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                                         // Give grep a chance to find the usages: undo-success, undo-failure, undo-norev
 971                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 972                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 973                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 974                                 }
 975
 976                                 if ( $content === false ) {
 977                                         $content = $this->getOriginalContent();
 978                                 }
 979                         }
 980                 }
 981
 982                 wfProfileOut( __METHOD__ );
 983                 return $content;
 984         }
 985
 986         /**
 987          * Get the content of the wanted revision, without section extraction.
 988          *
 989          * The result of this function can be used to compare user's input with
 990          * section replaced in its context (using WikiPage::replaceSection())
 991          * to the original text of the edit.
 992          *
 993          * This differs from Article::getContent() that when a missing revision is
 994          * encountered the result will be null and not the
 995          * 'missing-revision' message.
 996          *
 997          * @since 1.19
 998          * @return Content|null
 999          */
1000         private function getOriginalContent() {
1001                 if ( $this->section == 'new' ) {
1002                         return $this->getCurrentContent();
1003                 }
1004                 $revision = $this->mArticle->getRevisionFetched();
1005                 if ( $revision === null ) {
1006                         if ( !$this->contentModel ) {
1007                                 $this->contentModel = $this->getTitle()->getContentModel();
1008                         }
1009                         $handler = ContentHandler::getForModelID( $this->contentModel );
1010
1011                         return $handler->makeEmptyContent();
1012                 }
1013                 $content = $revision->getContent();
1014                 return $content;
1015         }
1016
1017         /**
1018          * Get the current content of the page. This is basically similar to
1019          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1020          * content object is returned instead of null.
1021          *
1022          * @since 1.21
1023          * @return Content
1024          */
1025         protected function getCurrentContent() {
1026                 $rev = $this->mArticle->getRevision();
1027                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1028
1029                 if ( $content === false || $content === null ) {
1030                         if ( !$this->contentModel ) {
1031                                 $this->contentModel = $this->getTitle()->getContentModel();
1032                         }
1033                         $handler = ContentHandler::getForModelID( $this->contentModel );
1034
1035                         return $handler->makeEmptyContent();
1036                 } else {
1037                         # nasty side-effect, but needed for consistency
1038                         $this->contentModel = $rev->getContentModel();
1039                         $this->contentFormat = $rev->getContentFormat();
1040
1041                         return $content;
1042                 }
1043         }
1044
1045         /**
1046          * Use this method before edit() to preload some text into the edit box
1047          *
1048          * @param $text string
1049          * @deprecated since 1.21, use setPreloadedContent() instead.
1050          */
1051         public function setPreloadedText( $text ) {
1052                 ContentHandler::deprecated( __METHOD__, "1.21" );
1053
1054                 $content = $this->toEditContent( $text );
1055
1056                 $this->setPreloadedContent( $content );
1057         }
1058
1059         /**
1060          * Use this method before edit() to preload some content into the edit box
1061          *
1062          * @param $content Content
1063          *
1064          * @since 1.21
1065          */
1066         public function setPreloadedContent( Content $content ) {
1067                 $this->mPreloadContent = $content;
1068         }
1069
1070         /**
1071          * Get the contents to be preloaded into the box, either set by
1072          * an earlier setPreloadText() or by loading the given page.
1073          *
1074          * @param string $preload representing the title to preload from.
1075          *
1076          * @return String
1077          *
1078          * @deprecated since 1.21, use getPreloadedContent() instead
1079          */
1080         protected function getPreloadedText( $preload ) {
1081                 ContentHandler::deprecated( __METHOD__, "1.21" );
1082
1083                 $content = $this->getPreloadedContent( $preload );
1084                 $text = $this->toEditText( $content );
1085
1086                 return $text;
1087         }
1088
1089         /**
1090          * Get the contents to be preloaded into the box, either set by
1091          * an earlier setPreloadText() or by loading the given page.
1092          *
1093          * @param string $preload representing the title to preload from.
1094          *
1095          * @return Content
1096          *
1097          * @since 1.21
1098          */
1099         protected function getPreloadedContent( $preload ) {
1100                 global $wgUser;
1101
1102                 if ( !empty( $this->mPreloadContent ) ) {
1103                         return $this->mPreloadContent;
1104                 }
1105
1106                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1107
1108                 if ( $preload === '' ) {
1109                         return $handler->makeEmptyContent();
1110                 }
1111
1112                 $title = Title::newFromText( $preload );
1113                 # Check for existence to avoid getting MediaWiki:Noarticletext
1114                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1115                         //TODO: somehow show a warning to the user!
1116                         return $handler->makeEmptyContent();
1117                 }
1118
1119                 $page = WikiPage::factory( $title );
1120                 if ( $page->isRedirect() ) {
1121                         $title = $page->getRedirectTarget();
1122                         # Same as before
1123                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1124                                 //TODO: somehow show a warning to the user!
1125                                 return $handler->makeEmptyContent();
1126                         }
1127                         $page = WikiPage::factory( $title );
1128                 }
1129
1130                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1131                 $content = $page->getContent( Revision::RAW );
1132
1133                 if ( !$content ) {
1134                         //TODO: somehow show a warning to the user!
1135                         return $handler->makeEmptyContent();
1136                 }
1137
1138                 if ( $content->getModel() !== $handler->getModelID() ) {
1139                         $converted = $content->convert( $handler->getModelID() );
1140
1141                         if ( !$converted ) {
1142                                 //TODO: somehow show a warning to the user!
1143                                 wfDebug( "Attempt to preload incompatible content: "
1144                                                 . "can't convert " . $content->getModel()
1145                                                 . " to " . $handler->getModelID() );
1146
1147                                 return $handler->makeEmptyContent();
1148                         }
1149
1150                         $content = $converted;
1151                 }
1152
1153                 return $content->preloadTransform( $title, $parserOptions );
1154         }
1155
1156         /**
1157          * Make sure the form isn't faking a user's credentials.
1158          *
1159          * @param $request WebRequest
1160          * @return bool
1161          * @private
1162          */
1163         function tokenOk( &$request ) {
1164                 global $wgUser;
1165                 $token = $request->getVal( 'wpEditToken' );
1166                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1167                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1168                 return $this->mTokenOk;
1169         }
1170
1171         /**
1172          * Sets post-edit cookie indicating the user just saved a particular revision.
1173          *
1174          * This uses a temporary cookie for each revision ID so separate saves will never
1175          * interfere with each other.
1176          *
1177          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1178          * the redirect.  It must be clearable by JavaScript code, so it must not be
1179          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1180          * variable.
1181          *
1182          * We use a path of '/' since wgCookiePath is not exposed to JS
1183          *
1184          * If the variable were set on the server, it would be cached, which is unwanted
1185          * since the post-edit state should only apply to the load right after the save.
1186          */
1187         protected function setPostEditCookie() {
1188                 $revisionId = $this->mArticle->getLatest();
1189                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1190
1191                 $response = RequestContext::getMain()->getRequest()->response();
1192                 $response->setcookie( $postEditKey, '1', time() + self::POST_EDIT_COOKIE_DURATION, array(
1193                         'path' => '/',
1194                         'httpOnly' => false,
1195                 ) );
1196         }
1197
1198         /**
1199          * Attempt submission
1200          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1201          * @return bool false if output is done, true if the rest of the form should be displayed
1202          */
1203         function attemptSave() {
1204                 global $wgUser, $wgOut;
1205
1206                 $resultDetails = false;
1207                 # Allow bots to exempt some edits from bot flagging
1208                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1209                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1210                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1211                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1212                         $this->didSave = true;
1213                         if ( !$resultDetails['nullEdit'] ) {
1214                                 $this->setPostEditCookie();
1215                         }
1216                 }
1217
1218                 switch ( $status->value ) {
1219                         case self::AS_HOOK_ERROR_EXPECTED:
1220                         case self::AS_CONTENT_TOO_BIG:
1221                         case self::AS_ARTICLE_WAS_DELETED:
1222                         case self::AS_CONFLICT_DETECTED:
1223                         case self::AS_SUMMARY_NEEDED:
1224                         case self::AS_TEXTBOX_EMPTY:
1225                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1226                         case self::AS_END:
1227                                 return true;
1228
1229                         case self::AS_HOOK_ERROR:
1230                                 return false;
1231
1232                         case self::AS_PARSE_ERROR:
1233                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1234                                 return true;
1235
1236                         case self::AS_SUCCESS_NEW_ARTICLE:
1237                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1238                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1239                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1240                                 return false;
1241
1242                         case self::AS_SUCCESS_UPDATE:
1243                                 $extraQuery = '';
1244                                 $sectionanchor = $resultDetails['sectionanchor'];
1245
1246                                 // Give extensions a chance to modify URL query on update
1247                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1248
1249                                 if ( $resultDetails['redirect'] ) {
1250                                         if ( $extraQuery == '' ) {
1251                                                 $extraQuery = 'redirect=no';
1252                                         } else {
1253                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1254                                         }
1255                                 }
1256                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1257                                 return false;
1258
1259                         case self::AS_BLANK_ARTICLE:
1260                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1261                                 return false;
1262
1263                         case self::AS_SPAM_ERROR:
1264                                 $this->spamPageWithContent( $resultDetails['spam'] );
1265                                 return false;
1266
1267                         case self::AS_BLOCKED_PAGE_FOR_USER:
1268                                 throw new UserBlockedError( $wgUser->getBlock() );
1269
1270                         case self::AS_IMAGE_REDIRECT_ANON:
1271                         case self::AS_IMAGE_REDIRECT_LOGGED:
1272                                 throw new PermissionsError( 'upload' );
1273
1274                         case self::AS_READ_ONLY_PAGE_ANON:
1275                         case self::AS_READ_ONLY_PAGE_LOGGED:
1276                                 throw new PermissionsError( 'edit' );
1277
1278                         case self::AS_READ_ONLY_PAGE:
1279                                 throw new ReadOnlyError;
1280
1281                         case self::AS_RATE_LIMITED:
1282                                 throw new ThrottledError();
1283
1284                         case self::AS_NO_CREATE_PERMISSION:
1285                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1286                                 throw new PermissionsError( $permission );
1287
1288                         default:
1289                                 // We don't recognize $status->value. The only way that can happen
1290                                 // is if an extension hook aborted from inside ArticleSave.
1291                                 // Render the status object into $this->hookError
1292                                 // FIXME this sucks, we should just use the Status object throughout
1293                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1294                                         '</div>';
1295                                 return true;
1296                 }
1297         }
1298
1299         /**
1300          * Run hooks that can filter edits just before they get saved.
1301          *
1302          * @param Content $content the Content to filter.
