includes/EditPage.php

   1 <?php
   2 /**
   3  * Page edition user interface.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39
  40         /**
  41          * Status: Article successfully updated
  42          */
  43         const AS_SUCCESS_UPDATE = 200;
  44
  45         /**
  46          * Status: Article successfully created
  47          */
  48         const AS_SUCCESS_NEW_ARTICLE = 201;
  49
  50         /**
  51          * Status: Article update aborted by a hook function
  52          */
  53         const AS_HOOK_ERROR = 210;
  54
  55         /**
  56          * Status: A hook function returned an error
  57          */
  58         const AS_HOOK_ERROR_EXPECTED = 212;
  59
  60         /**
  61          * Status: User is blocked from editing this page
  62          */
  63         const AS_BLOCKED_PAGE_FOR_USER = 215;
  64
  65         /**
  66          * Status: Content too big (> $wgMaxArticleSize)
  67          */
  68         const AS_CONTENT_TOO_BIG = 216;
  69
  70         /**
  71          * Status: User cannot edit? (not used)
  72          */
  73         const AS_USER_CANNOT_EDIT = 217;
  74
  75         /**
  76          * Status: this anonymous user is not allowed to edit this page
  77          */
  78         const AS_READ_ONLY_PAGE_ANON = 218;
  79
  80         /**
  81          * Status: this logged in user is not allowed to edit this page
  82          */
  83         const AS_READ_ONLY_PAGE_LOGGED = 219;
  84
  85         /**
  86          * Status: wiki is in readonly mode (wfReadOnly() == true)
  87          */
  88         const AS_READ_ONLY_PAGE = 220;
  89
  90         /**
  91          * Status: rate limiter for action 'edit' was tripped
  92          */
  93         const AS_RATE_LIMITED = 221;
  94
  95         /**
  96          * Status: article was deleted while editing and param wpRecreate == false or form
  97          * was not posted
  98          */
  99         const AS_ARTICLE_WAS_DELETED = 222;
 100
 101         /**
 102          * Status: user tried to create this page, but is not allowed to do that
 103          * ( Title->userCan('create') == false )
 104          */
 105         const AS_NO_CREATE_PERMISSION = 223;
 106
 107         /**
 108          * Status: user tried to create a blank page
 109          */
 110         const AS_BLANK_ARTICLE = 224;
 111
 112         /**
 113          * Status: (non-resolvable) edit conflict
 114          */
 115         const AS_CONFLICT_DETECTED = 225;
 116
 117         /**
 118          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 119          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 120          */
 121         const AS_SUMMARY_NEEDED = 226;
 122
 123         /**
 124          * Status: user tried to create a new section without content
 125          */
 126         const AS_TEXTBOX_EMPTY = 228;
 127
 128         /**
 129          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 130          */
 131         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 132
 133         /**
 134          * not used
 135          */
 136         const AS_OK = 230;
 137
 138         /**
 139          * Status: WikiPage::doEdit() was unsuccessful
 140          */
 141         const AS_END = 231;
 142
 143         /**
 144          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 145          */
 146         const AS_SPAM_ERROR = 232;
 147
 148         /**
 149          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 150          */
 151         const AS_IMAGE_REDIRECT_ANON = 233;
 152
 153         /**
 154          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 155          */
 156         const AS_IMAGE_REDIRECT_LOGGED = 234;
 157
 158         /**
 159          * Status: can't parse content
 160          */
 161         const AS_PARSE_ERROR = 240;
 162
 163         /**
 164          * HTML id and name for the beginning of the edit form.
 165          */
 166         const EDITFORM_ID = 'editform';
 167
 168         /**
 169          * Prefix of key for cookie used to pass post-edit state.
 170          * The revision id edited is added after this
 171          */
 172         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 173
 174         /**
 175          * Duration of PostEdit cookie, in seconds.
 176          * The cookie will be removed instantly if the JavaScript runs.
 177          *
 178          * Otherwise, though, we don't want the cookies to accumulate.
 179          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible limit of only 20 cookies per domain.
 180          * This still applies at least to some versions of IE without full updates:
 181          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 182          *
 183          * A value of 20 minutes should be enough to take into account slow loads and minor
 184          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 185          */
 186         const POST_EDIT_COOKIE_DURATION = 1200;
 187
 188         /**
 189          * @var Article
 190          */
 191         var $mArticle;
 192
 193         /**
 194          * @var Title
 195          */
 196         var $mTitle;
 197         private $mContextTitle = null;
 198         var $action = 'submit';
 199         var $isConflict = false;
 200         var $isCssJsSubpage = false;
 201         var $isCssSubpage = false;
 202         var $isJsSubpage = false;
 203         var $isWrongCaseCssJsPage = false;
 204         var $isNew = false; // new page or new section
 205         var $deletedSinceEdit;
 206         var $formtype;
 207         var $firsttime;
 208         var $lastDelete;
 209         var $mTokenOk = false;
 210         var $mTokenOkExceptSuffix = false;
 211         var $mTriedSave = false;
 212         var $incompleteForm = false;
 213         var $tooBig = false;
 214         var $kblength = false;
 215         var $missingComment = false;
 216         var $missingSummary = false;
 217         var $allowBlankSummary = false;
 218         var $autoSumm = '';
 219         var $hookError = '';
 220         #var $mPreviewTemplates;
 221
 222         /**
 223          * @var ParserOutput
 224          */
 225         var $mParserOutput;
 226
 227         /**
 228          * Has a summary been preset using GET parameter &summary= ?
 229          * @var Bool
 230          */
 231         var $hasPresetSummary = false;
 232
 233         var $mBaseRevision = false;
 234         var $mShowSummaryField = true;
 235
 236         # Form values
 237         var $save = false, $preview = false, $diff = false;
 238         var $minoredit = false, $watchthis = false, $recreate = false;
 239         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 240         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 241         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 242         var $contentModel = null, $contentFormat = null;
 243
 244         # Placeholders for text injection by hooks (must be HTML)
 245         # extensions should take care to _append_ to the present value
 246         public $editFormPageTop = ''; // Before even the preview
 247         public $editFormTextTop = '';
 248         public $editFormTextBeforeContent = '';
 249         public $editFormTextAfterWarn = '';
 250         public $editFormTextAfterTools = '';
 251         public $editFormTextBottom = '';
 252         public $editFormTextAfterContent = '';
 253         public $previewTextAfterContent = '';
 254         public $mPreloadContent = null;
 255
 256         /* $didSave should be set to true whenever an article was successfully altered. */
 257         public $didSave = false;
 258         public $undidRev = 0;
 259
 260         public $suppressIntro = false;
 261
 262         /**
 263          * Set to true to allow editing of non-text content types.
 264          *
 265          * @var bool
 266          */
 267         public $allowNonTextContent = false;
 268
 269         /**
 270          * @param $article Article
 271          */
 272         public function __construct( Article $article ) {
 273                 $this->mArticle = $article;
 274                 $this->mTitle = $article->getTitle();
 275
 276                 $this->contentModel = $this->mTitle->getContentModel();
 277
 278                 $handler = ContentHandler::getForModelID( $this->contentModel );
 279                 $this->contentFormat = $handler->getDefaultFormat();
 280         }
 281
 282         /**
 283          * @return Article
 284          */
 285         public function getArticle() {
 286                 return $this->mArticle;
 287         }
 288
 289         /**
 290          * @since 1.19
 291          * @return Title
 292          */
 293         public function getTitle() {
 294                 return $this->mTitle;
 295         }
 296
 297         /**
 298          * Set the context Title object
 299          *
 300          * @param $title Title object or null
 301          */
 302         public function setContextTitle( $title ) {
 303                 $this->mContextTitle = $title;
 304         }
 305
 306         /**
 307          * Get the context title object.
 308          * If not set, $wgTitle will be returned. This behavior might change in
 309          * the future to return $this->mTitle instead.
 310          *
 311          * @return Title object
 312          */
 313         public function getContextTitle() {
 314                 if ( is_null( $this->mContextTitle ) ) {
 315                         global $wgTitle;
 316                         return $wgTitle;
 317                 } else {
 318                         return $this->mContextTitle;
 319                 }
 320         }
 321
 322         function submit() {
 323                 $this->edit();
 324         }
 325
 326         /**
 327          * This is the function that gets called for "action=edit". It
 328          * sets up various member variables, then passes execution to
 329          * another function, usually showEditForm()
 330          *
 331          * The edit form is self-submitting, so that when things like
 332          * preview and edit conflicts occur, we get the same form back
 333          * with the extra stuff added.  Only when the final submission
 334          * is made and all is well do we actually save and redirect to
 335          * the newly-edited page.
 336          */
 337         function edit() {
 338                 global $wgOut, $wgRequest, $wgUser;
 339                 // Allow extensions to modify/prevent this form or submission
 340                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 341                         return;
 342                 }
 343
 344                 wfProfileIn( __METHOD__ );
 345                 wfDebug( __METHOD__ . ": enter\n" );
 346
 347                 // If they used redlink=1 and the page exists, redirect to the main article
 348                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 349                         $wgOut->redirect( $this->mTitle->getFullURL() );
 350                         wfProfileOut( __METHOD__ );
 351                         return;
 352                 }
 353
 354                 $this->importFormData( $wgRequest );
 355                 $this->firsttime = false;
 356
 357                 if ( $this->live ) {
 358                         $this->livePreview();
 359                         wfProfileOut( __METHOD__ );
 360                         return;
 361                 }
 362
 363                 if ( wfReadOnly() && $this->save ) {
 364                         // Force preview
 365                         $this->save = false;
 366                         $this->preview = true;
 367                 }
 368
 369                 if ( $this->save ) {
 370                         $this->formtype = 'save';
 371                 } elseif ( $this->preview ) {
 372                         $this->formtype = 'preview';
 373                 } elseif ( $this->diff ) {
 374                         $this->formtype = 'diff';
 375                 } else { # First time through
 376                         $this->firsttime = true;
 377                         if ( $this->previewOnOpen() ) {
 378                                 $this->formtype = 'preview';
 379                         } else {
 380                                 $this->formtype = 'initial';
 381                         }
 382                 }
 383
 384                 $permErrors = $this->getEditPermissionErrors();
 385                 if ( $permErrors ) {
 386                         wfDebug( __METHOD__ . ": User can't edit\n" );
 387                         // Auto-block user's IP if the account was "hard" blocked
 388                         $wgUser->spreadAnyEditBlock();
 389
 390                         $this->displayPermissionsError( $permErrors );
 391
 392                         wfProfileOut( __METHOD__ );
 393                         return;
 394                 }
 395
 396                 wfProfileIn( __METHOD__ . "-business-end" );
 397
 398                 $this->isConflict = false;
 399                 // css / js subpages of user pages get a special treatment
 400                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 401                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 402                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 403                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 404
 405                 # Show applicable editing introductions
 406                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 407                         $this->showIntro();
 408                 }
 409
 410                 # Attempt submission here.  This will check for edit conflicts,
 411                 # and redundantly check for locked database, blocked IPs, etc.
 412                 # that edit() already checked just in case someone tries to sneak
 413                 # in the back door with a hand-edited submission URL.
 414
 415                 if ( 'save' == $this->formtype ) {
 416                         if ( !$this->attemptSave() ) {
 417                                 wfProfileOut( __METHOD__ . "-business-end" );
 418                                 wfProfileOut( __METHOD__ );
 419                                 return;
 420                         }
 421                 }
 422
 423                 # First time through: get contents, set time for conflict
 424                 # checking, etc.
 425                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 426                         if ( $this->initialiseForm() === false ) {
 427                                 $this->noSuchSectionPage();
 428                                 wfProfileOut( __METHOD__ . "-business-end" );
 429                                 wfProfileOut( __METHOD__ );
 430                                 return;
 431                         }
 432
 433                         if ( !$this->mTitle->getArticleID() ) {
 434                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 435                         } else {
 436                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 437                         }
 438
 439                 }
 440
 441                 $this->showEditForm();
 442                 wfProfileOut( __METHOD__ . "-business-end" );
 443                 wfProfileOut( __METHOD__ );
 444         }
 445
 446         /**
 447          * @return array
 448          */
 449         protected function getEditPermissionErrors() {
 450                 global $wgUser;
 451                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 452                 # Can this title be created?
 453                 if ( !$this->mTitle->exists() ) {
 454                         $permErrors = array_merge( $permErrors,
 455                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 456                 }
 457                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 458                 $remove = array();
 459                 foreach ( $permErrors as $error ) {
 460                         if ( ( $this->preview || $this->diff )
 461                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 462                         ) {
 463                                 $remove[] = $error;
 464                         }
 465                 }
 466                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 467                 return $permErrors;
 468         }
 469
 470         /**
 471          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 472          * but with the following differences:
 473          * - If redlink=1, the user will be redirected to the page
 474          * - If there is content to display or the error occurs while either saving,
 475          *   previewing or showing the difference, it will be a
 476          *   "View source for ..." page displaying the source code after the error message.
 477          *
 478          * @since 1.19
 479          * @param array $permErrors of permissions errors, as returned by
 480          *                    Title::getUserPermissionsErrors().
 481          * @throws PermissionsError
 482          */
 483         protected function displayPermissionsError( array $permErrors ) {
 484                 global $wgRequest, $wgOut;
 485
 486                 if ( $wgRequest->getBool( 'redlink' ) ) {
 487                         // The edit page was reached via a red link.
 488                         // Redirect to the article page and let them click the edit tab if
 489                         // they really want a permission error.
