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                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 516
 517                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 518                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 519                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 520                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 521                 $wgOut->addHTML( "<hr />\n" );
 522
 523                 # If the user made changes, preserve them when showing the markup
 524                 # (This happens when a user is blocked during edit, for instance)
 525                 if ( !$this->firsttime ) {
 526                         $text = $this->textbox1;
 527                         $wgOut->addWikiMsg( 'viewyourtext' );
 528                 } else {
 529                         $text = $this->toEditText( $content );
 530                         $wgOut->addWikiMsg( 'viewsourcetext' );
 531                 }
 532
 533                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 534
 535                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 536                         Linker::formatTemplates( $this->getTemplates() ) ) );
 537
 538                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 539
 540                 if ( $this->mTitle->exists() ) {
 541                         $wgOut->returnToMain( null, $this->mTitle );
 542                 }
 543         }
 544
 545         /**
 546          * Show a read-only error
 547          * Parameters are the same as OutputPage:readOnlyPage()
 548          * Redirect to the article page if redlink=1
 549          * @deprecated in 1.19; use displayPermissionsError() instead
 550          */
 551         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 552                 wfDeprecated( __METHOD__, '1.19' );
 553
 554                 global $wgRequest, $wgOut;
 555                 if ( $wgRequest->getBool( 'redlink' ) ) {
 556                         // The edit page was reached via a red link.
 557                         // Redirect to the article page and let them click the edit tab if
 558                         // they really want a permission error.
 559                         $wgOut->redirect( $this->mTitle->getFullURL() );
 560                 } else {
 561                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 562                 }
 563         }
 564
 565         /**
 566          * Should we show a preview when the edit form is first shown?
 567          *
 568          * @return bool
 569          */
 570         protected function previewOnOpen() {
 571                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 572                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 573                         // Explicit override from request
 574                         return true;
 575                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 576                         // Explicit override from request
 577                         return false;
 578                 } elseif ( $this->section == 'new' ) {
 579                         // Nothing *to* preview for new sections
 580                         return false;
 581                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 582                         // Standard preference behavior
 583                         return true;
 584                 } elseif ( !$this->mTitle->exists()
 585                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 586                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 587                 ) {
 588                         // Categories are special
 589                         return true;
 590                 } else {
 591                         return false;
 592                 }
 593         }
 594
 595         /**
 596          * Checks whether the user entered a skin name in uppercase,
 597          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 598          *
 599          * @return bool
 600          */
 601         protected function isWrongCaseCssJsPage() {
 602                 if ( $this->mTitle->isCssJsSubpage() ) {
 603                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 604                         $skins = array_merge(
 605                                 array_keys( Skin::getSkinNames() ),
 606                                 array( 'common' )
 607                         );
 608                         return !in_array( $name, $skins )
 609                                 && in_array( strtolower( $name ), $skins );
 610                 } else {
 611                         return false;
 612                 }
 613         }
 614
 615         /**
 616          * Returns whether section editing is supported for the current page.
 617          * Subclasses may override this to replace the default behavior, which is
 618          * to check ContentHandler::supportsSections.
 619          *
 620          * @return bool true if this edit page supports sections, false otherwise.
 621          */
 622         protected function isSectionEditSupported() {
 623                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 624                 return $contentHandler->supportsSections();
 625         }
 626
 627         /**
 628          * This function collects the form data and uses it to populate various member variables.
 629          * @param $request WebRequest
 630          * @throws ErrorPageError
 631          */
 632         function importFormData( &$request ) {
 633                 global $wgContLang, $wgUser;
 634
 635                 wfProfileIn( __METHOD__ );
 636
 637                 # Section edit can come from either the form or a link
 638                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 639
 640                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 641                         wfProfileOut( __METHOD__ );
 642                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 643                 }
 644
 645                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 646
 647                 if ( $request->wasPosted() ) {
 648                         # These fields need to be checked for encoding.
 649                         # Also remove trailing whitespace, but don't remove _initial_
 650                         # whitespace from the text boxes. This may be significant formatting.
 651                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 652                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 653                                 // Skip this if wpTextbox2 has input, it indicates that we came
 654                                 // from a conflict page with raw page text, not a custom form
 655                                 // modified by subclasses
 656                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 657                                 $textbox1 = $this->importContentFormData( $request );
 658                                 if ( $textbox1 !== null ) {
 659                                         $this->textbox1 = $textbox1;
 660                                 }
 661
 662                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 663                         }
 664
 665                         # Truncate for whole multibyte characters
 666                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 667
 668                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 669                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 670                         # section titles.
 671                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 672
 673                         # Treat sectiontitle the same way as summary.
 674                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 675                         # currently doing double duty as both edit summary and section title. Right now this
 676                         # is just to allow API edits to work around this limitation, but this should be
 677                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 678                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 679                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 680
 681                         $this->edittime = $request->getVal( 'wpEdittime' );
 682                         $this->starttime = $request->getVal( 'wpStarttime' );
 683
 684                         $undidRev = $request->getInt( 'wpUndidRevision' );
 685                         if ( $undidRev ) {
 686                                 $this->undidRev = $undidRev;
 687                         }
 688
 689                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 690
 691                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 692                                 // wpTextbox1 field is missing, possibly due to being "too big"
 693                                 // according to some filter rules such as Suhosin's setting for
 694                                 // suhosin.request.max_value_length (d'oh)
 695                                 $this->incompleteForm = true;
 696                         } else {
 697                                 // edittime should be one of our last fields; if it's missing,
 698                                 // the submission probably broke somewhere in the middle.
 699                                 $this->incompleteForm = is_null( $this->edittime );
 700                         }
 701                         if ( $this->incompleteForm ) {
 702                                 # If the form is incomplete, force to preview.
 703                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 704                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 705                                 $this->preview = true;
 706                         } else {
 707                                 /* Fallback for live preview */
 708                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 709                                 $this->diff = $request->getCheck( 'wpDiff' );
 710
 711                                 // Remember whether a save was requested, so we can indicate
 712                                 // if we forced preview due to session failure.
 713                                 $this->mTriedSave = !$this->preview;
 714
 715                                 if ( $this->tokenOk( $request ) ) {
 716                                         # Some browsers will not report any submit button
 717                                         # if the user hits enter in the comment box.
 718                                         # The unmarked state will be assumed to be a save,
 719                                         # if the form seems otherwise complete.
 720                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 721                                 } elseif ( $this->diff ) {
 722                                         # Failed token check, but only requested "Show Changes".
 723                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 724                                 } else {
 725                                         # Page might be a hack attempt posted from
 726                                         # an external site. Preview instead of saving.
 727                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 728                                         $this->preview = true;
 729                                 }
 730                         }
 731                         $this->save = !$this->preview && !$this->diff;
 732                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 733                                 $this->edittime = null;
 734                         }
 735
 736                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 737                                 $this->starttime = null;
 738                         }
 739
 740                         $this->recreate = $request->getCheck( 'wpRecreate' );
 741
 742                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 743                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 744
 745                         # Don't force edit summaries when a user is editing their own user or talk page
 746                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 747                                 && $this->mTitle->getText() == $wgUser->getName()
 748                         ) {
 749                                 $this->allowBlankSummary = true;
 750                         } else {
 751                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 752                         }
 753
 754                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 755                 } else {
 756                         # Not a posted form? Start with nothing.
 757                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 758                         $this->textbox1 = '';
 759                         $this->summary = '';
 760                         $this->sectiontitle = '';
 761                         $this->edittime = '';
 762                         $this->starttime = wfTimestampNow();
 763                         $this->edit = false;
 764                         $this->preview = false;
 765                         $this->save = false;
 766                         $this->diff = false;
 767                         $this->minoredit = false;
 768                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overridden by request parameters
 769                         $this->recreate = false;
 770
 771                         // When creating a new section, we can preload a section title by passing it as the
 772                         // preloadtitle parameter in the URL (Bug 13100)
 773                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 774                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 775                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 776                                 $this->summary = $request->getVal( 'preloadtitle' );
 777                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 778                                 $this->summary = $request->getText( 'summary' );
 779                                 if ( $this->summary !== '' ) {
 780                                         $this->hasPresetSummary = true;
 781                                 }
 782                         }
 783
 784                         if ( $request->getVal( 'minor' ) ) {
 785                                 $this->minoredit = true;
 786                         }
 787                 }
 788
 789                 $this->oldid = $request->getInt( 'oldid' );
 790
 791                 $this->bot = $request->getBool( 'bot', true );
 792                 $this->nosummary = $request->getBool( 'nosummary' );
 793
 794                 $this->contentModel = $request->getText( 'model', $this->contentModel ); #may be overridden by revision
 795                 $this->contentFormat = $request->getText( 'format', $this->contentFormat ); #may be overridden by revision
 796
 797                 if ( !ContentHandler::getForModelID( $this->contentModel )->isSupportedFormat( $this->contentFormat ) ) {
 798                         throw new ErrorPageError(
 799                                 'editpage-notsupportedcontentformat-title',
 800                                 'editpage-notsupportedcontentformat-text',
 801                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 802                         );
 803                 }
 804                 #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
 805
 806                 $this->live = $request->getCheck( 'live' );
 807                 $this->editintro = $request->getText( 'editintro',
 808                         // Custom edit intro for new sections
 809                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 810
 811                 // Allow extensions to modify form data
 812                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 813
 814                 wfProfileOut( __METHOD__ );
 815         }
 816
 817         /**
 818          * Subpage overridable method for extracting the page content data from the
 819          * posted form to be placed in $this->textbox1, if using customized input
 820          * this method should be overridden and return the page text that will be used
 821          * for saving, preview parsing and so on...
 822          *
 823          * @param $request WebRequest
 824          */
 825         protected function importContentFormData( &$request ) {
 826                 return; // Don't do anything, EditPage already extracted wpTextbox1
 827         }
 828
 829         /**
 830          * Initialise form fields in the object
 831          * Called on the first invocation, e.g. when a user clicks an edit link
 832          * @return bool -- if the requested section is valid
 833          */
 834         function initialiseForm() {
 835                 global $wgUser;
 836                 $this->edittime = $this->mArticle->getTimestamp();
 837
 838                 $content = $this->getContentObject( false ); #TODO: track content object?!
 839                 if ( $content === false ) {
 840                         return false;
 841                 }
 842                 $this->textbox1 = $this->toEditText( $content );
 843
 844                 // activate checkboxes if user wants them to be always active
 845                 # Sort out the "watch" checkbox
 846                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 847                         # Watch all edits
 848                         $this->watchthis = true;
 849                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 850                         # Watch creations
 851                         $this->watchthis = true;
 852                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 853                         # Already watched
 854                         $this->watchthis = true;
 855                 }
 856                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 857                         $this->minoredit = true;
 858                 }
 859                 if ( $this->textbox1 === false ) {
 860                         return false;
 861                 }
 862                 return true;
 863         }
 864
 865         /**
 866          * Fetch initial editing page content.
 867          *
 868          * @param $def_text string|bool
 869          * @return mixed string on success, $def_text for invalid sections
 870          * @private
 871          * @deprecated since 1.21, get WikiPage::getContent() instead.
 872          */
 873         function getContent( $def_text = false ) {
 874                 ContentHandler::deprecated( __METHOD__, '1.21' );
 875
 876                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 877                         $def_content = $this->toEditContent( $def_text );
 878                 } else {
 879                         $def_content = false;
 880                 }
 881
 882                 $content = $this->getContentObject( $def_content );
 883
 884                 // Note: EditPage should only be used with text based content anyway.
 885                 return $this->toEditText( $content );
 886         }
 887
 888         /**
 889          * @param Content|null $def_content The default value to return
 890          *
 891          * @return mixed Content on success, $def_content for invalid sections
 892          *
 893          * @since 1.21
 894          */
 895         protected function getContentObject( $def_content = null ) {
 896                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 897
 898                 wfProfileIn( __METHOD__ );
 899
 900                 $content = false;
 901
 902                 // For message page not locally set, use the i18n message.
 903                 // For other non-existent articles, use preload text if any.
 904                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 905                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 906                                 # If this is a system message, get the default text.
 907                                 $msg = $this->mTitle->getDefaultMessageText();
 908
 909                                 $content = $this->toEditContent( $msg );
 910                         }
 911                         if ( $content === false ) {
 912                                 # If requested, preload some text.
 913                                 $preload = $wgRequest->getVal( 'preload',
 914                                         // Custom preload text for new sections
 915                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 916
 917                                 $content = $this->getPreloadedContent( $preload );
 918                         }
 919                 // For existing pages, get text based on "undo" or section parameters.