1303          * @param Status  $status for reporting the outcome to the caller
1304          * @param User    $user the user performing the edit
1305          *
1306          * @return bool
1307          */
1308         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1309                 // Run old style post-section-merge edit filter
1310                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1311                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1312
1313                         # Error messages etc. could be handled within the hook...
1314                         $status->fatal( 'hookaborted' );
1315                         $status->value = self::AS_HOOK_ERROR;
1316                         return false;
1317                 } elseif ( $this->hookError != '' ) {
1318                         # ...or the hook could be expecting us to produce an error
1319                         $status->fatal( 'hookaborted' );
1320                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1321                         return false;
1322                 }
1323
1324                 // Run new style post-section-merge edit filter
1325                 if ( !wfRunHooks( 'EditFilterMergedContent',
1326                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1327                                 $user, $this->minoredit ) ) ) {
1328
1329                         # Error messages etc. could be handled within the hook...
1330                         // XXX: $status->value may already be something informative...
1331                         $this->hookError = $status->getWikiText();
1332                         $status->fatal( 'hookaborted' );
1333                         $status->value = self::AS_HOOK_ERROR;
1334                         return false;
1335                 } elseif ( !$status->isOK() ) {
1336                         # ...or the hook could be expecting us to produce an error
1337                         // FIXME this sucks, we should just use the Status object throughout
1338                         $this->hookError = $status->getWikiText();
1339                         $status->fatal( 'hookaborted' );
1340                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1341                         return false;
1342                 }
1343
1344                 return true;
1345         }
1346
1347         /**
1348          * Attempt submission (no UI)
1349          *
1350          * @param array $result array to add statuses to, currently with the possible keys:
1351          *  spam - string - Spam string from content if any spam is detected by matchSpamRegex
1352          *  sectionanchor - string - Section anchor for a section save
1353          *  nullEdit - boolean - Set if doEditContent is OK.  True if null edit, false otherwise.
1354          *  redirect - boolean -  Set if doEditContent is OK.  True if resulting revision is a redirect
1355          * @param bool $bot True if edit is being made under the bot right.
1356          *
1357          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1358          *
1359          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1360          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1361          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1362          */
1363         function internalAttemptSave( &$result, $bot = false ) {
1364                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1365
1366                 $status = Status::newGood();
1367
1368                 wfProfileIn( __METHOD__ );
1369                 wfProfileIn( __METHOD__ . '-checks' );
1370
1371                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1372                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1373                         $status->fatal( 'hookaborted' );
1374                         $status->value = self::AS_HOOK_ERROR;
1375                         wfProfileOut( __METHOD__ . '-checks' );
1376                         wfProfileOut( __METHOD__ );
1377                         return $status;
1378                 }
1379
1380                 try {
1381                         # Construct Content object
1382                         $textbox_content = $this->toEditContent( $this->textbox1 );
1383                 } catch ( MWContentSerializationException $ex ) {
1384                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1385                         $status->value = self::AS_PARSE_ERROR;
1386                         wfProfileOut( __METHOD__ . '-checks' );
1387                         wfProfileOut( __METHOD__ );
1388                         return $status;
1389                 }
1390
1391                 # Check image redirect
1392                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1393                         $textbox_content->isRedirect() &&
1394                         !$wgUser->isAllowed( 'upload' ) ) {
1395                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1396                                 $status->setResult( false, $code );
1397
1398                                 wfProfileOut( __METHOD__ . '-checks' );
1399                                 wfProfileOut( __METHOD__ );
1400
1401                                 return $status;
1402                 }
1403
1404                 # Check for spam
1405                 $match = self::matchSummarySpamRegex( $this->summary );
1406                 if ( $match === false && $this->section == 'new' ) {
1407                         if ( $this->sectiontitle !== '' ) {
1408                                 $match = self::matchSpamRegex( $this->sectiontitle );
1409                         } else {
1410                                 $match = self::matchSpamRegex( $this->summary );
1411                         }
1412                 }
1413                 if ( $match === false ) {
1414                         $match = self::matchSpamRegex( $this->textbox1 );
1415                 }
1416                 if ( $match !== false ) {
1417                         $result['spam'] = $match;
1418                         $ip = $wgRequest->getIP();
1419                         $pdbk = $this->mTitle->getPrefixedDBkey();
1420                         $match = str_replace( "\n", '', $match );
1421                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1422                         $status->fatal( 'spamprotectionmatch', $match );
1423                         $status->value = self::AS_SPAM_ERROR;
1424                         wfProfileOut( __METHOD__ . '-checks' );
1425                         wfProfileOut( __METHOD__ );
1426                         return $status;
1427                 }
1428                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1429                         # Error messages etc. could be handled within the hook...
1430                         $status->fatal( 'hookaborted' );
1431                         $status->value = self::AS_HOOK_ERROR;
1432                         wfProfileOut( __METHOD__ . '-checks' );
1433                         wfProfileOut( __METHOD__ );
1434                         return $status;
1435                 } elseif ( $this->hookError != '' ) {
1436                         # ...or the hook could be expecting us to produce an error
1437                         $status->fatal( 'hookaborted' );
1438                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1439                         wfProfileOut( __METHOD__ . '-checks' );
1440                         wfProfileOut( __METHOD__ );
1441                         return $status;
1442                 }
1443
1444                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1445                         // Auto-block user's IP if the account was "hard" blocked
1446                         $wgUser->spreadAnyEditBlock();
1447                         # Check block state against master, thus 'false'.
1448                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1449                         wfProfileOut( __METHOD__ . '-checks' );
1450                         wfProfileOut( __METHOD__ );
1451                         return $status;
1452                 }
1453
1454                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1455                 if ( $this->kblength > $wgMaxArticleSize ) {
1456                         // Error will be displayed by showEditForm()
1457                         $this->tooBig = true;
1458                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1459                         wfProfileOut( __METHOD__ . '-checks' );
1460                         wfProfileOut( __METHOD__ );
1461                         return $status;
1462                 }
1463
1464                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1465                         if ( $wgUser->isAnon() ) {
1466                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1467                                 wfProfileOut( __METHOD__ . '-checks' );
1468                                 wfProfileOut( __METHOD__ );
1469                                 return $status;
1470                         } else {
1471                                 $status->fatal( 'readonlytext' );
1472                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1473                                 wfProfileOut( __METHOD__ . '-checks' );
1474                                 wfProfileOut( __METHOD__ );
1475                                 return $status;
1476                         }
1477                 }
1478
1479                 if ( wfReadOnly() ) {
1480                         $status->fatal( 'readonlytext' );
1481                         $status->value = self::AS_READ_ONLY_PAGE;
1482                         wfProfileOut( __METHOD__ . '-checks' );
1483                         wfProfileOut( __METHOD__ );
1484                         return $status;
1485                 }
1486                 if ( $wgUser->pingLimiter() ) {
1487                         $status->fatal( 'actionthrottledtext' );
1488                         $status->value = self::AS_RATE_LIMITED;
1489                         wfProfileOut( __METHOD__ . '-checks' );
1490                         wfProfileOut( __METHOD__ );
1491                         return $status;
1492                 }
1493
1494                 # If the article has been deleted while editing, don't save it without
1495                 # confirmation
1496                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1497                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1498                         wfProfileOut( __METHOD__ . '-checks' );
1499                         wfProfileOut( __METHOD__ );
1500                         return $status;
1501                 }
1502
1503                 wfProfileOut( __METHOD__ . '-checks' );
1504
1505                 # Load the page data from the master. If anything changes in the meantime,
1506                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1507                 $this->mArticle->loadPageData( 'fromdbmaster' );
1508                 $new = !$this->mArticle->exists();
1509
1510                 if ( $new ) {
1511                         // Late check for create permission, just in case *PARANOIA*
1512                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1513                                 $status->fatal( 'nocreatetext' );
1514                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1515                                 wfDebug( __METHOD__ . ": no create permission\n" );
1516                                 wfProfileOut( __METHOD__ );
1517                                 return $status;
1518                         }
1519
1520                         // Don't save a new page if it's blank or if it's a MediaWiki:
1521                         // message with content equivalent to default (allow empty pages
1522                         // in this case to disable messages, see bug 50124)
1523                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1524                         if( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1525                                 $defaultText = $defaultMessageText;
1526                         } else {
1527                                 $defaultText = '';
1528                         }
1529
1530                         if ( $this->textbox1 === $defaultText ) {
1531                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1532                                 wfProfileOut( __METHOD__ );
1533                                 return $status;
1534                         }
1535
1536                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1537                                 wfProfileOut( __METHOD__ );
1538                                 return $status;
1539                         }
1540
1541                         $content = $textbox_content;
1542
1543                         $result['sectionanchor'] = '';
1544                         if ( $this->section == 'new' ) {
1545                                 if ( $this->sectiontitle !== '' ) {
1546                                         // Insert the section title above the content.
1547                                         $content = $content->addSectionHeader( $this->sectiontitle );
1548
1549                                         // Jump to the new section
1550                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1551
1552                                         // If no edit summary was specified, create one automatically from the section
1553                                         // title and have it link to the new section. Otherwise, respect the summary as
1554                                         // passed.
1555                                         if ( $this->summary === '' ) {
1556                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1557                                                 $this->summary = wfMessage( 'newsectionsummary' )
1558                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1559                                         }
1560                                 } elseif ( $this->summary !== '' ) {
1561                                         // Insert the section title above the content.
1562                                         $content = $content->addSectionHeader( $this->summary );
1563
1564                                         // Jump to the new section
1565                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1566
1567                                         // Create a link to the new section from the edit summary.
1568                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1569                                         $this->summary = wfMessage( 'newsectionsummary' )
1570                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1571                                 }
1572                         }
1573
1574                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1575
1576                 } else { # not $new
1577
1578                         # Article exists. Check for edit conflict.
1579
1580                         $this->mArticle->clear(); # Force reload of dates, etc.
1581                         $timestamp = $this->mArticle->getTimestamp();
1582
1583                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1584
1585                         if ( $timestamp != $this->edittime ) {
1586                                 $this->isConflict = true;
1587                                 if ( $this->section == 'new' ) {
1588                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1589                                                 $this->mArticle->getComment() == $this->summary ) {
1590                                                 // Probably a duplicate submission of a new comment.
1591                                                 // This can happen when squid resends a request after
1592                                                 // a timeout but the first one actually went through.
1593                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1594                                         } else {
1595                                                 // New comment; suppress conflict.
1596                                                 $this->isConflict = false;
1597                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1598                                         }
1599                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1600                                                         $wgUser->getId(), $this->edittime ) ) {
1601                                         # Suppress edit conflict with self, except for section edits where merging is required.
1602                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1603                                         $this->isConflict = false;
1604                                 }
1605                         }
1606
1607                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1608                         // backwards compatibility with old forms/bots).