 490                         $wgOut->redirect( $this->mTitle->getFullURL() );
 491                         return;
 492                 }
 493
 494                 $content = $this->getContentObject();
 495
 496                 # Use the normal message if there's nothing to display
 497                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 498                         $action = $this->mTitle->exists() ? 'edit' :
 499                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 500                         throw new PermissionsError( $action, $permErrors );
 501                 }
 502
 503                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 504                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 505                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 506                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 507                 $wgOut->addHTML( "<hr />\n" );
 508
 509                 # If the user made changes, preserve them when showing the markup
 510                 # (This happens when a user is blocked during edit, for instance)
 511                 if ( !$this->firsttime ) {
 512                         $text = $this->textbox1;
 513                         $wgOut->addWikiMsg( 'viewyourtext' );
 514                 } else {
 515                         $text = $this->toEditText( $content );
 516                         $wgOut->addWikiMsg( 'viewsourcetext' );
 517                 }
 518
 519                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 520
 521                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 522                         Linker::formatTemplates( $this->getTemplates() ) ) );
 523
 524                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 525
 526                 if ( $this->mTitle->exists() ) {
 527                         $wgOut->returnToMain( null, $this->mTitle );
 528                 }
 529         }
 530
 531         /**
 532          * Show a read-only error
 533          * Parameters are the same as OutputPage:readOnlyPage()
 534          * Redirect to the article page if redlink=1
 535          * @deprecated in 1.19; use displayPermissionsError() instead
 536          */
 537         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 538                 wfDeprecated( __METHOD__, '1.19' );
 539
 540                 global $wgRequest, $wgOut;
 541                 if ( $wgRequest->getBool( 'redlink' ) ) {
 542                         // The edit page was reached via a red link.
 543                         // Redirect to the article page and let them click the edit tab if
 544                         // they really want a permission error.
 545                         $wgOut->redirect( $this->mTitle->getFullURL() );
 546                 } else {
 547                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 548                 }
 549         }
 550
 551         /**
 552          * Should we show a preview when the edit form is first shown?
 553          *
 554          * @return bool
 555          */
 556         protected function previewOnOpen() {
 557                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 558                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 559                         // Explicit override from request
 560                         return true;
 561                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 562                         // Explicit override from request
 563                         return false;
 564                 } elseif ( $this->section == 'new' ) {
 565                         // Nothing *to* preview for new sections
 566                         return false;
 567                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 568                         // Standard preference behavior
 569                         return true;
 570                 } elseif ( !$this->mTitle->exists()
 571                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 572                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 573                 ) {
 574                         // Categories are special
 575                         return true;
 576                 } else {
 577                         return false;
 578                 }
 579         }
 580
 581         /**
 582          * Checks whether the user entered a skin name in uppercase,
 583          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 584          *
 585          * @return bool
 586          */
 587         protected function isWrongCaseCssJsPage() {
 588                 if ( $this->mTitle->isCssJsSubpage() ) {
 589                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 590                         $skins = array_merge(
 591                                 array_keys( Skin::getSkinNames() ),
 592                                 array( 'common' )
 593                         );
 594                         return !in_array( $name, $skins )
 595                                 && in_array( strtolower( $name ), $skins );
 596                 } else {
 597                         return false;
 598                 }
 599         }
 600
 601         /**
 602          * Returns whether section editing is supported for the current page.
 603          * Subclasses may override this to replace the default behavior, which is
 604          * to check ContentHandler::supportsSections.
 605          *
 606          * @return bool true if this edit page supports sections, false otherwise.
 607          */
 608         protected function isSectionEditSupported() {
 609                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 610                 return $contentHandler->supportsSections();
 611         }
 612
 613         /**
 614          * This function collects the form data and uses it to populate various member variables.
 615          * @param $request WebRequest
 616          */
 617         function importFormData( &$request ) {
 618                 global $wgContLang, $wgUser;
 619
 620                 wfProfileIn( __METHOD__ );
 621
 622                 # Section edit can come from either the form or a link
 623                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 624
 625                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 626                         wfProfileOut( __METHOD__ );
 627                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 628                 }
 629
 630                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 631
 632                 if ( $request->wasPosted() ) {
 633                         # These fields need to be checked for encoding.
 634                         # Also remove trailing whitespace, but don't remove _initial_
 635                         # whitespace from the text boxes. This may be significant formatting.
 636                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 637                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 638                                 // Skip this if wpTextbox2 has input, it indicates that we came
 639                                 // from a conflict page with raw page text, not a custom form
 640                                 // modified by subclasses
 641                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 642                                 $textbox1 = $this->importContentFormData( $request );
 643                                 if ( $textbox1 !== null ) {
 644                                         $this->textbox1 = $textbox1;
 645                                 }
 646
 647                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 648                         }
 649
 650                         # Truncate for whole multibyte characters
 651                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 652
 653                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 654                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 655                         # section titles.
 656                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 657
 658                         # Treat sectiontitle the same way as summary.
 659                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 660                         # currently doing double duty as both edit summary and section title. Right now this
 661                         # is just to allow API edits to work around this limitation, but this should be
 662                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 663                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 664                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 665
 666                         $this->edittime = $request->getVal( 'wpEdittime' );
 667                         $this->starttime = $request->getVal( 'wpStarttime' );
 668
 669                         $undidRev = $request->getInt( 'wpUndidRevision' );
 670                         if ( $undidRev ) {
 671                                 $this->undidRev = $undidRev;
 672                         }
 673
 674                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 675
 676                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 677                                 // wpTextbox1 field is missing, possibly due to being "too big"
 678                                 // according to some filter rules such as Suhosin's setting for
 679                                 // suhosin.request.max_value_length (d'oh)
 680                                 $this->incompleteForm = true;
 681                         } else {
 682                                 // edittime should be one of our last fields; if it's missing,
 683                                 // the submission probably broke somewhere in the middle.
 684                                 $this->incompleteForm = is_null( $this->edittime );
 685                         }
 686                         if ( $this->incompleteForm ) {
 687                                 # If the form is incomplete, force to preview.
 688                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 689                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 690                                 $this->preview = true;
 691                         } else {
 692                                 /* Fallback for live preview */
 693                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 694                                 $this->diff = $request->getCheck( 'wpDiff' );
 695
 696                                 // Remember whether a save was requested, so we can indicate
 697                                 // if we forced preview due to session failure.
 698                                 $this->mTriedSave = !$this->preview;
 699
 700                                 if ( $this->tokenOk( $request ) ) {
 701                                         # Some browsers will not report any submit button
 702                                         # if the user hits enter in the comment box.
 703                                         # The unmarked state will be assumed to be a save,
 704                                         # if the form seems otherwise complete.
 705                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 706                                 } elseif ( $this->diff ) {
 707                                         # Failed token check, but only requested "Show Changes".
 708                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 709                                 } else {
 710                                         # Page might be a hack attempt posted from
 711                                         # an external site. Preview instead of saving.
 712                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 713                                         $this->preview = true;
 714                                 }
 715                         }
 716                         $this->save = !$this->preview && !$this->diff;
 717                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 718                                 $this->edittime = null;
 719                         }
 720
 721                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 722                                 $this->starttime = null;
 723                         }
 724
 725                         $this->recreate = $request->getCheck( 'wpRecreate' );
 726
 727                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 728                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 729
 730                         # Don't force edit summaries when a user is editing their own user or talk page
 731                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 732                                 && $this->mTitle->getText() == $wgUser->getName()
 733                         ) {
 734                                 $this->allowBlankSummary = true;
 735                         } else {
 736                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 737                         }
 738
 739                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 740                 } else {
 741                         # Not a posted form? Start with nothing.
 742                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 743                         $this->textbox1 = '';
 744                         $this->summary = '';
 745                         $this->sectiontitle = '';
 746                         $this->edittime = '';
 747                         $this->starttime = wfTimestampNow();
 748                         $this->edit = false;
 749                         $this->preview = false;
 750                         $this->save = false;
 751                         $this->diff = false;
 752                         $this->minoredit = false;
 753                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overridden by request parameters
 754                         $this->recreate = false;
 755
 756                         // When creating a new section, we can preload a section title by passing it as the
 757                         // preloadtitle parameter in the URL (Bug 13100)
 758                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 759                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 760                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 761                                 $this->summary = $request->getVal( 'preloadtitle' );
 762                         }
 763                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 764                                 $this->summary = $request->getText( 'summary' );
 765                                 if ( $this->summary !== '' ) {
 766                                         $this->hasPresetSummary = true;
 767                                 }
 768                         }
 769
 770                         if ( $request->getVal( 'minor' ) ) {
 771                                 $this->minoredit = true;
 772                         }
 773                 }
 774
 775                 $this->oldid = $request->getInt( 'oldid' );
 776
 777                 $this->bot = $request->getBool( 'bot', true );
 778                 $this->nosummary = $request->getBool( 'nosummary' );
 779
 780                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 781                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 782                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 783
 784                 #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
 785                 #TODO: check if the desired content model supports the given content format!
 786
 787                 $this->live = $request->getCheck( 'live' );
 788                 $this->editintro = $request->getText( 'editintro',
 789                         // Custom edit intro for new sections
 790                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 791
 792                 // Allow extensions to modify form data
 793                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 794
 795                 wfProfileOut( __METHOD__ );
 796         }
 797
 798         /**
 799          * Subpage overridable method for extracting the page content data from the
 800          * posted form to be placed in $this->textbox1, if using customized input
 801          * this method should be overridden and return the page text that will be used
 802          * for saving, preview parsing and so on...
 803          *
 804          * @param $request WebRequest
 805          */
 806         protected function importContentFormData( &$request ) {
 807                 return; // Don't do anything, EditPage already extracted wpTextbox1
 808         }
 809
 810         /**
 811          * Initialise form fields in the object
 812          * Called on the first invocation, e.g. when a user clicks an edit link
 813          * @return bool -- if the requested section is valid
 814          */
 815         function initialiseForm() {
 816                 global $wgUser;
 817                 $this->edittime = $this->mArticle->getTimestamp();
 818
 819                 $content = $this->getContentObject( false ); #TODO: track content object?!
 820                 if ( $content === false ) {
 821                         return false;
 822                 }
 823                 $this->textbox1 = $this->toEditText( $content );
 824
 825                 // activate checkboxes if user wants them to be always active
 826                 # Sort out the "watch" checkbox
 827                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 828                         # Watch all edits
 829                         $this->watchthis = true;
 830                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 831                         # Watch creations
 832                         $this->watchthis = true;
 833                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 834                         # Already watched
 835                         $this->watchthis = true;
 836                 }
 837                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 838                         $this->minoredit = true;
 839                 }
 840                 if ( $this->textbox1 === false ) {
 841                         return false;
 842                 }
 843                 return true;
 844         }
 845
 846         /**
 847          * Fetch initial editing page content.
 848          *
 849          * @param $def_text string|bool
 850          * @return mixed string on success, $def_text for invalid sections
 851          * @private
 852          * @deprecated since 1.21, get WikiPage::getContent() instead.
 853          */
 854         function getContent( $def_text = false ) {
 855                 ContentHandler::deprecated( __METHOD__, '1.21' );
 856
 857                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 858                         $def_content = $this->toEditContent( $def_text );
 859                 } else {
 860                         $def_content = false;
 861                 }
 862
 863                 $content = $this->getContentObject( $def_content );
 864
 865                 // Note: EditPage should only be used with text based content anyway.
 866                 return $this->toEditText( $content );
 867         }
 868
 869         /**
 870          * @param Content|null $def_content The default value to return
 871          *
 872          * @return mixed Content on success, $def_content for invalid sections
 873          *
 874          * @since 1.21
 875          */
 876         protected function getContentObject( $def_content = null ) {
 877                 global $wgOut, $wgRequest;
 878
 879                 wfProfileIn( __METHOD__ );
 880
 881                 $content = false;
 882
 883                 // For message page not locally set, use the i18n message.
 884                 // For other non-existent articles, use preload text if any.
 885                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 886                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 887                                 # If this is a system message, get the default text.
 888                                 $msg = $this->mTitle->getDefaultMessageText();
 889
 890                                 $content = $this->toEditContent( $msg );
 891                         }
 892                         if ( $content === false ) {
 893                                 # If requested, preload some text.
 894                                 $preload = $wgRequest->getVal( 'preload',
 895                                         // Custom preload text for new sections
 896                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 897
 898                                 $content = $this->getPreloadedContent( $preload );
 899                         }
 900                 // For existing pages, get text based on "undo" or section parameters.
 901                 } else {
 902                         if ( $this->section != '' ) {
 903                                 // Get section edit text (returns $def_text for invalid sections)
 904                                 $orig = $this->getOriginalContent();
 905                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 906
 907                                 if ( !$content ) {
 908                                         $content = $def_content;
 909                                 }
 910                         } else {
 911                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 912                                 $undo = $wgRequest->getInt( 'undo' );
 913
 914                                 if ( $undo > 0 && $undoafter > 0 ) {
 915                                         if ( $undo < $undoafter ) {
 916                                                 # If they got undoafter and undo round the wrong way, switch them
 917                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 918                                         }
 919
 920                                         $undorev = Revision::newFromId( $undo );
 921                                         $oldrev = Revision::newFromId( $undoafter );
 922
 923                                         # Sanity check, make sure it's the right page,
 924                                         # the revisions exist and they were not deleted.
 925                                         # Otherwise, $content will be left as-is.
 926                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 927                                                 $undorev->getPage() == $oldrev->getPage() &&
 928                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 929                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 930                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 931
 932                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 933
 934                                                 if ( $content === false ) {
 935                                                         # Warn the user that something went wrong
 936                                                         $undoMsg = 'failure';
 937                                                 } else {
 938                                                         # Inform the user of our success and set an automatic edit summary
 939                                                         $undoMsg = 'success';
 940
 941                                                         # If we just undid one rev, use an autosummary
 942                                                         $firstrev = $oldrev->getNext();
 943                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 944                                                                 $userText = $undorev->getUserText();
 945                                                                 if ( $userText === '' ) {
 946                                                                         $undoSummary = wfMessage(
 947                                                                                 'undo-summary-username-hidden',
 948                                                                                 $undo
 949                                                                         )->inContentLanguage()->text();
 950                                                                 } else {
 951                                                                         $undoSummary = wfMessage(
 952                                                                                 'undo-summary',
 953                                                                                 $undo,
 954                                                                                 $userText
 955                                                                         )->inContentLanguage()->text();
 956                                                                 }
 957                                                                 if ( $this->summary === '' ) {
 958                                                                         $this->summary = $undoSummary;
 959                                                                 } else {
 960                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 961                                                                                 ->inContentLanguage()->text() . $this->summary;
 962                                                                 }
 963                                                                 $this->undidRev = $undo;
 964                                                         }
 965                                                         $this->formtype = 'diff';
 966                                                 }
 967                                         } else {
 968                                                 // Failed basic sanity checks.