 920                 } else {
 921                         if ( $this->section != '' ) {
 922                                 // Get section edit text (returns $def_text for invalid sections)
 923                                 $orig = $this->getOriginalContent();
 924                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 925
 926                                 if ( !$content ) {
 927                                         $content = $def_content;
 928                                 }
 929                         } else {
 930                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 931                                 $undo = $wgRequest->getInt( 'undo' );
 932
 933                                 if ( $undo > 0 && $undoafter > 0 ) {
 934
 935                                         $undorev = Revision::newFromId( $undo );
 936                                         $oldrev = Revision::newFromId( $undoafter );
 937
 938                                         # Sanity check, make sure it's the right page,
 939                                         # the revisions exist and they were not deleted.
 940                                         # Otherwise, $content will be left as-is.
 941                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 942                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 943                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 944
 945                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 946
 947                                                 if ( $content === false ) {
 948                                                         # Warn the user that something went wrong
 949                                                         $undoMsg = 'failure';
 950                                                 } else {
 951                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
 952                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
 953                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
 954
 955                                                         if ( $newContent->equals( $oldContent ) ) {
 956                                                                 # Tell the user that the undo results in no change,
 957                                                                 # i.e. the revisions were already undone.
 958                                                                 $undoMsg = 'nochange';
 959                                                                 $content = false;
 960                                                         } else {
 961                                                                 # Inform the user of our success and set an automatic edit summary
 962                                                                 $undoMsg = 'success';
 963
 964                                                                 # If we just undid one rev, use an autosummary
 965                                                                 $firstrev = $oldrev->getNext();
 966                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
 967                                                                         $userText = $undorev->getUserText();
 968                                                                         if ( $userText === '' ) {
 969                                                                                 $undoSummary = wfMessage(
 970                                                                                         'undo-summary-username-hidden',
 971                                                                                         $undo
 972                                                                                 )->inContentLanguage()->text();
 973                                                                         } else {
 974                                                                                 $undoSummary = wfMessage(
 975                                                                                         'undo-summary',
 976                                                                                         $undo,
 977                                                                                         $userText
 978                                                                                 )->inContentLanguage()->text();
 979                                                                         }
 980                                                                         if ( $this->summary === '' ) {
 981                                                                                 $this->summary = $undoSummary;
 982                                                                         } else {
 983                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 984                                                                                         ->inContentLanguage()->text() . $this->summary;
 985                                                                         }
 986                                                                         $this->undidRev = $undo;
 987                                                                 }
 988                                                                 $this->formtype = 'diff';
 989                                                         }
 990                                                 }
 991                                         } else {
 992                                                 // Failed basic sanity checks.
 993                                                 // Older revisions may have been removed since the link
 994                                                 // was created, or we may simply have got bogus input.
 995                                                 $undoMsg = 'norev';
 996                                         }
 997
 998                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
 999                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1000                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1001                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1002                                 }
1003
1004                                 if ( $content === false ) {
1005                                         $content = $this->getOriginalContent();
1006                                 }
1007                         }
1008                 }
1009
1010                 wfProfileOut( __METHOD__ );
1011                 return $content;
1012         }
1013
1014         /**
1015          * Get the content of the wanted revision, without section extraction.
1016          *
1017          * The result of this function can be used to compare user's input with
1018          * section replaced in its context (using WikiPage::replaceSection())
1019          * to the original text of the edit.
1020          *
1021          * This differs from Article::getContent() that when a missing revision is
1022          * encountered the result will be null and not the
1023          * 'missing-revision' message.
1024          *
1025          * @since 1.19
1026          * @return Content|null
1027          */
1028         private function getOriginalContent() {
1029                 if ( $this->section == 'new' ) {
1030                         return $this->getCurrentContent();
1031                 }
1032                 $revision = $this->mArticle->getRevisionFetched();
1033                 if ( $revision === null ) {
1034                         if ( !$this->contentModel ) {
1035                                 $this->contentModel = $this->getTitle()->getContentModel();
1036                         }
1037                         $handler = ContentHandler::getForModelID( $this->contentModel );
1038
1039                         return $handler->makeEmptyContent();
1040                 }
1041                 $content = $revision->getContent();
1042                 return $content;
1043         }
1044
1045         /**
1046          * Get the current content of the page. This is basically similar to
1047          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1048          * content object is returned instead of null.
1049          *
1050          * @since 1.21
1051          * @return Content
1052          */
1053         protected function getCurrentContent() {
1054                 $rev = $this->mArticle->getRevision();
1055                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1056
1057                 if ( $content === false || $content === null ) {
1058                         if ( !$this->contentModel ) {
1059                                 $this->contentModel = $this->getTitle()->getContentModel();
1060                         }
1061                         $handler = ContentHandler::getForModelID( $this->contentModel );
1062
1063                         return $handler->makeEmptyContent();
1064                 } else {
1065                         # nasty side-effect, but needed for consistency
1066                         $this->contentModel = $rev->getContentModel();
1067                         $this->contentFormat = $rev->getContentFormat();
1068
1069                         return $content;
1070                 }
1071         }
1072
1073         /**
1074          * Use this method before edit() to preload some text into the edit box
1075          *
1076          * @param $text string
1077          * @deprecated since 1.21, use setPreloadedContent() instead.
1078          */
1079         public function setPreloadedText( $text ) {
1080                 ContentHandler::deprecated( __METHOD__, "1.21" );
1081
1082                 $content = $this->toEditContent( $text );
1083
1084                 $this->setPreloadedContent( $content );
1085         }
1086
1087         /**
1088          * Use this method before edit() to preload some content into the edit box
1089          *
1090          * @param $content Content
1091          *
1092          * @since 1.21
1093          */
1094         public function setPreloadedContent( Content $content ) {
1095                 $this->mPreloadContent = $content;
1096         }
1097
1098         /**
1099          * Get the contents to be preloaded into the box, either set by
1100          * an earlier setPreloadText() or by loading the given page.
1101          *
1102          * @param string $preload representing the title to preload from.
1103          *
1104          * @return String
1105          *
1106          * @deprecated since 1.21, use getPreloadedContent() instead
1107          */
1108         protected function getPreloadedText( $preload ) {
1109                 ContentHandler::deprecated( __METHOD__, "1.21" );
1110
1111                 $content = $this->getPreloadedContent( $preload );
1112                 $text = $this->toEditText( $content );
1113
1114                 return $text;
1115         }
1116
1117         /**
1118          * Get the contents to be preloaded into the box, either set by
1119          * an earlier setPreloadText() or by loading the given page.
1120          *
1121          * @param string $preload representing the title to preload from.
1122          *
1123          * @return Content
1124          *
1125          * @since 1.21
1126          */
1127         protected function getPreloadedContent( $preload ) {
1128                 global $wgUser;
1129
1130                 if ( !empty( $this->mPreloadContent ) ) {
1131                         return $this->mPreloadContent;
1132                 }
1133
1134                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1135
1136                 if ( $preload === '' ) {
1137                         return $handler->makeEmptyContent();
1138                 }
1139
1140                 $title = Title::newFromText( $preload );
1141                 # Check for existence to avoid getting MediaWiki:Noarticletext
1142                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1143                         //TODO: somehow show a warning to the user!
1144                         return $handler->makeEmptyContent();
1145                 }
1146
1147                 $page = WikiPage::factory( $title );
1148                 if ( $page->isRedirect() ) {
1149                         $title = $page->getRedirectTarget();
1150                         # Same as before
1151                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1152                                 //TODO: somehow show a warning to the user!
1153                                 return $handler->makeEmptyContent();
1154                         }
1155                         $page = WikiPage::factory( $title );
1156                 }
1157
1158                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1159                 $content = $page->getContent( Revision::RAW );
1160
1161                 if ( !$content ) {
1162                         //TODO: somehow show a warning to the user!
1163                         return $handler->makeEmptyContent();
1164                 }
1165
1166                 if ( $content->getModel() !== $handler->getModelID() ) {
1167                         $converted = $content->convert( $handler->getModelID() );
1168
1169                         if ( !$converted ) {
1170                                 //TODO: somehow show a warning to the user!
1171                                 wfDebug( "Attempt to preload incompatible content: "
1172                                                 . "can't convert " . $content->getModel()
1173                                                 . " to " . $handler->getModelID() );
1174
1175                                 return $handler->makeEmptyContent();
1176                         }
1177
1178                         $content = $converted;
1179                 }
1180
1181                 return $content->preloadTransform( $title, $parserOptions );
1182         }
1183
1184         /**
1185          * Make sure the form isn't faking a user's credentials.
1186          *
1187          * @param $request WebRequest
1188          * @return bool
1189          * @private
1190          */
1191         function tokenOk( &$request ) {
1192                 global $wgUser;
1193                 $token = $request->getVal( 'wpEditToken' );
1194                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1195                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1196                 return $this->mTokenOk;
1197         }
1198
1199         /**
1200          * Sets post-edit cookie indicating the user just saved a particular revision.
1201          *
1202          * This uses a temporary cookie for each revision ID so separate saves will never
1203          * interfere with each other.
1204          *
1205          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1206          * the redirect.  It must be clearable by JavaScript code, so it must not be
1207          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1208          * variable.
1209          *
1210          * We use a path of '/' since wgCookiePath is not exposed to JS
1211          *
1212          * If the variable were set on the server, it would be cached, which is unwanted
1213          * since the post-edit state should only apply to the load right after the save.
1214          */
1215         protected function setPostEditCookie() {
1216                 $revisionId = $this->mArticle->getLatest();
1217                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1218
1219                 $response = RequestContext::getMain()->getRequest()->response();
1220                 $response->setcookie( $postEditKey, '1', time() + self::POST_EDIT_COOKIE_DURATION, array(
1221                         'path' => '/',
1222                         'httpOnly' => false,
1223                 ) );
1224         }
1225
1226         /**
1227          * Attempt submission
1228          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1229          * @return bool false if output is done, true if the rest of the form should be displayed
1230          */
1231         public function attemptSave() {
1232                 global $wgUser;
1233
1234                 $resultDetails = false;
1235                 # Allow bots to exempt some edits from bot flagging
1236                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1237                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1238
1239                 return $this->handleStatus( $status, $resultDetails );
1240         }
1241
1242         /**
1243          * Handle status, such as after attempt save
1244          *
1245          * @param Status $status
1246          * @param array|bool $resultDetails
1247          *
1248          * @throws ErrorPageError
1249          * return bool false, if output is done, true if rest of the form should be displayed
1250          */
1251         private function handleStatus( Status $status, $resultDetails ) {
1252                 global $wgUser, $wgOut;
1253
1254                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1255                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1256                         $this->didSave = true;
1257                         if ( !$resultDetails['nullEdit'] ) {
1258                                 $this->setPostEditCookie();
1259                         }
1260                 }
1261
1262                 switch ( $status->value ) {
1263                         case self::AS_HOOK_ERROR_EXPECTED:
1264                         case self::AS_CONTENT_TOO_BIG:
1265                         case self::AS_ARTICLE_WAS_DELETED:
1266                         case self::AS_CONFLICT_DETECTED:
1267                         case self::AS_SUMMARY_NEEDED:
1268                         case self::AS_TEXTBOX_EMPTY:
1269                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1270                         case self::AS_END:
1271                                 return true;
1272
1273                         case self::AS_HOOK_ERROR:
1274                                 return false;
1275
1276                         case self::AS_PARSE_ERROR:
1277                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1278                                 return true;
1279
1280                         case self::AS_SUCCESS_NEW_ARTICLE:
1281                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1282                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1283                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1284                                 return false;
1285
1286                         case self::AS_SUCCESS_UPDATE:
1287                                 $extraQuery = '';
1288                                 $sectionanchor = $resultDetails['sectionanchor'];
1289
1290                                 // Give extensions a chance to modify URL query on update
1291                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1292
1293                                 if ( $resultDetails['redirect'] ) {
1294                                         if ( $extraQuery == '' ) {
1295                                                 $extraQuery = 'redirect=no';
1296                                         } else {
1297                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1298                                         }
1299                                 }
1300                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1301                                 return false;
1302
1303                         case self::AS_BLANK_ARTICLE:
1304                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1305                                 return false;
1306
1307                         case self::AS_SPAM_ERROR:
1308                                 $this->spamPageWithContent( $resultDetails['spam'] );
1309                                 return false;
1310
1311                         case self::AS_BLOCKED_PAGE_FOR_USER:
1312                                 throw new UserBlockedError( $wgUser->getBlock() );
1313
1314                         case self::AS_IMAGE_REDIRECT_ANON:
1315                         case self::AS_IMAGE_REDIRECT_LOGGED:
1316                                 throw new PermissionsError( 'upload' );
1317
1318                         case self::AS_READ_ONLY_PAGE_ANON:
1319                         case self::AS_READ_ONLY_PAGE_LOGGED:
1320                                 throw new PermissionsError( 'edit' );
1321
1322                         case self::AS_READ_ONLY_PAGE:
1323                                 throw new ReadOnlyError;
1324
1325                         case self::AS_RATE_LIMITED:
1326                                 throw new ThrottledError();
1327
1328                         case self::AS_NO_CREATE_PERMISSION:
1329                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1330                                 throw new PermissionsError( $permission );
1331
1332                         default:
1333                                 // We don't recognize $status->value. The only way that can happen
1334                                 // is if an extension hook aborted from inside ArticleSave.