1609                         if ( $this->sectiontitle !== '' ) {
1610                                 $sectionTitle = $this->sectiontitle;
1611                         } else {
1612                                 $sectionTitle = $this->summary;
1613                         }
1614
1615                         $content = null;
1616
1617                         if ( $this->isConflict ) {
1618                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1619                                                 . " (article time '{$timestamp}')\n" );
1620
1621                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1622                         } else {
1623                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1624                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1625                         }
1626
1627                         if ( is_null( $content ) ) {
1628                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1629                                 $this->isConflict = true;
1630                                 $content = $textbox_content; // do not try to merge here!
1631                         } elseif ( $this->isConflict ) {
1632                                 # Attempt merge
1633                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1634                                         // Successful merge! Maybe we should tell the user the good news?
1635                                         $this->isConflict = false;
1636                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1637                                 } else {
1638                                         $this->section = '';
1639                                         $this->textbox1 = ContentHandler::getContentText( $content );
1640                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1641                                 }
1642                         }
1643
1644                         if ( $this->isConflict ) {
1645                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1646                                 wfProfileOut( __METHOD__ );
1647                                 return $status;
1648                         }
1649
1650                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1651                                 wfProfileOut( __METHOD__ );
1652                                 return $status;
1653                         }
1654
1655                         if ( $this->section == 'new' ) {
1656                                 // Handle the user preference to force summaries here
1657                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1658                                         $this->missingSummary = true;
1659                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1660                                         $status->value = self::AS_SUMMARY_NEEDED;
1661                                         wfProfileOut( __METHOD__ );
1662                                         return $status;
1663                                 }
1664
1665                                 // Do not allow the user to post an empty comment
1666                                 if ( $this->textbox1 == '' ) {
1667                                         $this->missingComment = true;
1668                                         $status->fatal( 'missingcommenttext' );
1669                                         $status->value = self::AS_TEXTBOX_EMPTY;
1670                                         wfProfileOut( __METHOD__ );
1671                                         return $status;
1672                                 }
1673                         } elseif ( !$this->allowBlankSummary
1674                                 && !$content->equals( $this->getOriginalContent() )
1675                                 && !$content->isRedirect()
1676                                 && md5( $this->summary ) == $this->autoSumm
1677                         ) {
1678                                 $this->missingSummary = true;
1679                                 $status->fatal( 'missingsummary' );
1680                                 $status->value = self::AS_SUMMARY_NEEDED;
1681                                 wfProfileOut( __METHOD__ );
1682                                 return $status;
1683                         }
1684
1685                         # All's well
1686                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1687                         $sectionanchor = '';
1688                         if ( $this->section == 'new' ) {
1689                                 if ( $this->sectiontitle !== '' ) {
1690                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1691                                         // If no edit summary was specified, create one automatically from the section
1692                                         // title and have it link to the new section. Otherwise, respect the summary as
1693                                         // passed.
1694                                         if ( $this->summary === '' ) {
1695                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1696                                                 $this->summary = wfMessage( 'newsectionsummary' )
1697                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1698                                         }
1699                                 } elseif ( $this->summary !== '' ) {
1700                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1701                                         # This is a new section, so create a link to the new section
1702                                         # in the revision summary.
1703                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1704                                         $this->summary = wfMessage( 'newsectionsummary' )
1705                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1706                                 }
1707                         } elseif ( $this->section != '' ) {
1708                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1709                                 # XXX: might be better to integrate this into Article::replaceSection
1710                                 # for duplicate heading checking and maybe parsing
1711                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1712                                 # we can't deal with anchors, includes, html etc in the header for now,
1713                                 # headline would need to be parsed to improve this
1714                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1715                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1716                                 }
1717                         }
1718                         $result['sectionanchor'] = $sectionanchor;
1719                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1720
1721                         // Save errors may fall down to the edit form, but we've now
1722                         // merged the section into full text. Clear the section field
1723                         // so that later submission of conflict forms won't try to
1724                         // replace that into a duplicated mess.
1725                         $this->textbox1 = $this->toEditText( $content );
1726                         $this->section = '';
1727
1728                         $status->value = self::AS_SUCCESS_UPDATE;
1729                 }
1730
1731                 // Check for length errors again now that the section is merged in
1732                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1733                 if ( $this->kblength > $wgMaxArticleSize ) {
1734                         $this->tooBig = true;
1735                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1736                         wfProfileOut( __METHOD__ );
1737                         return $status;
1738                 }
1739
1740                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1741                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1742                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1743                         ( $bot ? EDIT_FORCE_BOT : 0 );
1744
1745                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1746                                                                                                                         false, null, $this->contentFormat );
1747
1748                 if ( !$doEditStatus->isOK() ) {
1749                         // Failure from doEdit()
1750                         // Show the edit conflict page for certain recognized errors from doEdit(),
1751                         // but don't show it for errors from extension hooks
1752                         $errors = $doEditStatus->getErrorsArray();
1753                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1754                                 'edit-already-exists' ) ) )
1755                         {
1756                                 $this->isConflict = true;
1757                                 // Destroys data doEdit() put in $status->value but who cares
1758                                 $doEditStatus->value = self::AS_END;
1759                         }
1760                         wfProfileOut( __METHOD__ );
1761                         return $doEditStatus;
1762                 }
1763
1764                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1765                 $result['redirect'] = $content->isRedirect();
1766                 $this->updateWatchlist();
1767                 wfProfileOut( __METHOD__ );
1768                 return $status;
1769         }
1770
1771         /**
1772          * Register the change of watch status
1773          */
1774         protected function updateWatchlist() {
1775                 global $wgUser;
1776
1777                 if ( $wgUser->isLoggedIn()
1778                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1779                 ) {
1780                         $fname = __METHOD__;
1781                         $title = $this->mTitle;
1782                         $watch = $this->watchthis;
1783
1784                         // Do this in its own transaction to reduce contention...
1785                         $dbw = wfGetDB( DB_MASTER );
1786                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1787                                 $dbw->begin( $fname );
1788                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1789                                 $dbw->commit( $fname );
1790                         } );
1791                 }
1792         }
1793
1794         /**
1795          * Attempts to merge text content with base and current revisions
1796          *
1797          * @param $editText string
1798          *
1799          * @return bool
1800          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1801          */
1802         function mergeChangesInto( &$editText ) {
1803                 ContentHandler::deprecated( __METHOD__, "1.21" );
1804
1805                 $editContent = $this->toEditContent( $editText );
1806
1807                 $ok = $this->mergeChangesIntoContent( $editContent );
1808
1809                 if ( $ok ) {
1810                         $editText = $this->toEditText( $editContent );
1811                         return true;
1812                 }
1813                 return false;
1814         }
1815
1816         /**
1817          * Attempts to do 3-way merge of edit content with a base revision
1818          * and current content, in case of edit conflict, in whichever way appropriate
1819          * for the content type.
1820          *
1821          * @since 1.21
1822          *
1823          * @param $editContent
1824          *
1825          * @return bool
1826          */
1827         private function mergeChangesIntoContent( &$editContent ) {
1828                 wfProfileIn( __METHOD__ );
1829
1830                 $db = wfGetDB( DB_MASTER );
1831
1832                 // This is the revision the editor started from
1833                 $baseRevision = $this->getBaseRevision();
1834                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1835
1836                 if ( is_null( $baseContent ) ) {
1837                         wfProfileOut( __METHOD__ );
1838                         return false;
1839                 }
1840
1841                 // The current state, we want to merge updates into it
1842                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1843                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1844
1845                 if ( is_null( $currentContent ) ) {
1846                         wfProfileOut( __METHOD__ );
1847                         return false;
1848                 }
1849
1850                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1851
1852                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1853
1854                 if ( $result ) {
1855                         $editContent = $result;
1856                         wfProfileOut( __METHOD__ );
1857                         return true;
1858                 }
1859
1860                 wfProfileOut( __METHOD__ );
1861                 return false;
1862         }
1863
1864         /**
1865          * @return Revision
1866          */
1867         function getBaseRevision() {
1868                 if ( !$this->mBaseRevision ) {
1869                         $db = wfGetDB( DB_MASTER );
1870                         $baseRevision = Revision::loadFromTimestamp(
1871                                 $db, $this->mTitle, $this->edittime );
1872                         return $this->mBaseRevision = $baseRevision;
1873                 } else {
1874                         return $this->mBaseRevision;
1875                 }
1876         }
1877
1878         /**
1879          * Check given input text against $wgSpamRegex, and return the text of the first match.
1880          *
1881          * @param $text string
1882          *
1883          * @return string|bool matching string or false
1884          */
1885         public static function matchSpamRegex( $text ) {
1886                 global $wgSpamRegex;
1887                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1888                 $regexes = (array)$wgSpamRegex;
1889                 return self::matchSpamRegexInternal( $text, $regexes );
1890         }
1891
1892         /**
1893          * Check given input text against $wgSpamRegex, and return the text of the first match.
1894          *
1895          * @param $text string
1896          *
1897          * @return string|bool  matching string or false
1898          */
1899         public static function matchSummarySpamRegex( $text ) {
1900                 global $wgSummarySpamRegex;
1901                 $regexes = (array)$wgSummarySpamRegex;
1902                 return self::matchSpamRegexInternal( $text, $regexes );
1903         }
1904
1905         /**
1906          * @param $text string
1907          * @param $regexes array
1908          * @return bool|string
1909          */
1910         protected static function matchSpamRegexInternal( $text, $regexes ) {
1911                 foreach ( $regexes as $regex ) {
1912                         $matches = array();
1913                         if ( preg_match( $regex, $text, $matches ) ) {
1914                                 return $matches[0];
1915                         }
1916                 }
1917                 return false;
1918         }
1919
1920         function setHeaders() {
1921                 global $wgOut, $wgUser;
1922
1923                 $wgOut->addModules( 'mediawiki.action.edit' );
1924                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
1925
1926                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1927                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1928                 }
1929
1930                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
1931                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
1932                 }
1933
1934                 // Bug #19334: textarea jumps when editing articles in IE8
1935                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1936
1937                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1938
1939                 # Enabled article-related sidebar, toplinks, etc.
