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         /**
 323          * Returns if the given content model is editable.
 324          *
 325          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 326          * @return bool
 327          * @throws MWException if $modelId has no known handler
 328          */
 329         public function isSupportedContentModel( $modelId ) {
 330                 return $this->allowNonTextContent ||
 331                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 332         }
 333
 334         function submit() {
 335                 $this->edit();
 336         }
 337
 338         /**
 339          * This is the function that gets called for "action=edit". It
 340          * sets up various member variables, then passes execution to
 341          * another function, usually showEditForm()
 342          *
 343          * The edit form is self-submitting, so that when things like
 344          * preview and edit conflicts occur, we get the same form back
 345          * with the extra stuff added.  Only when the final submission
 346          * is made and all is well do we actually save and redirect to
 347          * the newly-edited page.
 348          */
 349         function edit() {
 350                 global $wgOut, $wgRequest, $wgUser;
 351                 // Allow extensions to modify/prevent this form or submission
 352                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 353                         return;
 354                 }
 355
 356                 wfProfileIn( __METHOD__ );
 357                 wfDebug( __METHOD__ . ": enter\n" );
 358
 359                 // If they used redlink=1 and the page exists, redirect to the main article
 360                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 361                         $wgOut->redirect( $this->mTitle->getFullURL() );
 362                         wfProfileOut( __METHOD__ );
 363                         return;
 364                 }
 365
 366                 $this->importFormData( $wgRequest );
 367                 $this->firsttime = false;
 368
 369                 if ( $this->live ) {
 370                         $this->livePreview();
 371                         wfProfileOut( __METHOD__ );
 372                         return;
 373                 }
 374
 375                 if ( wfReadOnly() && $this->save ) {
 376                         // Force preview
 377                         $this->save = false;
 378                         $this->preview = true;
 379                 }
 380
 381                 if ( $this->save ) {
 382                         $this->formtype = 'save';
 383                 } elseif ( $this->preview ) {
 384                         $this->formtype = 'preview';
 385                 } elseif ( $this->diff ) {
 386                         $this->formtype = 'diff';
 387                 } else { # First time through
 388                         $this->firsttime = true;
 389                         if ( $this->previewOnOpen() ) {
 390                                 $this->formtype = 'preview';
 391                         } else {
 392                                 $this->formtype = 'initial';
 393                         }
 394                 }
 395
 396                 $permErrors = $this->getEditPermissionErrors();
 397                 if ( $permErrors ) {
 398                         wfDebug( __METHOD__ . ": User can't edit\n" );
 399                         // Auto-block user's IP if the account was "hard" blocked
 400                         $wgUser->spreadAnyEditBlock();
 401
 402                         $this->displayPermissionsError( $permErrors );
 403
 404                         wfProfileOut( __METHOD__ );
 405                         return;
 406                 }
 407
 408                 wfProfileIn( __METHOD__ . "-business-end" );
 409
 410                 $this->isConflict = false;
 411                 // css / js subpages of user pages get a special treatment
 412                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 413                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 414                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 415                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 416
 417                 # Show applicable editing introductions
 418                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 419                         $this->showIntro();
 420                 }
 421
 422                 # Attempt submission here.  This will check for edit conflicts,
 423                 # and redundantly check for locked database, blocked IPs, etc.
 424                 # that edit() already checked just in case someone tries to sneak
 425                 # in the back door with a hand-edited submission URL.
 426
 427                 if ( 'save' == $this->formtype ) {
 428                         if ( !$this->attemptSave() ) {
 429                                 wfProfileOut( __METHOD__ . "-business-end" );
 430                                 wfProfileOut( __METHOD__ );
 431                                 return;
 432                         }
 433                 }
 434
 435                 # First time through: get contents, set time for conflict
 436                 # checking, etc.
 437                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 438                         if ( $this->initialiseForm() === false ) {
 439                                 $this->noSuchSectionPage();
 440                                 wfProfileOut( __METHOD__ . "-business-end" );
 441                                 wfProfileOut( __METHOD__ );
 442                                 return;
 443                         }
 444
 445                         if ( !$this->mTitle->getArticleID() ) {
 446                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 447                         } else {
 448                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 449                         }
 450
 451                 }
 452
 453                 $this->showEditForm();
 454                 wfProfileOut( __METHOD__ . "-business-end" );
 455                 wfProfileOut( __METHOD__ );
 456         }
 457
 458         /**
 459          * @return array
 460          */
 461         protected function getEditPermissionErrors() {
 462                 global $wgUser;
 463                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 464                 # Can this title be created?
 465                 if ( !$this->mTitle->exists() ) {
 466                         $permErrors = array_merge( $permErrors,
 467                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 468                 }
 469                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 470                 $remove = array();
 471                 foreach ( $permErrors as $error ) {
 472                         if ( ( $this->preview || $this->diff )
 473                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 474                         ) {
 475                                 $remove[] = $error;
 476                         }
 477                 }
 478                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 479                 return $permErrors;
 480         }
 481
 482         /**
 483          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 484          * but with the following differences:
 485          * - If redlink=1, the user will be redirected to the page
 486          * - If there is content to display or the error occurs while either saving,
 487          *   previewing or showing the difference, it will be a
 488          *   "View source for ..." page displaying the source code after the error message.
 489          *
 490          * @since 1.19
 491          * @param array $permErrors of permissions errors, as returned by
 492          *                    Title::getUserPermissionsErrors().
 493          * @throws PermissionsError
 494          */
 495         protected function displayPermissionsError( array $permErrors ) {
 496                 global $wgRequest, $wgOut;
 497
 498                 if ( $wgRequest->getBool( 'redlink' ) ) {
 499                         // The edit page was reached via a red link.
 500                         // Redirect to the article page and let them click the edit tab if
 501                         // they really want a permission error.
 502                         $wgOut->redirect( $this->mTitle->getFullURL() );
 503                         return;
 504                 }
 505
 506                 $content = $this->getContentObject();
 507
 508                 # Use the normal message if there's nothing to display
 509                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 510                         $action = $this->mTitle->exists() ? 'edit' :
 511                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 512                         throw new PermissionsError( $action, $permErrors );
 513                 }
 514
 515                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 516                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 517                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 518                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 519                 $wgOut->addHTML( "<hr />\n" );
 520
 521                 # If the user made changes, preserve them when showing the markup
 522                 # (This happens when a user is blocked during edit, for instance)
 523                 if ( !$this->firsttime ) {
 524                         $text = $this->textbox1;
 525                         $wgOut->addWikiMsg( 'viewyourtext' );
 526                 } else {
 527                         $text = $this->toEditText( $content );
 528                         $wgOut->addWikiMsg( 'viewsourcetext' );
 529                 }
 530
 531                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 532
 533                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 534                         Linker::formatTemplates( $this->getTemplates() ) ) );
 535
 536                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 537
 538                 if ( $this->mTitle->exists() ) {
 539                         $wgOut->returnToMain( null, $this->mTitle );
 540                 }
 541         }
 542
 543         /**
 544          * Show a read-only error
 545          * Parameters are the same as OutputPage:readOnlyPage()
 546          * Redirect to the article page if redlink=1
 547          * @deprecated in 1.19; use displayPermissionsError() instead
 548          */
 549         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 550                 wfDeprecated( __METHOD__, '1.19' );
 551
 552                 global $wgRequest, $wgOut;
 553                 if ( $wgRequest->getBool( 'redlink' ) ) {
 554                         // The edit page was reached via a red link.
 555                         // Redirect to the article page and let them click the edit tab if
 556                         // they really want a permission error.
 557                         $wgOut->redirect( $this->mTitle->getFullURL() );
 558                 } else {
 559                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 560                 }
 561         }
 562
 563         /**
 564          * Should we show a preview when the edit form is first shown?
 565          *
 566          * @return bool
 567          */
 568         protected function previewOnOpen() {
 569                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 570                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 571                         // Explicit override from request
 572                         return true;
 573                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 574                         // Explicit override from request
 575                         return false;
 576                 } elseif ( $this->section == 'new' ) {
 577                         // Nothing *to* preview for new sections
 578                         return false;
 579                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 580                         // Standard preference behavior
 581                         return true;
 582                 } elseif ( !$this->mTitle->exists()
 583                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 584                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 585                 ) {
 586                         // Categories are special
 587                         return true;
 588                 } else {
 589                         return false;
 590                 }
 591         }
 592
 593         /**
 594          * Checks whether the user entered a skin name in uppercase,
 595          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 596          *
 597          * @return bool
 598          */
 599         protected function isWrongCaseCssJsPage() {
 600                 if ( $this->mTitle->isCssJsSubpage() ) {
 601                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 602                         $skins = array_merge(
 603                                 array_keys( Skin::getSkinNames() ),
 604                                 array( 'common' )
 605                         );
 606                         return !in_array( $name, $skins )
 607                                 && in_array( strtolower( $name ), $skins );
 608                 } else {
 609                         return false;
 610                 }
 611         }
 612
 613         /**
 614          * Returns whether section editing is supported for the current page.
 615          * Subclasses may override this to replace the default behavior, which is
 616          * to check ContentHandler::supportsSections.
 617          *
 618          * @return bool true if this edit page supports sections, false otherwise.
 619          */
 620         protected function isSectionEditSupported() {
 621                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 622                 return $contentHandler->supportsSections();
 623         }
 624
 625         /**
 626          * This function collects the form data and uses it to populate various member variables.
 627          * @param $request WebRequest
 628          * @throws ErrorPageError
 629          */
 630         function importFormData( &$request ) {
 631                 global $wgContLang, $wgUser;
 632
 633                 wfProfileIn( __METHOD__ );
 634
 635                 # Section edit can come from either the form or a link
 636                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 637
 638                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 639                         wfProfileOut( __METHOD__ );
 640                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 641                 }
 642
 643                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 644
 645                 if ( $request->wasPosted() ) {
 646                         # These fields need to be checked for encoding.
 647                         # Also remove trailing whitespace, but don't remove _initial_
 648                         # whitespace from the text boxes. This may be significant formatting.
 649                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 650                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 651                                 // Skip this if wpTextbox2 has input, it indicates that we came
 652                                 // from a conflict page with raw page text, not a custom form
 653                                 // modified by subclasses
 654                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 655                                 $textbox1 = $this->importContentFormData( $request );
 656                                 if ( $textbox1 !== null ) {
 657                                         $this->textbox1 = $textbox1;
 658                                 }
 659
 660                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 661                         }
 662
 663                         # Truncate for whole multibyte characters
 664                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 665
 666                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 667                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 668                         # section titles.
 669                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 670
 671                         # Treat sectiontitle the same way as summary.
 672                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 673                         # currently doing double duty as both edit summary and section title. Right now this
 674                         # is just to allow API edits to work around this limitation, but this should be
 675                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 676                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 677                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 678
 679                         $this->edittime = $request->getVal( 'wpEdittime' );
 680                         $this->starttime = $request->getVal( 'wpStarttime' );
 681
 682                         $undidRev = $request->getInt( 'wpUndidRevision' );
 683                         if ( $undidRev ) {
 684                                 $this->undidRev = $undidRev;
 685                         }
 686
 687                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 688
 689                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 690                                 // wpTextbox1 field is missing, possibly due to being "too big"
 691                                 // according to some filter rules such as Suhosin's setting for
 692                                 // suhosin.request.max_value_length (d'oh)
 693                                 $this->incompleteForm = true;
 694                         } else {
 695                                 // edittime should be one of our last fields; if it's missing,
 696                                 // the submission probably broke somewhere in the middle.
 697                                 $this->incompleteForm = is_null( $this->edittime );
 698                         }
 699                         if ( $this->incompleteForm ) {
 700                                 # If the form is incomplete, force to preview.
 701                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 702                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 703                                 $this->preview = true;
 704                         } else {
 705                                 /* Fallback for live preview */
 706                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 707                                 $this->diff = $request->getCheck( 'wpDiff' );
 708
 709                                 // Remember whether a save was requested, so we can indicate
 710                                 // if we forced preview due to session failure.
 711                                 $this->mTriedSave = !$this->preview;
 712
 713                                 if ( $this->tokenOk( $request ) ) {
 714                                         # Some browsers will not report any submit button
 715                                         # if the user hits enter in the comment box.
 716                                         # The unmarked state will be assumed to be a save,
 717                                         # if the form seems otherwise complete.
 718                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 719                                 } elseif ( $this->diff ) {
 720                                         # Failed token check, but only requested "Show Changes".
 721                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 722                                 } else {
 723                                         # Page might be a hack attempt posted from
 724                                         # an external site. Preview instead of saving.
 725                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 726                                         $this->preview = true;
 727                                 }
 728                         }
 729                         $this->save = !$this->preview && !$this->diff;
 730                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 731                                 $this->edittime = null;
 732                         }
 733
 734                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 735                                 $this->starttime = null;
 736                         }
 737
 738                         $this->recreate = $request->getCheck( 'wpRecreate' );
 739
 740                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 741                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 742
 743                         # Don't force edit summaries when a user is editing their own user or talk page
 744                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 745                                 && $this->mTitle->getText() == $wgUser->getName()
 746                         ) {
 747                                 $this->allowBlankSummary = true;
 748                         } else {
 749                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 750                         }
 751
 752                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 753                 } else {
 754                         # Not a posted form? Start with nothing.