 969                                                 // Older revisions may have been removed since the link
 970                                                 // was created, or we may simply have got bogus input.
 971                                                 $undoMsg = 'norev';
 972                                         }
 973
 974                                         // Messages: undo-success, undo-failure, undo-norev
 975                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 976                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 977                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 978                                 }
 979
 980                                 if ( $content === false ) {
 981                                         $content = $this->getOriginalContent();
 982                                 }
 983                         }
 984                 }
 985
 986                 wfProfileOut( __METHOD__ );
 987                 return $content;
 988         }
 989
 990         /**
 991          * Get the content of the wanted revision, without section extraction.
 992          *
 993          * The result of this function can be used to compare user's input with
 994          * section replaced in its context (using WikiPage::replaceSection())
 995          * to the original text of the edit.
 996          *
 997          * This differs from Article::getContent() that when a missing revision is
 998          * encountered the result will be null and not the
 999          * 'missing-revision' message.
1000          *
1001          * @since 1.19
1002          * @return Content|null
1003          */
1004         private function getOriginalContent() {
1005                 if ( $this->section == 'new' ) {
1006                         return $this->getCurrentContent();
1007                 }
1008                 $revision = $this->mArticle->getRevisionFetched();
1009                 if ( $revision === null ) {
1010                         if ( !$this->contentModel ) {
1011                                 $this->contentModel = $this->getTitle()->getContentModel();
1012                         }
1013                         $handler = ContentHandler::getForModelID( $this->contentModel );
1014
1015                         return $handler->makeEmptyContent();
1016                 }
1017                 $content = $revision->getContent();
1018                 return $content;
1019         }
1020
1021         /**
1022          * Get the current content of the page. This is basically similar to
1023          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1024          * content object is returned instead of null.
1025          *
1026          * @since 1.21
1027          * @return Content
1028          */
1029         protected function getCurrentContent() {
1030                 $rev = $this->mArticle->getRevision();
1031                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1032
1033                 if ( $content === false || $content === null ) {
1034                         if ( !$this->contentModel ) {
1035                                 $this->contentModel = $this->getTitle()->getContentModel();
1036                         }
1037                         $handler = ContentHandler::getForModelID( $this->contentModel );
1038
1039                         return $handler->makeEmptyContent();
1040                 } else {
1041                         # nasty side-effect, but needed for consistency
1042                         $this->contentModel = $rev->getContentModel();
1043                         $this->contentFormat = $rev->getContentFormat();
1044
1045                         return $content;
1046                 }
1047         }
1048
1049         /**
1050          * Use this method before edit() to preload some text into the edit box
1051          *
1052          * @param $text string
1053          * @deprecated since 1.21, use setPreloadedContent() instead.
1054          */
1055         public function setPreloadedText( $text ) {
1056                 ContentHandler::deprecated( __METHOD__, "1.21" );
1057
1058                 $content = $this->toEditContent( $text );
1059
1060                 $this->setPreloadedContent( $content );
1061         }
1062
1063         /**
1064          * Use this method before edit() to preload some content into the edit box
1065          *
1066          * @param $content Content
1067          *
1068          * @since 1.21
1069          */
1070         public function setPreloadedContent( Content $content ) {
1071                 $this->mPreloadContent = $content;
1072         }
1073
1074         /**
1075          * Get the contents to be preloaded into the box, either set by
1076          * an earlier setPreloadText() or by loading the given page.
1077          *
1078          * @param string $preload representing the title to preload from.
1079          *
1080          * @return String
1081          *
1082          * @deprecated since 1.21, use getPreloadedContent() instead
1083          */
1084         protected function getPreloadedText( $preload ) {
1085                 ContentHandler::deprecated( __METHOD__, "1.21" );
1086
1087                 $content = $this->getPreloadedContent( $preload );
1088                 $text = $this->toEditText( $content );
1089
1090                 return $text;
1091         }
1092
1093         /**
1094          * Get the contents to be preloaded into the box, either set by
1095          * an earlier setPreloadText() or by loading the given page.
1096          *
1097          * @param string $preload representing the title to preload from.
1098          *
1099          * @return Content
1100          *
1101          * @since 1.21
1102          */
1103         protected function getPreloadedContent( $preload ) {
1104                 global $wgUser;
1105
1106                 if ( !empty( $this->mPreloadContent ) ) {
1107                         return $this->mPreloadContent;
1108                 }
1109
1110                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1111
1112                 if ( $preload === '' ) {
1113                         return $handler->makeEmptyContent();
1114                 }
1115
1116                 $title = Title::newFromText( $preload );
1117                 # Check for existence to avoid getting MediaWiki:Noarticletext
1118                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1119                         //TODO: somehow show a warning to the user!
1120                         return $handler->makeEmptyContent();
1121                 }
1122
1123                 $page = WikiPage::factory( $title );
1124                 if ( $page->isRedirect() ) {
1125                         $title = $page->getRedirectTarget();
1126                         # Same as before
1127                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1128                                 //TODO: somehow show a warning to the user!
1129                                 return $handler->makeEmptyContent();
1130                         }
1131                         $page = WikiPage::factory( $title );
1132                 }
1133
1134                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1135                 $content = $page->getContent( Revision::RAW );
1136
1137                 if ( !$content ) {
1138                         //TODO: somehow show a warning to the user!
1139                         return $handler->makeEmptyContent();
1140                 }
1141
1142                 if ( $content->getModel() !== $handler->getModelID() ) {
1143                         $converted = $content->convert( $handler->getModelID() );
1144
1145                         if ( !$converted ) {
1146                                 //TODO: somehow show a warning to the user!
1147                                 wfDebug( "Attempt to preload incompatible content: "
1148                                                 . "can't convert " . $content->getModel()
1149                                                 . " to " . $handler->getModelID() );
1150
1151                                 return $handler->makeEmptyContent();
1152                         }
1153
1154                         $content = $converted;
1155                 }
1156
1157                 return $content->preloadTransform( $title, $parserOptions );
1158         }
1159
1160         /**
1161          * Make sure the form isn't faking a user's credentials.
1162          *
1163          * @param $request WebRequest
1164          * @return bool
1165          * @private
1166          */
1167         function tokenOk( &$request ) {
1168                 global $wgUser;
1169                 $token = $request->getVal( 'wpEditToken' );
1170                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1171                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1172                 return $this->mTokenOk;
1173         }
1174
1175         /**
1176          * Sets post-edit cookie indicating the user just saved a particular revision.
1177          *
1178          * This uses a temporary cookie for each revision ID so separate saves will never
1179          * interfere with each other.
1180          *
1181          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1182          * the redirect.  It must be clearable by JavaScript code, so it must not be
1183          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1184          * variable.
1185          *
1186          * We use a path of '/' since wgCookiePath is not exposed to JS
1187          *
1188          * If the variable were set on the server, it would be cached, which is unwanted
1189          * since the post-edit state should only apply to the load right after the save.
1190          */
1191         protected function setPostEditCookie() {
1192                 $revisionId = $this->mArticle->getLatest();
1193                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1194
1195                 $response = RequestContext::getMain()->getRequest()->response();
1196                 $response->setcookie( $postEditKey, '1', time() + self::POST_EDIT_COOKIE_DURATION, array(
1197                         'path' => '/',
1198                         'httpOnly' => false,
1199                 ) );
1200         }
1201
1202         /**
1203          * Attempt submission
1204          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1205          * @return bool false if output is done, true if the rest of the form should be displayed
1206          */
1207         public function attemptSave() {
1208                 global $wgUser;
1209
1210                 $resultDetails = false;
1211                 # Allow bots to exempt some edits from bot flagging
1212                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1213                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1214
1215                 return $this->handleStatus( $status, $resultDetails );
1216         }
1217
1218         /**
1219          * Handle status, such as after attempt save
1220          *
1221          * @param Status $status
1222          * @param array|bool $resultDetails
1223          *
1224          * @throws ErrorPageError
1225          * return bool false, if output is done, true if rest of the form should be displayed
1226          */
1227         private function handleStatus( Status $status, $resultDetails ) {
1228                 global $wgUser, $wgOut;
1229
1230                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1231                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1232                         $this->didSave = true;
1233                         if ( !$resultDetails['nullEdit'] ) {
1234                                 $this->setPostEditCookie();
1235                         }
1236                 }
1237
1238                 switch ( $status->value ) {
1239                         case self::AS_HOOK_ERROR_EXPECTED:
1240                         case self::AS_CONTENT_TOO_BIG:
1241                         case self::AS_ARTICLE_WAS_DELETED:
1242                         case self::AS_CONFLICT_DETECTED:
1243                         case self::AS_SUMMARY_NEEDED:
1244                         case self::AS_TEXTBOX_EMPTY:
1245                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1246                         case self::AS_END:
1247                                 return true;
1248
1249                         case self::AS_HOOK_ERROR:
1250                                 return false;
1251
1252                         case self::AS_PARSE_ERROR:
1253                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1254                                 return true;
1255
1256                         case self::AS_SUCCESS_NEW_ARTICLE:
1257                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1258                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1259                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1260                                 return false;
1261
1262                         case self::AS_SUCCESS_UPDATE:
1263                                 $extraQuery = '';
1264                                 $sectionanchor = $resultDetails['sectionanchor'];
1265
1266                                 // Give extensions a chance to modify URL query on update
1267                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1268
1269                                 if ( $resultDetails['redirect'] ) {
1270                                         if ( $extraQuery == '' ) {
1271                                                 $extraQuery = 'redirect=no';
1272                                         } else {
1273                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1274                                         }
1275                                 }
1276                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1277                                 return false;
1278
1279                         case self::AS_BLANK_ARTICLE:
1280                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1281                                 return false;
1282
1283                         case self::AS_SPAM_ERROR:
1284                                 $this->spamPageWithContent( $resultDetails['spam'] );
1285                                 return false;
1286
1287                         case self::AS_BLOCKED_PAGE_FOR_USER:
1288                                 throw new UserBlockedError( $wgUser->getBlock() );
1289
1290                         case self::AS_IMAGE_REDIRECT_ANON:
1291                         case self::AS_IMAGE_REDIRECT_LOGGED:
1292                                 throw new PermissionsError( 'upload' );
1293
1294                         case self::AS_READ_ONLY_PAGE_ANON:
1295                         case self::AS_READ_ONLY_PAGE_LOGGED:
1296                                 throw new PermissionsError( 'edit' );
1297
1298                         case self::AS_READ_ONLY_PAGE:
1299                                 throw new ReadOnlyError;
1300
1301                         case self::AS_RATE_LIMITED:
1302                                 throw new ThrottledError();
1303
1304                         case self::AS_NO_CREATE_PERMISSION:
1305                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1306                                 throw new PermissionsError( $permission );
1307
1308                         default:
1309                                 // We don't recognize $status->value. The only way that can happen
1310                                 // is if an extension hook aborted from inside ArticleSave.
1311                                 // Render the status object into $this->hookError
1312                                 // FIXME this sucks, we should just use the Status object throughout
1313                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1314                                         '</div>';
1315                                 return true;
1316                 }
1317         }
1318
1319         /**
1320          * Run hooks that can filter edits just before they get saved.
1321          *
1322          * @param Content $content the Content to filter.
1323          * @param Status  $status for reporting the outcome to the caller
1324          * @param User    $user the user performing the edit
1325          *
1326          * @return bool
1327          */
1328         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1329                 // Run old style post-section-merge edit filter
1330                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1331                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1332
1333                         # Error messages etc. could be handled within the hook...
1334                         $status->fatal( 'hookaborted' );
1335                         $status->value = self::AS_HOOK_ERROR;
1336                         return false;
1337                 } elseif ( $this->hookError != '' ) {
1338                         # ...or the hook could be expecting us to produce an error
1339                         $status->fatal( 'hookaborted' );
1340                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1341                         return false;
1342                 }
1343
1344                 // Run new style post-section-merge edit filter
1345                 if ( !wfRunHooks( 'EditFilterMergedContent',
1346                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1347                                 $user, $this->minoredit ) ) ) {
1348
1349                         # Error messages etc. could be handled within the hook...
1350                         // XXX: $status->value may already be something informative...
1351                         $this->hookError = $status->getWikiText();
1352                         $status->fatal( 'hookaborted' );
1353                         $status->value = self::AS_HOOK_ERROR;
1354                         return false;
1355                 } elseif ( !$status->isOK() ) {
1356                         # ...or the hook could be expecting us to produce an error
1357                         // FIXME this sucks, we should just use the Status object throughout
1358                         $this->hookError = $status->getWikiText();
1359                         $status->fatal( 'hookaborted' );
1360                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1361                         return false;
1362                 }
1363
1364                 return true;
1365         }
1366
1367         /**
1368          * Attempt submission (no UI)
1369          *
1370          * @param array $result array to add statuses to, currently with the possible keys:
1371          *  spam - string - Spam string from content if any spam is detected by matchSpamRegex
1372          *  sectionanchor - string - Section anchor for a section save
1373          *  nullEdit - boolean - Set if doEditContent is OK.  True if null edit, false otherwise.
1374          *  redirect - boolean -  Set if doEditContent is OK.  True if resulting revision is a redirect
1375          * @param bool $bot True if edit is being made under the bot right.
1376          *
1377          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1378          *
1379          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1380          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1381          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1382          */
1383         function internalAttemptSave( &$result, $bot = false ) {
1384                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1385
1386                 $status = Status::newGood();
1387
1388                 wfProfileIn( __METHOD__ );
1389                 wfProfileIn( __METHOD__ . '-checks' );
1390
1391                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1392                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1393                         $status->fatal( 'hookaborted' );
1394                         $status->value = self::AS_HOOK_ERROR;
1395                         wfProfileOut( __METHOD__ . '-checks' );
1396                         wfProfileOut( __METHOD__ );
1397                         return $status;
1398                 }
1399
1400                 $spam = $wgRequest->getText( 'wpAntispam' );
1401                 if ( $spam !== '' ) {
1402                         wfDebugLog(
1403                                 'SimpleAntiSpam',
1404                                 $wgUser->getName() .
1405                                 ' editing "' .