1940                 $wgOut->setArticleRelated( true );
1941
1942                 $contextTitle = $this->getContextTitle();
1943                 if ( $this->isConflict ) {
1944                         $msg = 'editconflict';
1945                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1946                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1947                 } else {
1948                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1949                                 'editing' : 'creating';
1950                 }
1951                 # Use the title defined by DISPLAYTITLE magic word when present
1952                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1953                 if ( $displayTitle === false ) {
1954                         $displayTitle = $contextTitle->getPrefixedText();
1955                 }
1956                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1957         }
1958
1959         /**
1960          * Show all applicable editing introductions
1961          */
1962         protected function showIntro() {
1963                 global $wgOut, $wgUser;
1964                 if ( $this->suppressIntro ) {
1965                         return;
1966                 }
1967
1968                 $namespace = $this->mTitle->getNamespace();
1969
1970                 if ( $namespace == NS_MEDIAWIKI ) {
1971                         # Show a warning if editing an interface message
1972                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1973                 } elseif ( $namespace == NS_FILE ) {
1974                         # Show a hint to shared repo
1975                         $file = wfFindFile( $this->mTitle );
1976                         if ( $file && !$file->isLocal() ) {
1977                                 $descUrl = $file->getDescriptionUrl();
1978                                 # there must be a description url to show a hint to shared repo
1979                                 if ( $descUrl ) {
1980                                         if ( !$this->mTitle->exists() ) {
1981                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
1982                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1983                                                 ) );
1984                                         } else {
1985                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1986                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1987                                                 ) );
1988                                         }
1989                                 }
1990                         }
1991                 }
1992
1993                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1994                 # Show log extract when the user is currently blocked
1995                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1996                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1997                         $username = $parts[0];
1998                         $user = User::newFromName( $username, false /* allow IP users*/ );
1999                         $ip = User::isIP( $username );
2000                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2001                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2002                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2003                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
2004                                 LogEventsList::showLogExtract(
2005                                         $wgOut,
2006                                         'block',
2007                                         $user->getUserPage(),
2008                                         '',
2009                                         array(
2010                                                 'lim' => 1,
2011                                                 'showIfEmpty' => false,
2012                                                 'msgKey' => array(
2013                                                         'blocked-notice-logextract',
2014                                                         $user->getName() # Support GENDER in notice
2015                                                 )
2016                                         )
2017                                 );
2018                         }
2019                 }
2020                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2021                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2022                         if ( $wgUser->isLoggedIn() ) {
2023                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
2024                         } else {
2025                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
2026                         }
2027                 }
2028                 # Give a notice if the user is editing a deleted/moved page...
2029                 if ( !$this->mTitle->exists() ) {
2030                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2031                                 '',
2032                                 array(
2033                                         'lim' => 10,
2034                                         'conds' => array( "log_action != 'revision'" ),
2035                                         'showIfEmpty' => false,
2036                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2037                                 )
2038                         );
2039                 }
2040         }
2041
2042         /**
2043          * Attempt to show a custom editing introduction, if supplied
2044          *
2045          * @return bool
2046          */
2047         protected function showCustomIntro() {
2048                 if ( $this->editintro ) {
2049                         $title = Title::newFromText( $this->editintro );
2050                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2051                                 global $wgOut;
2052                                 // Added using template syntax, to take <noinclude>'s into account.
2053                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2054                                 return true;
2055                         }
2056                 }
2057                 return false;
2058         }
2059
2060         /**
2061          * Gets an editable textual representation of $content.
2062          * The textual representation can be turned by into a Content object by the
2063          * toEditContent() method.
2064          *
2065          * If $content is null or false or a string, $content is returned unchanged.
2066          *
2067          * If the given Content object is not of a type that can be edited using the text base EditPage,
2068          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2069          * content.
2070          *
2071          * @param Content|null|bool|string $content
2072          * @return String the editable text form of the content.
2073          *
2074          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
2075          */
2076         protected function toEditText( $content ) {
2077                 if ( $content === null || $content === false ) {
2078                         return $content;
2079                 }
2080
2081                 if ( is_string( $content ) ) {
2082                         return $content;
2083                 }
2084
2085                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2086                         throw new MWException( "This content model can not be edited as text: "
2087                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2088                 }
2089
2090                 return $content->serialize( $this->contentFormat );
2091         }
2092
2093         /**
2094          * Turns the given text into a Content object by unserializing it.
2095          *
2096          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2097          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2098          * content.
2099          *
2100          * @param string|null|bool $text Text to unserialize
2101          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2102          *                 returned instead.
2103          *
2104          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2105          *          and $this->allowNonTextContent is not true.
2106          */
2107         protected function toEditContent( $text ) {
2108                 if ( $text === false || $text === null ) {
2109                         return $text;
2110                 }
2111
2112                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2113                         $this->contentModel, $this->contentFormat );
2114
2115                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2116                         throw new MWException( "This content model can not be edited as text: "
2117                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2118                 }
2119
2120                 return $content;
2121         }
2122
2123         /**
2124          * Send the edit form and related headers to $wgOut
2125          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2126          *     during form output near the top, for captchas and the like.
2127          */
2128         function showEditForm( $formCallback = null ) {
2129                 global $wgOut, $wgUser;
2130
2131                 wfProfileIn( __METHOD__ );
2132
2133                 # need to parse the preview early so that we know which templates are used,
2134                 # otherwise users with "show preview after edit box" will get a blank list
2135                 # we parse this near the beginning so that setHeaders can do the title
2136                 # setting work instead of leaving it in getPreviewText
2137                 $previewOutput = '';
2138                 if ( $this->formtype == 'preview' ) {
2139                         $previewOutput = $this->getPreviewText();
2140                 }
2141
2142                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2143
2144                 $this->setHeaders();
2145
2146                 if ( $this->showHeader() === false ) {
2147                         wfProfileOut( __METHOD__ );
2148                         return;
2149                 }
2150
2151                 $wgOut->addHTML( $this->editFormPageTop );
2152
2153                 if ( $wgUser->getOption( 'previewontop' ) ) {
2154                         $this->displayPreviewArea( $previewOutput, true );
2155                 }
2156
2157                 $wgOut->addHTML( $this->editFormTextTop );
2158
2159                 $showToolbar = true;
2160                 if ( $this->wasDeletedSinceLastEdit() ) {
2161                         if ( $this->formtype == 'save' ) {
2162                                 // Hide the toolbar and edit area, user can click preview to get it back
2163                                 // Add an confirmation checkbox and explanation.
2164                                 $showToolbar = false;
2165                         } else {
2166                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2167                                         'deletedwhileediting' );
2168                         }
2169                 }
2170
2171                 // @todo add EditForm plugin interface and use it here!
2172                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2173                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2174                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2175                         'enctype' => 'multipart/form-data' ) ) );
2176
2177                 if ( is_callable( $formCallback ) ) {
2178                         call_user_func_array( $formCallback, array( &$wgOut ) );
2179                 }
2180
2181                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2182
2183                 // Put these up at the top to ensure they aren't lost on early form submission
2184                 $this->showFormBeforeText();
2185
2186                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2187                         $username = $this->lastDelete->user_name;
2188                         $comment = $this->lastDelete->log_comment;
2189
2190                         // It is better to not parse the comment at all than to have templates expanded in the middle
2191                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2192                         $key = $comment === ''
2193                                 ? 'confirmrecreate-noreason'
2194                                 : 'confirmrecreate';
2195                         $wgOut->addHTML(
2196                                 '<div class="mw-confirm-recreate">' .
2197                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2198                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2199                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2200                                 ) .
2201                                 '</div>'
2202                         );
2203                 }
2204
2205                 # When the summary is hidden, also hide them on preview/show changes
2206                 if ( $this->nosummary ) {
2207                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2208                 }
2209
2210                 # If a blank edit summary was previously provided, and the appropriate
2211                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2212                 # user being bounced back more than once in the event that a summary
2213                 # is not required.
2214                 #####
2215                 # For a bit more sophisticated detection of blank summaries, hash the
2216                 # automatic one and pass that in the hidden field wpAutoSummary.
2217                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2218                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2219                 }
2220
2221                 if ( $this->undidRev ) {
2222                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2223                 }
2224
2225                 if ( $this->hasPresetSummary ) {
2226                         // If a summary has been preset using &summary= we don't want to prompt for
2227                         // a different summary. Only prompt for a summary if the summary is blanked.
2228                         // (Bug 17416)
2229                         $this->autoSumm = md5( '' );
2230                 }
2231
2232                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2233                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2234
2235                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2236
2237                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2238                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2239
2240                 if ( $this->section == 'new' ) {
2241                         $this->showSummaryInput( true, $this->summary );
2242                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2243                 }
2244
2245                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2246
2247                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2248                         $wgOut->addHTML( EditPage::getEditToolbar() );
2249                 }
2250
2251                 if ( $this->isConflict ) {
2252                         // In an edit conflict bypass the overridable content form method
2253                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2254                         // resolved between page source edits and custom ui edits using the
2255                         // custom edit ui.
2256                         $this->textbox2 = $this->textbox1;
2257
2258                         $content = $this->getCurrentContent();
2259                         $this->textbox1 = $this->toEditText( $content );
2260
2261                         $this->showTextbox1();
2262                 } else {
2263                         $this->showContentForm();
2264                 }
2265
2266                 $wgOut->addHTML( $this->editFormTextAfterContent );
2267
2268                 $this->showStandardInputs();
2269
2270                 $this->showFormAfterText();
2271
2272                 $this->showTosSummary();
2273
2274                 $this->showEditTools();
2275
2276                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2277
2278                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2279                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2280
2281                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2282                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2283
2284                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2285                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2286
2287                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2288
2289                 if ( $this->isConflict ) {
2290                         try {
2291                                 $this->showConflict();
2292                         } catch ( MWContentSerializationException $ex ) {
2293                                 // this can't really happen, but be nice if it does.
2294                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2295                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2296                         }
2297                 }
2298
2299                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2300
2301                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2302                         $this->displayPreviewArea( $previewOutput, false );
2303                 }
2304
2305                 wfProfileOut( __METHOD__ );
2306         }
2307
2308         /**
2309          * Extract the section title from current section text, if any.