 755                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 756                         $this->textbox1 = '';
 757                         $this->summary = '';
 758                         $this->sectiontitle = '';
 759                         $this->edittime = '';
 760                         $this->starttime = wfTimestampNow();
 761                         $this->edit = false;
 762                         $this->preview = false;
 763                         $this->save = false;
 764                         $this->diff = false;
 765                         $this->minoredit = false;
 766                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overridden by request parameters
 767                         $this->recreate = false;
 768
 769                         // When creating a new section, we can preload a section title by passing it as the
 770                         // preloadtitle parameter in the URL (Bug 13100)
 771                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 772                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 773                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 774                                 $this->summary = $request->getVal( 'preloadtitle' );
 775                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 776                                 $this->summary = $request->getText( 'summary' );
 777                                 if ( $this->summary !== '' ) {
 778                                         $this->hasPresetSummary = true;
 779                                 }
 780                         }
 781
 782                         if ( $request->getVal( 'minor' ) ) {
 783                                 $this->minoredit = true;
 784                         }
 785                 }
 786
 787                 $this->oldid = $request->getInt( 'oldid' );
 788
 789                 $this->bot = $request->getBool( 'bot', true );
 790                 $this->nosummary = $request->getBool( 'nosummary' );
 791
 792                 $this->contentModel = $request->getText( 'model', $this->contentModel ); #may be overridden by revision
 793                 $this->contentFormat = $request->getText( 'format', $this->contentFormat ); #may be overridden by revision
 794
 795                 if ( !ContentHandler::getForModelID( $this->contentModel )->isSupportedFormat( $this->contentFormat ) ) {
 796                         throw new ErrorPageError(
 797                                 'editpage-notsupportedcontentformat-title',
 798                                 'editpage-notsupportedcontentformat-text',
 799                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 800                         );
 801                 }
 802                 #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
 803
 804                 $this->live = $request->getCheck( 'live' );
 805                 $this->editintro = $request->getText( 'editintro',
 806                         // Custom edit intro for new sections
 807                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 808
 809                 // Allow extensions to modify form data
 810                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 811
 812                 wfProfileOut( __METHOD__ );
 813         }
 814
 815         /**
 816          * Subpage overridable method for extracting the page content data from the
 817          * posted form to be placed in $this->textbox1, if using customized input
 818          * this method should be overridden and return the page text that will be used
 819          * for saving, preview parsing and so on...
 820          *
 821          * @param $request WebRequest
 822          */
 823         protected function importContentFormData( &$request ) {
 824                 return; // Don't do anything, EditPage already extracted wpTextbox1
 825         }
 826
 827         /**
 828          * Initialise form fields in the object
 829          * Called on the first invocation, e.g. when a user clicks an edit link
 830          * @return bool -- if the requested section is valid
 831          */
 832         function initialiseForm() {
 833                 global $wgUser;
 834                 $this->edittime = $this->mArticle->getTimestamp();
 835
 836                 $content = $this->getContentObject( false ); #TODO: track content object?!
 837                 if ( $content === false ) {
 838                         return false;
 839                 }
 840                 $this->textbox1 = $this->toEditText( $content );
 841
 842                 // activate checkboxes if user wants them to be always active
 843                 # Sort out the "watch" checkbox
 844                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 845                         # Watch all edits
 846                         $this->watchthis = true;
 847                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 848                         # Watch creations
 849                         $this->watchthis = true;
 850                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 851                         # Already watched
 852                         $this->watchthis = true;
 853                 }
 854                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 855                         $this->minoredit = true;
 856                 }
 857                 if ( $this->textbox1 === false ) {
 858                         return false;
 859                 }
 860                 return true;
 861         }
 862
 863         /**
 864          * Fetch initial editing page content.
 865          *
 866          * @param $def_text string|bool
 867          * @return mixed string on success, $def_text for invalid sections
 868          * @private
 869          * @deprecated since 1.21, get WikiPage::getContent() instead.
 870          */
 871         function getContent( $def_text = false ) {
 872                 ContentHandler::deprecated( __METHOD__, '1.21' );
 873
 874                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 875                         $def_content = $this->toEditContent( $def_text );
 876                 } else {
 877                         $def_content = false;
 878                 }
 879
 880                 $content = $this->getContentObject( $def_content );
 881
 882                 // Note: EditPage should only be used with text based content anyway.
 883                 return $this->toEditText( $content );
 884         }
 885
 886         /**
 887          * @param Content|null $def_content The default value to return
 888          *
 889          * @return mixed Content on success, $def_content for invalid sections
 890          *
 891          * @since 1.21
 892          */
 893         protected function getContentObject( $def_content = null ) {
 894                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 895
 896                 wfProfileIn( __METHOD__ );
 897
 898                 $content = false;
 899
 900                 // For message page not locally set, use the i18n message.
 901                 // For other non-existent articles, use preload text if any.
 902                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 903                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 904                                 # If this is a system message, get the default text.
 905                                 $msg = $this->mTitle->getDefaultMessageText();
 906
 907                                 $content = $this->toEditContent( $msg );
 908                         }
 909                         if ( $content === false ) {
 910                                 # If requested, preload some text.
 911                                 $preload = $wgRequest->getVal( 'preload',
 912                                         // Custom preload text for new sections
 913                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 914
 915                                 $content = $this->getPreloadedContent( $preload );
 916                         }
 917                 // For existing pages, get text based on "undo" or section parameters.
 918                 } else {
 919                         if ( $this->section != '' ) {
 920                                 // Get section edit text (returns $def_text for invalid sections)
 921                                 $orig = $this->getOriginalContent();
 922                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 923
 924                                 if ( !$content ) {
 925                                         $content = $def_content;
 926                                 }
 927                         } else {
 928                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 929                                 $undo = $wgRequest->getInt( 'undo' );
 930
 931                                 if ( $undo > 0 && $undoafter > 0 ) {
 932
 933                                         $undorev = Revision::newFromId( $undo );
 934                                         $oldrev = Revision::newFromId( $undoafter );
 935
 936                                         # Sanity check, make sure it's the right page,
 937                                         # the revisions exist and they were not deleted.
 938                                         # Otherwise, $content will be left as-is.
 939                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 940                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 941                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 942
 943                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 944
 945                                                 if ( $content === false ) {
 946                                                         # Warn the user that something went wrong
 947                                                         $undoMsg = 'failure';
 948                                                 } else {
 949                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
 950                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
 951                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
 952
 953                                                         if ( $newContent->equals( $oldContent ) ) {
 954                                                                 # Tell the user that the undo results in no change,
 955                                                                 # i.e. the revisions were already undone.
 956                                                                 $undoMsg = 'nochange';
 957                                                                 $content = false;
 958                                                         } else {
 959                                                                 # Inform the user of our success and set an automatic edit summary
 960                                                                 $undoMsg = 'success';
 961
 962                                                                 # If we just undid one rev, use an autosummary
 963                                                                 $firstrev = $oldrev->getNext();
 964                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
 965                                                                         $userText = $undorev->getUserText();
 966                                                                         if ( $userText === '' ) {
 967                                                                                 $undoSummary = wfMessage(
 968                                                                                         'undo-summary-username-hidden',
 969                                                                                         $undo
 970                                                                                 )->inContentLanguage()->text();
 971                                                                         } else {
 972                                                                                 $undoSummary = wfMessage(
 973                                                                                         'undo-summary',
 974                                                                                         $undo,
 975                                                                                         $userText
 976                                                                                 )->inContentLanguage()->text();
 977                                                                         }
 978                                                                         if ( $this->summary === '' ) {
 979                                                                                 $this->summary = $undoSummary;
 980                                                                         } else {
 981                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 982                                                                                         ->inContentLanguage()->text() . $this->summary;
 983                                                                         }
 984                                                                         $this->undidRev = $undo;
 985                                                                 }
 986                                                                 $this->formtype = 'diff';
 987                                                         }
 988                                                 }
 989                                         } else {
 990                                                 // Failed basic sanity checks.
 991                                                 // Older revisions may have been removed since the link
 992                                                 // was created, or we may simply have got bogus input.
 993                                                 $undoMsg = 'norev';
 994                                         }
 995
 996                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
 997                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 998                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 999                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1000                                 }
1001
1002                                 if ( $content === false ) {
1003                                         $content = $this->getOriginalContent();
1004                                 }
1005                         }
1006                 }
1007
1008                 wfProfileOut( __METHOD__ );
1009                 return $content;
1010         }
1011
1012         /**
1013          * Get the content of the wanted revision, without section extraction.
1014          *
1015          * The result of this function can be used to compare user's input with
1016          * section replaced in its context (using WikiPage::replaceSection())
1017          * to the original text of the edit.
1018          *
1019          * This differs from Article::getContent() that when a missing revision is
1020          * encountered the result will be null and not the
1021          * 'missing-revision' message.
1022          *
1023          * @since 1.19
1024          * @return Content|null
1025          */
1026         private function getOriginalContent() {
1027                 if ( $this->section == 'new' ) {
1028                         return $this->getCurrentContent();
1029                 }
1030                 $revision = $this->mArticle->getRevisionFetched();
1031                 if ( $revision === null ) {
1032                         if ( !$this->contentModel ) {
1033                                 $this->contentModel = $this->getTitle()->getContentModel();
1034                         }
1035                         $handler = ContentHandler::getForModelID( $this->contentModel );
1036
1037                         return $handler->makeEmptyContent();
1038                 }
1039                 $content = $revision->getContent();
1040                 return $content;
1041         }
1042
1043         /**
1044          * Get the current content of the page. This is basically similar to
1045          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1046          * content object is returned instead of null.
1047          *
1048          * @since 1.21
1049          * @return Content
1050          */
1051         protected function getCurrentContent() {
1052                 $rev = $this->mArticle->getRevision();
1053                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1054
1055                 if ( $content === false || $content === null ) {
1056                         if ( !$this->contentModel ) {
1057                                 $this->contentModel = $this->getTitle()->getContentModel();
1058                         }
1059                         $handler = ContentHandler::getForModelID( $this->contentModel );
1060
1061                         return $handler->makeEmptyContent();
1062                 } else {
1063                         # nasty side-effect, but needed for consistency
1064                         $this->contentModel = $rev->getContentModel();
1065                         $this->contentFormat = $rev->getContentFormat();
1066
1067                         return $content;
1068                 }
1069         }
1070
1071         /**
1072          * Use this method before edit() to preload some text into the edit box
1073          *
1074          * @param $text string
1075          * @deprecated since 1.21, use setPreloadedContent() instead.
1076          */
1077         public function setPreloadedText( $text ) {
1078                 ContentHandler::deprecated( __METHOD__, "1.21" );
1079
1080                 $content = $this->toEditContent( $text );
1081
1082                 $this->setPreloadedContent( $content );
1083         }
1084
1085         /**
1086          * Use this method before edit() to preload some content into the edit box
1087          *
1088          * @param $content Content
1089          *
1090          * @since 1.21
1091          */
1092         public function setPreloadedContent( Content $content ) {
1093                 $this->mPreloadContent = $content;
1094         }
1095
1096         /**
1097          * Get the contents to be preloaded into the box, either set by
1098          * an earlier setPreloadText() or by loading the given page.
1099          *
1100          * @param string $preload representing the title to preload from.
1101          *
1102          * @return String
1103          *
1104          * @deprecated since 1.21, use getPreloadedContent() instead
1105          */
1106         protected function getPreloadedText( $preload ) {
1107                 ContentHandler::deprecated( __METHOD__, "1.21" );
1108
1109                 $content = $this->getPreloadedContent( $preload );
1110                 $text = $this->toEditText( $content );
1111
1112                 return $text;
1113         }
1114
1115         /**
1116          * Get the contents to be preloaded into the box, either set by
1117          * an earlier setPreloadText() or by loading the given page.
1118          *
1119          * @param string $preload representing the title to preload from.
1120          *
1121          * @return Content
1122          *
1123          * @since 1.21
1124          */
1125         protected function getPreloadedContent( $preload ) {
1126                 global $wgUser;
1127
1128                 if ( !empty( $this->mPreloadContent ) ) {
1129                         return $this->mPreloadContent;
1130                 }
1131
1132                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1133
1134                 if ( $preload === '' ) {
1135                         return $handler->makeEmptyContent();
1136                 }
1137
1138                 $title = Title::newFromText( $preload );
1139                 # Check for existence to avoid getting MediaWiki:Noarticletext
1140                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1141                         //TODO: somehow show a warning to the user!
1142                         return $handler->makeEmptyContent();
1143                 }
1144
1145                 $page = WikiPage::factory( $title );
1146                 if ( $page->isRedirect() ) {
1147                         $title = $page->getRedirectTarget();
1148                         # Same as before
1149                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1150                                 //TODO: somehow show a warning to the user!
1151                                 return $handler->makeEmptyContent();
1152                         }
1153                         $page = WikiPage::factory( $title );
1154                 }
1155
1156                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1157                 $content = $page->getContent( Revision::RAW );
1158
1159                 if ( !$content ) {
1160                         //TODO: somehow show a warning to the user!
1161                         return $handler->makeEmptyContent();
1162                 }
1163
1164                 if ( $content->getModel() !== $handler->getModelID() ) {
1165                         $converted = $content->convert( $handler->getModelID() );
1166
1167                         if ( !$converted ) {
1168                                 //TODO: somehow show a warning to the user!
1169                                 wfDebug( "Attempt to preload incompatible content: "
1170                                                 . "can't convert " . $content->getModel()
1171                                                 . " to " . $handler->getModelID() );
1172
1173                                 return $handler->makeEmptyContent();
1174                         }
1175
1176                         $content = $converted;
1177                 }
1178
1179                 return $content->preloadTransform( $title, $parserOptions );
1180         }
1181
1182         /**
1183          * Make sure the form isn't faking a user's credentials.