1335                                 // Render the status object into $this->hookError
1336                                 // FIXME this sucks, we should just use the Status object throughout
1337                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1338                                         '</div>';
1339                                 return true;
1340                 }
1341         }
1342
1343         /**
1344          * Run hooks that can filter edits just before they get saved.
1345          *
1346          * @param Content $content the Content to filter.
1347          * @param Status  $status for reporting the outcome to the caller
1348          * @param User    $user the user performing the edit
1349          *
1350          * @return bool
1351          */
1352         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1353                 // Run old style post-section-merge edit filter
1354                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1355                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1356
1357                         # Error messages etc. could be handled within the hook...
1358                         $status->fatal( 'hookaborted' );
1359                         $status->value = self::AS_HOOK_ERROR;
1360                         return false;
1361                 } elseif ( $this->hookError != '' ) {
1362                         # ...or the hook could be expecting us to produce an error
1363                         $status->fatal( 'hookaborted' );
1364                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1365                         return false;
1366                 }
1367
1368                 // Run new style post-section-merge edit filter
1369                 if ( !wfRunHooks( 'EditFilterMergedContent',
1370                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1371                                 $user, $this->minoredit ) ) ) {
1372
1373                         # Error messages etc. could be handled within the hook...
1374                         // XXX: $status->value may already be something informative...
1375                         $this->hookError = $status->getWikiText();
1376                         $status->fatal( 'hookaborted' );
1377                         $status->value = self::AS_HOOK_ERROR;
1378                         return false;
1379                 } elseif ( !$status->isOK() ) {
1380                         # ...or the hook could be expecting us to produce an error
1381                         // FIXME this sucks, we should just use the Status object throughout
1382                         $this->hookError = $status->getWikiText();
1383                         $status->fatal( 'hookaborted' );
1384                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1385                         return false;
1386                 }
1387
1388                 return true;
1389         }
1390
1391         /**
1392          * Attempt submission (no UI)
1393          *
1394          * @param array $result array to add statuses to, currently with the possible keys:
1395          *  spam - string - Spam string from content if any spam is detected by matchSpamRegex
1396          *  sectionanchor - string - Section anchor for a section save
1397          *  nullEdit - boolean - Set if doEditContent is OK.  True if null edit, false otherwise.
1398          *  redirect - boolean -  Set if doEditContent is OK.  True if resulting revision is a redirect
1399          * @param bool $bot True if edit is being made under the bot right.
1400          *
1401          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1402          *
1403          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1404          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1405          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1406          */
1407         function internalAttemptSave( &$result, $bot = false ) {
1408                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1409
1410                 $status = Status::newGood();
1411
1412                 wfProfileIn( __METHOD__ );
1413                 wfProfileIn( __METHOD__ . '-checks' );
1414
1415                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1416                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1417                         $status->fatal( 'hookaborted' );
1418                         $status->value = self::AS_HOOK_ERROR;
1419                         wfProfileOut( __METHOD__ . '-checks' );
1420                         wfProfileOut( __METHOD__ );
1421                         return $status;
1422                 }
1423
1424                 $spam = $wgRequest->getText( 'wpAntispam' );
1425                 if ( $spam !== '' ) {
1426                         wfDebugLog(
1427                                 'SimpleAntiSpam',
1428                                 $wgUser->getName() .
1429                                 ' editing "' .
1430                                 $this->mTitle->getPrefixedText() .
1431                                 '" submitted bogus field "' .
1432                                 $spam .
1433                                 '"'
1434                         );
1435                         $status->fatal( 'spamprotectionmatch', false );
1436                         $status->value = self::AS_SPAM_ERROR;
1437                         wfProfileOut( __METHOD__ . '-checks' );
1438                         wfProfileOut( __METHOD__ );
1439                         return $status;
1440                 }
1441
1442                 try {
1443                         # Construct Content object
1444                         $textbox_content = $this->toEditContent( $this->textbox1 );
1445                 } catch ( MWContentSerializationException $ex ) {
1446                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1447                         $status->value = self::AS_PARSE_ERROR;
1448                         wfProfileOut( __METHOD__ . '-checks' );
1449                         wfProfileOut( __METHOD__ );
1450                         return $status;
1451                 }
1452
1453                 # Check image redirect
1454                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1455                         $textbox_content->isRedirect() &&
1456                         !$wgUser->isAllowed( 'upload' ) ) {
1457                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1458                                 $status->setResult( false, $code );
1459
1460                                 wfProfileOut( __METHOD__ . '-checks' );
1461                                 wfProfileOut( __METHOD__ );
1462
1463                                 return $status;
1464                 }
1465
1466                 # Check for spam
1467                 $match = self::matchSummarySpamRegex( $this->summary );
1468                 if ( $match === false && $this->section == 'new' ) {
1469                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1470                         # regular summaries, it is added to the actual wikitext.
1471                         if ( $this->sectiontitle !== '' ) {
1472                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1473                                 $match = self::matchSpamRegex( $this->sectiontitle );
1474                         } else {
1475                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1476                                 # is used with the 'summary' parameter.
1477                                 $match = self::matchSpamRegex( $this->summary );
1478                         }
1479                 }
1480                 if ( $match === false ) {
1481                         $match = self::matchSpamRegex( $this->textbox1 );
1482                 }
1483                 if ( $match !== false ) {
1484                         $result['spam'] = $match;
1485                         $ip = $wgRequest->getIP();
1486                         $pdbk = $this->mTitle->getPrefixedDBkey();
1487                         $match = str_replace( "\n", '', $match );
1488                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1489                         $status->fatal( 'spamprotectionmatch', $match );
1490                         $status->value = self::AS_SPAM_ERROR;
1491                         wfProfileOut( __METHOD__ . '-checks' );
1492                         wfProfileOut( __METHOD__ );
1493                         return $status;
1494                 }
1495                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1496                         # Error messages etc. could be handled within the hook...
1497                         $status->fatal( 'hookaborted' );
1498                         $status->value = self::AS_HOOK_ERROR;
1499                         wfProfileOut( __METHOD__ . '-checks' );
1500                         wfProfileOut( __METHOD__ );
1501                         return $status;
1502                 } elseif ( $this->hookError != '' ) {
1503                         # ...or the hook could be expecting us to produce an error
1504                         $status->fatal( 'hookaborted' );
1505                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1506                         wfProfileOut( __METHOD__ . '-checks' );
1507                         wfProfileOut( __METHOD__ );
1508                         return $status;
1509                 }
1510
1511                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1512                         // Auto-block user's IP if the account was "hard" blocked
1513                         $wgUser->spreadAnyEditBlock();
1514                         # Check block state against master, thus 'false'.
1515                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1516                         wfProfileOut( __METHOD__ . '-checks' );
1517                         wfProfileOut( __METHOD__ );
1518                         return $status;
1519                 }
1520
1521                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1522                 if ( $this->kblength > $wgMaxArticleSize ) {
1523                         // Error will be displayed by showEditForm()
1524                         $this->tooBig = true;
1525                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1526                         wfProfileOut( __METHOD__ . '-checks' );
1527                         wfProfileOut( __METHOD__ );
1528                         return $status;
1529                 }
1530
1531                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1532                         if ( $wgUser->isAnon() ) {
1533                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1534                                 wfProfileOut( __METHOD__ . '-checks' );
1535                                 wfProfileOut( __METHOD__ );
1536                                 return $status;
1537                         } else {
1538                                 $status->fatal( 'readonlytext' );
1539                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1540                                 wfProfileOut( __METHOD__ . '-checks' );
1541                                 wfProfileOut( __METHOD__ );
1542                                 return $status;
1543                         }
1544                 }
1545
1546                 if ( wfReadOnly() ) {
1547                         $status->fatal( 'readonlytext' );
1548                         $status->value = self::AS_READ_ONLY_PAGE;
1549                         wfProfileOut( __METHOD__ . '-checks' );
1550                         wfProfileOut( __METHOD__ );
1551                         return $status;
1552                 }
1553                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1554                         $status->fatal( 'actionthrottledtext' );
1555                         $status->value = self::AS_RATE_LIMITED;
1556                         wfProfileOut( __METHOD__ . '-checks' );
1557                         wfProfileOut( __METHOD__ );
1558                         return $status;
1559                 }
1560
1561                 # If the article has been deleted while editing, don't save it without
1562                 # confirmation
1563                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1564                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1565                         wfProfileOut( __METHOD__ . '-checks' );
1566                         wfProfileOut( __METHOD__ );
1567                         return $status;
1568                 }
1569
1570                 wfProfileOut( __METHOD__ . '-checks' );
1571
1572                 # Load the page data from the master. If anything changes in the meantime,
1573                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1574                 $this->mArticle->loadPageData( 'fromdbmaster' );
1575                 $new = !$this->mArticle->exists();
1576
1577                 if ( $new ) {
1578                         // Late check for create permission, just in case *PARANOIA*
1579                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1580                                 $status->fatal( 'nocreatetext' );
1581                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1582                                 wfDebug( __METHOD__ . ": no create permission\n" );
1583                                 wfProfileOut( __METHOD__ );
1584                                 return $status;
1585                         }
1586
1587                         // Don't save a new page if it's blank or if it's a MediaWiki:
1588                         // message with content equivalent to default (allow empty pages
1589                         // in this case to disable messages, see bug 50124)
1590                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1591                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1592                                 $defaultText = $defaultMessageText;
1593                         } else {
1594                                 $defaultText = '';
1595                         }
1596
1597                         if ( $this->textbox1 === $defaultText ) {
1598                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1599                                 wfProfileOut( __METHOD__ );
1600                                 return $status;
1601                         }
1602
1603                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1604                                 wfProfileOut( __METHOD__ );
1605                                 return $status;
1606                         }
1607
1608                         $content = $textbox_content;
1609
1610                         $result['sectionanchor'] = '';
1611                         if ( $this->section == 'new' ) {
1612                                 if ( $this->sectiontitle !== '' ) {
1613                                         // Insert the section title above the content.
1614                                         $content = $content->addSectionHeader( $this->sectiontitle );
1615
1616                                         // Jump to the new section
1617                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1618
1619                                         // If no edit summary was specified, create one automatically from the section
1620                                         // title and have it link to the new section. Otherwise, respect the summary as
1621                                         // passed.
1622                                         if ( $this->summary === '' ) {
1623                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1624                                                 $this->summary = wfMessage( 'newsectionsummary' )
1625                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1626                                         }
1627                                 } elseif ( $this->summary !== '' ) {
1628                                         // Insert the section title above the content.
1629                                         $content = $content->addSectionHeader( $this->summary );
1630
1631                                         // Jump to the new section
1632                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1633
1634                                         // Create a link to the new section from the edit summary.
1635                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1636                                         $this->summary = wfMessage( 'newsectionsummary' )
1637                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1638                                 }
1639                         }
1640
1641                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1642
1643                 } else { # not $new
1644
1645                         # Article exists. Check for edit conflict.
1646
1647                         $this->mArticle->clear(); # Force reload of dates, etc.
1648                         $timestamp = $this->mArticle->getTimestamp();
1649
1650                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1651
1652                         if ( $timestamp != $this->edittime ) {
1653                                 $this->isConflict = true;
1654                                 if ( $this->section == 'new' ) {
1655                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1656                                                 $this->mArticle->getComment() == $this->summary ) {
1657                                                 // Probably a duplicate submission of a new comment.
1658                                                 // This can happen when squid resends a request after
1659                                                 // a timeout but the first one actually went through.
1660                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1661                                         } else {
1662                                                 // New comment; suppress conflict.
1663                                                 $this->isConflict = false;
1664                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1665                                         }
1666                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1667                                                         $wgUser->getId(), $this->edittime ) ) {
1668                                         # Suppress edit conflict with self, except for section edits where merging is required.
1669                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1670                                         $this->isConflict = false;
1671                                 }
1672                         }
1673
1674                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1675                         if ( $this->sectiontitle !== '' ) {
1676                                 $sectionTitle = $this->sectiontitle;
1677                         } else {
1678                                 $sectionTitle = $this->summary;
1679                         }
1680
1681                         $content = null;
1682
1683                         if ( $this->isConflict ) {
1684                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1685                                                 . " (article time '{$timestamp}')\n" );
1686
1687                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1688                         } else {
1689                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1690                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1691                         }
1692
1693                         if ( is_null( $content ) ) {
1694                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1695                                 $this->isConflict = true;
1696                                 $content = $textbox_content; // do not try to merge here!