2310          *
2311          * @param string $text
2312          * @return Mixed|string or false
2313          */
2314         public static function extractSectionTitle( $text ) {
2315                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2316                 if ( !empty( $matches[2] ) ) {
2317                         global $wgParser;
2318                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2319                 } else {
2320                         return false;
2321                 }
2322         }
2323
2324         protected function showHeader() {
2325                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2326
2327                 if ( $this->mTitle->isTalkPage() ) {
2328                         $wgOut->addWikiMsg( 'talkpagetext' );
2329                 }
2330
2331                 // Add edit notices
2332                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2333
2334                 if ( $this->isConflict ) {
2335                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2336                         $this->edittime = $this->mArticle->getTimestamp();
2337                 } else {
2338                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2339                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2340                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2341                                 // Someone is welcome to try refactoring though
2342                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2343                                 return false;
2344                         }
2345
2346                         if ( $this->section != '' && $this->section != 'new' ) {
2347                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2348                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2349                                         if ( $sectionTitle !== false ) {
2350                                                 $this->summary = "/* $sectionTitle */ ";
2351                                         }
2352                                 }
2353                         }
2354
2355                         if ( $this->missingComment ) {
2356                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2357                         }
2358
2359                         if ( $this->missingSummary && $this->section != 'new' ) {
2360                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2361                         }
2362
2363                         if ( $this->missingSummary && $this->section == 'new' ) {
2364                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2365                         }
2366
2367                         if ( $this->hookError !== '' ) {
2368                                 $wgOut->addWikiText( $this->hookError );
2369                         }
2370
2371                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2372                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2373                         }
2374
2375                         if ( $this->section != 'new' ) {
2376                                 $revision = $this->mArticle->getRevisionFetched();
2377                                 if ( $revision ) {
2378                                         // Let sysop know that this will make private content public if saved
2379
2380                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2381                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2382                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2383                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2384                                         }
2385
2386                                         if ( !$revision->isCurrent() ) {
2387                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2388                                                 $wgOut->addWikiMsg( 'editingold' );
2389                                         }
2390                                 } elseif ( $this->mTitle->exists() ) {
2391                                         // Something went wrong
2392
2393                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2394                                                 array( 'missing-revision', $this->oldid ) );
2395                                 }
2396                         }
2397                 }
2398
2399                 if ( wfReadOnly() ) {
2400                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2401                 } elseif ( $wgUser->isAnon() ) {
2402                         if ( $this->formtype != 'preview' ) {
2403                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2404                         } else {
2405                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2406                         }
2407                 } else {
2408                         if ( $this->isCssJsSubpage ) {
2409                                 # Check the skin exists
2410                                 if ( $this->isWrongCaseCssJsPage ) {
2411                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2412                                 }
2413                                 if ( $this->formtype !== 'preview' ) {
2414                                         if ( $this->isCssSubpage ) {
2415                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2416                                         }
2417
2418                                         if ( $this->isJsSubpage ) {
2419                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2420                                         }
2421                                 }
2422                         }
2423                 }
2424
2425                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2426                         # Is the title semi-protected?
2427                         if ( $this->mTitle->isSemiProtected() ) {
2428                                 $noticeMsg = 'semiprotectedpagewarning';
2429                         } else {
2430                                 # Then it must be protected based on static groups (regular)
2431                                 $noticeMsg = 'protectedpagewarning';
2432                         }
2433                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2434                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2435                 }
2436                 if ( $this->mTitle->isCascadeProtected() ) {
2437                         # Is this page under cascading protection from some source pages?
2438                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2439                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2440                         $cascadeSourcesCount = count( $cascadeSources );
2441                         if ( $cascadeSourcesCount > 0 ) {
2442                                 # Explain, and list the titles responsible
2443                                 foreach ( $cascadeSources as $page ) {
2444                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2445                                 }
2446                         }
2447                         $notice .= '</div>';
2448                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2449                 }
2450                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2451                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2452                                 array( 'lim' => 1,
2453                                         'showIfEmpty' => false,
2454                                         'msgKey' => array( 'titleprotectedwarning' ),
2455                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2456                 }
2457
2458                 if ( $this->kblength === false ) {
2459                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2460                 }
2461
2462                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2463                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2464                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2465                 } else {
2466                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2467                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2468                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2469                                 );
2470                         }
2471                 }
2472                 # Add header copyright warning
2473                 $this->showHeaderCopyrightWarning();
2474         }
2475
2476         /**
2477          * Standard summary input and label (wgSummary), abstracted so EditPage
2478          * subclasses may reorganize the form.
2479          * Note that you do not need to worry about the label's for=, it will be
2480          * inferred by the id given to the input. You can remove them both by
2481          * passing array( 'id' => false ) to $userInputAttrs.
2482          *
2483          * @param string $summary The value of the summary input
2484          * @param string $labelText The html to place inside the label
2485          * @param array $inputAttrs of attrs to use on the input
2486          * @param array $spanLabelAttrs of attrs to use on the span inside the label
2487          *
2488          * @return array An array in the format array( $label, $input )
2489          */
2490         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2491                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2492                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2493                         'id' => 'wpSummary',
2494                         'maxlength' => '200',
2495                         'tabindex' => '1',
2496                         'size' => 60,
2497                         'spellcheck' => 'true',
2498                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2499
2500                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2501                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2502                         'id' => "wpSummaryLabel"
2503                 );
2504
2505                 $label = null;
2506                 if ( $labelText ) {
2507                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2508                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2509                 }
2510
2511                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2512
2513                 return array( $label, $input );
2514         }
2515
2516         /**
2517          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2518          *                          up top, or false if this is the comment summary
2519          *                          down below the textarea
2520          * @param string $summary The text of the summary to display
2521          * @return String
2522          */
2523         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2524                 global $wgOut, $wgContLang;
2525                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2526                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2527                 if ( $isSubjectPreview ) {
2528                         if ( $this->nosummary ) {
2529                                 return;
2530                         }
2531                 } else {
2532                         if ( !$this->mShowSummaryField ) {
2533                                 return;
2534                         }
2535                 }
2536                 $summary = $wgContLang->recodeForEdit( $summary );
2537                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2538                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2539                 $wgOut->addHTML( "{$label} {$input}" );
2540         }
2541
2542         /**
2543          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2544          *                          up top, or false if this is the comment summary
2545          *                          down below the textarea
2546          * @param string $summary the text of the summary to display
2547          * @return String
2548          */
2549         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2550                 // avoid spaces in preview, gets always trimmed on save
2551                 $summary = trim( $summary );
2552                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2553                         return "";
2554                 }
2555
2556                 global $wgParser;
2557
2558                 if ( $isSubjectPreview ) {
2559                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2560                                 ->inContentLanguage()->text();
2561                 }
2562
2563                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2564
2565                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2566                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2567         }
2568
2569         protected function showFormBeforeText() {
2570                 global $wgOut;
2571                 $section = htmlspecialchars( $this->section );
2572                 $wgOut->addHTML( <<<HTML
2573 <input type='hidden' value="{$section}" name="wpSection" />
2574 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2575 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2576 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2577
2578 HTML
2579                 );
2580                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2581                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2582                 }
2583         }
2584
2585         protected function showFormAfterText() {
2586                 global $wgOut, $wgUser;
2587                 /**
2588                  * To make it harder for someone to slip a user a page
2589                  * which submits an edit form to the wiki without their
2590                  * knowledge, a random token is associated with the login
2591                  * session. If it's not passed back with the submission,
2592                  * we won't save the page, or render user JavaScript and
2593                  * CSS previews.
2594                  *
2595                  * For anon editors, who may not have a session, we just
2596                  * include the constant suffix to prevent editing from
2597                  * broken text-mangling proxies.
2598                  */
2599                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2600         }
2601
2602         /**
2603          * Subpage overridable method for printing the form for page content editing
2604          * By default this simply outputs wpTextbox1
2605          * Subclasses can override this to provide a custom UI for editing;
2606          * be it a form, or simply wpTextbox1 with a modified content that will be
2607          * reverse modified when extracted from the post data.
2608          * Note that this is basically the inverse for importContentFormData
2609          */
2610         protected function showContentForm() {
2611                 $this->showTextbox1();
2612         }
2613
2614         /**
2615          * Method to output wpTextbox1
2616          * The $textoverride method can be used by subclasses overriding showContentForm
2617          * to pass back to this method.
2618          *
2619          * @param array $customAttribs of html attributes to use in the textarea
2620          * @param string $textoverride optional text to override $this->textarea1 with
2621          */
2622         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2623                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2624                         $attribs = array( 'style' => 'display:none;' );
2625                 } else {
2626                         $classes = array(); // Textarea CSS
2627                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2628                                 # Is the title semi-protected?
2629                                 if ( $this->mTitle->isSemiProtected() ) {
2630                                         $classes[] = 'mw-textarea-sprotected';
2631                                 } else {
2632                                         # Then it must be protected based on static groups (regular)
2633                                         $classes[] = 'mw-textarea-protected';
2634                                 }
2635                                 # Is the title cascade-protected?
2636                                 if ( $this->mTitle->isCascadeProtected() ) {
2637                                         $classes[] = 'mw-textarea-cprotected';
2638                                 }
2639                         }
2640
2641                         $attribs = array( 'tabindex' => 1 );
2642
2643                         if ( is_array( $customAttribs ) ) {
2644                                 $attribs += $customAttribs;
2645                         }
2646
2647                         if ( count( $classes ) ) {
2648                                 if ( isset( $attribs['class'] ) ) {
2649                                         $classes[] = $attribs['class'];
2650                                 }
2651                                 $attribs['class'] = implode( ' ', $classes );
2652                         }
2653                 }
2654
2655                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2656         }
2657
2658         protected function showTextbox2() {
2659                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2660         }
2661
2662         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2663                 global $wgOut, $wgUser;
2664
2665                 $wikitext = $this->safeUnicodeOutput( $text );
2666                 if ( strval( $wikitext ) !== '' ) {
2667                         // Ensure there's a newline at the end, otherwise adding lines
2668                         // is awkward.
2669                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2670                         // mode will show an extra newline. A bit annoying.
2671                         $wikitext .= "\n";
2672                 }
2673
2674                 $attribs = $customAttribs + array(
2675                         'accesskey' => ',',
2676                         'id' => $name,
2677                         'cols' => $wgUser->getIntOption( 'cols' ),
2678                         'rows' => $wgUser->getIntOption( 'rows' ),
2679                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2680                 );
2681
2682                 $pageLang = $this->mTitle->getPageLanguage();
2683                 $attribs['lang'] = $pageLang->getCode();
2684                 $attribs['dir'] = $pageLang->getDir();
2685
2686                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2687         }
2688
2689         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2690                 global $wgOut;
2691                 $classes = array();
2692                 if ( $isOnTop ) {
2693                         $classes[] = 'ontop';
2694                 }
2695
2696                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2697
2698                 if ( $this->formtype != 'preview' ) {
2699                         $attribs['style'] = 'display: none;';
2700                 }
2701
2702                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2703
2704                 if ( $this->formtype == 'preview' ) {
2705                         $this->showPreview( $previewOutput );
2706                 }
2707
2708                 $wgOut->addHTML( '</div>' );
2709
2710                 if ( $this->formtype == 'diff' ) {
2711                         try {
2712                                 $this->showDiff();
2713                         } catch ( MWContentSerializationException $ex ) {
2714                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2715                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2716                         }
2717                 }
2718         }
2719
2720         /**
2721          * Append preview output to $wgOut.
2722          * Includes category rendering if this is a category page.
2723          *
2724          * @param string $text the HTML to be output for the preview.