1406                                 $this->mTitle->getPrefixedText() .
1407                                 '" submitted bogus field "' .
1408                                 $spam .
1409                                 '"'
1410                         );
1411                         $status->fatal( 'spamprotectionmatch', false );
1412                         $status->value = self::AS_SPAM_ERROR;
1413                         wfProfileOut( __METHOD__ . '-checks' );
1414                         wfProfileOut( __METHOD__ );
1415                         return $status;
1416                 }
1417
1418                 try {
1419                         # Construct Content object
1420                         $textbox_content = $this->toEditContent( $this->textbox1 );
1421                 } catch ( MWContentSerializationException $ex ) {
1422                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1423                         $status->value = self::AS_PARSE_ERROR;
1424                         wfProfileOut( __METHOD__ . '-checks' );
1425                         wfProfileOut( __METHOD__ );
1426                         return $status;
1427                 }
1428
1429                 # Check image redirect
1430                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1431                         $textbox_content->isRedirect() &&
1432                         !$wgUser->isAllowed( 'upload' ) ) {
1433                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1434                                 $status->setResult( false, $code );
1435
1436                                 wfProfileOut( __METHOD__ . '-checks' );
1437                                 wfProfileOut( __METHOD__ );
1438
1439                                 return $status;
1440                 }
1441
1442                 # Check for spam
1443                 $match = self::matchSummarySpamRegex( $this->summary );
1444                 if ( $match === false && $this->section == 'new' ) {
1445                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1446                         # regular summaries, it is added to the actual wikitext.
1447                         if ( $this->sectiontitle !== '' ) {
1448                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1449                                 $match = self::matchSpamRegex( $this->sectiontitle );
1450                         } else {
1451                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1452                                 # is used with the 'summary' parameter.
1453                                 $match = self::matchSpamRegex( $this->summary );
1454                         }
1455                 }
1456                 if ( $match === false ) {
1457                         $match = self::matchSpamRegex( $this->textbox1 );
1458                 }
1459                 if ( $match !== false ) {
1460                         $result['spam'] = $match;
1461                         $ip = $wgRequest->getIP();
1462                         $pdbk = $this->mTitle->getPrefixedDBkey();
1463                         $match = str_replace( "\n", '', $match );
1464                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1465                         $status->fatal( 'spamprotectionmatch', $match );
1466                         $status->value = self::AS_SPAM_ERROR;
1467                         wfProfileOut( __METHOD__ . '-checks' );
1468                         wfProfileOut( __METHOD__ );
1469                         return $status;
1470                 }
1471                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1472                         # Error messages etc. could be handled within the hook...
1473                         $status->fatal( 'hookaborted' );
1474                         $status->value = self::AS_HOOK_ERROR;
1475                         wfProfileOut( __METHOD__ . '-checks' );
1476                         wfProfileOut( __METHOD__ );
1477                         return $status;
1478                 } elseif ( $this->hookError != '' ) {
1479                         # ...or the hook could be expecting us to produce an error
1480                         $status->fatal( 'hookaborted' );
1481                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1482                         wfProfileOut( __METHOD__ . '-checks' );
1483                         wfProfileOut( __METHOD__ );
1484                         return $status;
1485                 }
1486
1487                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1488                         // Auto-block user's IP if the account was "hard" blocked
1489                         $wgUser->spreadAnyEditBlock();
1490                         # Check block state against master, thus 'false'.
1491                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1492                         wfProfileOut( __METHOD__ . '-checks' );
1493                         wfProfileOut( __METHOD__ );
1494                         return $status;
1495                 }
1496
1497                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1498                 if ( $this->kblength > $wgMaxArticleSize ) {
1499                         // Error will be displayed by showEditForm()
1500                         $this->tooBig = true;
1501                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1502                         wfProfileOut( __METHOD__ . '-checks' );
1503                         wfProfileOut( __METHOD__ );
1504                         return $status;
1505                 }
1506
1507                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1508                         if ( $wgUser->isAnon() ) {
1509                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1510                                 wfProfileOut( __METHOD__ . '-checks' );
1511                                 wfProfileOut( __METHOD__ );
1512                                 return $status;
1513                         } else {
1514                                 $status->fatal( 'readonlytext' );
1515                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1516                                 wfProfileOut( __METHOD__ . '-checks' );
1517                                 wfProfileOut( __METHOD__ );
1518                                 return $status;
1519                         }
1520                 }
1521
1522                 if ( wfReadOnly() ) {
1523                         $status->fatal( 'readonlytext' );
1524                         $status->value = self::AS_READ_ONLY_PAGE;
1525                         wfProfileOut( __METHOD__ . '-checks' );
1526                         wfProfileOut( __METHOD__ );
1527                         return $status;
1528                 }
1529                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1530                         $status->fatal( 'actionthrottledtext' );
1531                         $status->value = self::AS_RATE_LIMITED;
1532                         wfProfileOut( __METHOD__ . '-checks' );
1533                         wfProfileOut( __METHOD__ );
1534                         return $status;
1535                 }
1536
1537                 # If the article has been deleted while editing, don't save it without
1538                 # confirmation
1539                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1540                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1541                         wfProfileOut( __METHOD__ . '-checks' );
1542                         wfProfileOut( __METHOD__ );
1543                         return $status;
1544                 }
1545
1546                 wfProfileOut( __METHOD__ . '-checks' );
1547
1548                 # Load the page data from the master. If anything changes in the meantime,
1549                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1550                 $this->mArticle->loadPageData( 'fromdbmaster' );
1551                 $new = !$this->mArticle->exists();
1552
1553                 if ( $new ) {
1554                         // Late check for create permission, just in case *PARANOIA*
1555                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1556                                 $status->fatal( 'nocreatetext' );
1557                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1558                                 wfDebug( __METHOD__ . ": no create permission\n" );
1559                                 wfProfileOut( __METHOD__ );
1560                                 return $status;
1561                         }
1562
1563                         // Don't save a new page if it's blank or if it's a MediaWiki:
1564                         // message with content equivalent to default (allow empty pages
1565                         // in this case to disable messages, see bug 50124)
1566                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1567                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1568                                 $defaultText = $defaultMessageText;
1569                         } else {
1570                                 $defaultText = '';
1571                         }
1572
1573                         if ( $this->textbox1 === $defaultText ) {
1574                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1575                                 wfProfileOut( __METHOD__ );
1576                                 return $status;
1577                         }
1578
1579                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1580                                 wfProfileOut( __METHOD__ );
1581                                 return $status;
1582                         }
1583
1584                         $content = $textbox_content;
1585
1586                         $result['sectionanchor'] = '';
1587                         if ( $this->section == 'new' ) {
1588                                 if ( $this->sectiontitle !== '' ) {
1589                                         // Insert the section title above the content.
1590                                         $content = $content->addSectionHeader( $this->sectiontitle );
1591
1592                                         // Jump to the new section
1593                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1594
1595                                         // If no edit summary was specified, create one automatically from the section
1596                                         // title and have it link to the new section. Otherwise, respect the summary as
1597                                         // passed.
1598                                         if ( $this->summary === '' ) {
1599                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1600                                                 $this->summary = wfMessage( 'newsectionsummary' )
1601                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1602                                         }
1603                                 } elseif ( $this->summary !== '' ) {
1604                                         // Insert the section title above the content.
1605                                         $content = $content->addSectionHeader( $this->summary );
1606
1607                                         // Jump to the new section
1608                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1609
1610                                         // Create a link to the new section from the edit summary.
1611                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1612                                         $this->summary = wfMessage( 'newsectionsummary' )
1613                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1614                                 }
1615                         }
1616
1617                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1618
1619                 } else { # not $new
1620
1621                         # Article exists. Check for edit conflict.
1622
1623                         $this->mArticle->clear(); # Force reload of dates, etc.
1624                         $timestamp = $this->mArticle->getTimestamp();
1625
1626                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1627
1628                         if ( $timestamp != $this->edittime ) {
1629                                 $this->isConflict = true;
1630                                 if ( $this->section == 'new' ) {
1631                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1632                                                 $this->mArticle->getComment() == $this->summary ) {
1633                                                 // Probably a duplicate submission of a new comment.
1634                                                 // This can happen when squid resends a request after
1635                                                 // a timeout but the first one actually went through.
1636                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1637                                         } else {
1638                                                 // New comment; suppress conflict.
1639                                                 $this->isConflict = false;
1640                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1641                                         }
1642                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER, $this->mTitle->getArticleID(),
1643                                                         $wgUser->getId(), $this->edittime ) ) {
1644                                         # Suppress edit conflict with self, except for section edits where merging is required.
1645                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1646                                         $this->isConflict = false;
1647                                 }
1648                         }
1649
1650                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1651                         if ( $this->sectiontitle !== '' ) {
1652                                 $sectionTitle = $this->sectiontitle;
1653                         } else {
1654                                 $sectionTitle = $this->summary;
1655                         }
1656
1657                         $content = null;
1658
1659                         if ( $this->isConflict ) {
1660                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1661                                                 . " (article time '{$timestamp}')\n" );
1662
1663                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1664                         } else {
1665                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1666                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1667                         }
1668
1669                         if ( is_null( $content ) ) {
1670                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1671                                 $this->isConflict = true;
1672                                 $content = $textbox_content; // do not try to merge here!
1673                         } elseif ( $this->isConflict ) {
1674                                 # Attempt merge
1675                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1676                                         // Successful merge! Maybe we should tell the user the good news?
1677                                         $this->isConflict = false;
1678                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1679                                 } else {
1680                                         $this->section = '';
1681                                         $this->textbox1 = ContentHandler::getContentText( $content );
1682                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1683                                 }
1684                         }
1685
1686                         if ( $this->isConflict ) {
1687                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1688                                 wfProfileOut( __METHOD__ );
1689                                 return $status;
1690                         }
1691
1692                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1693                                 wfProfileOut( __METHOD__ );
1694                                 return $status;
1695                         }
1696
1697                         if ( $this->section == 'new' ) {
1698                                 // Handle the user preference to force summaries here
1699                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1700                                         $this->missingSummary = true;
1701                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1702                                         $status->value = self::AS_SUMMARY_NEEDED;
1703                                         wfProfileOut( __METHOD__ );
1704                                         return $status;
1705                                 }
1706
1707                                 // Do not allow the user to post an empty comment
1708                                 if ( $this->textbox1 == '' ) {
1709                                         $this->missingComment = true;
1710                                         $status->fatal( 'missingcommenttext' );
1711                                         $status->value = self::AS_TEXTBOX_EMPTY;
1712                                         wfProfileOut( __METHOD__ );
1713                                         return $status;
1714                                 }
1715                         } elseif ( !$this->allowBlankSummary
1716                                 && !$content->equals( $this->getOriginalContent() )
1717                                 && !$content->isRedirect()
1718                                 && md5( $this->summary ) == $this->autoSumm
1719                         ) {
1720                                 $this->missingSummary = true;
1721                                 $status->fatal( 'missingsummary' );
1722                                 $status->value = self::AS_SUMMARY_NEEDED;
1723                                 wfProfileOut( __METHOD__ );
1724                                 return $status;
1725                         }
1726
1727                         # All's well
1728                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1729                         $sectionanchor = '';
1730                         if ( $this->section == 'new' ) {
1731                                 if ( $this->sectiontitle !== '' ) {
1732                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1733                                         // If no edit summary was specified, create one automatically from the section
1734                                         // title and have it link to the new section. Otherwise, respect the summary as
1735                                         // passed.
1736                                         if ( $this->summary === '' ) {
1737                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1738                                                 $this->summary = wfMessage( 'newsectionsummary' )
1739                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1740                                         }
1741                                 } elseif ( $this->summary !== '' ) {
1742                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1743                                         # This is a new section, so create a link to the new section
1744                                         # in the revision summary.
1745                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1746                                         $this->summary = wfMessage( 'newsectionsummary' )
1747                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1748                                 }
1749                         } elseif ( $this->section != '' ) {
1750                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1751                                 # XXX: might be better to integrate this into Article::replaceSection
1752                                 # for duplicate heading checking and maybe parsing
1753                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1754                                 # we can't deal with anchors, includes, html etc in the header for now,
1755                                 # headline would need to be parsed to improve this
1756                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1757                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1758                                 }
1759                         }
1760                         $result['sectionanchor'] = $sectionanchor;
1761                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1762
1763                         // Save errors may fall down to the edit form, but we've now
1764                         // merged the section into full text. Clear the section field
1765                         // so that later submission of conflict forms won't try to
1766                         // replace that into a duplicated mess.
1767                         $this->textbox1 = $this->toEditText( $content );
1768                         $this->section = '';
1769
1770                         $status->value = self::AS_SUCCESS_UPDATE;
1771                 }
1772
1773                 // Check for length errors again now that the section is merged in
1774                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1775                 if ( $this->kblength > $wgMaxArticleSize ) {
1776                         $this->tooBig = true;
1777                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1778                         wfProfileOut( __METHOD__ );
1779                         return $status;
1780                 }
1781
1782                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1783                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1784                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1785                         ( $bot ? EDIT_FORCE_BOT : 0 );
1786
1787                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1788                                                                                                                         false, null, $this->contentFormat );
1789
1790                 if ( !$doEditStatus->isOK() ) {
1791                         // Failure from doEdit()
1792                         // Show the edit conflict page for certain recognized errors from doEdit(),
1793                         // but don't show it for errors from extension hooks
1794                         $errors = $doEditStatus->getErrorsArray();
1795                         if ( in_array( $errors[0][0],
1796                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1797                         ) {
1798                                 $this->isConflict = true;
1799                                 // Destroys data doEdit() put in $status->value but who cares
1800                                 $doEditStatus->value = self::AS_END;
1801                         }
1802                         wfProfileOut( __METHOD__ );
1803                         return $doEditStatus;
1804                 }
1805
1806                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1807                 if ( $result['nullEdit'] ) {
1808                         // We don't know if it was a null edit until now, so increment here
1809                         $wgUser->pingLimiter( 'linkpurge' );
1810                 }
1811                 $result['redirect'] = $content->isRedirect();
1812                 $this->updateWatchlist();
1813                 wfProfileOut( __METHOD__ );
1814                 return $status;
1815         }
1816
1817         /**
1818          * Register the change of watch status
1819          */
1820         protected function updateWatchlist() {
1821                 global $wgUser;
1822
1823                 if ( $wgUser->isLoggedIn()
1824                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1825                 ) {
1826                         $fname = __METHOD__;
1827                         $title = $this->mTitle;
1828                         $watch = $this->watchthis;
1829
1830                         // Do this in its own transaction to reduce contention...
