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          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: User cannot edit? (not used)
  71          */
  72         const AS_USER_CANNOT_EDIT = 217;
  73
  74         /**
  75          * Status: this anonymous user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_ANON = 218;
  78
  79         /**
  80          * Status: this logged in user is not allowed to edit this page
  81          */
  82         const AS_READ_ONLY_PAGE_LOGGED = 219;
  83
  84         /**
  85          * Status: wiki is in readonly mode (wfReadOnly() == true)
  86          */
  87         const AS_READ_ONLY_PAGE = 220;
  88
  89         /**
  90          * Status: rate limiter for action 'edit' was tripped
  91          */
  92         const AS_RATE_LIMITED = 221;
  93
  94         /**
  95          * Status: article was deleted while editing and param wpRecreate == false or form
  96          * was not posted
  97          */
  98         const AS_ARTICLE_WAS_DELETED = 222;
  99
 100         /**
 101          * Status: user tried to create this page, but is not allowed to do that
 102          * ( Title->userCan('create') == false )
 103          */
 104         const AS_NO_CREATE_PERMISSION = 223;
 105
 106         /**
 107          * Status: user tried to create a blank page
 108          */
 109         const AS_BLANK_ARTICLE = 224;
 110
 111         /**
 112          * Status: (non-resolvable) edit conflict
 113          */
 114         const AS_CONFLICT_DETECTED = 225;
 115
 116         /**
 117          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 118          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 119          */
 120         const AS_SUMMARY_NEEDED = 226;
 121
 122         /**
 123          * Status: user tried to create a new section without content
 124          */
 125         const AS_TEXTBOX_EMPTY = 228;
 126
 127         /**
 128          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 129          */
 130         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 131
 132         /**
 133          * not used
 134          */
 135         const AS_OK = 230;
 136
 137         /**
 138          * Status: WikiPage::doEdit() was unsuccessful
 139          */
 140         const AS_END = 231;
 141
 142         /**
 143          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 144          */
 145         const AS_SPAM_ERROR = 232;
 146
 147         /**
 148          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 149          */
 150         const AS_IMAGE_REDIRECT_ANON = 233;
 151
 152         /**
 153          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 154          */
 155         const AS_IMAGE_REDIRECT_LOGGED = 234;
 156
 157         /**
 158          * Status: can't parse content
 159          */
 160         const AS_PARSE_ERROR = 240;
 161
 162         /**
 163          * HTML id and name for the beginning of the edit form.
 164          */
 165         const EDITFORM_ID = 'editform';
 166
 167         /**
 168          * Prefix of key for cookie used to pass post-edit state.
 169          * The revision id edited is added after this
 170          */
 171         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 172
 173         /**
 174          * Duration of PostEdit cookie, in seconds.
 175          * The cookie will be removed instantly if the JavaScript runs.
 176          *
 177          * Otherwise, though, we don't want the cookies to accumulate.
 178          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible limit of only 20 cookies per domain.
 179          * This still applies at least to some versions of IE without full updates:
 180          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 181          *
 182          * A value of 20 minutes should be enough to take into account slow loads and minor
 183          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 184          */
 185         const POST_EDIT_COOKIE_DURATION = 1200;
 186
 187         /**
 188          * @var Article
 189          */
 190         var $mArticle;
 191
 192         /**
 193          * @var Title
 194          */
 195         var $mTitle;
 196         private $mContextTitle = null;
 197         var $action = 'submit';
 198         var $isConflict = false;
 199         var $isCssJsSubpage = false;
 200         var $isCssSubpage = false;
 201         var $isJsSubpage = false;
 202         var $isWrongCaseCssJsPage = false;
 203         var $isNew = false; // new page or new section
 204         var $deletedSinceEdit;
 205         var $formtype;
 206         var $firsttime;
 207         var $lastDelete;
 208         var $mTokenOk = false;
 209         var $mTokenOkExceptSuffix = false;
 210         var $mTriedSave = false;
 211         var $incompleteForm = false;
 212         var $tooBig = false;
 213         var $kblength = false;
 214         var $missingComment = false;
 215         var $missingSummary = false;
 216         var $allowBlankSummary = false;
 217         var $autoSumm = '';
 218         var $hookError = '';
 219         #var $mPreviewTemplates;
 220
 221         /**
 222          * @var ParserOutput
 223          */
 224         var $mParserOutput;
 225
 226         /**
 227          * Has a summary been preset using GET parameter &summary= ?
 228          * @var bool
 229          */
 230         var $hasPresetSummary = false;
 231
 232         var $mBaseRevision = false;
 233         var $mShowSummaryField = true;
 234
 235         # Form values
 236         var $save = false, $preview = false, $diff = false;
 237         var $minoredit = false, $watchthis = false, $recreate = false;
 238         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 239         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 240         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 241         var $contentModel = null, $contentFormat = null;
 242
 243         # Placeholders for text injection by hooks (must be HTML)
 244         # extensions should take care to _append_ to the present value
 245         public $editFormPageTop = ''; // Before even the preview
 246         public $editFormTextTop = '';
 247         public $editFormTextBeforeContent = '';
 248         public $editFormTextAfterWarn = '';
 249         public $editFormTextAfterTools = '';
 250         public $editFormTextBottom = '';
 251         public $editFormTextAfterContent = '';
 252         public $previewTextAfterContent = '';
 253         public $mPreloadContent = null;
 254
 255         /* $didSave should be set to true whenever an article was successfully altered. */
 256         public $didSave = false;
 257         public $undidRev = 0;
 258
 259         public $suppressIntro = false;
 260
 261         /**
 262          * Set to true to allow editing of non-text content types.
 263          *
 264          * @var bool
 265          */
 266         public $allowNonTextContent = false;
 267
 268         /**
 269          * @param Article $article
 270          */
 271         public function __construct( Article $article ) {
 272                 $this->mArticle = $article;
 273                 $this->mTitle = $article->getTitle();
 274
 275                 $this->contentModel = $this->mTitle->getContentModel();
 276
 277                 $handler = ContentHandler::getForModelID( $this->contentModel );
 278                 $this->contentFormat = $handler->getDefaultFormat();
 279         }
 280
 281         /**
 282          * @return Article
 283          */
 284         public function getArticle() {
 285                 return $this->mArticle;
 286         }
 287
 288         /**
 289          * @since 1.19
 290          * @return Title
 291          */
 292         public function getTitle() {
 293                 return $this->mTitle;
 294         }
 295
 296         /**
 297          * Set the context Title object
 298          *
 299          * @param Title|null $title Title object or null
 300          */
 301         public function setContextTitle( $title ) {
 302                 $this->mContextTitle = $title;
 303         }
 304
 305         /**
 306          * Get the context title object.
 307          * If not set, $wgTitle will be returned. This behavior might change in
 308          * the future to return $this->mTitle instead.
 309          *
 310          * @return Title
 311          */
 312         public function getContextTitle() {
 313                 if ( is_null( $this->mContextTitle ) ) {
 314                         global $wgTitle;
 315                         return $wgTitle;
 316                 } else {
 317                         return $this->mContextTitle;
 318                 }
 319         }
 320
 321         /**
 322          * Returns if the given content model is editable.
 323          *
 324          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 325          * @return bool
 326          * @throws MWException if $modelId has no known handler
 327          */
 328         public function isSupportedContentModel( $modelId ) {
 329                 return $this->allowNonTextContent ||
 330                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 331         }
 332
 333         function submit() {
 334                 $this->edit();
 335         }
 336
 337         /**
 338          * This is the function that gets called for "action=edit". It
 339          * sets up various member variables, then passes execution to
 340          * another function, usually showEditForm()
 341          *
 342          * The edit form is self-submitting, so that when things like
 343          * preview and edit conflicts occur, we get the same form back
 344          * with the extra stuff added.  Only when the final submission
 345          * is made and all is well do we actually save and redirect to
 346          * the newly-edited page.
 347          */
 348         function edit() {
 349                 global $wgOut, $wgRequest, $wgUser;
 350                 // Allow extensions to modify/prevent this form or submission
 351                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 352                         return;
 353                 }
 354
 355                 wfProfileIn( __METHOD__ );
 356                 wfDebug( __METHOD__ . ": enter\n" );
 357
 358                 // If they used redlink=1 and the page exists, redirect to the main article
 359                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 360                         $wgOut->redirect( $this->mTitle->getFullURL() );
 361                         wfProfileOut( __METHOD__ );
 362                         return;
 363                 }
 364
 365                 $this->importFormData( $wgRequest );
 366                 $this->firsttime = false;
 367
 368                 if ( $this->live ) {
 369                         $this->livePreview();
 370                         wfProfileOut( __METHOD__ );
 371                         return;
 372                 }
 373
 374                 if ( wfReadOnly() && $this->save ) {
 375                         // Force preview
 376                         $this->save = false;
 377                         $this->preview = true;
 378                 }
 379
 380                 if ( $this->save ) {
 381                         $this->formtype = 'save';
 382                 } elseif ( $this->preview ) {
 383                         $this->formtype = 'preview';
 384                 } elseif ( $this->diff ) {
 385                         $this->formtype = 'diff';
 386                 } else { # First time through
 387                         $this->firsttime = true;
 388                         if ( $this->previewOnOpen() ) {
 389                                 $this->formtype = 'preview';
 390                         } else {
 391                                 $this->formtype = 'initial';
 392                         }
 393                 }
 394
 395                 $permErrors = $this->getEditPermissionErrors();
 396                 if ( $permErrors ) {
 397                         wfDebug( __METHOD__ . ": User can't edit\n" );
 398                         // Auto-block user's IP if the account was "hard" blocked
 399                         $wgUser->spreadAnyEditBlock();
 400
 401                         $this->displayPermissionsError( $permErrors );
 402
 403                         wfProfileOut( __METHOD__ );
 404                         return;
 405                 }
 406
 407                 wfProfileIn( __METHOD__ . "-business-end" );
 408
 409                 $this->isConflict = false;
 410                 // css / js subpages of user pages get a special treatment
 411                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 412                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 413                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 414                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 415
 416                 # Show applicable editing introductions
 417                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 418                         $this->showIntro();
 419                 }
 420
 421                 # Attempt submission here.  This will check for edit conflicts,
 422                 # and redundantly check for locked database, blocked IPs, etc.
 423                 # that edit() already checked just in case someone tries to sneak
 424                 # in the back door with a hand-edited submission URL.
 425
 426                 if ( 'save' == $this->formtype ) {
 427                         if ( !$this->attemptSave() ) {
 428                                 wfProfileOut( __METHOD__ . "-business-end" );
 429                                 wfProfileOut( __METHOD__ );
 430                                 return;
 431                         }
 432                 }
 433
 434                 # First time through: get contents, set time for conflict
 435                 # checking, etc.
 436                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 437                         if ( $this->initialiseForm() === false ) {
 438                                 $this->noSuchSectionPage();
 439                                 wfProfileOut( __METHOD__ . "-business-end" );
 440                                 wfProfileOut( __METHOD__ );
 441                                 return;
 442                         }
 443
 444                         if ( !$this->mTitle->getArticleID() ) {
 445                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 446                         } else {
 447                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 448                         }
 449
 450                 }
 451
 452                 $this->showEditForm();
 453                 wfProfileOut( __METHOD__ . "-business-end" );
 454                 wfProfileOut( __METHOD__ );
 455         }
 456
 457         /**
 458          * @return array
 459          */
 460         protected function getEditPermissionErrors() {
 461                 global $wgUser;
 462                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 463                 # Can this title be created?
 464                 if ( !$this->mTitle->exists() ) {
 465                         $permErrors = array_merge( $permErrors,
 466                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 467                 }
 468                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 469                 $remove = array();
 470                 foreach ( $permErrors as $error ) {
 471                         if ( ( $this->preview || $this->diff )
 472                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 473                         ) {
 474                                 $remove[] = $error;
 475                         }
 476                 }
 477                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 478                 return $permErrors;
 479         }
 480
 481         /**
 482          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 483          * but with the following differences:
 484          * - If redlink=1, the user will be redirected to the page
 485          * - If there is content to display or the error occurs while either saving,
 486          *   previewing or showing the difference, it will be a
 487          *   "View source for ..." page displaying the source code after the error message.
 488          *
 489          * @since 1.19
 490          * @param array $permErrors Array of permissions errors, as returned by
 491          *    Title::getUserPermissionsErrors().
 492          * @throws PermissionsError
 493          */
 494         protected function displayPermissionsError( array $permErrors ) {
 495                 global $wgRequest, $wgOut;
 496
 497                 if ( $wgRequest->getBool( 'redlink' ) ) {
 498                         // The edit page was reached via a red link.
 499                         // Redirect to the article page and let them click the edit tab if
 500                         // they really want a permission error.
 501                         $wgOut->redirect( $this->mTitle->getFullURL() );
 502                         return;
 503                 }
 504
 505                 $content = $this->getContentObject();
 506
 507                 # Use the normal message if there's nothing to display
 508                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 509                         $action = $this->mTitle->exists() ? 'edit' :
 510                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 511                         throw new PermissionsError( $action, $permErrors );
 512                 }
 513
 514                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 515
 516                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 517                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 518                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 519                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 520                 $wgOut->addHTML( "<hr />\n" );
 521
 522                 # If the user made changes, preserve them when showing the markup
 523                 # (This happens when a user is blocked during edit, for instance)
 524                 if ( !$this->firsttime ) {
 525                         $text = $this->textbox1;
 526                         $wgOut->addWikiMsg( 'viewyourtext' );
 527                 } else {
 528                         $text = $this->toEditText( $content );
 529                         $wgOut->addWikiMsg( 'viewsourcetext' );
 530                 }
 531
 532                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 533
 534                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 535                         Linker::formatTemplates( $this->getTemplates() ) ) );
 536
 537                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 538
 539                 if ( $this->mTitle->exists() ) {
 540                         $wgOut->returnToMain( null, $this->mTitle );
 541                 }
 542         }
 543
 544         /**
 545          * Show a read-only error
 546          * Parameters are the same as OutputPage:readOnlyPage()
 547          * Redirect to the article page if redlink=1
 548          * @deprecated since 1.19; use displayPermissionsError() instead
 549          */
 550         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 551                 wfDeprecated( __METHOD__, '1.19' );
 552
 553                 global $wgRequest, $wgOut;
 554                 if ( $wgRequest->getBool( 'redlink' ) ) {
 555                         // The edit page was reached via a red link.