1184          *
1185          * @param $request WebRequest
1186          * @return bool
1187          * @private
1188          */
1189         function tokenOk( &$request ) {
1190                 global $wgUser;
1191                 $token = $request->getVal( 'wpEditToken' );
1192                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1193                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1194                 return $this->mTokenOk;
1195         }
1196
1197         /**
1198          * Sets post-edit cookie indicating the user just saved a particular revision.
1199          *
1200          * This uses a temporary cookie for each revision ID so separate saves will never
1201          * interfere with each other.
1202          *
1203          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1204          * the redirect.  It must be clearable by JavaScript code, so it must not be
1205          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1206          * variable.
1207          *
1208          * We use a path of '/' since wgCookiePath is not exposed to JS
1209          *
1210          * If the variable were set on the server, it would be cached, which is unwanted
1211          * since the post-edit state should only apply to the load right after the save.
1212          */
1213         protected function setPostEditCookie() {
1214                 $revisionId = $this->mArticle->getLatest();
1215                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1216
1217                 $response = RequestContext::getMain()->getRequest()->response();
1218                 $response->setcookie( $postEditKey, '1', time() + self::POST_EDIT_COOKIE_DURATION, array(
1219                         'path' => '/',
1220                         'httpOnly' => false,
1221                 ) );
1222         }
1223
1224         /**
1225          * Attempt submission
1226          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1227          * @return bool false if output is done, true if the rest of the form should be displayed
1228          */
1229         public function attemptSave() {
1230                 global $wgUser;
1231
1232                 $resultDetails = false;
1233                 # Allow bots to exempt some edits from bot flagging
1234                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1235                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1236
1237                 return $this->handleStatus( $status, $resultDetails );
1238         }
1239
1240         /**
1241          * Handle status, such as after attempt save
1242          *
1243          * @param Status $status
1244          * @param array|bool $resultDetails
1245          *
1246          * @throws ErrorPageError
1247          * return bool false, if output is done, true if rest of the form should be displayed
1248          */
1249         private function handleStatus( Status $status, $resultDetails ) {
1250                 global $wgUser, $wgOut;
1251
1252                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1253                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1254                         $this->didSave = true;
1255                         if ( !$resultDetails['nullEdit'] ) {
1256                                 $this->setPostEditCookie();
1257                         }
1258                 }
1259
1260                 switch ( $status->value ) {
1261                         case self::AS_HOOK_ERROR_EXPECTED:
1262                         case self::AS_CONTENT_TOO_BIG:
1263                         case self::AS_ARTICLE_WAS_DELETED:
1264                         case self::AS_CONFLICT_DETECTED:
1265                         case self::AS_SUMMARY_NEEDED:
1266                         case self::AS_TEXTBOX_EMPTY:
1267                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1268                         case self::AS_END:
1269                                 return true;
1270
1271                         case self::AS_HOOK_ERROR:
1272                                 return false;
1273
1274                         case self::AS_PARSE_ERROR:
1275                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1276                                 return true;
1277
1278                         case self::AS_SUCCESS_NEW_ARTICLE:
1279                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1280                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1281                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1282                                 return false;
1283
1284                         case self::AS_SUCCESS_UPDATE:
1285                                 $extraQuery = '';
1286                                 $sectionanchor = $resultDetails['sectionanchor'];
1287
1288                                 // Give extensions a chance to modify URL query on update
1289                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1290
1291                                 if ( $resultDetails['redirect'] ) {
1292                                         if ( $extraQuery == '' ) {
1293                                                 $extraQuery = 'redirect=no';
1294                                         } else {
1295                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1296                                         }
1297                                 }
1298                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1299                                 return false;
1300
1301                         case self::AS_BLANK_ARTICLE:
1302                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1303                                 return false;
1304
1305                         case self::AS_SPAM_ERROR:
1306                                 $this->spamPageWithContent( $resultDetails['spam'] );
1307                                 return false;
1308
1309                         case self::AS_BLOCKED_PAGE_FOR_USER:
1310                                 throw new UserBlockedError( $wgUser->getBlock() );
1311
1312                         case self::AS_IMAGE_REDIRECT_ANON:
1313                         case self::AS_IMAGE_REDIRECT_LOGGED:
1314                                 throw new PermissionsError( 'upload' );
1315
1316                         case self::AS_READ_ONLY_PAGE_ANON:
1317                         case self::AS_READ_ONLY_PAGE_LOGGED:
1318                                 throw new PermissionsError( 'edit' );
1319
1320                         case self::AS_READ_ONLY_PAGE:
1321                                 throw new ReadOnlyError;
1322
1323                         case self::AS_RATE_LIMITED:
1324                                 throw new ThrottledError();
1325
1326                         case self::AS_NO_CREATE_PERMISSION:
1327                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1328                                 throw new PermissionsError( $permission );
1329
1330                         default:
1331                                 // We don't recognize $status->value. The only way that can happen
1332                                 // is if an extension hook aborted from inside ArticleSave.
1333                                 // Render the status object into $this->hookError
1334                                 // FIXME this sucks, we should just use the Status object throughout
1335                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1336                                         '</div>';
1337                                 return true;
1338                 }
1339         }
1340
1341         /**
1342          * Run hooks that can filter edits just before they get saved.
1343          *
1344          * @param Content $content the Content to filter.
1345          * @param Status  $status for reporting the outcome to the caller
1346          * @param User    $user the user performing the edit
1347          *
1348          * @return bool
1349          */
1350         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1351                 // Run old style post-section-merge edit filter
1352                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1353                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1354
1355                         # Error messages etc. could be handled within the hook...
1356                         $status->fatal( 'hookaborted' );
1357                         $status->value = self::AS_HOOK_ERROR;
1358                         return false;
1359                 } elseif ( $this->hookError != '' ) {
1360                         # ...or the hook could be expecting us to produce an error
1361                         $status->fatal( 'hookaborted' );
1362                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1363                         return false;
1364                 }
1365
1366                 // Run new style post-section-merge edit filter
1367                 if ( !wfRunHooks( 'EditFilterMergedContent',
1368                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1369                                 $user, $this->minoredit ) ) ) {
1370
1371                         # Error messages etc. could be handled within the hook...
1372                         // XXX: $status->value may already be something informative...
1373                         $this->hookError = $status->getWikiText();
1374                         $status->fatal( 'hookaborted' );
1375                         $status->value = self::AS_HOOK_ERROR;
1376                         return false;
1377                 } elseif ( !$status->isOK() ) {
1378                         # ...or the hook could be expecting us to produce an error
1379                         // FIXME this sucks, we should just use the Status object throughout
1380                         $this->hookError = $status->getWikiText();
1381                         $status->fatal( 'hookaborted' );
1382                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1383                         return false;
1384                 }
1385
1386                 return true;
1387         }
1388
1389         /**
1390          * Attempt submission (no UI)
1391          *
1392          * @param array $result array to add statuses to, currently with the possible keys:
1393          *  spam - string - Spam string from content if any spam is detected by matchSpamRegex
1394          *  sectionanchor - string - Section anchor for a section save
1395          *  nullEdit - boolean - Set if doEditContent is OK.  True if null edit, false otherwise.
1396          *  redirect - boolean -  Set if doEditContent is OK.  True if resulting revision is a redirect
1397          * @param bool $bot True if edit is being made under the bot right.
1398          *
1399          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1400          *
1401          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1402          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1403          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1404          */
1405         function internalAttemptSave( &$result, $bot = false ) {
1406                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1407
1408                 $status = Status::newGood();
1409
1410                 wfProfileIn( __METHOD__ );
1411                 wfProfileIn( __METHOD__ . '-checks' );
1412
1413                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1414                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1415                         $status->fatal( 'hookaborted' );
1416                         $status->value = self::AS_HOOK_ERROR;
1417                         wfProfileOut( __METHOD__ . '-checks' );
1418                         wfProfileOut( __METHOD__ );
1419                         return $status;
1420                 }
1421
1422                 $spam = $wgRequest->getText( 'wpAntispam' );
1423                 if ( $spam !== '' ) {
1424                         wfDebugLog(
1425                                 'SimpleAntiSpam',
1426                                 $wgUser->getName() .
1427                                 ' editing "' .
1428                                 $this->mTitle->getPrefixedText() .
1429                                 '" submitted bogus field "' .
1430                                 $spam .
1431                                 '"'
1432                         );
1433                         $status->fatal( 'spamprotectionmatch', false );
1434                         $status->value = self::AS_SPAM_ERROR;
1435                         wfProfileOut( __METHOD__ . '-checks' );
1436                         wfProfileOut( __METHOD__ );
1437                         return $status;
1438                 }
1439
1440                 try {
1441                         # Construct Content object
1442                         $textbox_content = $this->toEditContent( $this->textbox1 );
1443                 } catch ( MWContentSerializationException $ex ) {
1444                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1445                         $status->value = self::AS_PARSE_ERROR;
1446                         wfProfileOut( __METHOD__ . '-checks' );
1447                         wfProfileOut( __METHOD__ );
1448                         return $status;
1449                 }
1450
1451                 # Check image redirect
1452                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1453                         $textbox_content->isRedirect() &&
1454                         !$wgUser->isAllowed( 'upload' ) ) {
1455                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1456                                 $status->setResult( false, $code );
1457
1458                                 wfProfileOut( __METHOD__ . '-checks' );
1459                                 wfProfileOut( __METHOD__ );
1460
1461                                 return $status;
1462                 }
1463
1464                 # Check for spam
1465                 $match = self::matchSummarySpamRegex( $this->summary );
1466                 if ( $match === false && $this->section == 'new' ) {
1467                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1468                         # regular summaries, it is added to the actual wikitext.
1469                         if ( $this->sectiontitle !== '' ) {
1470                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1471                                 $match = self::matchSpamRegex( $this->sectiontitle );
1472                         } else {
1473                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1474                                 # is used with the 'summary' parameter.
1475                                 $match = self::matchSpamRegex( $this->summary );
1476                         }
1477                 }
1478                 if ( $match === false ) {
1479                         $match = self::matchSpamRegex( $this->textbox1 );
1480                 }
1481                 if ( $match !== false ) {
1482                         $result['spam'] = $match;
1483                         $ip = $wgRequest->getIP();
1484                         $pdbk = $this->mTitle->getPrefixedDBkey();
1485                         $match = str_replace( "\n", '', $match );
1486                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1487                         $status->fatal( 'spamprotectionmatch', $match );
1488                         $status->value = self::AS_SPAM_ERROR;
1489                         wfProfileOut( __METHOD__ . '-checks' );
1490                         wfProfileOut( __METHOD__ );
1491                         return $status;
1492                 }
1493                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1494                         # Error messages etc. could be handled within the hook...
1495                         $status->fatal( 'hookaborted' );
1496                         $status->value = self::AS_HOOK_ERROR;
1497                         wfProfileOut( __METHOD__ . '-checks' );
1498                         wfProfileOut( __METHOD__ );
1499                         return $status;
1500                 } elseif ( $this->hookError != '' ) {
1501                         # ...or the hook could be expecting us to produce an error
1502                         $status->fatal( 'hookaborted' );
1503                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1504                         wfProfileOut( __METHOD__ . '-checks' );
1505                         wfProfileOut( __METHOD__ );
1506                         return $status;
1507                 }
1508
1509                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1510                         // Auto-block user's IP if the account was "hard" blocked
1511                         $wgUser->spreadAnyEditBlock();
1512                         # Check block state against master, thus 'false'.
1513                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1514                         wfProfileOut( __METHOD__ . '-checks' );
1515                         wfProfileOut( __METHOD__ );
1516                         return $status;
1517                 }
1518
1519                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1520                 if ( $this->kblength > $wgMaxArticleSize ) {
1521                         // Error will be displayed by showEditForm()
1522                         $this->tooBig = true;
1523                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1524                         wfProfileOut( __METHOD__ . '-checks' );
1525                         wfProfileOut( __METHOD__ );
1526                         return $status;
1527                 }
1528
1529                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1530                         if ( $wgUser->isAnon() ) {
1531                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1532                                 wfProfileOut( __METHOD__ . '-checks' );
1533                                 wfProfileOut( __METHOD__ );
1534                                 return $status;
1535                         } else {
1536                                 $status->fatal( 'readonlytext' );
1537                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1538                                 wfProfileOut( __METHOD__ . '-checks' );
1539                                 wfProfileOut( __METHOD__ );
1540                                 return $status;
1541                         }
1542                 }
1543
1544                 if ( wfReadOnly() ) {
1545                         $status->fatal( 'readonlytext' );
1546                         $status->value = self::AS_READ_ONLY_PAGE;
1547                         wfProfileOut( __METHOD__ . '-checks' );
1548                         wfProfileOut( __METHOD__ );
1549                         return $status;
1550                 }
1551                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1552                         $status->fatal( 'actionthrottledtext' );
1553                         $status->value = self::AS_RATE_LIMITED;
1554                         wfProfileOut( __METHOD__ . '-checks' );
1555                         wfProfileOut( __METHOD__ );
1556                         return $status;
1557                 }
1558
1559                 # If the article has been deleted while editing, don't save it without
1560                 # confirmation
1561                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1562                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1563                         wfProfileOut( __METHOD__ . '-checks' );
1564                         wfProfileOut( __METHOD__ );
1565                         return $status;
1566                 }
1567
1568                 wfProfileOut( __METHOD__ . '-checks' );
1569
1570                 # Load the page data from the master. If anything changes in the meantime,
1571                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1572                 $this->mArticle->loadPageData( 'fromdbmaster' );
1573                 $new = !$this->mArticle->exists();
1574
1575                 if ( $new ) {
1576                         // Late check for create permission, just in case *PARANOIA*
1577                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1578                                 $status->fatal( 'nocreatetext' );
1579                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1580                                 wfDebug( __METHOD__ . ": no create permission\n" );
1581                                 wfProfileOut( __METHOD__ );
1582                                 return $status;
1583                         }
1584
1585                         // Don't save a new page if it's blank or if it's a MediaWiki:
1586                         // message with content equivalent to default (allow empty pages
1587                         // in this case to disable messages, see bug 50124)
1588                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1589                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1590                                 $defaultText = $defaultMessageText;
1591                         } else {
1592                                 $defaultText = '';
1593                         }
1594
1595                         if ( $this->textbox1 === $defaultText ) {
1596                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1597                                 wfProfileOut( __METHOD__ );
1598                                 return $status;
1599                         }
1600
1601                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1602                                 wfProfileOut( __METHOD__ );
1603                                 return $status;
1604                         }
1605
1606                         $content = $textbox_content;
1607
1608                         $result['sectionanchor'] = '';
1609                         if ( $this->section == 'new' ) {
1610                                 if ( $this->sectiontitle !== '' ) {
1611                                         // Insert the section title above the content.