1697                         } elseif ( $this->isConflict ) {
1698                                 # Attempt merge
1699                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1700                                         // Successful merge! Maybe we should tell the user the good news?
1701                                         $this->isConflict = false;
1702                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1703                                 } else {
1704                                         $this->section = '';
1705                                         $this->textbox1 = ContentHandler::getContentText( $content );
1706                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1707                                 }
1708                         }
1709
1710                         if ( $this->isConflict ) {
1711                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1712                                 wfProfileOut( __METHOD__ );
1713                                 return $status;
1714                         }
1715
1716                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1717                                 wfProfileOut( __METHOD__ );
1718                                 return $status;
1719                         }
1720
1721                         if ( $this->section == 'new' ) {
1722                                 // Handle the user preference to force summaries here
1723                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1724                                         $this->missingSummary = true;
1725                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1726                                         $status->value = self::AS_SUMMARY_NEEDED;
1727                                         wfProfileOut( __METHOD__ );
1728                                         return $status;
1729                                 }
1730
1731                                 // Do not allow the user to post an empty comment
1732                                 if ( $this->textbox1 == '' ) {
1733                                         $this->missingComment = true;
1734                                         $status->fatal( 'missingcommenttext' );
1735                                         $status->value = self::AS_TEXTBOX_EMPTY;
1736                                         wfProfileOut( __METHOD__ );
1737                                         return $status;
1738                                 }
1739                         } elseif ( !$this->allowBlankSummary
1740                                 && !$content->equals( $this->getOriginalContent() )
1741                                 && !$content->isRedirect()
1742                                 && md5( $this->summary ) == $this->autoSumm
1743                         ) {
1744                                 $this->missingSummary = true;
1745                                 $status->fatal( 'missingsummary' );
1746                                 $status->value = self::AS_SUMMARY_NEEDED;
1747                                 wfProfileOut( __METHOD__ );
1748                                 return $status;
1749                         }
1750
1751                         # All's well
1752                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1753                         $sectionanchor = '';
1754                         if ( $this->section == 'new' ) {
1755                                 if ( $this->sectiontitle !== '' ) {
1756                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1757                                         // If no edit summary was specified, create one automatically from the section
1758                                         // title and have it link to the new section. Otherwise, respect the summary as
1759                                         // passed.
1760                                         if ( $this->summary === '' ) {
1761                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1762                                                 $this->summary = wfMessage( 'newsectionsummary' )
1763                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1764                                         }
1765                                 } elseif ( $this->summary !== '' ) {
1766                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1767                                         # This is a new section, so create a link to the new section
1768                                         # in the revision summary.
1769                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1770                                         $this->summary = wfMessage( 'newsectionsummary' )
1771                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1772                                 }
1773                         } elseif ( $this->section != '' ) {
1774                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1775                                 # XXX: might be better to integrate this into Article::replaceSection
1776                                 # for duplicate heading checking and maybe parsing
1777                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1778                                 # we can't deal with anchors, includes, html etc in the header for now,
1779                                 # headline would need to be parsed to improve this
1780                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1781                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1782                                 }
1783                         }
1784                         $result['sectionanchor'] = $sectionanchor;
1785                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1786
1787                         // Save errors may fall down to the edit form, but we've now
1788                         // merged the section into full text. Clear the section field
1789                         // so that later submission of conflict forms won't try to
1790                         // replace that into a duplicated mess.
1791                         $this->textbox1 = $this->toEditText( $content );
1792                         $this->section = '';
1793
1794                         $status->value = self::AS_SUCCESS_UPDATE;
1795                 }
1796
1797                 // Check for length errors again now that the section is merged in
1798                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1799                 if ( $this->kblength > $wgMaxArticleSize ) {
1800                         $this->tooBig = true;
1801                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1802                         wfProfileOut( __METHOD__ );
1803                         return $status;
1804                 }
1805
1806                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1807                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1808                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1809                         ( $bot ? EDIT_FORCE_BOT : 0 );
1810
1811                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1812                                                                                                                         false, null, $this->contentFormat );
1813
1814                 if ( !$doEditStatus->isOK() ) {
1815                         // Failure from doEdit()
1816                         // Show the edit conflict page for certain recognized errors from doEdit(),
1817                         // but don't show it for errors from extension hooks
1818                         $errors = $doEditStatus->getErrorsArray();
1819                         if ( in_array( $errors[0][0],
1820                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1821                         ) {
1822                                 $this->isConflict = true;
1823                                 // Destroys data doEdit() put in $status->value but who cares
1824                                 $doEditStatus->value = self::AS_END;
1825                         }
1826                         wfProfileOut( __METHOD__ );
1827                         return $doEditStatus;
1828                 }
1829
1830                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1831                 if ( $result['nullEdit'] ) {
1832                         // We don't know if it was a null edit until now, so increment here
1833                         $wgUser->pingLimiter( 'linkpurge' );
1834                 }
1835                 $result['redirect'] = $content->isRedirect();
1836                 $this->updateWatchlist();
1837                 wfProfileOut( __METHOD__ );
1838                 return $status;
1839         }
1840
1841         /**
1842          * Register the change of watch status
1843          */
1844         protected function updateWatchlist() {
1845                 global $wgUser;
1846
1847                 if ( $wgUser->isLoggedIn()
1848                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1849                 ) {
1850                         $fname = __METHOD__;
1851                         $title = $this->mTitle;
1852                         $watch = $this->watchthis;
1853
1854                         // Do this in its own transaction to reduce contention...
1855                         $dbw = wfGetDB( DB_MASTER );
1856                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1857                                 $dbw->begin( $fname );
1858                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1859                                 $dbw->commit( $fname );
1860                         } );
1861                 }
1862         }
1863
1864         /**
1865          * Attempts to merge text content with base and current revisions
1866          *
1867          * @param $editText string
1868          *
1869          * @return bool
1870          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1871          */
1872         function mergeChangesInto( &$editText ) {
1873                 ContentHandler::deprecated( __METHOD__, "1.21" );
1874
1875                 $editContent = $this->toEditContent( $editText );
1876
1877                 $ok = $this->mergeChangesIntoContent( $editContent );
1878
1879                 if ( $ok ) {
1880                         $editText = $this->toEditText( $editContent );
1881                         return true;
1882                 }
1883                 return false;
1884         }
1885
1886         /**
1887          * Attempts to do 3-way merge of edit content with a base revision
1888          * and current content, in case of edit conflict, in whichever way appropriate
1889          * for the content type.
1890          *
1891          * @since 1.21
1892          *
1893          * @param $editContent
1894          *
1895          * @return bool
1896          */
1897         private function mergeChangesIntoContent( &$editContent ) {
1898                 wfProfileIn( __METHOD__ );
1899
1900                 $db = wfGetDB( DB_MASTER );
1901
1902                 // This is the revision the editor started from
1903                 $baseRevision = $this->getBaseRevision();
1904                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1905
1906                 if ( is_null( $baseContent ) ) {
1907                         wfProfileOut( __METHOD__ );
1908                         return false;
1909                 }
1910
1911                 // The current state, we want to merge updates into it
1912                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1913                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1914
1915                 if ( is_null( $currentContent ) ) {
1916                         wfProfileOut( __METHOD__ );
1917                         return false;
1918                 }
1919
1920                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1921
1922                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1923
1924                 if ( $result ) {
1925                         $editContent = $result;
1926                         wfProfileOut( __METHOD__ );
1927                         return true;
1928                 }
1929
1930                 wfProfileOut( __METHOD__ );
1931                 return false;
1932         }
1933
1934         /**
1935          * @return Revision
1936          */
1937         function getBaseRevision() {
1938                 if ( !$this->mBaseRevision ) {
1939                         $db = wfGetDB( DB_MASTER );
1940                         $this->mBaseRevision = Revision::loadFromTimestamp(
1941                                 $db, $this->mTitle, $this->edittime );
1942                 }
1943                 return $this->mBaseRevision;
1944         }
1945
1946         /**
1947          * Check given input text against $wgSpamRegex, and return the text of the first match.
1948          *
1949          * @param $text string
1950          *
1951          * @return string|bool matching string or false
1952          */
1953         public static function matchSpamRegex( $text ) {
1954                 global $wgSpamRegex;
1955                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1956                 $regexes = (array)$wgSpamRegex;
1957                 return self::matchSpamRegexInternal( $text, $regexes );
1958         }
1959
1960         /**
1961          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
1962          *
1963          * @param $text string
1964          *
1965          * @return string|bool matching string or false
1966          */
1967         public static function matchSummarySpamRegex( $text ) {
1968                 global $wgSummarySpamRegex;
1969                 $regexes = (array)$wgSummarySpamRegex;
1970                 return self::matchSpamRegexInternal( $text, $regexes );
1971         }
1972
1973         /**
1974          * @param $text string
1975          * @param $regexes array
1976          * @return bool|string
1977          */
1978         protected static function matchSpamRegexInternal( $text, $regexes ) {
1979                 foreach ( $regexes as $regex ) {
1980                         $matches = array();
1981                         if ( preg_match( $regex, $text, $matches ) ) {
1982                                 return $matches[0];
1983                         }
1984                 }
1985                 return false;
1986         }
1987
1988         function setHeaders() {
1989                 global $wgOut, $wgUser;
1990
1991                 $wgOut->addModules( 'mediawiki.action.edit' );
1992                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
1993
1994                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1995                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1996                 }
1997
1998                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
1999                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2000                 }
2001
2002                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2003
2004                 # Enabled article-related sidebar, toplinks, etc.
2005                 $wgOut->setArticleRelated( true );
2006
2007                 $contextTitle = $this->getContextTitle();
2008                 if ( $this->isConflict ) {
2009                         $msg = 'editconflict';
2010                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2011                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2012                 } else {
2013                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
2014                                 'editing' : 'creating';
2015                 }
2016                 # Use the title defined by DISPLAYTITLE magic word when present
2017                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2018                 if ( $displayTitle === false ) {
2019                         $displayTitle = $contextTitle->getPrefixedText();
2020                 }
2021                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2022         }
2023
2024         /**
2025          * Show all applicable editing introductions
2026          */
2027         protected function showIntro() {
2028                 global $wgOut, $wgUser;
2029                 if ( $this->suppressIntro ) {
2030                         return;
2031                 }
2032
2033                 $namespace = $this->mTitle->getNamespace();
2034
2035                 if ( $namespace == NS_MEDIAWIKI ) {
2036                         # Show a warning if editing an interface message
2037                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2038                 } elseif ( $namespace == NS_FILE ) {
2039                         # Show a hint to shared repo
2040                         $file = wfFindFile( $this->mTitle );
2041                         if ( $file && !$file->isLocal() ) {
2042                                 $descUrl = $file->getDescriptionUrl();
2043                                 # there must be a description url to show a hint to shared repo
2044                                 if ( $descUrl ) {
2045                                         if ( !$this->mTitle->exists() ) {
2046                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2047                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2048                                                 ) );
2049                                         } else {
2050                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2051                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2052                                                 ) );
2053                                         }
2054                                 }
2055                         }
2056                 }
2057
2058                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2059                 # Show log extract when the user is currently blocked
2060                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2061                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2062                         $username = $parts[0];
2063                         $user = User::newFromName( $username, false /* allow IP users*/ );
2064                         $ip = User::isIP( $username );
2065                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2066                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2067                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2068                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
2069                                 LogEventsList::showLogExtract(
2070                                         $wgOut,
2071                                         'block',
2072                                         $user->getUserPage(),
2073                                         '',
2074                                         array(
2075                                                 'lim' => 1,
2076                                                 'showIfEmpty' => false,
2077                                                 'msgKey' => array(
2078                                                         'blocked-notice-logextract',
2079                                                         $user->getName() # Support GENDER in notice
2080                                                 )
2081                                         )
2082                                 );
2083                         }
2084                 }
2085                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2086                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2087                         $helpLink = Skin::makeInternalOrExternalUrl(
2088                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2089                         );
2090                         if ( $wgUser->isLoggedIn() ) {
2091                                 $wgOut->wrapWikiMsg(
2092                                         // Suppress the external link icon, consider the help url an internal one
2093                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2094                                         array(
2095                                                 'newarticletext',
2096                                                 $helpLink
2097                                         )
2098                                 );
2099                         } else {
2100                                 $wgOut->wrapWikiMsg(
2101                                         // Suppress the external link icon, consider the help url an internal one
2102                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2103                                         array(
2104                                                 'newarticletextanon',
2105                                                 $helpLink
2106                                         )
2107                                 );
2108                         }
2109                 }
2110                 # Give a notice if the user is editing a deleted/moved page...