 556                         // Redirect to the article page and let them click the edit tab if
 557                         // they really want a permission error.
 558                         $wgOut->redirect( $this->mTitle->getFullURL() );
 559                 } else {
 560                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 561                 }
 562         }
 563
 564         /**
 565          * Should we show a preview when the edit form is first shown?
 566          *
 567          * @return bool
 568          */
 569         protected function previewOnOpen() {
 570                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 571                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 572                         // Explicit override from request
 573                         return true;
 574                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 575                         // Explicit override from request
 576                         return false;
 577                 } elseif ( $this->section == 'new' ) {
 578                         // Nothing *to* preview for new sections
 579                         return false;
 580                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 581                         // Standard preference behavior
 582                         return true;
 583                 } elseif ( !$this->mTitle->exists()
 584                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 585                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 586                 ) {
 587                         // Categories are special
 588                         return true;
 589                 } else {
 590                         return false;
 591                 }
 592         }
 593
 594         /**
 595          * Checks whether the user entered a skin name in uppercase,
 596          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 597          *
 598          * @return bool
 599          */
 600         protected function isWrongCaseCssJsPage() {
 601                 if ( $this->mTitle->isCssJsSubpage() ) {
 602                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 603                         $skins = array_merge(
 604                                 array_keys( Skin::getSkinNames() ),
 605                                 array( 'common' )
 606                         );
 607                         return !in_array( $name, $skins )
 608                                 && in_array( strtolower( $name ), $skins );
 609                 } else {
 610                         return false;
 611                 }
 612         }
 613
 614         /**
 615          * Returns whether section editing is supported for the current page.
 616          * Subclasses may override this to replace the default behavior, which is
 617          * to check ContentHandler::supportsSections.
 618          *
 619          * @return bool true if this edit page supports sections, false otherwise.
 620          */
 621         protected function isSectionEditSupported() {
 622                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 623                 return $contentHandler->supportsSections();
 624         }
 625
 626         /**
 627          * This function collects the form data and uses it to populate various member variables.
 628          * @param WebRequest $request
 629          * @throws ErrorPageError
 630          */
 631         function importFormData( &$request ) {
 632                 global $wgContLang, $wgUser;
 633
 634                 wfProfileIn( __METHOD__ );
 635
 636                 # Section edit can come from either the form or a link
 637                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 638
 639                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 640                         wfProfileOut( __METHOD__ );
 641                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 642                 }
 643
 644                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 645
 646                 if ( $request->wasPosted() ) {
 647                         # These fields need to be checked for encoding.
 648                         # Also remove trailing whitespace, but don't remove _initial_
 649                         # whitespace from the text boxes. This may be significant formatting.
 650                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 651                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 652                                 // Skip this if wpTextbox2 has input, it indicates that we came
 653                                 // from a conflict page with raw page text, not a custom form
 654                                 // modified by subclasses
 655                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 656                                 $textbox1 = $this->importContentFormData( $request );
 657                                 if ( $textbox1 !== null ) {
 658                                         $this->textbox1 = $textbox1;
 659                                 }
 660
 661                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 662                         }
 663
 664                         # Truncate for whole multibyte characters
 665                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 666
 667                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 668                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 669                         # section titles.
 670                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 671
 672                         # Treat sectiontitle the same way as summary.
 673                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 674                         # currently doing double duty as both edit summary and section title. Right now this
 675                         # is just to allow API edits to work around this limitation, but this should be
 676                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 677                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 678                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 679
 680                         $this->edittime = $request->getVal( 'wpEdittime' );
 681                         $this->starttime = $request->getVal( 'wpStarttime' );
 682
 683                         $undidRev = $request->getInt( 'wpUndidRevision' );
 684                         if ( $undidRev ) {
 685                                 $this->undidRev = $undidRev;
 686                         }
 687
 688                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 689
 690                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 691                                 // wpTextbox1 field is missing, possibly due to being "too big"
 692                                 // according to some filter rules such as Suhosin's setting for
 693                                 // suhosin.request.max_value_length (d'oh)
 694                                 $this->incompleteForm = true;
 695                         } else {
 696                                 // edittime should be one of our last fields; if it's missing,
 697                                 // the submission probably broke somewhere in the middle.
 698                                 $this->incompleteForm = is_null( $this->edittime );
 699                         }
 700                         if ( $this->incompleteForm ) {
 701                                 # If the form is incomplete, force to preview.
 702                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 703                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 704                                 $this->preview = true;
 705                         } else {
 706                                 /* Fallback for live preview */
 707                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 708                                 $this->diff = $request->getCheck( 'wpDiff' );
 709
 710                                 // Remember whether a save was requested, so we can indicate
 711                                 // if we forced preview due to session failure.
 712                                 $this->mTriedSave = !$this->preview;
 713
 714                                 if ( $this->tokenOk( $request ) ) {
 715                                         # Some browsers will not report any submit button
 716                                         # if the user hits enter in the comment box.
 717                                         # The unmarked state will be assumed to be a save,
 718                                         # if the form seems otherwise complete.
 719                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 720                                 } elseif ( $this->diff ) {
 721                                         # Failed token check, but only requested "Show Changes".
 722                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 723                                 } else {
 724                                         # Page might be a hack attempt posted from
 725                                         # an external site. Preview instead of saving.
 726                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 727                                         $this->preview = true;
 728                                 }
 729                         }
 730                         $this->save = !$this->preview && !$this->diff;
 731                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 732                                 $this->edittime = null;
 733                         }
 734
 735                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 736                                 $this->starttime = null;
 737                         }
 738
 739                         $this->recreate = $request->getCheck( 'wpRecreate' );
 740
 741                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 742                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 743
 744                         # Don't force edit summaries when a user is editing their own user or talk page
 745                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 746                                 && $this->mTitle->getText() == $wgUser->getName()
 747                         ) {
 748                                 $this->allowBlankSummary = true;
 749                         } else {
 750                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 751                         }
 752
 753                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 754                 } else {
 755                         # Not a posted form? Start with nothing.
 756                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 757                         $this->textbox1 = '';
 758                         $this->summary = '';
 759                         $this->sectiontitle = '';
 760                         $this->edittime = '';
 761                         $this->starttime = wfTimestampNow();
 762                         $this->edit = false;
 763                         $this->preview = false;
 764                         $this->save = false;
 765                         $this->diff = false;
 766                         $this->minoredit = false;
 767                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overridden by request parameters
 768                         $this->recreate = false;
 769
 770                         // When creating a new section, we can preload a section title by passing it as the
 771                         // preloadtitle parameter in the URL (Bug 13100)
 772                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 773                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 774                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 775                                 $this->summary = $request->getVal( 'preloadtitle' );
 776                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 777                                 $this->summary = $request->getText( 'summary' );
 778                                 if ( $this->summary !== '' ) {
 779                                         $this->hasPresetSummary = true;
 780                                 }
 781                         }
 782
 783                         if ( $request->getVal( 'minor' ) ) {
 784                                 $this->minoredit = true;
 785                         }
 786                 }
 787
 788                 $this->oldid = $request->getInt( 'oldid' );
 789
 790                 $this->bot = $request->getBool( 'bot', true );
 791                 $this->nosummary = $request->getBool( 'nosummary' );
 792
 793                 $this->contentModel = $request->getText( 'model', $this->contentModel ); #may be overridden by revision
 794                 $this->contentFormat = $request->getText( 'format', $this->contentFormat ); #may be overridden by revision
 795
 796                 if ( !ContentHandler::getForModelID( $this->contentModel )->isSupportedFormat( $this->contentFormat ) ) {
 797                         throw new ErrorPageError(
 798                                 'editpage-notsupportedcontentformat-title',
 799                                 'editpage-notsupportedcontentformat-text',
 800                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 801                         );
 802                 }
 803                 #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
 804
 805                 $this->live = $request->getCheck( 'live' );
 806                 $this->editintro = $request->getText( 'editintro',
 807                         // Custom edit intro for new sections
 808                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 809
 810                 // Allow extensions to modify form data
 811                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 812
 813                 wfProfileOut( __METHOD__ );
 814         }
 815
 816         /**
 817          * Subpage overridable method for extracting the page content data from the
 818          * posted form to be placed in $this->textbox1, if using customized input
 819          * this method should be overridden and return the page text that will be used
 820          * for saving, preview parsing and so on...
 821          *
 822          * @param WebRequest $request
 823          */
 824         protected function importContentFormData( &$request ) {
 825                 return; // Don't do anything, EditPage already extracted wpTextbox1
 826         }
 827
 828         /**
 829          * Initialise form fields in the object
 830          * Called on the first invocation, e.g. when a user clicks an edit link
 831          * @return bool If the requested section is valid
 832          */
 833         function initialiseForm() {
 834                 global $wgUser;
 835                 $this->edittime = $this->mArticle->getTimestamp();
 836
 837                 $content = $this->getContentObject( false ); #TODO: track content object?!
 838                 if ( $content === false ) {
 839                         return false;
 840                 }
 841                 $this->textbox1 = $this->toEditText( $content );
 842
 843                 // activate checkboxes if user wants them to be always active
 844                 # Sort out the "watch" checkbox
 845                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 846                         # Watch all edits
 847                         $this->watchthis = true;
 848                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 849                         # Watch creations
 850                         $this->watchthis = true;
 851                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 852                         # Already watched
 853                         $this->watchthis = true;
 854                 }
 855                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 856                         $this->minoredit = true;
 857                 }
 858                 if ( $this->textbox1 === false ) {
 859                         return false;
 860                 }
 861                 return true;
 862         }
 863
 864         /**
 865          * Fetch initial editing page content.
 866          *
 867          * @param string|bool $def_text
 868          * @return string|bool string on success, $def_text for invalid sections
 869          * @private
 870          * @deprecated since 1.21, get WikiPage::getContent() instead.
 871          */
 872         function getContent( $def_text = false ) {
 873                 ContentHandler::deprecated( __METHOD__, '1.21' );
 874
 875                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 876                         $def_content = $this->toEditContent( $def_text );
 877                 } else {
 878                         $def_content = false;
 879                 }
 880
 881                 $content = $this->getContentObject( $def_content );
 882
 883                 // Note: EditPage should only be used with text based content anyway.
 884                 return $this->toEditText( $content );
 885         }
 886
 887         /**
 888          * @param Content|null $def_content The default value to return
 889          *
 890          * @return Content|null Content on success, $def_content for invalid sections
 891          *
 892          * @since 1.21
 893          */
 894         protected function getContentObject( $def_content = null ) {
 895                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 896
 897                 wfProfileIn( __METHOD__ );
 898
 899                 $content = false;
 900
 901                 // For message page not locally set, use the i18n message.
 902                 // For other non-existent articles, use preload text if any.
 903                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 904                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 905                                 # If this is a system message, get the default text.
 906                                 $msg = $this->mTitle->getDefaultMessageText();
 907
 908                                 $content = $this->toEditContent( $msg );
 909                         }
 910                         if ( $content === false ) {
 911                                 # If requested, preload some text.
 912                                 $preload = $wgRequest->getVal( 'preload',
 913                                         // Custom preload text for new sections
 914                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 915                                 $params = $wgRequest->getArray( 'preloadparams', array() );
 916
 917                                 $content = $this->getPreloadedContent( $preload, $params );
 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( $wgUser );
 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( $wgUser );
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          * @param User $user The user to get the revision for
1027          * @return Content|null
1028          */
1029         private function getOriginalContent( User $user ) {
1030                 if ( $this->section == 'new' ) {
1031                         return $this->getCurrentContent();
1032                 }
1033                 $revision = $this->mArticle->getRevisionFetched();
1034                 if ( $revision === null ) {
1035                         if ( !$this->contentModel ) {
1036                                 $this->contentModel = $this->getTitle()->getContentModel();
1037                         }
1038                         $handler = ContentHandler::getForModelID( $this->contentModel );
1039
1040                         return $handler->makeEmptyContent();
1041                 }
1042                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1043                 return $content;
1044         }
1045
1046         /**
1047          * Get the current content of the page. This is basically similar to
1048          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1049          * content object is returned instead of null.
1050          *
1051          * @since 1.21
1052          * @return Content
1053          */
1054         protected function getCurrentContent() {
1055                 $rev = $this->mArticle->getRevision();
1056                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1057
1058                 if ( $content === false || $content === null ) {
1059                         if ( !$this->contentModel ) {
1060                                 $this->contentModel = $this->getTitle()->getContentModel();
1061                         }
1062                         $handler = ContentHandler::getForModelID( $this->contentModel );
1063
1064                         return $handler->makeEmptyContent();
1065                 } else {
1066                         # nasty side-effect, but needed for consistency
1067                         $this->contentModel = $rev->getContentModel();
1068                         $this->contentFormat = $rev->getContentFormat();
1069
1070                         return $content;
1071                 }
1072         }
1073
1074         /**
1075          * Use this method before edit() to preload some text into the edit box
1076          *
1077          * @param string $text
1078          * @deprecated since 1.21, use setPreloadedContent() instead.