1612                                         $content = $content->addSectionHeader( $this->sectiontitle );
1613
1614                                         // Jump to the new section
1615                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1616
1617                                         // If no edit summary was specified, create one automatically from the section
1618                                         // title and have it link to the new section. Otherwise, respect the summary as
1619                                         // passed.
1620                                         if ( $this->summary === '' ) {
1621                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1622                                                 $this->summary = wfMessage( 'newsectionsummary' )
1623                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1624                                         }
1625                                 } elseif ( $this->summary !== '' ) {
1626                                         // Insert the section title above the content.
1627                                         $content = $content->addSectionHeader( $this->summary );
1628
1629                                         // Jump to the new section
1630                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1631
1632                                         // Create a link to the new section from the edit summary.
1633                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1634                                         $this->summary = wfMessage( 'newsectionsummary' )
1635                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1636                                 }
1637                         }
1638
1639                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1640
1641                 } else { # not $new
1642
1643                         # Article exists. Check for edit conflict.
1644
1645                         $this->mArticle->clear(); # Force reload of dates, etc.
1646                         $timestamp = $this->mArticle->getTimestamp();
1647
1648                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1649
1650                         if ( $timestamp != $this->edittime ) {
1651                                 $this->isConflict = true;
1652                                 if ( $this->section == 'new' ) {
1653                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1654                                                 $this->mArticle->getComment() == $this->summary ) {
1655                                                 // Probably a duplicate submission of a new comment.
1656                                                 // This can happen when squid resends a request after
1657                                                 // a timeout but the first one actually went through.
1658                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1659                                         } else {
1660                                                 // New comment; suppress conflict.
1661                                                 $this->isConflict = false;
1662                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1663                                         }
1664                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1665                                                         $wgUser->getId(), $this->edittime ) ) {
1666                                         # Suppress edit conflict with self, except for section edits where merging is required.
1667                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1668                                         $this->isConflict = false;
1669                                 }
1670                         }
1671
1672                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1673                         if ( $this->sectiontitle !== '' ) {
1674                                 $sectionTitle = $this->sectiontitle;
1675                         } else {
1676                                 $sectionTitle = $this->summary;
1677                         }
1678
1679                         $content = null;
1680
1681                         if ( $this->isConflict ) {
1682                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1683                                                 . " (article time '{$timestamp}')\n" );
1684
1685                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1686                         } else {
1687                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1688                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1689                         }
1690
1691                         if ( is_null( $content ) ) {
1692                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1693                                 $this->isConflict = true;
1694                                 $content = $textbox_content; // do not try to merge here!
1695                         } elseif ( $this->isConflict ) {
1696                                 # Attempt merge
1697                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1698                                         // Successful merge! Maybe we should tell the user the good news?
1699                                         $this->isConflict = false;
1700                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1701                                 } else {
1702                                         $this->section = '';
1703                                         $this->textbox1 = ContentHandler::getContentText( $content );
1704                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1705                                 }
1706                         }
1707
1708                         if ( $this->isConflict ) {
1709                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1710                                 wfProfileOut( __METHOD__ );
1711                                 return $status;
1712                         }
1713
1714                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1715                                 wfProfileOut( __METHOD__ );
1716                                 return $status;
1717                         }
1718
1719                         if ( $this->section == 'new' ) {
1720                                 // Handle the user preference to force summaries here
1721                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1722                                         $this->missingSummary = true;
1723                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1724                                         $status->value = self::AS_SUMMARY_NEEDED;
1725                                         wfProfileOut( __METHOD__ );
1726                                         return $status;
1727                                 }
1728
1729                                 // Do not allow the user to post an empty comment
1730                                 if ( $this->textbox1 == '' ) {
1731                                         $this->missingComment = true;
1732                                         $status->fatal( 'missingcommenttext' );
1733                                         $status->value = self::AS_TEXTBOX_EMPTY;
1734                                         wfProfileOut( __METHOD__ );
1735                                         return $status;
1736                                 }
1737                         } elseif ( !$this->allowBlankSummary
1738                                 && !$content->equals( $this->getOriginalContent() )
1739                                 && !$content->isRedirect()
1740                                 && md5( $this->summary ) == $this->autoSumm
1741                         ) {
1742                                 $this->missingSummary = true;
1743                                 $status->fatal( 'missingsummary' );
1744                                 $status->value = self::AS_SUMMARY_NEEDED;
1745                                 wfProfileOut( __METHOD__ );
1746                                 return $status;
1747                         }
1748
1749                         # All's well
1750                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1751                         $sectionanchor = '';
1752                         if ( $this->section == 'new' ) {
1753                                 if ( $this->sectiontitle !== '' ) {
1754                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1755                                         // If no edit summary was specified, create one automatically from the section
1756                                         // title and have it link to the new section. Otherwise, respect the summary as
1757                                         // passed.
1758                                         if ( $this->summary === '' ) {
1759                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1760                                                 $this->summary = wfMessage( 'newsectionsummary' )
1761                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1762                                         }
1763                                 } elseif ( $this->summary !== '' ) {
1764                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1765                                         # This is a new section, so create a link to the new section
1766                                         # in the revision summary.
1767                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1768                                         $this->summary = wfMessage( 'newsectionsummary' )
1769                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1770                                 }
1771                         } elseif ( $this->section != '' ) {
1772                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1773                                 # XXX: might be better to integrate this into Article::replaceSection
1774                                 # for duplicate heading checking and maybe parsing
1775                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1776                                 # we can't deal with anchors, includes, html etc in the header for now,
1777                                 # headline would need to be parsed to improve this
1778                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1779                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1780                                 }
1781                         }
1782                         $result['sectionanchor'] = $sectionanchor;
1783                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1784
1785                         // Save errors may fall down to the edit form, but we've now
1786                         // merged the section into full text. Clear the section field
1787                         // so that later submission of conflict forms won't try to
1788                         // replace that into a duplicated mess.
1789                         $this->textbox1 = $this->toEditText( $content );
1790                         $this->section = '';
1791
1792                         $status->value = self::AS_SUCCESS_UPDATE;
1793                 }
1794
1795                 // Check for length errors again now that the section is merged in
1796                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1797                 if ( $this->kblength > $wgMaxArticleSize ) {
1798                         $this->tooBig = true;
1799                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1800                         wfProfileOut( __METHOD__ );
1801                         return $status;
1802                 }
1803
1804                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1805                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1806                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1807                         ( $bot ? EDIT_FORCE_BOT : 0 );
1808
1809                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1810                                                                                                                         false, null, $this->contentFormat );
1811
1812                 if ( !$doEditStatus->isOK() ) {
1813                         // Failure from doEdit()
1814                         // Show the edit conflict page for certain recognized errors from doEdit(),
1815                         // but don't show it for errors from extension hooks
1816                         $errors = $doEditStatus->getErrorsArray();
1817                         if ( in_array( $errors[0][0],
1818                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1819                         ) {
1820                                 $this->isConflict = true;
1821                                 // Destroys data doEdit() put in $status->value but who cares
1822                                 $doEditStatus->value = self::AS_END;
1823                         }
1824                         wfProfileOut( __METHOD__ );
1825                         return $doEditStatus;
1826                 }
1827
1828                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1829                 if ( $result['nullEdit'] ) {
1830                         // We don't know if it was a null edit until now, so increment here
1831                         $wgUser->pingLimiter( 'linkpurge' );
1832                 }
1833                 $result['redirect'] = $content->isRedirect();
1834                 $this->updateWatchlist();
1835                 wfProfileOut( __METHOD__ );
1836                 return $status;
1837         }
1838
1839         /**
1840          * Register the change of watch status
1841          */
1842         protected function updateWatchlist() {
1843                 global $wgUser;
1844
1845                 if ( $wgUser->isLoggedIn()
1846                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1847                 ) {
1848                         $fname = __METHOD__;
1849                         $title = $this->mTitle;
1850                         $watch = $this->watchthis;
1851
1852                         // Do this in its own transaction to reduce contention...
1853                         $dbw = wfGetDB( DB_MASTER );
1854                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1855                                 $dbw->begin( $fname );
1856                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1857                                 $dbw->commit( $fname );
1858                         } );
1859                 }
1860         }
1861
1862         /**
1863          * Attempts to merge text content with base and current revisions
1864          *
1865          * @param $editText string
1866          *
1867          * @return bool
1868          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1869          */
1870         function mergeChangesInto( &$editText ) {
1871                 ContentHandler::deprecated( __METHOD__, "1.21" );
1872
1873                 $editContent = $this->toEditContent( $editText );
1874
1875                 $ok = $this->mergeChangesIntoContent( $editContent );
1876
1877                 if ( $ok ) {
1878                         $editText = $this->toEditText( $editContent );
1879                         return true;
1880                 }
1881                 return false;
1882         }
1883
1884         /**
1885          * Attempts to do 3-way merge of edit content with a base revision
1886          * and current content, in case of edit conflict, in whichever way appropriate
1887          * for the content type.
1888          *
1889          * @since 1.21
1890          *
1891          * @param $editContent
1892          *
1893          * @return bool
1894          */
1895         private function mergeChangesIntoContent( &$editContent ) {
1896                 wfProfileIn( __METHOD__ );
1897
1898                 $db = wfGetDB( DB_MASTER );
1899
1900                 // This is the revision the editor started from
1901                 $baseRevision = $this->getBaseRevision();
1902                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1903
1904                 if ( is_null( $baseContent ) ) {
1905                         wfProfileOut( __METHOD__ );
1906                         return false;
1907                 }
1908
1909                 // The current state, we want to merge updates into it
1910                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1911                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1912
1913                 if ( is_null( $currentContent ) ) {
1914                         wfProfileOut( __METHOD__ );
1915                         return false;
1916                 }
1917
1918                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1919
1920                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1921
1922                 if ( $result ) {
1923                         $editContent = $result;
1924                         wfProfileOut( __METHOD__ );
1925                         return true;
1926                 }
1927
1928                 wfProfileOut( __METHOD__ );
1929                 return false;
1930         }
1931
1932         /**
1933          * @return Revision
1934          */
1935         function getBaseRevision() {
1936                 if ( !$this->mBaseRevision ) {
1937                         $db = wfGetDB( DB_MASTER );
1938                         $this->mBaseRevision = Revision::loadFromTimestamp(
1939                                 $db, $this->mTitle, $this->edittime );
1940                 }
1941                 return $this->mBaseRevision;
1942         }
1943
1944         /**
1945          * Check given input text against $wgSpamRegex, and return the text of the first match.
1946          *
1947          * @param $text string
1948          *
1949          * @return string|bool matching string or false
1950          */
1951         public static function matchSpamRegex( $text ) {
1952                 global $wgSpamRegex;
1953                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1954                 $regexes = (array)$wgSpamRegex;
1955                 return self::matchSpamRegexInternal( $text, $regexes );
1956         }
1957
1958         /**
1959          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
1960          *
1961          * @param $text string
1962          *
1963          * @return string|bool matching string or false
1964          */
1965         public static function matchSummarySpamRegex( $text ) {
1966                 global $wgSummarySpamRegex;
1967                 $regexes = (array)$wgSummarySpamRegex;
1968                 return self::matchSpamRegexInternal( $text, $regexes );
1969         }
1970
1971         /**
1972          * @param $text string
1973          * @param $regexes array
1974          * @return bool|string
1975          */
1976         protected static function matchSpamRegexInternal( $text, $regexes ) {
1977                 foreach ( $regexes as $regex ) {
1978                         $matches = array();
1979                         if ( preg_match( $regex, $text, $matches ) ) {
1980                                 return $matches[0];
1981                         }
1982                 }
1983                 return false;
1984         }
1985
1986         function setHeaders() {
1987                 global $wgOut, $wgUser;
1988
1989                 $wgOut->addModules( 'mediawiki.action.edit' );
1990                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
1991
1992                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1993                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1994                 }
1995
1996                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
1997                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
1998                 }
1999
2000                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2001
2002                 # Enabled article-related sidebar, toplinks, etc.
