "";
3785                                 do {
3786                                         $hexstring .= $invalue[$i];
3787                                         $i++;
3788                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3789
3790                                 // Do some sanity checks. These aren't needed for reversibility,
3791                                 // but should help keep the breakage down if the editor
3792                                 // breaks one of the entities whilst editing.
3793                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3794                                         $codepoint = hexdec( $hexstring );
3795                                         $result .= codepointToUtf8( $codepoint );
3796                                 } else {
3797                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3798                                 }
3799                         } else {
3800                                 $result .= substr( $invalue, $i, 1 );
3801                         }
3802                 }
3803                 // reverse the transform that we made for reversibility reasons.
3804                 return strtr( $result, array( "&#x0" => "&#x" ) );
3805         }
3806 }