1079          */
1080         public function setPreloadedText( $text ) {
1081                 ContentHandler::deprecated( __METHOD__, "1.21" );
1082
1083                 $content = $this->toEditContent( $text );
1084
1085                 $this->setPreloadedContent( $content );
1086         }
1087
1088         /**
1089          * Use this method before edit() to preload some content into the edit box
1090          *
1091          * @param Content $content
1092          *
1093          * @since 1.21
1094          */
1095         public function setPreloadedContent( Content $content ) {
1096                 $this->mPreloadContent = $content;
1097         }
1098
1099         /**
1100          * Get the contents to be preloaded into the box, either set by
1101          * an earlier setPreloadText() or by loading the given page.
1102          *
1103          * @param string $preload representing the title to preload from.
1104          *
1105          * @return string
1106          *
1107          * @deprecated since 1.21, use getPreloadedContent() instead
1108          */
1109         protected function getPreloadedText( $preload ) {
1110                 ContentHandler::deprecated( __METHOD__, "1.21" );
1111
1112                 $content = $this->getPreloadedContent( $preload );
1113                 $text = $this->toEditText( $content );
1114
1115                 return $text;
1116         }
1117
1118         /**
1119          * Get the contents to be preloaded into the box, either set by
1120          * an earlier setPreloadText() or by loading the given page.
1121          *
1122          * @param string $preload Representing the title to preload from.
1123          * @param array $params Parameters to use (interface-message style) in the preloaded text
1124          *
1125          * @return Content
1126          *
1127          * @since 1.21
1128          */
1129         protected function getPreloadedContent( $preload, $params = array() ) {
1130                 global $wgUser;
1131
1132                 if ( !empty( $this->mPreloadContent ) ) {
1133                         return $this->mPreloadContent;
1134                 }
1135
1136                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1137
1138                 if ( $preload === '' ) {
1139                         return $handler->makeEmptyContent();
1140                 }
1141
1142                 $title = Title::newFromText( $preload );
1143                 # Check for existence to avoid getting MediaWiki:Noarticletext
1144                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1145                         //TODO: somehow show a warning to the user!
1146                         return $handler->makeEmptyContent();
1147                 }
1148
1149                 $page = WikiPage::factory( $title );
1150                 if ( $page->isRedirect() ) {
1151                         $title = $page->getRedirectTarget();
1152                         # Same as before
1153                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1154                                 //TODO: somehow show a warning to the user!
1155                                 return $handler->makeEmptyContent();
1156                         }
1157                         $page = WikiPage::factory( $title );
1158                 }
1159
1160                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1161                 $content = $page->getContent( Revision::RAW );
1162
1163                 if ( !$content ) {
1164                         //TODO: somehow show a warning to the user!
1165                         return $handler->makeEmptyContent();
1166                 }
1167
1168                 if ( $content->getModel() !== $handler->getModelID() ) {
1169                         $converted = $content->convert( $handler->getModelID() );
1170
1171                         if ( !$converted ) {
1172                                 //TODO: somehow show a warning to the user!
1173                                 wfDebug( "Attempt to preload incompatible content: "
1174                                                 . "can't convert " . $content->getModel()
1175                                                 . " to " . $handler->getModelID() );
1176
1177                                 return $handler->makeEmptyContent();
1178                         }
1179
1180                         $content = $converted;
1181                 }
1182
1183                 return $content->preloadTransform( $title, $parserOptions, $params );
1184         }
1185
1186         /**
1187          * Make sure the form isn't faking a user's credentials.
1188          *
1189          * @param WebRequest $request
1190          * @return bool
1191          * @private
1192          */
1193         function tokenOk( &$request ) {
1194                 global $wgUser;
1195                 $token = $request->getVal( 'wpEditToken' );
1196                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1197                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1198                 return $this->mTokenOk;
1199         }
1200
1201         /**
1202          * Sets post-edit cookie indicating the user just saved a particular revision.
1203          *
1204          * This uses a temporary cookie for each revision ID so separate saves will never
1205          * interfere with each other.
1206          *
1207          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1208          * the redirect.  It must be clearable by JavaScript code, so it must not be
1209          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1210          * variable.
1211          *
1212          * We use a path of '/' since wgCookiePath is not exposed to JS
1213          *
1214          * If the variable were set on the server, it would be cached, which is unwanted
1215          * since the post-edit state should only apply to the load right after the save.
1216          */
1217         protected function setPostEditCookie() {
1218                 $revisionId = $this->mArticle->getLatest();
1219                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1220
1221                 $response = RequestContext::getMain()->getRequest()->response();
1222                 $response->setcookie( $postEditKey, '1', time() + self::POST_EDIT_COOKIE_DURATION, array(
1223                         'path' => '/',
1224                         'httpOnly' => false,
1225                 ) );
1226         }
1227
1228         /**
1229          * Attempt submission
1230          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1231          * @return bool false if output is done, true if the rest of the form should be displayed
1232          */
1233         public function attemptSave() {
1234                 global $wgUser;
1235
1236                 $resultDetails = false;
1237                 # Allow bots to exempt some edits from bot flagging
1238                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1239                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1240
1241                 return $this->handleStatus( $status, $resultDetails );
1242         }
1243
1244         /**
1245          * Handle status, such as after attempt save
1246          *
1247          * @param Status $status
1248          * @param array|bool $resultDetails
1249          *
1250          * @throws ErrorPageError
1251          * return bool false, if output is done, true if rest of the form should be displayed
1252          */
1253         private function handleStatus( Status $status, $resultDetails ) {
1254                 global $wgUser, $wgOut;
1255
1256                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1257                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1258                         $this->didSave = true;
1259                         if ( !$resultDetails['nullEdit'] ) {
1260                                 $this->setPostEditCookie();
1261                         }
1262                 }
1263
1264                 switch ( $status->value ) {
1265                         case self::AS_HOOK_ERROR_EXPECTED:
1266                         case self::AS_CONTENT_TOO_BIG:
1267                         case self::AS_ARTICLE_WAS_DELETED:
1268                         case self::AS_CONFLICT_DETECTED:
1269                         case self::AS_SUMMARY_NEEDED:
1270                         case self::AS_TEXTBOX_EMPTY:
1271                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1272                         case self::AS_END:
1273                                 return true;
1274
1275                         case self::AS_HOOK_ERROR:
1276                                 return false;
1277
1278                         case self::AS_PARSE_ERROR:
1279                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1280                                 return true;
1281
1282                         case self::AS_SUCCESS_NEW_ARTICLE:
1283                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1284                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1285                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1286                                 return false;
1287
1288                         case self::AS_SUCCESS_UPDATE:
1289                                 $extraQuery = '';
1290                                 $sectionanchor = $resultDetails['sectionanchor'];
1291
1292                                 // Give extensions a chance to modify URL query on update
1293                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1294
1295                                 if ( $resultDetails['redirect'] ) {
1296                                         if ( $extraQuery == '' ) {
1297                                                 $extraQuery = 'redirect=no';
1298                                         } else {
1299                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1300                                         }
1301                                 }
1302                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1303                                 return false;
1304
1305                         case self::AS_BLANK_ARTICLE:
1306                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1307                                 return false;
1308
1309                         case self::AS_SPAM_ERROR:
1310                                 $this->spamPageWithContent( $resultDetails['spam'] );
1311                                 return false;
1312
1313                         case self::AS_BLOCKED_PAGE_FOR_USER:
1314                                 throw new UserBlockedError( $wgUser->getBlock() );
1315
1316                         case self::AS_IMAGE_REDIRECT_ANON:
1317                         case self::AS_IMAGE_REDIRECT_LOGGED:
1318                                 throw new PermissionsError( 'upload' );
1319
1320                         case self::AS_READ_ONLY_PAGE_ANON:
1321                         case self::AS_READ_ONLY_PAGE_LOGGED:
1322                                 throw new PermissionsError( 'edit' );
1323
1324                         case self::AS_READ_ONLY_PAGE:
1325                                 throw new ReadOnlyError;
1326
1327                         case self::AS_RATE_LIMITED:
1328                                 throw new ThrottledError();
1329
1330                         case self::AS_NO_CREATE_PERMISSION:
1331                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1332                                 throw new PermissionsError( $permission );
1333
1334                         default:
1335                                 // We don't recognize $status->value. The only way that can happen
1336                                 // is if an extension hook aborted from inside ArticleSave.
1337                                 // Render the status object into $this->hookError
1338                                 // FIXME this sucks, we should just use the Status object throughout
1339                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1340                                         '</div>';
1341                                 return true;
1342                 }
1343         }
1344
1345         /**
1346          * Run hooks that can filter edits just before they get saved.
1347          *
1348          * @param Content $content The Content to filter.
1349          * @param Status $status For reporting the outcome to the caller
1350          * @param User $user The user performing the edit
1351          *
1352          * @return bool
1353          */
1354         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1355                 // Run old style post-section-merge edit filter
1356                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1357                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1358
1359                         # Error messages etc. could be handled within the hook...
1360                         $status->fatal( 'hookaborted' );
1361                         $status->value = self::AS_HOOK_ERROR;
1362                         return false;
1363                 } elseif ( $this->hookError != '' ) {
1364                         # ...or the hook could be expecting us to produce an error
1365                         $status->fatal( 'hookaborted' );
1366                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1367                         return false;
1368                 }
1369
1370                 // Run new style post-section-merge edit filter
1371                 if ( !wfRunHooks( 'EditFilterMergedContent',
1372                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1373                                 $user, $this->minoredit ) ) ) {
1374
1375                         # Error messages etc. could be handled within the hook...
1376                         // XXX: $status->value may already be something informative...
1377                         $this->hookError = $status->getWikiText();
1378                         $status->fatal( 'hookaborted' );
1379                         $status->value = self::AS_HOOK_ERROR;
1380                         return false;
1381                 } elseif ( !$status->isOK() ) {
1382                         # ...or the hook could be expecting us to produce an error
1383                         // FIXME this sucks, we should just use the Status object throughout
1384                         $this->hookError = $status->getWikiText();
1385                         $status->fatal( 'hookaborted' );
1386                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1387                         return false;
1388                 }
1389
1390                 return true;
1391         }
1392
1393         /**
1394          * Attempt submission (no UI)
1395          *
1396          * @param array $result Array to add statuses to, currently with the possible keys:
1397          *  spam - string - Spam string from content if any spam is detected by matchSpamRegex
1398          *  sectionanchor - string - Section anchor for a section save
1399          *  nullEdit - boolean - Set if doEditContent is OK.  True if null edit, false otherwise.
1400          *  redirect - boolean -  Set if doEditContent is OK.  True if resulting revision is a redirect
1401          * @param bool $bot True if edit is being made under the bot right.
1402          *
1403          * @return Status Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1404          *
1405          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1406          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1407          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1408          */
1409         function internalAttemptSave( &$result, $bot = false ) {
1410                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1411
1412                 $status = Status::newGood();
1413
1414                 wfProfileIn( __METHOD__ );
1415                 wfProfileIn( __METHOD__ . '-checks' );
1416
1417                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1418                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1419                         $status->fatal( 'hookaborted' );
1420                         $status->value = self::AS_HOOK_ERROR;
1421                         wfProfileOut( __METHOD__ . '-checks' );
1422                         wfProfileOut( __METHOD__ );
1423                         return $status;
1424                 }
1425
1426                 $spam = $wgRequest->getText( 'wpAntispam' );
1427                 if ( $spam !== '' ) {
1428                         wfDebugLog(
1429                                 'SimpleAntiSpam',
1430                                 $wgUser->getName() .
1431                                 ' editing "' .
1432                                 $this->mTitle->getPrefixedText() .
1433                                 '" submitted bogus field "' .
1434                                 $spam .
1435                                 '"'
1436                         );
1437                         $status->fatal( 'spamprotectionmatch', false );
1438                         $status->value = self::AS_SPAM_ERROR;
1439                         wfProfileOut( __METHOD__ . '-checks' );
1440                         wfProfileOut( __METHOD__ );
1441                         return $status;
1442                 }
1443
1444                 try {
1445                         # Construct Content object
1446                         $textbox_content = $this->toEditContent( $this->textbox1 );
1447                 } catch ( MWContentSerializationException $ex ) {
1448                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1449                         $status->value = self::AS_PARSE_ERROR;
1450                         wfProfileOut( __METHOD__ . '-checks' );
1451                         wfProfileOut( __METHOD__ );
1452                         return $status;
1453                 }
1454
1455                 # Check image redirect
1456                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1457                         $textbox_content->isRedirect() &&
1458                         !$wgUser->isAllowed( 'upload' ) ) {
1459                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1460                                 $status->setResult( false, $code );
1461
1462                                 wfProfileOut( __METHOD__ . '-checks' );
1463                                 wfProfileOut( __METHOD__ );
1464
1465                                 return $status;
1466                 }
1467
1468                 # Check for spam
1469                 $match = self::matchSummarySpamRegex( $this->summary );
1470                 if ( $match === false && $this->section == 'new' ) {
1471                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1472                         # regular summaries, it is added to the actual wikitext.
1473                         if ( $this->sectiontitle !== '' ) {
1474                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1475                                 $match = self::matchSpamRegex( $this->sectiontitle );
1476                         } else {
1477                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1478                                 # is used with the 'summary' parameter.
1479                                 $match = self::matchSpamRegex( $this->summary );
1480                         }
1481                 }
1482                 if ( $match === false ) {
1483                         $match = self::matchSpamRegex( $this->textbox1 );
1484                 }
1485                 if ( $match !== false ) {
1486                         $result['spam'] = $match;
1487                         $ip = $wgRequest->getIP();
1488                         $pdbk = $this->mTitle->getPrefixedDBkey();
1489                         $match = str_replace( "\n", '', $match );
1490                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1491                         $status->fatal( 'spamprotectionmatch', $match );
1492                         $status->value = self::AS_SPAM_ERROR;
1493                         wfProfileOut( __METHOD__ . '-checks' );
1494                         wfProfileOut( __METHOD__ );
1495                         return $status;
1496                 }
1497                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1498                         # Error messages etc. could be handled within the hook...