2111                 if ( !$this->mTitle->exists() ) {
2112                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2113                                 '',
2114                                 array(
2115                                         'lim' => 10,
2116                                         'conds' => array( "log_action != 'revision'" ),
2117                                         'showIfEmpty' => false,
2118                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2119                                 )
2120                         );
2121                 }
2122         }
2123
2124         /**
2125          * Attempt to show a custom editing introduction, if supplied
2126          *
2127          * @return bool
2128          */
2129         protected function showCustomIntro() {
2130                 if ( $this->editintro ) {
2131                         $title = Title::newFromText( $this->editintro );
2132                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2133                                 global $wgOut;
2134                                 // Added using template syntax, to take <noinclude>'s into account.
2135                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2136                                 return true;
2137                         }
2138                 }
2139                 return false;
2140         }
2141
2142         /**
2143          * Gets an editable textual representation of $content.
2144          * The textual representation can be turned by into a Content object by the
2145          * toEditContent() method.
2146          *
2147          * If $content is null or false or a string, $content is returned unchanged.
2148          *
2149          * If the given Content object is not of a type that can be edited using the text base EditPage,
2150          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2151          * content.
2152          *
2153          * @param Content|null|bool|string $content
2154          * @return String the editable text form of the content.
2155          *
2156          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
2157          */
2158         protected function toEditText( $content ) {
2159                 if ( $content === null || $content === false ) {
2160                         return $content;
2161                 }
2162
2163                 if ( is_string( $content ) ) {
2164                         return $content;
2165                 }
2166
2167                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2168                         throw new MWException( 'This content model is not supported: '
2169                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2170                 }
2171
2172                 return $content->serialize( $this->contentFormat );
2173         }
2174
2175         /**
2176          * Turns the given text into a Content object by unserializing it.
2177          *
2178          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2179          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2180          * content.
2181          *
2182          * @param string|null|bool $text Text to unserialize
2183          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2184          *                 returned instead.
2185          *
2186          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2187          *          and $this->allowNonTextContent is not true.
2188          */
2189         protected function toEditContent( $text ) {
2190                 if ( $text === false || $text === null ) {
2191                         return $text;
2192                 }
2193
2194                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2195                         $this->contentModel, $this->contentFormat );
2196
2197                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2198                         throw new MWException( 'This content model is not supported: '
2199                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2200                 }
2201
2202                 return $content;
2203         }
2204
2205         /**
2206          * Send the edit form and related headers to $wgOut
2207          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2208          *     during form output near the top, for captchas and the like.
2209          */
2210         function showEditForm( $formCallback = null ) {
2211                 global $wgOut, $wgUser;
2212
2213                 wfProfileIn( __METHOD__ );
2214
2215                 # need to parse the preview early so that we know which templates are used,
2216                 # otherwise users with "show preview after edit box" will get a blank list
2217                 # we parse this near the beginning so that setHeaders can do the title
2218                 # setting work instead of leaving it in getPreviewText
2219                 $previewOutput = '';
2220                 if ( $this->formtype == 'preview' ) {
2221                         $previewOutput = $this->getPreviewText();
2222                 }
2223
2224                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2225
2226                 $this->setHeaders();
2227
2228                 if ( $this->showHeader() === false ) {
2229                         wfProfileOut( __METHOD__ );
2230                         return;
2231                 }
2232
2233                 $wgOut->addHTML( $this->editFormPageTop );
2234
2235                 if ( $wgUser->getOption( 'previewontop' ) ) {
2236                         $this->displayPreviewArea( $previewOutput, true );
2237                 }
2238
2239                 $wgOut->addHTML( $this->editFormTextTop );
2240
2241                 $showToolbar = true;
2242                 if ( $this->wasDeletedSinceLastEdit() ) {
2243                         if ( $this->formtype == 'save' ) {
2244                                 // Hide the toolbar and edit area, user can click preview to get it back
2245                                 // Add an confirmation checkbox and explanation.
2246                                 $showToolbar = false;
2247                         } else {
2248                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2249                                         'deletedwhileediting' );
2250                         }
2251                 }
2252
2253                 // @todo add EditForm plugin interface and use it here!
2254                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2255                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2256                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2257                         'enctype' => 'multipart/form-data' ) ) );
2258
2259                 if ( is_callable( $formCallback ) ) {
2260                         call_user_func_array( $formCallback, array( &$wgOut ) );
2261                 }
2262
2263                 // Add an empty field to trip up spambots
2264                 $wgOut->addHTML(
2265                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2266                         . Html::rawElement( 'label', array( 'for' => 'wpAntiSpam' ), wfMessage( 'simpleantispam-label' )->parse() )
2267                         . Xml::element( 'input', array( 'type' => 'text', 'name' => 'wpAntispam', 'id' => 'wpAntispam', 'value' => '' ) )
2268                         . Xml::closeElement( 'div' )
2269                 );
2270
2271                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2272
2273                 // Put these up at the top to ensure they aren't lost on early form submission
2274                 $this->showFormBeforeText();
2275
2276                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2277                         $username = $this->lastDelete->user_name;
2278                         $comment = $this->lastDelete->log_comment;
2279
2280                         // It is better to not parse the comment at all than to have templates expanded in the middle
2281                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2282                         $key = $comment === ''
2283                                 ? 'confirmrecreate-noreason'
2284                                 : 'confirmrecreate';
2285                         $wgOut->addHTML(
2286                                 '<div class="mw-confirm-recreate">' .
2287                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2288                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2289                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2290                                 ) .
2291                                 '</div>'
2292                         );
2293                 }
2294
2295                 # When the summary is hidden, also hide them on preview/show changes
2296                 if ( $this->nosummary ) {
2297                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2298                 }
2299
2300                 # If a blank edit summary was previously provided, and the appropriate
2301                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2302                 # user being bounced back more than once in the event that a summary
2303                 # is not required.
2304                 #####
2305                 # For a bit more sophisticated detection of blank summaries, hash the
2306                 # automatic one and pass that in the hidden field wpAutoSummary.
2307                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2308                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2309                 }
2310
2311                 if ( $this->undidRev ) {
2312                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2313                 }
2314
2315                 if ( $this->hasPresetSummary ) {
2316                         // If a summary has been preset using &summary= we don't want to prompt for
2317                         // a different summary. Only prompt for a summary if the summary is blanked.
2318                         // (Bug 17416)
2319                         $this->autoSumm = md5( '' );
2320                 }
2321
2322                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2323                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2324
2325                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2326
2327                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2328                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2329
2330                 if ( $this->section == 'new' ) {
2331                         $this->showSummaryInput( true, $this->summary );
2332                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2333                 }
2334
2335                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2336
2337                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2338                         $wgOut->addHTML( EditPage::getEditToolbar() );
2339                 }
2340
2341                 if ( $this->isConflict ) {
2342                         // In an edit conflict bypass the overridable content form method
2343                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2344                         // resolved between page source edits and custom ui edits using the
2345                         // custom edit ui.
2346                         $this->textbox2 = $this->textbox1;
2347
2348                         $content = $this->getCurrentContent();
2349                         $this->textbox1 = $this->toEditText( $content );
2350
2351                         $this->showTextbox1();
2352                 } else {
2353                         $this->showContentForm();
2354                 }
2355
2356                 $wgOut->addHTML( $this->editFormTextAfterContent );
2357
2358                 $this->showStandardInputs();
2359
2360                 $this->showFormAfterText();
2361
2362                 $this->showTosSummary();
2363
2364                 $this->showEditTools();
2365
2366                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2367
2368                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2369                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2370
2371                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2372                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2373
2374                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2375                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2376
2377                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2378
2379                 if ( $this->isConflict ) {
2380                         try {
2381                                 $this->showConflict();
2382                         } catch ( MWContentSerializationException $ex ) {
2383                                 // this can't really happen, but be nice if it does.
2384                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2385                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2386                         }
2387                 }
2388
2389                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2390
2391                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2392                         $this->displayPreviewArea( $previewOutput, false );
2393                 }
2394
2395                 wfProfileOut( __METHOD__ );
2396         }
2397
2398         /**
2399          * Extract the section title from current section text, if any.
2400          *
2401          * @param string $text
2402          * @return Mixed|string or false
2403          */
2404         public static function extractSectionTitle( $text ) {
2405                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2406                 if ( !empty( $matches[2] ) ) {
2407                         global $wgParser;
2408                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2409                 } else {
2410                         return false;
2411                 }
2412         }
2413
2414         protected function showHeader() {
2415                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2416
2417                 if ( $this->mTitle->isTalkPage() ) {
2418                         $wgOut->addWikiMsg( 'talkpagetext' );
2419                 }
2420
2421                 // Add edit notices
2422                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2423
2424                 if ( $this->isConflict ) {
2425                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2426                         $this->edittime = $this->mArticle->getTimestamp();
2427                 } else {
2428                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2429                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2430                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2431                                 // Someone is welcome to try refactoring though
2432                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2433                                 return false;
2434                         }
2435
2436                         if ( $this->section != '' && $this->section != 'new' ) {
2437                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2438                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2439                                         if ( $sectionTitle !== false ) {
2440                                                 $this->summary = "/* $sectionTitle */ ";
2441                                         }
2442                                 }
2443                         }
2444
2445                         if ( $this->missingComment ) {
2446                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2447                         }
2448
2449                         if ( $this->missingSummary && $this->section != 'new' ) {
2450                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2451                         }
2452
2453                         if ( $this->missingSummary && $this->section == 'new' ) {
2454                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2455                         }
2456
2457                         if ( $this->hookError !== '' ) {
2458                                 $wgOut->addWikiText( $this->hookError );
2459                         }
2460
2461                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2462                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2463                         }
2464
2465                         if ( $this->section != 'new' ) {
2466                                 $revision = $this->mArticle->getRevisionFetched();
2467                                 if ( $revision ) {
2468                                         // Let sysop know that this will make private content public if saved
2469
2470                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2471                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2472                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2473                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2474                                         }
2475
2476                                         if ( !$revision->isCurrent() ) {
2477                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2478                                                 $wgOut->addWikiMsg( 'editingold' );
2479                                         }
2480                                 } elseif ( $this->mTitle->exists() ) {
2481                                         // Something went wrong
2482
2483                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2484                                                 array( 'missing-revision', $this->oldid ) );
2485                                 }
2486                         }
2487                 }
2488
2489                 if ( wfReadOnly() ) {
2490                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2491                 } elseif ( $wgUser->isAnon() ) {
2492                         if ( $this->formtype != 'preview' ) {
2493                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2494                         } else {
2495                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2496                         }
2497                 } else {
2498                         if ( $this->isCssJsSubpage ) {
2499                                 # Check the skin exists
2500                                 if ( $this->isWrongCaseCssJsPage ) {
2501                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2502                                 }
2503                                 if ( $this->formtype !== 'preview' ) {
2504                                         if ( $this->isCssSubpage ) {
2505                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2506                                         }
2507
2508                                         if ( $this->isJsSubpage ) {
2509                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2510                                         }
2511                                 }
2512                         }
2513                 }
2514
2515                 if ( $this->mTitle->isProtected( 'edit' ) &&
2516                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2517                 ) {
2518                         # Is the title semi-protected?
2519                         if ( $this->mTitle->isSemiProtected() ) {
2520                                 $noticeMsg = 'semiprotectedpagewarning';
2521                         } else {
2522                                 # Then it must be protected based on static groups (regular)
2523                                 $noticeMsg = 'protectedpagewarning';
2524                         }
2525                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2526                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2527                 }
2528                 if ( $this->mTitle->isCascadeProtected() ) {
2529                         # Is this page under cascading protection from some source pages?
2530                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2531                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2532                         $cascadeSourcesCount = count( $cascadeSources );
2533                         if ( $cascadeSourcesCount > 0 ) {
2534                                 # Explain, and list the titles responsible
2535                                 foreach ( $cascadeSources as $page ) {
2536                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2537                                 }
2538                         }
2539                         $notice .= '</div>';
2540                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2541                 }
2542                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2543                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2544                                 array( 'lim' => 1,
2545                                         'showIfEmpty' => false,
2546                                         'msgKey' => array( 'titleprotectedwarning' ),
2547                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2548                 }
2549
2550                 if ( $this->kblength === false ) {
2551                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2552                 }
2553
2554                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2555                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2556                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2557                 } else {
2558                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2559                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2560                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2561                                 );
2562                         }
2563                 }
2564                 # Add header copyright warning
2565                 $this->showHeaderCopyrightWarning();
2566         }
2567
2568         /**
2569          * Standard summary input and label (wgSummary), abstracted so EditPage
2570          * subclasses may reorganize the form.
2571          * Note that you do not need to worry about the label's for=, it will be
2572          * inferred by the id given to the input. You can remove them both by
2573          * passing array( 'id' => false ) to $userInputAttrs.