2725          */
2726         protected function showPreview( $text ) {
2727                 global $wgOut;
2728                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2729                         $this->mArticle->openShowCategory();
2730                 }
2731                 # This hook seems slightly odd here, but makes things more
2732                 # consistent for extensions.
2733                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2734                 $wgOut->addHTML( $text );
2735                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2736                         $this->mArticle->closeShowCategory();
2737                 }
2738         }
2739
2740         /**
2741          * Get a diff between the current contents of the edit box and the
2742          * version of the page we're editing from.
2743          *
2744          * If this is a section edit, we'll replace the section as for final
2745          * save and then make a comparison.
2746          */
2747         function showDiff() {
2748                 global $wgUser, $wgContLang, $wgOut;
2749
2750                 $oldtitlemsg = 'currentrev';
2751                 # if message does not exist, show diff against the preloaded default
2752                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2753                         $oldtext = $this->mTitle->getDefaultMessageText();
2754                         if ( $oldtext !== false ) {
2755                                 $oldtitlemsg = 'defaultmessagetext';
2756                                 $oldContent = $this->toEditContent( $oldtext );
2757                         } else {
2758                                 $oldContent = null;
2759                         }
2760                 } else {
2761                         $oldContent = $this->getCurrentContent();
2762                 }
2763
2764                 $textboxContent = $this->toEditContent( $this->textbox1 );
2765
2766                 $newContent = $this->mArticle->replaceSectionContent(
2767                                                         $this->section, $textboxContent,
2768                                                         $this->summary, $this->edittime );
2769
2770                 if ( $newContent ) {
2771                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2772                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2773
2774                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2775                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2776                 }
2777
2778                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2779                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2780                         $newtitle = wfMessage( 'yourtext' )->parse();
2781
2782                         if ( !$oldContent ) {
2783                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2784                         }
2785
2786                         if ( !$newContent ) {
2787                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2788                         }
2789
2790                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2791                         $de->setContent( $oldContent, $newContent );
2792
2793                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2794                         $de->showDiffStyle();
2795                 } else {
2796                         $difftext = '';
2797                 }
2798
2799                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2800         }
2801
2802         /**
2803          * Show the header copyright warning.
2804          */
2805         protected function showHeaderCopyrightWarning() {
2806                 $msg = 'editpage-head-copy-warn';
2807                 if ( !wfMessage( $msg )->isDisabled() ) {
2808                         global $wgOut;
2809                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2810                                 'editpage-head-copy-warn' );
2811                 }
2812         }
2813
2814         /**
2815          * Give a chance for site and per-namespace customizations of
2816          * terms of service summary link that might exist separately
2817          * from the copyright notice.
2818          *
2819          * This will display between the save button and the edit tools,
2820          * so should remain short!
2821          */
2822         protected function showTosSummary() {
2823                 $msg = 'editpage-tos-summary';
2824                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2825                 if ( !wfMessage( $msg )->isDisabled() ) {
2826                         global $wgOut;
2827                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2828                         $wgOut->addWikiMsg( $msg );
2829                         $wgOut->addHTML( '</div>' );
2830                 }
2831         }
2832
2833         protected function showEditTools() {
2834                 global $wgOut;
2835                 $wgOut->addHTML( '<div class="mw-editTools">' .
2836                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2837                         '</div>' );
2838         }
2839
2840         /**
2841          * Get the copyright warning
2842          *
2843          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2844          */
2845         protected function getCopywarn() {
2846                 return self::getCopyrightWarning( $this->mTitle );
2847         }
2848
2849         public static function getCopyrightWarning( $title ) {
2850                 global $wgRightsText;
2851                 if ( $wgRightsText ) {
2852                         $copywarnMsg = array( 'copyrightwarning',
2853                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2854                                 $wgRightsText );
2855                 } else {
2856                         $copywarnMsg = array( 'copyrightwarning2',
2857                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2858                 }
2859                 // Allow for site and per-namespace customization of contribution/copyright notice.
2860                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2861
2862                 return "<div id=\"editpage-copywarn\">\n" .
2863                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2864         }
2865
2866         /**
2867          * Get the Limit report for page previews
2868          *
2869          * @since 1.22
2870          * @param ParserOutput $output ParserOutput object from the parse
2871          * @return string HTML
2872          */
2873         public static function getPreviewLimitReport( $output ) {
2874                 if ( !$output || !$output->getLimitReportData() ) {
2875                         return '';
2876                 }
2877
2878                 wfProfileIn( __METHOD__ );
2879
2880                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
2881                         wfMessage( 'limitreport-title' )->parseAsBlock()
2882                 );
2883
2884                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
2885                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
2886
2887                 $limitReport .= Html::openElement( 'table', array(
2888                         'class' => 'preview-limit-report wikitable'
2889                 ) ) .
2890                         Html::openElement( 'tbody' );
2891
2892                 foreach ( $output->getLimitReportData() as $key => $value ) {
2893                         if ( wfRunHooks( 'ParserLimitReportFormat',
2894                                 array( $key, $value, &$limitReport, true, true )
2895                         ) ) {
2896                                 $keyMsg = wfMessage( $key );
2897                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
2898                                 if ( !$valueMsg->exists() ) {
2899                                         $valueMsg = new RawMessage( '$1' );
2900                                 }
2901                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
2902                                         $limitReport .= Html::openElement( 'tr' ) .
2903                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
2904                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
2905                                                 Html::closeElement( 'tr' );
2906                                 }
2907                         }
2908                 }
2909
2910                 $limitReport .= Html::closeElement( 'tbody' ) .
2911                         Html::closeElement( 'table' ) .
2912                         Html::closeElement( 'div' );
2913
2914                 wfProfileOut( __METHOD__ );
2915
2916                 return $limitReport;
2917         }
2918
2919         protected function showStandardInputs( &$tabindex = 2 ) {
2920                 global $wgOut;
2921                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2922
2923                 if ( $this->section != 'new' ) {
2924                         $this->showSummaryInput( false, $this->summary );
2925                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2926                 }
2927
2928                 $checkboxes = $this->getCheckboxes( $tabindex,
2929                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2930                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2931
2932                 // Show copyright warning.
2933                 $wgOut->addWikiText( $this->getCopywarn() );
2934                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2935
2936                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2937                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2938
2939                 $cancel = $this->getCancelLink();
2940                 if ( $cancel !== '' ) {
2941                         $cancel .= Html::element( 'span',
2942                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
2943                                 wfMessage( 'pipe-separator' )->text() );
2944                 }
2945                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2946                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2947                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2948                         wfMessage( 'newwindow' )->parse();
2949                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2950                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2951                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
2952                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
2953                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
2954         }
2955
2956         /**
2957          * Show an edit conflict. textbox1 is already shown in showEditForm().
2958          * If you want to use another entry point to this function, be careful.
2959          */
2960         protected function showConflict() {
2961                 global $wgOut;
2962
2963                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2964                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2965
2966                         $content1 = $this->toEditContent( $this->textbox1 );
2967                         $content2 = $this->toEditContent( $this->textbox2 );
2968
2969                         $handler = ContentHandler::getForModelID( $this->contentModel );
2970                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2971                         $de->setContent( $content2, $content1 );
2972                         $de->showDiff(
2973                                 wfMessage( 'yourtext' )->parse(),
2974                                 wfMessage( 'storedversion' )->text()
2975                         );
2976
2977                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2978                         $this->showTextbox2();
2979                 }
2980         }
2981
2982         /**
2983          * @return string
2984          */
2985         public function getCancelLink() {
2986                 $cancelParams = array();
2987                 if ( !$this->isConflict && $this->oldid > 0 ) {
2988                         $cancelParams['oldid'] = $this->oldid;
2989                 }
2990
2991                 return Linker::linkKnown(
2992                         $this->getContextTitle(),
2993                         wfMessage( 'cancel' )->parse(),
2994                         array( 'id' => 'mw-editform-cancel' ),
2995                         $cancelParams
2996                 );
2997         }
2998
2999         /**
3000          * Returns the URL to use in the form's action attribute.
3001          * This is used by EditPage subclasses when simply customizing the action
3002          * variable in the constructor is not enough. This can be used when the
3003          * EditPage lives inside of a Special page rather than a custom page action.
3004          *
3005          * @param $title Title object for which is being edited (where we go to for &action= links)
3006          * @return string
3007          */
3008         protected function getActionURL( Title $title ) {
3009                 return $title->getLocalURL( array( 'action' => $this->action ) );
3010         }
3011
3012         /**
3013          * Check if a page was deleted while the user was editing it, before submit.
3014          * Note that we rely on the logging table, which hasn't been always there,
3015          * but that doesn't matter, because this only applies to brand new
3016          * deletes.
3017          */
3018         protected function wasDeletedSinceLastEdit() {
3019                 if ( $this->deletedSinceEdit !== null ) {
3020                         return $this->deletedSinceEdit;
3021                 }
3022
3023                 $this->deletedSinceEdit = false;
3024
3025                 if ( $this->mTitle->isDeletedQuick() ) {
3026                         $this->lastDelete = $this->getLastDelete();
3027                         if ( $this->lastDelete ) {
3028                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3029                                 if ( $deleteTime > $this->starttime ) {
3030                                         $this->deletedSinceEdit = true;
3031                                 }
3032                         }
3033                 }
3034
3035                 return $this->deletedSinceEdit;
3036         }
3037
3038         protected function getLastDelete() {
3039                 $dbr = wfGetDB( DB_SLAVE );
3040                 $data = $dbr->selectRow(
3041                         array( 'logging', 'user' ),
3042                         array(
3043                                 'log_type',
3044                                 'log_action',
3045                                 'log_timestamp',
3046                                 'log_user',
3047                                 'log_namespace',
3048                                 'log_title',
3049                                 'log_comment',
3050                                 'log_params',
3051                                 'log_deleted',
3052                                 'user_name'
3053                         ), array(
3054                                 'log_namespace' => $this->mTitle->getNamespace(),
3055                                 'log_title' => $this->mTitle->getDBkey(),
3056                                 'log_type' => 'delete',
3057                                 'log_action' => 'delete',
3058                                 'user_id=log_user'
3059                         ),
3060                         __METHOD__,
3061                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3062                 );
3063                 // Quick paranoid permission checks...
3064                 if ( is_object( $data ) ) {
3065                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3066                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3067                         }
3068
3069                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3070                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3071                         }
3072                 }
3073                 return $data;
3074         }
3075
3076         /**
3077          * Get the rendered text for previewing.
3078          * @throws MWException
3079          * @return string
3080          */
3081         function getPreviewText() {
3082                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3083
3084                 wfProfileIn( __METHOD__ );
3085
3086                 if ( $wgRawHtml && !$this->mTokenOk ) {
3087                         // Could be an offsite preview attempt. This is very unsafe if
3088                         // HTML is enabled, as it could be an attack.