1499                         $status->fatal( 'hookaborted' );
1500                         $status->value = self::AS_HOOK_ERROR;
1501                         wfProfileOut( __METHOD__ . '-checks' );
1502                         wfProfileOut( __METHOD__ );
1503                         return $status;
1504                 } elseif ( $this->hookError != '' ) {
1505                         # ...or the hook could be expecting us to produce an error
1506                         $status->fatal( 'hookaborted' );
1507                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1508                         wfProfileOut( __METHOD__ . '-checks' );
1509                         wfProfileOut( __METHOD__ );
1510                         return $status;
1511                 }
1512
1513                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1514                         // Auto-block user's IP if the account was "hard" blocked
1515                         $wgUser->spreadAnyEditBlock();
1516                         # Check block state against master, thus 'false'.
1517                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1518                         wfProfileOut( __METHOD__ . '-checks' );
1519                         wfProfileOut( __METHOD__ );
1520                         return $status;
1521                 }
1522
1523                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1524                 if ( $this->kblength > $wgMaxArticleSize ) {
1525                         // Error will be displayed by showEditForm()
1526                         $this->tooBig = true;
1527                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1528                         wfProfileOut( __METHOD__ . '-checks' );
1529                         wfProfileOut( __METHOD__ );
1530                         return $status;
1531                 }
1532
1533                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1534                         if ( $wgUser->isAnon() ) {
1535                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1536                                 wfProfileOut( __METHOD__ . '-checks' );
1537                                 wfProfileOut( __METHOD__ );
1538                                 return $status;
1539                         } else {
1540                                 $status->fatal( 'readonlytext' );
1541                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1542                                 wfProfileOut( __METHOD__ . '-checks' );
1543                                 wfProfileOut( __METHOD__ );
1544                                 return $status;
1545                         }
1546                 }
1547
1548                 if ( wfReadOnly() ) {
1549                         $status->fatal( 'readonlytext' );
1550                         $status->value = self::AS_READ_ONLY_PAGE;
1551                         wfProfileOut( __METHOD__ . '-checks' );
1552                         wfProfileOut( __METHOD__ );
1553                         return $status;
1554                 }
1555                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1556                         $status->fatal( 'actionthrottledtext' );
1557                         $status->value = self::AS_RATE_LIMITED;
1558                         wfProfileOut( __METHOD__ . '-checks' );
1559                         wfProfileOut( __METHOD__ );
1560                         return $status;
1561                 }
1562
1563                 # If the article has been deleted while editing, don't save it without
1564                 # confirmation
1565                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1566                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1567                         wfProfileOut( __METHOD__ . '-checks' );
1568                         wfProfileOut( __METHOD__ );
1569                         return $status;
1570                 }
1571
1572                 wfProfileOut( __METHOD__ . '-checks' );
1573
1574                 # Load the page data from the master. If anything changes in the meantime,
1575                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1576                 $this->mArticle->loadPageData( 'fromdbmaster' );
1577                 $new = !$this->mArticle->exists();
1578
1579                 if ( $new ) {
1580                         // Late check for create permission, just in case *PARANOIA*
1581                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1582                                 $status->fatal( 'nocreatetext' );
1583                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1584                                 wfDebug( __METHOD__ . ": no create permission\n" );
1585                                 wfProfileOut( __METHOD__ );
1586                                 return $status;
1587                         }
1588
1589                         // Don't save a new page if it's blank or if it's a MediaWiki:
1590                         // message with content equivalent to default (allow empty pages
1591                         // in this case to disable messages, see bug 50124)
1592                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1593                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1594                                 $defaultText = $defaultMessageText;
1595                         } else {
1596                                 $defaultText = '';
1597                         }
1598
1599                         if ( $this->textbox1 === $defaultText ) {
1600                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1601                                 wfProfileOut( __METHOD__ );
1602                                 return $status;
1603                         }
1604
1605                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1606                                 wfProfileOut( __METHOD__ );
1607                                 return $status;
1608                         }
1609
1610                         $content = $textbox_content;
1611
1612                         $result['sectionanchor'] = '';
1613                         if ( $this->section == 'new' ) {
1614                                 if ( $this->sectiontitle !== '' ) {
1615                                         // Insert the section title above the content.
1616                                         $content = $content->addSectionHeader( $this->sectiontitle );
1617
1618                                         // Jump to the new section
1619                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1620
1621                                         // If no edit summary was specified, create one automatically from the section
1622                                         // title and have it link to the new section. Otherwise, respect the summary as
1623                                         // passed.
1624                                         if ( $this->summary === '' ) {
1625                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1626                                                 $this->summary = wfMessage( 'newsectionsummary' )
1627                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1628                                         }
1629                                 } elseif ( $this->summary !== '' ) {
1630                                         // Insert the section title above the content.
1631                                         $content = $content->addSectionHeader( $this->summary );
1632
1633                                         // Jump to the new section
1634                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1635
1636                                         // Create a link to the new section from the edit summary.
1637                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1638                                         $this->summary = wfMessage( 'newsectionsummary' )
1639                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1640                                 }
1641                         }
1642
1643                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1644
1645                 } else { # not $new
1646
1647                         # Article exists. Check for edit conflict.
1648
1649                         $this->mArticle->clear(); # Force reload of dates, etc.
1650                         $timestamp = $this->mArticle->getTimestamp();
1651
1652                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1653
1654                         if ( $timestamp != $this->edittime ) {
1655                                 $this->isConflict = true;
1656                                 if ( $this->section == 'new' ) {
1657                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1658                                                 $this->mArticle->getComment() == $this->summary ) {
1659                                                 // Probably a duplicate submission of a new comment.
1660                                                 // This can happen when squid resends a request after
1661                                                 // a timeout but the first one actually went through.
1662                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1663                                         } else {
1664                                                 // New comment; suppress conflict.
1665                                                 $this->isConflict = false;
1666                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1667                                         }
1668                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1669                                                         $wgUser->getId(), $this->edittime ) ) {
1670                                         # Suppress edit conflict with self, except for section edits where merging is required.
1671                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1672                                         $this->isConflict = false;
1673                                 }
1674                         }
1675
1676                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1677                         if ( $this->sectiontitle !== '' ) {
1678                                 $sectionTitle = $this->sectiontitle;
1679                         } else {
1680                                 $sectionTitle = $this->summary;
1681                         }
1682
1683                         $content = null;
1684
1685                         if ( $this->isConflict ) {
1686                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1687                                                 . " (article time '{$timestamp}')\n" );
1688
1689                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1690                         } else {
1691                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1692                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1693                         }
1694
1695                         if ( is_null( $content ) ) {
1696                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1697                                 $this->isConflict = true;
1698                                 $content = $textbox_content; // do not try to merge here!
1699                         } elseif ( $this->isConflict ) {
1700                                 # Attempt merge
1701                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1702                                         // Successful merge! Maybe we should tell the user the good news?
1703                                         $this->isConflict = false;
1704                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1705                                 } else {
1706                                         $this->section = '';
1707                                         $this->textbox1 = ContentHandler::getContentText( $content );
1708                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1709                                 }
1710                         }
1711
1712                         if ( $this->isConflict ) {
1713                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1714                                 wfProfileOut( __METHOD__ );
1715                                 return $status;
1716                         }
1717
1718                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1719                                 wfProfileOut( __METHOD__ );
1720                                 return $status;
1721                         }
1722
1723                         if ( $this->section == 'new' ) {
1724                                 // Handle the user preference to force summaries here
1725                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1726                                         $this->missingSummary = true;
1727                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1728                                         $status->value = self::AS_SUMMARY_NEEDED;
1729                                         wfProfileOut( __METHOD__ );
1730                                         return $status;
1731                                 }
1732
1733                                 // Do not allow the user to post an empty comment
1734                                 if ( $this->textbox1 == '' ) {
1735                                         $this->missingComment = true;
1736                                         $status->fatal( 'missingcommenttext' );
1737                                         $status->value = self::AS_TEXTBOX_EMPTY;
1738                                         wfProfileOut( __METHOD__ );
1739                                         return $status;
1740                                 }
1741                         } elseif ( !$this->allowBlankSummary
1742                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1743                                 && !$content->isRedirect()
1744                                 && md5( $this->summary ) == $this->autoSumm
1745                         ) {
1746                                 $this->missingSummary = true;
1747                                 $status->fatal( 'missingsummary' );
1748                                 $status->value = self::AS_SUMMARY_NEEDED;
1749                                 wfProfileOut( __METHOD__ );
1750                                 return $status;
1751                         }
1752
1753                         # All's well
1754                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1755                         $sectionanchor = '';
1756                         if ( $this->section == 'new' ) {
1757                                 if ( $this->sectiontitle !== '' ) {
1758                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1759                                         // If no edit summary was specified, create one automatically from the section
1760                                         // title and have it link to the new section. Otherwise, respect the summary as
1761                                         // passed.
1762                                         if ( $this->summary === '' ) {
1763                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1764                                                 $this->summary = wfMessage( 'newsectionsummary' )
1765                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1766                                         }
1767                                 } elseif ( $this->summary !== '' ) {
1768                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1769                                         # This is a new section, so create a link to the new section
1770                                         # in the revision summary.
1771                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1772                                         $this->summary = wfMessage( 'newsectionsummary' )
1773                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1774                                 }
1775                         } elseif ( $this->section != '' ) {
1776                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1777                                 # XXX: might be better to integrate this into Article::replaceSection
1778                                 # for duplicate heading checking and maybe parsing
1779                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1780                                 # we can't deal with anchors, includes, html etc in the header for now,
1781                                 # headline would need to be parsed to improve this
1782                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1783                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1784                                 }
1785                         }
1786                         $result['sectionanchor'] = $sectionanchor;
1787                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1788
1789                         // Save errors may fall down to the edit form, but we've now
1790                         // merged the section into full text. Clear the section field
1791                         // so that later submission of conflict forms won't try to
1792                         // replace that into a duplicated mess.
1793                         $this->textbox1 = $this->toEditText( $content );
1794                         $this->section = '';
1795
1796                         $status->value = self::AS_SUCCESS_UPDATE;
1797                 }
1798
1799                 // Check for length errors again now that the section is merged in
1800                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1801                 if ( $this->kblength > $wgMaxArticleSize ) {
1802                         $this->tooBig = true;
1803                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1804                         wfProfileOut( __METHOD__ );
1805                         return $status;
1806                 }
1807
1808                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1809                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1810                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1811                         ( $bot ? EDIT_FORCE_BOT : 0 );
1812
1813                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1814                                                                                                                         false, null, $this->contentFormat );
1815
1816                 if ( !$doEditStatus->isOK() ) {
1817                         // Failure from doEdit()
1818                         // Show the edit conflict page for certain recognized errors from doEdit(),
1819                         // but don't show it for errors from extension hooks
1820                         $errors = $doEditStatus->getErrorsArray();
1821                         if ( in_array( $errors[0][0],
1822                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1823                         ) {
1824                                 $this->isConflict = true;
1825                                 // Destroys data doEdit() put in $status->value but who cares
1826                                 $doEditStatus->value = self::AS_END;
1827                         }
1828                         wfProfileOut( __METHOD__ );
1829                         return $doEditStatus;
1830                 }
1831
1832                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1833                 if ( $result['nullEdit'] ) {
1834                         // We don't know if it was a null edit until now, so increment here
1835                         $wgUser->pingLimiter( 'linkpurge' );
1836                 }
1837                 $result['redirect'] = $content->isRedirect();
1838                 $this->updateWatchlist();
1839                 wfProfileOut( __METHOD__ );
1840                 return $status;
1841         }
1842
1843         /**
1844          * Register the change of watch status
1845          */
1846         protected function updateWatchlist() {
1847                 global $wgUser;
1848
1849                 if ( $wgUser->isLoggedIn()
1850                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1851                 ) {
1852                         $fname = __METHOD__;
1853                         $title = $this->mTitle;
1854                         $watch = $this->watchthis;
1855
1856                         // Do this in its own transaction to reduce contention...
1857                         $dbw = wfGetDB( DB_MASTER );
1858                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1859                                 $dbw->begin( $fname );
1860                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1861                                 $dbw->commit( $fname );
1862                         } );
1863                 }
1864         }
1865
1866         /**
1867          * Attempts to merge text content with base and current revisions
1868          *
1869          * @param string $editText
1870          *
1871          * @return bool
1872          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1873          */
1874         function mergeChangesInto( &$editText ) {
1875                 ContentHandler::deprecated( __METHOD__, "1.21" );
1876
1877                 $editContent = $this->toEditContent( $editText );
1878
1879                 $ok = $this->mergeChangesIntoContent( $editContent );
1880
1881                 if ( $ok ) {
1882                         $editText = $this->toEditText( $editContent );
1883                         return true;
1884                 }
1885                 return false;
1886         }
1887
1888         /**
1889          * Attempts to do 3-way merge of edit content with a base revision
1890          * and current content, in case of edit conflict, in whichever way appropriate
1891          * for the content type.
1892          *
1893          * @since 1.21
1894          *
1895          * @param Content $editContent
1896          *
1897          * @return bool
1898          */
1899         private function mergeChangesIntoContent( &$editContent ) {
1900                 wfProfileIn( __METHOD__ );
1901
1902                 $db = wfGetDB( DB_MASTER );
1903
1904                 // This is the revision the editor started from
1905                 $baseRevision = $this->getBaseRevision();
1906                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1907
1908                 if ( is_null( $baseContent ) ) {
1909                         wfProfileOut( __METHOD__ );
1910                         return false;
1911                 }
1912
1913                 // The current state, we want to merge updates into it
1914                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1915                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1916
1917                 if ( is_null( $currentContent ) ) {
1918                         wfProfileOut( __METHOD__ );
1919                         return false;
1920                 }
1921
1922                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1923
1924                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1925
1926                 if ( $result ) {
1927                         $editContent = $result;
1928                         wfProfileOut( __METHOD__ );
1929                         return true;
1930                 }
1931
1932                 wfProfileOut( __METHOD__ );
1933                 return false;
1934         }
1935
1936         /**
1937          * @return Revision
1938          */
1939         function getBaseRevision() {
1940                 if ( !$this->mBaseRevision ) {
1941                         $db = wfGetDB( DB_MASTER );
1942                         $this->mBaseRevision = Revision::loadFromTimestamp(
1943                                 $db, $this->mTitle, $this->edittime );
1944                 }
1945                 return $this->mBaseRevision;
1946         }
1947
1948         /**
1949          * Check given input text against $wgSpamRegex, and return the text of the first match.