2574          *
2575          * @param string $summary The value of the summary input
2576          * @param string $labelText The html to place inside the label
2577          * @param array $inputAttrs of attrs to use on the input
2578          * @param array $spanLabelAttrs of attrs to use on the span inside the label
2579          *
2580          * @return array An array in the format array( $label, $input )
2581          */
2582         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2583                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2584                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2585                         'id' => 'wpSummary',
2586                         'maxlength' => '200',
2587                         'tabindex' => '1',
2588                         'size' => 60,
2589                         'spellcheck' => 'true',
2590                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2591
2592                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2593                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2594                         'id' => "wpSummaryLabel"
2595                 );
2596
2597                 $label = null;
2598                 if ( $labelText ) {
2599                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2600                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2601                 }
2602
2603                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2604
2605                 return array( $label, $input );
2606         }
2607
2608         /**
2609          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2610          *                          up top, or false if this is the comment summary
2611          *                          down below the textarea
2612          * @param string $summary The text of the summary to display
2613          * @return String
2614          */
2615         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2616                 global $wgOut, $wgContLang;
2617                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2618                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2619                 if ( $isSubjectPreview ) {
2620                         if ( $this->nosummary ) {
2621                                 return;
2622                         }
2623                 } else {
2624                         if ( !$this->mShowSummaryField ) {
2625                                 return;
2626                         }
2627                 }
2628                 $summary = $wgContLang->recodeForEdit( $summary );
2629                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2630                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2631                 $wgOut->addHTML( "{$label} {$input}" );
2632         }
2633
2634         /**
2635          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2636          *                          up top, or false if this is the comment summary
2637          *                          down below the textarea
2638          * @param string $summary the text of the summary to display
2639          * @return String
2640          */
2641         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2642                 // avoid spaces in preview, gets always trimmed on save
2643                 $summary = trim( $summary );
2644                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2645                         return "";
2646                 }
2647
2648                 global $wgParser;
2649
2650                 if ( $isSubjectPreview ) {
2651                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2652                                 ->inContentLanguage()->text();
2653                 }
2654
2655                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2656
2657                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2658                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2659         }
2660
2661         protected function showFormBeforeText() {
2662                 global $wgOut;
2663                 $section = htmlspecialchars( $this->section );
2664                 $wgOut->addHTML( <<<HTML
2665 <input type='hidden' value="{$section}" name="wpSection" />
2666 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2667 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2668 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2669
2670 HTML
2671                 );
2672                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2673                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2674                 }
2675         }
2676
2677         protected function showFormAfterText() {
2678                 global $wgOut, $wgUser;
2679                 /**
2680                  * To make it harder for someone to slip a user a page
2681                  * which submits an edit form to the wiki without their
2682                  * knowledge, a random token is associated with the login
2683                  * session. If it's not passed back with the submission,
2684                  * we won't save the page, or render user JavaScript and
2685                  * CSS previews.
2686                  *
2687                  * For anon editors, who may not have a session, we just
2688                  * include the constant suffix to prevent editing from
2689                  * broken text-mangling proxies.
2690                  */
2691                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2692         }
2693
2694         /**
2695          * Subpage overridable method for printing the form for page content editing
2696          * By default this simply outputs wpTextbox1
2697          * Subclasses can override this to provide a custom UI for editing;
2698          * be it a form, or simply wpTextbox1 with a modified content that will be
2699          * reverse modified when extracted from the post data.
2700          * Note that this is basically the inverse for importContentFormData
2701          */
2702         protected function showContentForm() {
2703                 $this->showTextbox1();
2704         }
2705
2706         /**
2707          * Method to output wpTextbox1
2708          * The $textoverride method can be used by subclasses overriding showContentForm
2709          * to pass back to this method.
2710          *
2711          * @param array $customAttribs of html attributes to use in the textarea
2712          * @param string $textoverride optional text to override $this->textarea1 with
2713          */
2714         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2715                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2716                         $attribs = array( 'style' => 'display:none;' );
2717                 } else {
2718                         $classes = array(); // Textarea CSS
2719                         if ( $this->mTitle->isProtected( 'edit' ) &&
2720                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2721                         ) {
2722                                 # Is the title semi-protected?
2723                                 if ( $this->mTitle->isSemiProtected() ) {
2724                                         $classes[] = 'mw-textarea-sprotected';
2725                                 } else {
2726                                         # Then it must be protected based on static groups (regular)
2727                                         $classes[] = 'mw-textarea-protected';
2728                                 }
2729                                 # Is the title cascade-protected?
2730                                 if ( $this->mTitle->isCascadeProtected() ) {
2731                                         $classes[] = 'mw-textarea-cprotected';
2732                                 }
2733                         }
2734
2735                         $attribs = array( 'tabindex' => 1 );
2736
2737                         if ( is_array( $customAttribs ) ) {
2738                                 $attribs += $customAttribs;
2739                         }
2740
2741                         if ( count( $classes ) ) {
2742                                 if ( isset( $attribs['class'] ) ) {
2743                                         $classes[] = $attribs['class'];
2744                                 }
2745                                 $attribs['class'] = implode( ' ', $classes );
2746                         }
2747                 }
2748
2749                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2750         }
2751
2752         protected function showTextbox2() {
2753                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2754         }
2755
2756         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2757                 global $wgOut, $wgUser;
2758
2759                 $wikitext = $this->safeUnicodeOutput( $text );
2760                 if ( strval( $wikitext ) !== '' ) {
2761                         // Ensure there's a newline at the end, otherwise adding lines
2762                         // is awkward.
2763                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2764                         // mode will show an extra newline. A bit annoying.
2765                         $wikitext .= "\n";
2766                 }
2767
2768                 $attribs = $customAttribs + array(
2769                         'accesskey' => ',',
2770                         'id' => $name,
2771                         'cols' => $wgUser->getIntOption( 'cols' ),
2772                         'rows' => $wgUser->getIntOption( 'rows' ),
2773                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2774                 );
2775
2776                 $pageLang = $this->mTitle->getPageLanguage();
2777                 $attribs['lang'] = $pageLang->getCode();
2778                 $attribs['dir'] = $pageLang->getDir();
2779
2780                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2781         }
2782
2783         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2784                 global $wgOut;
2785                 $classes = array();
2786                 if ( $isOnTop ) {
2787                         $classes[] = 'ontop';
2788                 }
2789
2790                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2791
2792                 if ( $this->formtype != 'preview' ) {
2793                         $attribs['style'] = 'display: none;';
2794                 }
2795
2796                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2797
2798                 if ( $this->formtype == 'preview' ) {
2799                         $this->showPreview( $previewOutput );
2800                 }
2801
2802                 $wgOut->addHTML( '</div>' );
2803
2804                 if ( $this->formtype == 'diff' ) {
2805                         try {
2806                                 $this->showDiff();
2807                         } catch ( MWContentSerializationException $ex ) {
2808                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2809                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2810                         }
2811                 }
2812         }
2813
2814         /**
2815          * Append preview output to $wgOut.
2816          * Includes category rendering if this is a category page.
2817          *
2818          * @param string $text the HTML to be output for the preview.
2819          */
2820         protected function showPreview( $text ) {
2821                 global $wgOut;
2822                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2823                         $this->mArticle->openShowCategory();
2824                 }
2825                 # This hook seems slightly odd here, but makes things more
2826                 # consistent for extensions.
2827                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2828                 $wgOut->addHTML( $text );
2829                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2830                         $this->mArticle->closeShowCategory();
2831                 }
2832         }
2833
2834         /**
2835          * Get a diff between the current contents of the edit box and the
2836          * version of the page we're editing from.
2837          *
2838          * If this is a section edit, we'll replace the section as for final
2839          * save and then make a comparison.
2840          */
2841         function showDiff() {
2842                 global $wgUser, $wgContLang, $wgOut;
2843
2844                 $oldtitlemsg = 'currentrev';
2845                 # if message does not exist, show diff against the preloaded default
2846                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2847                         $oldtext = $this->mTitle->getDefaultMessageText();
2848                         if ( $oldtext !== false ) {
2849                                 $oldtitlemsg = 'defaultmessagetext';
2850                                 $oldContent = $this->toEditContent( $oldtext );
2851                         } else {
2852                                 $oldContent = null;
2853                         }
2854                 } else {
2855                         $oldContent = $this->getCurrentContent();
2856                 }
2857
2858                 $textboxContent = $this->toEditContent( $this->textbox1 );
2859
2860                 $newContent = $this->mArticle->replaceSectionContent(
2861                                                         $this->section, $textboxContent,
2862                                                         $this->summary, $this->edittime );
2863
2864                 if ( $newContent ) {
2865                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2866                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2867
2868                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2869                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2870                 }
2871
2872                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2873                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2874                         $newtitle = wfMessage( 'yourtext' )->parse();
2875
2876                         if ( !$oldContent ) {
2877                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2878                         }
2879
2880                         if ( !$newContent ) {
2881                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2882                         }
2883
2884                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2885                         $de->setContent( $oldContent, $newContent );
2886
2887                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2888                         $de->showDiffStyle();
2889                 } else {
2890                         $difftext = '';
2891                 }
2892
2893                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2894         }
2895
2896         /**
2897          * Show the header copyright warning.
2898          */
2899         protected function showHeaderCopyrightWarning() {
2900                 $msg = 'editpage-head-copy-warn';
2901                 if ( !wfMessage( $msg )->isDisabled() ) {
2902                         global $wgOut;
2903                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2904                                 'editpage-head-copy-warn' );
2905                 }
2906         }
2907
2908         /**
2909          * Give a chance for site and per-namespace customizations of
2910          * terms of service summary link that might exist separately
2911          * from the copyright notice.
2912          *
2913          * This will display between the save button and the edit tools,
2914          * so should remain short!
2915          */
2916         protected function showTosSummary() {
2917                 $msg = 'editpage-tos-summary';
2918                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2919                 if ( !wfMessage( $msg )->isDisabled() ) {
2920                         global $wgOut;
2921                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2922                         $wgOut->addWikiMsg( $msg );
2923                         $wgOut->addHTML( '</div>' );
2924                 }
2925         }
2926
2927         protected function showEditTools() {
2928                 global $wgOut;
2929                 $wgOut->addHTML( '<div class="mw-editTools">' .
2930                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2931                         '</div>' );
2932         }
2933
2934         /**
2935          * Get the copyright warning
2936          *
2937          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2938          */
2939         protected function getCopywarn() {
2940                 return self::getCopyrightWarning( $this->mTitle );
2941         }
2942
2943         /**
2944          * Get the copyright warning, by default returns wikitext
2945          *
2946          * @param Title $title
2947          * @param string $format output format, valid values are any function of
2948          *                       a Message object
2949          * @return string
2950          */
2951         public static function getCopyrightWarning( $title, $format = 'plain' ) {
2952                 global $wgRightsText;
2953                 if ( $wgRightsText ) {
2954                         $copywarnMsg = array( 'copyrightwarning',
2955                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2956                                 $wgRightsText );
2957                 } else {
2958                         $copywarnMsg = array( 'copyrightwarning2',
2959                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2960                 }
2961                 // Allow for site and per-namespace customization of contribution/copyright notice.
2962                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2963
2964                 return "<div id=\"editpage-copywarn\">\n" .
2965                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
2966         }
2967
2968         /**
2969          * Get the Limit report for page previews
2970          *
2971          * @since 1.22
2972          * @param ParserOutput $output ParserOutput object from the parse
2973          * @return string HTML
2974          */
2975         public static function getPreviewLimitReport( $output ) {
2976                 if ( !$output || !$output->getLimitReportData() ) {
2977                         return '';
2978                 }
2979
2980                 wfProfileIn( __METHOD__ );
2981
2982                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
2983                         wfMessage( 'limitreport-title' )->parseAsBlock()
2984                 );
2985
2986                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
2987                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
2988
2989                 $limitReport .= Html::openElement( 'table', array(
2990                         'class' => 'preview-limit-report wikitable'
2991                 ) ) .
2992                         Html::openElement( 'tbody' );
2993
2994                 foreach ( $output->getLimitReportData() as $key => $value ) {
2995                         if ( wfRunHooks( 'ParserLimitReportFormat',
2996                                 array( $key, &$value, &$limitReport, true, true )
2997                         ) ) {
2998                                 $keyMsg = wfMessage( $key );
2999                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3000                                 if ( !$valueMsg->exists() ) {
3001                                         $valueMsg = new RawMessage( '$1' );
3002                                 }
3003                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3004                                         $limitReport .= Html::openElement( 'tr' ) .
3005                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3006                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3007                                                 Html::closeElement( 'tr' );
3008                                 }
3009                         }
3010                 }
3011
3012                 $limitReport .= Html::closeElement( 'tbody' ) .
3013                         Html::closeElement( 'table' ) .
3014                         Html::closeElement( 'div' );
3015
3016                 wfProfileOut( __METHOD__ );
3017
3018                 return $limitReport;
3019         }
3020
3021         protected function showStandardInputs( &$tabindex = 2 ) {
3022                 global $wgOut;
3023                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3024
3025                 if ( $this->section != 'new' ) {
3026                         $this->showSummaryInput( false, $this->summary );
3027                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3028                 }
3029
3030                 $checkboxes = $this->getCheckboxes( $tabindex,
3031                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3032                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3033
3034                 // Show copyright warning.