2003                 $wgOut->setArticleRelated( true );
2004
2005                 $contextTitle = $this->getContextTitle();
2006                 if ( $this->isConflict ) {
2007                         $msg = 'editconflict';
2008                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2009                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2010                 } else {
2011                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
2012                                 'editing' : 'creating';
2013                 }
2014                 # Use the title defined by DISPLAYTITLE magic word when present
2015                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2016                 if ( $displayTitle === false ) {
2017                         $displayTitle = $contextTitle->getPrefixedText();
2018                 }
2019                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2020         }
2021
2022         /**
2023          * Show all applicable editing introductions
2024          */
2025         protected function showIntro() {
2026                 global $wgOut, $wgUser;
2027                 if ( $this->suppressIntro ) {
2028                         return;
2029                 }
2030
2031                 $namespace = $this->mTitle->getNamespace();
2032
2033                 if ( $namespace == NS_MEDIAWIKI ) {
2034                         # Show a warning if editing an interface message
2035                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2036                 } elseif ( $namespace == NS_FILE ) {
2037                         # Show a hint to shared repo
2038                         $file = wfFindFile( $this->mTitle );
2039                         if ( $file && !$file->isLocal() ) {
2040                                 $descUrl = $file->getDescriptionUrl();
2041                                 # there must be a description url to show a hint to shared repo
2042                                 if ( $descUrl ) {
2043                                         if ( !$this->mTitle->exists() ) {
2044                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2045                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2046                                                 ) );
2047                                         } else {
2048                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2049                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2050                                                 ) );
2051                                         }
2052                                 }
2053                         }
2054                 }
2055
2056                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2057                 # Show log extract when the user is currently blocked
2058                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2059                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2060                         $username = $parts[0];
2061                         $user = User::newFromName( $username, false /* allow IP users*/ );
2062                         $ip = User::isIP( $username );
2063                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2064                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2065                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2066                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
2067                                 LogEventsList::showLogExtract(
2068                                         $wgOut,
2069                                         'block',
2070                                         $user->getUserPage(),
2071                                         '',
2072                                         array(
2073                                                 'lim' => 1,
2074                                                 'showIfEmpty' => false,
2075                                                 'msgKey' => array(
2076                                                         'blocked-notice-logextract',
2077                                                         $user->getName() # Support GENDER in notice
2078                                                 )
2079                                         )
2080                                 );
2081                         }
2082                 }
2083                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2084                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2085                         if ( $wgUser->isLoggedIn() ) {
2086                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
2087                         } else {
2088                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
2089                         }
2090                 }
2091                 # Give a notice if the user is editing a deleted/moved page...
2092                 if ( !$this->mTitle->exists() ) {
2093                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2094                                 '',
2095                                 array(
2096                                         'lim' => 10,
2097                                         'conds' => array( "log_action != 'revision'" ),
2098                                         'showIfEmpty' => false,
2099                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2100                                 )
2101                         );
2102                 }
2103         }
2104
2105         /**
2106          * Attempt to show a custom editing introduction, if supplied
2107          *
2108          * @return bool
2109          */
2110         protected function showCustomIntro() {
2111                 if ( $this->editintro ) {
2112                         $title = Title::newFromText( $this->editintro );
2113                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2114                                 global $wgOut;
2115                                 // Added using template syntax, to take <noinclude>'s into account.
2116                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2117                                 return true;
2118                         }
2119                 }
2120                 return false;
2121         }
2122
2123         /**
2124          * Gets an editable textual representation of $content.
2125          * The textual representation can be turned by into a Content object by the
2126          * toEditContent() method.
2127          *
2128          * If $content is null or false or a string, $content is returned unchanged.
2129          *
2130          * If the given Content object is not of a type that can be edited using the text base EditPage,
2131          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2132          * content.
2133          *
2134          * @param Content|null|bool|string $content
2135          * @return String the editable text form of the content.
2136          *
2137          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
2138          */
2139         protected function toEditText( $content ) {
2140                 if ( $content === null || $content === false ) {
2141                         return $content;
2142                 }
2143
2144                 if ( is_string( $content ) ) {
2145                         return $content;
2146                 }
2147
2148                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2149                         throw new MWException( 'This content model is not supported: '
2150                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2151                 }
2152
2153                 return $content->serialize( $this->contentFormat );
2154         }
2155
2156         /**
2157          * Turns the given text into a Content object by unserializing it.
2158          *
2159          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2160          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2161          * content.
2162          *
2163          * @param string|null|bool $text Text to unserialize
2164          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2165          *                 returned instead.
2166          *
2167          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2168          *          and $this->allowNonTextContent is not true.
2169          */
2170         protected function toEditContent( $text ) {
2171                 if ( $text === false || $text === null ) {
2172                         return $text;
2173                 }
2174
2175                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2176                         $this->contentModel, $this->contentFormat );
2177
2178                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2179                         throw new MWException( 'This content model is not supported: '
2180                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2181                 }
2182
2183                 return $content;
2184         }
2185
2186         /**
2187          * Send the edit form and related headers to $wgOut
2188          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2189          *     during form output near the top, for captchas and the like.
2190          */
2191         function showEditForm( $formCallback = null ) {
2192                 global $wgOut, $wgUser;
2193
2194                 wfProfileIn( __METHOD__ );
2195
2196                 # need to parse the preview early so that we know which templates are used,
2197                 # otherwise users with "show preview after edit box" will get a blank list
2198                 # we parse this near the beginning so that setHeaders can do the title
2199                 # setting work instead of leaving it in getPreviewText
2200                 $previewOutput = '';
2201                 if ( $this->formtype == 'preview' ) {
2202                         $previewOutput = $this->getPreviewText();
2203                 }
2204
2205                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2206
2207                 $this->setHeaders();
2208
2209                 if ( $this->showHeader() === false ) {
2210                         wfProfileOut( __METHOD__ );
2211                         return;
2212                 }
2213
2214                 $wgOut->addHTML( $this->editFormPageTop );
2215
2216                 if ( $wgUser->getOption( 'previewontop' ) ) {
2217                         $this->displayPreviewArea( $previewOutput, true );
2218                 }
2219
2220                 $wgOut->addHTML( $this->editFormTextTop );
2221
2222                 $showToolbar = true;
2223                 if ( $this->wasDeletedSinceLastEdit() ) {
2224                         if ( $this->formtype == 'save' ) {
2225                                 // Hide the toolbar and edit area, user can click preview to get it back
2226                                 // Add an confirmation checkbox and explanation.
2227                                 $showToolbar = false;
2228                         } else {
2229                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2230                                         'deletedwhileediting' );
2231                         }
2232                 }
2233
2234                 // @todo add EditForm plugin interface and use it here!
2235                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2236                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2237                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2238                         'enctype' => 'multipart/form-data' ) ) );
2239
2240                 if ( is_callable( $formCallback ) ) {
2241                         call_user_func_array( $formCallback, array( &$wgOut ) );
2242                 }
2243
2244                 // Add an empty field to trip up spambots
2245                 $wgOut->addHTML(
2246                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2247                         . Html::rawElement( 'label', array( 'for' => 'wpAntiSpam' ), wfMessage( 'simpleantispam-label' )->parse() )
2248                         . Xml::element( 'input', array( 'type' => 'text', 'name' => 'wpAntispam', 'id' => 'wpAntispam', 'value' => '' ) )
2249                         . Xml::closeElement( 'div' )
2250                 );
2251
2252                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2253
2254                 // Put these up at the top to ensure they aren't lost on early form submission
2255                 $this->showFormBeforeText();
2256
2257                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2258                         $username = $this->lastDelete->user_name;
2259                         $comment = $this->lastDelete->log_comment;
2260
2261                         // It is better to not parse the comment at all than to have templates expanded in the middle
2262                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2263                         $key = $comment === ''
2264                                 ? 'confirmrecreate-noreason'
2265                                 : 'confirmrecreate';
2266                         $wgOut->addHTML(
2267                                 '<div class="mw-confirm-recreate">' .
2268                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2269                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2270                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2271                                 ) .
2272                                 '</div>'
2273                         );
2274                 }
2275
2276                 # When the summary is hidden, also hide them on preview/show changes
2277                 if ( $this->nosummary ) {
2278                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2279                 }
2280
2281                 # If a blank edit summary was previously provided, and the appropriate
2282                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2283                 # user being bounced back more than once in the event that a summary
2284                 # is not required.
2285                 #####
2286                 # For a bit more sophisticated detection of blank summaries, hash the
2287                 # automatic one and pass that in the hidden field wpAutoSummary.
2288                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2289                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2290                 }
2291
2292                 if ( $this->undidRev ) {
2293                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2294                 }
2295
2296                 if ( $this->hasPresetSummary ) {
2297                         // If a summary has been preset using &summary= we don't want to prompt for
2298                         // a different summary. Only prompt for a summary if the summary is blanked.
2299                         // (Bug 17416)
2300                         $this->autoSumm = md5( '' );
2301                 }
2302
2303                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2304                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2305
2306                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2307
2308                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2309                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2310
2311                 if ( $this->section == 'new' ) {
2312                         $this->showSummaryInput( true, $this->summary );
2313                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2314                 }
2315
2316                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2317
2318                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2319                         $wgOut->addHTML( EditPage::getEditToolbar() );
2320                 }
2321
2322                 if ( $this->isConflict ) {
2323                         // In an edit conflict bypass the overridable content form method
2324                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2325                         // resolved between page source edits and custom ui edits using the
2326                         // custom edit ui.
2327                         $this->textbox2 = $this->textbox1;
2328
2329                         $content = $this->getCurrentContent();
2330                         $this->textbox1 = $this->toEditText( $content );
2331
2332                         $this->showTextbox1();
2333                 } else {
2334                         $this->showContentForm();
2335                 }
2336
2337                 $wgOut->addHTML( $this->editFormTextAfterContent );
2338
2339                 $this->showStandardInputs();
2340
2341                 $this->showFormAfterText();
2342
2343                 $this->showTosSummary();
2344
2345                 $this->showEditTools();
2346
2347                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2348
2349                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2350                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2351
2352                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2353                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2354
2355                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2356                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2357
2358                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2359
2360                 if ( $this->isConflict ) {
2361                         try {
2362                                 $this->showConflict();
2363                         } catch ( MWContentSerializationException $ex ) {
2364                                 // this can't really happen, but be nice if it does.
2365                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2366                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2367                         }
2368                 }
2369
2370                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2371
2372                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2373                         $this->displayPreviewArea( $previewOutput, false );
2374                 }
2375
2376                 wfProfileOut( __METHOD__ );
2377         }
2378
2379         /**
2380          * Extract the section title from current section text, if any.
2381          *
2382          * @param string $text
2383          * @return Mixed|string or false
2384          */
2385         public static function extractSectionTitle( $text ) {
2386                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2387                 if ( !empty( $matches[2] ) ) {
2388                         global $wgParser;
2389                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2390                 } else {
2391                         return false;
2392                 }
2393         }
2394
2395         protected function showHeader() {
2396                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2397
2398                 if ( $this->mTitle->isTalkPage() ) {
2399                         $wgOut->addWikiMsg( 'talkpagetext' );
2400                 }
2401
2402                 // Add edit notices
2403                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2404
2405                 if ( $this->isConflict ) {
2406                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2407                         $this->edittime = $this->mArticle->getTimestamp();
2408                 } else {
2409                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2410                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2411                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2412                                 // Someone is welcome to try refactoring though
2413                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2414                                 return false;
2415                         }
2416
2417                         if ( $this->section != '' && $this->section != 'new' ) {
2418                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2419                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2420                                         if ( $sectionTitle !== false ) {
2421                                                 $this->summary = "/* $sectionTitle */ ";
2422                                         }
2423                                 }
2424                         }
2425
2426                         if ( $this->missingComment ) {
2427                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2428                         }
2429
2430                         if ( $this->missingSummary && $this->section != 'new' ) {
2431                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2432                         }
2433
2434                         if ( $this->missingSummary && $this->section == 'new' ) {
2435                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2436                         }
2437
2438                         if ( $this->hookError !== '' ) {
2439                                 $wgOut->addWikiText( $this->hookError );
2440                         }
2441
2442                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2443                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2444                         }
2445
2446                         if ( $this->section != 'new' ) {
2447                                 $revision = $this->mArticle->getRevisionFetched();
2448                                 if ( $revision ) {
2449                                         // Let sysop know that this will make private content public if saved
2450
2451                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2452                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2453                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2454                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2455                                         }
2456
2457                                         if ( !$revision->isCurrent() ) {
2458                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2459                                                 $wgOut->addWikiMsg( 'editingold' );
2460                                         }
2461                                 } elseif ( $this->mTitle->exists() ) {
2462                                         // Something went wrong
2463
2464                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2465                                                 array( 'missing-revision', $this->oldid ) );
2466                                 }
2467                         }
2468                 }
2469
2470                 if ( wfReadOnly() ) {
2471                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2472                 } elseif ( $wgUser->isAnon() ) {
2473                         if ( $this->formtype != 'preview' ) {
2474                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2475                         } else {
2476                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2477                         }
2478                 } else {
2479                         if ( $this->isCssJsSubpage ) {
2480                                 # Check the skin exists
2481                                 if ( $this->isWrongCaseCssJsPage ) {
2482                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2483                                 }
2484                                 if ( $this->formtype !== 'preview' ) {
2485                                         if ( $this->isCssSubpage ) {
2486                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2487                                         }
2488
2489                                         if ( $this->isJsSubpage ) {
2490                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2491                                         }
2492                                 }
2493                         }
2494                 }
2495
2496                 if ( $this->mTitle->isProtected( 'edit' ) &&
2497                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2498                 ) {
2499                         # Is the title semi-protected?