1950          *
1951          * @param string $text
1952          *
1953          * @return string|bool Matching string or false
1954          */
1955         public static function matchSpamRegex( $text ) {
1956                 global $wgSpamRegex;
1957                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1958                 $regexes = (array)$wgSpamRegex;
1959                 return self::matchSpamRegexInternal( $text, $regexes );
1960         }
1961
1962         /**
1963          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
1964          *
1965          * @param string $text
1966          *
1967          * @return string|bool Matching string or false
1968          */
1969         public static function matchSummarySpamRegex( $text ) {
1970                 global $wgSummarySpamRegex;
1971                 $regexes = (array)$wgSummarySpamRegex;
1972                 return self::matchSpamRegexInternal( $text, $regexes );
1973         }
1974
1975         /**
1976          * @param string $text
1977          * @param array $regexes
1978          * @return bool|string
1979          */
1980         protected static function matchSpamRegexInternal( $text, $regexes ) {
1981                 foreach ( $regexes as $regex ) {
1982                         $matches = array();
1983                         if ( preg_match( $regex, $text, $matches ) ) {
1984                                 return $matches[0];
1985                         }
1986                 }
1987                 return false;
1988         }
1989
1990         function setHeaders() {
1991                 global $wgOut, $wgUser;
1992
1993                 $wgOut->addModules( 'mediawiki.action.edit' );
1994                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
1995
1996                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1997                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1998                 }
1999
2000                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2001                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2002                 }
2003
2004                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2005
2006                 # Enabled article-related sidebar, toplinks, etc.
2007                 $wgOut->setArticleRelated( true );
2008
2009                 $contextTitle = $this->getContextTitle();
2010                 if ( $this->isConflict ) {
2011                         $msg = 'editconflict';
2012                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2013                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2014                 } else {
2015                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
2016                                 'editing' : 'creating';
2017                 }
2018                 # Use the title defined by DISPLAYTITLE magic word when present
2019                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2020                 if ( $displayTitle === false ) {
2021                         $displayTitle = $contextTitle->getPrefixedText();
2022                 }
2023                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2024         }
2025
2026         /**
2027          * Show all applicable editing introductions
2028          */
2029         protected function showIntro() {
2030                 global $wgOut, $wgUser;
2031                 if ( $this->suppressIntro ) {
2032                         return;
2033                 }
2034
2035                 $namespace = $this->mTitle->getNamespace();
2036
2037                 if ( $namespace == NS_MEDIAWIKI ) {
2038                         # Show a warning if editing an interface message
2039                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2040                 } elseif ( $namespace == NS_FILE ) {
2041                         # Show a hint to shared repo
2042                         $file = wfFindFile( $this->mTitle );
2043                         if ( $file && !$file->isLocal() ) {
2044                                 $descUrl = $file->getDescriptionUrl();
2045                                 # there must be a description url to show a hint to shared repo
2046                                 if ( $descUrl ) {
2047                                         if ( !$this->mTitle->exists() ) {
2048                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2049                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2050                                                 ) );
2051                                         } else {
2052                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2053                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2054                                                 ) );
2055                                         }
2056                                 }
2057                         }
2058                 }
2059
2060                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2061                 # Show log extract when the user is currently blocked
2062                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2063                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2064                         $username = $parts[0];
2065                         $user = User::newFromName( $username, false /* allow IP users*/ );
2066                         $ip = User::isIP( $username );
2067                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2068                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2069                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2070                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
2071                                 LogEventsList::showLogExtract(
2072                                         $wgOut,
2073                                         'block',
2074                                         $user->getUserPage(),
2075                                         '',
2076                                         array(
2077                                                 'lim' => 1,
2078                                                 'showIfEmpty' => false,
2079                                                 'msgKey' => array(
2080                                                         'blocked-notice-logextract',
2081                                                         $user->getName() # Support GENDER in notice
2082                                                 )
2083                                         )
2084                                 );
2085                         }
2086                 }
2087                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2088                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2089                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2090                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2091                         ) );
2092                         if ( $wgUser->isLoggedIn() ) {
2093                                 $wgOut->wrapWikiMsg(
2094                                         // Suppress the external link icon, consider the help url an internal one
2095                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2096                                         array(
2097                                                 'newarticletext',
2098                                                 $helpLink
2099                                         )
2100                                 );
2101                         } else {
2102                                 $wgOut->wrapWikiMsg(
2103                                         // Suppress the external link icon, consider the help url an internal one
2104                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2105                                         array(
2106                                                 'newarticletextanon',
2107                                                 $helpLink
2108                                         )
2109                                 );
2110                         }
2111                 }
2112                 # Give a notice if the user is editing a deleted/moved page...
2113                 if ( !$this->mTitle->exists() ) {
2114                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2115                                 '',
2116                                 array(
2117                                         'lim' => 10,
2118                                         'conds' => array( "log_action != 'revision'" ),
2119                                         'showIfEmpty' => false,
2120                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2121                                 )
2122                         );
2123                 }
2124         }
2125
2126         /**
2127          * Attempt to show a custom editing introduction, if supplied
2128          *
2129          * @return bool
2130          */
2131         protected function showCustomIntro() {
2132                 if ( $this->editintro ) {
2133                         $title = Title::newFromText( $this->editintro );
2134                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2135                                 global $wgOut;
2136                                 // Added using template syntax, to take <noinclude>'s into account.
2137                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2138                                 return true;
2139                         }
2140                 }
2141                 return false;
2142         }
2143
2144         /**
2145          * Gets an editable textual representation of $content.
2146          * The textual representation can be turned by into a Content object by the
2147          * toEditContent() method.
2148          *
2149          * If $content is null or false or a string, $content is returned unchanged.
2150          *
2151          * If the given Content object is not of a type that can be edited using the text base EditPage,
2152          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2153          * content.
2154          *
2155          * @param Content|null|bool|string $content
2156          * @return string The editable text form of the content.
2157          *
2158          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
2159          */
2160         protected function toEditText( $content ) {
2161                 if ( $content === null || $content === false ) {
2162                         return $content;
2163                 }
2164
2165                 if ( is_string( $content ) ) {
2166                         return $content;
2167                 }
2168
2169                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2170                         throw new MWException( 'This content model is not supported: '
2171                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2172                 }
2173
2174                 return $content->serialize( $this->contentFormat );
2175         }
2176
2177         /**
2178          * Turns the given text into a Content object by unserializing it.
2179          *
2180          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2181          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2182          * content.
2183          *
2184          * @param string|null|bool $text Text to unserialize
2185          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2186          *                 returned instead.
2187          *
2188          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2189          *          and $this->allowNonTextContent is not true.
2190          */
2191         protected function toEditContent( $text ) {
2192                 if ( $text === false || $text === null ) {
2193                         return $text;
2194                 }
2195
2196                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2197                         $this->contentModel, $this->contentFormat );
2198
2199                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2200                         throw new MWException( 'This content model is not supported: '
2201                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2202                 }
2203
2204                 return $content;
2205         }
2206
2207         /**
2208          * Send the edit form and related headers to $wgOut
2209          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2210          *     during form output near the top, for captchas and the like.
2211          */
2212         function showEditForm( $formCallback = null ) {
2213                 global $wgOut, $wgUser;
2214
2215                 wfProfileIn( __METHOD__ );
2216
2217                 # need to parse the preview early so that we know which templates are used,
2218                 # otherwise users with "show preview after edit box" will get a blank list
2219                 # we parse this near the beginning so that setHeaders can do the title
2220                 # setting work instead of leaving it in getPreviewText
2221                 $previewOutput = '';
2222                 if ( $this->formtype == 'preview' ) {
2223                         $previewOutput = $this->getPreviewText();
2224                 }
2225
2226                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2227
2228                 $this->setHeaders();
2229
2230                 if ( $this->showHeader() === false ) {
2231                         wfProfileOut( __METHOD__ );
2232                         return;
2233                 }
2234
2235                 $wgOut->addHTML( $this->editFormPageTop );
2236
2237                 if ( $wgUser->getOption( 'previewontop' ) ) {
2238                         $this->displayPreviewArea( $previewOutput, true );
2239                 }
2240
2241                 $wgOut->addHTML( $this->editFormTextTop );
2242
2243                 $showToolbar = true;
2244                 if ( $this->wasDeletedSinceLastEdit() ) {
2245                         if ( $this->formtype == 'save' ) {
2246                                 // Hide the toolbar and edit area, user can click preview to get it back
2247                                 // Add an confirmation checkbox and explanation.
2248                                 $showToolbar = false;
2249                         } else {
2250                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2251                                         'deletedwhileediting' );
2252                         }
2253                 }
2254
2255                 // @todo add EditForm plugin interface and use it here!
2256                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2257                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2258                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2259                         'enctype' => 'multipart/form-data' ) ) );
2260
2261                 if ( is_callable( $formCallback ) ) {
2262                         call_user_func_array( $formCallback, array( &$wgOut ) );
2263                 }
2264
2265                 // Add an empty field to trip up spambots
2266                 $wgOut->addHTML(
2267                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2268                         . Html::rawElement( 'label', array( 'for' => 'wpAntiSpam' ), wfMessage( 'simpleantispam-label' )->parse() )
2269                         . Xml::element( 'input', array( 'type' => 'text', 'name' => 'wpAntispam', 'id' => 'wpAntispam', 'value' => '' ) )
2270                         . Xml::closeElement( 'div' )
2271                 );
2272
2273                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2274
2275                 // Put these up at the top to ensure they aren't lost on early form submission
2276                 $this->showFormBeforeText();
2277
2278                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2279                         $username = $this->lastDelete->user_name;
2280                         $comment = $this->lastDelete->log_comment;
2281
2282                         // It is better to not parse the comment at all than to have templates expanded in the middle
2283                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2284                         $key = $comment === ''
2285                                 ? 'confirmrecreate-noreason'
2286                                 : 'confirmrecreate';
2287                         $wgOut->addHTML(
2288                                 '<div class="mw-confirm-recreate">' .
2289                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2290                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2291                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2292                                 ) .
2293                                 '</div>'
2294                         );
2295                 }
2296
2297                 # When the summary is hidden, also hide them on preview/show changes
2298                 if ( $this->nosummary ) {
2299                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2300                 }
2301
2302                 # If a blank edit summary was previously provided, and the appropriate
2303                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2304                 # user being bounced back more than once in the event that a summary
2305                 # is not required.
2306                 #####
2307                 # For a bit more sophisticated detection of blank summaries, hash the
2308                 # automatic one and pass that in the hidden field wpAutoSummary.
2309                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2310                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2311                 }
2312
2313                 if ( $this->undidRev ) {
2314                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2315                 }
2316
2317                 if ( $this->hasPresetSummary ) {
2318                         // If a summary has been preset using &summary= we don't want to prompt for
2319                         // a different summary. Only prompt for a summary if the summary is blanked.
2320                         // (Bug 17416)
2321                         $this->autoSumm = md5( '' );
2322                 }
2323
2324                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2325                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2326
2327                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2328
2329                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2330                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2331
2332                 if ( $this->section == 'new' ) {
2333                         $this->showSummaryInput( true, $this->summary );
2334                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2335                 }
2336
2337                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2338
2339                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2340                         $wgOut->addHTML( EditPage::getEditToolbar() );
2341                 }
2342
2343                 if ( $this->isConflict ) {
2344                         // In an edit conflict bypass the overridable content form method
2345                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2346                         // resolved between page source edits and custom ui edits using the
2347                         // custom edit ui.
2348                         $this->textbox2 = $this->textbox1;
2349
2350                         $content = $this->getCurrentContent();
2351                         $this->textbox1 = $this->toEditText( $content );
2352
2353                         $this->showTextbox1();
2354                 } else {
2355                         $this->showContentForm();
2356                 }
2357
2358                 $wgOut->addHTML( $this->editFormTextAfterContent );
2359
2360                 $this->showStandardInputs();
2361
2362                 $this->showFormAfterText();
2363
2364                 $this->showTosSummary();
2365
2366                 $this->showEditTools();
2367
2368                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2369
2370                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2371                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2372
2373                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2374                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2375
2376                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2377                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2378
2379                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2380
2381                 if ( $this->isConflict ) {
2382                         try {
2383                                 $this->showConflict();
2384                         } catch ( MWContentSerializationException $ex ) {
2385                                 // this can't really happen, but be nice if it does.
2386                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2387                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2388                         }
2389                 }
2390
2391                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2392
2393                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2394                         $this->displayPreviewArea( $previewOutput, false );
2395                 }
2396
2397                 wfProfileOut( __METHOD__ );
2398         }
2399
2400         /**
2401          * Extract the section title from current section text, if any.
