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