2500                         if ( $this->mTitle->isSemiProtected() ) {
2501                                 $noticeMsg = 'semiprotectedpagewarning';
2502                         } else {
2503                                 # Then it must be protected based on static groups (regular)
2504                                 $noticeMsg = 'protectedpagewarning';
2505                         }
2506                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2507                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2508                 }
2509                 if ( $this->mTitle->isCascadeProtected() ) {
2510                         # Is this page under cascading protection from some source pages?
2511                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2512                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2513                         $cascadeSourcesCount = count( $cascadeSources );
2514                         if ( $cascadeSourcesCount > 0 ) {
2515                                 # Explain, and list the titles responsible
2516                                 foreach ( $cascadeSources as $page ) {
2517                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2518                                 }
2519                         }
2520                         $notice .= '</div>';
2521                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2522                 }
2523                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2524                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2525                                 array( 'lim' => 1,
2526                                         'showIfEmpty' => false,
2527                                         'msgKey' => array( 'titleprotectedwarning' ),
2528                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2529                 }
2530
2531                 if ( $this->kblength === false ) {
2532                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2533                 }
2534
2535                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2536                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2537                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2538                 } else {
2539                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2540                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2541                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2542                                 );
2543                         }
2544                 }
2545                 # Add header copyright warning
2546                 $this->showHeaderCopyrightWarning();
2547         }
2548
2549         /**
2550          * Standard summary input and label (wgSummary), abstracted so EditPage
2551          * subclasses may reorganize the form.
2552          * Note that you do not need to worry about the label's for=, it will be
2553          * inferred by the id given to the input. You can remove them both by
2554          * passing array( 'id' => false ) to $userInputAttrs.
2555          *
2556          * @param string $summary The value of the summary input
2557          * @param string $labelText The html to place inside the label
2558          * @param array $inputAttrs of attrs to use on the input
2559          * @param array $spanLabelAttrs of attrs to use on the span inside the label
2560          *
2561          * @return array An array in the format array( $label, $input )
2562          */
2563         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2564                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2565                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2566                         'id' => 'wpSummary',
2567                         'maxlength' => '200',
2568                         'tabindex' => '1',
2569                         'size' => 60,
2570                         'spellcheck' => 'true',
2571                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2572
2573                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2574                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2575                         'id' => "wpSummaryLabel"
2576                 );
2577
2578                 $label = null;
2579                 if ( $labelText ) {
2580                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2581                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2582                 }
2583
2584                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2585
2586                 return array( $label, $input );
2587         }
2588
2589         /**
2590          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2591          *                          up top, or false if this is the comment summary
2592          *                          down below the textarea
2593          * @param string $summary The text of the summary to display
2594          * @return String
2595          */
2596         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2597                 global $wgOut, $wgContLang;
2598                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2599                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2600                 if ( $isSubjectPreview ) {
2601                         if ( $this->nosummary ) {
2602                                 return;
2603                         }
2604                 } else {
2605                         if ( !$this->mShowSummaryField ) {
2606                                 return;
2607                         }
2608                 }
2609                 $summary = $wgContLang->recodeForEdit( $summary );
2610                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2611                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2612                 $wgOut->addHTML( "{$label} {$input}" );
2613         }
2614
2615         /**
2616          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2617          *                          up top, or false if this is the comment summary
2618          *                          down below the textarea
2619          * @param string $summary the text of the summary to display
2620          * @return String
2621          */
2622         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2623                 // avoid spaces in preview, gets always trimmed on save
2624                 $summary = trim( $summary );
2625                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2626                         return "";
2627                 }
2628
2629                 global $wgParser;
2630
2631                 if ( $isSubjectPreview ) {
2632                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2633                                 ->inContentLanguage()->text();
2634                 }
2635
2636                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2637
2638                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2639                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2640         }
2641
2642         protected function showFormBeforeText() {
2643                 global $wgOut;
2644                 $section = htmlspecialchars( $this->section );
2645                 $wgOut->addHTML( <<<HTML
2646 <input type='hidden' value="{$section}" name="wpSection" />
2647 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2648 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2649 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2650
2651 HTML
2652                 );
2653                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2654                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2655                 }
2656         }
2657
2658         protected function showFormAfterText() {
2659                 global $wgOut, $wgUser;
2660                 /**
2661                  * To make it harder for someone to slip a user a page
2662                  * which submits an edit form to the wiki without their
2663                  * knowledge, a random token is associated with the login
2664                  * session. If it's not passed back with the submission,
2665                  * we won't save the page, or render user JavaScript and
2666                  * CSS previews.
2667                  *
2668                  * For anon editors, who may not have a session, we just
2669                  * include the constant suffix to prevent editing from
2670                  * broken text-mangling proxies.
2671                  */
2672                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2673         }
2674
2675         /**
2676          * Subpage overridable method for printing the form for page content editing
2677          * By default this simply outputs wpTextbox1
2678          * Subclasses can override this to provide a custom UI for editing;
2679          * be it a form, or simply wpTextbox1 with a modified content that will be
2680          * reverse modified when extracted from the post data.
2681          * Note that this is basically the inverse for importContentFormData
2682          */
2683         protected function showContentForm() {
2684                 $this->showTextbox1();
2685         }
2686
2687         /**
2688          * Method to output wpTextbox1
2689          * The $textoverride method can be used by subclasses overriding showContentForm
2690          * to pass back to this method.
2691          *
2692          * @param array $customAttribs of html attributes to use in the textarea
2693          * @param string $textoverride optional text to override $this->textarea1 with
2694          */
2695         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2696                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2697                         $attribs = array( 'style' => 'display:none;' );
2698                 } else {
2699                         $classes = array(); // Textarea CSS
2700                         if ( $this->mTitle->isProtected( 'edit' ) &&
2701                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2702                         ) {
2703                                 # Is the title semi-protected?
2704                                 if ( $this->mTitle->isSemiProtected() ) {
2705                                         $classes[] = 'mw-textarea-sprotected';
2706                                 } else {
2707                                         # Then it must be protected based on static groups (regular)
2708                                         $classes[] = 'mw-textarea-protected';
2709                                 }
2710                                 # Is the title cascade-protected?
2711                                 if ( $this->mTitle->isCascadeProtected() ) {
2712                                         $classes[] = 'mw-textarea-cprotected';
2713                                 }
2714                         }
2715
2716                         $attribs = array( 'tabindex' => 1 );
2717
2718                         if ( is_array( $customAttribs ) ) {
2719                                 $attribs += $customAttribs;
2720                         }
2721
2722                         if ( count( $classes ) ) {
2723                                 if ( isset( $attribs['class'] ) ) {
2724                                         $classes[] = $attribs['class'];
2725                                 }
2726                                 $attribs['class'] = implode( ' ', $classes );
2727                         }
2728                 }
2729
2730                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2731         }
2732
2733         protected function showTextbox2() {
2734                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2735         }
2736
2737         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2738                 global $wgOut, $wgUser;
2739
2740                 $wikitext = $this->safeUnicodeOutput( $text );
2741                 if ( strval( $wikitext ) !== '' ) {
2742                         // Ensure there's a newline at the end, otherwise adding lines
2743                         // is awkward.
2744                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2745                         // mode will show an extra newline. A bit annoying.
2746                         $wikitext .= "\n";
2747                 }
2748
2749                 $attribs = $customAttribs + array(
2750                         'accesskey' => ',',
2751                         'id' => $name,
2752                         'cols' => $wgUser->getIntOption( 'cols' ),
2753                         'rows' => $wgUser->getIntOption( 'rows' ),
2754                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2755                 );
2756
2757                 $pageLang = $this->mTitle->getPageLanguage();
2758                 $attribs['lang'] = $pageLang->getCode();
2759                 $attribs['dir'] = $pageLang->getDir();
2760
2761                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2762         }
2763
2764         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2765                 global $wgOut;
2766                 $classes = array();
2767                 if ( $isOnTop ) {
2768                         $classes[] = 'ontop';
2769                 }
2770
2771                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2772
2773                 if ( $this->formtype != 'preview' ) {
2774                         $attribs['style'] = 'display: none;';
2775                 }
2776
2777                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2778
2779                 if ( $this->formtype == 'preview' ) {
2780                         $this->showPreview( $previewOutput );
2781                 }
2782
2783                 $wgOut->addHTML( '</div>' );
2784
2785                 if ( $this->formtype == 'diff' ) {
2786                         try {
2787                                 $this->showDiff();
2788                         } catch ( MWContentSerializationException $ex ) {
2789                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2790                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2791                         }
2792                 }
2793         }
2794
2795         /**
2796          * Append preview output to $wgOut.
2797          * Includes category rendering if this is a category page.
2798          *
2799          * @param string $text the HTML to be output for the preview.
2800          */
2801         protected function showPreview( $text ) {
2802                 global $wgOut;
2803                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2804                         $this->mArticle->openShowCategory();
2805                 }
2806                 # This hook seems slightly odd here, but makes things more
2807                 # consistent for extensions.
2808                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2809                 $wgOut->addHTML( $text );
2810                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2811                         $this->mArticle->closeShowCategory();
2812                 }
2813         }
2814
2815         /**
2816          * Get a diff between the current contents of the edit box and the
2817          * version of the page we're editing from.
2818          *
2819          * If this is a section edit, we'll replace the section as for final
2820          * save and then make a comparison.
2821          */
2822         function showDiff() {
2823                 global $wgUser, $wgContLang, $wgOut;
2824
2825                 $oldtitlemsg = 'currentrev';
2826                 # if message does not exist, show diff against the preloaded default
2827                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2828                         $oldtext = $this->mTitle->getDefaultMessageText();
2829                         if ( $oldtext !== false ) {
2830                                 $oldtitlemsg = 'defaultmessagetext';
2831                                 $oldContent = $this->toEditContent( $oldtext );
2832                         } else {
2833                                 $oldContent = null;
2834                         }
2835                 } else {
2836                         $oldContent = $this->getCurrentContent();
2837                 }
2838
2839                 $textboxContent = $this->toEditContent( $this->textbox1 );
2840
2841                 $newContent = $this->mArticle->replaceSectionContent(
2842                                                         $this->section, $textboxContent,
2843                                                         $this->summary, $this->edittime );
2844
2845                 if ( $newContent ) {
2846                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2847                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2848
2849                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2850                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2851                 }
2852
2853                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2854                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2855                         $newtitle = wfMessage( 'yourtext' )->parse();
2856
2857                         if ( !$oldContent ) {
2858                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2859                         }
2860
2861                         if ( !$newContent ) {
2862                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2863                         }
2864
2865                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2866                         $de->setContent( $oldContent, $newContent );
2867
2868                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2869                         $de->showDiffStyle();
2870                 } else {
2871                         $difftext = '';
2872                 }
2873
2874                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2875         }
2876
2877         /**
2878          * Show the header copyright warning.
2879          */
2880         protected function showHeaderCopyrightWarning() {
2881                 $msg = 'editpage-head-copy-warn';
2882                 if ( !wfMessage( $msg )->isDisabled() ) {
2883                         global $wgOut;
2884                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2885                                 'editpage-head-copy-warn' );
2886                 }
2887         }
2888
2889         /**
2890          * Give a chance for site and per-namespace customizations of
2891          * terms of service summary link that might exist separately
2892          * from the copyright notice.
2893          *
2894          * This will display between the save button and the edit tools,
2895          * so should remain short!
2896          */
2897         protected function showTosSummary() {
2898                 $msg = 'editpage-tos-summary';
2899                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2900                 if ( !wfMessage( $msg )->isDisabled() ) {
2901                         global $wgOut;
2902                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2903                         $wgOut->addWikiMsg( $msg );
2904                         $wgOut->addHTML( '</div>' );
2905                 }
2906         }
2907
2908         protected function showEditTools() {
2909                 global $wgOut;
2910                 $wgOut->addHTML( '<div class="mw-editTools">' .
2911                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2912                         '</div>' );
2913         }
2914
2915         /**
2916          * Get the copyright warning
2917          *
2918          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2919          */
2920         protected function getCopywarn() {
2921                 return self::getCopyrightWarning( $this->mTitle );
2922         }
2923
2924         /**
2925          * Get the copyright warning, by default returns wikitext
2926          *
2927          * @param Title $title
2928          * @param string $format output format, valid values are any function of
2929          *                       a Message object
2930          * @return string
2931          */
2932         public static function getCopyrightWarning( $title, $format = 'plain' ) {
2933                 global $wgRightsText;
2934                 if ( $wgRightsText ) {
2935                         $copywarnMsg = array( 'copyrightwarning',
2936                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2937                                 $wgRightsText );
2938                 } else {
2939                         $copywarnMsg = array( 'copyrightwarning2',
2940                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2941                 }
2942                 // Allow for site and per-namespace customization of contribution/copyright notice.
2943                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2944
2945                 return "<div id=\"editpage-copywarn\">\n" .
2946                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
2947         }
2948
2949         /**
2950          * Get the Limit report for page previews
2951          *
2952          * @since 1.22
2953          * @param ParserOutput $output ParserOutput object from the parse
2954          * @return string HTML
2955          */
2956         public static function getPreviewLimitReport( $output ) {
2957                 if ( !$output || !$output->getLimitReportData() ) {
2958                         return '';
2959                 }
2960
2961                 wfProfileIn( __METHOD__ );
2962
2963                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
2964                         wfMessage( 'limitreport-title' )->parseAsBlock()
2965                 );
2966
2967                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
2968                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
2969
2970                 $limitReport .= Html::openElement( 'table', array(
2971                         'class' => 'preview-limit-report wikitable'
2972                 ) ) .