2402          *
2403          * @param string $text
2404          * @return string|bool string or false
2405          */
2406         public static function extractSectionTitle( $text ) {
2407                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2408                 if ( !empty( $matches[2] ) ) {
2409                         global $wgParser;
2410                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2411                 } else {
2412                         return false;
2413                 }
2414         }
2415
2416         protected function showHeader() {
2417                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2418
2419                 if ( $this->mTitle->isTalkPage() ) {
2420                         $wgOut->addWikiMsg( 'talkpagetext' );
2421                 }
2422
2423                 // Add edit notices
2424                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2425
2426                 if ( $this->isConflict ) {
2427                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2428                         $this->edittime = $this->mArticle->getTimestamp();
2429                 } else {
2430                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2431                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2432                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2433                                 // Someone is welcome to try refactoring though
2434                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2435                                 return false;
2436                         }
2437
2438                         if ( $this->section != '' && $this->section != 'new' ) {
2439                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2440                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2441                                         if ( $sectionTitle !== false ) {
2442                                                 $this->summary = "/* $sectionTitle */ ";
2443                                         }
2444                                 }
2445                         }
2446
2447                         if ( $this->missingComment ) {
2448                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2449                         }
2450
2451                         if ( $this->missingSummary && $this->section != 'new' ) {
2452                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2453                         }
2454
2455                         if ( $this->missingSummary && $this->section == 'new' ) {
2456                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2457                         }
2458
2459                         if ( $this->hookError !== '' ) {
2460                                 $wgOut->addWikiText( $this->hookError );
2461                         }
2462
2463                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2464                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2465                         }
2466
2467                         if ( $this->section != 'new' ) {
2468                                 $revision = $this->mArticle->getRevisionFetched();
2469                                 if ( $revision ) {
2470                                         // Let sysop know that this will make private content public if saved
2471
2472                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2473                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2474                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2475                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2476                                         }
2477
2478                                         if ( !$revision->isCurrent() ) {
2479                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2480                                                 $wgOut->addWikiMsg( 'editingold' );
2481                                         }
2482                                 } elseif ( $this->mTitle->exists() ) {
2483                                         // Something went wrong
2484
2485                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2486                                                 array( 'missing-revision', $this->oldid ) );
2487                                 }
2488                         }
2489                 }
2490
2491                 if ( wfReadOnly() ) {
2492                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2493                 } elseif ( $wgUser->isAnon() ) {
2494                         if ( $this->formtype != 'preview' ) {
2495                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2496                         } else {
2497                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2498                         }
2499                 } else {
2500                         if ( $this->isCssJsSubpage ) {
2501                                 # Check the skin exists
2502                                 if ( $this->isWrongCaseCssJsPage ) {
2503                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2504                                 }
2505                                 if ( $this->formtype !== 'preview' ) {
2506                                         if ( $this->isCssSubpage ) {
2507                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2508                                         }
2509
2510                                         if ( $this->isJsSubpage ) {
2511                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2512                                         }
2513                                 }
2514                         }
2515                 }
2516
2517                 if ( $this->mTitle->isProtected( 'edit' ) &&
2518                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2519                 ) {
2520                         # Is the title semi-protected?
2521                         if ( $this->mTitle->isSemiProtected() ) {
2522                                 $noticeMsg = 'semiprotectedpagewarning';
2523                         } else {
2524                                 # Then it must be protected based on static groups (regular)
2525                                 $noticeMsg = 'protectedpagewarning';
2526                         }
2527                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2528                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2529                 }
2530                 if ( $this->mTitle->isCascadeProtected() ) {
2531                         # Is this page under cascading protection from some source pages?
2532                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2533                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2534                         $cascadeSourcesCount = count( $cascadeSources );
2535                         if ( $cascadeSourcesCount > 0 ) {
2536                                 # Explain, and list the titles responsible
2537                                 foreach ( $cascadeSources as $page ) {
2538                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2539                                 }
2540                         }
2541                         $notice .= '</div>';
2542                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2543                 }
2544                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2545                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2546                                 array( 'lim' => 1,
2547                                         'showIfEmpty' => false,
2548                                         'msgKey' => array( 'titleprotectedwarning' ),
2549                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2550                 }
2551
2552                 if ( $this->kblength === false ) {
2553                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2554                 }
2555
2556                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2557                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2558                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2559                 } else {
2560                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2561                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2562                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2563                                 );
2564                         }
2565                 }
2566                 # Add header copyright warning
2567                 $this->showHeaderCopyrightWarning();
2568         }
2569
2570         /**
2571          * Standard summary input and label (wgSummary), abstracted so EditPage
2572          * subclasses may reorganize the form.
2573          * Note that you do not need to worry about the label's for=, it will be
2574          * inferred by the id given to the input. You can remove them both by
2575          * passing array( 'id' => false ) to $userInputAttrs.
2576          *
2577          * @param string $summary The value of the summary input
2578          * @param string $labelText The html to place inside the label
2579          * @param array $inputAttrs Array of attrs to use on the input
2580          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2581          *
2582          * @return array An array in the format array( $label, $input )
2583          */
2584         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2585                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2586                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2587                         'id' => 'wpSummary',
2588                         'maxlength' => '200',
2589                         'tabindex' => '1',
2590                         'size' => 60,
2591                         'spellcheck' => 'true',
2592                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2593
2594                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2595                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2596                         'id' => "wpSummaryLabel"
2597                 );
2598
2599                 $label = null;
2600                 if ( $labelText ) {
2601                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2602                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2603                 }
2604
2605                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2606
2607                 return array( $label, $input );
2608         }
2609
2610         /**
2611          * @param bool $isSubjectPreview true if this is the section subject/title
2612          *   up top, or false if this is the comment summary
2613          *   down below the textarea
2614          * @param string $summary The text of the summary to display
2615          * @return string
2616          */
2617         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2618                 global $wgOut, $wgContLang;
2619                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2620                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2621                 if ( $isSubjectPreview ) {
2622                         if ( $this->nosummary ) {
2623                                 return;
2624                         }
2625                 } else {
2626                         if ( !$this->mShowSummaryField ) {
2627                                 return;
2628                         }
2629                 }
2630                 $summary = $wgContLang->recodeForEdit( $summary );
2631                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2632                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2633                 $wgOut->addHTML( "{$label} {$input}" );
2634         }
2635
2636         /**
2637          * @param bool $isSubjectPreview true if this is the section subject/title
2638          *   up top, or false if this is the comment summary
2639          *   down below the textarea
2640          * @param string $summary The text of the summary to display
2641          * @return string
2642          */
2643         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2644                 // avoid spaces in preview, gets always trimmed on save
2645                 $summary = trim( $summary );
2646                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2647                         return "";
2648                 }
2649
2650                 global $wgParser;
2651
2652                 if ( $isSubjectPreview ) {
2653                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2654                                 ->inContentLanguage()->text();
2655                 }
2656
2657                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2658
2659                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2660                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2661         }
2662
2663         protected function showFormBeforeText() {
2664                 global $wgOut;
2665                 $section = htmlspecialchars( $this->section );
2666                 $wgOut->addHTML( <<<HTML
2667 <input type='hidden' value="{$section}" name="wpSection" />
2668 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2669 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2670 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2671
2672 HTML
2673                 );
2674                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2675                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2676                 }
2677         }
2678
2679         protected function showFormAfterText() {
2680                 global $wgOut, $wgUser;
2681                 /**
2682                  * To make it harder for someone to slip a user a page
2683                  * which submits an edit form to the wiki without their
2684                  * knowledge, a random token is associated with the login
2685                  * session. If it's not passed back with the submission,
2686                  * we won't save the page, or render user JavaScript and
2687                  * CSS previews.
2688                  *
2689                  * For anon editors, who may not have a session, we just
2690                  * include the constant suffix to prevent editing from
2691                  * broken text-mangling proxies.
2692                  */
2693                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2694         }
2695
2696         /**
2697          * Subpage overridable method for printing the form for page content editing
2698          * By default this simply outputs wpTextbox1
2699          * Subclasses can override this to provide a custom UI for editing;
2700          * be it a form, or simply wpTextbox1 with a modified content that will be
2701          * reverse modified when extracted from the post data.
2702          * Note that this is basically the inverse for importContentFormData
2703          */
2704         protected function showContentForm() {
2705                 $this->showTextbox1();
2706         }
2707
2708         /**
2709          * Method to output wpTextbox1
2710          * The $textoverride method can be used by subclasses overriding showContentForm
2711          * to pass back to this method.
2712          *
2713          * @param array $customAttribs Array of html attributes to use in the textarea
2714          * @param string $textoverride Optional text to override $this->textarea1 with
2715          */
2716         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2717                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2718                         $attribs = array( 'style' => 'display:none;' );
2719                 } else {
2720                         $classes = array(); // Textarea CSS
2721                         if ( $this->mTitle->isProtected( 'edit' ) &&
2722                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2723                         ) {
2724                                 # Is the title semi-protected?
2725                                 if ( $this->mTitle->isSemiProtected() ) {
2726                                         $classes[] = 'mw-textarea-sprotected';
2727                                 } else {
2728                                         # Then it must be protected based on static groups (regular)
2729                                         $classes[] = 'mw-textarea-protected';
2730                                 }
2731                                 # Is the title cascade-protected?
2732                                 if ( $this->mTitle->isCascadeProtected() ) {
2733                                         $classes[] = 'mw-textarea-cprotected';
2734                                 }
2735                         }
2736
2737                         $attribs = array( 'tabindex' => 1 );
2738
2739                         if ( is_array( $customAttribs ) ) {
2740                                 $attribs += $customAttribs;
2741                         }
2742
2743                         if ( count( $classes ) ) {
2744                                 if ( isset( $attribs['class'] ) ) {
2745                                         $classes[] = $attribs['class'];
2746                                 }
2747                                 $attribs['class'] = implode( ' ', $classes );
2748                         }
2749                 }
2750
2751                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2752         }
2753
2754         protected function showTextbox2() {
2755                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2756         }
2757
2758         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2759                 global $wgOut, $wgUser;
2760
2761                 $wikitext = $this->safeUnicodeOutput( $text );
2762                 if ( strval( $wikitext ) !== '' ) {
2763                         // Ensure there's a newline at the end, otherwise adding lines
2764                         // is awkward.
2765                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2766                         // mode will show an extra newline. A bit annoying.
2767                         $wikitext .= "\n";
2768                 }
2769
2770                 $attribs = $customAttribs + array(
2771                         'accesskey' => ',',
2772                         'id' => $name,
2773                         'cols' => $wgUser->getIntOption( 'cols' ),
2774                         'rows' => $wgUser->getIntOption( 'rows' ),
2775                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2776                 );
2777
2778                 $pageLang = $this->mTitle->getPageLanguage();
2779                 $attribs['lang'] = $pageLang->getCode();
2780                 $attribs['dir'] = $pageLang->getDir();
2781
2782                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2783         }
2784
2785         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2786                 global $wgOut;
2787                 $classes = array();
2788                 if ( $isOnTop ) {
2789                         $classes[] = 'ontop';
2790                 }
2791
2792                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2793
2794                 if ( $this->formtype != 'preview' ) {
2795                         $attribs['style'] = 'display: none;';
2796                 }
2797
2798                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2799
2800                 if ( $this->formtype == 'preview' ) {
2801                         $this->showPreview( $previewOutput );
2802                 }
2803
2804                 $wgOut->addHTML( '</div>' );
2805
2806                 if ( $this->formtype == 'diff' ) {
2807                         try {
2808                                 $this->showDiff();
2809                         } catch ( MWContentSerializationException $ex ) {
2810                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2811                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2812                         }
2813                 }
2814         }
2815
2816         /**
2817          * Append preview output to $wgOut.
2818          * Includes category rendering if this is a category page.
2819          *
2820          * @param string $text The HTML to be output for the preview.
2821          */
2822         protected function showPreview( $text ) {
2823                 global $wgOut;
2824                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2825                         $this->mArticle->openShowCategory();
2826                 }
2827                 # This hook seems slightly odd here, but makes things more
2828                 # consistent for extensions.
2829                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2830                 $wgOut->addHTML( $text );
2831                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2832                         $this->mArticle->closeShowCategory();
2833                 }
2834         }
2835
2836         /**
2837          * Get a diff between the current contents of the edit box and the
2838          * version of the page we're editing from.
2839          *
2840          * If this is a section edit, we'll replace the section as for final
2841          * save and then make a comparison.
2842          */
2843         function showDiff() {
2844                 global $wgUser, $wgContLang, $wgOut;
2845
2846                 $oldtitlemsg = 'currentrev';
2847                 # if message does not exist, show diff against the preloaded default
2848                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2849                         $oldtext = $this->mTitle->getDefaultMessageText();
2850                         if ( $oldtext !== false ) {
2851                                 $oldtitlemsg = 'defaultmessagetext';
2852                                 $oldContent = $this->toEditContent( $oldtext );
2853                         } else {
2854                                 $oldContent = null;
2855                         }
2856                 } else {
2857                         $oldContent = $this->getCurrentContent();
2858                 }
2859
2860                 $textboxContent = $this->toEditContent( $this->textbox1 );
2861
2862                 $newContent = $this->mArticle->replaceSectionContent(
2863                                                         $this->section, $textboxContent,
2864                                                         $this->summary, $this->edittime );
2865
2866                 if ( $newContent ) {
2867                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2868                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2869
2870                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2871                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2872                 }
2873
2874                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2875                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2876                         $newtitle = wfMessage( 'yourtext' )->parse();
2877
2878                         if ( !$oldContent ) {
2879                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2880                         }
2881
2882                         if ( !$newContent ) {
2883                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2884                         }
2885
2886                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2887                         $de->setContent( $oldContent, $newContent );
2888
2889                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2890                         $de->showDiffStyle();
2891                 } else {
2892                         $difftext = '';
2893                 }
2894
2895                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2896         }
2897
2898         /**
2899          * Show the header copyright warning.
2900          */
2901         protected function showHeaderCopyrightWarning() {
2902                 $msg = 'editpage-head-copy-warn';
2903                 if ( !wfMessage( $msg )->isDisabled() ) {
2904                         global $wgOut;
2905                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2906                                 'editpage-head-copy-warn' );
2907                 }
2908         }
2909
2910         /**
2911          * Give a chance for site and per-namespace customizations of
2912          * terms of service summary link that might exist separately
2913          * from the copyright notice.
2914          *
2915          * This will display between the save button and the edit tools,
2916          * so should remain short!