1831                         $dbw = wfGetDB( DB_MASTER );
1832                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1833                                 $dbw->begin( $fname );
1834                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
1835                                 $dbw->commit( $fname );
1836                         } );
1837                 }
1838         }
1839
1840         /**
1841          * Attempts to merge text content with base and current revisions
1842          *
1843          * @param $editText string
1844          *
1845          * @return bool
1846          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1847          */
1848         function mergeChangesInto( &$editText ) {
1849                 ContentHandler::deprecated( __METHOD__, "1.21" );
1850
1851                 $editContent = $this->toEditContent( $editText );
1852
1853                 $ok = $this->mergeChangesIntoContent( $editContent );
1854
1855                 if ( $ok ) {
1856                         $editText = $this->toEditText( $editContent );
1857                         return true;
1858                 }
1859                 return false;
1860         }
1861
1862         /**
1863          * Attempts to do 3-way merge of edit content with a base revision
1864          * and current content, in case of edit conflict, in whichever way appropriate
1865          * for the content type.
1866          *
1867          * @since 1.21
1868          *
1869          * @param $editContent
1870          *
1871          * @return bool
1872          */
1873         private function mergeChangesIntoContent( &$editContent ) {
1874                 wfProfileIn( __METHOD__ );
1875
1876                 $db = wfGetDB( DB_MASTER );
1877
1878                 // This is the revision the editor started from
1879                 $baseRevision = $this->getBaseRevision();
1880                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1881
1882                 if ( is_null( $baseContent ) ) {
1883                         wfProfileOut( __METHOD__ );
1884                         return false;
1885                 }
1886
1887                 // The current state, we want to merge updates into it
1888                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1889                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1890
1891                 if ( is_null( $currentContent ) ) {
1892                         wfProfileOut( __METHOD__ );
1893                         return false;
1894                 }
1895
1896                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1897
1898                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1899
1900                 if ( $result ) {
1901                         $editContent = $result;
1902                         wfProfileOut( __METHOD__ );
1903                         return true;
1904                 }
1905
1906                 wfProfileOut( __METHOD__ );
1907                 return false;
1908         }
1909
1910         /**
1911          * @return Revision
1912          */
1913         function getBaseRevision() {
1914                 if ( !$this->mBaseRevision ) {
1915                         $db = wfGetDB( DB_MASTER );
1916                         $baseRevision = Revision::loadFromTimestamp(
1917                                 $db, $this->mTitle, $this->edittime );
1918                         return $this->mBaseRevision = $baseRevision;
1919                 } else {
1920                         return $this->mBaseRevision;
1921                 }
1922         }
1923
1924         /**
1925          * Check given input text against $wgSpamRegex, and return the text of the first match.
1926          *
1927          * @param $text string
1928          *
1929          * @return string|bool matching string or false
1930          */
1931         public static function matchSpamRegex( $text ) {
1932                 global $wgSpamRegex;
1933                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1934                 $regexes = (array)$wgSpamRegex;
1935                 return self::matchSpamRegexInternal( $text, $regexes );
1936         }
1937
1938         /**
1939          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
1940          *
1941          * @param $text string
1942          *
1943          * @return string|bool matching string or false
1944          */
1945         public static function matchSummarySpamRegex( $text ) {
1946                 global $wgSummarySpamRegex;
1947                 $regexes = (array)$wgSummarySpamRegex;
1948                 return self::matchSpamRegexInternal( $text, $regexes );
1949         }
1950
1951         /**
1952          * @param $text string
1953          * @param $regexes array
1954          * @return bool|string
1955          */
1956         protected static function matchSpamRegexInternal( $text, $regexes ) {
1957                 foreach ( $regexes as $regex ) {
1958                         $matches = array();
1959                         if ( preg_match( $regex, $text, $matches ) ) {
1960                                 return $matches[0];
1961                         }
1962                 }
1963                 return false;
1964         }
1965
1966         function setHeaders() {
1967                 global $wgOut, $wgUser;
1968
1969                 $wgOut->addModules( 'mediawiki.action.edit' );
1970                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
1971
1972                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1973                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1974                 }
1975
1976                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
1977                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
1978                 }
1979
1980                 // Bug #19334: textarea jumps when editing articles in IE8
1981                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1982
1983                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1984
1985                 # Enabled article-related sidebar, toplinks, etc.
1986                 $wgOut->setArticleRelated( true );
1987
1988                 $contextTitle = $this->getContextTitle();
1989                 if ( $this->isConflict ) {
1990                         $msg = 'editconflict';
1991                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1992                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1993                 } else {
1994                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1995                                 'editing' : 'creating';
1996                 }
1997                 # Use the title defined by DISPLAYTITLE magic word when present
1998                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1999                 if ( $displayTitle === false ) {
2000                         $displayTitle = $contextTitle->getPrefixedText();
2001                 }
2002                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2003         }
2004
2005         /**
2006          * Show all applicable editing introductions
2007          */
2008         protected function showIntro() {
2009                 global $wgOut, $wgUser;
2010                 if ( $this->suppressIntro ) {
2011                         return;
2012                 }
2013
2014                 $namespace = $this->mTitle->getNamespace();
2015
2016                 if ( $namespace == NS_MEDIAWIKI ) {
2017                         # Show a warning if editing an interface message
2018                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2019                 } elseif ( $namespace == NS_FILE ) {
2020                         # Show a hint to shared repo
2021                         $file = wfFindFile( $this->mTitle );
2022                         if ( $file && !$file->isLocal() ) {
2023                                 $descUrl = $file->getDescriptionUrl();
2024                                 # there must be a description url to show a hint to shared repo
2025                                 if ( $descUrl ) {
2026                                         if ( !$this->mTitle->exists() ) {
2027                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2028                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2029                                                 ) );
2030                                         } else {
2031                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2032                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2033                                                 ) );
2034                                         }
2035                                 }
2036                         }
2037                 }
2038
2039                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2040                 # Show log extract when the user is currently blocked
2041                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2042                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2043                         $username = $parts[0];
2044                         $user = User::newFromName( $username, false /* allow IP users*/ );
2045                         $ip = User::isIP( $username );
2046                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2047                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2048                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2049                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
2050                                 LogEventsList::showLogExtract(
2051                                         $wgOut,
2052                                         'block',
2053                                         $user->getUserPage(),
2054                                         '',
2055                                         array(
2056                                                 'lim' => 1,
2057                                                 'showIfEmpty' => false,
2058                                                 'msgKey' => array(
2059                                                         'blocked-notice-logextract',
2060                                                         $user->getName() # Support GENDER in notice
2061                                                 )
2062                                         )
2063                                 );
2064                         }
2065                 }
2066                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2067                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2068                         if ( $wgUser->isLoggedIn() ) {
2069                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
2070                         } else {
2071                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
2072                         }
2073                 }
2074                 # Give a notice if the user is editing a deleted/moved page...
2075                 if ( !$this->mTitle->exists() ) {
2076                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2077                                 '',
2078                                 array(
2079                                         'lim' => 10,
2080                                         'conds' => array( "log_action != 'revision'" ),
2081                                         'showIfEmpty' => false,
2082                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2083                                 )
2084                         );
2085                 }
2086         }
2087
2088         /**
2089          * Attempt to show a custom editing introduction, if supplied
2090          *
2091          * @return bool
2092          */
2093         protected function showCustomIntro() {
2094                 if ( $this->editintro ) {
2095                         $title = Title::newFromText( $this->editintro );
2096                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2097                                 global $wgOut;
2098                                 // Added using template syntax, to take <noinclude>'s into account.
2099                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
2100                                 return true;
2101                         }
2102                 }
2103                 return false;
2104         }
2105
2106         /**
2107          * Gets an editable textual representation of $content.
2108          * The textual representation can be turned by into a Content object by the
2109          * toEditContent() method.
2110          *
2111          * If $content is null or false or a string, $content is returned unchanged.
2112          *
2113          * If the given Content object is not of a type that can be edited using the text base EditPage,
2114          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2115          * content.
2116          *
2117          * @param Content|null|bool|string $content
2118          * @return String the editable text form of the content.
2119          *
2120          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
2121          */
2122         protected function toEditText( $content ) {
2123                 if ( $content === null || $content === false ) {
2124                         return $content;
2125                 }
2126
2127                 if ( is_string( $content ) ) {
2128                         return $content;
2129                 }
2130
2131                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2132                         throw new MWException( "This content model can not be edited as text: "
2133                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2134                 }
2135
2136                 return $content->serialize( $this->contentFormat );
2137         }
2138
2139         /**
2140          * Turns the given text into a Content object by unserializing it.
2141          *
2142          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
2143          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
2144          * content.
2145          *
2146          * @param string|null|bool $text Text to unserialize
2147          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
2148          *                 returned instead.
2149          *
2150          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
2151          *          and $this->allowNonTextContent is not true.
2152          */
2153         protected function toEditContent( $text ) {
2154                 if ( $text === false || $text === null ) {
2155                         return $text;
2156                 }
2157
2158                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2159                         $this->contentModel, $this->contentFormat );
2160
2161                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
2162                         throw new MWException( "This content model can not be edited as text: "
2163                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2164                 }
2165
2166                 return $content;
2167         }
2168
2169         /**
2170          * Send the edit form and related headers to $wgOut
2171          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
2172          *     during form output near the top, for captchas and the like.
2173          */
2174         function showEditForm( $formCallback = null ) {
2175                 global $wgOut, $wgUser;
2176
2177                 wfProfileIn( __METHOD__ );
2178
2179                 # need to parse the preview early so that we know which templates are used,
2180                 # otherwise users with "show preview after edit box" will get a blank list
2181                 # we parse this near the beginning so that setHeaders can do the title
2182                 # setting work instead of leaving it in getPreviewText
2183                 $previewOutput = '';
2184                 if ( $this->formtype == 'preview' ) {
2185                         $previewOutput = $this->getPreviewText();
2186                 }
2187
2188                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2189
2190                 $this->setHeaders();
2191
2192                 if ( $this->showHeader() === false ) {
2193                         wfProfileOut( __METHOD__ );
2194                         return;
2195                 }
2196
2197                 $wgOut->addHTML( $this->editFormPageTop );
2198
2199                 if ( $wgUser->getOption( 'previewontop' ) ) {
2200                         $this->displayPreviewArea( $previewOutput, true );
2201                 }
2202
2203                 $wgOut->addHTML( $this->editFormTextTop );
2204
2205                 $showToolbar = true;
2206                 if ( $this->wasDeletedSinceLastEdit() ) {
2207                         if ( $this->formtype == 'save' ) {
2208                                 // Hide the toolbar and edit area, user can click preview to get it back
2209                                 // Add an confirmation checkbox and explanation.
2210                                 $showToolbar = false;
2211                         } else {
2212                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2213                                         'deletedwhileediting' );
2214                         }
2215                 }
2216
2217                 // @todo add EditForm plugin interface and use it here!
2218                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2219                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2220                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2221                         'enctype' => 'multipart/form-data' ) ) );
2222
2223                 if ( is_callable( $formCallback ) ) {
2224                         call_user_func_array( $formCallback, array( &$wgOut ) );
2225                 }
2226
2227                 // Add an empty field to trip up spambots
2228                 $wgOut->addHTML(
2229                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2230                         . Html::rawElement( 'label', array( 'for' => 'wpAntiSpam' ), wfMessage( 'simpleantispam-label' )->parse() )
2231                         . Xml::element( 'input', array( 'type' => 'text', 'name' => 'wpAntispam', 'id' => 'wpAntispam', 'value' => '' ) )
2232                         . Xml::closeElement( 'div' )
2233                 );
2234
2235                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2236
2237                 // Put these up at the top to ensure they aren't lost on early form submission
2238                 $this->showFormBeforeText();
2239
2240                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2241                         $username = $this->lastDelete->user_name;
2242                         $comment = $this->lastDelete->log_comment;
2243
2244                         // It is better to not parse the comment at all than to have templates expanded in the middle
2245                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2246                         $key = $comment === ''
2247                                 ? 'confirmrecreate-noreason'
2248                                 : 'confirmrecreate';
2249                         $wgOut->addHTML(
2250                                 '<div class="mw-confirm-recreate">' .
2251                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2252                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2253                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2254                                 ) .
2255                                 '</div>'
2256                         );
2257                 }
2258
2259                 # When the summary is hidden, also hide them on preview/show changes
2260                 if ( $this->nosummary ) {
2261                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2262                 }
2263
2264                 # If a blank edit summary was previously provided, and the appropriate
2265                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2266                 # user being bounced back more than once in the event that a summary
2267                 # is not required.
2268                 #####
2269                 # For a bit more sophisticated detection of blank summaries, hash the
2270                 # automatic one and pass that in the hidden field wpAutoSummary.
2271                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2272                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2273                 }
2274
2275                 if ( $this->undidRev ) {
2276                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2277                 }
2278
2279                 if ( $this->hasPresetSummary ) {
2280                         // If a summary has been preset using &summary= we don't want to prompt for
2281                         // a different summary. Only prompt for a summary if the summary is blanked.
2282                         // (Bug 17416)
2283                         $this->autoSumm = md5( '' );
2284                 }
2285
2286                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2287                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2288
2289                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2290
2291                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2292                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2293
2294                 if ( $this->section == 'new' ) {
2295                         $this->showSummaryInput( true, $this->summary );
2296                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2297                 }
2298
2299                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2300
2301                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2302                         $wgOut->addHTML( EditPage::getEditToolbar() );
2303                 }
2304
2305                 if ( $this->isConflict ) {
2306                         // In an edit conflict bypass the overridable content form method
2307                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2308                         // resolved between page source edits and custom ui edits using the
2309                         // custom edit ui.