3035                 $wgOut->addWikiText( $this->getCopywarn() );
3036                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3037
3038                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3039                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3040
3041                 $cancel = $this->getCancelLink();
3042                 if ( $cancel !== '' ) {
3043                         $cancel .= Html::element( 'span',
3044                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3045                                 wfMessage( 'pipe-separator' )->text() );
3046                 }
3047                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
3048                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3049                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3050                         wfMessage( 'newwindow' )->parse();
3051                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3052                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3053                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3054                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3055                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3056         }
3057
3058         /**
3059          * Show an edit conflict. textbox1 is already shown in showEditForm().
3060          * If you want to use another entry point to this function, be careful.
3061          */
3062         protected function showConflict() {
3063                 global $wgOut;
3064
3065                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3066                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3067
3068                         $content1 = $this->toEditContent( $this->textbox1 );
3069                         $content2 = $this->toEditContent( $this->textbox2 );
3070
3071                         $handler = ContentHandler::getForModelID( $this->contentModel );
3072                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3073                         $de->setContent( $content2, $content1 );
3074                         $de->showDiff(
3075                                 wfMessage( 'yourtext' )->parse(),
3076                                 wfMessage( 'storedversion' )->text()
3077                         );
3078
3079                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3080                         $this->showTextbox2();
3081                 }
3082         }
3083
3084         /**
3085          * @return string
3086          */
3087         public function getCancelLink() {
3088                 $cancelParams = array();
3089                 if ( !$this->isConflict && $this->oldid > 0 ) {
3090                         $cancelParams['oldid'] = $this->oldid;
3091                 }
3092
3093                 return Linker::linkKnown(
3094                         $this->getContextTitle(),
3095                         wfMessage( 'cancel' )->parse(),
3096                         array( 'id' => 'mw-editform-cancel' ),
3097                         $cancelParams
3098                 );
3099         }
3100
3101         /**
3102          * Returns the URL to use in the form's action attribute.
3103          * This is used by EditPage subclasses when simply customizing the action
3104          * variable in the constructor is not enough. This can be used when the
3105          * EditPage lives inside of a Special page rather than a custom page action.
3106          *
3107          * @param $title Title object for which is being edited (where we go to for &action= links)
3108          * @return string
3109          */
3110         protected function getActionURL( Title $title ) {
3111                 return $title->getLocalURL( array( 'action' => $this->action ) );
3112         }
3113
3114         /**
3115          * Check if a page was deleted while the user was editing it, before submit.
3116          * Note that we rely on the logging table, which hasn't been always there,
3117          * but that doesn't matter, because this only applies to brand new
3118          * deletes.
3119          */
3120         protected function wasDeletedSinceLastEdit() {
3121                 if ( $this->deletedSinceEdit !== null ) {
3122                         return $this->deletedSinceEdit;
3123                 }
3124
3125                 $this->deletedSinceEdit = false;
3126
3127                 if ( $this->mTitle->isDeletedQuick() ) {
3128                         $this->lastDelete = $this->getLastDelete();
3129                         if ( $this->lastDelete ) {
3130                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3131                                 if ( $deleteTime > $this->starttime ) {
3132                                         $this->deletedSinceEdit = true;
3133                                 }
3134                         }
3135                 }
3136
3137                 return $this->deletedSinceEdit;
3138         }
3139
3140         protected function getLastDelete() {
3141                 $dbr = wfGetDB( DB_SLAVE );
3142                 $data = $dbr->selectRow(
3143                         array( 'logging', 'user' ),
3144                         array(
3145                                 'log_type',
3146                                 'log_action',
3147                                 'log_timestamp',
3148                                 'log_user',
3149                                 'log_namespace',
3150                                 'log_title',
3151                                 'log_comment',
3152                                 'log_params',
3153                                 'log_deleted',
3154                                 'user_name'
3155                         ), array(
3156                                 'log_namespace' => $this->mTitle->getNamespace(),
3157                                 'log_title' => $this->mTitle->getDBkey(),
3158                                 'log_type' => 'delete',
3159                                 'log_action' => 'delete',
3160                                 'user_id=log_user'
3161                         ),
3162                         __METHOD__,
3163                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3164                 );
3165                 // Quick paranoid permission checks...
3166                 if ( is_object( $data ) ) {
3167                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3168                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3169                         }
3170
3171                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3172                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3173                         }
3174                 }
3175                 return $data;
3176         }
3177
3178         /**
3179          * Get the rendered text for previewing.
3180          * @throws MWException
3181          * @return string
3182          */
3183         function getPreviewText() {
3184                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3185
3186                 wfProfileIn( __METHOD__ );
3187
3188                 if ( $wgRawHtml && !$this->mTokenOk ) {
3189                         // Could be an offsite preview attempt. This is very unsafe if
3190                         // HTML is enabled, as it could be an attack.
3191                         $parsedNote = '';
3192                         if ( $this->textbox1 !== '' ) {
3193                                 // Do not put big scary notice, if previewing the empty
3194                                 // string, which happens when you initially edit
3195                                 // a category page, due to automatic preview-on-open.
3196                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3197                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3198                         }
3199                         wfProfileOut( __METHOD__ );
3200                         return $parsedNote;
3201                 }
3202
3203                 $note = '';
3204
3205                 try {
3206                         $content = $this->toEditContent( $this->textbox1 );
3207
3208                         $previewHTML = '';
3209                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
3210                                 wfProfileOut( __METHOD__ );
3211                                 return $previewHTML;
3212                         }
3213
3214                         # provide a anchor link to the editform
3215                         $continueEditing = '<span class="mw-continue-editing">' .
3216                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3217                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3218                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3219                                 if ( $this->mTokenOkExceptSuffix ) {
3220                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3221
3222                                 } else {
3223                                         $note = wfMessage( 'session_fail_preview' )->plain();
3224                                 }
3225                         } elseif ( $this->incompleteForm ) {
3226                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3227                         } else {
3228                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3229                         }
3230
3231                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3232                         $parserOptions->setEditSection( false );
3233                         $parserOptions->setIsPreview( true );
3234                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3235
3236                         # don't parse non-wikitext pages, show message about preview
3237                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3238                                 if ( $this->mTitle->isCssJsSubpage() ) {
3239                                         $level = 'user';
3240                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3241                                         $level = 'site';
3242                                 } else {
3243                                         $level = false;
3244                                 }
3245
3246                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3247                                         $format = 'css';
3248                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3249                                         $format = 'js';
3250                                 } else {
3251                                         $format = false;
3252                                 }
3253
3254                                 # Used messages to make sure grep find them:
3255                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3256                                 if ( $level && $format ) {
3257                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3258                                                 wfMessage( "{$level}{$format}preview" )->text() .
3259                                                 ' ' . $continueEditing . "</div>";
3260                                 }
3261                         }
3262
3263                         # If we're adding a comment, we need to show the
3264                         # summary as the headline
3265                         if ( $this->section === "new" && $this->summary !== "" ) {
3266                                 $content = $content->addSectionHeader( $this->summary );
3267                         }
3268
3269                         $hook_args = array( $this, &$content );
3270                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3271                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3272
3273                         $parserOptions->enableLimitReport();
3274
3275                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3276                         # But it's now deprecated, so never mind
3277
3278                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3279                         $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3280
3281                         $previewHTML = $parserOutput->getText();
3282                         $this->mParserOutput = $parserOutput;
3283                         $wgOut->addParserOutputNoText( $parserOutput );
3284
3285                         if ( count( $parserOutput->getWarnings() ) ) {
3286                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3287                         }
3288                 } catch ( MWContentSerializationException $ex ) {
3289                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3290                         $note .= "\n\n" . $m->parse();
3291                         $previewHTML = '';
3292                 }
3293
3294                 if ( $this->isConflict ) {
3295                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3296                 } else {
3297                         $conflict = '<hr />';
3298                 }
3299
3300                 $previewhead = "<div class='previewnote'>\n" .
3301                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3302                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3303
3304                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3305                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3306                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3307                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3308
3309                 wfProfileOut( __METHOD__ );
3310                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3311         }
3312
3313         /**
3314          * @return Array
3315          */
3316         function getTemplates() {
3317                 if ( $this->preview || $this->section != '' ) {
3318                         $templates = array();
3319                         if ( !isset( $this->mParserOutput ) ) {
3320                                 return $templates;
3321                         }
3322                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3323                                 foreach ( array_keys( $template ) as $dbk ) {
3324                                         $templates[] = Title::makeTitle( $ns, $dbk );
3325                                 }
3326                         }
3327                         return $templates;
3328                 } else {
3329                         return $this->mTitle->getTemplateLinksFrom();
3330                 }
3331         }
3332
3333         /**
3334          * Shows a bulletin board style toolbar for common editing functions.
3335          * It can be disabled in the user preferences.
3336          * The necessary JavaScript code can be found in skins/common/edit.js.
3337          *
3338          * @return string
3339          */
3340         static function getEditToolbar() {
3341                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3342                 global $wgEnableUploads, $wgForeignFileRepos;
3343
3344                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3345
3346                 /**
3347                  * $toolarray is an array of arrays each of which includes the
3348                  * filename of the button image (without path), the opening
3349                  * tag, the closing tag, optionally a sample text that is
3350                  * inserted between the two when no selection is highlighted
3351                  * and.  The tip text is shown when the user moves the mouse
3352                  * over the button.
3353                  *
3354                  * Also here: accesskeys (key), which are not used yet until
3355                  * someone can figure out a way to make them work in
3356                  * IE. However, we should make sure these keys are not defined
3357                  * on the edit page.
3358                  */
3359                 $toolarray = array(
3360                         array(
3361                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3362                                 'id'     => 'mw-editbutton-bold',
3363                                 'open'   => '\'\'\'',
3364                                 'close'  => '\'\'\'',
3365                                 'sample' => wfMessage( 'bold_sample' )->text(),
3366                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3367                                 'key'    => 'B'
3368                         ),
3369                         array(
3370                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3371                                 'id'     => 'mw-editbutton-italic',
3372                                 'open'   => '\'\'',
3373                                 'close'  => '\'\'',
3374                                 'sample' => wfMessage( 'italic_sample' )->text(),
3375                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3376                                 'key'    => 'I'
3377                         ),
3378                         array(
3379                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3380                                 'id'     => 'mw-editbutton-link',
3381                                 'open'   => '[[',
3382                                 'close'  => ']]',
3383                                 'sample' => wfMessage( 'link_sample' )->text(),
3384                                 'tip'    => wfMessage( 'link_tip' )->text(),
3385                                 'key'    => 'L'
3386                         ),
3387                         array(
3388                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3389                                 'id'     => 'mw-editbutton-extlink',
3390                                 'open'   => '[',
3391                                 'close'  => ']',
3392                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3393                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3394                                 'key'    => 'X'
3395                         ),
3396                         array(
3397                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3398                                 'id'     => 'mw-editbutton-headline',
3399                                 'open'   => "\n== ",
3400                                 'close'  => " ==\n",
3401                                 'sample' => wfMessage( 'headline_sample' )->text(),
3402                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3403                                 'key'    => 'H'
3404                         ),
3405                         $imagesAvailable ? array(
3406                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3407                                 'id'     => 'mw-editbutton-image',
3408                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3409                                 'close'  => ']]',
3410                                 'sample' => wfMessage( 'image_sample' )->text(),
3411                                 'tip'    => wfMessage( 'image_tip' )->text(),
3412                                 'key'    => 'D',
3413                         ) : false,
3414                         $imagesAvailable ? array(
3415                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3416                                 'id'     => 'mw-editbutton-media',
3417                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3418                                 'close'  => ']]',
3419                                 'sample' => wfMessage( 'media_sample' )->text(),
3420                                 'tip'    => wfMessage( 'media_tip' )->text(),
3421                                 'key'    => 'M'
3422                         ) : false,
3423                         class_exists( 'MathRenderer' ) ? array(
3424                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3425                                 'id'     => 'mw-editbutton-math',
3426                                 'open'   => "<math>",
3427                                 'close'  => "</math>",
3428                                 'sample' => wfMessage( 'math_sample' )->text(),
3429                                 'tip'    => wfMessage( 'math_tip' )->text(),
3430                                 'key'    => 'C'
3431                         ) : false,
3432                         array(
3433                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3434                                 'id'     => 'mw-editbutton-nowiki',
3435                                 'open'   => "<nowiki>",
3436                                 'close'  => "</nowiki>",
3437                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3438                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3439                                 'key'    => 'N'
3440                         ),
3441                         array(
3442                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3443                                 'id'     => 'mw-editbutton-signature',
3444                                 'open'   => '--~~~~',
3445                                 'close'  => '',
3446                                 'sample' => '',
3447                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3448                                 'key'    => 'Y'
3449                         ),
3450                         array(
3451                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3452                                 'id'     => 'mw-editbutton-hr',
3453                                 'open'   => "\n----\n",
3454                                 'close'  => '',
3455                                 'sample' => '',
3456                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3457                                 'key'    => 'R'
3458                         )
3459                 );
3460
3461                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3462                 foreach ( $toolarray as $tool ) {
3463                         if ( !$tool ) {
3464                                 continue;
3465                         }
3466
3467                         $params = array(
3468                                 $wgStylePath . '/common/images/' . $tool['image'],
3469                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3470                                 // Older browsers show a "speedtip" type message only for ALT.