2973                         Html::openElement( 'tbody' );
2974
2975                 foreach ( $output->getLimitReportData() as $key => $value ) {
2976                         if ( wfRunHooks( 'ParserLimitReportFormat',
2977                                 array( $key, &$value, &$limitReport, true, true )
2978                         ) ) {
2979                                 $keyMsg = wfMessage( $key );
2980                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
2981                                 if ( !$valueMsg->exists() ) {
2982                                         $valueMsg = new RawMessage( '$1' );
2983                                 }
2984                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
2985                                         $limitReport .= Html::openElement( 'tr' ) .
2986                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
2987                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
2988                                                 Html::closeElement( 'tr' );
2989                                 }
2990                         }
2991                 }
2992
2993                 $limitReport .= Html::closeElement( 'tbody' ) .
2994                         Html::closeElement( 'table' ) .
2995                         Html::closeElement( 'div' );
2996
2997                 wfProfileOut( __METHOD__ );
2998
2999                 return $limitReport;
3000         }
3001
3002         protected function showStandardInputs( &$tabindex = 2 ) {
3003                 global $wgOut;
3004                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3005
3006                 if ( $this->section != 'new' ) {
3007                         $this->showSummaryInput( false, $this->summary );
3008                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3009                 }
3010
3011                 $checkboxes = $this->getCheckboxes( $tabindex,
3012                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3013                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3014
3015                 // Show copyright warning.
3016                 $wgOut->addWikiText( $this->getCopywarn() );
3017                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3018
3019                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3020                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3021
3022                 $cancel = $this->getCancelLink();
3023                 if ( $cancel !== '' ) {
3024                         $cancel .= Html::element( 'span',
3025                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3026                                 wfMessage( 'pipe-separator' )->text() );
3027                 }
3028                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
3029                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3030                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3031                         wfMessage( 'newwindow' )->parse();
3032                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3033                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3034                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3035                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3036                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3037         }
3038
3039         /**
3040          * Show an edit conflict. textbox1 is already shown in showEditForm().
3041          * If you want to use another entry point to this function, be careful.
3042          */
3043         protected function showConflict() {
3044                 global $wgOut;
3045
3046                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3047                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3048
3049                         $content1 = $this->toEditContent( $this->textbox1 );
3050                         $content2 = $this->toEditContent( $this->textbox2 );
3051
3052                         $handler = ContentHandler::getForModelID( $this->contentModel );
3053                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3054                         $de->setContent( $content2, $content1 );
3055                         $de->showDiff(
3056                                 wfMessage( 'yourtext' )->parse(),
3057                                 wfMessage( 'storedversion' )->text()
3058                         );
3059
3060                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3061                         $this->showTextbox2();
3062                 }
3063         }
3064
3065         /**
3066          * @return string
3067          */
3068         public function getCancelLink() {
3069                 $cancelParams = array();
3070                 if ( !$this->isConflict && $this->oldid > 0 ) {
3071                         $cancelParams['oldid'] = $this->oldid;
3072                 }
3073
3074                 return Linker::linkKnown(
3075                         $this->getContextTitle(),
3076                         wfMessage( 'cancel' )->parse(),
3077                         array( 'id' => 'mw-editform-cancel' ),
3078                         $cancelParams
3079                 );
3080         }
3081
3082         /**
3083          * Returns the URL to use in the form's action attribute.
3084          * This is used by EditPage subclasses when simply customizing the action
3085          * variable in the constructor is not enough. This can be used when the
3086          * EditPage lives inside of a Special page rather than a custom page action.
3087          *
3088          * @param $title Title object for which is being edited (where we go to for &action= links)
3089          * @return string
3090          */
3091         protected function getActionURL( Title $title ) {
3092                 return $title->getLocalURL( array( 'action' => $this->action ) );
3093         }
3094
3095         /**
3096          * Check if a page was deleted while the user was editing it, before submit.
3097          * Note that we rely on the logging table, which hasn't been always there,
3098          * but that doesn't matter, because this only applies to brand new
3099          * deletes.
3100          */
3101         protected function wasDeletedSinceLastEdit() {
3102                 if ( $this->deletedSinceEdit !== null ) {
3103                         return $this->deletedSinceEdit;
3104                 }
3105
3106                 $this->deletedSinceEdit = false;
3107
3108                 if ( $this->mTitle->isDeletedQuick() ) {
3109                         $this->lastDelete = $this->getLastDelete();
3110                         if ( $this->lastDelete ) {
3111                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3112                                 if ( $deleteTime > $this->starttime ) {
3113                                         $this->deletedSinceEdit = true;
3114                                 }
3115                         }
3116                 }
3117
3118                 return $this->deletedSinceEdit;
3119         }
3120
3121         protected function getLastDelete() {
3122                 $dbr = wfGetDB( DB_SLAVE );
3123                 $data = $dbr->selectRow(
3124                         array( 'logging', 'user' ),
3125                         array(
3126                                 'log_type',
3127                                 'log_action',
3128                                 'log_timestamp',
3129                                 'log_user',
3130                                 'log_namespace',
3131                                 'log_title',
3132                                 'log_comment',
3133                                 'log_params',
3134                                 'log_deleted',
3135                                 'user_name'
3136                         ), array(
3137                                 'log_namespace' => $this->mTitle->getNamespace(),
3138                                 'log_title' => $this->mTitle->getDBkey(),
3139                                 'log_type' => 'delete',
3140                                 'log_action' => 'delete',
3141                                 'user_id=log_user'
3142                         ),
3143                         __METHOD__,
3144                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3145                 );
3146                 // Quick paranoid permission checks...
3147                 if ( is_object( $data ) ) {
3148                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3149                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3150                         }
3151
3152                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3153                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3154                         }
3155                 }
3156                 return $data;
3157         }
3158
3159         /**
3160          * Get the rendered text for previewing.
3161          * @throws MWException
3162          * @return string
3163          */
3164         function getPreviewText() {
3165                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3166
3167                 wfProfileIn( __METHOD__ );
3168
3169                 if ( $wgRawHtml && !$this->mTokenOk ) {
3170                         // Could be an offsite preview attempt. This is very unsafe if
3171                         // HTML is enabled, as it could be an attack.
3172                         $parsedNote = '';
3173                         if ( $this->textbox1 !== '' ) {
3174                                 // Do not put big scary notice, if previewing the empty
3175                                 // string, which happens when you initially edit
3176                                 // a category page, due to automatic preview-on-open.
3177                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3178                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3179                         }
3180                         wfProfileOut( __METHOD__ );
3181                         return $parsedNote;
3182                 }
3183
3184                 $note = '';
3185
3186                 try {
3187                         $content = $this->toEditContent( $this->textbox1 );
3188
3189                         $previewHTML = '';
3190                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
3191                                 wfProfileOut( __METHOD__ );
3192                                 return $previewHTML;
3193                         }
3194
3195                         # provide a anchor link to the editform
3196                         $continueEditing = '<span class="mw-continue-editing">' .
3197                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3198                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3199                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3200                                 if ( $this->mTokenOkExceptSuffix ) {
3201                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3202
3203                                 } else {
3204                                         $note = wfMessage( 'session_fail_preview' )->plain();
3205                                 }
3206                         } elseif ( $this->incompleteForm ) {
3207                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3208                         } else {
3209                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3210                         }
3211
3212                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3213                         $parserOptions->setEditSection( false );
3214                         $parserOptions->setIsPreview( true );
3215                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3216
3217                         # don't parse non-wikitext pages, show message about preview
3218                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3219                                 if ( $this->mTitle->isCssJsSubpage() ) {
3220                                         $level = 'user';
3221                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3222                                         $level = 'site';
3223                                 } else {
3224                                         $level = false;
3225                                 }
3226
3227                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3228                                         $format = 'css';
3229                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3230                                         $format = 'js';
3231                                 } else {
3232                                         $format = false;
3233                                 }
3234
3235                                 # Used messages to make sure grep find them:
3236                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3237                                 if ( $level && $format ) {
3238                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3239                                                 wfMessage( "{$level}{$format}preview" )->text() .
3240                                                 ' ' . $continueEditing . "</div>";
3241                                 }
3242                         }
3243
3244                         # If we're adding a comment, we need to show the
3245                         # summary as the headline
3246                         if ( $this->section === "new" && $this->summary !== "" ) {
3247                                 $content = $content->addSectionHeader( $this->summary );
3248                         }
3249
3250                         $hook_args = array( $this, &$content );
3251                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3252                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3253
3254                         $parserOptions->enableLimitReport();
3255
3256                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3257                         # But it's now deprecated, so never mind
3258
3259                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3260                         $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3261
3262                         $previewHTML = $parserOutput->getText();
3263                         $this->mParserOutput = $parserOutput;
3264                         $wgOut->addParserOutputNoText( $parserOutput );
3265
3266                         if ( count( $parserOutput->getWarnings() ) ) {
3267                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3268                         }
3269                 } catch ( MWContentSerializationException $ex ) {
3270                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3271                         $note .= "\n\n" . $m->parse();
3272                         $previewHTML = '';
3273                 }
3274
3275                 if ( $this->isConflict ) {
3276                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3277                 } else {
3278                         $conflict = '<hr />';
3279                 }
3280
3281                 $previewhead = "<div class='previewnote'>\n" .
3282                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3283                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3284
3285                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3286                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3287                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3288                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3289
3290                 wfProfileOut( __METHOD__ );
3291                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3292         }
3293
3294         /**
3295          * @return Array
3296          */
3297         function getTemplates() {
3298                 if ( $this->preview || $this->section != '' ) {
3299                         $templates = array();
3300                         if ( !isset( $this->mParserOutput ) ) {
3301                                 return $templates;
3302                         }
3303                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3304                                 foreach ( array_keys( $template ) as $dbk ) {
3305                                         $templates[] = Title::makeTitle( $ns, $dbk );
3306                                 }
3307                         }
3308                         return $templates;
3309                 } else {
3310                         return $this->mTitle->getTemplateLinksFrom();
3311                 }
3312         }
3313
3314         /**
3315          * Shows a bulletin board style toolbar for common editing functions.
3316          * It can be disabled in the user preferences.
3317          * The necessary JavaScript code can be found in skins/common/edit.js.
3318          *
3319          * @return string
3320          */
3321         static function getEditToolbar() {
3322                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3323                 global $wgEnableUploads, $wgForeignFileRepos;
3324
3325                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3326
3327                 /**
3328                  * $toolarray is an array of arrays each of which includes the
3329                  * filename of the button image (without path), the opening
3330                  * tag, the closing tag, optionally a sample text that is
3331                  * inserted between the two when no selection is highlighted
3332                  * and.  The tip text is shown when the user moves the mouse
3333                  * over the button.
3334                  *
3335                  * Also here: accesskeys (key), which are not used yet until
3336                  * someone can figure out a way to make them work in
3337                  * IE. However, we should make sure these keys are not defined
3338                  * on the edit page.
3339                  */
3340                 $toolarray = array(
3341                         array(
3342                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3343                                 'id'     => 'mw-editbutton-bold',
3344                                 'open'   => '\'\'\'',
3345                                 'close'  => '\'\'\'',
3346                                 'sample' => wfMessage( 'bold_sample' )->text(),
3347                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3348                                 'key'    => 'B'
3349                         ),
3350                         array(
3351                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3352                                 'id'     => 'mw-editbutton-italic',
3353                                 'open'   => '\'\'',
3354                                 'close'  => '\'\'',
3355                                 'sample' => wfMessage( 'italic_sample' )->text(),
3356                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3357                                 'key'    => 'I'
3358                         ),
3359                         array(
3360                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3361                                 'id'     => 'mw-editbutton-link',
3362                                 'open'   => '[[',
3363                                 'close'  => ']]',
3364                                 'sample' => wfMessage( 'link_sample' )->text(),
3365                                 'tip'    => wfMessage( 'link_tip' )->text(),
3366                                 'key'    => 'L'
3367                         ),
3368                         array(
3369                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3370                                 'id'     => 'mw-editbutton-extlink',
3371                                 'open'   => '[',
3372                                 'close'  => ']',
3373                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3374                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3375                                 'key'    => 'X'
3376                         ),
3377                         array(
3378                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3379                                 'id'     => 'mw-editbutton-headline',
3380                                 'open'   => "\n== ",
3381                                 'close'  => " ==\n",
3382                                 'sample' => wfMessage( 'headline_sample' )->text(),
3383                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3384                                 'key'    => 'H'
3385                         ),
3386                         $imagesAvailable ? array(
3387                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3388                                 'id'     => 'mw-editbutton-image',
3389                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3390                                 'close'  => ']]',
3391                                 'sample' => wfMessage( 'image_sample' )->text(),
3392                                 'tip'    => wfMessage( 'image_tip' )->text(),
3393                                 'key'    => 'D',
3394                         ) : false,
3395                         $imagesAvailable ? array(
3396                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3397                                 'id'     => 'mw-editbutton-media',
3398                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3399                                 'close'  => ']]',
3400                                 'sample' => wfMessage( 'media_sample' )->text(),
3401                                 'tip'    => wfMessage( 'media_tip' )->text(),
3402                                 'key'    => 'M'
3403                         ) : false,
3404                         class_exists( 'MathRenderer' ) ? array(
3405                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3406                                 'id'     => 'mw-editbutton-math',
3407                                 'open'   => "<math>",
3408                                 'close'  => "</math>",
3409                                 'sample' => wfMessage( 'math_sample' )->text(),
3410                                 'tip'    => wfMessage( 'math_tip' )->text(),
3411                                 'key'    => 'C'
3412                         ) : false,
3413                         array(
3414                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3415                                 'id'     => 'mw-editbutton-nowiki',
3416                                 'open'   => "<nowiki>",
3417                                 'close'  => "</nowiki>",
3418                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3419                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3420                                 'key'    => 'N'
3421                         ),
3422                         array(
3423                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3424                                 'id'     => 'mw-editbutton-signature',
3425                                 'open'   => '--~~~~',
3426                                 'close'  => '',
3427                                 'sample' => '',
3428                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3429                                 'key'    => 'Y'
3430                         ),
3431                         array(
3432                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3433                                 'id'     => 'mw-editbutton-hr',
3434                                 'open'   => "\n----\n",
3435                                 'close'  => '',
3436                                 'sample' => '',
3437                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3438                                 'key'    => 'R'
3439                         )
3440                 );
3441
3442                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3443                 foreach ( $toolarray as $tool ) {
3444                         if ( !$tool ) {
3445                                 continue;
3446                         }
3447
3448                         $params = array(
3449                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3450                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3451                                 // Older browsers show a "speedtip" type message only for ALT.