2917          */
2918         protected function showTosSummary() {
2919                 $msg = 'editpage-tos-summary';
2920                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2921                 if ( !wfMessage( $msg )->isDisabled() ) {
2922                         global $wgOut;
2923                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2924                         $wgOut->addWikiMsg( $msg );
2925                         $wgOut->addHTML( '</div>' );
2926                 }
2927         }
2928
2929         protected function showEditTools() {
2930                 global $wgOut;
2931                 $wgOut->addHTML( '<div class="mw-editTools">' .
2932                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2933                         '</div>' );
2934         }
2935
2936         /**
2937          * Get the copyright warning
2938          *
2939          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2940          */
2941         protected function getCopywarn() {
2942                 return self::getCopyrightWarning( $this->mTitle );
2943         }
2944
2945         /**
2946          * Get the copyright warning, by default returns wikitext
2947          *
2948          * @param Title $title
2949          * @param string $format Output format, valid values are any function of a Message object
2950          * @return string
2951          */
2952         public static function getCopyrightWarning( $title, $format = 'plain' ) {
2953                 global $wgRightsText;
2954                 if ( $wgRightsText ) {
2955                         $copywarnMsg = array( 'copyrightwarning',
2956                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2957                                 $wgRightsText );
2958                 } else {
2959                         $copywarnMsg = array( 'copyrightwarning2',
2960                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2961                 }
2962                 // Allow for site and per-namespace customization of contribution/copyright notice.
2963                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2964
2965                 return "<div id=\"editpage-copywarn\">\n" .
2966                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
2967         }
2968
2969         /**
2970          * Get the Limit report for page previews
2971          *
2972          * @since 1.22
2973          * @param ParserOutput $output ParserOutput object from the parse
2974          * @return string HTML
2975          */
2976         public static function getPreviewLimitReport( $output ) {
2977                 if ( !$output || !$output->getLimitReportData() ) {
2978                         return '';
2979                 }
2980
2981                 wfProfileIn( __METHOD__ );
2982
2983                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
2984                         wfMessage( 'limitreport-title' )->parseAsBlock()
2985                 );
2986
2987                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
2988                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
2989
2990                 $limitReport .= Html::openElement( 'table', array(
2991                         'class' => 'preview-limit-report wikitable'
2992                 ) ) .
2993                         Html::openElement( 'tbody' );
2994
2995                 foreach ( $output->getLimitReportData() as $key => $value ) {
2996                         if ( wfRunHooks( 'ParserLimitReportFormat',
2997                                 array( $key, &$value, &$limitReport, true, true )
2998                         ) ) {
2999                                 $keyMsg = wfMessage( $key );
3000                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3001                                 if ( !$valueMsg->exists() ) {
3002                                         $valueMsg = new RawMessage( '$1' );
3003                                 }
3004                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3005                                         $limitReport .= Html::openElement( 'tr' ) .
3006                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3007                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3008                                                 Html::closeElement( 'tr' );
3009                                 }
3010                         }
3011                 }
3012
3013                 $limitReport .= Html::closeElement( 'tbody' ) .
3014                         Html::closeElement( 'table' ) .
3015                         Html::closeElement( 'div' );
3016
3017                 wfProfileOut( __METHOD__ );
3018
3019                 return $limitReport;
3020         }
3021
3022         protected function showStandardInputs( &$tabindex = 2 ) {
3023                 global $wgOut;
3024                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3025
3026                 if ( $this->section != 'new' ) {
3027                         $this->showSummaryInput( false, $this->summary );
3028                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3029                 }
3030
3031                 $checkboxes = $this->getCheckboxes( $tabindex,
3032                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3033                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3034
3035                 // Show copyright warning.
3036                 $wgOut->addWikiText( $this->getCopywarn() );
3037                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3038
3039                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3040                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3041
3042                 $cancel = $this->getCancelLink();
3043                 if ( $cancel !== '' ) {
3044                         $cancel .= Html::element( 'span',
3045                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3046                                 wfMessage( 'pipe-separator' )->text() );
3047                 }
3048                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
3049                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3050                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3051                         wfMessage( 'newwindow' )->parse();
3052                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3053                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3054                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3055                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3056                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3057         }
3058
3059         /**
3060          * Show an edit conflict. textbox1 is already shown in showEditForm().
3061          * If you want to use another entry point to this function, be careful.
3062          */
3063         protected function showConflict() {
3064                 global $wgOut;
3065
3066                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3067                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3068
3069                         $content1 = $this->toEditContent( $this->textbox1 );
3070                         $content2 = $this->toEditContent( $this->textbox2 );
3071
3072                         $handler = ContentHandler::getForModelID( $this->contentModel );
3073                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3074                         $de->setContent( $content2, $content1 );
3075                         $de->showDiff(
3076                                 wfMessage( 'yourtext' )->parse(),
3077                                 wfMessage( 'storedversion' )->text()
3078                         );
3079
3080                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3081                         $this->showTextbox2();
3082                 }
3083         }
3084
3085         /**
3086          * @return string
3087          */
3088         public function getCancelLink() {
3089                 $cancelParams = array();
3090                 if ( !$this->isConflict && $this->oldid > 0 ) {
3091                         $cancelParams['oldid'] = $this->oldid;
3092                 }
3093
3094                 return Linker::linkKnown(
3095                         $this->getContextTitle(),
3096                         wfMessage( 'cancel' )->parse(),
3097                         array( 'id' => 'mw-editform-cancel' ),
3098                         $cancelParams
3099                 );
3100         }
3101
3102         /**
3103          * Returns the URL to use in the form's action attribute.
3104          * This is used by EditPage subclasses when simply customizing the action
3105          * variable in the constructor is not enough. This can be used when the
3106          * EditPage lives inside of a Special page rather than a custom page action.
3107          *
3108          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3109          * @return string
3110          */
3111         protected function getActionURL( Title $title ) {
3112                 return $title->getLocalURL( array( 'action' => $this->action ) );
3113         }
3114
3115         /**
3116          * Check if a page was deleted while the user was editing it, before submit.
3117          * Note that we rely on the logging table, which hasn't been always there,
3118          * but that doesn't matter, because this only applies to brand new
3119          * deletes.
3120          * @return bool
3121          */
3122         protected function wasDeletedSinceLastEdit() {
3123                 if ( $this->deletedSinceEdit !== null ) {
3124                         return $this->deletedSinceEdit;
3125                 }
3126
3127                 $this->deletedSinceEdit = false;
3128
3129                 if ( $this->mTitle->isDeletedQuick() ) {
3130                         $this->lastDelete = $this->getLastDelete();
3131                         if ( $this->lastDelete ) {
3132                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3133                                 if ( $deleteTime > $this->starttime ) {
3134                                         $this->deletedSinceEdit = true;
3135                                 }
3136                         }
3137                 }
3138
3139                 return $this->deletedSinceEdit;
3140         }
3141
3142         protected function getLastDelete() {
3143                 $dbr = wfGetDB( DB_SLAVE );
3144                 $data = $dbr->selectRow(
3145                         array( 'logging', 'user' ),
3146                         array(
3147                                 'log_type',
3148                                 'log_action',
3149                                 'log_timestamp',
3150                                 'log_user',
3151                                 'log_namespace',
3152                                 'log_title',
3153                                 'log_comment',
3154                                 'log_params',
3155                                 'log_deleted',
3156                                 'user_name'
3157                         ), array(
3158                                 'log_namespace' => $this->mTitle->getNamespace(),
3159                                 'log_title' => $this->mTitle->getDBkey(),
3160                                 'log_type' => 'delete',
3161                                 'log_action' => 'delete',
3162                                 'user_id=log_user'
3163                         ),
3164                         __METHOD__,
3165                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3166                 );
3167                 // Quick paranoid permission checks...
3168                 if ( is_object( $data ) ) {
3169                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3170                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3171                         }
3172
3173                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3174                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3175                         }
3176                 }
3177                 return $data;
3178         }
3179
3180         /**
3181          * Get the rendered text for previewing.
3182          * @throws MWException
3183          * @return string
3184          */
3185         function getPreviewText() {
3186                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3187
3188                 wfProfileIn( __METHOD__ );
3189
3190                 if ( $wgRawHtml && !$this->mTokenOk ) {
3191                         // Could be an offsite preview attempt. This is very unsafe if
3192                         // HTML is enabled, as it could be an attack.
3193                         $parsedNote = '';
3194                         if ( $this->textbox1 !== '' ) {
3195                                 // Do not put big scary notice, if previewing the empty
3196                                 // string, which happens when you initially edit
3197                                 // a category page, due to automatic preview-on-open.
3198                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3199                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3200                         }
3201                         wfProfileOut( __METHOD__ );
3202                         return $parsedNote;
3203                 }
3204
3205                 $note = '';
3206
3207                 try {
3208                         $content = $this->toEditContent( $this->textbox1 );
3209
3210                         $previewHTML = '';
3211                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
3212                                 wfProfileOut( __METHOD__ );
3213                                 return $previewHTML;
3214                         }
3215
3216                         # provide a anchor link to the editform
3217                         $continueEditing = '<span class="mw-continue-editing">' .
3218                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3219                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3220                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3221                                 if ( $this->mTokenOkExceptSuffix ) {
3222                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3223
3224                                 } else {
3225                                         $note = wfMessage( 'session_fail_preview' )->plain();
3226                                 }
3227                         } elseif ( $this->incompleteForm ) {
3228                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3229                         } else {
3230                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3231                         }
3232
3233                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3234                         $parserOptions->setEditSection( false );
3235                         $parserOptions->setIsPreview( true );
3236                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3237
3238                         # don't parse non-wikitext pages, show message about preview
3239                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3240                                 if ( $this->mTitle->isCssJsSubpage() ) {
3241                                         $level = 'user';
3242                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3243                                         $level = 'site';
3244                                 } else {
3245                                         $level = false;
3246                                 }
3247
3248                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3249                                         $format = 'css';
3250                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3251                                         $format = 'js';
3252                                 } else {
3253                                         $format = false;
3254                                 }
3255
3256                                 # Used messages to make sure grep find them:
3257                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3258                                 if ( $level && $format ) {
3259                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3260                                                 wfMessage( "{$level}{$format}preview" )->text() .
3261                                                 ' ' . $continueEditing . "</div>";
3262                                 }
3263                         }
3264
3265                         # If we're adding a comment, we need to show the
3266                         # summary as the headline
3267                         if ( $this->section === "new" && $this->summary !== "" ) {
3268                                 $content = $content->addSectionHeader( $this->summary );
3269                         }
3270
3271                         $hook_args = array( $this, &$content );
3272                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3273                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3274
3275                         $parserOptions->enableLimitReport();
3276
3277                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3278                         # But it's now deprecated, so never mind
3279
3280                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3281                         $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3282
3283                         $previewHTML = $parserOutput->getText();
3284                         $this->mParserOutput = $parserOutput;
3285                         $wgOut->addParserOutputNoText( $parserOutput );
3286
3287                         if ( count( $parserOutput->getWarnings() ) ) {
3288                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3289                         }
3290                 } catch ( MWContentSerializationException $ex ) {
3291                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3292                         $note .= "\n\n" . $m->parse();
3293                         $previewHTML = '';
3294                 }
3295
3296                 if ( $this->isConflict ) {
3297                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3298                 } else {
3299                         $conflict = '<hr />';
3300                 }
3301
3302                 $previewhead = "<div class='previewnote'>\n" .
3303                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3304                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3305
3306                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3307                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3308                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3309                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3310
3311                 wfProfileOut( __METHOD__ );
3312                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3313         }
3314
3315         /**
3316          * @return array
3317          */
3318         function getTemplates() {
3319                 if ( $this->preview || $this->section != '' ) {
3320                         $templates = array();
3321                         if ( !isset( $this->mParserOutput ) ) {
3322                                 return $templates;
3323                         }
3324                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3325                                 foreach ( array_keys( $template ) as $dbk ) {
3326                                         $templates[] = Title::makeTitle( $ns, $dbk );
3327                                 }
3328                         }
3329                         return $templates;
3330                 } else {
3331                         return $this->mTitle->getTemplateLinksFrom();
3332                 }
3333         }
3334
3335         /**
3336          * Shows a bulletin board style toolbar for common editing functions.
3337          * It can be disabled in the user preferences.
3338          * The necessary JavaScript code can be found in skins/common/edit.js.
3339          *
3340          * @return string
3341          */
3342         static function getEditToolbar() {
3343                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3344                 global $wgEnableUploads, $wgForeignFileRepos;
3345
3346                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3347
3348                 /**
3349                  * $toolarray is an array of arrays each of which includes the
3350                  * filename of the button image (without path), the opening
3351                  * tag, the closing tag, optionally a sample text that is
3352                  * inserted between the two when no selection is highlighted
3353                  * and.  The tip text is shown when the user moves the mouse
3354                  * over the button.
3355                  *
3356                  * Also here: accesskeys (key), which are not used yet until
3357                  * someone can figure out a way to make them work in
3358                  * IE. However, we should make sure these keys are not defined
3359                  * on the edit page.