3471                                 // Ideally these should be different, realistically they
3472                                 // probably don't need to be.
3473                                 $tool['tip'],
3474                                 $tool['open'],
3475                                 $tool['close'],
3476                                 $tool['sample'],
3477                                 $tool['id'],
3478                         );
3479
3480                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3481                 }
3482
3483                 // This used to be called on DOMReady from mediawiki.action.edit, which
3484                 // ended up causing race conditions with the setup code above.
3485                 $script .= "\n" .
3486                         "// Create button bar\n" .
3487                         "$(function() { mw.toolbar.init(); } );\n";
3488
3489                 $script .= '});';
3490                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3491
3492                 $toolbar = '<div id="toolbar"></div>';
3493
3494                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3495
3496                 return $toolbar;
3497         }
3498
3499         /**
3500          * Returns an array of html code of the following checkboxes:
3501          * minor and watch
3502          *
3503          * @param int $tabindex Current tabindex
3504          * @param array $checked of checkbox => bool, where bool indicates the checked
3505          *                 status of the checkbox
3506          *
3507          * @return array
3508          */
3509         public function getCheckboxes( &$tabindex, $checked ) {
3510                 global $wgUser;
3511
3512                 $checkboxes = array();
3513
3514                 // don't show the minor edit checkbox if it's a new page or section
3515                 if ( !$this->isNew ) {
3516                         $checkboxes['minor'] = '';
3517                         $minorLabel = wfMessage( 'minoredit' )->parse();
3518                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3519                                 $attribs = array(
3520                                         'tabindex' => ++$tabindex,
3521                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3522                                         'id' => 'wpMinoredit',
3523                                 );
3524                                 $checkboxes['minor'] =
3525                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3526                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3527                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3528                                         ">{$minorLabel}</label>";
3529                         }
3530                 }
3531
3532                 $watchLabel = wfMessage( 'watchthis' )->parse();
3533                 $checkboxes['watch'] = '';
3534                 if ( $wgUser->isLoggedIn() ) {
3535                         $attribs = array(
3536                                 'tabindex' => ++$tabindex,
3537                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3538                                 'id' => 'wpWatchthis',
3539                         );
3540                         $checkboxes['watch'] =
3541                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3542                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3543                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3544                                 ">{$watchLabel}</label>";
3545                 }
3546                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3547                 return $checkboxes;
3548         }
3549
3550         /**
3551          * Returns an array of html code of the following buttons:
3552          * save, diff, preview and live
3553          *
3554          * @param int $tabindex Current tabindex
3555          *
3556          * @return array
3557          */
3558         public function getEditButtons( &$tabindex ) {
3559                 $buttons = array();
3560
3561                 $temp = array(
3562                         'id' => 'wpSave',
3563                         'name' => 'wpSave',
3564                         'type' => 'submit',
3565                         'tabindex' => ++$tabindex,
3566                         'value' => wfMessage( 'savearticle' )->text(),
3567                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3568                         'title' => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3569                 );
3570                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3571
3572                 ++$tabindex; // use the same for preview and live preview
3573                 $temp = array(
3574                         'id' => 'wpPreview',
3575                         'name' => 'wpPreview',
3576                         'type' => 'submit',
3577                         'tabindex' => $tabindex,
3578                         'value' => wfMessage( 'showpreview' )->text(),
3579                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3580                         'title' => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3581                 );
3582                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3583                 $buttons['live'] = '';
3584
3585                 $temp = array(
3586                         'id' => 'wpDiff',
3587                         'name' => 'wpDiff',
3588                         'type' => 'submit',
3589                         'tabindex' => ++$tabindex,
3590                         'value' => wfMessage( 'showdiff' )->text(),
3591                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3592                         'title' => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3593                 );
3594                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3595
3596                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3597                 return $buttons;
3598         }
3599
3600         /**
3601          * Output preview text only. This can be sucked into the edit page
3602          * via JavaScript, and saves the server time rendering the skin as
3603          * well as theoretically being more robust on the client (doesn't
3604          * disturb the edit box's undo history, won't eat your text on
3605          * failure, etc).
3606          *
3607          * @todo This doesn't include category or interlanguage links.
3608          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3609          *       or something...</s>" that might also require more skin
3610          *       initialization, so check whether that's a problem.
3611          */
3612         function livePreview() {
3613                 global $wgOut;
3614                 $wgOut->disable();
3615                 header( 'Content-type: text/xml; charset=utf-8' );
3616                 header( 'Cache-control: no-cache' );
3617
3618                 $previewText = $this->getPreviewText();
3619                 #$categories = $skin->getCategoryLinks();
3620
3621                 $s =
3622                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3623                 Xml::tags( 'livepreview', null,
3624                         Xml::element( 'preview', null, $previewText )
3625                         #.      Xml::element( 'category', null, $categories )
3626                 );
3627                 echo $s;
3628         }
3629
3630         /**
3631          * Call the stock "user is blocked" page
3632          *
3633          * @deprecated in 1.19; throw an exception directly instead
3634          */
3635         function blockedPage() {
3636                 wfDeprecated( __METHOD__, '1.19' );
3637                 global $wgUser;
3638
3639                 throw new UserBlockedError( $wgUser->getBlock() );
3640         }
3641
3642         /**
3643          * Produce the stock "please login to edit pages" page
3644          *
3645          * @deprecated in 1.19; throw an exception directly instead
3646          */
3647         function userNotLoggedInPage() {
3648                 wfDeprecated( __METHOD__, '1.19' );
3649                 throw new PermissionsError( 'edit' );
3650         }
3651
3652         /**
3653          * Show an error page saying to the user that he has insufficient permissions
3654          * to create a new page
3655          *
3656          * @deprecated in 1.19; throw an exception directly instead
3657          */
3658         function noCreatePermission() {
3659                 wfDeprecated( __METHOD__, '1.19' );
3660                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3661                 throw new PermissionsError( $permission );
3662         }
3663
3664         /**
3665          * Creates a basic error page which informs the user that
3666          * they have attempted to edit a nonexistent section.
3667          */
3668         function noSuchSectionPage() {
3669                 global $wgOut;
3670
3671                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3672
3673                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3674                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3675                 $wgOut->addHTML( $res );
3676
3677                 $wgOut->returnToMain( false, $this->mTitle );
3678         }
3679
3680         /**
3681          * Show "your edit contains spam" page with your diff and text
3682          *
3683          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3684          */
3685         public function spamPageWithContent( $match = false ) {
3686                 global $wgOut, $wgLang;
3687                 $this->textbox2 = $this->textbox1;
3688
3689                 if ( is_array( $match ) ) {
3690                         $match = $wgLang->listToText( $match );
3691                 }
3692                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3693
3694                 $wgOut->addHTML( '<div id="spamprotected">' );
3695                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3696                 if ( $match ) {
3697                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3698                 }
3699                 $wgOut->addHTML( '</div>' );
3700
3701                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3702                 $this->showDiff();
3703
3704                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3705                 $this->showTextbox2();
3706
3707                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3708         }
3709
3710         /**
3711          * Format an anchor fragment as it would appear for a given section name
3712          * @param $text String
3713          * @return String
3714          * @private
3715          */
3716         function sectionAnchor( $text ) {
3717                 global $wgParser;
3718                 return $wgParser->guessSectionNameFromWikiText( $text );
3719         }
3720
3721         /**
3722          * Check if the browser is on a blacklist of user-agents known to
3723          * mangle UTF-8 data on form submission. Returns true if Unicode
3724          * should make it through, false if it's known to be a problem.
3725          * @return bool
3726          * @private
3727          */
3728         function checkUnicodeCompliantBrowser() {
3729                 global $wgBrowserBlackList, $wgRequest;
3730
3731                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3732                 if ( $currentbrowser === false ) {
3733                         // No User-Agent header sent? Trust it by default...
3734                         return true;
3735                 }
3736
3737                 foreach ( $wgBrowserBlackList as $browser ) {
3738                         if ( preg_match( $browser, $currentbrowser ) ) {
3739                                 return false;
3740                         }
3741                 }
3742                 return true;
3743         }
3744
3745         /**
3746          * Filter an input field through a Unicode de-armoring process if it
3747          * came from an old browser with known broken Unicode editing issues.
3748          *
3749          * @param $request WebRequest
3750          * @param $field String
3751          * @return String
3752          * @private
3753          */
3754         function safeUnicodeInput( $request, $field ) {
3755                 $text = rtrim( $request->getText( $field ) );
3756                 return $request->getBool( 'safemode' )
3757                         ? $this->unmakesafe( $text )
3758                         : $text;
3759         }
3760
3761         /**
3762          * @param $request WebRequest
3763          * @param $text string
3764          * @return string
3765          */
3766         function safeUnicodeText( $request, $text ) {
3767                 $text = rtrim( $text );
3768                 return $request->getBool( 'safemode' )
3769                         ? $this->unmakesafe( $text )
3770                         : $text;
3771         }
3772
3773         /**
3774          * Filter an output field through a Unicode armoring process if it is
3775          * going to an old browser with known broken Unicode editing issues.
3776          *
3777          * @param $text String
3778          * @return String
3779          * @private
3780          */
3781         function safeUnicodeOutput( $text ) {
3782                 global $wgContLang;
3783                 $codedText = $wgContLang->recodeForEdit( $text );
3784                 return $this->checkUnicodeCompliantBrowser()
3785                         ? $codedText
3786                         : $this->makesafe( $codedText );
3787         }
3788
3789         /**
3790          * A number of web browsers are known to corrupt non-ASCII characters
3791          * in a UTF-8 text editing environment. To protect against this,
3792          * detected browsers will be served an armored version of the text,
3793          * with non-ASCII chars converted to numeric HTML character references.
3794          *
3795          * Preexisting such character references will have a 0 added to them
3796          * to ensure that round-trips do not alter the original data.
3797          *
3798          * @param $invalue String
3799          * @return String
3800          * @private
3801          */
3802         function makesafe( $invalue ) {
3803                 // Armor existing references for reversibility.
3804                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3805
3806                 $bytesleft = 0;
3807                 $result = "";
3808                 $working = 0;
3809                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3810                         $bytevalue = ord( $invalue[$i] );
3811                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3812                                 $result .= chr( $bytevalue );
3813                                 $bytesleft = 0;
3814                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3815                                 $working = $working << 6;
3816                                 $working += ( $bytevalue & 0x3F );
3817                                 $bytesleft--;
3818                                 if ( $bytesleft <= 0 ) {
3819                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3820                                 }
3821                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3822                                 $working = $bytevalue & 0x1F;
3823                                 $bytesleft = 1;
3824                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3825                                 $working = $bytevalue & 0x0F;
3826                                 $bytesleft = 2;
3827                         } else { // 1111 0xxx
3828                                 $working = $bytevalue & 0x07;
3829                                 $bytesleft = 3;
3830                         }
3831                 }
3832                 return $result;
3833         }
3834
3835         /**
3836          * Reverse the previously applied transliteration of non-ASCII characters
3837          * back to UTF-8. Used to protect data from corruption by broken web browsers
3838          * as listed in $wgBrowserBlackList.
3839          *
3840          * @param $invalue String
3841          * @return String
3842          * @private
3843          */
3844         function unmakesafe( $invalue ) {
3845                 $result = "";
3846                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3847                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3848                                 $i += 3;
3849                                 $hexstring = "";
3850                                 do {
3851                                         $hexstring .= $invalue[$i];
3852                                         $i++;
3853                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3854
3855                                 // Do some sanity checks. These aren't needed for reversibility,
3856                                 // but should help keep the breakage down if the editor
3857                                 // breaks one of the entities whilst editing.
3858                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3859                                         $codepoint = hexdec( $hexstring );
3860                                         $result .= codepointToUtf8( $codepoint );
3861                                 } else {
3862                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3863                                 }
3864                         } else {
3865                                 $result .= substr( $invalue, $i, 1 );
3866                         }
3867                 }
3868                 // reverse the transform that we made for reversibility reasons.
3869                 return strtr( $result, array( "&#x0" => "&#x" ) );
3870         }
3871 }