2310                         $this->textbox2 = $this->textbox1;
2311
2312                         $content = $this->getCurrentContent();
2313                         $this->textbox1 = $this->toEditText( $content );
2314
2315                         $this->showTextbox1();
2316                 } else {
2317                         $this->showContentForm();
2318                 }
2319
2320                 $wgOut->addHTML( $this->editFormTextAfterContent );
2321
2322                 $this->showStandardInputs();
2323
2324                 $this->showFormAfterText();
2325
2326                 $this->showTosSummary();
2327
2328                 $this->showEditTools();
2329
2330                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2331
2332                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2333                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2334
2335                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2336                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2337
2338                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2339                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2340
2341                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2342
2343                 if ( $this->isConflict ) {
2344                         try {
2345                                 $this->showConflict();
2346                         } catch ( MWContentSerializationException $ex ) {
2347                                 // this can't really happen, but be nice if it does.
2348                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2349                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2350                         }
2351                 }
2352
2353                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2354
2355                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2356                         $this->displayPreviewArea( $previewOutput, false );
2357                 }
2358
2359                 wfProfileOut( __METHOD__ );
2360         }
2361
2362         /**
2363          * Extract the section title from current section text, if any.
2364          *
2365          * @param string $text
2366          * @return Mixed|string or false
2367          */
2368         public static function extractSectionTitle( $text ) {
2369                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2370                 if ( !empty( $matches[2] ) ) {
2371                         global $wgParser;
2372                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2373                 } else {
2374                         return false;
2375                 }
2376         }
2377
2378         protected function showHeader() {
2379                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2380
2381                 if ( $this->mTitle->isTalkPage() ) {
2382                         $wgOut->addWikiMsg( 'talkpagetext' );
2383                 }
2384
2385                 // Add edit notices
2386                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2387
2388                 if ( $this->isConflict ) {
2389                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2390                         $this->edittime = $this->mArticle->getTimestamp();
2391                 } else {
2392                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2393                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2394                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2395                                 // Someone is welcome to try refactoring though
2396                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2397                                 return false;
2398                         }
2399
2400                         if ( $this->section != '' && $this->section != 'new' ) {
2401                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2402                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2403                                         if ( $sectionTitle !== false ) {
2404                                                 $this->summary = "/* $sectionTitle */ ";
2405                                         }
2406                                 }
2407                         }
2408
2409                         if ( $this->missingComment ) {
2410                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2411                         }
2412
2413                         if ( $this->missingSummary && $this->section != 'new' ) {
2414                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2415                         }
2416
2417                         if ( $this->missingSummary && $this->section == 'new' ) {
2418                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2419                         }
2420
2421                         if ( $this->hookError !== '' ) {
2422                                 $wgOut->addWikiText( $this->hookError );
2423                         }
2424
2425                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2426                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2427                         }
2428
2429                         if ( $this->section != 'new' ) {
2430                                 $revision = $this->mArticle->getRevisionFetched();
2431                                 if ( $revision ) {
2432                                         // Let sysop know that this will make private content public if saved
2433
2434                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2435                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2436                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2437                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2438                                         }
2439
2440                                         if ( !$revision->isCurrent() ) {
2441                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2442                                                 $wgOut->addWikiMsg( 'editingold' );
2443                                         }
2444                                 } elseif ( $this->mTitle->exists() ) {
2445                                         // Something went wrong
2446
2447                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2448                                                 array( 'missing-revision', $this->oldid ) );
2449                                 }
2450                         }
2451                 }
2452
2453                 if ( wfReadOnly() ) {
2454                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2455                 } elseif ( $wgUser->isAnon() ) {
2456                         if ( $this->formtype != 'preview' ) {
2457                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2458                         } else {
2459                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2460                         }
2461                 } else {
2462                         if ( $this->isCssJsSubpage ) {
2463                                 # Check the skin exists
2464                                 if ( $this->isWrongCaseCssJsPage ) {
2465                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2466                                 }
2467                                 if ( $this->formtype !== 'preview' ) {
2468                                         if ( $this->isCssSubpage ) {
2469                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2470                                         }
2471
2472                                         if ( $this->isJsSubpage ) {
2473                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2474                                         }
2475                                 }
2476                         }
2477                 }
2478
2479                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2480                         # Is the title semi-protected?
2481                         if ( $this->mTitle->isSemiProtected() ) {
2482                                 $noticeMsg = 'semiprotectedpagewarning';
2483                         } else {
2484                                 # Then it must be protected based on static groups (regular)
2485                                 $noticeMsg = 'protectedpagewarning';
2486                         }
2487                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2488                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2489                 }
2490                 if ( $this->mTitle->isCascadeProtected() ) {
2491                         # Is this page under cascading protection from some source pages?
2492                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2493                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2494                         $cascadeSourcesCount = count( $cascadeSources );
2495                         if ( $cascadeSourcesCount > 0 ) {
2496                                 # Explain, and list the titles responsible
2497                                 foreach ( $cascadeSources as $page ) {
2498                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2499                                 }
2500                         }
2501                         $notice .= '</div>';
2502                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2503                 }
2504                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2505                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2506                                 array( 'lim' => 1,
2507                                         'showIfEmpty' => false,
2508                                         'msgKey' => array( 'titleprotectedwarning' ),
2509                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2510                 }
2511
2512                 if ( $this->kblength === false ) {
2513                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2514                 }
2515
2516                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2517                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2518                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2519                 } else {
2520                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2521                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2522                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2523                                 );
2524                         }
2525                 }
2526                 # Add header copyright warning
2527                 $this->showHeaderCopyrightWarning();
2528         }
2529
2530         /**
2531          * Standard summary input and label (wgSummary), abstracted so EditPage
2532          * subclasses may reorganize the form.
2533          * Note that you do not need to worry about the label's for=, it will be
2534          * inferred by the id given to the input. You can remove them both by
2535          * passing array( 'id' => false ) to $userInputAttrs.
2536          *
2537          * @param string $summary The value of the summary input
2538          * @param string $labelText The html to place inside the label
2539          * @param array $inputAttrs of attrs to use on the input
2540          * @param array $spanLabelAttrs of attrs to use on the span inside the label
2541          *
2542          * @return array An array in the format array( $label, $input )
2543          */
2544         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2545                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2546                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2547                         'id' => 'wpSummary',
2548                         'maxlength' => '200',
2549                         'tabindex' => '1',
2550                         'size' => 60,
2551                         'spellcheck' => 'true',
2552                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2553
2554                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2555                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2556                         'id' => "wpSummaryLabel"
2557                 );
2558
2559                 $label = null;
2560                 if ( $labelText ) {
2561                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2562                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2563                 }
2564
2565                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2566
2567                 return array( $label, $input );
2568         }
2569
2570         /**
2571          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2572          *                          up top, or false if this is the comment summary
2573          *                          down below the textarea
2574          * @param string $summary The text of the summary to display
2575          * @return String
2576          */
2577         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2578                 global $wgOut, $wgContLang;
2579                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2580                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2581                 if ( $isSubjectPreview ) {
2582                         if ( $this->nosummary ) {
2583                                 return;
2584                         }
2585                 } else {
2586                         if ( !$this->mShowSummaryField ) {
2587                                 return;
2588                         }
2589                 }
2590                 $summary = $wgContLang->recodeForEdit( $summary );
2591                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2592                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2593                 $wgOut->addHTML( "{$label} {$input}" );
2594         }
2595
2596         /**
2597          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2598          *                          up top, or false if this is the comment summary
2599          *                          down below the textarea
2600          * @param string $summary the text of the summary to display
2601          * @return String
2602          */
2603         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2604                 // avoid spaces in preview, gets always trimmed on save
2605                 $summary = trim( $summary );
2606                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2607                         return "";
2608                 }
2609
2610                 global $wgParser;
2611
2612                 if ( $isSubjectPreview ) {
2613                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2614                                 ->inContentLanguage()->text();
2615                 }
2616
2617                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2618
2619                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2620                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2621         }
2622
2623         protected function showFormBeforeText() {
2624                 global $wgOut;
2625                 $section = htmlspecialchars( $this->section );
2626                 $wgOut->addHTML( <<<HTML
2627 <input type='hidden' value="{$section}" name="wpSection" />
2628 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2629 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2630 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2631
2632 HTML
2633                 );
2634                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2635                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2636                 }
2637         }
2638
2639         protected function showFormAfterText() {
2640                 global $wgOut, $wgUser;
2641                 /**
2642                  * To make it harder for someone to slip a user a page
2643                  * which submits an edit form to the wiki without their
2644                  * knowledge, a random token is associated with the login
2645                  * session. If it's not passed back with the submission,
2646                  * we won't save the page, or render user JavaScript and
2647                  * CSS previews.
2648                  *
2649                  * For anon editors, who may not have a session, we just
2650                  * include the constant suffix to prevent editing from
2651                  * broken text-mangling proxies.
2652                  */
2653                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2654         }
2655
2656         /**
2657          * Subpage overridable method for printing the form for page content editing
2658          * By default this simply outputs wpTextbox1
2659          * Subclasses can override this to provide a custom UI for editing;
2660          * be it a form, or simply wpTextbox1 with a modified content that will be
2661          * reverse modified when extracted from the post data.
2662          * Note that this is basically the inverse for importContentFormData
2663          */
2664         protected function showContentForm() {
2665                 $this->showTextbox1();
2666         }
2667
2668         /**
2669          * Method to output wpTextbox1
2670          * The $textoverride method can be used by subclasses overriding showContentForm
2671          * to pass back to this method.
2672          *
2673          * @param array $customAttribs of html attributes to use in the textarea
2674          * @param string $textoverride optional text to override $this->textarea1 with
2675          */
2676         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2677                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2678                         $attribs = array( 'style' => 'display:none;' );
2679                 } else {
2680                         $classes = array(); // Textarea CSS
2681                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2682                                 # Is the title semi-protected?
2683                                 if ( $this->mTitle->isSemiProtected() ) {
2684                                         $classes[] = 'mw-textarea-sprotected';
2685                                 } else {
2686                                         # Then it must be protected based on static groups (regular)
2687                                         $classes[] = 'mw-textarea-protected';
2688                                 }
2689                                 # Is the title cascade-protected?
2690                                 if ( $this->mTitle->isCascadeProtected() ) {
2691                                         $classes[] = 'mw-textarea-cprotected';
2692                                 }
2693                         }
2694
2695                         $attribs = array( 'tabindex' => 1 );
2696
2697                         if ( is_array( $customAttribs ) ) {
2698                                 $attribs += $customAttribs;
2699                         }
2700
2701                         if ( count( $classes ) ) {
2702                                 if ( isset( $attribs['class'] ) ) {
2703                                         $classes[] = $attribs['class'];
2704                                 }
2705                                 $attribs['class'] = implode( ' ', $classes );
2706                         }
2707                 }
2708
2709                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2710         }
2711
2712         protected function showTextbox2() {
2713                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2714         }
2715
2716         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2717                 global $wgOut, $wgUser;
2718
2719                 $wikitext = $this->safeUnicodeOutput( $text );
2720                 if ( strval( $wikitext ) !== '' ) {
2721                         // Ensure there's a newline at the end, otherwise adding lines
2722                         // is awkward.
2723                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2724                         // mode will show an extra newline. A bit annoying.
2725                         $wikitext .= "\n";
2726                 }
2727
2728                 $attribs = $customAttribs + array(
2729                         'accesskey' => ',',
2730                         'id' => $name,
2731                         'cols' => $wgUser->getIntOption( 'cols' ),
2732                         'rows' => $wgUser->getIntOption( 'rows' ),
2733                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2734                 );
2735
2736                 $pageLang = $this->mTitle->getPageLanguage();
2737                 $attribs['lang'] = $pageLang->getCode();
2738                 $attribs['dir'] = $pageLang->getDir();
2739
2740                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2741         }
2742
2743         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2744                 global $wgOut;
2745                 $classes = array();
2746                 if ( $isOnTop ) {
2747                         $classes[] = 'ontop';
2748                 }
2749
2750                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2751
2752                 if ( $this->formtype != 'preview' ) {
2753                         $attribs['style'] = 'display: none;';
2754                 }
2755
2756                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2757
2758                 if ( $this->formtype == 'preview' ) {
2759                         $this->showPreview( $previewOutput );
2760                 }
2761
2762                 $wgOut->addHTML( '</div>' );
2763
2764                 if ( $this->formtype == 'diff' ) {
2765                         try {
2766                                 $this->showDiff();
2767                         } catch ( MWContentSerializationException $ex ) {
2768                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2769                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2770                         }
2771                 }
2772         }
2773
2774         /**
2775          * Append preview output to $wgOut.
2776          * Includes category rendering if this is a category page.
2777          *
2778          * @param string $text the HTML to be output for the preview.
2779          */
2780         protected function showPreview( $text ) {
2781                 global $wgOut;
2782                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2783                         $this->mArticle->openShowCategory();
2784                 }
2785                 # This hook seems slightly odd here, but makes things more
2786                 # consistent for extensions.
2787                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2788                 $wgOut->addHTML( $text );
2789                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2790                         $this->mArticle->closeShowCategory();
2791                 }
2792         }
2793
2794         /**
2795          * Get a diff between the current contents of the edit box and the
2796          * version of the page we're editing from.
2797          *
2798          * If this is a section edit, we'll replace the section as for final
2799          * save and then make a comparison.
2800          */
2801         function showDiff() {
2802                 global $wgUser, $wgContLang, $wgOut;
2803
2804                 $oldtitlemsg = 'currentrev';
2805                 # if message does not exist, show diff against the preloaded default
2806                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2807                         $oldtext = $this->mTitle->getDefaultMessageText();
2808                         if ( $oldtext !== false ) {
2809                                 $oldtitlemsg = 'defaultmessagetext';
2810                                 $oldContent = $this->toEditContent( $oldtext );
2811                         } else {
2812                                 $oldContent = null;
2813                         }
2814                 } else {
2815                         $oldContent = $this->getCurrentContent();
2816                 }
2817
2818                 $textboxContent = $this->toEditContent( $this->textbox1 );
2819
2820                 $newContent = $this->mArticle->replaceSectionContent(
2821                                                         $this->section, $textboxContent,
2822                                                         $this->summary, $this->edittime );
2823
2824                 if ( $newContent ) {
2825                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2826                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2827
2828                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2829                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2830                 }
2831
2832                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2833                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2834                         $newtitle = wfMessage( 'yourtext' )->parse();
2835
2836                         if ( !$oldContent ) {
2837                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2838                         }
2839
2840                         if ( !$newContent ) {
2841                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2842                         }
2843
2844                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2845                         $de->setContent( $oldContent, $newContent );
2846
2847                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2848                         $de->showDiffStyle();
2849                 } else {
2850                         $difftext = '';
2851                 }
2852
2853                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2854         }
2855
2856         /**
2857          * Show the header copyright warning.