3360                  */
3361                 $toolarray = array(
3362                         array(
3363                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3364                                 'id'     => 'mw-editbutton-bold',
3365                                 'open'   => '\'\'\'',
3366                                 'close'  => '\'\'\'',
3367                                 'sample' => wfMessage( 'bold_sample' )->text(),
3368                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3369                                 'key'    => 'B'
3370                         ),
3371                         array(
3372                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3373                                 'id'     => 'mw-editbutton-italic',
3374                                 'open'   => '\'\'',
3375                                 'close'  => '\'\'',
3376                                 'sample' => wfMessage( 'italic_sample' )->text(),
3377                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3378                                 'key'    => 'I'
3379                         ),
3380                         array(
3381                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3382                                 'id'     => 'mw-editbutton-link',
3383                                 'open'   => '[[',
3384                                 'close'  => ']]',
3385                                 'sample' => wfMessage( 'link_sample' )->text(),
3386                                 'tip'    => wfMessage( 'link_tip' )->text(),
3387                                 'key'    => 'L'
3388                         ),
3389                         array(
3390                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3391                                 'id'     => 'mw-editbutton-extlink',
3392                                 'open'   => '[',
3393                                 'close'  => ']',
3394                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3395                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3396                                 'key'    => 'X'
3397                         ),
3398                         array(
3399                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3400                                 'id'     => 'mw-editbutton-headline',
3401                                 'open'   => "\n== ",
3402                                 'close'  => " ==\n",
3403                                 'sample' => wfMessage( 'headline_sample' )->text(),
3404                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3405                                 'key'    => 'H'
3406                         ),
3407                         $imagesAvailable ? array(
3408                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3409                                 'id'     => 'mw-editbutton-image',
3410                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3411                                 'close'  => ']]',
3412                                 'sample' => wfMessage( 'image_sample' )->text(),
3413                                 'tip'    => wfMessage( 'image_tip' )->text(),
3414                                 'key'    => 'D',
3415                         ) : false,
3416                         $imagesAvailable ? array(
3417                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3418                                 'id'     => 'mw-editbutton-media',
3419                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3420                                 'close'  => ']]',
3421                                 'sample' => wfMessage( 'media_sample' )->text(),
3422                                 'tip'    => wfMessage( 'media_tip' )->text(),
3423                                 'key'    => 'M'
3424                         ) : false,
3425                         array(
3426                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3427                                 'id'     => 'mw-editbutton-nowiki',
3428                                 'open'   => "<nowiki>",
3429                                 'close'  => "</nowiki>",
3430                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3431                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3432                                 'key'    => 'N'
3433                         ),
3434                         array(
3435                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3436                                 'id'     => 'mw-editbutton-signature',
3437                                 'open'   => '--~~~~',
3438                                 'close'  => '',
3439                                 'sample' => '',
3440                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3441                                 'key'    => 'Y'
3442                         ),
3443                         array(
3444                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3445                                 'id'     => 'mw-editbutton-hr',
3446                                 'open'   => "\n----\n",
3447                                 'close'  => '',
3448                                 'sample' => '',
3449                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3450                                 'key'    => 'R'
3451                         )
3452                 );
3453
3454                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3455                 foreach ( $toolarray as $tool ) {
3456                         if ( !$tool ) {
3457                                 continue;
3458                         }
3459
3460                         $params = array(
3461                                 $wgStylePath . '/common/images/' . $tool['image'],
3462                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3463                                 // Older browsers show a "speedtip" type message only for ALT.
3464                                 // Ideally these should be different, realistically they
3465                                 // probably don't need to be.
3466                                 $tool['tip'],
3467                                 $tool['open'],
3468                                 $tool['close'],
3469                                 $tool['sample'],
3470                                 $tool['id'],
3471                         );
3472
3473                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3474                 }
3475
3476                 // This used to be called on DOMReady from mediawiki.action.edit, which
3477                 // ended up causing race conditions with the setup code above.
3478                 $script .= "\n" .
3479                         "// Create button bar\n" .
3480                         "$(function() { mw.toolbar.init(); } );\n";
3481
3482                 $script .= '});';
3483                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3484
3485                 $toolbar = '<div id="toolbar"></div>';
3486
3487                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3488
3489                 return $toolbar;
3490         }
3491
3492         /**
3493          * Returns an array of html code of the following checkboxes:
3494          * minor and watch
3495          *
3496          * @param int $tabindex Current tabindex
3497          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3498          *                 status of the checkbox
3499          *
3500          * @return array
3501          */
3502         public function getCheckboxes( &$tabindex, $checked ) {
3503                 global $wgUser;
3504
3505                 $checkboxes = array();
3506
3507                 // don't show the minor edit checkbox if it's a new page or section
3508                 if ( !$this->isNew ) {
3509                         $checkboxes['minor'] = '';
3510                         $minorLabel = wfMessage( 'minoredit' )->parse();
3511                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3512                                 $attribs = array(
3513                                         'tabindex' => ++$tabindex,
3514                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3515                                         'id' => 'wpMinoredit',
3516                                 );
3517                                 $checkboxes['minor'] =
3518                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3519                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3520                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3521                                         ">{$minorLabel}</label>";
3522                         }
3523                 }
3524
3525                 $watchLabel = wfMessage( 'watchthis' )->parse();
3526                 $checkboxes['watch'] = '';
3527                 if ( $wgUser->isLoggedIn() ) {
3528                         $attribs = array(
3529                                 'tabindex' => ++$tabindex,
3530                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3531                                 'id' => 'wpWatchthis',
3532                         );
3533                         $checkboxes['watch'] =
3534                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3535                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3536                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3537                                 ">{$watchLabel}</label>";
3538                 }
3539                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3540                 return $checkboxes;
3541         }
3542
3543         /**
3544          * Returns an array of html code of the following buttons:
3545          * save, diff, preview and live
3546          *
3547          * @param int $tabindex Current tabindex
3548          *
3549          * @return array
3550          */
3551         public function getEditButtons( &$tabindex ) {
3552                 $buttons = array();
3553
3554                 $temp = array(
3555                         'id' => 'wpSave',
3556                         'name' => 'wpSave',
3557                         'type' => 'submit',
3558                         'tabindex' => ++$tabindex,
3559                         'value' => wfMessage( 'savearticle' )->text(),
3560                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3561                         'title' => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3562                 );
3563                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3564
3565                 ++$tabindex; // use the same for preview and live preview
3566                 $temp = array(
3567                         'id' => 'wpPreview',
3568                         'name' => 'wpPreview',
3569                         'type' => 'submit',
3570                         'tabindex' => $tabindex,
3571                         'value' => wfMessage( 'showpreview' )->text(),
3572                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3573                         'title' => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3574                 );
3575                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3576                 $buttons['live'] = '';
3577
3578                 $temp = array(
3579                         'id' => 'wpDiff',
3580                         'name' => 'wpDiff',
3581                         'type' => 'submit',
3582                         'tabindex' => ++$tabindex,
3583                         'value' => wfMessage( 'showdiff' )->text(),
3584                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3585                         'title' => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3586                 );
3587                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3588
3589                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3590                 return $buttons;
3591         }
3592
3593         /**
3594          * Output preview text only. This can be sucked into the edit page
3595          * via JavaScript, and saves the server time rendering the skin as
3596          * well as theoretically being more robust on the client (doesn't
3597          * disturb the edit box's undo history, won't eat your text on
3598          * failure, etc).
3599          *
3600          * @todo This doesn't include category or interlanguage links.
3601          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3602          *       or something...</s>" that might also require more skin
3603          *       initialization, so check whether that's a problem.
3604          */
3605         function livePreview() {
3606                 global $wgOut;
3607                 $wgOut->disable();
3608                 header( 'Content-type: text/xml; charset=utf-8' );
3609                 header( 'Cache-control: no-cache' );
3610
3611                 $previewText = $this->getPreviewText();
3612                 #$categories = $skin->getCategoryLinks();
3613
3614                 $s =
3615                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3616                 Xml::tags( 'livepreview', null,
3617                         Xml::element( 'preview', null, $previewText )
3618                         #.      Xml::element( 'category', null, $categories )
3619                 );
3620                 echo $s;
3621         }
3622
3623         /**
3624          * Call the stock "user is blocked" page
3625          *
3626          * @deprecated since 1.19; throw an exception directly instead
3627          */
3628         function blockedPage() {
3629                 wfDeprecated( __METHOD__, '1.19' );
3630                 global $wgUser;
3631
3632                 throw new UserBlockedError( $wgUser->getBlock() );
3633         }
3634
3635         /**
3636          * Produce the stock "please login to edit pages" page
3637          *
3638          * @deprecated since 1.19; throw an exception directly instead
3639          */
3640         function userNotLoggedInPage() {
3641                 wfDeprecated( __METHOD__, '1.19' );
3642                 throw new PermissionsError( 'edit' );
3643         }
3644
3645         /**
3646          * Show an error page saying to the user that he has insufficient permissions
3647          * to create a new page
3648          *
3649          * @deprecated since 1.19; throw an exception directly instead
3650          */
3651         function noCreatePermission() {
3652                 wfDeprecated( __METHOD__, '1.19' );
3653                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3654                 throw new PermissionsError( $permission );
3655         }
3656
3657         /**
3658          * Creates a basic error page which informs the user that
3659          * they have attempted to edit a nonexistent section.
3660          */
3661         function noSuchSectionPage() {
3662                 global $wgOut;
3663
3664                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3665
3666                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3667                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3668                 $wgOut->addHTML( $res );
3669
3670                 $wgOut->returnToMain( false, $this->mTitle );
3671         }
3672
3673         /**
3674          * Show "your edit contains spam" page with your diff and text
3675          *
3676          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3677          */
3678         public function spamPageWithContent( $match = false ) {
3679                 global $wgOut, $wgLang;
3680                 $this->textbox2 = $this->textbox1;
3681
3682                 if ( is_array( $match ) ) {
3683                         $match = $wgLang->listToText( $match );
3684                 }
3685                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3686
3687                 $wgOut->addHTML( '<div id="spamprotected">' );
3688                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3689                 if ( $match ) {
3690                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3691                 }
3692                 $wgOut->addHTML( '</div>' );
3693
3694                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3695                 $this->showDiff();
3696
3697                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3698                 $this->showTextbox2();
3699
3700                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3701         }
3702
3703         /**
3704          * Check if the browser is on a blacklist of user-agents known to
3705          * mangle UTF-8 data on form submission. Returns true if Unicode
3706          * should make it through, false if it's known to be a problem.
3707          * @return bool
3708          */
3709         private function checkUnicodeCompliantBrowser() {
3710                 global $wgBrowserBlackList, $wgRequest;
3711
3712                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3713                 if ( $currentbrowser === false ) {
3714                         // No User-Agent header sent? Trust it by default...
3715                         return true;
3716                 }
3717
3718                 foreach ( $wgBrowserBlackList as $browser ) {
3719                         if ( preg_match( $browser, $currentbrowser ) ) {
3720                                 return false;
3721                         }
3722                 }
3723                 return true;
3724         }
3725
3726         /**
3727          * Filter an input field through a Unicode de-armoring process if it
3728          * came from an old browser with known broken Unicode editing issues.
3729          *
3730          * @param WebRequest $request
3731          * @param string $field
3732          * @return string
3733          */
3734         protected function safeUnicodeInput( $request, $field ) {
3735                 $text = rtrim( $request->getText( $field ) );
3736                 return $request->getBool( 'safemode' )
3737                         ? $this->unmakeSafe( $text )
3738                         : $text;
3739         }
3740
3741         /**
3742          * Filter an output field through a Unicode armoring process if it is
3743          * going to an old browser with known broken Unicode editing issues.
3744          *
3745          * @param string $text
3746          * @return string
3747          */
3748         protected function safeUnicodeOutput( $text ) {
3749                 global $wgContLang;
3750                 $codedText = $wgContLang->recodeForEdit( $text );
3751                 return $this->checkUnicodeCompliantBrowser()
3752                         ? $codedText
3753                         : $this->makeSafe( $codedText );
3754         }
3755
3756         /**
3757          * A number of web browsers are known to corrupt non-ASCII characters
3758          * in a UTF-8 text editing environment. To protect against this,
3759          * detected browsers will be served an armored version of the text,
3760          * with non-ASCII chars converted to numeric HTML character references.
3761          *
3762          * Preexisting such character references will have a 0 added to them
3763          * to ensure that round-trips do not alter the original data.
3764          *
3765          * @param string $invalue
3766          * @return string
3767          */
3768         private function makeSafe( $invalue ) {
3769                 // Armor existing references for reversibility.
3770                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3771
3772                 $bytesleft = 0;
3773                 $result = "";
3774                 $working = 0;
3775                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3776                         $bytevalue = ord( $invalue[$i] );
3777                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3778                                 $result .= chr( $bytevalue );
3779                                 $bytesleft = 0;
3780                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3781                                 $working = $working << 6;
3782                                 $working += ( $bytevalue & 0x3F );
3783                                 $bytesleft--;
3784                                 if ( $bytesleft <= 0 ) {
3785                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3786                                 }
3787                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3788                                 $working = $bytevalue & 0x1F;
3789                                 $bytesleft = 1;
3790                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3791                                 $working = $bytevalue & 0x0F;
3792                                 $bytesleft = 2;
3793                         } else { // 1111 0xxx
3794                                 $working = $bytevalue & 0x07;
3795                                 $bytesleft = 3;
3796                         }
3797                 }
3798                 return $result;
3799         }
3800
3801         /**
3802          * Reverse the previously applied transliteration of non-ASCII characters
3803          * back to UTF-8. Used to protect data from corruption by broken web browsers
3804          * as listed in $wgBrowserBlackList.
3805          *
3806          * @param string $invalue
3807          * @return string
3808          */
3809         private function unmakeSafe( $invalue ) {
3810                 $result = "";
3811                 $valueLength = strlen( $invalue );
3812                 for ( $i = 0; $i < $valueLength; $i++ ) {
3813                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3814                                 $i += 3;
3815                                 $hexstring = "";
3816                                 do {
3817                                         $hexstring .= $invalue[$i];
3818                                         $i++;
3819                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3820
3821                                 // Do some sanity checks. These aren't needed for reversibility,
3822                                 // but should help keep the breakage down if the editor
3823                                 // breaks one of the entities whilst editing.
3824                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3825                                         $codepoint = hexdec( $hexstring );
3826                                         $result .= codepointToUtf8( $codepoint );
3827                                 } else {
3828                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3829                                 }
3830                         } else {
3831                                 $result .= substr( $invalue, $i, 1 );
3832                         }
3833                 }
3834                 // reverse the transform that we made for reversibility reasons.
3835                 return strtr( $result, array( "&#x0" => "&#x" ) );
3836         }
3837 }