3089                         $parsedNote = '';
3090                         if ( $this->textbox1 !== '' ) {
3091                                 // Do not put big scary notice, if previewing the empty
3092                                 // string, which happens when you initially edit
3093                                 // a category page, due to automatic preview-on-open.
3094                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3095                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3096                         }
3097                         wfProfileOut( __METHOD__ );
3098                         return $parsedNote;
3099                 }
3100
3101                 $note = '';
3102
3103                 try {
3104                         $content = $this->toEditContent( $this->textbox1 );
3105
3106                         $previewHTML = '';
3107                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
3108                                 wfProfileOut( __METHOD__ );
3109                                 return $previewHTML;
3110                         }
3111
3112                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3113                                 if ( $this->mTokenOkExceptSuffix ) {
3114                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3115
3116                                 } else {
3117                                         $note = wfMessage( 'session_fail_preview' )->plain();
3118                                 }
3119                         } elseif ( $this->incompleteForm ) {
3120                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3121                         } else {
3122                                 $note = wfMessage( 'previewnote' )->plain() .
3123                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
3124                         }
3125
3126                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3127                         $parserOptions->setEditSection( false );
3128                         $parserOptions->setIsPreview( true );
3129                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3130
3131                         # don't parse non-wikitext pages, show message about preview
3132                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3133                                 if ( $this->mTitle->isCssJsSubpage() ) {
3134                                         $level = 'user';
3135                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3136                                         $level = 'site';
3137                                 } else {
3138                                         $level = false;
3139                                 }
3140
3141                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3142                                         $format = 'css';
3143                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3144                                         $format = 'js';
3145                                 } else {
3146                                         $format = false;
3147                                 }
3148
3149                                 # Used messages to make sure grep find them:
3150                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3151                                 if ( $level && $format ) {
3152                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text() . "</div>";
3153                                 }
3154                         }
3155
3156                         $rt = $content->getRedirectChain();
3157                         if ( $rt ) {
3158                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
3159                         } else {
3160
3161                                 # If we're adding a comment, we need to show the
3162                                 # summary as the headline
3163                                 if ( $this->section === "new" && $this->summary !== "" ) {
3164                                         $content = $content->addSectionHeader( $this->summary );
3165                                 }
3166
3167                                 $hook_args = array( $this, &$content );
3168                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3169                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3170
3171                                 $parserOptions->enableLimitReport();
3172
3173                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3174                                 # But it's now deprecated, so never mind
3175
3176                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3177                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3178
3179                                 $previewHTML = $parserOutput->getText();
3180                                 $this->mParserOutput = $parserOutput;
3181                                 $wgOut->addParserOutputNoText( $parserOutput );
3182
3183                                 if ( count( $parserOutput->getWarnings() ) ) {
3184                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3185                                 }
3186                         }
3187                 } catch ( MWContentSerializationException $ex ) {
3188                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3189                         $note .= "\n\n" . $m->parse();
3190                         $previewHTML = '';
3191                 }
3192
3193                 if ( $this->isConflict ) {
3194                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3195                 } else {
3196                         $conflict = '<hr />';
3197                 }
3198
3199                 $previewhead = "<div class='previewnote'>\n" .
3200                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3201                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3202
3203                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3204                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3205                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3206                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3207
3208                 wfProfileOut( __METHOD__ );
3209                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3210         }
3211
3212         /**
3213          * @return Array
3214          */
3215         function getTemplates() {
3216                 if ( $this->preview || $this->section != '' ) {
3217                         $templates = array();
3218                         if ( !isset( $this->mParserOutput ) ) {
3219                                 return $templates;
3220                         }
3221                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3222                                 foreach ( array_keys( $template ) as $dbk ) {
3223                                         $templates[] = Title::makeTitle( $ns, $dbk );
3224                                 }
3225                         }
3226                         return $templates;
3227                 } else {
3228                         return $this->mTitle->getTemplateLinksFrom();
3229                 }
3230         }
3231
3232         /**
3233          * Shows a bulletin board style toolbar for common editing functions.
3234          * It can be disabled in the user preferences.
3235          * The necessary JavaScript code can be found in skins/common/edit.js.
3236          *
3237          * @return string
3238          */
3239         static function getEditToolbar() {
3240                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3241                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3242
3243                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3244
3245                 /**
3246                  * $toolarray is an array of arrays each of which includes the
3247                  * filename of the button image (without path), the opening
3248                  * tag, the closing tag, optionally a sample text that is
3249                  * inserted between the two when no selection is highlighted
3250                  * and.  The tip text is shown when the user moves the mouse
3251                  * over the button.
3252                  *
3253                  * Also here: accesskeys (key), which are not used yet until
3254                  * someone can figure out a way to make them work in
3255                  * IE. However, we should make sure these keys are not defined
3256                  * on the edit page.
3257                  */
3258                 $toolarray = array(
3259                         array(
3260                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3261                                 'id'     => 'mw-editbutton-bold',
3262                                 'open'   => '\'\'\'',
3263                                 'close'  => '\'\'\'',
3264                                 'sample' => wfMessage( 'bold_sample' )->text(),
3265                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3266                                 'key'    => 'B'
3267                         ),
3268                         array(
3269                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3270                                 'id'     => 'mw-editbutton-italic',
3271                                 'open'   => '\'\'',
3272                                 'close'  => '\'\'',
3273                                 'sample' => wfMessage( 'italic_sample' )->text(),
3274                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3275                                 'key'    => 'I'
3276                         ),
3277                         array(
3278                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3279                                 'id'     => 'mw-editbutton-link',
3280                                 'open'   => '[[',
3281                                 'close'  => ']]',
3282                                 'sample' => wfMessage( 'link_sample' )->text(),
3283                                 'tip'    => wfMessage( 'link_tip' )->text(),
3284                                 'key'    => 'L'
3285                         ),
3286                         array(
3287                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3288                                 'id'     => 'mw-editbutton-extlink',
3289                                 'open'   => '[',
3290                                 'close'  => ']',
3291                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3292                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3293                                 'key'    => 'X'
3294                         ),
3295                         array(
3296                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3297                                 'id'     => 'mw-editbutton-headline',
3298                                 'open'   => "\n== ",
3299                                 'close'  => " ==\n",
3300                                 'sample' => wfMessage( 'headline_sample' )->text(),
3301                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3302                                 'key'    => 'H'
3303                         ),
3304                         $imagesAvailable ? array(
3305                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3306                                 'id'     => 'mw-editbutton-image',
3307                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3308                                 'close'  => ']]',
3309                                 'sample' => wfMessage( 'image_sample' )->text(),
3310                                 'tip'    => wfMessage( 'image_tip' )->text(),
3311                                 'key'    => 'D',
3312                         ) : false,
3313                         $imagesAvailable ? array(
3314                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3315                                 'id'     => 'mw-editbutton-media',
3316                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3317                                 'close'  => ']]',
3318                                 'sample' => wfMessage( 'media_sample' )->text(),
3319                                 'tip'    => wfMessage( 'media_tip' )->text(),
3320                                 'key'    => 'M'
3321                         ) : false,
3322                         $wgUseTeX ? array(
3323                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3324                                 'id'     => 'mw-editbutton-math',
3325                                 'open'   => "<math>",
3326                                 'close'  => "</math>",
3327                                 'sample' => wfMessage( 'math_sample' )->text(),
3328                                 'tip'    => wfMessage( 'math_tip' )->text(),
3329                                 'key'    => 'C'
3330                         ) : false,
3331                         array(
3332                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3333                                 'id'     => 'mw-editbutton-nowiki',
3334                                 'open'   => "<nowiki>",
3335                                 'close'  => "</nowiki>",
3336                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3337                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3338                                 'key'    => 'N'
3339                         ),
3340                         array(
3341                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3342                                 'id'     => 'mw-editbutton-signature',
3343                                 'open'   => '--~~~~',
3344                                 'close'  => '',
3345                                 'sample' => '',
3346                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3347                                 'key'    => 'Y'
3348                         ),
3349                         array(
3350                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3351                                 'id'     => 'mw-editbutton-hr',
3352                                 'open'   => "\n----\n",
3353                                 'close'  => '',
3354                                 'sample' => '',
3355                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3356                                 'key'    => 'R'
3357                         )
3358                 );
3359
3360                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3361                 foreach ( $toolarray as $tool ) {
3362                         if ( !$tool ) {
3363                                 continue;
3364                         }
3365
3366                         $params = array(
3367                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3368                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3369                                 // Older browsers show a "speedtip" type message only for ALT.
3370                                 // Ideally these should be different, realistically they
3371                                 // probably don't need to be.
3372                                 $tip = $tool['tip'],
3373                                 $open = $tool['open'],
3374                                 $close = $tool['close'],
3375                                 $sample = $tool['sample'],
3376                                 $cssId = $tool['id'],
3377                         );
3378
3379                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3380                 }
3381
3382                 // This used to be called on DOMReady from mediawiki.action.edit, which
3383                 // ended up causing race conditions with the setup code above.
3384                 $script .= "\n" .
3385                         "// Create button bar\n" .