3452                                 // Ideally these should be different, realistically they
3453                                 // probably don't need to be.
3454                                 $tip = $tool['tip'],
3455                                 $open = $tool['open'],
3456                                 $close = $tool['close'],
3457                                 $sample = $tool['sample'],
3458                                 $cssId = $tool['id'],
3459                         );
3460
3461                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3462                 }
3463
3464                 // This used to be called on DOMReady from mediawiki.action.edit, which
3465                 // ended up causing race conditions with the setup code above.
3466                 $script .= "\n" .
3467                         "// Create button bar\n" .
3468                         "$(function() { mw.toolbar.init(); } );\n";
3469
3470                 $script .= '});';
3471                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3472
3473                 $toolbar = '<div id="toolbar"></div>';
3474
3475                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3476
3477                 return $toolbar;
3478         }
3479
3480         /**
3481          * Returns an array of html code of the following checkboxes:
3482          * minor and watch
3483          *
3484          * @param int $tabindex Current tabindex
3485          * @param array $checked of checkbox => bool, where bool indicates the checked
3486          *                 status of the checkbox
3487          *
3488          * @return array
3489          */
3490         public function getCheckboxes( &$tabindex, $checked ) {
3491                 global $wgUser;
3492
3493                 $checkboxes = array();
3494
3495                 // don't show the minor edit checkbox if it's a new page or section
3496                 if ( !$this->isNew ) {
3497                         $checkboxes['minor'] = '';
3498                         $minorLabel = wfMessage( 'minoredit' )->parse();
3499                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3500                                 $attribs = array(
3501                                         'tabindex' => ++$tabindex,
3502                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3503                                         'id' => 'wpMinoredit',
3504                                 );
3505                                 $checkboxes['minor'] =
3506                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3507                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3508                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3509                                         ">{$minorLabel}</label>";
3510                         }
3511                 }
3512
3513                 $watchLabel = wfMessage( 'watchthis' )->parse();
3514                 $checkboxes['watch'] = '';
3515                 if ( $wgUser->isLoggedIn() ) {
3516                         $attribs = array(
3517                                 'tabindex' => ++$tabindex,
3518                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3519                                 'id' => 'wpWatchthis',
3520                         );
3521                         $checkboxes['watch'] =
3522                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3523                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3524                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3525                                 ">{$watchLabel}</label>";
3526                 }
3527                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3528                 return $checkboxes;
3529         }
3530
3531         /**
3532          * Returns an array of html code of the following buttons:
3533          * save, diff, preview and live
3534          *
3535          * @param int $tabindex Current tabindex
3536          *
3537          * @return array
3538          */
3539         public function getEditButtons( &$tabindex ) {
3540                 $buttons = array();
3541
3542                 $temp = array(
3543                         'id' => 'wpSave',
3544                         'name' => 'wpSave',
3545                         'type' => 'submit',
3546                         'tabindex' => ++$tabindex,
3547                         'value' => wfMessage( 'savearticle' )->text(),
3548                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3549                         'title' => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3550                 );
3551                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3552
3553                 ++$tabindex; // use the same for preview and live preview
3554                 $temp = array(
3555                         'id' => 'wpPreview',
3556                         'name' => 'wpPreview',
3557                         'type' => 'submit',
3558                         'tabindex' => $tabindex,
3559                         'value' => wfMessage( 'showpreview' )->text(),
3560                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3561                         'title' => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3562                 );
3563                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3564                 $buttons['live'] = '';
3565
3566                 $temp = array(
3567                         'id' => 'wpDiff',
3568                         'name' => 'wpDiff',
3569                         'type' => 'submit',
3570                         'tabindex' => ++$tabindex,
3571                         'value' => wfMessage( 'showdiff' )->text(),
3572                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3573                         'title' => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3574                 );
3575                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3576
3577                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3578                 return $buttons;
3579         }
3580
3581         /**
3582          * Output preview text only. This can be sucked into the edit page
3583          * via JavaScript, and saves the server time rendering the skin as
3584          * well as theoretically being more robust on the client (doesn't
3585          * disturb the edit box's undo history, won't eat your text on
3586          * failure, etc).
3587          *
3588          * @todo This doesn't include category or interlanguage links.
3589          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3590          *       or something...</s>" that might also require more skin
3591          *       initialization, so check whether that's a problem.
3592          */
3593         function livePreview() {
3594                 global $wgOut;
3595                 $wgOut->disable();
3596                 header( 'Content-type: text/xml; charset=utf-8' );
3597                 header( 'Cache-control: no-cache' );
3598
3599                 $previewText = $this->getPreviewText();
3600                 #$categories = $skin->getCategoryLinks();
3601
3602                 $s =
3603                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3604                 Xml::tags( 'livepreview', null,
3605                         Xml::element( 'preview', null, $previewText )
3606                         #.      Xml::element( 'category', null, $categories )
3607                 );
3608                 echo $s;
3609         }
3610
3611         /**
3612          * Call the stock "user is blocked" page
3613          *
3614          * @deprecated in 1.19; throw an exception directly instead
3615          */
3616         function blockedPage() {
3617                 wfDeprecated( __METHOD__, '1.19' );
3618                 global $wgUser;
3619
3620                 throw new UserBlockedError( $wgUser->getBlock() );
3621         }
3622
3623         /**
3624          * Produce the stock "please login to edit pages" page
3625          *
3626          * @deprecated in 1.19; throw an exception directly instead
3627          */
3628         function userNotLoggedInPage() {
3629                 wfDeprecated( __METHOD__, '1.19' );
3630                 throw new PermissionsError( 'edit' );
3631         }
3632
3633         /**
3634          * Show an error page saying to the user that he has insufficient permissions
3635          * to create a new page
3636          *
3637          * @deprecated in 1.19; throw an exception directly instead
3638          */
3639         function noCreatePermission() {
3640                 wfDeprecated( __METHOD__, '1.19' );
3641                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3642                 throw new PermissionsError( $permission );
3643         }
3644
3645         /**
3646          * Creates a basic error page which informs the user that
3647          * they have attempted to edit a nonexistent section.
3648          */
3649         function noSuchSectionPage() {
3650                 global $wgOut;
3651
3652                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3653
3654                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3655                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3656                 $wgOut->addHTML( $res );
3657
3658                 $wgOut->returnToMain( false, $this->mTitle );
3659         }
3660
3661         /**
3662          * Show "your edit contains spam" page with your diff and text
3663          *
3664          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3665          */
3666         public function spamPageWithContent( $match = false ) {
3667                 global $wgOut, $wgLang;
3668                 $this->textbox2 = $this->textbox1;
3669
3670                 if ( is_array( $match ) ) {
3671                         $match = $wgLang->listToText( $match );
3672                 }
3673                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3674
3675                 $wgOut->addHTML( '<div id="spamprotected">' );
3676                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3677                 if ( $match ) {
3678                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3679                 }
3680                 $wgOut->addHTML( '</div>' );
3681
3682                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3683                 $this->showDiff();
3684
3685                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3686                 $this->showTextbox2();
3687
3688                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3689         }
3690
3691         /**
3692          * Format an anchor fragment as it would appear for a given section name
3693          * @param $text String
3694          * @return String
3695          * @private
3696          */
3697         function sectionAnchor( $text ) {
3698                 global $wgParser;
3699                 return $wgParser->guessSectionNameFromWikiText( $text );
3700         }
3701
3702         /**
3703          * Check if the browser is on a blacklist of user-agents known to
3704          * mangle UTF-8 data on form submission. Returns true if Unicode
3705          * should make it through, false if it's known to be a problem.
3706          * @return bool
3707          * @private
3708          */
3709         function checkUnicodeCompliantBrowser() {
3710                 global $wgBrowserBlackList, $wgRequest;
3711
3712                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3713                 if ( $currentbrowser === false ) {
3714                         // No User-Agent header sent? Trust it by default...
3715                         return true;
3716                 }
3717
3718                 foreach ( $wgBrowserBlackList as $browser ) {
3719                         if ( preg_match( $browser, $currentbrowser ) ) {
3720                                 return false;
3721                         }
3722                 }
3723                 return true;
3724         }
3725
3726         /**
3727          * Filter an input field through a Unicode de-armoring process if it
3728          * came from an old browser with known broken Unicode editing issues.
3729          *
3730          * @param $request WebRequest
3731          * @param $field String
3732          * @return String
3733          * @private
3734          */
3735         function safeUnicodeInput( $request, $field ) {
3736                 $text = rtrim( $request->getText( $field ) );
3737                 return $request->getBool( 'safemode' )
3738                         ? $this->unmakesafe( $text )
3739                         : $text;
3740         }
3741
3742         /**
3743          * @param $request WebRequest
3744          * @param $text string
3745          * @return string
3746          */
3747         function safeUnicodeText( $request, $text ) {
3748                 $text = rtrim( $text );
3749                 return $request->getBool( 'safemode' )
3750                         ? $this->unmakesafe( $text )
3751                         : $text;
3752         }
3753
3754         /**
3755          * Filter an output field through a Unicode armoring process if it is
3756          * going to an old browser with known broken Unicode editing issues.
3757          *
3758          * @param $text String
3759          * @return String
3760          * @private
3761          */
3762         function safeUnicodeOutput( $text ) {
3763                 global $wgContLang;
3764                 $codedText = $wgContLang->recodeForEdit( $text );
3765                 return $this->checkUnicodeCompliantBrowser()
3766                         ? $codedText
3767                         : $this->makesafe( $codedText );
3768         }
3769
3770         /**
3771          * A number of web browsers are known to corrupt non-ASCII characters
3772          * in a UTF-8 text editing environment. To protect against this,
3773          * detected browsers will be served an armored version of the text,
3774          * with non-ASCII chars converted to numeric HTML character references.
3775          *
3776          * Preexisting such character references will have a 0 added to them
3777          * to ensure that round-trips do not alter the original data.
3778          *
3779          * @param $invalue String
3780          * @return String
3781          * @private
3782          */
3783         function makesafe( $invalue ) {
3784                 // Armor existing references for reversibility.
3785                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3786
3787                 $bytesleft = 0;
3788                 $result = "";
3789                 $working = 0;
3790                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3791                         $bytevalue = ord( $invalue[$i] );
3792                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3793                                 $result .= chr( $bytevalue );
3794                                 $bytesleft = 0;
3795                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3796                                 $working = $working << 6;
3797                                 $working += ( $bytevalue & 0x3F );
3798                                 $bytesleft--;
3799                                 if ( $bytesleft <= 0 ) {
3800                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3801                                 }
3802                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3803                                 $working = $bytevalue & 0x1F;
3804                                 $bytesleft = 1;
3805                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3806                                 $working = $bytevalue & 0x0F;
3807                                 $bytesleft = 2;
3808                         } else { // 1111 0xxx
3809                                 $working = $bytevalue & 0x07;
3810                                 $bytesleft = 3;
3811                         }
3812                 }
3813                 return $result;
3814         }
3815
3816         /**
3817          * Reverse the previously applied transliteration of non-ASCII characters
3818          * back to UTF-8. Used to protect data from corruption by broken web browsers
3819          * as listed in $wgBrowserBlackList.
3820          *
3821          * @param $invalue String
3822          * @return String
3823          * @private
3824          */
3825         function unmakesafe( $invalue ) {
3826                 $result = "";
3827                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3828                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3829                                 $i += 3;
3830                                 $hexstring = "";
3831                                 do {
3832                                         $hexstring .= $invalue[$i];
3833                                         $i++;
3834                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3835
3836                                 // Do some sanity checks. These aren't needed for reversibility,
3837                                 // but should help keep the breakage down if the editor
3838                                 // breaks one of the entities whilst editing.
3839                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3840                                         $codepoint = hexdec( $hexstring );
3841                                         $result .= codepointToUtf8( $codepoint );
3842                                 } else {
3843                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3844                                 }
3845                         } else {
3846                                 $result .= substr( $invalue, $i, 1 );
3847                         }
3848                 }
3849                 // reverse the transform that we made for reversibility reasons.
3850                 return strtr( $result, array( "&#x0" => "&#x" ) );
3851         }
3852 }