2858          */
2859         protected function showHeaderCopyrightWarning() {
2860                 $msg = 'editpage-head-copy-warn';
2861                 if ( !wfMessage( $msg )->isDisabled() ) {
2862                         global $wgOut;
2863                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2864                                 'editpage-head-copy-warn' );
2865                 }
2866         }
2867
2868         /**
2869          * Give a chance for site and per-namespace customizations of
2870          * terms of service summary link that might exist separately
2871          * from the copyright notice.
2872          *
2873          * This will display between the save button and the edit tools,
2874          * so should remain short!
2875          */
2876         protected function showTosSummary() {
2877                 $msg = 'editpage-tos-summary';
2878                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2879                 if ( !wfMessage( $msg )->isDisabled() ) {
2880                         global $wgOut;
2881                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2882                         $wgOut->addWikiMsg( $msg );
2883                         $wgOut->addHTML( '</div>' );
2884                 }
2885         }
2886
2887         protected function showEditTools() {
2888                 global $wgOut;
2889                 $wgOut->addHTML( '<div class="mw-editTools">' .
2890                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2891                         '</div>' );
2892         }
2893
2894         /**
2895          * Get the copyright warning
2896          *
2897          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2898          */
2899         protected function getCopywarn() {
2900                 return self::getCopyrightWarning( $this->mTitle );
2901         }
2902
2903         /**
2904          * Get the copyright warning, by default returns wikitext
2905          *
2906          * @param Title $title
2907          * @param string $format output format, valid values are any function of
2908          *                       a Message object
2909          * @return string
2910          */
2911         public static function getCopyrightWarning( $title, $format = 'plain' ) {
2912                 global $wgRightsText;
2913                 if ( $wgRightsText ) {
2914                         $copywarnMsg = array( 'copyrightwarning',
2915                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2916                                 $wgRightsText );
2917                 } else {
2918                         $copywarnMsg = array( 'copyrightwarning2',
2919                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2920                 }
2921                 // Allow for site and per-namespace customization of contribution/copyright notice.
2922                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2923
2924                 return "<div id=\"editpage-copywarn\">\n" .
2925                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
2926         }
2927
2928         /**
2929          * Get the Limit report for page previews
2930          *
2931          * @since 1.22
2932          * @param ParserOutput $output ParserOutput object from the parse
2933          * @return string HTML
2934          */
2935         public static function getPreviewLimitReport( $output ) {
2936                 if ( !$output || !$output->getLimitReportData() ) {
2937                         return '';
2938                 }
2939
2940                 wfProfileIn( __METHOD__ );
2941
2942                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
2943                         wfMessage( 'limitreport-title' )->parseAsBlock()
2944                 );
2945
2946                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
2947                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
2948
2949                 $limitReport .= Html::openElement( 'table', array(
2950                         'class' => 'preview-limit-report wikitable'
2951                 ) ) .
2952                         Html::openElement( 'tbody' );
2953
2954                 foreach ( $output->getLimitReportData() as $key => $value ) {
2955                         if ( wfRunHooks( 'ParserLimitReportFormat',
2956                                 array( $key, &$value, &$limitReport, true, true )
2957                         ) ) {
2958                                 $keyMsg = wfMessage( $key );
2959                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
2960                                 if ( !$valueMsg->exists() ) {
2961                                         $valueMsg = new RawMessage( '$1' );
2962                                 }
2963                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
2964                                         $limitReport .= Html::openElement( 'tr' ) .
2965                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
2966                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
2967                                                 Html::closeElement( 'tr' );
2968                                 }
2969                         }
2970                 }
2971
2972                 $limitReport .= Html::closeElement( 'tbody' ) .
2973                         Html::closeElement( 'table' ) .
2974                         Html::closeElement( 'div' );
2975
2976                 wfProfileOut( __METHOD__ );
2977
2978                 return $limitReport;
2979         }
2980
2981         protected function showStandardInputs( &$tabindex = 2 ) {
2982                 global $wgOut;
2983                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2984
2985                 if ( $this->section != 'new' ) {
2986                         $this->showSummaryInput( false, $this->summary );
2987                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2988                 }
2989
2990                 $checkboxes = $this->getCheckboxes( $tabindex,
2991                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2992                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2993
2994                 // Show copyright warning.
2995                 $wgOut->addWikiText( $this->getCopywarn() );
2996                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2997
2998                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2999                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3000
3001                 $cancel = $this->getCancelLink();
3002                 if ( $cancel !== '' ) {
3003                         $cancel .= Html::element( 'span',
3004                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3005                                 wfMessage( 'pipe-separator' )->text() );
3006                 }
3007                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
3008                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3009                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3010                         wfMessage( 'newwindow' )->parse();
3011                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3012                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3013                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3014                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3015                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3016         }
3017
3018         /**
3019          * Show an edit conflict. textbox1 is already shown in showEditForm().
3020          * If you want to use another entry point to this function, be careful.
3021          */
3022         protected function showConflict() {
3023                 global $wgOut;
3024
3025                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3026                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3027
3028                         $content1 = $this->toEditContent( $this->textbox1 );
3029                         $content2 = $this->toEditContent( $this->textbox2 );
3030
3031                         $handler = ContentHandler::getForModelID( $this->contentModel );
3032                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3033                         $de->setContent( $content2, $content1 );
3034                         $de->showDiff(
3035                                 wfMessage( 'yourtext' )->parse(),
3036                                 wfMessage( 'storedversion' )->text()
3037                         );
3038
3039                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3040                         $this->showTextbox2();
3041                 }
3042         }
3043
3044         /**
3045          * @return string
3046          */
3047         public function getCancelLink() {
3048                 $cancelParams = array();
3049                 if ( !$this->isConflict && $this->oldid > 0 ) {
3050                         $cancelParams['oldid'] = $this->oldid;
3051                 }
3052
3053                 return Linker::linkKnown(
3054                         $this->getContextTitle(),
3055                         wfMessage( 'cancel' )->parse(),
3056                         array( 'id' => 'mw-editform-cancel' ),
3057                         $cancelParams
3058                 );
3059         }
3060
3061         /**
3062          * Returns the URL to use in the form's action attribute.
3063          * This is used by EditPage subclasses when simply customizing the action
3064          * variable in the constructor is not enough. This can be used when the
3065          * EditPage lives inside of a Special page rather than a custom page action.
3066          *
3067          * @param $title Title object for which is being edited (where we go to for &action= links)
3068          * @return string
3069          */
3070         protected function getActionURL( Title $title ) {
3071                 return $title->getLocalURL( array( 'action' => $this->action ) );
3072         }
3073
3074         /**
3075          * Check if a page was deleted while the user was editing it, before submit.
3076          * Note that we rely on the logging table, which hasn't been always there,
3077          * but that doesn't matter, because this only applies to brand new
3078          * deletes.
3079          */
3080         protected function wasDeletedSinceLastEdit() {
3081                 if ( $this->deletedSinceEdit !== null ) {
3082                         return $this->deletedSinceEdit;
3083                 }
3084
3085                 $this->deletedSinceEdit = false;
3086
3087                 if ( $this->mTitle->isDeletedQuick() ) {
3088                         $this->lastDelete = $this->getLastDelete();
3089                         if ( $this->lastDelete ) {
3090                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3091                                 if ( $deleteTime > $this->starttime ) {
3092                                         $this->deletedSinceEdit = true;
3093                                 }
3094                         }
3095                 }
3096
3097                 return $this->deletedSinceEdit;
3098         }
3099
3100         protected function getLastDelete() {
3101                 $dbr = wfGetDB( DB_SLAVE );
3102                 $data = $dbr->selectRow(
3103                         array( 'logging', 'user' ),
3104                         array(
3105                                 'log_type',
3106                                 'log_action',
3107                                 'log_timestamp',
3108                                 'log_user',
3109                                 'log_namespace',
3110                                 'log_title',
3111                                 'log_comment',
3112                                 'log_params',
3113                                 'log_deleted',
3114                                 'user_name'
3115                         ), array(
3116                                 'log_namespace' => $this->mTitle->getNamespace(),
3117                                 'log_title' => $this->mTitle->getDBkey(),
3118                                 'log_type' => 'delete',
3119                                 'log_action' => 'delete',
3120                                 'user_id=log_user'
3121                         ),
3122                         __METHOD__,
3123                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3124                 );
3125                 // Quick paranoid permission checks...
3126                 if ( is_object( $data ) ) {
3127                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3128                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3129                         }
3130
3131                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3132                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3133                         }
3134                 }
3135                 return $data;
3136         }
3137
3138         /**
3139          * Get the rendered text for previewing.
3140          * @throws MWException
3141          * @return string
3142          */
3143         function getPreviewText() {
3144                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3145
3146                 wfProfileIn( __METHOD__ );
3147
3148                 if ( $wgRawHtml && !$this->mTokenOk ) {
3149                         // Could be an offsite preview attempt. This is very unsafe if
3150                         // HTML is enabled, as it could be an attack.
3151                         $parsedNote = '';
3152                         if ( $this->textbox1 !== '' ) {
3153                                 // Do not put big scary notice, if previewing the empty
3154                                 // string, which happens when you initially edit
3155                                 // a category page, due to automatic preview-on-open.
3156                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3157                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3158                         }
3159                         wfProfileOut( __METHOD__ );
3160                         return $parsedNote;
3161                 }
3162
3163                 $note = '';
3164
3165                 try {
3166                         $content = $this->toEditContent( $this->textbox1 );
3167
3168                         $previewHTML = '';
3169                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
3170                                 wfProfileOut( __METHOD__ );
3171                                 return $previewHTML;
3172                         }
3173
3174                         # provide a anchor link to the editform
3175                         $continueEditing = '<span class="mw-continue-editing">' .
3176                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3177                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3178                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3179                                 if ( $this->mTokenOkExceptSuffix ) {
3180                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3181
3182                                 } else {
3183                                         $note = wfMessage( 'session_fail_preview' )->plain();
3184                                 }
3185                         } elseif ( $this->incompleteForm ) {
3186                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3187                         } else {
3188                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3189                         }
3190
3191                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3192                         $parserOptions->setEditSection( false );
3193                         $parserOptions->setIsPreview( true );
3194                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3195
3196                         # don't parse non-wikitext pages, show message about preview
3197                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3198                                 if ( $this->mTitle->isCssJsSubpage() ) {
3199                                         $level = 'user';
3200                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3201                                         $level = 'site';
3202                                 } else {
3203                                         $level = false;
3204                                 }
3205
3206                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3207                                         $format = 'css';
3208                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3209                                         $format = 'js';
3210                                 } else {
3211                                         $format = false;
3212                                 }
3213
3214                                 # Used messages to make sure grep find them:
3215                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3216                                 if ( $level && $format ) {
3217                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3218                                                 wfMessage( "{$level}{$format}preview" )->text() .
3219                                                 ' ' . $continueEditing . "</div>";
3220                                 }
3221                         }
3222
3223                         $rt = $content->getRedirectChain();
3224                         if ( $rt ) {
3225                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
3226                         } else {
3227
3228                                 # If we're adding a comment, we need to show the
3229                                 # summary as the headline
3230                                 if ( $this->section === "new" && $this->summary !== "" ) {
3231                                         $content = $content->addSectionHeader( $this->summary );
3232                                 }
3233
3234                                 $hook_args = array( $this, &$content );
3235                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3236                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3237
3238                                 $parserOptions->enableLimitReport();
3239
3240                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3241                                 # But it's now deprecated, so never mind
3242
3243                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3244                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
3245
3246                                 $previewHTML = $parserOutput->getText();
3247                                 $this->mParserOutput = $parserOutput;
3248                                 $wgOut->addParserOutputNoText( $parserOutput );
3249
3250                                 if ( count( $parserOutput->getWarnings() ) ) {
3251                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3252                                 }
3253                         }
3254                 } catch ( MWContentSerializationException $ex ) {
3255                         $m = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
3256                         $note .= "\n\n" . $m->parse();
3257                         $previewHTML = '';
3258                 }
3259
3260                 if ( $this->isConflict ) {
3261                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3262                 } else {
3263                         $conflict = '<hr />';
3264                 }
3265
3266                 $previewhead = "<div class='previewnote'>\n" .
3267                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3268                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3269
3270                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3271                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3272                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3273                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3274
3275                 wfProfileOut( __METHOD__ );
3276                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3277         }
3278
3279         /**
3280          * @return Array
3281          */
3282         function getTemplates() {
3283                 if ( $this->preview || $this->section != '' ) {
3284                         $templates = array();
3285                         if ( !isset( $this->mParserOutput ) ) {
3286                                 return $templates;
3287                         }
3288                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3289                                 foreach ( array_keys( $template ) as $dbk ) {
3290                                         $templates[] = Title::makeTitle( $ns, $dbk );
3291                                 }
3292                         }
3293                         return $templates;
3294                 } else {
3295                         return $this->mTitle->getTemplateLinksFrom();
3296                 }
3297         }
3298
3299         /**
3300          * Shows a bulletin board style toolbar for common editing functions.
3301          * It can be disabled in the user preferences.
3302          * The necessary JavaScript code can be found in skins/common/edit.js.
3303          *
3304          * @return string
3305          */
3306         static function getEditToolbar() {
3307                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3308                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3309
3310                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3311
3312                 /**
3313                  * $toolarray is an array of arrays each of which includes the
3314                  * filename of the button image (without path), the opening
3315                  * tag, the closing tag, optionally a sample text that is
3316                  * inserted between the two when no selection is highlighted
3317                  * and.  The tip text is shown when the user moves the mouse
3318                  * over the button.