3386                         "$(function() { mw.toolbar.init(); } );\n";
3387
3388                 $script .= '});';
3389                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3390
3391                 $toolbar = '<div id="toolbar"></div>';
3392
3393                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3394
3395                 return $toolbar;
3396         }
3397
3398         /**
3399          * Returns an array of html code of the following checkboxes:
3400          * minor and watch
3401          *
3402          * @param int $tabindex Current tabindex
3403          * @param array $checked of checkbox => bool, where bool indicates the checked
3404          *                 status of the checkbox
3405          *
3406          * @return array
3407          */
3408         public function getCheckboxes( &$tabindex, $checked ) {
3409                 global $wgUser;
3410
3411                 $checkboxes = array();
3412
3413                 // don't show the minor edit checkbox if it's a new page or section
3414                 if ( !$this->isNew ) {
3415                         $checkboxes['minor'] = '';
3416                         $minorLabel = wfMessage( 'minoredit' )->parse();
3417                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3418                                 $attribs = array(
3419                                         'tabindex' => ++$tabindex,
3420                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3421                                         'id' => 'wpMinoredit',
3422                                 );
3423                                 $checkboxes['minor'] =
3424                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3425                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3426                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3427                                         ">{$minorLabel}</label>";
3428                         }
3429                 }
3430
3431                 $watchLabel = wfMessage( 'watchthis' )->parse();
3432                 $checkboxes['watch'] = '';
3433                 if ( $wgUser->isLoggedIn() ) {
3434                         $attribs = array(
3435                                 'tabindex' => ++$tabindex,
3436                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3437                                 'id' => 'wpWatchthis',
3438                         );
3439                         $checkboxes['watch'] =
3440                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3441                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3442                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3443                                 ">{$watchLabel}</label>";
3444                 }
3445                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3446                 return $checkboxes;
3447         }
3448
3449         /**
3450          * Returns an array of html code of the following buttons:
3451          * save, diff, preview and live
3452          *
3453          * @param int $tabindex Current tabindex
3454          *
3455          * @return array
3456          */
3457         public function getEditButtons( &$tabindex ) {
3458                 $buttons = array();
3459
3460                 $temp = array(
3461                         'id' => 'wpSave',
3462                         'name' => 'wpSave',
3463                         'type' => 'submit',
3464                         'tabindex' => ++$tabindex,
3465                         'value' => wfMessage( 'savearticle' )->text(),
3466                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3467                         'title' => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3468                 );
3469                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3470
3471                 ++$tabindex; // use the same for preview and live preview
3472                 $temp = array(
3473                         'id' => 'wpPreview',
3474                         'name' => 'wpPreview',
3475                         'type' => 'submit',
3476                         'tabindex' => $tabindex,
3477                         'value' => wfMessage( 'showpreview' )->text(),
3478                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3479                         'title' => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3480                 );
3481                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3482                 $buttons['live'] = '';
3483
3484                 $temp = array(
3485                         'id' => 'wpDiff',
3486                         'name' => 'wpDiff',
3487                         'type' => 'submit',
3488                         'tabindex' => ++$tabindex,
3489                         'value' => wfMessage( 'showdiff' )->text(),
3490                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3491                         'title' => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3492                 );
3493                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3494
3495                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3496                 return $buttons;
3497         }
3498
3499         /**
3500          * Output preview text only. This can be sucked into the edit page
3501          * via JavaScript, and saves the server time rendering the skin as
3502          * well as theoretically being more robust on the client (doesn't
3503          * disturb the edit box's undo history, won't eat your text on
3504          * failure, etc).
3505          *
3506          * @todo This doesn't include category or interlanguage links.
3507          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3508          *       or something...</s>" that might also require more skin
3509          *       initialization, so check whether that's a problem.
3510          */
3511         function livePreview() {
3512                 global $wgOut;
3513                 $wgOut->disable();
3514                 header( 'Content-type: text/xml; charset=utf-8' );
3515                 header( 'Cache-control: no-cache' );
3516
3517                 $previewText = $this->getPreviewText();
3518                 #$categories = $skin->getCategoryLinks();
3519
3520                 $s =
3521                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3522                 Xml::tags( 'livepreview', null,
3523                         Xml::element( 'preview', null, $previewText )
3524                         #.      Xml::element( 'category', null, $categories )
3525                 );
3526                 echo $s;
3527         }
3528
3529         /**
3530          * Call the stock "user is blocked" page
3531          *
3532          * @deprecated in 1.19; throw an exception directly instead
3533          */
3534         function blockedPage() {
3535                 wfDeprecated( __METHOD__, '1.19' );
3536                 global $wgUser;
3537
3538                 throw new UserBlockedError( $wgUser->getBlock() );
3539         }
3540
3541         /**
3542          * Produce the stock "please login to edit pages" page
3543          *
3544          * @deprecated in 1.19; throw an exception directly instead
3545          */
3546         function userNotLoggedInPage() {
3547                 wfDeprecated( __METHOD__, '1.19' );
3548                 throw new PermissionsError( 'edit' );
3549         }
3550
3551         /**
3552          * Show an error page saying to the user that he has insufficient permissions
3553          * to create a new page
3554          *
3555          * @deprecated in 1.19; throw an exception directly instead
3556          */
3557         function noCreatePermission() {
3558                 wfDeprecated( __METHOD__, '1.19' );
3559                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3560                 throw new PermissionsError( $permission );
3561         }
3562
3563         /**
3564          * Creates a basic error page which informs the user that
3565          * they have attempted to edit a nonexistent section.
3566          */
3567         function noSuchSectionPage() {
3568                 global $wgOut;
3569
3570                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3571
3572                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3573                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3574                 $wgOut->addHTML( $res );
3575
3576                 $wgOut->returnToMain( false, $this->mTitle );
3577         }
3578
3579         /**
3580          * Produce the stock "your edit contains spam" page
3581          *
3582          * @param string|bool $match Text which triggered one or more filters
3583          * @deprecated since 1.17 Use method spamPageWithContent() instead
3584          */
3585         static function spamPage( $match = false ) {
3586                 wfDeprecated( __METHOD__, '1.17' );
3587
3588                 global $wgOut, $wgTitle;
3589
3590                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3591
3592                 $wgOut->addHTML( '<div id="spamprotected">' );
3593                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3594                 if ( $match ) {
3595                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3596                 }
3597                 $wgOut->addHTML( '</div>' );
3598
3599                 $wgOut->returnToMain( false, $wgTitle );
3600         }
3601
3602         /**
3603          * Show "your edit contains spam" page with your diff and text
3604          *
3605          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3606          */
3607         public function spamPageWithContent( $match = false ) {
3608                 global $wgOut, $wgLang;
3609                 $this->textbox2 = $this->textbox1;
3610
3611                 if ( is_array( $match ) ) {
3612                         $match = $wgLang->listToText( $match );
3613                 }
3614                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3615
3616                 $wgOut->addHTML( '<div id="spamprotected">' );
3617                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3618                 if ( $match ) {
3619                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3620                 }
3621                 $wgOut->addHTML( '</div>' );
3622
3623                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3624                 $this->showDiff();
3625
3626                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3627                 $this->showTextbox2();
3628
3629                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3630         }
3631
3632         /**
3633          * Format an anchor fragment as it would appear for a given section name
3634          * @param $text String
3635          * @return String
3636          * @private
3637          */
3638         function sectionAnchor( $text ) {
3639                 global $wgParser;
3640                 return $wgParser->guessSectionNameFromWikiText( $text );
3641         }
3642
3643         /**
3644          * Check if the browser is on a blacklist of user-agents known to
3645          * mangle UTF-8 data on form submission. Returns true if Unicode
3646          * should make it through, false if it's known to be a problem.
3647          * @return bool
3648          * @private
3649          */
3650         function checkUnicodeCompliantBrowser() {
3651                 global $wgBrowserBlackList, $wgRequest;
3652
3653                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3654                 if ( $currentbrowser === false ) {
3655                         // No User-Agent header sent? Trust it by default...
3656                         return true;
3657                 }
3658
3659                 foreach ( $wgBrowserBlackList as $browser ) {
3660                         if ( preg_match( $browser, $currentbrowser ) ) {
3661                                 return false;
3662                         }
3663                 }
3664                 return true;
3665         }
3666
3667         /**
3668          * Filter an input field through a Unicode de-armoring process if it
3669          * came from an old browser with known broken Unicode editing issues.
3670          *
3671          * @param $request WebRequest
3672          * @param $field String
3673          * @return String
3674          * @private
3675          */
3676         function safeUnicodeInput( $request, $field ) {
3677                 $text = rtrim( $request->getText( $field ) );
3678                 return $request->getBool( 'safemode' )
3679                         ? $this->unmakesafe( $text )
3680                         : $text;
3681         }
3682
3683         /**
3684          * @param $request WebRequest
3685          * @param $text string
3686          * @return string
3687          */
3688         function safeUnicodeText( $request, $text ) {
3689                 $text = rtrim( $text );
3690                 return $request->getBool( 'safemode' )
3691                         ? $this->unmakesafe( $text )
3692                         : $text;
3693         }
3694
3695         /**
3696          * Filter an output field through a Unicode armoring process if it is
3697          * going to an old browser with known broken Unicode editing issues.
3698          *
3699          * @param $text String
3700          * @return String
3701          * @private
3702          */
3703         function safeUnicodeOutput( $text ) {
3704                 global $wgContLang;
3705                 $codedText = $wgContLang->recodeForEdit( $text );
3706                 return $this->checkUnicodeCompliantBrowser()
3707                         ? $codedText
3708                         : $this->makesafe( $codedText );
3709         }
3710
3711         /**
3712          * A number of web browsers are known to corrupt non-ASCII characters
3713          * in a UTF-8 text editing environment. To protect against this,
3714          * detected browsers will be served an armored version of the text,
3715          * with non-ASCII chars converted to numeric HTML character references.
3716          *
3717          * Preexisting such character references will have a 0 added to them
3718          * to ensure that round-trips do not alter the original data.
3719          *
3720          * @param $invalue String
3721          * @return String
3722          * @private
3723          */
3724         function makesafe( $invalue ) {
3725                 // Armor existing references for reversibility.
3726                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3727
3728                 $bytesleft = 0;
3729                 $result = "";
3730                 $working = 0;
3731                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3732                         $bytevalue = ord( $invalue[$i] );
3733                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3734                                 $result .= chr( $bytevalue );
3735                                 $bytesleft = 0;
3736                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3737                                 $working = $working << 6;
3738                                 $working += ( $bytevalue & 0x3F );
3739                                 $bytesleft--;
3740                                 if ( $bytesleft <= 0 ) {
3741                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3742                                 }
3743                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3744                                 $working = $bytevalue & 0x1F;
3745                                 $bytesleft = 1;
3746                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3747                                 $working = $bytevalue & 0x0F;
3748                                 $bytesleft = 2;
3749                         } else { // 1111 0xxx
3750                                 $working = $bytevalue & 0x07;
3751                                 $bytesleft = 3;
3752                         }
3753                 }
3754                 return $result;
3755         }
3756
3757         /**
3758          * Reverse the previously applied transliteration of non-ASCII characters
3759          * back to UTF-8. Used to protect data from corruption by broken web browsers
3760          * as listed in $wgBrowserBlackList.
3761          *
3762          * @param $invalue String
3763          * @return String
3764          * @private
3765          */
3766         function unmakesafe( $invalue ) {
3767                 $result = "";
3768                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3769                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3770                                 $i += 3;
3771                                 $hexstring = "";
3772                                 do {
3773                                         $hexstring .= $invalue[$i];
3774                                         $i++;
3775                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3776
3777                                 // Do some sanity checks. These aren't needed for reversibility,
3778                                 // but should help keep the breakage down if the editor
3779                                 // breaks one of the entities whilst editing.
3780                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3781                                         $codepoint = hexdec( $hexstring );
3782                                         $result .= codepointToUtf8( $codepoint );
3783                                 } else {
3784                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3785                                 }
3786                         } else {
3787                                 $result .= substr( $invalue, $i, 1 );
3788                         }
3789                 }
3790                 // reverse the transform that we made for reversibility reasons.
3791                 return strtr( $result, array( "&#x0" => "&#x" ) );
3792         }
3793 }