3319                  *
3320                  * Also here: accesskeys (key), which are not used yet until
3321                  * someone can figure out a way to make them work in
3322                  * IE. However, we should make sure these keys are not defined
3323                  * on the edit page.
3324                  */
3325                 $toolarray = array(
3326                         array(
3327                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3328                                 'id'     => 'mw-editbutton-bold',
3329                                 'open'   => '\'\'\'',
3330                                 'close'  => '\'\'\'',
3331                                 'sample' => wfMessage( 'bold_sample' )->text(),
3332                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3333                                 'key'    => 'B'
3334                         ),
3335                         array(
3336                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3337                                 'id'     => 'mw-editbutton-italic',
3338                                 'open'   => '\'\'',
3339                                 'close'  => '\'\'',
3340                                 'sample' => wfMessage( 'italic_sample' )->text(),
3341                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3342                                 'key'    => 'I'
3343                         ),
3344                         array(
3345                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3346                                 'id'     => 'mw-editbutton-link',
3347                                 'open'   => '[[',
3348                                 'close'  => ']]',
3349                                 'sample' => wfMessage( 'link_sample' )->text(),
3350                                 'tip'    => wfMessage( 'link_tip' )->text(),
3351                                 'key'    => 'L'
3352                         ),
3353                         array(
3354                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3355                                 'id'     => 'mw-editbutton-extlink',
3356                                 'open'   => '[',
3357                                 'close'  => ']',
3358                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3359                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3360                                 'key'    => 'X'
3361                         ),
3362                         array(
3363                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3364                                 'id'     => 'mw-editbutton-headline',
3365                                 'open'   => "\n== ",
3366                                 'close'  => " ==\n",
3367                                 'sample' => wfMessage( 'headline_sample' )->text(),
3368                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3369                                 'key'    => 'H'
3370                         ),
3371                         $imagesAvailable ? array(
3372                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3373                                 'id'     => 'mw-editbutton-image',
3374                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3375                                 'close'  => ']]',
3376                                 'sample' => wfMessage( 'image_sample' )->text(),
3377                                 'tip'    => wfMessage( 'image_tip' )->text(),
3378                                 'key'    => 'D',
3379                         ) : false,
3380                         $imagesAvailable ? array(
3381                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3382                                 'id'     => 'mw-editbutton-media',
3383                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3384                                 'close'  => ']]',
3385                                 'sample' => wfMessage( 'media_sample' )->text(),
3386                                 'tip'    => wfMessage( 'media_tip' )->text(),
3387                                 'key'    => 'M'
3388                         ) : false,
3389                         $wgUseTeX ? array(
3390                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3391                                 'id'     => 'mw-editbutton-math',
3392                                 'open'   => "<math>",
3393                                 'close'  => "</math>",
3394                                 'sample' => wfMessage( 'math_sample' )->text(),
3395                                 'tip'    => wfMessage( 'math_tip' )->text(),
3396                                 'key'    => 'C'
3397                         ) : false,
3398                         array(
3399                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3400                                 'id'     => 'mw-editbutton-nowiki',
3401                                 'open'   => "<nowiki>",
3402                                 'close'  => "</nowiki>",
3403                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3404                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3405                                 'key'    => 'N'
3406                         ),
3407                         array(
3408                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3409                                 'id'     => 'mw-editbutton-signature',
3410                                 'open'   => '--~~~~',
3411                                 'close'  => '',
3412                                 'sample' => '',
3413                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3414                                 'key'    => 'Y'
3415                         ),
3416                         array(
3417                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3418                                 'id'     => 'mw-editbutton-hr',
3419                                 'open'   => "\n----\n",
3420                                 'close'  => '',
3421                                 'sample' => '',
3422                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3423                                 'key'    => 'R'
3424                         )
3425                 );
3426
3427                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3428                 foreach ( $toolarray as $tool ) {
3429                         if ( !$tool ) {
3430                                 continue;
3431                         }
3432
3433                         $params = array(
3434                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3435                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3436                                 // Older browsers show a "speedtip" type message only for ALT.
3437                                 // Ideally these should be different, realistically they
3438                                 // probably don't need to be.
3439                                 $tip = $tool['tip'],
3440                                 $open = $tool['open'],
3441                                 $close = $tool['close'],
3442                                 $sample = $tool['sample'],
3443                                 $cssId = $tool['id'],
3444                         );
3445
3446                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3447                 }
3448
3449                 // This used to be called on DOMReady from mediawiki.action.edit, which
3450                 // ended up causing race conditions with the setup code above.
3451                 $script .= "\n" .
3452                         "// Create button bar\n" .
3453                         "$(function() { mw.toolbar.init(); } );\n";
3454
3455                 $script .= '});';
3456                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3457
3458                 $toolbar = '<div id="toolbar"></div>';
3459
3460                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3461
3462                 return $toolbar;
3463         }
3464
3465         /**
3466          * Returns an array of html code of the following checkboxes:
3467          * minor and watch
3468          *
3469          * @param int $tabindex Current tabindex
3470          * @param array $checked of checkbox => bool, where bool indicates the checked
3471          *                 status of the checkbox
3472          *
3473          * @return array
3474          */
3475         public function getCheckboxes( &$tabindex, $checked ) {
3476                 global $wgUser;
3477
3478                 $checkboxes = array();
3479
3480                 // don't show the minor edit checkbox if it's a new page or section
3481                 if ( !$this->isNew ) {
3482                         $checkboxes['minor'] = '';
3483                         $minorLabel = wfMessage( 'minoredit' )->parse();
3484                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3485                                 $attribs = array(
3486                                         'tabindex' => ++$tabindex,
3487                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3488                                         'id' => 'wpMinoredit',
3489                                 );
3490                                 $checkboxes['minor'] =
3491                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3492                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3493                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3494                                         ">{$minorLabel}</label>";
3495                         }
3496                 }
3497
3498                 $watchLabel = wfMessage( 'watchthis' )->parse();
3499                 $checkboxes['watch'] = '';
3500                 if ( $wgUser->isLoggedIn() ) {
3501                         $attribs = array(
3502                                 'tabindex' => ++$tabindex,
3503                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3504                                 'id' => 'wpWatchthis',
3505                         );
3506                         $checkboxes['watch'] =
3507                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3508                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3509                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3510                                 ">{$watchLabel}</label>";
3511                 }
3512                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3513                 return $checkboxes;
3514         }
3515
3516         /**
3517          * Returns an array of html code of the following buttons:
3518          * save, diff, preview and live
3519          *
3520          * @param int $tabindex Current tabindex
3521          *
3522          * @return array
3523          */
3524         public function getEditButtons( &$tabindex ) {
3525                 $buttons = array();
3526
3527                 $temp = array(
3528                         'id' => 'wpSave',
3529                         'name' => 'wpSave',
3530                         'type' => 'submit',
3531                         'tabindex' => ++$tabindex,
3532                         'value' => wfMessage( 'savearticle' )->text(),
3533                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3534                         'title' => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3535                 );
3536                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3537
3538                 ++$tabindex; // use the same for preview and live preview
3539                 $temp = array(
3540                         'id' => 'wpPreview',
3541                         'name' => 'wpPreview',
3542                         'type' => 'submit',
3543                         'tabindex' => $tabindex,
3544                         'value' => wfMessage( 'showpreview' )->text(),
3545                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3546                         'title' => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3547                 );
3548                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3549                 $buttons['live'] = '';
3550
3551                 $temp = array(
3552                         'id' => 'wpDiff',
3553                         'name' => 'wpDiff',
3554                         'type' => 'submit',
3555                         'tabindex' => ++$tabindex,
3556                         'value' => wfMessage( 'showdiff' )->text(),
3557                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3558                         'title' => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3559                 );
3560                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3561
3562                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3563                 return $buttons;
3564         }
3565
3566         /**
3567          * Output preview text only. This can be sucked into the edit page
3568          * via JavaScript, and saves the server time rendering the skin as
3569          * well as theoretically being more robust on the client (doesn't
3570          * disturb the edit box's undo history, won't eat your text on
3571          * failure, etc).
3572          *
3573          * @todo This doesn't include category or interlanguage links.
3574          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3575          *       or something...</s>" that might also require more skin
3576          *       initialization, so check whether that's a problem.
3577          */
3578         function livePreview() {
3579                 global $wgOut;
3580                 $wgOut->disable();
3581                 header( 'Content-type: text/xml; charset=utf-8' );
3582                 header( 'Cache-control: no-cache' );
3583
3584                 $previewText = $this->getPreviewText();
3585                 #$categories = $skin->getCategoryLinks();
3586
3587                 $s =
3588                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3589                 Xml::tags( 'livepreview', null,
3590                         Xml::element( 'preview', null, $previewText )
3591                         #.      Xml::element( 'category', null, $categories )
3592                 );
3593                 echo $s;
3594         }
3595
3596         /**
3597          * Call the stock "user is blocked" page
3598          *
3599          * @deprecated in 1.19; throw an exception directly instead
3600          */
3601         function blockedPage() {
3602                 wfDeprecated( __METHOD__, '1.19' );
3603                 global $wgUser;
3604
3605                 throw new UserBlockedError( $wgUser->getBlock() );
3606         }
3607
3608         /**
3609          * Produce the stock "please login to edit pages" page
3610          *
3611          * @deprecated in 1.19; throw an exception directly instead
3612          */
3613         function userNotLoggedInPage() {
3614                 wfDeprecated( __METHOD__, '1.19' );
3615                 throw new PermissionsError( 'edit' );
3616         }
3617
3618         /**
3619          * Show an error page saying to the user that he has insufficient permissions
3620          * to create a new page
3621          *
3622          * @deprecated in 1.19; throw an exception directly instead
3623          */
3624         function noCreatePermission() {
3625                 wfDeprecated( __METHOD__, '1.19' );
3626                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3627                 throw new PermissionsError( $permission );
3628         }
3629
3630         /**
3631          * Creates a basic error page which informs the user that
3632          * they have attempted to edit a nonexistent section.
3633          */
3634         function noSuchSectionPage() {
3635                 global $wgOut;
3636
3637                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3638
3639                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3640                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3641                 $wgOut->addHTML( $res );
3642
3643                 $wgOut->returnToMain( false, $this->mTitle );
3644         }
3645
3646         /**
3647          * Show "your edit contains spam" page with your diff and text
3648          *
3649          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3650          */
3651         public function spamPageWithContent( $match = false ) {
3652                 global $wgOut, $wgLang;
3653                 $this->textbox2 = $this->textbox1;
3654
3655                 if ( is_array( $match ) ) {
3656                         $match = $wgLang->listToText( $match );
3657                 }
3658                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3659
3660                 $wgOut->addHTML( '<div id="spamprotected">' );
3661                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3662                 if ( $match ) {
3663                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3664                 }
3665                 $wgOut->addHTML( '</div>' );
3666
3667                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3668                 $this->showDiff();
3669
3670                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3671                 $this->showTextbox2();
3672
3673                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3674         }
3675
3676         /**
3677          * Format an anchor fragment as it would appear for a given section name
3678          * @param $text String
3679          * @return String
3680          * @private
3681          */
3682         function sectionAnchor( $text ) {
3683                 global $wgParser;
3684                 return $wgParser->guessSectionNameFromWikiText( $text );
3685         }
3686
3687         /**
3688          * Check if the browser is on a blacklist of user-agents known to
3689          * mangle UTF-8 data on form submission. Returns true if Unicode
3690          * should make it through, false if it's known to be a problem.
3691          * @return bool
3692          * @private
3693          */
3694         function checkUnicodeCompliantBrowser() {
3695                 global $wgBrowserBlackList, $wgRequest;
3696
3697                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3698                 if ( $currentbrowser === false ) {
3699                         // No User-Agent header sent? Trust it by default...
3700                         return true;
3701                 }
3702
3703                 foreach ( $wgBrowserBlackList as $browser ) {
3704                         if ( preg_match( $browser, $currentbrowser ) ) {
3705                                 return false;
3706                         }
3707                 }
3708                 return true;
3709         }
3710
3711         /**
3712          * Filter an input field through a Unicode de-armoring process if it
3713          * came from an old browser with known broken Unicode editing issues.
3714          *
3715          * @param $request WebRequest
3716          * @param $field String
3717          * @return String
3718          * @private
3719          */
3720         function safeUnicodeInput( $request, $field ) {
3721                 $text = rtrim( $request->getText( $field ) );
3722                 return $request->getBool( 'safemode' )
3723                         ? $this->unmakesafe( $text )
3724                         : $text;
3725         }
3726
3727         /**
3728          * @param $request WebRequest
3729          * @param $text string
3730          * @return string
3731          */
3732         function safeUnicodeText( $request, $text ) {
3733                 $text = rtrim( $text );
3734                 return $request->getBool( 'safemode' )
3735                         ? $this->unmakesafe( $text )
3736                         : $text;
3737         }
3738
3739         /**
3740          * Filter an output field through a Unicode armoring process if it is
3741          * going to an old browser with known broken Unicode editing issues.
3742          *
3743          * @param $text String
3744          * @return String
3745          * @private
3746          */
3747         function safeUnicodeOutput( $text ) {
3748                 global $wgContLang;
3749                 $codedText = $wgContLang->recodeForEdit( $text );
3750                 return $this->checkUnicodeCompliantBrowser()
3751                         ? $codedText
3752                         : $this->makesafe( $codedText );
3753         }
3754
3755         /**
3756          * A number of web browsers are known to corrupt non-ASCII characters
3757          * in a UTF-8 text editing environment. To protect against this,
3758          * detected browsers will be served an armored version of the text,
3759          * with non-ASCII chars converted to numeric HTML character references.
3760          *
3761          * Preexisting such character references will have a 0 added to them
3762          * to ensure that round-trips do not alter the original data.
3763          *
3764          * @param $invalue String
3765          * @return String
3766          * @private
3767          */
3768         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 $invalue String
3807          * @return String
3808          * @private
3809          */
3810         function unmakesafe( $invalue ) {
3811                 $result = "";
3812                 for ( $i = 0; $i < strlen( $invalue ); $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 }